Insulin pen needle front-end protection apparatus

Abstract

An insulin pen needle front-end protection apparatus, comprising a housing (1), the housing(1) being provided with a first through hole (11) in a head end; a needle base (2) fixedly connected to a tail end of the housing (1), the needle base (2) being provided with a protruding portion (21) extending towards the head end of the housing (1), and an injection needle (22) extending out of the first through hole (11) being arranged on the protruding portion (21); a sliding buckle (3) sleeved on the protruding portion (21), a constriction structure being arranged at a tail end of the sliding buckle (3), and a head end of the sliding buckle (3) being provided with a second through hole (31); and a needle tip protection sleeve (4) at least partially arranged in the housing (1), a spring (5) being clamped between a tail end of the needle tip protection sleeve (4) and the needle base (2), a head end of the needle tip protection sleeve (4) extending out of the first through hole (11) and being provided with a third through hole (41), and at least two clamping buckles (42) being arranged on an inner wall of the needle tip protection sleeve (4).

Description

Insulin pen needle front end protection device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on November 14, 2023, with application number 202311515474.5. The entire contents of the above application are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of medical devices, for example, to a front end protection device for an insulin pen needle. Background Art

[0003] Insulin injection as a method of treating diabetes has been widely used. Its main function is to accurately infuse insulin into the body of diabetic patients through an injection device to achieve the purpose of controlling the patient's blood sugar.

[0004] The traditional injection form is an injection needle structure. The injection device includes a needle seat, a needle tube and an outer protective shell. After removing the protective shell before use, the insulin injection needle is directly exposed to the outside. After use, because it has no safety protection structure, it is easy to accidentally touch the needle and cause cross infection. In addition, there is a risk of reuse.

[0005] There is also a type of insulin pen needle that can be used as portable as a pen and takes needle protection design into consideration. However, the structure of such products is complex and varies. When protecting the front end of the needle, multiple components need to move, rotate, and other actions to cooperate in triggering. There are problems such as complex principles, high manufacturing costs, a large number of parts, cumbersome assembly, and a high failure rate.

[0006] Summary of the Invention

[0007] Based on the above problems, the present application provides an insulin pen needle front end protection device to optimize the needle protection principle, simplify the product structure, improve the safety and convenience of use, and reduce costs.

[0008] The present application provides an insulin pen needle front end protection device, comprising:

[0009] A shell, wherein a first through hole is formed at a head end of the shell;

[0010] The needle seat is fixedly connected to the rear end of the housing, and is provided with a protrusion extending toward the head end of the housing, and the protrusion is provided with an injection needle extending out of the first perforation;

[0011] A sliding buckle is sleeved on the convex portion, a constriction structure is provided at the tail end of the sliding buckle, and a second through-hole is provided at the head end of the sliding buckle;

[0012] A needle tip shield is at least partially disposed in the housing, a spring is sandwiched between the rear end of the needle tip shield and the needle seat, a head end of the needle tip shield extends out of the first through-hole and a third through-hole is disposed on the head end of the needle tip shield, and at least two buckles are disposed on the inner wall of the needle tip shield;

[0013] When the insulin pen needle is in use, the needle tip protection sleeve compresses the spring and retracts into the housing, the needle tip of the injection needle is exposed from the third perforation, and at least two buckles hook the opening of the second perforation;

[0014] When the insulin pen needle has been used, the head end of the needle tip protection cover pops out of the first perforation under the action of the spring to cover the needle tip of the injection needle, and the needle tip protection cover drives the sliding buckle to separate from the needle seat, and the binding structure contracts so that the tail end of the sliding buckle abuts against the end of the protrusion, thereby locking the needle tip protection cover.

[0015] Optionally, the cuff structure includes a plurality of claws arranged in a ring, with shrinkage gaps left between adjacent claws, and an elastic sleeve is provided on the sliding buckle to apply pressure to the outer sides of the plurality of claws, so that each claw can bend inward under pressure.

[0016] Optionally, at least two buckles are formed on the inner wall of the head end of the needle tip protection sleeve, and the at least two buckles are evenly distributed on the outer circle of the third perforation.

[0017] Optionally, a stop is provided on the inner side of the second perforation for facilitating hooking of at least two buckles.

[0018] Optionally, the outer wall of the head end of the needle tip shield slides with the hole wall of the first perforation, and the tail end of the needle tip shield is provided with a limiting edge to prevent the needle tip shield from falling out of the first perforation, and the outer edge of the limiting edge slides with the inner wall of the shell.

