CN214074553U

CN214074553U - Self-destruction type needle head connecting structure and self-destruction type puncture-proof syringe

Info

Publication number: CN214074553U
Application number: CN202021954210.1U
Authority: CN
Inventors: 郭春; 朱小鹏
Original assignee: Zhejiang Kangkang Medical Devices Co Ltd
Current assignee: Zhejiang Kangkang Medical Devices Co Ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-08-31
Anticipated expiration: 2030-09-09

Abstract

The utility model discloses a self-destruction syringe needle connecting structure, which comprises an outer needle seat, a needle body and a needle protective cap, wherein a positioning hole and a mounting hole are arranged in the outer needle seat, a positioning switch is arranged in the positioning hole, an inner needle seat is arranged in the mounting hole, and the needle body is fixedly connected with the inner needle seat; a plurality of elastic inner buckling positioning claws are uniformly arranged on the circumference of the end part of the positioning switch at intervals and form positioning through holes, and a positioning step and a buckle releasing step are respectively arranged at one end of the inner needle base corresponding to the positioning switch; the end part of the inner needle base penetrates through the positioning through hole and is abutted against the elastic inner buckling positioning claw through the positioning step, and the positioning switch is fixedly arranged in the positioning hole. The utility model discloses effectively prevent to connect the in-process of syringe needle before the use, the condition that the needle body takes place to slide, drop, convenient to operate and use, avoid causing the waste, improve the security of using. The utility model also discloses a self-destruction type puncture-proof injector adopting the self-destruction type needle head connecting structure.

Description

Self-destruction type needle head connecting structure and self-destruction type puncture-proof syringe

Technical Field

The utility model relates to the technical field of syringes, concretely relates to self-destruction formula syringe needle connection structure and self-destruction formula prevent syringe that punctures.

Background

The self-destruction injector is an effective injector which is generally circulated in the market and prevents secondary utilization, and well ensures the sanitation and safety. The existing self-destruction syringes have two self-destruction modes, one is a self-destruction mode of breaking a push rod in a syringe and locking, and the other is a self-destruction mode of a needle head.

The needle self-destruction structure can achieve the self-destruction purpose and prevent puncture after use, so the needle is widely used, and the structure adopted by the needle self-destruction structure in the market is as follows: the structure of needle body location in the syringe needle sets up on the connection awl mouth of cylinder tip, before the injection, the location that the needle body in the syringe needle goes on through the location structure on the connection awl mouth, after the injection use, the push rod tip is provided with and can removes the location to the needle body with connecting the location structure on the awl mouth to in taking the cylinder, reaching the purpose of syringe needle self-destruction through the push rod.

The self-destruction type syringe needle structure has the advantages that the needle body in the syringe needle can slide relatively in the self-destruction type syringe needle structure, the needle body in the syringe needle can be positioned by the positioning structure which is connected with the conical nozzle at the end part of the syringe needle after the syringe needle is connected with the syringe needle, but the needle seat does not have a good structure for positioning the needle body before the syringe needle is connected, and the needle body slides or falls off relative to the needle seat easily in the process of connecting the syringe needle and the syringe needle, so that the syringe needle structure cannot be connected for use, and waste is caused; accordingly, further improvements in self-destruct needle and syringe structures are needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems in the prior art and providing a self-destruction type needle head connecting structure and a self-destruction type puncture-proof injector.

In order to achieve the above purpose, the technical scheme of the utility model is that: a self-destruction syringe needle connecting structure comprises an outer needle base, a needle body and a needle protection cap, wherein a positioning hole and a mounting hole are formed in the outer needle base; a plurality of elastic inner buckling positioning claws are uniformly arranged on the circumference of the end part of the positioning switch at intervals and form positioning through holes, and a positioning step and a buckle releasing step are respectively arranged at one end of the inner needle base corresponding to the positioning switch; the end part of the inner needle base penetrates through the positioning through hole and is abutted against the elastic inner buckling positioning claw through the positioning step, and the positioning switch is fixedly arranged in the positioning hole.

In the self-destruction type needle head connecting structure, an elastic sealing thin ring is arranged between the inner needle base and the mounting hole.

