POWDER BUCKET AND POWDER DISPENSING DEVICE

Abstract

A powder bucket and a powder dispensing device are provided. The powder bucket includes a bucket body, a stirring rod, a funnel, and a scraper. The bucket body defines a first accommodating cavity and has a powder outlet in communication with the first accommodating cavity. The stirring rod is rotatable around an axis of the stirring rod, at least partially placed in the first accommodating cavity, and configured to adjust an opening degree of the powder outlet. The funnel has one end connected to the bucket body and the other end having a powder leakage port. The powder outlet and the powder leakage port are both in communication with a second accommodating cavity defined by the funnel. The scraper is at least partially placed in the second accommodating cavity, connected to the stirring rod, and rotatable around the axis of the stirring rod following rotation of the stirring rod.

Claims

1. A powder bucket, comprising: a bucket body, defining a first accommodating cavity for storing powder and having a powder outlet in communication with the first accommodating cavity; a stirring rod, rotatable around an axis of the stirring rod, at least partially placed in the first accommodating cavity, and configured to adjust an opening degree of the powder outlet; a funnel, having one end connected to the bucket body and the other end having a powder leakage port, wherein the funnel defines a second accommodating cavity, and the powder outlet and the powder leakage port are both in communication with the second accommodating cavity; and a scraper, at least partially placed in the second accommodating cavity, connected to the stirring rod, and rotatable around the axis of the stirring rod following rotation of the stirring rod.

2. The powder bucket of claim 1, wherein a radial dimension of the funnel gradually decreases from the end of the funnel connected to the bucket body to the other end of the funnel having the powder leakage port; and a caliber of the powder leakage port is smaller than or equal to a caliber of the powder outlet.

3. The powder bucket of claim 1, wherein the bucket body has a conical structure at one end of the bucket body close to the funnel, the funnel is detachably connected to the bucket body, and the conical structure is at least partially located in the funnel.

4. The powder bucket of claim 1, wherein the scraper extends out of the funnel from the powder leakage port.

5. The powder bucket of claim 1, wherein the scraper comprises a connecting segment and a powder-scraping segment, the connecting segment is connected to the stirring rod, the powder-scraping segment is connected to the connecting segment, and the powder-scraping segment is at least partially adjacent to or in contact with an inner wall of the second accommodating cavity, and is configured to scrape off powder on the inner wall of the second accommodating cavity.

6. The powder bucket of claim 5, wherein the scraper further comprises a fixing segment, and the fixing segment is connected to the connecting segment and/or the powder-scraping segment; and the fixing segment is movably connected to an outer surface of the bucket body close to the powder outlet, or the fixing segment is movably connected to an inner surface of the funnel at one end of the funnel close to the bucket body.

7. The powder bucket of claim 6, further comprising a limiting structure, wherein the limiting structure is disposed on the outer surface of the bucket body close to the powder outlet, and the fixing segment is cooperatively connected to the limiting structure; and the limiting structure comprises a circlip and a washer, the circlip is snapped to the outer surface of the bucket body close to the powder outlet, and the fixing segment is wound around the bucket body and located at one side of the circlip away from the powder outlet; and the washer is sleeved on the bucket body and located between the circlip and the fixing segment.

8. The powder bucket of claim 5, wherein an inclination angle of the powder-scraping segment relative to the axis of the stirring rod is equal to an inclination angle of the inner wall of the second accommodating cavity relative to the axis of the stirring rod; and/or the powder-scraping segment extends in a spiral with a centerline of the spiral being the axis of the stirring rod.

9. The powder bucket of claim 5, wherein the stirring rod extends out of the bucket body from the powder outlet and extends into the second accommodating cavity; and the scraper is connected to a part of the stirring rod extending out of the bucket body.

10. The powder bucket of claim 9, wherein the stirring rod is movable in an axial direction of the stirring rod; the stirring rod defines a slot in the axial direction of the stirring rod at one end of the stirring rod extending out of the powder outlet, one end of the connecting segment away from the powder-scraping segment extends into the slot, and an inner wall of the slot in the axial direction of the stirring rod is spaced apart from the connecting segment.

11. The powder bucket of claim 6, wherein the fixing segment has one end connected to the connecting segment, and the other end connected to the powder-scraping segment; and the connecting segment is adjacent to the powder-scraping segment, the scraper further comprises a connecting member, and the connecting segment and the powder-scraping segment are connected and fixed to the connecting member.

12. The powder bucket of claim 5, wherein the scraper further comprises a guiding segment, the guiding segment is connected to one end of the powder-scraping segment away from the connecting segment, the guiding segment is located at the powder leakage port, at least a part of the guiding segment extends out of the funnel from the powder leakage port, and the part of the guiding segment extending out of the funnel extends in an axial direction of the stirring rod.

13. The powder bucket of claim 1, further comprising a conduit, wherein the conduit is connected to the funnel, has a central hole in communication with the powder leakage port, and extends in an axial direction of the stirring rod.

14. The powder bucket of claim 1, wherein a communication opening is defined at a connection between the bucket body and the funnel, and the communication opening is used for communicating the second accommodating cavity with the outside.

15. The powder bucket of claim 1, wherein the stirring rod comprises a blocking segment and a powder-outlet segment, the blocking segment is connected to one end of the powder-outlet segment close to the powder leakage port, the blocking segment has a diameter equal to a caliber of the powder outlet, and at least a part of the powder-outlet segment has a radial dimension smaller than the caliber of the powder outlet.

16. The powder bucket of claim 15, wherein an outer circumferential surface of the powder-outlet segment comprises a powder-outlet surface, at least a part of a region of the powder-outlet surface has an angle relative to the axis of the stirring rod, and one end of the powder-outlet surface away from the blocking segment is closer to the axis of the stirring rod than one end of the powder-outlet surface close to the blocking segment.

17. The powder bucket of claim 16, wherein the stirring rod further comprises a main-body segment and an extrusion segment, the main-body segment is connected to one end of the powder-outlet segment away from the blocking segment, the extrusion segment is connected to an end portion of the main-body segment close to the powder-outlet segment or the extrusion segment is connected to the powder-outlet segment, the extrusion segment protrudes from an outer surface of the main-body segment, the extrusion segment has an extrusion surface facing the powder-outlet segment, and the extrusion surface has an angle relative to each of an axial direction of the stirring rod and a circumferential direction of the stirring rod.

18. The powder bucket of claim 17, wherein the extrusion surface further extends to the powder-outlet surface of the powder-outlet segment, and is smoothly connected to the powder-outlet surface, and the extrusion surface has an obtuse angle relative to the powder-outlet surface; and/or the extrusion segment is implemented as a plurality of extrusion segments, and the plurality of extrusion segments are arranged at intervals in the axial direction of the stirring rod; and in a direction from the main-body segment to the blocking segment, a radial dimension of the plurality of extrusion segments protruding from the main-body segment decreases gradually, and in a radial direction of the stirring rod, a radial dimension of a part of an extrusion segment that is closest to the blocking segment and protrudes from the main-body segment is not larger than a maximum radial dimension of a part of the powder-outlet segment protruding from the main-body segment.

19. The powder bucket of claim 1, wherein the bucket body further comprises a cover opening, and the cover opening and the powder outlet are located at two ends of the bucket body in an axial direction of the stirring rod, respectively; and the powder bucket further comprises a cover body, an elastic structure, and a butt joint, the cover body covers the cover opening, the elastic structure is connected to the cover body and the stirring rod, the stirring rod is movably connected to the cover body, and the butt joint is connected to one end of the stirring rod away from the powder outlet; the cover body comprises a cover plate and an extension structure, the cover plate covers the cover opening, the extension structure is connected to the cover plate, the extension structure and the cover plate cooperatively define a collapsible chamber, and the elastic structure is accommodated in the collapsible chamber; and the extension structure protrudes from one side of the cover plate close to the powder outlet, or the extension structure protrudes from one side of the cover plate away from the powder outlet.

