AN IMPROVED DISPOSAL PUNCTURE DEPTH ADJUSTABLE SAFETY LANCET

Abstract

An improved disposable puncture depth adjustable safety lancet includes a shell, a lancet core, a spring and a trigger; wherein: the shell has an adjusting ring to adjust the puncture depth in the front end; the adjusting ring is sleeved clearance-fit at the outside of the trigger head; the adjusting ring and the shell are connected in a rotational way in the peripheral direction, and are connected in a fixed way in the axial direction, and a rotational locating structure is set between the adjusting ring and the shell in the rotation direction; the adjusting ring is equipped with the rotating step face or rotating bevel on the inner wall, and rotate the adjusting ring to be in the different locating positions and the rotating step face or rotating bevel meets the collision face of lancet core in the different axial positions, thereby changing the puncture depth of needle tip.

Claims

1. An improved disposable puncture depth adjustable safety lancet consists of a shell, a lancet core, a spring and a trigger. The shell is fixedly at least two flexible claws and all flexible claws form a flexible clamp. The lancet core is held in the flexible clamp and the spring pushes the tail of lancet core and acts on the ejecting direction of lancet core. The flexible clamp uses the hook at the end and clamping force to clamp the lancet core to be in locking state before triggering. The head of trigger extends out of the front end of shell; the body of trigger is slideably connected in the shell; and the trigger is equipped with the bevel forcing the end of flexible clamp to stretch to the side direction in relative to the flexible claw; wherein: under the assembly state, the shell is provided with an adjusting ring to adjust the puncture depth in the front end, and the adjusting ring is a cylindrical-shape component; the adjusting ring is sleeved at the outside of the trigger head and its clearance fit with the trigger, and the end face of the trigger head to contact the skin is exposed out of the port at the front end of the adjusting ring; the adjusting ring and the shell are connected in a rotational way in the peripheral direction of the lancet core, and the adjusting ring and the shell are connected in a fixed way in the axial direction of the lancet core, and a rotational locating structure is set between the adjusting ring and the shell in the rotation direction. The adjusting ring is provided with the inner end face on the inner wall, and the inner end face faces the rear end direction of adjusting ring, and the inner end face is the rotating step face or rotating bevel, and the lancet core is provided with the side wing in relative to the rotating step face or rotating bevel, the end face of side wing facing the rotating step face or rotating bevel is the collision face, and the trigger is provided with the guide slot in relative to the side wing, and the guide slot is provided with an opening at the outside of trigger head, so that the collision face could rush to the rotating step face or rotating bevel through the opening during the ejection of lancet core; the rotation of adjusting ring could locate the adjusting ring in different locating positions at the peripheral direction of the shell, and the rotating step face or rotating bevel meets the collision face of lancet core in the different axial positions, thereby changing the puncture depth of needle tip.

2. The lancet as claimed in claim 1, wherein: the shell is equipped with the protruding ribs in the peripheral direction, and the protruding rib is equipped with a notch, and all notches in the peripheral direction are in the same peripheral direction, thus forming the discontinuous inner slots; and the adjusting ring is equipped with the flanging extending outwards in relative to the discontinuous inner slots and the flanging sets and forms the external locking gears at interval in the peripheral direction of the adjusting ring; under the assembly state, the rear end of the adjusting ring is inserted into the front end of the shell, and the external locking gears are clamped into the discontinuous inner slots, so that the adjusting ring and the shell form the rotational connection in the peripheral direction of the lancet core and form the fixed connection in the axial direction of the lancet core.

3. The lancet as claimed in claim 1, wherein: the shell is equipped with the ring-type inner slots on the inner wall in the peripheral direction; and the adjusting ring is equipped with the flanging extending outwards in relative to the ring-type inner slots and the flanging sets and forms the external locking gears at interval in the peripheral direction of the adjusting ring; under the assembly state, the rear end of the adjusting ring is inserted into the front end of the shell, and the external locking gears are clamped into the ring-type inner slots, so that the adjusting ring and the shell form the rotational connection in the peripheral direction of the lancet core, and form the fixed connection in the axial direction of the lancet core.