In the self-destruction type needle head connecting structure, the end part of the mounting hole and the inner needle base are respectively provided with a matched positioning sealing cone part.

In the self-destruction type needle head connecting structure, the elastic sealing thin ring is arranged at the positioning sealing conical part between the mounting hole and the inner needle seat.

In the self-destruction type needle head connecting structure, the positioning step, the releasing buckle step and the central axis of the positioning switch are not vertical.

In the self-destruction type needle head connecting structure, a positioning boss which forms a positioning clamp for the positioning switch is arranged in the positioning hole.

A self-destruction type puncture-proof injector adopting the self-destruction type needle head connecting structure comprises a needle cylinder and a push rod, wherein a connecting conical nozzle is arranged at the end part of the needle cylinder, a piston is arranged at the end part of the push rod, a needle seat positioning column is arranged in the connecting conical nozzle, a thinning cavity is arranged in the piston, an outer needle seat is connected with the needle seat positioning column, a return pull rod is arranged at the end part of the push rod, a hanging buckle hole is formed in the end part of the return pull rod, and a hanging buckle boss is arranged in the hanging buckle hole; the pull-back rod can penetrate through the needle seat positioning column to open the elastic inner buckling positioning claw of the outer needle seat positioning switch, and the hanging buckle boss arranged in the hanging buckle hole at the end part of the pull-back rod can form a buckle with the buckle releasing step at the end part of the inner needle seat.

In the self-destruction puncture-proof injector, a thin extrusion cavity is arranged in the piston.

Adopt above technical scheme, the utility model discloses following beneficial effect has:

compared with the prior art, the utility model discloses be provided with positioning switch in the outer needle file, positioning switch fixes and can not withdraw from in the outer needle file, and one kind keeps the location fixed to interior needle file before the injection uses, and the needle body is connected fixedly with interior needle file to effectively prevent the in-process of connecting the syringe needle before using, the condition that the needle body takes place to slide, drops, convenient to operate and use, avoid causing the waste.

Compared with the prior art, the utility model discloses a when the syringe needle is connected with the connection awl mouth of syringe cylinder tip, at the in-process of the tight syringe needle of medical personnel's habit operation, it can be tight to the positioning switch top to connect awl mouth in-connection reference column to make mounting hole and interior needle holder location sealing pyramis between them realize supporting once more and lean on sealedly, prevent to use the risk of leaking.

Compared with the prior art, the injector of the utility model can be matched and connected with the needle head structure better, and the pull-back rod at the end part of the push rod can pull the inner needle base and the needle body communicated with the inner needle base more stably into the needle cylinder after the injection use; because the location step on the interior needle file, remove between buckle step and the central axis of positioning switch non-perpendicularly, in case interior needle file is pulled down to the cylinder in the drive of push rod, support between pull-back rod tip and the interior needle file location step when later pull push rod once more and lean on there is the slope contained angle push rod, thereby make the motion between push rod and the interior needle file be not on same central axis, consequently the needle body can not normally move away along the hole site in connecting the awl mouth on the interior needle file, further avoided the overuse and prevented that the user from being stabbed.

Drawings

FIG. 1 is a cross-sectional view of a needle of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an exploded perspective view of the needle of the present invention;

FIG. 4 is a plan view of the inner hub of the needle head structure of the present invention;

FIG. 5 is a cross-sectional view of the syringe (after injection and when entering the self-destruction state) of the present invention;

fig. 6 is an enlarged view of a portion B of fig. 5.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Referring to fig. 1 to 4, the utility model provides a self-destruction type needle head connection structure, which comprises an outer needle base 1, a needle body 2 and a needle protection cap 3, wherein a positioning hole 4 and a mounting hole 5 are arranged in the outer needle base 1, a positioning switch 6 is arranged in the positioning hole 4, an inner needle base 7 is arranged in the mounting hole 5, and the needle body 2 is fixedly connected with the inner needle base 7; a plurality of elastic inner buckling positioning claws 8 are uniformly arranged on the circumference of the end part of the positioning switch 6 at intervals and form positioning through holes 9, and a positioning step 10 and a buckle releasing step 11 are respectively arranged at one end of the inner needle base 7 corresponding to the positioning switch 6; the end part of the inner needle base 7 penetrates through the positioning through hole 9 and is abutted against the elastic inner-buckled positioning claw 8 through the positioning step 10, and a positioning boss 12 for positioning and clamping the positioning switch 6 is arranged in the positioning hole 4, so that the positioning switch 6 is fixedly arranged in the positioning hole 4.