20. A powder dispensing device, comprising a driving device and the powder bucket of claim 1, wherein the driving device is configured to drive the stirring rod of the powder bucket to rotate.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0007] To describe technical solutions in implementations of the present disclosure or in the related art more clearly, the following briefly introduces the accompanying drawings required for describing the implementations or the related art. Apparently, the accompanying drawings in the following description show merely some implementations of the present disclosure. For those of ordinary skilled in the art, other accompanying drawings may also be obtained according to these accompanying drawings without creative efforts.

[0008] FIG. 1 is a cross-sectional view and a partial enlarged view of a powder bucket according to embodiments of the present disclosure.

[0009] FIG. 2 is a partial cross-sectional view of a powder bucket from another perspective according to embodiments of the present disclosure.

[0010] FIG. 3 is a three-dimensional view of a powder bucket according to embodiments of the present disclosure, with a funnel omitted.

[0011] FIG. 4 is a three-dimensional view of a scraper according to embodiments of the present disclosure.

[0012] FIG. 5 is a front view of a stirring rod according to embodiments of the present disclosure.

[0013] FIG. 6 is a three-dimensional view of a butt joint according to embodiments of the present disclosure.

[0014] FIG. 7 is a perspective view of a cover body according to embodiments of the present disclosure.

[0015] FIG. 8 is a cross-sectional view of a powder bucket according to other embodiments of the present disclosure.

[0016] FIG. 9 is a front view of a powder bucket according to other embodiments of the present disclosure, with a funnel omitted.

[0017] FIG. 10 is a partial enlarged view at circle A in FIG. 9.

[0018] FIG. 11 is a three-dimensional view of a stirring rod according to other embodiments of the present disclosure.

[0019] FIG. 12 is a schematic view of a powder dispensing device according to embodiments of the present disclosure.

[0020] Illustration of reference signs in the accompanying drawings: 100powder bucket, 10bucket body, 11first accommodating cavity, 12powder outlet, 13cover opening, 14conical structure, 15column structure, 16limiting surface, 17mounting groove, 18communication opening, 20stirring rod, 21slot, 22blocking segment, 23powder-outlet segment, 231powder-outlet surface, 24mainbody segment, 25extrusion segment, 251extrusion surface, 26limiting boss, 27stirring blade, 30funnel, 31second accommodating cavity, 32powder leakage port, 35conduit, 351central hole, 40scraper, 41connecting segment, 42powder-scraping segment, 43fixing segment, 44connecting member, 45guiding segment, 51circlip, 52washer, 60cover body, 61cover plate, 611powder inlet, 612first mounting hole, 62extension structure, 621collapsible chamber, 622second mounting hole, 70elastic structure, 71spring, 72slider, 80butt joint, 81fitting groove, 90locking mechanism, 200driving device, 300powder dispensing device.

DETAILED DESCRIPTION

[0021] The following clearly and completely describes technical solutions in implementations of the present disclosure with reference to the accompanying drawings in the implementations of the present disclosure. Apparently, the described implementations are merely some rather than all of the implementations of the present disclosure. Based on the implementations of the present disclosure, all other implementations obtained by those of ordinary skill in the art without creative efforts shall belong to the protection scope of the present disclosure.

[0022] It may be noted that when a component is referred to as fixed to another component, the component may be directly positioned on the other component or an intermediate component may exist therebetween. When a component is referred to as connected to another component, the component may be directly connected to the other component or an intermediate component may exist therebetween simultaneously.

[0023] Unless otherwise defined, all technical and scientific terms used in the present disclosure have the same meaning as commonly understood by those skilled in the art of the present disclosure. The terms used in the detailed description in the present disclosure are for the purpose of describing specific embodiments only and are not intended to limit the present disclosure. The term and/or in the present disclosure includes any and all combinations of one or more related listed items.

[0024] The following will describe in detail some implementations of the present disclosure with reference to the accompanying drawings. Various embodiments and features therein may be implemented in any combination with each other without conflict.

[0025] Reference can be made to FIG. 1, and a powder dispensing device 300 is provided in embodiments of the present disclosure. The powder dispensing device 300 includes a driving device 200 and a powder bucket 100 according to any following embodiment of the present disclosure. The driving device 200 is configured to drive a stirring rod 20 of the powder bucket 100 to rotate.

[0026] The structure of the driving device 200 is not limited. The driving device 200 is configured to drive the stirring rod 20 to rotate, so as to stir and discharge powder in the powder bucket 100.

[0027] In the powder dispensing device 300 in the embodiments of the present disclosure, by adopting the powder bucket 100 including a funnel 30, the powder scattered around when discharged from the powder outlet 12 of a bucket body 10 can be collected, and then the powder thus collected can be discharged from a powder leakage port 32 in a concentrated manner. Therefore, the powder dispensing device 300 can be compatible with a container having a smaller opening dimension, thereby avoiding the powder from being scattered outside the container and avoiding powder loss. In addition, the powder entering the container matches the powder quantitatively discharged from the powder bucket 100, so that the precision of powder dispensing is high.

[0028] The powder bucket 100 according to the embodiments of the present disclosure will be described in detail below.

[0029] Referring to FIG. 1 to FIG. 4, the powder bucket 100 is provided in the embodiments of the present disclosure. The powder bucket 100 includes a bucket body 10, a stirring rod 20, a funnel 30, and a scraper 40.

[0030] The bucket body 10 defines a first accommodating cavity 11 for storing powder and has a powder outlet 12 in communication with the first accommodating cavity 11. The stirring rod 20 is rotatable around an axis of the stirring rod 20. The stirring rod 20 is at least partially placed in the first accommodating cavity 11. The stirring rod 20 is configured to adjust an opening degree of the powder outlet 12. The funnel 30 has one end connected to the bucket body 10, and the other end having a powder leakage port 32. The funnel 30 defines a second accommodating cavity 31. The powder outlet 12 and the powder leakage port 32 are both in communication with the second accommodating cavity 31. The scraper 40 is at least partially placed in the second accommodating cavity 31. The scraper 40 is connected to the stirring rod 20. The scraper 40 is rotatable around the axis of the stirring rod 20 following rotation of the stirring rod 20.

[0031] The shape, structure, etc., of the bucket body 10 are not limited. The first

[0032] accommodating cavity 11 of the bucket body 10 is used for storing the powder. The powder may be solid powder, particulate matter, etc. When the powder bucket 100 is in use, the powder outlet 12 is located at the bottom of the bucket body 10, that is, the powder outlet 12 is located at a position of the bucket body 10 closest to the center of earth. Therefore, the powder stored in the first accommodating cavity 11 flows naturally towards the powder outlet 12 under the gravity and is gathered, thereby facilitating discharging the powder.

