HAND-OPERATED JUICER, DRIVE SCREW AND JUICING ASSEMBLY

Abstract

Disclosed are a hand-operated juicer, a drive screw capable of rotating around an axis of the drive screw and moving forward and backward, and a juicing assembly of the hand-operated juicer. The juicing assembly includes a juicing head, and a juicing cover connected to a shell. The juicing head is capable of being accommodated in a squeezing cavity, an outer surface of the juicing head is an arc-shaped surface and is provided with a plurality of outer convex ribs, and the juicing cover is provided with an arc-shaped concave juicing head capable of accommodating the squeezing cavity. The drive screw rotates towards a front end for squeezing in the juicing process, thereby achieving the effects of more complete juicing, high juice yield and labor-saving operation. It is unnecessary to peel fruit, thereby facilitating the juicing operation.

Claims

1. A hand-operated juicer, comprising: a shell; a juicing head, wherein an outer surface of the juicing head is an arc-shaped surface and is provided with a plurality of outer convex ribs, and an inserting rod for hanging fruit is arranged at the transverse top of the juicing head; a juicing cover, connected to the shell, wherein the juicing cover is provided with an arc-shaped concave squeezing cavity, and the squeezing cavity is capable of accommodating the juicing head; and a drive screw, capable of rotating around an axis of the drive screw and moving forward and backward, wherein a rear end of the drive screw is connected to an operator handle, and the juicing head is connected to a front end of the drive screw and capable of rotating along with the drive screw and moving forward and backward.

2. The hand-operated juicer according to claim 1, further comprising: a clamping connection piece capable of sliding left and right, wherein the clamping connection piece is provided with a small hole part and a big hole part which communicate with each other, the drive scree passes through the small hole part, a hole wall of the small hole part is clamped into a thread groove of the drive screw to achieve threaded fit, and when the drive screw moves backward, the drive screw is capable of passing through the big hole part and a hole wall of the big hole part is unable to be clamped into the thread groove of the drive screw.

3. The hand-operated juicer according to claim 1, wherein several inner convex ribs extending from a middle part of the squeezing cavity to an edge are arranged on an inner wall of the squeezing cavity, and the inner convex ribs are distributed uniformly along the inner wall of the squeezing cavity.

4. The hand-operated juicer according to claim 3, wherein an transition convex rib is arranged between two adjacent ones of the inner convex ribs, and the inner convex ribs and the transition convex rib are provided with clamping thorns.

5. The hand-operated juicer according to claim 3, wherein the juicing cover is hinged on the shell; when the inserting rod abuts against the inner wall of the squeezing cavity, a gap is still present between the inner convex ribs and the outer convex ribs; and when the squeezing cover is overturned and opened, an end part of the inserting rod passes through a sliding groove between two adjacent ones of the inner convex ribs and is capable of sliding out of the sliding groove.

6. The hand-operated juicer according to claim 3, wherein an inner end of each of the inner convex ribs has a certain distance from a center point of the squeezing cavity, so that an accommodating cavity is surrounded by the inner ends of the inner convex ribs, and the accommodating cavity is capable of accommodating the end part of the inserting rod.

7. The hand-operated juicer according to claim 1, wherein each of the outer convex ribs extends from the top of the juicing head to an edge of the arc-shaped surface, and a recessed part is arranged between one end, close to the inserting rod, of each of the outer convex ribs and the inserting rod.

8. The hand-operated juicer according to claim 2, wherein one end of the clamping connection piece is connected to a key on the shell, and the other end of the clamping connection piece is provided with a spring that keeps the clamping connection piece moving toward a direction of the key.

9. The hand-operated juicer according to claim 8, a shaft sleeve is fixed in the shell, the drive screw penetrates into the shaft sleeve, and the shaft sleeve is provided with a notch for the small hole part of the clamping connection part to enter therethrough.

10. The hand-operated juicer according to claim 9, wherein a mounting box is fixed in the shell, the key, the clamping connection piece and the spring are arranged in the mounting box, and the shaft sleeve passes through the mounting box.

11. The hand-operated juicer according to claim 2, wherein the small hole part is an arc-shaped clamping groove, the big hole part is a rectangular hole, and the arc-shaped clamping groove is formed in a side wall of one side, close to the spring, of the rectangular hole.

12. The hand-operated juicer according to claim 1, wherein the juicing cup is inserted into a lower part of the shell, and the lower part of the shell is provided with a cup inlet for the juicing cup to move in and out of an inner cavity of the shell.

