CN110141733B

CN110141733B - Safety insulin syringe needle

Info

Publication number: CN110141733B
Application number: CN201910392399.5A
Authority: CN
Inventors: 杨莲英; 陈世钢; 王文亮; 王建民; 王文峰; 李海飞; 于冬梅
Original assignee: Shandong Lianfa Medical Plastic Products Co ltd
Current assignee: Shandong Lianfa Medical Plastic Products Co ltd
Priority date: 2019-05-10
Filing date: 2019-05-10
Publication date: 2023-06-30
Anticipated expiration: 2039-05-10
Also published as: CN110141733A

Abstract

The invention discloses a safe insulin injection needle head, which comprises an inner shell, a protective sleeve, a lock ring, a spring, a needle body and a needle seat, wherein a plurality of rail-changing devices are arranged on the inner wall of the inner shell; the track changing device comprises a first guide groove, a positioning groove, a first sliding inclined plane and a positioning lug; a plurality of guide convex blocks are arranged on the outer side wall of the protective sleeve; the lower part of the protective sleeve is provided with a plurality of downward-pressing convex blocks and downward-pressing inclined planes; a plurality of through grooves, elastic arms and positioning stop blocks are arranged on the side wall of the locking ring; the positioning stop block is provided with a second sliding inclined plane and a transition inclined plane. The safe insulin injection needle head provided by the invention can automatically hide the needle body after injection is finished, can not expose the needle body due to false touch, can avoid injury to personnel, has the function of avoiding cross infection, and can prevent the risk of repeated use of the needle head.

Description

Safety insulin syringe needle

Technical Field

The invention relates to the technical field of medical equipment, in particular to a safe insulin injection needle.

Background

Insulin injection needles have been widely used as a means for treating diabetes, and have a main function of controlling blood sugar of a patient by injecting insulin into the body of the diabetic patient.

The prior art insulin injection needle generally comprises a needle seat, a needle body and an external protective shell. Before use, the protective shell needs to be removed to expose the needle body; after the use is completed, the needle body is completely exposed outside, and the safety protection structure is not provided, so that accidental injury is easily caused to other people, and cross infection caused by accidental mistake of the needle body is easily caused. Meanwhile, since the unnecessary protective structure is not needed, the injection needle body can be reused after being used, so that the risk of being reused exists.

Disclosure of Invention

In order to make up for the defects of the prior art, the invention provides a safe insulin injection needle, which can automatically hide the needle body after injection is finished, can not expose the needle body due to false touch, can avoid injury to personnel, plays a role in avoiding cross infection, and can prevent the risk of repeated use of the needle to solve the problems in the prior art.

The invention is realized by the following technical scheme:

the safe insulin syringe needle comprises an inner shell, a protective sleeve, a lock ring, a spring, a needle body and a needle seat, wherein the main body structure of the inner shell is a cylinder; the top of the inner shell is provided with an assembly hole; a plurality of rail changing devices are arranged on the inner wall of the inner shell; the track changing device comprises a first guide groove and a positioning groove which are adjacent to each other; a first sliding inclined plane is arranged between the first guide groove and the positioning groove; positioning convex blocks are arranged in the positioning grooves; a plurality of second guide grooves are arranged between two adjacent track-changing devices;

the main structure of the protective sleeve is a cylinder; the protective sleeve is vertically arranged inside the inner shell, and the upper part of the protective sleeve extends to the outside of the inner shell through the assembly hole; a first pinhole is formed in the top of the protective sleeve; a plurality of guide convex blocks corresponding to the first guide grooves and the second guide grooves are arranged on the outer side wall of the protective sleeve; the lower part of the protective sleeve is provided with a plurality of downward-pressing convex blocks, and the bottoms of the downward-pressing convex blocks are provided with downward-pressing inclined planes;

the main body structure of the lock ring is a cylinder; the upper part of the locking ring is movably arranged in the protective sleeve; a second pinhole is formed in the top of the locking ring; the side wall of the locking ring is provided with a plurality of through grooves, elastic arms are arranged in the through grooves, and positioning stop blocks corresponding to the first guide grooves and the positioning grooves are arranged on the outer sides of the elastic arms; the upper parts of the positioning stop blocks are respectively provided with a second sliding inclined plane corresponding to the first sliding inclined plane and the pressing inclined plane, and the outer sides of the positioning stop blocks are respectively provided with a transition inclined plane;

the needle seat is vertically arranged in the inner shell and is positioned at the lower part of the locking ring; the needle body is fixedly arranged on the needle seat; the lower end of the needle body is a connecting section, and the upper end of the needle body is an injection section; the connecting section of the needle body is positioned in the needle seat, and the injection section of the needle body passes through the second needle hole and the assembly hole and extends to the outside of the inner shell;

the spring is vertically arranged in the inner shell and sleeved on the outer side of the needle body; one end of the spring is abutted against the needle seat, and the other end is abutted against the top wall of the interior of the locking ring.

