CN215961565U

CN215961565U - Safety syringe with retractable needle point

Info

Publication number: CN215961565U
Application number: CN202121446666.1U
Authority: CN
Inventors: 王静波; 孙荣瑾; 陆舒婷; 王佳婧; 张理
Original assignee: Jiangsu Food and Pharmaceutical Science College
Current assignee: Jiangsu Food and Pharmaceutical Science College
Priority date: 2021-06-28
Filing date: 2021-06-28
Publication date: 2022-03-08
Anticipated expiration: 2031-06-28

Abstract

The utility model relates to the field of syringes, in particular to a safety syringe with a retractable needle point. Including injection tube, push rod, piston and syringe needle, the upper end activity of injection tube is provided with the needle file, be provided with the syringe needle seat in the needle file, the syringe needle sets up in the syringe needle seat, the tip of push rod is provided with latch device, latch device can with the needle file joint with its lapse pulling, still be equipped with the elastic component on the latch device, the elastic component can with syringe needle seat joint, make syringe needle seat slope. The novel needle seat can be recycled into the injection tube and can not move downwards, and the upper end surface of the needle seat is lower than that of the injection tube, so that the needle seat can be completely prevented from being stretched out again for injection tube utilization. The elastic piece can recover the needle seat and the needle into the injection tube, and then the needle seat and the needle incline under the action of the elastic piece, so that the needle is self-destroyed and difficult to reuse.

Description

Safety syringe with retractable needle point

Technical Field

The utility model relates to the field of syringes, in particular to a safety syringe with a retractable needle point.

Background

In modern medicine, syringes are common medical devices and play an important role in patient examination and treatment, and disposable safety syringes are increasingly used particularly with the increase of the level of medical services.

In order to prevent the transmission of infectious diseases caused by mistaken puncturing of the needle point of the syringe after use or the reuse of the discarded syringe after being recovered by lawless persons, which causes the secondary diffusion of viruses and diseases, the needle point of the safety syringe with the retractable needle point retracts into the syringe barrel after use to complete the self-destruction, thereby avoiding the mistaken puncturing of the needle point and the recovery of the syringe by the lawless persons and further avoiding the occurrence of medical and health problems.

In the existing safety syringe with a retractable needle tip, application number 201310148940.0 is that a core rod is clamped on a needle base, and after injection is completed, the needle base is driven to be pulled back into an injection tube to complete retraction of the needle tip, so that self-destruction is realized. However, it is still difficult to prevent a lawless person from completely extracting the core rod and the needle base from the syringe, separating the core rod and the needle base, and then reinstalling the core rod and the needle base again to assemble a new syringe.

Therefore, the technology still does not completely solve the problem of self-destruction after the needle point retracts, and further does not solve the safety problem of recycling the syringe.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems, the utility model aims to provide a safety syringe with a retractable needle point, which can realize the self-destruction of a needle head and a needle head seat, thoroughly realize the self-destruction of the syringe after use and achieve the safe technical effect.

In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:

the utility model provides a safety syringe that needle point can be retrieved, includes injection tube, push rod, piston and syringe needle, the upper end activity of injection tube is provided with the needle file, be provided with the syringe needle seat in the needle file, the syringe needle sets up in the syringe needle seat, the upper end of push rod is provided with latch device, latch device can with needle file joint with its lapse pulling, still be equipped with the elastic component on the latch device, the elastic component can with syringe needle seat joint, make syringe needle seat slope.

Clamping device includes fixed column, first joint spare and second joint spare, the fixed column sets up in the upper end of push rod, first joint spare integrated into one piece is in the periphery of fixed column, second joint spare integrated into one piece is in the up end of fixed column, the elastic component slope sets up in the up end of second joint spare.

The inner wall of the needle base is provided with a first clamping groove matched with the first clamping piece, the lower part of the needle base is communicated with a second clamping hole and an elastic hole, the second clamping piece is clamped in the second clamping hole, and the elastic piece is clamped in the elastic hole.

The first clamping piece is provided with a rubber sleeve.

The outer wall of the needle seat is provided with a groove, and the inner wall of the injection tube is provided with a limiting ring matched with the groove.

The needle head seat is internally provided with a through hole for communicating the needle head and the elastic hole.

