CN213789352U

CN213789352U - Self-destruction syringe

Info

Publication number: CN213789352U
Application number: CN202020606913.9U
Authority: CN
Inventors: 李静; 石明阳
Original assignee: Chengdu Xinjin Shifeng Medical Instrument Co Ltd
Current assignee: Chengdu Xinjin Shifeng Medical Instrument Co Ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2021-07-27
Anticipated expiration: 2030-04-21

Abstract

The utility model relates to the technical field of medical equipment, a medical equipment technical field is provided. The core bar of the self-destruction injector comprises a first push rod, a second push rod, a fracture section and a pressing means which are connected in sequence; one end of the first push rod, which is far away from the second push rod, is connected with a rubber plug of the self-destruction syringe; the second push rod is provided with a backstop clamping piece for self-locking with a sleeve of the self-destruction syringe; the breaking section and the pressing section are connected through a sheet material. The self-destruction syringe has ingenious structural design, can avoid self-destruction before use, and has more stable structure.

Description

Self-destruction syringe

Technical Field

The utility model relates to the technical field of medical equipment, particularly, relate to a self-destruction formula syringe.

Background

The self-destruction syringe is a disposable syringe product which can prevent repeated use after use, and after injection is finished, the push rod cannot be pulled out of the syringe by hand or mechanical force, so that self-locking is achieved, or the sealing performance of the piston is damaged, or the push rod of the syringe can be inferred, and the aim of preventing repeated use is finally fulfilled.

Patent document CN206642175U discloses an improved self-destruction syringe. However, the contact point design of the improved self-destruction syringe is easy to cause the improved self-destruction syringe to be easily broken during and before use, and the structure is unstable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a self-destruction syringe, this self-destruction syringe structural design is ingenious, can avoid going on self-destruction before using, and the structure is more stable.

The embodiment of the utility model is realized like this:

a self-destruction injector, its core bar includes the first push rod, the second push rod, the fracture section and the pressing means which are connected in turn; one end of the first push rod, which is far away from the second push rod, is connected with a rubber plug of the self-destruction syringe; the second push rod is provided with a backstop clamping piece for self-locking with a sleeve of the self-destruction syringe; the breaking section and the pressing section are connected through a sheet material.

Further, in the preferred embodiment of the present invention, the inner wall of the sleeve, which is away from the needle of the self-destruction syringe, is annularly provided with the self-destruction boss along the circumferential direction thereof, the second push rod is concavely provided with the annular groove along the circumferential direction thereof, the retaining card is disposed in the annular groove, and the retaining card can form a butt with the self-destruction boss.

Further, in a preferred embodiment of the present invention, the direction from the first push rod to the pressing means is set to a preset direction; the self-destruction boss comprises an abutting section and an avoiding section which are continuously arranged along the preset direction; along the preset direction, the inner diameter of the cross section of the abutting section is gradually reduced, and the inner diameter of the cross section of the avoiding section is gradually increased; the backstop card can be drawn in the avoiding section and forms butt joint with the butt joint section; the maximum inner diameter of the abutting section is smaller than or equal to the inner diameter of the inner cavity of the sleeve.

Furthermore, in a preferred embodiment of the present invention, the backstop card comprises a plurality of resilient pieces; the elastic pieces are uniformly arranged in the circumferential direction by taking the shaft axis of the sleeve as the shaft axis of the elastic pieces.

Further, in a preferred embodiment of the present invention, the ring groove has an annular bottom wall; one end of the elastic sheet is connected with the bottom wall, and the other end of the elastic sheet extends towards the inner wall of the sleeve and can be abutted against the abutting section.

Further, in the preferred embodiment of the present invention, the diameter of the inner cavity of the sleeve is smaller than the maximum distance between the two oppositely disposed elastic pieces.