Further optimally, the number of the rail transfer devices is 3, and the rail transfer devices are uniformly distributed on the inner wall of the inner shell along the circumferential direction; the number of second guide grooves between two adjacent track-changing devices is 1-2.

Further preferably, the number of the guide lugs is 3-6, and the guide lugs are uniformly distributed on the outer side wall of the protective sleeve along the circumferential direction; the number of the downward pressing convex blocks is 3-6, and the downward pressing convex blocks are uniformly distributed at the lower part of the protective sleeve along the circumferential direction.

Further preferably, the cross-sectional side shapes of the pressing inclined planes are isosceles triangles.

Further preferably, the number of the through grooves is 3, and the through grooves are uniformly distributed on the side wall of the locking ring along the circumferential direction.

Further preferably, the lateral cross-sectional shape of the transition bevel is arcuate.

Further preferably, a fixed block is arranged on the outer side wall of the needle seat, and the top-view cross-section shape of the fixed block is a circular ring shape; the inner wall of the inner shell is provided with a clamping groove corresponding to the fixed block, and the fixed block is arranged in the clamping groove.

Further preferably, an outer shell is sleeved outside the inner shell.

The beneficial effects of the invention are as follows:

the safe insulin injection needle head provided by the invention can automatically hide the needle body after injection is finished, can not expose the needle body due to false touch, can avoid injury to personnel, has the function of avoiding cross infection, can prevent the risk of repeated use of the needle head, and is suitable for wide popularization and application.

Drawings

Fig. 1 is a schematic diagram of an explosive structure according to the present invention.

FIG. 2 is a schematic side cross-sectional view of the inner shell of the present invention.

FIG. 3 is a second schematic side sectional view of the inner shell of the present invention.

Fig. 4 is a schematic view of a partial enlarged structure of a portion a in fig. 3.

Fig. 5 is a schematic view of the bottom cross-sectional structure of the inner shell of the present invention.

Fig. 6 is a schematic view of the upper structure of the protective sheath of the present invention.

Fig. 7 is a schematic view of the lower structure of the protective sheath in the present invention.

Fig. 8 is a schematic view of the upper structure of the locking ring in the present invention.

Fig. 9 is a schematic view of the lower structure of the locking ring in the present invention.

Fig. 10 is a schematic cross-sectional view of the locking ring in a locked state according to the present invention.

Fig. 11 is a partially enlarged schematic view of the portion B in fig. 10.

FIG. 12 is a schematic side cross-sectional view of the assembled present invention.

In the figure, 1, an inner shell; 11. a fitting hole; 12. a track-changing device; 13. a first guide groove; 14. a positioning groove; 15. a first slide-to-incline; 16. positioning the protruding blocks; 17. a second guide groove; 18. a clamping groove;

2. a protective sleeve; 21. a first pinhole; 22. a guide projection; 23. pressing down the bump; 24. pressing down the inclined plane;

3. a locking ring; 31. a second pinhole; 32. a through groove; 33. an elastic arm; 34. positioning a stop block; 35. a second slide-to-incline; 36. a transition inclined plane;

4. a spring; 41. a needle body; 42. a needle stand; 43. a fixed block; 5. a housing.

Detailed Description

In order to clearly illustrate the technical features of the present solution, the present invention will be described in detail below with reference to the following detailed description and the accompanying drawings.

As shown in fig. 1 to 12, the present embodiment discloses a safety insulin injection needle, which comprises an inner case 1, a protective sleeve 2, a locking ring 3, a spring 4, a needle body 41 and a needle seat 42.