Compared with the prior art, the utility model has the beneficial effects that:

1. the needle seat can be recovered into the injection tube, the needle seat can not move downwards due to the limitation of the limiting ring after being recovered into the injection tube, and the upper end surface of the needle seat is lower than the upper end surface of the injection tube, so that the needle seat can be completely prevented from extending out of the injection tube again for utilization;

2. this novel elastic component can retrieve syringe barrel with syringe needle seat and syringe needle in, then makes syringe needle seat and syringe needle slope under the effect of elastic component, is that the syringe needle takes place self-destruction, is difficult to reuse.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model.

In the drawings:

FIG. 1 is a front cross-sectional view of the clip assembly of the present invention shown separated from the needle hub.

Fig. 2 is an enlarged view of a portion a in fig. 1.

Fig. 3 is an enlarged view of a portion C in fig. 1.

Fig. 4 is an enlarged view of a portion B in fig. 1.

FIG. 5 is a front cross-sectional view of the latch of the present invention with the needle mount.

Fig. 6 is a front cross-sectional view of the needle hub retracted syringe of the present invention.

FIG. 7 is a front cross-sectional view of the needle self-destruction of the present invention.

Fig. 8 is an enlarged view of portion D of fig. 7 according to the present invention.

Wherein: 1. the syringe comprises a syringe barrel, a push rod, a piston, a first clamping groove, a needle seat, a through hole, a needle seat, a needle head, a fixed column, a first clamping piece, a rubber sleeve, a second clamping piece, a first elastic piece, a rubber sleeve, a second clamping piece, a second elastic piece, a first clamping piece, a rubber sleeve, a second clamping piece, a first clamping piece, a rubber sleeve, a second clamping piece, a first clamping piece, a second clamping hole and a limiting ring, wherein the push rod is 2, the piston is 3, the first clamping groove is 4, the groove is 5, the needle seat is 6, the through hole is 7, the needle head seat is 8, the rubber sleeve is 9, the fixed column is 10, the first clamping piece, the rubber sleeve is 12, the rubber sleeve is 13, the second clamping piece, the elastic piece is 15, the elastic hole, the second clamping hole is 16, and the limiting ring.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.

Example (b):

referring to fig. 1 to 8, a safety syringe with a retractable needle point comprises a syringe 1, a push rod 2 and a needle 9, wherein the push rod 2 is arranged in the syringe 1, the piston 3 is arranged at the end of the push rod 2 in the syringe 1, and the end of the push rod 2 extends through the piston 3. The upper end of the injection tube 1 is movably provided with a needle seat 6, one part of the needle seat 6 is positioned in the injection tube 1, and the other part penetrates out of the upper part of the injection tube 1. A needle seat 8 is arranged in the needle seat 6, and the upper end of the needle seat 8 is flush with the upper end of the needle seat 6. The lower end of the needle 9 is fixedly arranged in the needle seat 8, the upper end part of the push rod 2 is provided with a clamping device, the clamping device can be clamped with the needle seat 6 to pull the needle seat downwards, so that the needle seat 6 is recovered into the injection tube 1, the clamping device is further provided with an elastic piece 14, the elastic piece 14 can be clamped with the needle seat 8, when the needle seat 8 is pulled down into the injection tube 1, the needle seat 8 loses the limiting support of the needle seat 6, is inclined under the elastic force action of the elastic piece 14, and the needle tip end of the needle is tightly attached to the inner wall of the injection tube 1, so that the needle tip is difficult to be pushed out from the upper end part of the injection tube 1, and self-destruction is completed.

Clamping device includes fixed column 10, first joint spare 11 and second joint spare 13, fixed column 10 integrated into one piece is in the up end of

push rod

2, 11 integrated into one piece of first joint spare are in the periphery of fixed column 10, first joint spare 11 is the cuboid structure, be provided with elastic rubber sleeve 12 on the

first joint spare

11, 13 integrated into one piece of second joint spare are in the up end of fixed column 10, the slope of elastic component 14 sets up in the up end of second joint spare 13.

The inner wall of needle file 6 is seted up with first joint spare 11 complex first joint groove 4, the distance between the interior bottom surface of first joint groove 4 and the lower terminal surface of base 6 equals the distance between the up end of the lower terminal surface of rubber sleeve 12 and the up end of push rod 2. The lower part of the needle head seat 8 is provided with a second clamping hole 16 and an elastic hole 15 in a penetrating way, the second clamping piece 13 is clamped in the second clamping hole 16, and the elastic piece 14 is clamped in the elastic hole 15. In use, the elastic member 14 is pushed upward and is pressed into the elastic hole 15 by its own elastic force.