Further, in a preferred embodiment of the present invention, the breaking section includes a connecting member, a first connecting section and a second connecting section which are connected in sequence along the predetermined direction; one end of the connecting piece, which is far away from the second connecting section, is connected with the second push rod; along the preset direction, the cross section of the first connecting section is circular, and the cross section of the second connecting section is circular with the diameter gradually reduced; the maximum diameter of the second connecting section is equal to the diameter of the first connecting section; the diameter of the first connecting section is smaller than the minimum inner diameter of the avoiding section.

The utility model provides a pair of self-destruction syringe's beneficial effect is:

the utility model provides a self-destruction syringe, the fracture section of its core bar passes through the sheet with according to the hand section and connects. The traditional self-destruction injector adopts a contact point design; although the contact point is designed to be broken easily in the self-destruction process, the contact area of the contact point is small, the structure is unstable, and the risk of easy breakage exists under small acting force when and before the injector is used, so that the injector can not be used easily; the improved structure that the 'point' contacts the 'surface' contact can well avoid the syringe from being broken before use or in the use process, the structure is more stable, the syringe can be used smoothly, and the syringe can be broken only by providing a slightly larger breaking force during breaking.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural view of a self-destruction syringe in a first use state according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a self-destruct syringe in a second use state according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a core rod according to an embodiment of the present invention.

Icon: 10-self-destruction syringe, 100-core rod, 200-sleeve, 300-rubber plug, 110-first push rod, 120-second push rod, 130-breaking section, 140-pressing means, 150-backstop card, 160-ring groove, 170-sheet, 210-self-destruction boss, 211-abutting section, 212-avoiding section, 151-spring plate, 131-connecting piece, 132-first connecting section and 133-second connecting section.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

Examples

The invention is further described below with reference to the accompanying figures 1-3:

the present invention provides a self-destruction syringe 10, please refer to fig. 1-3, the self-destruction syringe 10 includes a core rod 100 and a sleeve 200 covering the core rod 100. It should be noted that the parts of the auto-disable syringe 10 not mentioned in the present embodiment, such as the needle tube, refer to the structure in the prior art, for example, the structure of the needle disclosed in the patent document with the publication number CN 206642175U.

The core bar 100 includes a first push rod 110, a second push rod 120, a breaking section 130 and a pressing section 140 connected in sequence. One end of the first push rod 110 far away from the second push rod 120 is connected with the rubber plug 300 of the self-destruction syringe 10, the second push rod 120 is provided with a retaining clip 150 for self-locking with the sleeve 200 of the self-destruction syringe 10, specifically, in the present embodiment, the inner wall of the sleeve 200 far away from the needle of the self-destruction syringe is annularly provided with a self-destruction boss 210 along the self circumference, the second push rod 120 is concavely provided with a ring groove 160 along the self circumference, the retaining clip 150 is arranged in the ring groove 160, and the retaining clip 150 can form an abutting joint with the self-destruction boss 210.

Specifically, in the present embodiment, the direction toward the pressing means 140 by the first push rod 110 is set as the preset direction. The structure of the self-destruction boss 210 is not particularly limited, and further, the self-destruction boss 210 includes an abutting section 211 and an avoiding section 212 which are continuously arranged along a preset direction. In the preset direction, the inner diameter of the cross section of the abutting section 211 is gradually reduced, and the inner diameter of the cross section of the avoiding section 212 is gradually increased. To ensure that sufficient pull-out space is provided for the break-away section 130 and the push section 140. The backstop card 150 can be drawn in the escape segment 212 and brought into abutment with the abutment segment 211, the maximum inner diameter of the abutment segment 211 being less than or equal to the inner diameter of the inner cavity of the sleeve 200.