Before the needle is used for injection connection, the positioning switch 6 is fixed in the outer needle base 1 and cannot withdraw, the positioning switch 6 keeps the positioning of the inner needle base 7 against, the inner needle base 7 keeps positioning and fixing all the time before the needle is used for injection, and the needle body 2 is connected and fixed with the inner needle base 7; in the process that medical personnel take out the syringe needle and be connected with the cylinder, the location connection of needle body is firm always, the condition that slides, drop can not appear, and medical personnel's operation connection need not worry with the careful wing like this and considers, and the medical personnel's of being convenient for operation is used, avoids causing the waste.

Furthermore, the end of the mounting hole 5 and the inner needle base 7 are respectively provided with a matched positioning sealing cone 13, and an elastic sealing thin ring 14 is further arranged at the positioning sealing cone 13 between the inner needle base 7 and the mounting hole 5; thereby further improving the sealing property of the connection.

Further, the positioning step 10 and the releasing buckle step 11 are not perpendicular to the central axis of the positioning switch 6, so that the movement direction of the positioning switch in the released limit is changed.

Referring to fig. 5 and 6, the present invention further provides a self-destructive anti-puncturing syringe using the self-destructive needle head connection structure, which includes a syringe 15 and a push rod 16, wherein the end of the syringe 15 is provided with a connection cone 17, the end of the push rod 16 is provided with a piston 18, the connection cone 17 is internally provided with a needle seat positioning post 19, the outer needle seat 1 is connected with the needle seat positioning post 19, the end of the push rod 16 is provided with a pull back rod 20, the pull back rod 20 can be arranged as required to be in a split or integrated structure with the end of the push rod 16, the end of the pull back rod 20 is provided with a hanging buckle hole 21, and the hanging buckle hole 21 is internally provided with a hanging buckle boss 22; the pull-back rod 20 can pass through the needle seat positioning column 19 to open the elastic inner-buckling positioning claw 8 of the inner positioning switch 6 in the outer needle seat 1, and the hanging buckle boss 22 arranged in the hanging buckle hole 21 at the end part can form a buckle with the releasing buckle step 11 at the end part of the inner needle seat 7.

Furthermore, a thinning cavity 23 is arranged in the piston 18, so that the piston is more labor-saving to be thinned, and the pull rod at the end part of the push rod is easier to remove the positioning effect of the positioning switch on the inner needle base.

The principle of the self-destruction needle and the injector of the present invention is explained as follows:

referring to fig. 1 to 6, when in use, a medical worker operates to connect a needle with an injector, the outer needle base 1 of the needle is connected with the connecting conical nozzle 17 on the needle cylinder 15, wherein the needle base positioning column 19 in the connecting conical nozzle 17 is located in the positioning hole 4 of the outer needle base 1, the medical worker is used to operate the needle tightly in the connecting process, the connecting and pressing force can tightly press the positioning switch 6 through the end part of the needle base positioning column 19, so that the mounting hole 5 and the inner needle base 7 are pressed against and sealed again at the positioning sealing conical part 13 and under the matching of the arranged elastic sealing thin ring 14, and the risk of leakage in the connection use of the needle is prevented.

When the needle head is connected and the liquid medicine needs to be extracted, the push rod 16 drives the piston 18 to move, and excessive pushing force is not needed at the moment, so that the piston 18 is prevented from being compressed to enable the end part pull rod 20 to push the positioning switch 6 open to remove the positioning limitation on the inner needle base 7; after the injection is finished, the push rod 16 and the thinning cavity 23 in the piston 18 are pushed forcibly to be thinned, the forward stroke of the pull-back rod 20 at the end part of the push rod 16 is prolonged due to the thinning of the piston, the end part of the pull-back rod 20 stretches the elastic inner buckle positioning claw 8 so as to release the positioning of the positioning switch 6 on the inner needle seat 7, the buckle hanging boss 22 in the buckle hanging hole 21 at the end part of the pull-back rod 20 and the buckle releasing step 11 on the inner needle seat 7 form a buckle, so that the inner needle seat 7 and the needle body 2 on the inner needle seat 7 can be pulled into the needle cylinder 15 through the pull-back push rod 16, and the purpose of self-destruction is achieved through combination.