[0019] Optionally, the head end of the sliding buckle is provided with a guiding bevel for facilitating the sliding buckle to be embedded in the needle tip protection sleeve.

[0020] Optionally, a ridge is provided on the inner wall of the sliding buckle to reduce the gap between the sliding buckle and the protrusion.

[0021] Optionally, a stop step is provided on the inner wall of the sliding buckle to limit the end of the protrusion.

[0022] Optionally, a connecting thread configured to connect to an insulin injection pen is provided on the inner wall of the needle seat.

[0023] Optionally, an annular convex rib and an axial positioning rib are provided on the outer wall of the needle seat, and an embedding groove cooperating with the annular convex rib and a positioning slot cooperating with the axial positioning rib are provided on the inner wall of the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a structural diagram of an insulin pen needle front end protection device provided in an embodiment of the present application;

[0025] FIG2 is an exploded view of the structure of the insulin pen needle front end protection device provided in an embodiment of the present application;

[0026] FIG3 is a schematic diagram of the structure of a sliding buckle in the front end protection device of an insulin pen needle provided in an embodiment of the present application;

[0027] FIG4 is a schematic structural diagram of a needle tip protection sleeve in a front end protection device for an insulin pen needle provided in an embodiment of the present application;

[0028] FIG5 is a schematic structural diagram of the front end protection device of the insulin pen needle provided in an embodiment of the present application before use;

[0029] FIG6 is a schematic structural diagram of the front end protection device of the insulin pen needle provided in an embodiment of the present application when in use;

[0030] FIG7 is a schematic structural diagram of the front end protection device of the insulin pen needle provided in an embodiment of the present application after use;

[0031] FIG8 is another structural schematic diagram of the sliding buckle in the front end protection device of the insulin pen needle provided in an embodiment of the present application.

[0032] In the figure: 1. Shell; 11. First perforation; 12. Embedded groove; 13. Positioning slot; 2. Needle seat; 21. Protrusion; 22. Injection needle; 23. Connecting thread; 24. Circumferential rib; 25. Axial positioning rib; 3. Sliding buckle; 31. Second perforation; 32. Claw; 33. Shrinkage gap; 34. Elastic sleeve; 35. Ridge; 36. Stop step; 37. Stop mouth; 38. Guide slope; 39. Reducing ring; 4. Needle tip protection sleeve; 41. Third perforation; 42. Buckle; 43. Limiting edge; 5. Spring. DETAILED DESCRIPTION

[0033] The technical solutions of the embodiments of the present application will be described below in conjunction with the accompanying drawings, and the described embodiments serve as part of the embodiments of the present application.

[0034] 1 and 2 , this embodiment provides an insulin pen needle front end protection device, comprising a housing 1 , a needle seat 2 , a sliding buckle 3 and a needle tip protection sleeve 4 .

[0035] A first through hole 11 is defined at the head end of the housing 1 .

[0036] The needle base 2 is fixedly connected to the rear end of the housing 1 . The needle base 2 is provided with a protrusion 21 extending toward the head end of the housing 1 . The protrusion 21 is provided with an injection needle 22 extending out of the first through-hole 11 .

[0037] The inner wall of the needle holder 2 is provided with a connecting thread 23 for connecting to the insulin injection pen. Generally, the insulin injection pen is connected to the housing 1. To reduce the difficulty of connection, the connecting thread 23 for connecting to the insulin injection pen is provided on the needle holder 2 in this embodiment.

[0038] In addition, an annular convex rib 24 and an axial positioning rib 25 are provided on the outer wall of the needle seat 2, and an embedding groove 12 that cooperates with the annular convex rib 24 and a positioning slot 13 that cooperates with the axial positioning rib 25 are provided on the inner wall of the shell 1 to ensure that the needle seat 2 and the shell 1 are accurately and reliably assembled.

[0039] The sliding buckle 3 is sleeved on the convex portion 21 . The tail end of the sliding buckle 3 is provided with a constriction structure, and the head end of the sliding buckle 3 is provided with a second through hole 31 .

[0040] As shown in Figure 3, the cuff structure comprises several annularly arranged claws 32, with contraction gaps 33 between adjacent claws 32. The sliding buckle 3 is fitted with an elastic sleeve 34 that applies pressure to the outer sides of the claws 32, causing each claw 32 to bend inward under pressure. When the sliding buckle 3 is fitted over the protrusion 21, the claws 32 are forced to expand. When the sliding buckle 3 is separated from the protrusion 21, the claws 32 contract under the action of the elastic sleeve 34, preventing them from being refitted onto the protrusion 21.