[0033] The stirring rod 20 is substantially in a column shape extending linearly. When the powder bucket 100 is in use, the stirring rod 20 extends substantially in a vertical direction. The stirring rod 20 is at least partially accommodated in the first accommodating cavity 11, rotatable around the axis of the stirring rod 20, and can adjust the opening degree of the powder outlet 12. The opening degree of the powder outlet 12 may range from 0 to 100%. When the opening degree is 0, the powder outlet 12 is completely blocked by the stirring rod 20, and the powder cannot be discharged from powder outlet 12. When the opening degree is 100%, the powder outlet 12 is completely open, that is, the powder outlet 12 is not blocked by the stirring rod 20 at all, and a powder discharging speed is the fastest. Optionally, the opening degree of the powder outlet 12 may range from 0 to 60%, that is, when the maximum opening degree of the powder outlet 12 is 60%, the powder outlet 12 cannot be completely open, so that the fastest powder discharging speed is controlled not to be excessive. Optionally, the stirring rod 20 can pass through the powder outlet 12, so as to facilitate mounting and arrangement of the stirring rod 20 and the powder bucket 100. With the special shape and structure of the stirring rod 20, the opening degree of the powder outlet 12 can be adjusted when the stirring rod 20 rotates. Since the powder outlet 12 needs to accommodate at least a part of the stirring rod 20, the opening degree of the powder outlet 12 ranging from 0 to 60% can meet the requirement of the arrangement of the stirring rod 20 in the powder outlet 12. The value of the opening degree of the powder outlet 12 may be 0, 10%, 20%, 30%, 40%, 50%, 60%, etc., which is not limited.

[0034] It can be understood that, in the powder bucket 100, the opening degree of the powder outlet 12 is adjusted by the rotation of the stirring rod 20 and the powder is stirred by the rotation of the stirring rod 20, or the opening degree of the powder outlet 12 is adjusted by movement of the stirring rod 20 in the axial direction of the stirring rod 20 (linear movement) and the powder is stirred by the rotation of the stirring rod 20, which is not limited in the embodiments.

[0035] The funnel 30 is disposed outside the bucket body 10. The funnel 30 has a larger end and a smaller end in dimension. The larger end of the funnel 30 is connected to the bucket body 10. When the powder bucket 100 is in use, the larger end of the funnel 30 and the smaller end of the funnel 30 are substantially opposite to each other in the vertical direction, and the smaller end of the funnel 30 is closer to the center of earth. When the larger end of the funnel 30 is connected to the bucket body 10, a sealing structure can be formed between the funnel 30 and the bucket body 10, and the smaller end of the funnel 30 has the powder leakage port 32. In this way, the powder outlet 12 of the bucket body 10 is in communication with the second accommodating cavity 31, and the second accommodating cavity 31 is in communication with the outside only through the powder leakage port 32. The powder scattered around when discharged from the powder outlet 12 falls onto an inner wall of the funnel 30, flows naturally along the inner wall of the funnel 30 towards the powder leakage port 32 under the gravity, and then falls into the container from the powder leakage port 32.

[0036] The scraper 40 is at least partially accommodated in the second accommodating cavity 31. When the stirring rod 20 rotates, the scraper 40 can be driven to rotate. The powder remaining on the inner wall of the funnel 30 can be scraped off by the scraper 40 and then discharged from the powder leakage port 32. The shape and structure of the scraper 40 are not limited.

[0037] In the embodiments of the present disclosure, by providing the funnel 30, the powder scattered around when discharged from the powder outlet 12 of the powder bucket 10 can be collected and discharged from the powder leakage port 32. Therefore, the powder bucket 100 can be compatible with the container having a smaller opening dimension. The scraper 40 can scrape off the powder on the inner wall of the funnel 30 to avoid the powder from remaining in the funnel 30, so that all the powder output from the bucket body 10 can enter the container through the funnel 30, thereby avoiding powder loss. In addition, the powder entering the container matches the powder quantitatively discharged from the powder bucket 100, so that the precision of powder dispensing is high, which helps to improve the accuracy of subsequent experiment results.

[0038] Optionally, referring to FIG. 1 and FIG. 2, a radial dimension of the funnel 30 gradually decreases from the end of the funnel 30 connected to the bucket body 10 to the other end of the funnel 30 having the powder leakage port 32. A caliber of the powder leakage port 32 is smaller than or equal to a caliber of the powder outlet 12.

[0039] The funnel 30 may have a rotationally symmetrical structure. The radial dimension of the funnel 30 refers to a dimension of the funnel 30 in the radial direction of the stirring rod 20. The powder leakage port 32 and the powder outlet 12 each may also be in a rotationally symmetrical shape. The caliber of the powder leakage port 32 also refers to a dimension of the powder leakage port 32 in the radial direction of the stirring rod 20. The powder outlet 12 also refers to a dimension of the powder outlet 12 in the radial direction of the stirring rod 20. This is not limited.

[0040] Exemplarily, the funnel 30 may have a substantially circular conical structure. A cross section of one end of the bucket body 10 close to the funnel 30 may also be substantially circular. The radial dimension of the funnel 30 is the diameter. The radial dimension of the funnel 30 is set to gradually decrease from the end of the funnel 30 connected to the bucket body 10 to the other end of the funnel 30 having the powder leakage port 32, so that the inner wall of the funnel 30 can form an inclined surface, which facilitates the powder to slide along the inner wall of the funnel 30 to the powder leakage port 32 under the gravity.

[0041] Exemplarily, the powder outlet 12 and the powder leakage port 32 each may be circular, and the caliber of the powder outlet 12 and the caliber of the powder leakage port 32 each refer to the diameter. The powder from the powder outlet 12 is scattered around due to the stirring rod 20, but the powder from the powder leakage port 32 is not scattered around thanks to an accommodating effect of the funnel 30. Therefore, compared with a manner in which the funnel 30 is not provided and powder is directly discharged to the container through the powder outlet 12, a manner in which the funnel 30 is provided and the powder is discharged from the powder leakage port 32 can avoid the powder from being scattered to the outside the container. Therefore, the powder leakage port 32 can be adapted to the container having a smaller opening dimension, the powder can be discharged from the powder leakage port 32 into the container, so that the precision of powder dispensing is still high even in a special situation where the opening dimension of the container is relatively small, thereby improving the applicability of the powder bucket 100. It can be understood that, the powder outlet 12 and the powder leakage port 32 may also have other shapes, for example, the powder leakage port 32 has a circular shape, and the powder outlet 12 has a semi-circular shape, an oval shape, a sector shape, a polygonal shape, and the like, which are not limited herein.

[0042] Optionally, a central line of the stirring rod 20, a central line of the powder outlet 12, a central line of the funnel 30, and a central line of the powder leakage port 32 are collinear. With this arrangement, the risk of powder sticking to the wall can be reduced as much as possible, and the falling speed of the powder can be accelerated.

[0043] Optionally, referring to FIG. 1 and FIG. 2, the bucket body 10 has a conical structure 14 at one end of the bucket body 10 close to the funnel 30. The funnel 30 is detachably connected to the bucket body 10. The conical structure 14 is at least partially located in the funnel 30.

[0044] The conical structure 14 of the bucket body 10 extends upwards from the powder outlet 12 (i.e., in a direction away from the powder leakage port 32), and has a shape in which the conical structure 14 has the minimum diameter at the powder outlet 12 and gradually increases upwards. The bucket body 10 may further have a column structure 15. The conical structure 14 is smoothly connected to the column structure 15. When the funnel 30 is connected to the bucket body 10, the funnel 30 may be connected to the conical structure 14, may be connected to the column structure 15, or may be connected to a connection between the conical structure 14 and the column structure 15, which is not limited. The conical structure 14 and the column structure 15 each may be a rotationally symmetrical structure. Further, the conical structure 14 may be a circular conical shape, and the column structure 15 may be a cylindrical shape, which are not limited herein.

[0045] A detachable connection manner between the funnel 30 and the bucket body 10 may be screw connection, snap connection, sleeve connection, adhesion bonding, magnetic attraction, etc., which is not limited. The conical structure 14 of the bucket body 10 is at least partially located in the funnel 30, so that the powder outlet 12 is located at a position between a connection between the funnel 30 and the bucket body 10 and the powder leakage port 32. Therefore, when the powder is discharged from the powder outlet 12, the powder only enters the second accommodating cavity 31 of the funnel 30 and does not leak to the outside from the connection between the funnel 30 and the bucket body 10, thereby improving the sealing performance.