4. The lancet as claimed in claim 1, wherein: the shell is equipped with the ring-type outer slots on the outer wall in the peripheral direction; and the adjusting ring is equipped with the flanging extending inwards in relative to the ring-type outer slots and the flanging sets and forms the internal locking gears at interval in the peripheral direction of the adjusting ring; under the assembly state, the rear end of the adjusting ring is inserted into the front end of the shell, and the internal locking gears are clamped into the ring-type outer slots, so that the adjusting ring and the shell form the rotational connection in the peripheral direction of the lancet core and form the fixed connection in the axial direction of the lancet core.

5. The lancet as claimed in claim 1, wherein: the rotational locating structure is composed of the fitting of locating slots set apart in the peripheral direction and the convex, and one of the locating slot and convex is set on the fitting surface on the shell, and the other is set on the fitting surface of the adjusting ring.

6. The lancet as claimed in claim 5, wherein: two to six locating slots are set apart in the peripheral direction to constitute two to six gears of puncture depth for adjustment.

7. The lancet as claimed in claim 6, wherein: the adjusting ring is equipped with the corresponding gear marks at its outside, and the shell is provided with the locating marks in relative to the gear marks for two to six gears of puncture depths.

8. The lancet as claimed in claim 1, wherein: the rotating step face or rotating bevel on the inner wall of the adjusting ring consists of the left half section and right half section, and the left half section rotates along the adjusting ring by 180 to overlap with the right half section; the collision face of the lancet core is bilaterally symmetrically arranged based on the axis of the lancet core, and the bilaterally symmetrical collision face fits with the left half section and right half section of rotating step face or rotating bevel.

9. The lancet as claimed in claim 1, wherein: the port at the front end of the adjusting ring is laterally projected to be a concave notch, and the end face of the trigger head to contact the skin is exposed from the concave notch, a twist cap is located at the front end of the adjusting ring, and the twist cap is equipped with the connecting rod and convex curved edge; under the assembly state, the end of connecting rod is fitted with the head of lancet core, and the convex curved edge of the twist cap is fitted with the concave notch of the adjusting ring, thus forming the rotational unplugging structure of the twist cap.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG. 1 is the exploded perspective view of lancet of the embodiment of present invention;

[0021] FIG. 2 is the perspective view of the lancet of the embodiment of present invention;

[0022] FIG. 3 is the schematic view of the assembly relationship between the adjusting ring and shell of the embodiment of present invention;

[0023] FIG. 4 is the view showing the assembly state of the adjusting ring and shell of the embodiment of present invention;

[0024] FIG. 5 is the perspective view of the adjusting ring of the embodiment of present invention;

[0025] FIG. 6 is perspective view of the trigger of the embodiment of present invention;

[0026] FIG. 7 is the perspective view of the lancet core of the embodiment of present invention;

[0027] FIGS. 8 and 9 are the view showing the use state (1) of the embodiment of present invention;

[0028] FIGS. 10 and 11 are the view showing the use state (2) of the embodiment of present invention;

[0029] FIGS. 12 and 13 are the view showing the use state (3) of the embodiment of present invention;

[0030] FIGS. 14 and 15 are the view showing the use state (4) of the embodiment of present invention;

[0031] The number description of above described drawings is as follows:

[0032] 1. Shell; 2. Tail cover; 3. Lancet core; 4. Spring; 5. Trigger; 6. Twist cap; 7. Flexible claw; 8. Bevel; 9. Hook; 10. Adjusting ring; 11. End face; 12. Rotating step face; 13. Collision face; 14. Protruding rib; 15 Notch; 16. External locking gear; 17. Locating slot; 18. Convex; 19. Concave notch; 20. Connecting rod; 21. Convex curved edge; 22. Side wing; 23. Guide slot; 24. Opening; 25. Gear mark; 26. Locating mark.

SPECIFIC EMBODIMENT

[0033] With reference to the accompanying drawings and embodiment, the present invention will be described in detail.