The main body structure of the inner shell 1 is a cylinder. An assembly hole 11 is formed in the top of the inner shell 1; a plurality of track-changing devices 12 (shown in figures 2-5) are arranged on the inner wall of the inner shell 1; the track-changing device 12 comprises a first guide groove 13 and a positioning groove 14 which are adjacent; a first sliding inclined surface 15 is arranged between the first guiding groove 13 and the positioning groove 14; positioning convex blocks 16 are arranged in the positioning grooves 14; a plurality of second guide grooves 17 are provided between two adjacent track-change devices 12.

The main structure of the protective sleeve 2 is a cylinder; the protective sleeve 2 is vertically arranged inside the inner shell 1, and the upper part of the protective sleeve 2 extends to the outside of the inner shell 1 through the assembly hole 11. A first needle hole 21 is formed at the top of the protective sleeve 2 for exposing the needle body 41 during injection. A plurality of guide convex blocks 22 (shown in fig. 6-7) corresponding to the first guide grooves 13 and the second guide grooves 17 are arranged on the outer side wall of the protective sleeve 2, and the guide convex blocks 22 are respectively positioned in the corresponding first guide grooves 13 and the second guide grooves 17 to play a role in guiding, so that the protective sleeve 2 can move up and down along the axial direction inside the inner shell 1. A plurality of downward pressing convex blocks 23 are arranged at the lower part of the protective sleeve 2, and downward pressing inclined planes 24 are arranged at the bottoms of the downward pressing convex blocks 23.

The main body structure of the lock ring 3 is a cylinder; the upper part of the locking ring 3 is movably arranged in the protective sleeve 2; a second pinhole 31 is formed at the top of the locking ring 3; the side wall of the locking ring 3 is provided with a plurality of through grooves 32, elastic arms 33 are arranged in the through grooves 32, positioning stop blocks 34 (shown in fig. 8-9) corresponding to the first guide grooves 13 and the positioning grooves 14 are arranged on the outer sides of the elastic arms 33, and before use, the positioning stop blocks 34 are respectively positioned in the corresponding first guide grooves 13 to play a role in guiding, so that the locking ring 3 can move up and down in the inner shell 1 along the axial direction. The upper parts of the positioning stop blocks 34 are respectively provided with a second sliding inclined surface 35 corresponding to the first sliding inclined surface 15 and the pressing inclined surface 24, and the outer sides of the positioning stop blocks 34 are respectively provided with a transition inclined surface 36.

The needle holder 42 is vertically disposed inside the inner housing 1 and is located at the lower portion of the locking ring 3 for mounting insulin injections. The needle body 41 is fixedly arranged on the needle seat 42; the lower end of the needle body 41 is a connecting section, and the upper end of the needle body 41 is an injection section. The connecting section of the needle body 41 is positioned in the needle seat 42 and is used for connecting injection; the injection section of the needle body 41 passes through the second needle hole 31 and the fitting hole 11 and extends to the outside of the inner housing 1 for injecting an injection into a patient.

The spring 4 is vertically arranged inside the inner shell 1, and the spring 4 is sleeved outside the needle body 41; one end of the spring 4 rests against the hub 42 and the other end rests against the top wall of the interior of the locking ring 3.

The working principle of the invention is as follows:

before use, insulin injection is installed on the needle seat 42, and the connecting section of the needle body is connected with the injection. At this time, the positioning stoppers 34 of the locking ring 3 are located in the corresponding first guide grooves 13, and the second sliding inclined surfaces 35 of the locking ring 3 are abutted against the corresponding pressing inclined surfaces 24. Since the injection section of the needle body 41 is positioned in the protective sleeve 2, the needle tip can be prevented from injuring other people accidentally, and the safety protection effect is achieved.

In use, the top of the protective sleeve 2 is pressed against the injection site of the skin of the patient, and then the protective sleeve 2 is pressed down by force, and moves into the inner case 1, exposing the injection section of the needle body 41, and injecting. During the pressing down of the protective sleeve 2, the second sliding inclined surface 35 is pushed by the pressing down inclined surface 24, so that the lock ring 3 is synchronously pressed down, and the spring 4 is compressed by pressure. During the pressing down of the locking ring 3, the positioning stopper 34 moves downward in the first guide groove 13, so that the position of the second slide-to-inclined surface 35 in the horizontal direction is gradually lower than the position of the first slide-to-inclined surface 15 in the horizontal direction.

