CN217745244U - Syringe with retrieve syringe needle function - Google Patents

Abstract

The application provides an injector with a needle recovery function, which comprises a needle cylinder, a piston component and a needle; the lower end of the needle cylinder forms a jack; a needle can be slidably inserted into the jack; the needle head and the jack are kept liquid-tight; a stop is formed at the upper end of the needle head; the baffle is formed into a plate shape, and the peripheral edge of the baffle is formed into a curved surface shape which is arched outwards; the diameter of the stop head is larger than that of the jack; the piston member comprises a piston rod and a piston head; the piston head comprises an inner head made of hard plastic and an outer head wrapped on the periphery of the inner head; the outer head is made of silica gel and is used for forming sealing between the inner wall of the needle cylinder and the outer wall of the piston head; the lower end of the piston rod is connected to the inner head; a concave part for clamping the retaining head is formed on the lower surface of the inner head; a guide slope is formed on a lower edge of the recess.

Description

Syringe with retrieve syringe needle function

Technical Field

The present application relates to medical devices, and more particularly, to an injector with a needle retraction function.

Background

The needle of the syringe is sharp, and after the use is finished, the needle must be correspondingly removed so as to avoid needle stick injury. The removal of the needle needs to be carried out in a special removal hole of the sharps barrel, which requires the sharps barrel to be around at any time, increasing the preparation work. In addition, there are limited devices or equipment that can be carried in the case of night warfare.

SUMMERY OF THE UTILITY MODEL

In view of the above problem, the present application aims to provide a syringe with a needle recovery function, which can recover a needle after use, and can avoid the needle from being exposed without disassembling the needle, thereby avoiding the occurrence of needle-stick injuries.

The application relates to an injector with a needle recovery function, which comprises a needle cylinder, a piston component and a needle;

the lower end of the needle cylinder forms a jack; a needle can be slidably inserted into the jack; the needle head and the jack are kept liquid-tight;

a stop is formed at the upper end of the needle head; the baffle is formed into a plate shape, and the peripheral edge of the baffle is formed into a curved surface shape which is arched outwards; the diameter of the stop head is larger than that of the jack;

the piston member includes a piston rod and a piston head; the piston head comprises an inner head made of hard plastic and an outer head wrapped on the periphery of the inner head; the outer head is made of silica gel and is used for forming sealing between the inner wall of the needle cylinder and the outer wall of the piston head; the lower end of the piston rod is connected to the inner head; a concave part for clamping the retaining head is formed on the lower surface of the inner head; a guide inclined plane is formed on the lower edge of the depressed part;

when the liquid medicine in the needle cylinder is about to be completely pushed out, the concave part of the inner head is buckled on the retaining head, and the retaining head is clamped on the inner head; at this time, the piston rod is withdrawn, and the inner head at the lower end of the piston rod carries the needle head to be recovered into the syringe.

Preferably, the curved surface of the blocking head which is arched outwards is an arc-shaped curved surface.

By engaging the plunger head with the stopper of the needle, the plunger head can engage the stopper after use, thereby allowing the needle to be withdrawn into the barrel upon withdrawal of the plunger rod.

Drawings

FIG. 1 is a schematic view of a syringe with needle retraction of the present application;

FIG. 2 is a schematic view of a plunger head and needle of a syringe of the present application having needle retraction capability;

FIG. 3 is an enlarged partial view of the plunger head and needle combination of a syringe having a needle retraction feature according to the present application;

fig. 4 is a schematic view of a syringe having a needle recovery function according to the present application in which a needle is recovered into a cylinder.

Detailed Description

Hereinafter, a syringe having a needle recovery function according to the present application will be described in detail with reference to the accompanying drawings.

The utility model provides an injection syringe with retrieve needle function, it includes barrel 1, piston member 2, needle 3.

The lower end of the needle cylinder 1 forms an insertion hole 11; the needle 3 is slidably inserted into the insertion hole 11. A fluid-tight seal is maintained between the needle 3 and the receptacle 11.

The upper end of the needle 3 forms a stop 31; the stopper 31 is formed in a plate shape, and the outer peripheral edge thereof is formed in a curved surface shape which is arched outward; the diameter of the stopper 21 is larger than the diameter of the insertion hole 11.

The piston member 2 comprises a piston rod and a piston head; the piston head comprises an inner head 21 made of hard plastics and an outer head 23 wrapping the periphery of the inner head 21; the outer head 23 is made of silica gel and is used for forming sealing between the inner wall of the needle cylinder and the outer wall of the piston head; the lower end of the piston rod is connected to the inner head 21; a concave part 22 for clamping the retaining head 31 is formed on the lower surface of the inner head 21; a guide ramp 24 is formed on the lower edge of the recess 22 to facilitate snap-fitting of the stop into the recess 22. The inner head 21 may be formed with slits to facilitate the opening of the recess 22 for inserting the stopper 31 therein. If the inner head 21 has sufficient elasticity, the slit may not be formed.

The curved surface of the stopper 31 that is arched outward is an arc-shaped curved surface.

The syringe of the present application is particularly suited for use as a prefilled syringe.

When the medical liquid medicine bottle is used, as shown in figure 1, the piston head is continuously pushed downwards, and when the liquid medicine is about to be completely pushed out, the concave part of the inner head is buckled on the retaining head, so that the retaining head is clamped on the inner head; at the moment, the piston rod is withdrawn, and the inner head at the lower end of the piston rod can carry the needle head to be recovered into the needle cylinder together, so that the needle head is prevented from being exposed to the outside to cause puncture.

Claims (2)

1. An injector with a needle recovery function comprises a needle cylinder, a piston component and a needle; the method is characterized in that:

the lower end of the needle cylinder forms a jack; a needle can be slidably inserted into the jack; the needle head and the jack are kept liquid-tight;

a stop is formed at the upper end of the needle head; the baffle is formed into a plate shape, and the peripheral edge of the baffle is formed into a curved surface shape which is arched outwards; the diameter of the stop head is larger than that of the jack;

the piston member includes a piston rod and a piston head; the piston head comprises an inner head made of hard plastic and an outer head wrapped on the periphery of the inner head; the outer head is made of silica gel and is used for forming sealing between the inner wall of the needle cylinder and the outer wall of the piston head; the lower end of the piston rod is connected to the inner head; a concave part for clamping the retaining head is formed on the lower surface of the inner head; a guide inclined plane is formed on the lower edge of the concave part;

when the liquid medicine in the needle cylinder is about to be completely pushed out, the concave part of the inner head is buckled on the retaining head, and the retaining head is clamped on the inner head; at this time, the piston rod is withdrawn, and the inner head at the lower end of the piston rod carries the needle head to be recovered into the syringe.

2. The syringe with needle recovery function of claim 1, wherein:

the curved surface of the retaining head which is arched outwards is an arc-shaped curved surface.

Images