Embodiment: An Improved Disposable Puncture Depth Adjustable Safety Lancet

[0034] As shown in FIG. 1-7, the improved disposable puncture depth adjustable safety lancet consists of a shell 1, a tail cover 2, a lancet core 3, a spring, a trigger 5, a adjusting ring 10 and a twist cap 6 (see FIG. 1).

[0035] Under the assembly state (see FIG. 2), the tail cover 2 is covered at the rear end of the shell 1, and the tail cover 2 protrudes two flexible claws 7 in the symmetrical arrangement inside the shell 1 (see FIG. 1) and the two flexible claws 7 form a flexible clamp. The lancet core 3 is held in the flexible clamp and the spring 4 pushes the tail of lancet core 3 and acts on the ejecting direction of lancet core 3. The flexible clamp uses the hook 9 at the end (see FIG. 1) and clamping force to clamp the lancet core 3 to be in locking state before triggering. The head of trigger 5 extends out of the front end of shell 1; the body of trigger 5 is slideably connected in the shell 1; and the trigger 5 is equipped with the bevel 8 forcing the end of flexible clamp to stretch to the side direction in relative to the flexible claw 7 (see FIG. 6); The twist cap 6 is installed in the head of lancet.

[0036] The above content of the present invention is the prior art and the innovation of present invention lies in: under the assembly state, the adjusting ring 10 to adjust the puncture depth is set in the front end of the shell 1 and the adjusting ring 10 is a cylindrical-shape component (see FIG. 5). The adjusting ring 10 is sleeved at the outside of the trigger 5 head and it's clearance fit with the trigger 5, and the end face 11 (see FIG. 1) of the trigger 5 head to contact the skin is exposed out of the port at the frond end of the adjusting ring 10. The adjusting ring 10 and the shell 1 are connected in a rotational way in the peripheral direction of the lancet core 3, and the adjusting ring 10 and the shell 1 are connected in a fixed way in the axial direction of the lancet core 3, and a rotational locating structure is set between the adjusting ring 10 and the shell 1 in the rotation direction.

[0037] The adjusting ring 10 and the shell 1 are connected in a rotational way in the peripheral direction of the lancet core 3, and the adjusting ring 10 and the shell 1 are connected in a fixed way in the axial direction of the lancet core 3, and the specific implementation form is: the shell 1 is equipped with the protruding ribs 14 in the peripheral direction (see FIG. 3) and the protruding rib 14 is equipped with a notch 15 and all notches 15 in the peripheral direction are in the same peripheral direction, thus forming the discontinuous inner slots. And the adjusting ring 10 is equipped with the flanging extending outwards in relative to the discontinuous inner slots and the flanging sets and forms the external locking gears 16 at interval (see FIG. 3) in the peripheral direction of the adjusting ring 10. Under the assembly state (see FIGS. 3 and 4), the rear end of the adjusting ring 10 is inserted into the front end of the shell 1, and the external locking gears 16 are clamped into the discontinuous inner slots, so that the adjusting ring 10 and the shell 1 form the rotational connection in the peripheral direction of the lancet core 3 and form the fixed connection in the axial direction of the lancet core 3.

[0038] The rotational locating structure is composed of the fitting of locating slots 17 set apart in the peripheral direction and the convex 18, and one of the locating slot 17 and convex 18 is set on the fitting surface on the shell 1, and the other is set on the fitting surface of the adjusting ring 10. In this embodiment, the locating slot 17 is set at the outside peripheral surface of the adjusting ring 10 (see FIG. 3) and the convex 18 is set at the inside surface of the shell 1 (see FIG. 3). Two to six locating slots are set apart in the peripheral direction to constitute two to six gears of puncture depth for adjustment. In this embodiment, three locating slots 17 are set to form 3 gears of puncture depth for adjustment. The adjusting ring 10 is equipped with the corresponding gear marks 25 at its outside and the shell 1 is provided with the locating marks 26 in relative to the gear marks for three gears of puncture depths.