13. The hand-operated juicer according to claim 1, wherein a lower part of the squeezing cavity is provided with an inclined guide surface for downward guiding juice to the juicing cup.

14. The hand-operated juicer according to claim 1, wherein a lock catch for locking the juicing cover at a closed position is arranged between the juicing cover and the shell.

15. The hand-operated juicer according to claim 1, wherein the drive screw comprises: a screw body, an outer wall of the screw body being provided with an outer thread section formed by several thread grooves; a coil thread insert, rotatably clamped in the thread grooves and exposed out of the thread grooves to form a drive thread; and a limiting joint, formed at a front end of the screw body and limiting and restraining the coil thread insert.

16. The hand-operated juicer according to claim 1, wherein the juicing head further comprises an elastic part arranged in the juicing head, and the elastic part enables the outer surface of the juicing head to retract to a rear side when a squeezing force from a front side is greater than an elastic force of the elastic part.

17. The hand-operated juicer according to claim 16, wherein when the inserting rod does not hang fruit, the juicing cover is closed and the drive screw drives the juicing head to move forward to a limit position, the inserting rod abuts against an inner wall of the squeezing cavity so as to block the juicing head, and the juicing head is rotatable relative to the juicing cover and the elastic part is deformed to make the insert rod apply a thrust to the inner wall of the squeezing cavity.

18. A drive screw, comprising: a screw body, an outer wall of the screw body being provided with an outer thread section formed by several thread grooves; a coil thread insert, partially rotatably clamped in the thread grooves on the outer thread section, wherein a groove width of each of the thread grooves is matched with a width of the coil thread insert, and a depth of each of the thread grooves is less than a thickness of the coil thread insert, so that the coil thread insert is exposed out of the thread grooves to form a drive thread.

19. The drive screw according to claim 18, wherein the coil thread insert comprises a compression section located at a tail part of the coil thread insert, the compression section extends to an insert tail end of the coil thread insert, the compression section is rotatably arranged on the screw body outside the thread grooves, and the compression section is capable of being compressed along an axial direction of the screw body under the condition of being stressed, such that the insert tail end of the coil thread insert is compressed toward the adjacent previous turn of the coil thread insert.

20. The drive screw according to claim 19, wherein an outer end face of the tail end of the coil thread insert is an inclined surface inclining toward the adjacent previous turn of the coil thread insert.

21. The drive screw according to claim 18, wherein the screw body is axially provided with a metal blocking sheet for blocking the tail end of the coil thread insert from screwing in along a circumferential direction.

22. The drive screw according to claim 18, wherein a width of a coil of the last turn of the coil thread insert is less than a width of a coil of the previous turn of the coil thread insert, and a width of a coil of the last turn of the coil thread insert gradually decreases towards a width of the tail end part.

23. The drive screw according to claim 19, further comprising: wherein a surrounding angle of the compression section on the screw body is between 180 degrees and 360 degrees.

24. The drive screw according to claim 21, further comprising: wherein the screw body corresponding to the compression section at the tail end of the coil thread insert is axially provided with an inserting groove, the metal blocking sheet comprises an inserting part and a protruded part, the inserting part is inserted into the inserting groove, the tail end of the coil thread insert is capable of abutting against one side of the protruded part, and the protruded part is capable of blocking the tail end of the coil thread insert from screwing in along the circumferential direction.

25. The drive screw according to claim 24, further comprising: a polished rod body, wherein one end of the polished rod body comprises an abutting end connected to the screw body, and the abutting end abuts against the other side of the protruded part; a metal mandrel, arranged in the screw body and the polished rod body, wherein the metal mandrel, the screw body and the polished rod body integrally form the drive screw through injection molding; and a limiting joint, arranged at an end part of the screw body and limiting and restraining a head end of the coil thread insert.

26. A juicing assembly for a juicer, wherein the juicing assembly comprises a juicing head and a drive screw connected to the juicing head, an outer surface of the juicing head being an arc-shaped surface and being provided with a plurality of outer convex ribs; and the juicing assembly further comprises: an elastic part, arranged in the juicing head or on the drive screw, the elastic part enabling the outer surface of the juicing head to retract to the other side when a squeezing force from one side is greater than an elastic force of the elastic part.

27. The juicing assembly for the juicer according to claim 26, wherein the juicing head is internally provided with an inner cavity, a connecting head is restrained in the concave cavity, the connecting head and the concave cavity are in key groove fit and are capable of sliding forward and backward relatively, a front end of the drive screw is inserted in the connecting head, and the elastic part acts on the connecting head.