[0046] Optionally, referring to FIG. 2, the scraper 40 extends out of the funnel 30 from the powder leakage port 32. The scraper 40 extends out of the powder leakage port 32, and the powder can be collected around the scraper 40 to be discharged, so that the scraper 40 can play a role of guiding a discharging direction of the powder. With regard to the container having a smaller opening dimension, the part of the scraper 40 extending out of the funnel 30 can extend into the container, to guide the powder to enter the container from the opening of the container. The scraper 40 at the powder leakage port 32 occupies a part of the space of the powder leakage port 32, but the radial dimension of the scraper 40 at the powder leakage port 32 is much smaller than the caliber of the powder leakage port 32, so that a blocking effect of the scraper 40 on the powder can be negligible, and an influence on the powder discharging speed can be negligible. Optionally, an extension direction of the part of the scraper 40 extending out of the funnel 30 may be parallel to the axial direction of the stirring rod 20, thereby facilitating guiding the powder to fall vertically into the container, and avoiding the powder from being scattered around. In addition, an upper end of the part of the scraper 40 extending out of the funnel 30 is in contact with an inner wall of the powder leakage port 32. Therefore, when the stirring rod 20 rotates, the upper end of the part of the scraper 40 extending out of the funnel 30 can scrape off the powder remaining on the inner wall of the powder leakage port 32, thereby further improving the precision of powder dispensing.

[0047] Optionally, referring to FIG. 1 to FIG. 4, the scraper 40 includes a connecting segment 41 and a powder-scraping segment 42. The connecting segment 41 is connected to the stirring rod 20. The powder-scraping segment 42 is connected to the connecting segment 41. The powder-scraping segment 42 is at least partially adjacent to or in contact with an inner wall of the second accommodating cavity 31. The powder-scraping segment 42 is configured to scrape off powder on the inner wall of the second accommodating cavity 31.

[0048] The powder-scraping segment 42 may be connected to the connecting segment 41 directly or indirectly. Indirect connection means that the powder-scraping segment 42 and the connecting segment 41 may be connected through an intermediate member, which is not limited. A connection manner between the connecting segment 41 and the stirring rod 20 may be fixed connection, rotatable connection, movable connection, etc., which is not limited. The powder-scraping segment 42 is at least partially adjacent to or in contact with the inner wall of the second accommodating cavity 31 (i.e., the inner wall of the funnel 30). In some embodiments, the powder-scraping segment 42 is at least partially adjacent to the inner wall of the second accommodating cavity 31, that is, at least a part of the powder-scraping segment 42 has a small distance from the inner wall of the second accommodating cavity 31, and the distance is smaller than the size of the powder. Therefore, not only can direct friction between the powder-scraping segment 42 and the inner wall of the second accommodating cavity 31 and affecting the operating efficiency and service life of the powder-scraping segment 42 be avoided, but also the powder on the inner wall of the second accommodating cavity 31 can be scraped off well. The powder-scraping segment 42 is at least partially in contact with the inner wall of the second accommodating cavity 31, which may be understood as that at least a part of the powder-scraping segment 42 is in slight contact with the inner wall of the second accommodating cavity 31, so as to reduce friction between the powder-scraping segment 42 and the inner wall of the second accommodating cavity 31 as much as possible. During rotation of the powder-scraping segment 42 following the rotation of the stirring rod 20, the powder-scraping segment 42 can sweep throughout the inner wall of the second accommodating cavity 31 in a circumferential direction the second accommodating cavity 31, and sweep through most of the inner wall of the second accommodating cavity 31 in an axial direction of the second accommodating cavity 31. Therefore, the powder on the inner wall of the second accommodating cavity 31 can be scraped off, thereby avoiding the powder from remaining on the inner wall of the second accommodating cavity 31, and avoiding the powder discharging amount from being less than expected.

[0049] Optionally, referring to FIG. 1 to FIG. 4, the scraper 40 further includes a fixing segment 43. The fixing segment 43 is connected to the connecting segment 41 and/or the powder-scraping segment 42. The fixing segment 43 is movably connected to an outer surface of the bucket body 10 close to the powder outlet 12, or the fixing segment 43 is movably connected to an inner surface of the funnel 30 at one end of the funnel 30 close to the bucket body 10.

[0050] The fixing segment 43 may be directly or indirectly connected to the connecting segment 41. The fixing segment 43 may also be directly or indirectly connected to the powder-scraping segment 42. For indirect connection, reference can be made to the foregoing similar description. If the fixing segment 43 is movably connected to the bucket body 10, a movable connection manner between the fixing segment 43 and the bucket body 10 may be rotational connection, mobile connection, etc., which is not limited. If the fixing segment 43 is movably connected to the funnel 30, a movable connection manner between the fixing segment 43 and the funnel 30 may be rotational connection, mobile connection, etc., which is not limited. Due to the fixing segment 43, the scraper 40 is limited. It is ensured that the connecting segment 41 is well connected to the stirring rod 20, and the powder-scraping segment 42 keeps adjacent to or in slight contact with the inner wall of the second accommodating cavity 31, so that the reliability of a powder scraping operation can be ensured.

[0051] Optionally, referring to FIG. 1 to FIG. 4, the powder bucket 100 further includes a limiting structure. The limiting structure is disposed on the outer surface of the bucket body 10 close to the powder outlet 12. The fixing segment 43 is cooperatively connected to the limiting structure.

[0052] The fixing segment 43 is movably connected to the outer surface of the bucket body 10. Optionally, the fixing segment 43 is rotatable around the bucket body 10 under the limitation of the limiting structure and the bucket body 10, and a rotation axis of the fixing segment 43 is substantially a rotation axis of the stirring rod 20. The structure of the limiting structure is not limited. By providing the limiting structure, the fixing segment 43 is cooperatively connected to the limiting structure. The limiting structure has a function of limiting, and ensures that the fixing segment 43 will not be separated from the bucket body 10 and the fixing segment 43 is movably connected to the bucket body 10. The limiting structure limits the scraper 40, fixes a posture of the scraper 40, so that the scraper 40 can scrape off the powder on the inner wall of the funnel 30.

[0053] Optionally, referring to FIG. 1 to FIG. 4, the limiting structure includes a circlip 51. The circlip 51 is snapped to the outer surface of the bucket body 10 close to the powder outlet 12. The fixing segment 43 is wound around the bucket body 10 and located at one side of the circlip 51 away from the powder outlet 12. By providing the circlip 51, the fixing segment 43 can be avoided from moving downwards and separating from the bucket body 10.

[0054] Optionally, the limiting structure further includes a washer 52. The washer 52 is sleeved on the bucket body 10 and located between the circlip 51 and the fixing segment 43.

[0055] The circlip 51 has elasticity. Installation or disassembly of the circlip 51 with the bucket body 10 can be achieved by elastic deformation. The washer 52 has wear resistance. The washer 52 is disposed between the circlip 51 and the fixing segment 43, so that severe wear caused by the direct contact between the fixing segment 43 and the circlip 51 can be avoided, and the smoothness of relative rotation between the fixing segment 43 and the bucket body 10 can be improved.