[0041] In addition, the opening structure can also be deformed. As shown in FIG8 , a stainless steel open reducing ring 39 is used to be sleeved on the outside of the claw 32 , which can also realize the function of changing the diameter by squeezing when the sliding buckle 3 is separated from the protrusion 21 , thereby meeting the limiting requirements.

[0042] The inner wall of the sliding buckle 3 is provided with a ridge 35 to reduce the gap with the protrusion 21, and the inner wall of the sliding buckle 3 is provided with a stop step 36 to limit the end of the protrusion 21 to ensure the assembly effect of the initial product.

[0043] The needle tip shield 4 is at least partially disposed in the housing 1. A spring 5 is sandwiched between the rear end of the needle tip shield 4 and the needle seat 2 to apply a pressing force to the needle tip shield 4 toward the first through-hole 11 at the front end of the housing 1. The front end of the needle tip shield 4 can extend out of the first through-hole 11. A third through-hole 41 is provided on the front end of the shield 4. A buckle 42 is provided on the inner wall of the needle tip shield 4.

[0044] As shown in Figure 4 , buckles 42 are molded onto the inner wall of the tip of the needle tip shield 4 , with two buckles 42 evenly distributed around the outer periphery of the third through-hole 41 . As shown in Figure 3 , a stopper 37 is provided on the inner side of the opening of the second through-hole 31 to facilitate hooking of the buckles 42 , thereby ensuring a secure fit between the buckles 42 and the opening of the second through-hole 31 .

[0045] Optionally, the outer wall of the head end of the needle tip shield 4 slides with the hole wall of the first perforation 11, and the tail end of the needle tip shield 4 is provided with a limiting edge 43 to prevent the needle tip shield 4 from falling out of the first perforation 11. The outer edge of the limiting edge 43 slides with the inner wall of the outer shell 1 to ensure that the needle tip shield 4 can only move axially in the outer shell 1.

[0046] The head end of the sliding buckle 3 is provided with a guiding slope 38 for facilitating the sliding buckle 3 to be inserted into the needle tip protection sleeve 4 , thereby ensuring that the buckle 42 can be accurately inserted into the second through-hole 31 .

[0047] The state of the insulin pen needle before use is shown in Figure 5. The sliding buckle 3 is sleeved on the protrusion 21, and the tail end of the sliding buckle 3 clamps the protrusion 21 under the action of the binding structure and the ridge 35; the needle tip protection sleeve 4 is pressed against the hole of the first perforation 11 under the action of the spring 5, so as not to contact the sliding buckle 3 and cover the needle tip of the injection needle 22.

[0048] The state of the insulin pen needle when in use is shown in Figure 6. The tip of the insulin pen needle is against the human skin. At this time, the needle tip protection sleeve 4 compresses the spring 5 and retracts into the shell 1, and the needle tip of the injection needle 22 is exposed from the third perforation 41; when compressed to the maximum amount, the needle tip is completely exposed, the needle tip protection sleeve 4 is put on the tip of the sliding buckle 3, and the buckle 42 hooks the hole of the second perforation 31.

[0049] The state of the insulin pen needle after use is shown in Figure 7. Under the action of the spring 5, the head end of the needle tip protection sleeve 4 pops out of the first perforation 11 to cover the needle tip of the injection needle 22, and at the same time drives the sliding buckle 3 to separate from the needle seat 2; when the needle tip protection sleeve 4 is reset to the initial position, the tail end of the sliding buckle 3 is completely separated from the protrusion 21, and the binding structure shrinks under the action of the elastic sleeve 34, so that the inner diameter of the tail end of the sliding buckle 3 is smaller than the outer diameter of the protrusion 21, so that the sliding buckle 3 cannot be put on the protrusion 21 again, and at this time the tail end of the sliding buckle 3 is against the end of the protrusion 21, and the head end of the sliding buckle 3 is against the inner wall of the head end of the needle tip protection sleeve 4, and the needle tip protection sleeve 4 cannot be retracted into the shell 1 again, thereby locking the needle tip protection sleeve 4, achieving the purpose of preventing needle puncture.