28. The juicing assembly for the juicer according to claim 26, wherein the elastic part is located between the juicing head and the drive screw, one end of the elastic part acts on the juicing head, and the other end of the elastic part acts on the drive screw.

29. The juicing assembly for the juicer according to claim 27, wherein a bolt fixing column is arranged in the concave cavity, and the elastic part is sleeved on the bolt fixing column and acts on the drive screw.

30. The juicing assembly for the juicer according to claim 29, wherein a locking piece is arranged in the concave cavity, and the locking piece is connected to the bolt fixing column through a bolt to prevent the connecting head from popping out toward a direction of the drive screw.

31. The juicing assembly for the juicer according to claim 26, wherein an inserting rod for hanging fruit is arranged at the transverse top of the outer surface of the juicing head.

32. The juicing assembly for the juicer according to claim 29, Wherein a reinforcing rib is fixedly connected between an outer wall of the concave cavity and an inner concave surface of the juicing head.

33. The juicing assembly for the juicer according to claim 26, wherein each of the outer convex ribs extends from the top of the juicing head to an edge of the arc-shaped surface, and a recessed part is arranged between one end, close to the inserting rod, of each of the outer convex ribs and the inserting rod.

34. A juicing assembly for a juicer, comprising a juicing head, and further comprising a juicing cover, wherein the juicing cover is provided with an arc-shaped concave squeezing cavity, the squeezing cavity is capable of accommodating the squeezing head, and an inner wall of the squeezing cavity is provided with several inner convex ribs extending from a middle part of the squeezing cavity to the edge.

35. The juicing assembly for the juicer according to claim 34, wherein the inner convex ribs are uniformly distributed along the inner wall of the squeezing cavity, and a transition convex rib is arranged between two adjacent ones of the inner convex ribs.

36. The juicing assembly for the juicer according to claim 35, wherein the transition convex rib and the inner convex ribs are provided with clamping thorns.

37. The juicing assembly for the juicer according to claim 34, wherein an inserting rod for hanging fruit is arranged between the juicing head and the juicing cover; an outer surface of the juicing head is an arc-shaped surface and is provided with a plurality of outer convex ribs; when the inserting rod abuts against the inner wall of the squeezing cavity, a gap is still present between the inner convex ribs and the outer convex ribs; and when the squeezing cover is overturned and opened, an end part of the inserting rod passes through a sliding groove between two adjacent ones of the inner convex ribs and is capable of sliding out of the sliding groove.

38. The juicing assembly for the juicer according to claim 37, wherein an inner end of each of the inner convex ribs has a certain distance from a center point of the squeezing cavity, so that an accommodating cavity is surrounded by the inner ends of the inner convex ribs, and the accommodating cavity is capable of accommodating the end part of the inserting rod.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The drawings of the specification that constitutes a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and the description thereof are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the drawings:

[0070] FIG. 1 is a schematic diagram of a three-dimensional structure of a hand-operated juicer embodiment when a juicing cover is opened;

[0071] FIG. 2 is a schematic diagram of a three-dimensional structure of a hand-operated juicer embodiment when a juicing cover is closed;

[0072] FIG. 3 is a sectional view of the hand-operated juicer embodiment in FIG. 2 along a direction A-A;

[0073] FIG. 4 is a schematic diagram of a three-dimensional structure when a drive screw and a juicing head of a hand-operated juicer do not move forward;

[0074] FIG. 5 is a sectional view along a height direction of a middle part of the hand-operated juicer in FIG. 4;

[0075] FIG. 6 is a sectional view of the hand-operated juicer embodiment in FIG. 2 along a direction B-B;

[0076] FIG. 7 is a schematic diagram of a hole wall of a small hole part of a clamping connection piece in a hand-operated juicer embodiment clamped into a thread groove of a drive screw;

[0077] FIG. 8 is a schematic diagram of a drive screw in a hand-operated juicer embodiment located in a big hole part of a clamping connection piece;

[0078] FIG. 9 is a schematic diagram of a three-dimensional structure of a squeezing cavity of a hand-operated juicer;

[0079] FIG. 10 is a schematic exploded view of connection between a drive screw and a juicing head;

[0080] FIG. 11 is a sectional view of a juicing head embodiment;

[0081] FIG. 12 is an exploded structural schematic diagram of each part of a drive screw;

[0082] FIG. 13 is a structural schematic diagram of a screw body of a drive screw;

[0083] FIG. 14 is a schematic diagram of a mounting structure of a drive screw and an enlarged view of a compression section;

[0084] FIG. 15 is a sectional view of a drive screw embodiment along a length direction and an enlarged view of a compression section;

[0085] FIG. 16 is a three-dimensional schematic diagram of a shaft sleeve in a hand-operated juicer embodiment;

[0086] FIG. 17 is a schematic diagram of a connection structure of a shaft sleeve and a clamping connection piece in a hand-operated juicer embodiment;

[0087] FIG. 18 is a structural schematic diagram of a clamping connection piece in a hand-operated juicer embodiment; and

[0088] FIG. 19 is another setting mode of an elastic part according to an embodiment of the present invention.