In this embodiment, the retaining card 150 includes a plurality of elastic pieces 151, and the elastic pieces 151 are circumferentially and uniformly arranged with the axis of the sleeve 200 as the axis thereof. To ensure a balanced force of sleeve 200 against core rod 100 and to ensure a balanced advancement and retraction of core rod 100. Further, in the present embodiment, the ring groove 160 has an annular bottom wall (not labeled), and one end of the elastic sheet 151 is connected to the bottom wall, and the other end extends toward the inner wall of the sleeve 200 and can be abutted to the abutting section 211. The diameter of the inner cavity of the sleeve 200 is smaller than the maximum distance between the two oppositely arranged spring pieces 151. The above design enables the spring 151 to be abutted at the abutting section 211 when the core rod 100 is pulled out from the sleeve 200 after the injection is completed, so that the spring cannot be pulled out, and the self-locking is realized.

In the present embodiment, the breaking section 130 includes a connecting member 131, a first connecting section 132 and a second connecting section 133 which are connected in sequence along the preset direction. The end of the connecting member 131 away from the second connecting segment 133 is connected to the second push rod 120. In the predetermined direction, the cross section of the first connection section 132 is circular, and the cross section of the second connection section 133 is circular with a diameter gradually decreasing. The maximum diameter of the second connecting section 133 is equal to the diameter of the first connecting section 132. The diameter of the first connecting section 132 is smaller than the minimum inner diameter of the bypass section 212. The structural design of the fracture section 130 facilitates better movement within the avoidance section 212.

In this embodiment, the breaking section 130 and the pressing section 140 are connected by a sheet 170. The syringe can be well prevented from being accidentally broken before or in the using process, and the structure is more stable.

The self-destruct syringe 10 provided in this embodiment is used as follows: when injection is needed, the core rod 100 is pushed into the sleeve 200 until the rubber plug 300 is abutted against the sleeve 200, and injection is started; after the injection is finished, the core rod 100 is pulled out, and in the process of pulling out the core rod 100, the backstop card 150 and the abutting section 211 form abutting to finish self-locking, so that the core rod 100 cannot be pulled out from the sleeve 200 continuously, and at the moment, the pressing means 140 is pulled, so that the pressing means 140 and the breaking section 130 are broken off to realize self-destruction.

To sum up, the self-destruction syringe 10 provided by the present embodiment of the present invention has the advantages of ingenious structural design, capability of avoiding self-destruction before use, and more stable structure.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-destruction syringe is characterized in that: the core bar comprises a first push rod, a second push rod, a fracture section and a pressing means which are connected in sequence; one end of the first push rod, which is far away from the second push rod, is connected with a rubber plug of the self-destruction syringe; the second push rod is provided with a backstop clamping piece used for self-locking with a sleeve of the self-destruction syringe; the breaking section is connected with the pressing section through a sheet;

the inner wall of the sleeve, which is far away from the needle head of the self-destruction syringe, is annularly provided with a self-destruction boss along the self circumferential direction, the second push rod is concavely provided with an annular groove along the self circumferential direction, and the backstop clamping piece is arranged in the annular groove and can be abutted against the self-destruction boss;

the direction from the first push rod to the pressing means is set to be a preset direction; the self-destruction boss comprises an abutting section and an avoiding section which are continuously arranged along the preset direction; along the preset direction, the inner diameter of the cross section of the abutting section is gradually reduced, and the inner diameter of the cross section of the avoiding section is gradually increased; the backstop card can be drawn in the avoiding section and is abutted against the abutting section; the maximum inner diameter of the abutting section is smaller than or equal to the inner diameter of the inner cavity of the sleeve.

2. The self-destructing syringe according to claim 1, wherein: the backstop card comprises a plurality of elastic sheets; the elastic pieces are uniformly arranged in the circumferential direction by taking the shaft axis of the sleeve as the shaft axis of the elastic pieces.

3. The self-destructing syringe according to claim 2, wherein: the ring groove has an annular bottom wall; one end of the elastic sheet is connected with the bottom wall, and the other end of the elastic sheet extends towards the inner wall of the sleeve and can be abutted against the abutting section.

4. The self-destructing syringe according to claim 3, characterized in that: the diameter of the inner cavity of the sleeve is smaller than the maximum distance between the two oppositely arranged elastic sheets.