After injection is completed, when the needle is pulled out, the protective sleeve 2 is separated from the human body, so that the spring 4 rebounds and gradually returns to the length before compression, and the protective sleeve 2 and the lock ring 3 move upwards under the pushing action of the spring 4. The protective sheath 2 is raised to a position before being pushed down, and the needle body 41 is protected from being exposed. The second sliding inclined surface 35 slides along the first sliding inclined surface 15 during the rising process, so that the locking ring 3 rotates at a certain angle, and the positioning stop block 34 slides into the adjacent positioning groove 14 from the first guiding groove 13 (as shown in fig. 10-11).

Under the further pushing action of the spring 4, the positioning stop block 34 continues to move upwards in the positioning groove 14, and as the thin-wall structure of the elastic arm 33 has good elasticity and deformation capability, when the positioning stop block 34 is in contact with the positioning projection 16, the elastic arm 33 can deform towards the inner direction of the locking ring 3 and drive the positioning stop block 34 to move towards the inner direction of the locking ring 3, the blocking effect of the positioning projection 16 is reduced, the transition inclined surface 36 is in contact with the positioning projection 16 to generate transition sliding, the positioning stop block 34 moves to the upper part of the positioning projection 16, the bottom of the positioning stop block 34 is in contact with the top of the positioning projection 16, the positioning stop block 34 can be clamped on the positioning projection 16, the locking ring 3 cannot move downwards, and the positioning self-locking effect on the locking ring 3 is realized. Through the supporting effect of the second sliding inclined plane 35 on the downward pressing inclined plane 24, the protective sleeve 2 cannot be pressed down under the action of external force, and then the injection section of the needle body 41 is automatically hidden and cannot be exposed, so that the protective sleeve has the protective effect and avoids injury to personnel.

After use, the positioning block 34 slides into the positioning groove 14 and plays a role in positioning through the positioning protruding block 16, so that the protective sleeve 2 cannot be pressed down and cannot be restored to the original use state, and the needle is marked as used, so that the risk of repeated use of the needle is prevented.

As a preferred embodiment, the number of the track-changing devices 12 is 3, and the track-changing devices are uniformly distributed on the inner wall of the inner shell 1 along the circumferential direction; the number of second guide grooves 17 between two adjacent track-change devices 12 is 1-2.

As a preferred embodiment, the number of the guide protrusions 22 is 3-6, and the guide protrusions are uniformly distributed on the outer side wall of the protective cover 2 along the circumferential direction; the number of the pressing projections 23 is 3-6, and the pressing projections are uniformly distributed at the lower part of the protective sleeve 2 along the circumferential direction.

As a preferred embodiment, the side cross-sectional shapes of the pressing inclined surface 24 are isosceles triangles, so that the second sliding inclined surface 35 is convenient to contact with the pressing inclined surface 24, and the positioning block 34 is convenient to slide into the positioning groove 14 from the first guiding groove 13.

As a preferred embodiment, the number of the through grooves 32 is 3, and the through grooves are uniformly distributed on the side wall of the locking ring 3 along the circumferential direction.

As a preferred embodiment, the cross-sectional side shape of the transition ramp 36 is arcuate to reduce friction caused by contact with the positioning tab 16 as the positioning tab 34 moves upward, facilitating movement of the positioning tab 34 to the upper portion of the positioning tab 16.

As a preferred embodiment, a fixing block 43 is provided on the outer side wall of the needle holder 42, and the fixing block 43 has a circular cross-sectional shape in a plan view (as shown in fig. 12); a clamping groove 18 (as shown in fig. 2-3) corresponding to the fixing block 43 is arranged on the inner wall of the inner shell 1, and the fixing block 43 is arranged in the clamping groove 18, so that the needle seat 42 is fixed inside the inner shell 1.

As a preferred embodiment, an outer shell 5 is provided around the outer side of the inner shell 1. Before the syringe needle uses, shell 5 can play the guard action to protective sheath 2, prevents protective sheath 2 from producing because of external force and pushing down and making needle body 41 expose, causes the injury to the personnel. In addition, after the injection needle is used up, the outer shell 5 is sleeved on the inner shell 1, so that the protection effect can be further achieved, and accidental injury of the needle to other people is avoided when medical waste is treated.

In summary, the safe insulin injection needle head provided by the invention can automatically hide the needle body after injection is completed, can not expose the needle body due to false touch, can avoid injury to personnel, has the function of avoiding cross infection, and can prevent the risk of repeated use of the needle head.

The present invention is not described in detail in the present application, and is well known to those skilled in the art. Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.