[0039] The adjusting ring 10 is provided with the inner end face on the inner wall, and the inner end face faces the rear end direction of adjusting ring 10, and the inner end face is the rotating step face 12, and the lancet core 3 is provided with the side wing 22 in relative to the rotating step face 12 (see FIG. 7), the end face of side wing 22 facing the rotating step face 12 is the collision face 13 (see FIG. 7), and the trigger 5 is provided with the guide slot 23 in relative to the side wing 22 (see FIG. 6), and the guide slot 23 is provided with an opening 24 at the outside of trigger 5 head (see FIG. 6), so that the collision face 13 could rush to the rotating step face 12 through the opening 24 during the ejection of lancet core 3. The rotation of adjusting ring 10 could locate the adjusting ring 10 in different locating positions at the peripheral direction of the shell 1, and the rotating step face 12 meets the collision face 13 of lancet core 3 in the different axial positions, thereby changing the puncture depth of needle tip.

[0040] The rotating step face 12 on the inner wall of the adjusting ring 10 consists of the left half section and right half section, and the left half section rotates along the adjusting ring 10 by 180 to overlap with the right half section. The collision face 13 of the lancet core 3 is bilaterally symmetrically arranged based on the axis of the lancet core 3, and the bilaterally symmetrical collision face 13 fits with the left half section and right half section of rotating step face 12.

[0041] The port at the front end of the adjusting ring 10 is laterally projected to be a concave notch 19 and the end face of the trigger 5 head to contact the skin is exposed from the concave notch 19, the twist cap 6 is located at the front end of the adjusting ring 10 and the twist cap 6 is equipped with the connecting rod 20 and convex curved edge 21. Under the assembly state, the end of connecting rod 20 is fitted with the head of lancet core 3, and the convex curved edge 21 of the twist cap 6 is fitted with the concave notch 19 of the adjusting ring 10, thus forming the rotational unplugging structure of the twist cap 6.

[0042] The operation process of the embodiment of the present invention is as follows:

[0043] Firstly, twist the protection cap.

[0044] As shown in FIGS. 8 and 9, twist the twist cap 6 first. As the convex curved edge 21 of the twist cap 6 is rotationally fitted with the concave notch 19 of the adjusting ring 10, the connecting rod 20 of the lancet core 3 drives the protection bar of the lancet core 3 to rotate and finally break the neck between the protection bar and the body, then unplug the twist cap 6.

[0045] Secondly, adjust the puncture depth.

[0046] As shown in the FIGS. 10 and 11, rotate the adjusting ring 10 to make the adjusting ring 10 rotate in relative to the shell 1. Due to the function of the rotational locating structure between the adjusting ring 10 and the shell 1, the adjusting ring 10 is located at one angular position in relative to the shell 1, i.e. at one gear. At the same time, the rotating step face 12 on the inner wall of the adjusting ring 10 rotates with the adjusting ring 10 and finally makes the rotating step face 12 meet the collision face 13 of the lancet core 3 in the different axial position, thus changing the puncture depth of the needle tip.

[0047] Thirdly, press the trigger at the blood collection position

[0048] As shown in FIGS. 12 and 13, align the trigger 5 head with the blood collection position for pressing and when the trigger 5 head is pressed, the trigger 5 move backwards in relative to the shell 1, and the bevel 8 on the trigger 5 forces the flexible claws 7 to open laterally (see the two circles in FIG. 13) until they are near the unhooking point.

[0049] Fourthly, shoot and puncture.

[0050] As shown in FIGS. 14 and 15, when the pressing exceeds the unhooking points, it triggers the unhooking of the lancet core 3 (see the two circles in FIG. 15) and enters the shooting and puncturing state under the pushing of the spring 4 to start the shooting and puncturing.

[0051] The following the description about the other embodiments and changes of the present invention:

[0052] 1. The embodiment of the present invention is the twist cap type head pressing disposal lancet structure, and it is apparent to those skilled in the art after reading this disclosure that the present invention is equally applicable to the cover cap type head pressing disposal lancet structure.

