CN216496856U

CN216496856U - Disposable syringe

Info

Publication number: CN216496856U
Application number: CN202122284678.5U
Authority: CN
Inventors: 刘恒全; 李峻峰; 张佩聪; 陆盘中
Original assignee: Chengdu Univeristy of Technology
Current assignee: Chengdu Univeristy of Technology
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-05-13
Anticipated expiration: 2031-09-22

Abstract

The utility model discloses a disposable syringe, which relates to the field of medical treatment and comprises a syringe, a push rod, a needle head, a sealing ring, an extrusion push head, a limiting barrel and a limiting ring for limiting the push rod to move towards the direction of the needle head, wherein the side surface of the sealing ring close to the extrusion push head is concave inwards to form a mounting groove, the limiting ring is embedded in the mounting groove, and the outer diameter of the limiting ring is greater than the inner diameter of a first end of the limiting barrel; the limiting barrel is arranged on the inner side wall of the injection barrel, and after injection is finished, the push rod is limited to move in the direction away from the needle head, so that the condition that bad persons use the injector for multiple times is effectively prevented, and the safety of the injector in each use is ensured; simultaneously, the side face of the sealing ring close to the extrusion pushing head is embedded with the limiting ring, when injection is completed, the limiting ring and the sealing ring are in close contact with the first end of the limiting cylinder, so that all medicines in the injection cylinder can be injected, and the waste of the medicines in the injection cylinder is avoided.

Description

Disposable syringe

Technical Field

The utility model relates to the field of medical treatment, in particular to a disposable syringe.

Background

Disposable injectors are widely used in a variety of medical settings, and the World Health Organization (WHO) promulgates new guidelines for safe injection that effectively reduce the risk of unsafe events by reducing the number of unnecessary injections with injection devices having a safe design. Unsafe injections can result in the spread of hepatitis b, hepatitis c, aids, and other diseases, exposing medical personnel performing the injection operations to risks, and the waste after injection can also cause harm to the environment and others.

When an epidemic situation outbreak occurs, the effective vaccination of the whole population becomes the main task of epidemic situation prevention and control. At present, the whole process of vaccination in China is over 10 hundred million people, and the more people are vaccinated, the greater the protective effect of the vaccine is. The disposable syringe is a medical appliance indispensable to vaccination and mainly comprises an injection needle, an outer sleeve, a core rod and a piston, wherein the piston is sleeved at the top end of the core rod and is in interference fit with the inner surface of the outer sleeve.

The requirements of a vaccine inoculation disposable syringe are higher than that of a common disposable syringe, and the safety and the operation convenience of the special injection become important parameters of the syringe. In practical use, because the injection dosage of the vaccine injector is small, the frictional resistance between the piston and the core rod is large structurally, and the sliding property between the piston and the core rod is poor when the matching is influenced. Secondly, when medical personnel are using this syringe to draw the liquid medicine, because the reason of product self can make the piston drop from the core bar occasionally to influence medical personnel's operation, extravagant liquid medicine.

Disclosure of Invention

The present invention is directed to a single-use syringe designed to solve the above problems.

The utility model realizes the purpose through the following technical scheme:

disposable injector, including injection tube, push rod, syringe needle and sealing washer, the first end at the push rod is fixed to the sealing washer, and inside the first end and the sealing washer of push rod all were located injection tube, the first end at injection tube was fixed to the syringe needle, and the injector still includes:

extruding the push head; the first end of the extrusion pushing head is fixedly connected with the first end of the push rod;

a restraining cylinder; the outer side wall of the limiting cylinder is fixedly connected with the inner side wall of the injection cylinder, and the outer diameter of the second end of the extrusion push head, the inner diameter of the first end of the limiting cylinder and the outer diameter of the first end of the extrusion push head are sequentially increased;

the limiting ring is used for limiting the push rod to move towards the needle head direction; the side that the sealing washer is close to the extrusion pushing head is recessed to form the mounting groove, and spacing ring inlays in the mounting groove, and the external diameter of spacing ring is greater than the internal diameter of a restriction section of thick bamboo first end, and when the injection was accomplished, the second end and the syringe needle in close contact with of extrusion pushing head, spacing ring and sealing washer all with the first end in close contact with of a restriction section of thick bamboo, the ascending motion of syringe needle direction is kept away from to a restriction section of thick bamboo restriction push rod orientation.

The utility model has the beneficial effects that: the limiting barrel is arranged on the inner side wall of the injection barrel, and after injection is finished, the push rod is limited to move in the direction away from the needle head, so that the condition that bad personnel use the injector for multiple times is effectively prevented, and the safety of the injector in each use is ensured; simultaneously, the side face of the sealing ring close to the extrusion pushing head is embedded with the limiting ring, when injection is completed, the limiting ring and the sealing ring are both in close contact with the first end of the limiting cylinder, so that all medicines in the injection cylinder can be injected, and the waste of the medicines in the injection cylinder is avoided.

Drawings

FIG. 1 is a schematic view of the construction of the single use syringe of the present invention;

FIG. 2 is a schematic view showing the internal structure of the single-use syringe of the present invention;

FIG. 3 is a schematic view of the structure of the extrusion pusher of the single use syringe of the present invention;

FIG. 4 is a schematic cross-sectional view of the restraining cartridge of the single use syringe of the present invention;

FIG. 5 is a schematic structural view of a mounting base in the single use syringe of the present invention;

wherein corresponding reference numerals are:

the injection device comprises a syringe 1, a push rod 2, a needle 3, a sealing ring 4, an extrusion push head 5, a mounting seat 6, a groove 7, a convex surface 8, a connecting rod 9, a limiting ring 10 and a limiting cylinder 11.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention 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 figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within 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.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following detailed description of embodiments of the utility model refers to the accompanying drawings.