Claims

1. The utility model provides a safe insulin syringe needle, includes inner shell (1), protective sheath (2), catch (3), spring (4), needle body (41) and needle file (42), its characterized in that:

the main body structure of the inner shell (1) is a cylinder; an assembly hole (11) is formed in the top of the inner shell (1); a plurality of track-changing devices (12) are arranged on the inner wall of the inner shell (1); the track-changing device (12) comprises adjacent first guide grooves (13) and positioning grooves (14); a first sliding inclined plane (15) is arranged between the first guide groove (13) and the positioning groove (14);

positioning convex blocks (16) are arranged in the positioning grooves (14); a plurality of second guide grooves (17) are arranged between two adjacent track-changing devices (12);

the main structure of the protective sleeve (2) is a cylinder; the protective sleeve (2) is vertically arranged inside the inner shell (1), and the upper part of the protective sleeve (2) extends to the outside of the inner shell (1) through the assembly hole (11); a first pinhole (21) is formed in the top of the protective sleeve (2); a plurality of guide convex blocks (22) corresponding to the first guide grooves (13) and the second guide grooves (17) are arranged on the outer side wall of the protective sleeve (2); the guide convex blocks (22) are respectively positioned in the corresponding first guide groove (13) and second guide groove (17), a plurality of downward-pressing convex blocks (23) are arranged at the lower part of the protective sleeve (2), and downward-pressing inclined planes (24) are respectively arranged at the bottoms of the downward-pressing convex blocks (23);

the main body structure of the lock ring (3) is a cylinder; the upper part of the lock ring (3) is movably arranged in the protective sleeve (2); a second pinhole (31) is formed at the top of the locking ring (3); a plurality of through grooves (32) are formed in the side wall of the locking ring (3), elastic arms (33) are arranged in the through grooves (32), and positioning stop blocks (34) corresponding to the first guide grooves (13) and the positioning grooves (14) are arranged on the outer sides of the elastic arms (33); the positioning stop blocks (34) are respectively positioned in the corresponding first guide grooves (13), the upper parts of the positioning stop blocks (34) are respectively provided with a second sliding inclined surface (35) corresponding to the first sliding inclined surface (15) and the pressing inclined surface (24), and the outer sides of the positioning stop blocks (34) are respectively provided with a transition inclined surface (36);

the needle seat (42) is vertically arranged in the inner shell (1) and is positioned at the lower part of the locking ring (3); the needle body (41) is fixedly arranged on the needle seat (42); the lower end of the needle body (41) is a connecting section, and the upper end of the needle body (41) is an injection section; the connecting section of the needle body (41) is positioned in the needle seat (42), and the injection section of the needle body (41) passes through the second needle hole (31) and the assembly hole (11) and extends to the outside of the inner shell (1);

the spring (4) is vertically arranged in the inner shell (1), and the spring (4) is sleeved on the outer side of the needle body (41); one end of the spring (4) is abutted against the needle seat (42), and the other end is abutted against the top wall of the interior of the lock ring (3);

the number of the track-changing devices (12) is 3, and the track-changing devices are uniformly distributed on the inner wall of the inner shell (1) along the circumferential direction; the number of the second guide grooves (17) between two adjacent track-changing devices (12) is 1-2;

a fixed block (43) is arranged on the outer side wall of the needle seat (42), and the top cross section of the fixed block (43) is circular; the inner wall of the inner shell (1) is provided with a clamping groove (18) corresponding to the fixing block (43), and the fixing block (43) is arranged in the clamping groove (18).

2. The safety insulin injection needle according to claim 1, wherein: the number of the guide lugs (22) is 3-6, and the guide lugs are uniformly distributed on the outer side wall of the protective sleeve (2) along the circumferential direction; the number of the pressing projections (23) is 3-6, and the pressing projections are uniformly distributed at the lower part of the protective sleeve (2) along the circumferential direction.

3. The safety insulin injection needle according to claim 2, wherein: the cross-sectional side shapes of the pressing inclined planes (24) are isosceles triangles.

4. The safety insulin injection needle according to claim 1, wherein: the number of the through grooves (32) is 3, and the through grooves are uniformly distributed on the side wall of the locking ring (3) along the circumferential direction.

5. The safety insulin injection needle according to claim 4, wherein: the cross-sectional side shape of the transition bevel (36) is arc-shaped.

6. The safety insulin injection needle according to claim 1, wherein: an outer shell (5) is sleeved outside the inner shell (1).