[0053] 2. In the above embodiment, the bevel 8 set on the trigger 5 is the flat face. The present invention actually has four types: the first type is the bevel in the form of flat face; the second type is the bevel in the form of concave surface (the bevel is straight in the oblique direction, and it's the concave surface or convex surface in the vertical direction, but its substantially bevel); the third type is the bevel in the form of tapered face; the fourth type is the bevel in the form of cambered face (the bevel has the concave arc or convex arc in the oblique direction, but it's substantially bevel). It could be determined according to the actual condition.

[0054] 3. In the above embodiment, one flexible clamp formed by the two flexible claws 7, and it's the extension structure extended from the inner end face of the tail cover 2. But the present invention is not limited to this, as the flexible clamps could directly extend from the shell 1. For example, the shell 1 could be designed to be combined by the upper half section and lower half section, and one flexible claw could extend from one half section each, and after the combination of two half sections of the shell, two flexible claws could form a flexible clamp. At this time, the tail cover 2 could be omitted and integrated into the shell of two half sections. Therefore, the tail cover 2 and the flexible claw structure extended from the tail cover 2 are not deemed as the necessary condition in the claim 1, which could be understood and recognized by those skilled in the art.

[0055] 4. In the above embodiment, the flexible clamp is formed by two symmetrically arranged flexible claws. But the number of flexible claws in the present invention is not limited to two, and it could contain more than two claws, such as three, four, and five, etc. These flexible claws could be arranged around the lancet core to reach the purpose of the present invention and realize the same technical effect. This is the change that could be easily understood by those skilled in the art.

[0056] 5. In the above embodiment, the rotating step face 12 is set on the inner wall of the adjusting ring 10 to realize several puncture depths and actually when the rotating step face 12 is changed to the rotating bevel to reach the purpose of the present invention and realize the same technical effect, which is the change that could be easily understood by those skilled in the art.

[0057] 6. In the above embodiment, it describes one specific implementation form for the rotational connection of the adjusting ring 10 and the shell 1 in the peripheral direction and the fixed connection in the axial direction, but the present invention is not limited to this, and it could also have the following forms:

[0058] (1) The shell 1 is provided with the ring-type inner slots on the inner wall in the peripheral direction. And the adjusting ring 10 is equipped with the flanging extending outwards in relative to the ring-type inner slots and the flanging sets and forms the external locking gears 16 at interval in the peripheral direction of the adjusting ring 10. Under the assembly state, the rear end of the adjusting ring 10 is inserted into the front end of the shell 1, and the external locking gears 16 are clamped into the ring-type inner slots, so that the adjusting ring 10 and the shell 1 form the rotational connection in the peripheral direction of the lancet core 3 and form the fixed connection in the axial direction of the lancet core 3.

[0059] (2) The shell 1 is provided with the ring-type outer slots on the outer wall in the peripheral direction. And the adjusting ring 10 is equipped with the flanging extending inwards in relative to the outer inner slots and the flanging sets and forms the internal locking gears at interval in the peripheral direction of the adjusting ring 10. Under the assembly state, the rear end of the adjusting ring 10 is inserted into the front end of the shell 1, and the internal locking gears are clamped into the ring-type outer slots, so that the adjusting ring 10 and the shell 1 form the rotational connection in the peripheral direction of the lancet core 3 and form the fixed connection in the axial direction of the lancet core 3.

[0060] (3) Combining the above two forms to obtain the third form. And so forth.

[0061] In summary, as along as the adjusting ring 10 and the shell 1 have the rotational connection relationship in the peripheral direction and have the fixed connection relationship in the axial direction at the same time in the present invention, if could reach the purpose of the present invention and get the same effect.

[0062] 7. In the above embodiment, the concave notch 19 is set on the adjusting ring 10 and the convex curved edge is set on the twist cap 6. Actually, setting the convex curved edge 21 on the adjusting ring 10 and setting the concave notch 19 on the twist cap 6 could also reach the purpose of the present invention and realize the same technical effect, which is the change that could be easily understood by those skilled in the art.

[0063] It should be noted that the above described embodiments are only for illustration of technical concept and characteristics of present invention with purpose of making those skilled in the art understand the present invention, and thus these embodiments shall not limit the protection range of present invention. The equivalent changes or modifications according to spiritual essence of present invention shall fall in the protection scope of present invention.