DESCRIPTION OF REFERENCE NUMERALS

[0089] 1—shell; 11—cup inlet; 12—front opening; 13—shaft sleeve; 14—mounting box; 131—notch; [0090] 2—juicing head; 21—outer convex rib; 22—inserting rod; 23—recessed part; 24—connecting head; 241—lug part; 25—concave cavity; 26—locking piece; 27—bolt fixing column; 28—reinforcing rib; [0091] 3—juicing cover; 31—squeezing cavity; 32—inner convex rib; 321—sliding groove; 33—clamping thorn; 34—transition convex rib; 35—lock catch; 36—accommodating cavity; 37—guide surface; [0092] 4—juicing cup; [0093] 5—drive screw; 51—screw body; 511—thread groove; 512—inserting groove; 513—limiting plug; 52—polished rod body; 521—abutting end; 522—rear end plug; 53—coil thread insert; 531—compression section; 5311—insert tail end; 54—metal blocking sheet; 541—protruded part; 542—inserting part; 55—metal mandrel; S—drive thread; M—outer end face; [0094] 6—operator handle; [0095] 7—elastic part; [0096] 8—clamping connection piece; 81—small hole part; 82—big hole part; [0097] 9—key; 10—spring.

DETAILED DESCRIPTION OF THE EMBODIMENTS

[0098] The present invention is described in detail below with reference to the accompanying drawings and embodiments. Each example is provided to explain the present invention instead of limiting the present invention. In fact, those skilled in the art will appreciate that modifications and variations may be made in the present invention without departing from the scope or spirit of the present invention. For example, features shown or described as one part of one embodiment may be applied to another embodiment to generate yet another embodiment. Therefore, it is expected that the present invention includes such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0099] In the description of the present invention, orientation or position relationships indicated by terms “longitudinal”, “transverse”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom” and the like are orientation or position relationships shown in the drawings, and these terms are merely for facilitating description of the present invention, but not for requiring that the present invention must be constructed and operated in a specific orientation, and thus, these terms cannot be understood as a limitation to the present invention. As used in the present invention, the terms “connected”, “connection” and “set” should be understood in a broad sense, for example, they may be fixed connection or detachable connection, they may be direct connection or indirect connection through an intermediate part; or they may be wired connection and wireless connection, or may be connection through a wireless communication signal. For those of ordinary skill in the field, the specific meanings of the terms may be understood according to the specific conditions.

[0100] The accompanying drawings show one or a plurality of examples of the present invention. The detailed description uses reference numerals and letters to refer to the features in the accompanying drawings. Similar numeral references in the drawings and description have been used to refer to the similar parts in the present invention. As used herein, the terms “first”, “second” and “third” are used interchangeably to distinguish one component from another component, and are not intended to indicate the position or importance of individual components.

Embodiment 1

[0101] As shown in FIG. 1 to FIG. 11 and FIG. 16 to FIG. 18, they are a preferred embodiment of the present invention.

[0102] A hand-operated juicer includes a shell 1 with an inner cavity, and a suction disk is arranged at the bottom of the shell 1, thereby facilitating firm fixation with a table surface.

[0103] A juicing head 2 is arranged in the shell 1, a juicing cover 3 is hinged on a front opening 12 of the shell 1, a lock catch 35 for locking the juicing cover 3 at a closed position is arranged between the juicing cover 3 and the shell, an outer surface of the juicing head 2 is an arc-shaped surface and is provided with a plurality of outer convex ribs 21, and an inserting rod 22 for hanging fruits is arranged at the top of the juicing head 2 transversely; and the outer convex ribs 21 extend from the top of the juicing head to an edge of the arc-shaped surface, and a recessed part 23 is arranged between one end, close to the inserting rod 22, of each of the outer convex ribs 21 and the inserting rod 22. The juicing head 2 further includes an elastic part 7 that is arranged in the juicing head 2. The elastic part 7 enables the outer surface of the juicing head 2 to retract to a rear side when a squeezing force from a front side is greater than an elastic force of the elastic part 7. When the inserting rod 22 does not hung fruits and the juicing cover 3 is closed, a drive screw 5 drives the juicing head 2 to move forward to a limit position, the inserting rod 22 abuts against an inner wall of the squeezing cavity 31 so as to block the juicing head 2; moreover, the juicing head 2 can rotate relative to the juicing cover 3, and the elastic part 7 is deformed to make the inserting rod 22 apply a thrust to the inner wall of the squeezing cavity 31.