[0056] The fixing segment 43 may be sleeved on the outer surface of the bucket body 10 at the conical structure 14. The diameter of the conical structure 14 at one end of the conical structure 14 close to the powder leakage port 32 is small, and gradually increases in the direction away from the powder leakage port 32. The fixing segment 43 can be designed to be substantially annular, and the inner diameter of the fixing segment 43 is larger than the outer diameter of the conical structure 14 at one end of the conical structure 14 close to the powder leakage port 32, and smaller than the outer diameter of the conical structure 14 at a position where the conical structure 14 has the maximum outer diameter (for example, the position where the conical structure 14 is connected to the column structure 15), so that the outer surface of the conical structure 14 can limit the fixing segment 43. The fixing segment 43 is sleeved on the conical structure 14 from one end of the conical structure 14 close to the powder leakage port 32, and abuts against the outer surface of the conical structure 14 at a certain position of the conical structure 14 and cannot move further towards the other end of the conical structure 14 away from the powder leakage port 32.

[0057] The circlip 51 and the washer 52 may be disposed on the outer surface of the conical structure 14, and the inner diameter of the fixing segment 43 may have a certain reasonable value. Therefore, in the axial direction of the stirring rod 20, one end of the fixing segment 43 away from the powder leakage port 32 is limited by the outer surface of the conical structure 14, the other end of the fixing segment 43 close to the powder leakage port 32 is limited by the circlip 51 and the washer 52, and the fixing segment 43 is rotatable relative to the conical structure 14 at the position where the fixing segment 43 is limited.

[0058] Optionally, at the outer surface of the bucket body 10, the bucket body 10 may further has a limiting surface 16 and defines a mounting groove 17 that both surround the bucket body 10. The limiting surface 16 faces the powder leakage port 32. The mounting groove 17 is located at one side of the limiting surface 16 close to the powder leakage port 32 and is located near the limiting surface 16. The circlip 51 is sleeved in the mounting groove 17 and extends out of the outer surface of the bucket body 10. The limiting surface 16 is opposite to the circlip 51 and the washer 52. The limiting surface 16, the circlip 51, and the washer 52 cooperatively define an annular groove. The fixing segment 43 is accommodated in the annular groove. In this way, with the mounting groove 17, the circlip 51 can be stably snapped to the bucket body 10, thereby playing a basic supporting role. With the limiting surface 16, the fixing segment 43 can be accommodated in the annular groove, thereby improving the limiting effect.

[0059] Optionally, referring to FIG. 1 to FIG. 4, the powder-scraping segment 42 is deviated from the stirring rod 20. An inclination angle of the powder-scraping segment 42 relative to the axis of the stirring rod 20 is equal to an inclination angle of the inner wall of the second accommodating cavity 31 relative to the axis of the stirring rod.

[0060] The funnel 30 is in a circular conical shape. The shape of the powder-scraping segment 42 matches the shape of the inner wall of the funnel 30 in a longitudinal cross-sectional view. For example, as illustrated in FIG. 2, in a longitudinal cross-sectional view, the inner wall of the funnel 30 is linear, and the powder-scraping segment 42 is substantially in a rod shape extending linearly. The inclination angle of the powder-scraping segment 42 relative to the axis of the stirring rod 20 is equal to the inclination angle of the inner wall of the second accommodating cavity 31 relative to the axis of the stirring rod 20, so that the powder-scraping segment 42 can be adjacent to or in contact with the funnel 30, and the powder at various positions of the inner wall of the second accommodating cavity 31 can be scraped off, thereby avoiding powder residue.

[0061] It may be understood that, since the powder outlet 12 is located between the connection between the funnel 30 and the bucket body 10 and the powder leakage port 32, most of the powder discharged from the powder outlet 12 is scattered downwards (that is, in a direction close to the powder leakage port 32), and the inner wall of the funnel 30, mainly a part of the inner wall below a position of the inner wall flush with the powder outlet 12, may carry the powder. Therefore, one end of the powder-scraping segment 42 away from the powder leakage port 32 may be at least disposed at a position where the inner wall of the funnel 30 is flush with the powder outlet 12. In order to provide redundancy, the powder-scraping segment 42 may be disposed further above the position where the inner wall of the funnel 30 is flush with the powder outlet 12 (that is, in a direction away from the powder leakage port 32), and close to the connection between the funnel 30 and the bucket body 10. In this way, it can be ensured that the powder carried at various positions of the inner wall of the funnel 30 can be scraped off by the powder-scraping segment 42.

[0062] Optionally, referring to FIG. 2 and FIG. 3, the stirring rod 20 extends out of the bucket body 10 from the powder outlet 12 and extends into the second accommodating cavity 31. The scraper 40 is connected to a part of the stirring rod 20 extending out of the bucket body 10. In this way, it is easier for the scraper 40 to be connected to the stirring rod 20, so that the stirring rod 20 can drive the scraper 40 to rotate.

[0063] Optionally, referring to FIG. 1 to FIG. 4, the stirring rod 20 is movable in an axial direction of the stirring rod 20. The stirring rod 20 defines a slot 21 in the axial direction of the stirring rod 20 at one end of the stirring rod 20 extending out of the powder port 12. One end of the connecting segment 41 away from the powder-scraping segment 42 extends into the slot 21. An inner wall of the slot 21 in the axial direction of the stirring rod 20 is spaced apart from the connecting segment 41.

[0064] The connecting segment 41 may be in contact with or spaced apart from at least one of two sidewalls of the slot 21 in the radial direction of the stirring rod 20, so that when the stirring rod 20 rotates, the connecting segment 41 can be driven to rotate, and thus the entire scraper 40 can be driven to rotate. The opening degree of the powder outlet 12 can be controlled by movement of the stirring rod 20 in the axial direction of the stirring rod 20. In order to avoid the movement of the scraper 40 in the axial direction of the stirring rod 20 following the movement of the stirring rod 20 in the axial direction of the stirring rod 20, which affects the operating stability of the scraper 40, and in order to avoid the scraper 40 from obstructing the movement of the stirring rod 20 in the axial direction of the stirring rod 20, the slot 21 is defined in the stirring rod 20, and the inner wall of the slot 21 in the axial direction of the stirring rod 20 is spaced apart from the connecting segment 41. In other words, the stirring rod 20 does not have a transmission relationship with the connecting segment 41 in the axial direction at any position where the stirring rod 20 moves in the axial direction of the stirring rod 20. The stirring rod 20 can only drive the scraper 40 to rotate around the axis of the stirring rod 20, but cannot drive the scraper 40 to move in the axial direction of the stirring rod 20. Therefore, it is ensured that the position and movement of the scraper 40 are stable, and the operation of the stirring rod 20 is also stable.

[0065] Optionally, referring to FIG. 3 and FIG. 4, the fixing segment 43 has one end connected to the connecting segment 41, and the other end connected to the powder-scraping segment 42. The connecting segment 41 is adjacent to the powder-scraping segment 42. The scraper 40 further includes a connecting member 44. The connecting segment 41 and the powder-scraping segment 42 are connected and fixed to the connector 44.

[0066] At least a part of the connecting segment 41 extends in the same direction as the powder-scraping segment 42, so that the connecting segment 41 and the powder-scraping segment 42 can be adjacent to each other at a certain position. The connecting member 44 may be any feasible structure such as a buckle, a clip, etc., so that the connecting member 44 is connected and fixed to the powder-scraping segment 42. In this way, the connecting segment 41 can drive the powder-scraping segment 42 to rotate through the fixing segment 43, and the connecting segment 41 can also drive the powder-scraping segment 42 to rotate through the connecting member 44, so that the overall structural strength and stability of the scraper 40 are improved, and the reliability of the powder scraping operation and the service life of the scraper 40 are improved.

[0067] Optionally, referring to FIG. 2 to FIG. 4, the scraper 40 further includes a guiding segment 45. The guiding segment 45 is connected to one end of the powder-scraping segment 42 away from the connecting segment 41. The guiding segment 45 is located at the powder leakage port 32. At least a part of the guiding segment 45 extends out of the funnel 30 from the powder leakage port 32. The part of the guiding segment 45 extending out of the funnel 30 extends in an axial direction of the stirring rod 20.