Because the positioning step 10 of the needle head inner needle seat 7, the non-perpendicularity between the releasing buckle step 11 and the central axis of the positioning switch 6, namely the positioning step 10 of the inner needle seat 7 and the releasing buckle step 11 are inclined planes, the end part of the return pull rod 20 on the end part of the push rod 16 is enabled to be in an inclined included angle with the positioning step 10, and the releasing buckle step 11 is enabled to be abutted against the inclined included angle, so that when the push rod 16 is pushed and pulled again under the state that the inner needle seat 7 and the needle body 2 are in the needle cylinder 15, the movement direction of the inner needle seat 7 and the movement direction of the push rod 16 are not on the same central axis, and the movement directions of the inner needle seat and the push rod form an included angle, the needle body 2 on the inner needle seat 7 can not normally move out along the hole position on the needle cylinder 15, and further secondary use and puncture injury of a user are avoided.

The self-destruction type needle head connecting structure and the self-destruction type puncture-proof injector provided by the embodiment of the utility model are described in detail, the principle and the implementation mode of the utility model are explained by applying specific examples, and the description of the above embodiments is only used for helping to understand the technical scheme disclosed by the utility model; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides a self-destruction formula syringe needle connection structure, includes outer needle file, needle body, needle shield cap, its characterized in that: a positioning hole and a mounting hole are formed in the outer needle base, a positioning switch is arranged in the positioning hole, an inner needle base is arranged in the mounting hole, and the needle body is fixedly connected with the inner needle base; a plurality of elastic inner buckling positioning claws are uniformly arranged on the circumference of the end part of the positioning switch at intervals and form positioning through holes, and a positioning step and a buckle releasing step are respectively arranged at one end of the inner needle base corresponding to the positioning switch; the end part of the inner needle base penetrates through the positioning through hole and is abutted against the elastic inner buckling positioning claw through the positioning step, and the positioning switch is fixedly arranged in the positioning hole.

2. A self-destructing needle hub attachment structure according to claim 1, further comprising: an elastic sealing thin ring is arranged between the inner needle base and the mounting hole.

3. A self-destructing needle hub attachment structure according to claim 2, further comprising: and the end part of the mounting hole and the inner needle base are respectively provided with a matched positioning sealing cone part.

4. A self-destructing needle hub attachment structure according to claim 3, further comprising: the elastic sealing thin ring is arranged at the positioning sealing conical part between the mounting hole and the inner needle seat.

5. A self-destructing needle hub attachment structure according to claim 1, further comprising: the positioning step, the releasing buckle step and the central axis of the positioning switch are not vertical.

6. A self-destructing needle hub attachment structure according to claim 1, further comprising: and a positioning boss for forming positioning and clamping fixation on the positioning switch is arranged in the positioning hole.

7. A self-destruction puncture-proof injector adopting the self-destruction needle head connecting structure of any one of claims 1 to 6, which comprises a syringe and a push rod, wherein the end part of the syringe is provided with a connecting cone nozzle, and the end part of the push rod is provided with a piston, and is characterized in that: a needle seat positioning column is arranged in the connecting conical nozzle, the outer needle seat is connected with the needle seat positioning column, a return pull rod is arranged at the end part of the push rod, a hanging buckle hole is formed in the end part of the return pull rod, and a hanging buckle boss is arranged in the hanging buckle hole; the pull-back rod can penetrate through the needle seat positioning column to open the elastic inner buckling positioning claw of the outer needle seat positioning switch, and the hanging buckle boss arranged in the hanging buckle hole at the end part of the pull-back rod can form a buckle with the buckle releasing step at the end part of the inner needle seat.

8. The self-destructing anti-piercing syringe as recited in claim 7, further comprising: a thinning cavity is arranged in the piston.