[0104] The juicing cover 3 is connected to the shell 1, the juicing cover 3 is provided with an arc-shaped concave squeezing cavity 31, and the juicing head 2 can be accommodated in the squeezing cavity 31.

[0105] The drive screw 5 can rotate around the own axis and can move forward and backward, a rear end of the drive screw 5 is connected to an operator handle 6, and the juicing head 2 is connected to a front end of the drive screw 5 and can rotate along with the drive screw and move forward and backward.

[0106] A juicing cup 4 is inserted in a lower part of the shell 1. A cup inlet 11 for the juicing cup to move in and out of an inner cavity of the shell is arranged on the lower part of the shell 1, and a guide surface 37 for inclining downward and guiding the juice to the juicing cup 4 is arranged on the lower part of the squeezing cavity 31.

[0107] A plurality of inner convex ribs 32 extending from the middle part of the squeezing cavity 31 to the edge are arranged on the inner wall of the squeezing cavity 31. The inner convex ribs 32 are shaped like an arc matched with an inner surface of the squeezing cavity 31 and are distributed radially, a transition convex rib 34 is arranged between two adjacent ones of the inner convex ribs 32, and a length of the transition convex rib 34 is less than that of the inner convex ribs 32. The inner convex ribs 32 and the transition convex rib 34 are provided with clamping thorns 33.

[0108] A sliding groove 321 is surrounded by two adjacent convex ribs 32. When the juicing cover 3 is overturned and opened, an end part of the inserting rod 22 passes through the sliding groove 321 between two adjacent ones of the inner convex ribs 32 and can slide out of the sliding groove 321.

[0109] A certain distance is present between an inner end of each of the inner convex ribs 32 and the center point of the squeezing cavity 31, so that an accommodating cavity 36 is surrounded by the inner ends of the inner convex ribs 32, and the accommodating cavity 36 is used to accommodate the end part of the inserting rod 22.

[0110] The drive screw 5 includes a screw body 51, a polished rod body 52 and a metal mandrel 55. The metal mandrel 55 is arranged in the screw body 51 and the polished rod body 52; the metal mandrel, the screw body and the polished rod body integrally form the drive screw 5 through injection molding; the drive body 51 and the polished rod body 52 can slide relatively; and the elastic part 7 acts on the screw body 51 and the polished rod body 52 of the drive screw 5 at the same time. The outer surface of the screw body 51 is provided with several thread grooves 511 formed by an external thread section. The coil thread insert 53 is rotatably clamped in several thread grooves 511 of the screw body 51 and is exposed out of the thread grooves 511 to form a drive thread. A limiting joint 513 is formed at the front end of the screw body 51, and limits and restrains the coil thread insert 53.

[0111] The shell 1 further includes a clamping connection piece 8 capable of sliding left and right; the clamping connection piece 8 is plate-shaped and placed slantways to be matched with the thread groove 511, and the clamping connection piece 8 has a small hole part 81 and a big hole part 82 that communicate with each other; in the rotary juicing work state of the drive screw 5, the drive screw 5 passes through the small hole part 81, and the hole wall of the small hole part 81 is clamped in the thread grooves 511 of the drive screw 5 to realize threaded fit; and when the drive screw 5 moves backward, the drive screw 5 can pass through the big hole part 82, and the hole wall of the big hole part 82 cannot be clamped into the thread grooves 511 of the drive screw 5. The small hole part 81 is an arc-shaped clamping groove, the big hole part 82 is a rectangular hole, and the arc-shaped clamping groove is located at the side wall of the rectangular hole.

[0112] One end of the clamping connection piece 8 is connected to the key 9 on the shell 1, and a spring 10 that keeps the clamping connection piece 8 moving in a direction of the key 9 is arranged at the other end of the clamping connection piece 8. A shaft sleeve 13 is fixed in the shell 1; the drive screw 5 penetrates into the shaft sleeve 13; a mounting box 14 is fixed in the shell 1; the key 9, the clamping connection piece 8 and the spring 10 are arranged in the mounting box 14; the shaft sleeve 13 passes through the mounting box 14; and the shaft sleeve 13 is provided with a notch 131 for the clamping connection piece 8 to enter therethrough.