As shown in fig. 1, 2, 3, 4, and 5, the single-use syringe includes a syringe barrel 1, a push rod 2, a needle 3, and a sealing ring 4, the sealing ring 4 is fixed at a first end of the push rod 2, the first end of the push rod 2 and the sealing ring 4 are both located inside the syringe barrel 1, the needle 3 is fixed at the first end of the syringe barrel 1, and the syringe further includes:

extruding the push head 5; the first end of the extrusion push head 5 is fixedly connected with the first end of the push rod 2;

a restraining cylinder 11; the outer side wall of the limiting cylinder 11 is fixedly connected with the inner side wall of the injection cylinder 1, and the outer diameter of the second end of the extrusion push head 5, the inner diameter of the first end of the limiting cylinder 11 and the outer diameter of the first end of the extrusion push head 5 are sequentially increased;

a limiting ring 10 for limiting the push rod 2 to move towards the needle 3; sealing washer 4 is close to the side indent formation mounting groove of extrusion pushing head 5, spacing ring 10 is embedded in the mounting groove, the external diameter of spacing ring 10 is greater than the internal diameter of the first end of a restriction section of thick bamboo 11, when the injection is accomplished, the second end and the 3 in close contact with of syringe needle of extrusion pushing head 5, spacing ring 10 and sealing washer 4 all with the first end in close contact with of a restriction section of thick bamboo 11, 3 ascending movements of syringe needle are kept away from to restriction section of thick bamboo 11 restriction push rod 2 orientation, spacing design through spacing ring 10, arrange in between extrusion pushing head 5 and the sealing washer 4, can be spacing in propulsion process, prevent push rod 2 and the excessive forward motion of extrusion pushing head 5 under the thrust action, improve the operational safety simultaneously at abundant injection medicine.

As shown in fig. 2 and 3, the extrusion pushing head 5 is a circular truncated cone structure, and a second end of the extrusion pushing head 5 is fixedly connected with a first end of the push rod 2 through a connecting rod 9.

As shown in fig. 2, fig. 5, the syringe still includes mount pad 6, be provided with the mounting hole on the mount pad 6, the embedded fixing in the mounting hole of first end of syringe needle 3, mount pad 6 is close to the terminal surface indent formation recess 7 of push rod 2, syringe needle 3 and recess 7 intercommunication, extrusion pushing head 5 is close to the terminal surface protrusion formation convex surface 8 of syringe needle 3, convex surface 8 matches with recess 7, convex surface 8 is spherical structure, spherical structure is not more than half spheroidal sphere, the design of 5 convex surfaces 8 of extrusion pushing head and 6 recess 7 of mount pad, can effectively reduce the condition that the medicine stayed in injection tube 1 to the bacterin injection dose in particular, avoid the waste of the interior medicine of injection tube 1.

The working principle of the disposable syringe of the utility model is as follows:

during injection, the push rod 2 is pushed to drive the extrusion pushing head 5 to move towards the direction of the needle head 3, along with the movement of the extrusion pushing head 5, the second end of the extrusion pushing head 5 starts to be in contact with the first end of the limiting cylinder 11, the side wall of the extrusion pushing head 5 is in extrusion contact with the inner side wall of the first end of the limiting cylinder 11 until the convex surface 8 of the extrusion pushing head 5 is in close contact with the groove 7 of the mounting seat 6, so that all liquid medicine in the injection cylinder 1 can be discharged out of the injection cylinder 1 to the maximum extent, at the moment, the extrusion pushing head 5 completely enters the limiting cylinder 11, the limiting ring 10 is in close contact with the sealing ring 4 and the first end of the limiting cylinder 11, the movement of the push rod 2 towards the direction far away from the needle head 3 can be limited, the condition that bad personnel use the injector for multiple times is effectively prevented, the safety of the injector in each use is ensured, meanwhile, during the pushing of the push rod 2, the design is that the limiting ring 10 is embedded in the position of the sealing ring 4 close to the side surface of the extrusion pushing head 5, can be spacing in propulsion process, prevent that push rod 2 and extrusion pushing head 5 excessively move forward under the thrust effect, improve the operational safety simultaneously fully injecting the medicine, inject simultaneously and accomplish the back, do not have the medicine between sealing washer 4 and the restriction section of thick bamboo 11 and remain.

The technical solution of the present invention is not limited to the limitations of the above specific embodiments, and all technical modifications made according to the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. Disposable injector, including injection tube, push rod, syringe needle and sealing washer, the first end at the push rod is fixed to the sealing washer, and inside the first end and the sealing washer of push rod all were located injection tube, the first end at injection tube was fixed to the syringe needle, its characterized in that, the injector still includes:

2. The single use syringe of claim 1 wherein the extrusion ram is a circular truncated cone and the second end of the extrusion ram is fixedly connected to the first end of the ram by a connecting rod.

3. The single use syringe of claim 2, further comprising a mounting base, wherein the mounting base has a mounting hole, the first end of the needle is embedded and fixed in the mounting hole, the end surface of the mounting base near the push rod is concave to form a groove, the needle is communicated with the groove, the end surface of the extrusion push head near the needle is convex to form a convex surface, and the convex surface is matched with the groove.

4. The single use syringe of claim 3 wherein the convex surface is a spherical structure, the spherical structure being no more than one-half of a sphere.