The outer wall of the needle seat 6 is provided with a groove 5, the length of the groove 5 is the same as the length of the part of the needle seat 8 exposed out of the injection tube 1, and the inner wall of the injection tube 1 is provided with a limit ring 17 matched with the groove 5.

During the use, push rod 2 inwards promotes, when accomplishing the injection, makes its and first joint spare 11 and the inseparable joint of first joint groove 4 through the extrusion at rubber sleeve 12, and second joint spare 13 and the joint of second joint hole 16 simultaneously, and elastic component 14 joint is in elastic hole 15.

The push rod 2 is pulled outwards, the needle seat 6 is retracted into the injection tube 1, the upper end surface is also positioned in the injection tube 1, and the needle seat 16 is limited at the upper part of the injection tube 1 due to the limit of the limit ring 17. Then continue to drop down, rubber sleeve 12 and first joint spare 11 deviate from first joint groove 4, and syringe needle seat 8 moves down, after syringe needle seat 8 breaks away from the restriction of needle file 6 completely, under the effect of the restoring force of elastic component 14, will make it slope, and the needle point of syringe needle 9 will hug closely the inner wall of injection tube 1 simultaneously, accomplishes the self-destruction of syringe needle 9.

The needle head seat 8 is internally provided with a through hole 7 which is communicated with the needle head 9 and the elastic hole 15, and the liquid medicine in the injection tube 1 can flow into the needle head 9 through the through hole 7 to finish injection.

The principle and the using process of the utility model are as follows:

the push rod 2 is pushed to move inwards to complete injection, when the piston 3 is completely attached to the lower end face of the needle seat 6, the first clamping piece 11 is clamped into the first clamping groove 4, the second clamping piece 13 is clamped in the second clamping hole 16, and the elastic piece 14 is clamped in the elastic hole 15. Then the push rod 2 is pulled outwards, the needle base 6 retracts into the injection tube 1, the pulling outwards is continued, the needle base 6 is separated from the needle base 8, the needle base 8 tilts under the action of the elastic piece 14, the needle point of the needle 9 is enabled to be tightly attached to the inner wall of the injection tube 1, and the self-destruction of the needle 9 is completed.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A safety syringe with a retractable needle point comprises a syringe (1), a push rod (2), a piston (3) and a needle (9), and is characterized in that: the upper end activity of injection tube (1) is provided with needle file (6), be provided with syringe needle seat (8) in needle file (6), syringe needle (9) set up in syringe needle seat (8), the upper end of push rod (2) is provided with latch device, latch device can with needle file (6) joint with its lapse drawing, still be equipped with elastic component (14) on the latch device, elastic component (14) can with syringe needle seat (8) joint, make syringe needle seat (8) slope.

2. A safety syringe according to claim 1 in which the needle tip is retractable, the safety syringe comprising: clamping device includes fixed column (10), first joint spare (11) and second joint spare (13), fixed column (10) set up in the upper end of push rod (2), first joint spare (11) integrated into one piece is in the periphery of fixed column (10), second joint spare (13) integrated into one piece is in the up end of fixed column (10), elastic component (14) slope sets up in the up end of second joint spare (13).

3. A safety syringe according to claim 2 in which the needle tip is retractable, the safety syringe comprising: the inner wall of the needle base (6) is provided with a first clamping groove (4) matched with the first clamping piece (11), the lower part of the needle head base (8) is provided with a second clamping hole (16) and an elastic hole (15) in a penetrating mode, the second clamping piece (13) is clamped in the second clamping hole (16), and the elastic piece (14) is clamped in the elastic hole (15).

4. A safety syringe according to claim 3 in which the needle tip is retractable, the safety syringe comprising: the first clamping piece (11) is provided with a rubber sleeve (12).

5. A safety syringe according to claim 4 in which the needle tip is retractable, the safety syringe further comprising: the outer wall of the needle seat (6) is provided with a groove (5), and the inner wall of the injection tube (1) is provided with a limit ring (17) matched with the groove (5).

6. A safety syringe according to claim 5 in which the needle tip is retractable, the safety syringe comprising: the needle head seat (8) is internally provided with a through hole (7) for communicating the needle head (9) and the elastic hole (15).