CN213852539U

CN213852539U - Self-destruction disposable syringe

Info

Publication number: CN213852539U
Application number: CN202021961835.0U
Authority: CN
Inventors: 郑晓波
Original assignee: Changzhou Huichun Medical Equipment Co ltd
Current assignee: Changzhou Huichun Medical Equipment Co ltd
Priority date: 2020-09-09
Filing date: 2020-09-09
Publication date: 2021-08-03
Anticipated expiration: 2030-09-09

Abstract

The utility model relates to the technical field of syringes, in particular to a self-destruction disposable syringe, which comprises a syringe needle, a syringe, a piston and a core rod, wherein the front end of the piston extends forwards to form an extension part, the outer peripheral surface of the extension part is provided with an annular bulge, an annular groove matched with the annular bulge is arranged in a tube hole of a connecting tube, the rear end face of the piston is provided with a blind hole, and the outer peripheral surface of the extension part is provided with an annular notch. Preventing from being reused and avoiding cross infection.

Description

Self-destruction disposable syringe

Technical Field

The utility model relates to the technical field of syringes, in particular to a self-destruction disposable syringe.

Background

The injector is a common medical appliance, and consists of a syringe with a small hole at the front end, a piston matched with the syringe and a core rod, and is used for injecting a small amount of liquid or extracting the liquid or the liquid from an inaccessible area by other methods, sucking the liquid or gas from the small hole at the front end of the syringe when the core rod is pulled out, and extruding the liquid or gas when the core rod is pushed in, and is particularly used for intravenous injection of liquid medicine;

at present, when the injector is used, the piston cannot reach the connecting pipe at the front end of the needle cylinder, so that all liquid medicine in the connecting pipe is wasted, the injector is easily recycled after injection, and cross infection is easily caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: in order to solve the problems that in the prior art, the piston of the injector can not reach the connecting pipe at the front end of the syringe, so that all the liquid medicine in the connecting pipe is wasted, the injector is easy to be reused after injection, and cross infection is easy to occur, the self-destruction disposable injector is provided.

The utility model provides a technical scheme that its technical problem adopted is: a self-destruction disposable syringe comprises a needle head, a needle cylinder, a piston and a core rod, wherein the front end of the needle cylinder is provided with a connecting pipe communicated with the inside of the needle cylinder, the needle head is fixed on the connecting pipe and communicated with the inside of the connecting pipe, the piston is slidably mounted in the needle cylinder, the core rod is fixed on the piston, the piston is made of rubber, the front end of the piston extends forwards to form an extending part, the extending part is matched with a pipe hole of the connecting pipe, the peripheral surface of the extending part is provided with an annular bulge, an annular groove matched with the annular bulge is formed in the pipe hole of the connecting pipe, the rear end face of the piston is provided with a blind hole, the blind hole extends into the extending part, an annular gap is formed in the peripheral surface of the extending part, and the annular gap is located between the bottom of the blind hole and the piston.

In the scheme, the extension part is additionally arranged at the front end of the piston, so that when the piston is pushed, the extension part on the piston can extend into the pipe hole of the connecting pipe, so that the liquid medicine in the connecting pipe is injected together, the residue of the liquid medicine in the connecting pipe is reduced, and simultaneously after the extending part reaches the pipe hole, the annular bulge can be clamped in the annular groove to forcibly limit the piston in the connecting pipe to prevent the piston from moving backwards again to extract liquid medicine, the arrangement of the annular gap on the extension part can ensure that the position of the annular gap on the extension part is thinner, after the extending part is clamped in the connecting pipe, the piston is pulled backwards, the extending part can be broken from the annular gap, the blind hole can be communicated with the front side and the rear side of the piston, so that the piston can not extract liquid medicine again, the extending part can be blocked in the connecting pipe, thereby realizing the self-destruction of the injector after one-time injection, preventing the injector from being reused and avoiding cross infection.

Furthermore, the extension part is eccentrically arranged on the piston and is opposite to the pipe hole of the connecting pipe; the extension part and the piston are arranged eccentrically, so that the extension part is easy to tear at one side of the annular notch close to the center of the piston when the piston is pulled backwards under the condition that the extension part is clamped in the connecting pipe.

Further, the front end of the extension part is provided with a conical section, and the small end of the conical section is close to the connecting pipe; the insertion of the extension into the tube hole of the connection tube can be facilitated.

Further, the needle head is fixed on the connecting pipe in a threaded manner.

The utility model has the advantages that: the utility model discloses a self-destruction formula disposable syringe utilizes and adds the extension at the front end of piston, when being impeld, the extension on the piston can stretch into the tube hole of connecting pipe, thereby make the liquid medicine in the connecting pipe be injected together, reduce the residue of liquid medicine in the connecting pipe, simultaneously after the extension reachs the tube hole, annular bulge can block in the annular groove, force to restrict the piston in the connecting pipe, prevent that the piston from moving backward again and extracting the liquid medicine, and the setting of annular breach on the extension can make the annular breach locate comparatively thinly on the extension, after the extension card goes into the connecting pipe, stimulate the piston backward, the extension can break from annular breach, the blind hole can communicate the front and back both sides of piston along with it, cause the piston can't extract the liquid medicine again, the extension also can block up in the connecting pipe, thereby realize the syringe is self-destruction after once injection, preventing from being reused and avoiding cross infection.