[0050] The above-mentioned front end protection device of the insulin pen needle is designed with a needle tip protection sleeve 4 with a telescopic action. The needle tip protection sleeve 4 pulls the sliding buckle 3 to separate the sliding buckle 3 from the needle seat 2, so that the tail end of the sliding buckle 3 shrinks and abuts against the needle seat 2 to limit the travel of the needle tip protection sleeve 4, so that the needle tip protection sleeve 4 cannot be retracted again after covering the needle tip, thereby avoiding the front end of the injection needle 22 from being exposed after using the pen needle, greatly simplifying the product structure, reducing costs, and improving safety and convenience of use.

Claims

1. An insulin pen needle front end protection device, comprising: A housing (1), wherein a first through hole (11) is formed at a head end of the housing (1); A needle seat (2) is fixedly connected to the rear end of the housing (1), the needle seat (2) is provided with a convex portion (21) extending toward the head end of the housing (1), and the convex portion (21) is provided with an injection needle (22) extending out of the first through hole (11); A sliding buckle (3) is sleeved on the convex portion (21), the tail end of the sliding buckle (3) is provided with a constriction structure, and the head end of the sliding buckle (3) is provided with a second through hole (31); A needle tip protection sleeve (4) is at least partially disposed in the housing (1), a spring (5) is sandwiched between the rear end of the needle tip protection sleeve (4) and the needle seat (2), the head end of the needle tip protection sleeve (4) extends out of the first through hole (11) and a third through hole (41) is disposed on the head end of the needle tip protection sleeve (4), and at least two buckles (42) are disposed on the inner wall of the needle tip protection sleeve (4); When the insulin pen needle is in use, the needle tip protective cover (4) compresses the spring (5) and retracts into the housing (1), the needle tip of the injection needle (22) is exposed from the third through hole (41), and the at least two buckles (42) hook the opening of the second through hole (31); When the insulin pen needle has been used, the head end of the needle tip protection cover (4) pops out of the first perforation (11) under the action of the spring (5) to cover the needle tip of the injection needle (22), and the needle tip protection cover (4) drives the sliding buckle (3) to detach from the needle seat (2), and the constriction structure contracts so that the tail end of the sliding buckle (3) abuts against the end of the protrusion (21), thereby locking the needle tip protection cover (4).

2. The insulin pen needle front end protection device according to claim 1, wherein: The cinch structure comprises a plurality of claws (32) arranged in an annular manner, with contraction gaps (33) being left between adjacent claws (32), and an elastic sleeve (34) being sleeved on the sliding buckle (3) for applying pressure to the outer sides of the plurality of claws (32), so that each claw (32) can bend inwards under pressure.

3. The insulin pen needle front end protection device according to claim 1, wherein: The at least two buckles (42) are formed on the inner wall of the head end of the needle tip protection sleeve (4), and the at least two buckles (42) are evenly distributed on the outer circle of the third through hole (41).

4. The insulin pen needle front end protection device according to claim 1, wherein: The inner side of the opening of the second through hole (31) is provided with a stopper (37) for facilitating the hooking of the at least two buckles (42).

5. The insulin pen needle front end protection device according to claim 1, wherein: The outer wall of the head end of the needle tip protection sleeve (4) is slidably engaged with the hole wall of the first through hole (11), and the tail end of the needle tip protection sleeve (4) is provided with a limiting edge (43) for preventing the needle tip protection sleeve (4) from slipping out of the first through hole (11), and the outer edge of the limiting edge (43) is slidably engaged with the inner wall of the shell (1).

6. The insulin pen needle front end protection device according to claim 1, wherein: The head end of the sliding buckle (3) is provided with a guiding inclined surface (38) for facilitating the sliding buckle (3) to be embedded in the needle tip protection cover (4).

7. The insulin pen needle front end protection device according to claim 1, wherein: The inner wall of the sliding buckle (3) is provided with a convex ridge (35) for reducing the clearance between the sliding buckle and the convex portion (21).

8. The insulin pen needle front end protection device according to claim 1, wherein: A stop step (36) for limiting the end of the protrusion (21) is provided on the inner wall of the sliding buckle (3).

9. The insulin pen needle front end protection device according to claim 1, wherein: The inner wall of the needle seat (2) is provided with a connecting thread (23) configured to be connected to an insulin injection pen.

10. The insulin pen needle front end protection device according to claim 1, wherein: The outer wall of the needle seat (2) is provided with an annular convex rib (24) and an axial positioning rib (25), and the inner wall of the shell (1) is provided with an embedding groove (12) cooperating with the annular convex rib (24) and a positioning slot (13) cooperating with the axial positioning rib (25).

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