[0068] An extension direction of the guiding segment 45 may be substantially the axial direction of the stirring rod 20. The guiding segment 45 can guide the powder discharging direction. When the opening dimension of the container is relatively small, the guiding segment 45 can extend into the container through the opening of the container, so that the powder can enter the container along the guiding segment 45. In this way, it is compatible with the feeding of the container having a relatively small opening dimension.

[0069] Optionally, referring to FIG. 1 and FIG. 5, the stirring rod 20 includes a blocking segment 22 and a powder-outlet segment 23. The blocking segment 22 is connected to one end of the powder-outlet segment 23 close to the powder leakage port 32. The blocking segment 22 has a diameter equal to a caliber of the powder outlet 12. At least a part of the powder-outlet segment 23 has a radial dimension smaller than the caliber of the powder outlet 12.

[0070] The shape of an outer circumferential surface of the blocking segment 22 is adapted to the shape of an inner wall of the powder outlet 12. For example, in the radial direction of the stirring rod 20, both a cross section of the blocking segment 22 and a cross section of the powder outlet 12 are circular. The shape of the outer circumferential surface of the powder-outlet segment 23 is at least partially not adapted to the shape of the inner wall of the powder outlet 12. The shape and structure of the outer circumferential surface of the powder-outlet segment 23 and the shape and structure of the inner wall of the powder outlet 12 can be designed according to needs, which are not limited. The blocking segment 22 and the powder-outlet segment 23 are provided, and the blocking segment 22 and the powder-outlet segment 23 follows the stirring rod 20 to move in the axial direction of the stirring rod 20, so that one of the blocking segment 22 and the powder-outlet segment 23 is located at the powder outlet 12. When the blocking segment 22 is located at the powder outlet 12, the blocking segment 22 can block the powder outlet 12, so that the opening degree of the powder outlet 12 is 0. When the powder-outlet segment 23 is located at the powder outlet 12, the powder-outlet segment 23 can make the opening degree of the powder outlet 12 to be greater than 0, and different opening degrees of the powder outlet 12 can be adjusted by adjusting different positions of the powder-outlet segment 23 relative to the powder outlet 12, thereby realizing different powder discharging speeds.

[0071] Optionally, referring to FIG. 5, an outer circumferential surface of the powder-outlet segment 23 includes a powder-outlet surface 231. At least a part of a region of the powder-outlet surface 231 has an angle relative to the axis of the stirring rod 20. One end of the powder-outlet surface 231 away from the blocking segment 22 is closer to the axis of the stirring rod 20 than one end of the powder-outlet surface close to the blocking segment 22.

[0072] The powder-outlet surface 231 may be a flat surface, a curved surface, a combination of a flat surface and a flat surface, a combination of a flat surface and a curved surface, etc., which is not limited. The entire powder-outlet surface 231 may be inclined relative to the axis of the stirring rod 20, so that when different positions of the powder-outlet surface 231 are located at the powder outlet 12, the dimension of the opening defined by the powder-outlet surface 231 and the inner wall of the powder outlet 12 is variable, so as to adjust the opening degree of the powder outlet 12. Alternatively, one part of the region of the powder-outlet surface 231 may be inclined relative to the axis of the stirring rod 20, and the other part of the region of the powder-outlet surface 231 may be parallel to the axis of the stirring rod 20, so that the dimension of the opening defined by the powder-outlet surface 231 and the inner wall of the powder outlet 12 is adjustable first and then remain unchanged, which can reduce the precision requirement for moving the stirring rod 20 in the axial direction of the stirring rod 20.

[0073] Optionally, referring to FIG. 1 and FIG. 5, the stirring rod 20 further includes a main-body segment 24 and an extrusion segment 25. The main-body segment 24 is connected to one end of the powder-outlet segment 23 away from the blocking segment 22. The extrusion segment 25 is connected to an end portion of the main-body segment 24 close to the powder-outlet segment 23, or the extrusion segment 25 is connected to the powder-outlet segment 23. The extrusion segment 25 protrudes from an outer surface of the main-body segment 24. The extrusion segment 25 has an extrusion surface 251 facing the powder-outlet segment 23. The extrusion surface 251 has an angle relative to each of the axial direction of the stirring rod 20 and a circumferential direction of the stirring rod 20.

[0074] The extrusion segment 25 may be of any feasible shape and structure, which is not limited. The extrusion segment 25 protrudes from the outer surface of the main-body segment 24, or protrudes from an outer surface of the powder-outlet segment 23, so that the extrusion segment 25 can stir the powder in the bucket body 10. The extrusion segment 25 and the main-body segment 24 may form an integrated structure, or may form a split structure connected by means of snap connection, screw connection, etc., which is not limited. The extrusion surface 251 may be a flat surface, a curved surface, etc., which is not limited. The extrusion surface 251 is inclined relative to the axis of the stirring rod 20, and has an angle relative to each of the axial direction of the stirring rod 20 and a circumferential direction of the stirring rod 20, and the extrusion surface 251 faces the powder-outlet segment 23. Therefore, when the stirring rod 20 drives the extrusion segment 25 to stir the powder, the extrusion surface 251 can exert a pressure on the powder towards the powder-outlet segment 23, so that the powder moves towards the powder-outlet segment 23, and thus the powder flows out of the powder outlet 12 more smoothly. Optionally, an orientation of the extrusion surface 251 is also adapted to a rotation direction of the stirring rod 20, so that the extrusion surface 251 can generate a pushing force on the powder in both the rotation direction of the stirring rod 20 and the axial direction of the stirring rod 20, thereby facilitating powder discharging.

[0075] Optionally, referring to FIG. 5, the extrusion surface 251 further extends to the powder-outlet surface 231 of the powder-outlet segment 23, and is smoothly connected to the powder-outlet surface 231. The extrusion surface 251 has an obtuse angle relative to the powder-outlet surface 231.

[0076] The extrusion surface 251 is smoothly connected to the powder-outlet surface 231, so that a stress concentration at a connection between the extrusion surface 251 and the powder-outlet surface 231 can be avoided, the structural strength of the stirring rod 20 is improved, and the powder is also avoided from being blocked at the connection between the extrusion surface 251 and the powder-outlet surface 231.

[0077] For an embodiment in which both the extrusion surface 251 and the powder-outlet surface 231 are flat surfaces, the extrusion surface 251 and the powder-outlet surface 231 may directly define an obtuse angle therebetween. For an embodiment in which at least one of the extrusion surface 251 and the powder-outlet surface 231 is a curved surface, an angle measurement may be performed on a tangent plane at any point on the curved surface and another tangent plane at any point on another flat surface or curved surface. In other words, the extrusion surface 251 and the powder-outlet surface 231 cooperatively define a V-shaped groove. An angle between the extrusion surface 251 and the powder-outlet surface 231 is an opening angle of the V-shaped groove. The opening angle is an obtuse angle. The value of the obtuse angle is not limited. For example, the obtuse angle is 120. Further, each of the extrusion surface 251 and the powder-outlet surface 231 has an angle relative to the axis of the stirring rod 20. For example, the angle may be 30, 45, or other angle values, which is not limited. The extrusion surface 251 and the powder-outlet surface 231 define the obtuse angle therebetween, so that the extrusion surface 251 and the powder-outlet surface 231 each have a relatively long extension length along the axis of the stirring rod 20, and thus the stirring rod 20 can move a relatively long distance in the axial direction of the stirring rod 20, thereby adjusting the powder outlet 12 in different opening degrees. In addition, the extrusion segment 25 can extrude the powder, so that the powder can be collected to the powder-outlet surface 231 more smoothly.