Drawings

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

FIG. 1 is a schematic view of the self-disposable single-use syringe of the present invention in an initial state;

FIG. 2 is an enlarged partial schematic view of A of FIG. 1;

FIG. 3 is a schematic view of the self-disposable single-use syringe of the present invention with the extension portion thereof snapped into the connection tube;

fig. 4 is a partially enlarged schematic view of B in fig. 3.

In the figure: 1. the syringe needle comprises a needle head, 2, a syringe barrel, 201, a connecting pipe, 2011, a pipe hole, 2012, an annular groove, 3, a piston, 301, an extension part, 3011, an annular protrusion, 3012, a conical section, 3013, an annular notch, 302, a blind hole, 4 and a core rod.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings, which illustrate the basic structure of the invention only in a schematic way, and thus show only the components that are relevant to the invention, and the directions and references (e.g., upper, lower, left, right, etc.) may be used only to help describe the features in the drawings. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.

Example 1

As shown in fig. 1-4, a self-destruction disposable syringe comprises a needle 1, a syringe 2, a piston 3 and a core rod 4, wherein the front end of the syringe 2 is provided with a connecting tube 201 communicated with the inside of the syringe 2, the needle 1 is fixed on the connecting tube 201 and communicated with the inside of the connecting tube 201, the piston 3 is slidably mounted in the syringe 2, the core rod 4 is fixed on the piston 3, the piston 3 is made of rubber, the front end of the piston 3 extends forward to form an extension 301, the extension 301 is matched with a tube hole 2011 of the connecting tube 201, the outer circumferential surface of the extension 301 is provided with an annular protrusion 3011, a ring-shaped groove 2012 matched with the annular protrusion 3011 is formed in a tube hole 2011 of the connecting tube 201, the rear end face of the piston 3 is provided with a blind hole 302, the blind hole 302 extends into the extension 301, the outer circumferential surface of the extension 301 is provided with an annular notch 3013, the annular gap 3013 is located between the bottom of the blind hole 302 and the piston 3.

The extension part 301 is eccentrically arranged on the piston 3 and is opposite to the pipe hole 2011 of the connecting pipe 201; the extension 301 and the piston 3 are eccentrically arranged, so that when the piston 3 is pulled backwards with the extension 301 being snapped into the connecting tube 201, the extension 301 is easily torn at a side of the annular notch 3013 close to the center of the piston 3.

The front end of the extension part 301 is provided with a conical section 3012, and the small end of the conical section 3012 is close to the connecting pipe 201; insertion of the extension 301 into the tube hole 2011 of the connection tube 201 may be facilitated.

The needle 1 is screwed on the connecting pipe 201.

In the initial state of the injector in this embodiment, the extension part 301 of the piston 3 is located outside the connecting pipe 201, and after a certain amount of liquid medicine is extracted, the piston 3 is pushed forward to discharge the gas in the needle cylinder 2, and then injection can be performed;

the extension part 301 is additionally arranged at the front end of the piston 3, so that when the piston 3 is pushed, the extension part 301 on the piston 3 can extend into a pipe hole 2011 of a connecting pipe 201, so that liquid medicine in the connecting pipe 201 is injected together, the residue of the liquid medicine in the connecting pipe 201 is reduced, meanwhile, after the extension part 301 reaches the pipe hole 2011, the annular protrusion 3011 can be clamped in the annular groove 2012, the piston 3 is forcibly limited in the connecting pipe 201, the piston 3 is prevented from moving backwards again to extract the liquid medicine, the annular notch 3013 on the extension part 301 enables the annular notch 3013 on the extension part 301 to be thinner, after the extension part 301 is clamped in the connecting pipe 201, the piston 3 is pulled backwards, the extension part 301 can be broken from the annular notch 3013, the blind hole 302 can be communicated with the front side and the rear side of the piston 3, so that the liquid medicine cannot be extracted again by the piston 3, the extension part 301 can also be blocked in the connecting pipe 201, and the self-destruction of the injector after one-time injection is realized, preventing from being reused and avoiding cross infection.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a disposable syringe of self-destruction formula, includes syringe needle (1), cylinder (2), piston (3) and core bar (4), syringe needle (2) front end has rather than inside intercommunication connecting pipe (201), syringe needle (1) is fixed on connecting pipe (201) to communicate with the inside of connecting pipe (201), piston (3) slidable mounting is in cylinder (2), core bar (4) are fixed on piston (3), the material of piston (3) is rubber, its characterized in that: the front end of piston (3) extends forward and has extension (301), tube hole (2011) phase-match of extension (301) and connecting pipe (201), the outer peripheral face of extension (301) has annular protrusion (3011), have in tube hole (2011) of connecting pipe (201) and annular protrusion (3011) assorted annular groove (2012), blind hole (302) have been seted up to the rear end terminal surface of piston (3), blind hole (302) extend to in extension (301), annular notch (3013) have been seted up on the outer peripheral face of extension (301), annular notch (3013) are located between the hole bottom of blind hole (302) and piston (3).

2. The self-destructing single use syringe according to claim 1, wherein: the extension part (301) is eccentrically arranged on the piston (3) and is opposite to the pipe hole (2011) of the connecting pipe (201).

3. The self-destructing single use syringe according to claim 1, wherein: the front end of the extension part (301) is provided with a conical section (3012), and the small end of the conical section (3012) is close to the connecting pipe (201).

4. The self-destructing single use syringe according to claim 1, wherein: the needle head (1) is fixed on the connecting pipe (201) through threads.