[0113] The working principle and the process of the juicer are as follow.

[0114] Juicing process: the juicing cup 4 is put into the shell 1 through the cup inlet, the lock catch 35 is overturned downward, and the juicing cover 3 is opened, as shown in FIG. 1. At this time, the juicing head 2 moves forward to be exposed from the front opening 12, fruits (oranges, tangerines and lemons) are cut in half, and the surfaces with pulp are hung on the inserting rod 22. As shown in FIG. 2 to FIG. 3, the juicing cover 3 is closed, and the lock catch 35 locks the juicing cover 3 at the closed position. Then the key 9 is pressed, the clamping connection piece 8 moves backward, the drive screw 5 passes through the big hole part 82, and the hole wall of the big hole part 82 cannot be clamped into the thread groove 511 of the drive screw 5. At this time, the juicing head 2 can rapidly retract to the initial position along with the drive screw 5, as shown in FIG. 4. After release, the clamping connection piece 8 resets under the action of the spring 10, the drive screw 5 passes through the small hole part 81, and the hole wall of the small hole part 81 is clamped into the thread groove 511 of the drive screw 5 to realize threaded fit, as shown in FIG. 7.

[0115] The operator handle 6 is rotated to drive the juicing head 2 to rotate along with the drive screw 5. Under the threaded fit action of the clamping connection piece 8 and the thread groove 511 of the drive screw 5, the juicing head 2 moves toward the direction of the juicing cover 3 while rotating along with the drive screw 5. After the peel of the fruit is buckled by the clamping thorns 33 on the inner convex ribs 32 and the transition convex rib 34, the peel does not rotate easily. At this time, the juicing head 2 rotates and stirs in the pulp of the fruit. Combined with the forward movement of the juicing head 2, the fruit is subjected to the squeezing forces of the juicing cover 3 and the juicing head 2 at the same time to complete juicing, as shown in FIG. 2, FIG. 3 and FIG. 6. Fruit juicing is completed in the stirring and squeezing process, so juicing is more complete and the juice yield is high. Juice is guided to the juicing cup 4 located in the shell 1 through the guide surface 37, and then the juicing cup is taken out of the cup inlet 11.

[0116] The juicing path of the juicer is arranged transversely. Compared with the vertical juicing path, the juice will not be polluted, a labor-saving lever is formed between the operator handle 6 and the drive screw 5, and the juicing operation is labor-saving.

[0117] If the squeezing force is excessively large, the juicing head 2 will overcome the elastic force of the elastic part 7 to move backward and retract relative to the drive screw 5. This means that the juicing head 2 will not forcibly move forward to squeeze the juicing cover 3, thereby avoiding hard squeezing caused by a large squeezing force between the juicing head 2 and the juicing cover 3, preventing the bursting of the juicing cover and the continuous increase of the squeezing force, and achieving convenient and labor-saving operation. After the juicing head continues to rotate and stir the pulp, consumes a part of pulp and overcomes a certain resistance, the juicing head will continue to move forward to squeeze the fruit and the juicing cover. When the clamping connection piece 8 is in contact with the front end head of the drive thread S of the drive screw, the juicing head 2 cannot further move forward and will not squeeze the juicing cover any more, thereby achieving a safety protection function.

[0118] After juicing is completed, the lock catch 35 is released, the juicing cover 3 is overturned and opened, the end part of the inserting rod 22 passes through the sliding groove 321 between two adjacent ones of the inner convex ribs 32 and slides out of the sliding groove 321, and the peel hung on the inserting rod 22 is taken out to complete juicing.

Embodiment 2

[0119] As shown in FIG. 12 to FIG. 15, they are a preferred embodiment of the present invention.

[0120] A drive screw 5 includes a screw body 51, a polished rod body 52 and a metal mandrel 55; the metal mandrel 55 is arranged in the screw body 51 and the polished rod body 52, the metal mandrel 55, the screw body 51 and the polished rod body 52 are integrated through injection molding, and an external thread section formed by several thread grooves 511 is arranged on an outer wall of the screw body 51; the coil thread insert 53 is partially and rotatably clamped in the thread groove 511 on the external thread section, a groove width D of the thread groove 511 is matched with a width d of the coil thread insert 53, and a depth H of the thread groove 511 is less than a thickness h of the coil thread insert 53, as shown in FIG. 15. Therefore, the coil thread insert 53 is exposed out of the thread groove 511 to form a drive thread S, as shown in FIG. 14. A limiting joint 513 is arranged at an end part of the screw body 51 and limits and restrains a head end of the coil thread insert 53.