[0078] Optionally, referring to FIG. 1 and FIG. 3, the bucket body 10 further includes a cover opening 13. The cover opening 13 and the powder outlet 12 are located at two ends of the bucket body 10 in an axial direction of the stirring rod 20, respectively. The powder bucket 100 further includes a cover body 60, an elastic structure 70, and a butt joint 80. The cover body 60 covers the cover opening 13. The elastic structure 70 is connected to the cover body 60 and the stirring rod 20. The stirring rod 20 is movably connected to the cover body 60. The butt joint 80 is connected to one end of the stirring rod 20 away from the powder outlet 12.

[0079] Optionally, the cover body 60 includes a cover plate 61 and an extension structure 62. The cover plate 61 covers the cover opening 13. The extension structure 62 is connected to the cover plate 61. The extension structure 62 protrudes from one side of the cover plate 61 close to the powder outlet 12. The extension structure 62 and the cover plate 61 cooperatively define a collapsible chamber 621. The elastic structure 70 is accommodated in the collapsible chamber 621.

[0080] The cover plate 61 is substantially in a plate shape. The shape of a peripheral side surface of the cover plate 61 is the same as the shape of an inner wall of the cover opening 13. Each of the shape of the peripheral side surface of the cover plate 61 and the shape of the inner wall of the cover opening 13 may be circular or non-circular. When the cover plate 61 covers the cover opening 13, the peripheral side surface of the cover plate 61 are closely attached to the inner wall of the cover opening 13, so that the cover plate 61 and the bucket body 10 are fixed relative to each other in both the circumferential direction of the stirring rod 20 and the axial direction of the stirring rod 20. The bucket body 10 can limit the rotation and movement of the cover body 60 relative to the bucket body 10.

[0081] The cover plate 61 may define a powder inlet 611. The powder inlet 611 is in communication with the first accommodating cavity 11. The powder can be added into the bucket body 10 through the powder inlet 611. After the powder is added, the powder inlet 611 can be sealed. The cover plate 61 may further define a first mounting hole 612 that is spaced apart from the powder inlet 611. The first mounting hole 612 is directly opposite to the powder outlet 12 in the axial direction of the stirring rod 20. The extension structure 62 is connected around the periphery of the first mounting hole 612. The first mounting hole 612 is in communication with the collapsible chamber 621. The extension structure 62 may be a tubular structure with openings at two ends of the extension structure 62. An opening at one end of the extension structure 62 close to the cover plate 61 is in communication with the first mounting hole 612. The extension structure 62 defines a second mounting hole 622 at one end of the extension structure 62 close to the powder outlet 12. The second mounting hole 622 is directly opposite to the powder outlet 12 in the axial direction of the stirring rod 20. The second mounting hole 622 is in communication with the collapsible chamber 621.

[0082] The elastic structure 70 may include a spring 71, a slider 72, or other structures, which is not limited. A structure of the butt joint 80 is not limited. Optionally, referring to FIG. 1 and FIG. 6, the stirring rod 20 defines a fitting groove 81 at one end of the butt joint 80 away from the stirring rod 20. A cross section of the fitting groove 81 is non-circular, and specifically, may be a regular polygon. The fitting groove 81 can cooperate with the driving device 200. The driving device 200 can extend into the fitting groove 81 to drive the butt joint 80 to rotate, thereby driving the stirring rod 20 to rotate. Therefore, other connecting structures are not required, and the structure is simple and is easy to operate.

[0083] With reference to FIG. 1 and FIG. 5, the stirring rod 20 passes through the first mounting hole 612 and the second mounting hole 622. Specifically, the main-body segment 24 of the stirring rod 20 passes through the first mounting hole 612 and the second mounting hole 622. The butt joint 80 is connected to one end of the main-body segment 24 away from the powder-outlet segment 23. The connection manner between the butt joint 80 and the end of the main-body segment 24 away from the powder-outlet segment 23 may be screw connection, snap connection, etc., which is not limited. The elastic structure 70 has one end elastically abutting against the extension structure 62, and the other end abutting against the butt joint 80. The elastic structure 70 stays in a compressed state, and acts on the butt joint 80 through elastic tension to drive the stirring rod 20, so that the stirring rod 20 has a tendency to move towards the cover plate 61. The main-body segment 24 may be further provided with a limiting boss 62 around the outer periphery of the main-body segment 24. The limiting boss 26 can abut against the extension structure 62 and limit the displacement of the stirring rod 20 towards the cover plate 61.

[0084] The stirring rod 20 may further be connected to a stirring blade 27. The stirring blade 27 may be a bent rod-shaped member, a spiral rod-shaped member, or have multiple blade-shaped structures, which is not limited.

[0085] When the powder discharging operation is not performed, under the elastic tension of the elastic structure 70, the blocking segment 22 of the stirring rod 20 blocks the powder outlet 12. When the powder discharging operation is performed, the driving device 200 cooperates with the butt joint 80 and provides a rotation force and a downward pressure. The stirring rod 20 rotates under the rotation force from the driving device 200. The stirring blade 27 rotates following the rotation of the stirring rod 20 to stir the powder in the bucket body 10, and the extrusion segment 25 can exert a downward pressure to drive the powder to move towards the powder outlet 12. When the stirring rod 20 is pressed downwards, the elastic structure 70 is further compressed, the blocking segment 22 extends out of the bucket body 10, and the powder-outlet segment 23 is located at the powder outlet 12, so that the powder-outlet segment 23 can adjust the opening degree of the powder outlet 12, thereby discharging the powder.

[0086] Optionally, referring to FIG. 3 and FIG. 7, the powder bucket 100 further includes a locking mechanism 90. The locking mechanism 90 is disposed at the bucket body 10 and/or the cover body 60, so that the bucket body 10 is detachably connected to the cover body 60.

[0087] The locking mechanism 90 may be any feasible structure, such as a plunger, a buckle, etc., which is not limited. The locking mechanism 90 can fix the cover body 60 and the bucket body 10 relative to each other in the axial direction of the stirring rod 20, so as to avoid the movement of the cover body 60 following the movement of the stirring rod 20 in the axial direction of the stirring rod 20. The locking mechanism 90 may fix or dissemble the bucket body 10 and the cover body 60 relative to each other in any feasible manner, which is not limited. Exemplarily, as illustrated in FIG. 3 and FIG. 7, the locking mechanism 90 includes two plungers. The plungers are spaced apart from each other. When each plunger passes through both the bucket body 10 and the cover body 60, the bucket body 10 and the cover body 60 are fixed relative to each other in the axial direction of the stirring rod 20. When each plunger passes through one of the bucket body 10 and the cover body 60 and does not pass through the other of the bucket body 10 and the cover body 60, the bucket body 10 and the cover body 60 are not fixed in the axial direction of the stirring rod 20, and can be separated and dissembled. The cover body 60 and the bucket body 10 are detachably connected to each other, so that the powder bucket 100 can be easily assembled. Optionally, the cover body 60 defines an assembling groove (not illustrated in the figures) at two opposite sides of the cover body 60. Each plunger is disposed in one assembling groove. A ball of the plunger can extend out of the assembling groove without the action of an external force, and can retract into the assembling groove under the action of the external force. When the bucket body 10 is fixed and connected to the cover body 60, the ball of the plunger extends out of the assembling groove and is snap-fitted with the bucket body 10. When the ball of the plunger retracts into the assembling groove under the action of the external force, the cover body 60 can be separated from the bucket body 10.