[0121] As shown in FIG. 14 to FIG. 15, the coil thread insert 53 includes a compression section 531 located at the tail part, the compression section 531 extends to a tail end 5311 of the coil thread insert 53, the compression section 531 is rotatably arranged on the screw body 51 outside the thread groove 511, and the compression section 531 can perform axial compression along the screw body 51 under a stress and enables the tail end of the coil thread insert 53 to perform compression toward the adjacent previous turn of coil thread insert 53. A surrounding angle of the compression section 531 on the screw body 51 is between 180 degrees and 360 degrees. The drive screw 5 further includes a limiting plug 513 that is arranged at the front end and used for the juicing head 2 to insert. A rear end of the drive screw further includes a rear end plug 522, and the rear end plug 522 is used to be inserted in the operator handle 6 in a limiting manner.

[0122] An outer end face M of the tail end of the coil thread insert 53 is an inclined surface inclining toward the adjacent previous turn of the coil thread insert 53. The screw body 51 is axially provided with a metal blocking sheet 54 for blocking the tail end of the coil thread insert 53 from screwing in along a circumferential direction. A width dl of the last turn of coil of the coil thread insert 53 is less than a width d of the previous turn of coil of the coil thread insert 53, and the width of the last turn of coil of the coil thread insert 53 is gradually reduced towards the tail end part.

[0123] An inserting groove 512 is axially formed in the screw body 51 corresponding to the compression section 531 at the tail end of the coil thread insert 53, the metal blocking sheet 54 includes an inserting part 542 and a protruded part 541, the inserting part 542 is inserted into the inserting groove 512, the tail end of the coil thread insert 53 can abut against one side of the protruded part 541, and the protruded part 541 can block the tail end of the coil thread insert 53 from screwing in along the circumferential direction. One end of the polished rod body 52 includes an abutting end 521 connected to the screw body 51, and the abutting end 521 abuts against the other side of the protruded part 541.

[0124] The inserting part 542 of the metal blocking sheet 54 is mounted in the mounting groove, the protruded part 541 is exposed out of the mounting groove, one side of the protruded part 541 abuts against the rear end part of the coil thread insert 53, and the other side of the protruded part 541 abuts against the abutting end 521 of the polished rod body 52. The metal blocking sheet 54 is made of metal. The metal blocking sheet 54 can enhance the strength for the drive screw 5 after the coil thread insert 53 bears the rotary stress during idling, thereby preventing breakage caused by the excessively large stress of the polished rod body 52.

[0125] The screw body 51 and the polished rod body 52 of the drive screw 5 are plastic rods. Compared with the metal screw, this drive screw has the advantages of light weight, convenient processing and low cost. To make up the defect of low drive thread strength of the plastic screw, this drive screw is further provided with the metal coil thread insert 53 rotatably clamped in the thread groove 511 of the external thread section, and the depth H of the thread groove 511 is less than the thickness h of a metal spring wire 2, so that the coil thread insert 53 rotatably clamped in the thread groove 511 can be exposed out of the thread groove 511 to form a drive thread S, the coil thread insert 53 is made of metal, the strength and wear resistance of the drive thread S are enhanced, the coil thread insert is not prone to wear after long-time use and not prone to slid in the drive process, and stable drive of the drive screw is ensure. When the compression section 531 of the coil thread insert 53 is stressed, the compression section 531 is compressed and deformed to make the insert tail end 5311 close to the adjacent previous turn of coil thread insert 53, so that the distance between the last turn of insert tail end 5311 and the adjacent previous turn of coil thread insert 53 is gradually reduced. When the clamping connection piece 8 in fit with the drive thread and the insert tail end 5311 of the coil thread insert 53 are close to and slides to the adjacent previous section of coil thread insert 53, the noise of the clamping connection piece 8 impacting the adjacent previous section of coil thread insert 53 is low.

[0126] As shown in FIG. 19, the elastic part 7 may further be set by the following structure. The drive screw 5 includes a front section 5a and a rear section 5b, the front section 5a is in inserting connection with the juicing head 2, the front section 5a and the rear section 5b are inserted in a drive sleeve 5c and can slide relatively and rotate together with the drive sleeve 5c, and the elastic part 7 is arranged in the drive sleeve 5c and acts on the front section and the rear section of the drive screw 5 at the same time.