[0088] Optionally, in other embodiments, referring to FIG. 8 to FIG. 10, different from the structure in which the inclination angle of the powder-scraping segment 42 relative to the axis of the stirring rod 20 is equal to the inclination angle of the inner wall of the second accommodating cavity 31 relative to the axis of the stirring rod 20, the powder-scraping segment 42 may extend in a spiral with a centerline of the spiral being the axis of the stirring rod 20.

[0089] Optionally, the connecting segment 41 of the stirring rod 40 is connected and fixed to the end of the stirring rod 20 extending out of the bucket body 10, and the powder-scraping segment 42 is directly connected to the connecting segment 41. Therefore, there is no need to make the fixing segment 43 be movably connected to the outer surface of the bucket body 10, and there is also no need to define the slot 21 at the end of the stirring rod 20 extending out of the bucket body 10. The powder-scraping segment 42 extends in a spiral, and at least a part of the powder-scraping segment 42 is also adjacent to or in contact with the inner wall of the funnel 30, so that the powder on the inner wall of the funnel 30 can be scraped off. In addition, the scraper 40 is connected and fixed to the stirring rod 20, and when the stirring rod 20 moves in the axial direction of the stirring rod 20, the scraper 40 moves synchronously, so that an operating area of the powder-scraping segment 42 on the inner wall of the funnel 30 can be increased, and a powder-scraping effect is better. In order to further improve the powder-scraping effect, a vertical distance (that is, pitch) between any two adjacent threads of the spirally powder-scraping segment 42 is smaller than a downward pressing travel of the stirring rod 20 when powder is discharged. Optionally, the variation of the circumferential dimension of the spirally powder-scraping segment 42 is substantially equal to the variation of the inner diameter of the funnel 30, so as to increase an area of the powder-scraping segment 42 adjacent to or in contact with the inner wall of the funnel 30 as much as possible.

[0090] Optionally, referring to FIG. 8, the powder bucket 100 further includes a conduit 35. The conduit 35 is connected to the funnel 30. The conduit 35 has a central hole 351 in communication with the powder leakage port 32. The conduit 35 extends in an axial direction of the stirring rod 20.

[0091] The connection manner between the conduit 35 and the funnel 30 may be any feasible connection manner such as screw connection, snap connection, etc., which is not limited. The conduit 35 has a straight rod-shaped structure, and extends in a direction of the stirring rod 20 and away from the funnel 30. After the powder is leaked from the powder leakage port 32, the powder is delivered in the central hole 351 of the conduit 35. During feeding, the axial direction of the stirring rod 20 can be the vertical direction, so that the powder falls down in the vertical direction when the powder is delivered in the central hole 351, and sticking of the powder to the inner wall of the conduit 35 can be avoided as much as possible. The outer diameter of the conduit 35 may be substantially equal to the diameter of the powder leakage port 32. One end of the conduit 35 away from the funnel 30 may extend into a container having a smaller dimension or a deeper container. For example, the end of the conduit 35 away from the funnel 30 may extend into a capsule test tube, so that a container having an extremely small dimension can be fed. For another example, the end of the conduit 35 away from the funnel 30 may extend into a volumetric flask, so that powder is avoided from sticking to the inner wall of the volumetric flask.

[0092] Optionally, referring to FIG. 8 and FIG. 11, there are multiple extrusion segments 25. The multiple extrusion segments 25 are arranged at intervals in the axial direction of the stirring rod 20. In a direction from the main-body segment 24 to the blocking segment 22, a radial dimension of the multiple extrusion segments 25 protruding from the main-body segment 24 decreases gradually. In a radial direction of the stirring rod 20, a radial dimension of a part of one of the multiple extrusion segments 25 that is closest to the blocking segment 22 and protrudes from the main-body segment 24 is not larger than a maximum radial dimension of a part of the powder-outlet segment 23 protruding from the main-body segment 24.

[0093] The multiple extrusion segments 25, and the main-body segment 24 and/or the powder-outlet segment 23, may form an integrated structure, or may form a split structure connected by means of snap connection, screw connection, etc., which is not limited. In the embodiments, the powder-outlet segment 23 can have one or more powder-outlet surfaces 231.

[0094] When there are multiple powder-outlet surfaces 231, the multiple powder-outlet surfaces 231 are arranged at intervals in a circumferential direction of the powder-outlet segment 23. Multiple extrusion segments 25 may be correspondingly disposed on the same powder-outlet surface 231 of the multiple powder-outlet surfaces 231, and an extrusion segment(s) 25 may or may not disposed on the other powder-outlet surfaces 231 of the multiple powder-outlet surfaces 231. The radial dimension of the multiple extrusion segments 25 protruding from the main-body segment 24 decreases gradually, and thus can be adapted to a conical shape of the conical structure 14 of the bucket body 10. The radial dimension of the part of the extrusion segment 25 that is closest to the blocking segment 22 and protrudes from the main-body segment 24 is not larger than the maximum radial dimension of the part of the powder-outlet segment 23 protruding from the main-body segment 24, so that the extrusion segment 25 closest to the blocking segment 22 can extend into the powder outlet 12, to press downwards and stir the powder at the powder outlet 12, thereby avoid the powder from blocking the powder outlet 12.

[0095] Optionally, referring to FIG. 8, the extension structure 62 protrudes from one side of the cover plate 61 away from the powder outlet 12. The extension structure 62 may be a tubular structure with openings at two ends of the extension structure 62. The extension structure 62 has one end connected to the cover plate 61, and the other end extending in a direction away from the funnel 30. The elastic structure 70 includes a spring 71 and a slider 72. The slider 72 is connected and fixed to one end of the stirring rod 20 close to the butt joint 80. The spring 71 has one end abutting against the cover plate 61, and the other end in contact with the slider 72. The slider 72 is slidable relative to the inner wall of the extension structure 62 in both the axial direction of the stirring rod 20 and the circumferential direction of the stirring rod 20.

[0096] Optionally, referring to FIG. 8 to FIG. 10, a communication opening 18 is defined at a connection between the bucket body 10 and the funnel 30. The communication opening 18 is used for communicating the second accommodating cavity 31 with the outside.

[0097] The communication opening 18 may be defined at the bucket body 10 or the funnel 30, or may be defined at both the bucket body 10 and the funnel 30. The communication opening 18 is not in communication with the first accommodating cavity 11 of the bucket body 10, so as to avoid the external air from entering the first accommodating cavity 11 and thus avoid the powder from moisture and oxidation. The communication opening 18 is in communication with the second accommodating cavity 31 of the funnel 30, so that the second accommodating cavity 31 can be in communication with the outside through the communication opening 18, and the air pressure in the second accommodating cavity 31 is equal to the air pressure outside, thereby avoiding a negative pressure in the second accommodating cavity 31 and avoiding affecting powder to be discharged from the powder leakage port 32. The communication opening 18 is defined at the connection between the bucket body 10 and the funnel 30, so that there is no powder at the connection, thereby avoiding the powder from leaking out from the communication opening 18 and avoiding affecting the precision of powder dispensing.

[0098] In the description of the embodiments of the present disclosure, it may be noted that, the orientation or positional relationship indicted by terms such as center, on, under, left, right, vertical, horizontal, in, out, and the like are orientations or positional relationship based on the accompanying drawings and are only for the convenience of description and simplicity, rather than explicitly or implicitly indicate that devices or components referred to herein must have a certain orientation or be configured or operated in a certain orientation and therefore cannot be understood as limitations to the present disclosure.

[0099] The above embodiments are only some preferred embodiments of the present disclosure, and cannot be used to limit the scope of the present disclosure. Those of ordinary skill in the art can understand all or a part of the process to realize the above embodiments of the present disclosure, and the equivalent changes made in accordance with the claims of the present disclosure still belong to the scope of the present disclosure.