Embodiment 3

[0127] As shown in FIG. 1 to FIG. 11, the present invention discloses a juicing assembly for a juicer, including a juicing cover 3, a juicing head 2 and a drive screw 5 connected to the juicing head 2. The juicing cover 3 is provided with an arc-shaped concave squeezing cavity 31; the squeezing cavity 31 can accommodate the juicing head 2; an inserting rod 22 for hanging fruits is arranged at the transverse top of an outer surface of the juicing head 2; and several inner convex ribs 32 extending from a middle part of the squeezing cavity 31 to an edge are arranged on the inner wall of the squeezing cavity 31. The inner convex ribs 32 are uniformly distributed along the inner wall of the squeezing cavity 31, and a transition convex rib 34 is arranged between two adjacent ones of the inner convex ribs 32. The transition convex rib 34 and the inner convex ribs 32 are provided with clamping thorns 33. A certain distance is present between an inner end of each of the inner convex ribs 32 and a center point of the squeezing cavity 31, so that an accommodating cavity 36 is surrounded by the inner ends of the inner convex ribs 32, and the accommodating cavity 36 can accommodate an end part of the inserting rod 22.

[0128] The outer surface of the juicing head 2 is an arc-shaped surface and is provided with a plurality of outer convex ribs 21, the juicing head 2 further includes an elastic part 7 that is arranged in the juicing head 2 and on the drive screw 5, and the elastic part 7 enables the outer surface of the juicing head 2 to retract toward the other side when the squeezing force from one side is greater than an elastic force of the elastic part 7. The juicing head 2 is internally provided with a concave cavity 25, and the elastic part 7 is sleeved on the bolt fixing column 27 in the concave cavity 25 and acts on the drive screw 5. Specifically, the concave cavity 25 is formed at the rear end of the juicing head 2, the drive screw 5 capable of sliding forward and backward relative to the juicing head 2 is restrained in the concave cavity 25, the drive screw 5 and the concave cavity 25 on the juicing head 2 are in key groove fit to make the two rotate synchronously and slide relatively, the elastic part 7 directly acts on the connecting head 24 to make the connecting head 24 keep moving towards the direction of the drive screw 5, two symmetrically arranged lug parts 241 are arranged on the side wall of the connecting head 24, a distance D1 is present between a bottom surface of the connecting head 24 and bottom surfaces of the lug parts 241, two elastic parts 7 are provided, and the lug parts 241 can compress the elastic parts 7 and transfer the thrust from the drive screw 5 to the juicing head 2. Compared with the fact that the elastic parts 7 are arranged between the concave cavity 25 and the bottom surface of the connecting head 24, this structure can set the elastic part longer, and the elastic part can be compressed more greatly, thereby providing a more appropriate elastic force to the juicing head. The front end of the drive screw 5 is inserted in the connecting head 24, the drive screw 5 rotates to drive the connecting head 21 and the juicing head 2 to rotate together, and the elastic part 7 indirectly acts on the drive screw 5.

[0129] A locking piece 26 is arranged in the concave cavity 25, and the locking piece 26 is connected to the bolt fixing column 27 for sleeving the elastic part 7 through a bolt to prevent the connecting head 24 from popping out toward a direction of the drive screw 5. A reinforcing rib 28 is fixedly connected between the concave cavity 25 and an inner concave surface of the juicing head 2.

[0130] The outer surface of the juicing head 2 is an arc-shaped surface and is provided with a plurality of outer convex ribs 21, the outer convex ribs 21 extend from the top of the juicing head to the edge of the arc-shaped surface, and a concave part 23 is arranged between one end, close to the inserting rod 22, of each of the outer convex ribs 21 and the inserting rod 22. When the inserting rod 22 abuts against the inner wall of the squeezing cavity 31, a gap is still present between the inner convex ribs 32 and the outer convex ribs 21. When the juicing cover 3 is overturned and opened, the end part of the inserting rod 22 passes through the sliding groove 321 between two adjacent ones of the inner convex ribs 32 and can slide out of the sliding groove 321.

[0131] In a case of excessively short distance, excessively small gap and excessively large mutual action force between the juicing head 2 and the corresponding juicing cover 3 in the working process of the juicing assembly, the juicing head 2 will overcome the elastic force of the elastic part 7 to move backward and retract relative to the drive screw, thereby preventing the juicing head 2 from further squeezing in the direction of the juicing cover 3 to avoid the bursting of the juicing cover 3 and the increase of the squeezing force, ensuring the service life of the juicer, and making an operator feel simple and labor-saving operation no matter in the previous stage or the later stage of juicing.

[0132] The above is merely illustrative of the preferred embodiments of the present invention and is not intended to limit the present invention, and various changes and modifications may be made by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention should be included within the protection scope of the present invention.