CN219208481U

CN219208481U - Rubber plug for syringe

Info

Publication number: CN219208481U
Application number: CN202222738108.3U
Authority: CN
Inventors: 吴红清
Original assignee: Jiangyin Homen Rubber Plastic Product Co ltd
Current assignee: Jiangyin Homen Rubber Plastic Product Co ltd
Priority date: 2022-10-18
Filing date: 2022-10-18
Publication date: 2023-06-20
Anticipated expiration: 2032-10-18

Abstract

The utility model discloses a rubber plug for an injector, which comprises a rubber plug main body, wherein the rubber plug main body is a concave surface which is concave downwards. When the rubber plug is applied to a syringe for injecting paste, and the push rod is pushed to extrude the paste, the front end of the push rod presses the front end face of the rubber plug, so that the concave surface of the front end face of the rubber plug main body is reduced in downward concave extent, the push rod is continuously pushed, and the paste is extruded. After the pushing of the push rod is stopped, the front end face of the rubber plug restores to the original concave face due to the action of the restoring force of the rubber plug, so that the paste in the needle cylinder is driven to move inwards, the paste in the small hole at the front end of the needle cylinder is sucked into the needle cylinder, the outflow of the paste is reduced, and the table top or a container for storing the injector is prevented from being polluted.

Description

Rubber plug for syringe

Technical Field

The utility model relates to the field of rubber plugs, in particular to a rubber plug for an injector.

Background

Syringes are a common medical device. As early as the 15 th century, italian katidier proposed the principle of a syringe, mainly to withdraw or inject gas or liquid through a needle. The injector consists of a needle cylinder with a small hole at the front end and a matched piston core rod, and is used for injecting a small amount of liquid or the liquid into areas inaccessible to other methods or extracting the liquid or the gas from the places, wherein the liquid or the gas is sucked from the small hole at the front end of the needle cylinder when the core rod is pulled out, and the liquid or the gas is extruded when the core rod is pushed in.

The syringe can also be used in other fields, such as medical equipment, containers, daily necessities and the like, and the content of the syringe can be gas, liquid or paste with high fluidity and the like. The common injector consists of a needle cylinder and a push rod, wherein the front end of the push rod is usually connected with a rubber plug, so that the content in the injector can be better extruded and cannot flow out along the needle cylinder. However, the rubber stopper of the conventional syringe includes a cylindrical rubber stopper body having a front end surface of a horizontal plane or a tapered surface protruding upward, and when a paste such as cockroach, mouse, or eye drops is injected using the conventional syringe, a certain amount of the contents is extruded, and the remaining paste in the syringe is discharged from a small hole at the front end of the syringe due to inertia, thereby contaminating a table surface or a container in which the syringe is stored.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide a rubber stopper for a syringe, so as to solve the problem that the residual paste naturally flows out when the rubber stopper for the syringe is used for injecting the paste, thereby reducing the pollution of a table top or a container for storing the syringe.

In order to achieve the above object, the present utility model provides a rubber stopper for an injector, comprising a rubber stopper body, wherein the front end surface of the rubber stopper body is a concave surface recessed downward.

In order to solve the problem that the paste in the syringe is easy to naturally flow out under the action of inertia after being extruded, the utility model provides the technical scheme that the front end surface of the rubber plug main body is provided with a concave surface which is concave downwards. When the rubber plug is applied to a syringe for injecting paste, and the push rod is pushed to extrude the paste, the front end of the push rod presses the front end face of the rubber plug, so that the concave surface of the front end face of the rubber plug is reduced in downward concave extent, the push rod is continuously pushed, and the paste is extruded. After the pushing of the push rod is stopped, the front end face of the rubber plug restores to the original concave face due to the action of the restoring force of the rubber plug, so that the paste in the needle cylinder is driven to move inwards, the paste in the small hole at the front end of the needle cylinder is sucked into the needle cylinder, the outflow of the paste is reduced, and the table top or a container for storing the injector is prevented from being polluted.

The further preferable technical scheme is that the front end face of the rubber plug main body is connected with a tail plug, and the shape of the tail plug comprises a cylinder shape or a truncated cone shape. In order to be matched with various syringes in the market, the rubber plug can be of various shapes, including a through hole type rubber plug, a common columnar rubber plug or a columnar rubber plug with a tail plug, preferably, the rubber plug provided by the utility model is a rubber plug with a tail plug, and the shape of the tail plug comprises a columnar shape, a round table shape or other shapes which can be matched with the syringes for use. When the injector is used, if less liquid or paste is in the injector, when the push rod of the injector is pushed, the tail plug can enter the small hole at the front end of the injector needle cylinder, and the liquid or paste in the small hole can be completely extruded by continuously pushing the push rod, so that the liquid or paste is prevented from remaining.

The further preferable technical scheme is that the lower end face of the rubber plug main body is provided with a through hole, an accommodating cavity matched with the ball head of the syringe is arranged in the rubber plug main body, and the through hole is communicated with the accommodating cavity. The through hole is used for matching with the push rod of the injector, when the injector is used, the ball head on the push rod of the injector passes through the through hole to enter the accommodating cavity, the ball head on the push rod is clamped in the accommodating cavity, and the push rod is prevented from being separated from the rubber plug when the push rod is pushed.

Further preferable technical scheme is that the inner diameter of the through hole is smaller than the inner diameter of the accommodating cavity. In general, in order to enable the injector push rod to be tightly matched with the rubber plug, a groove is formed in the rear end of the ball head at the front end of the push rod, and after the ball head enters the accommodating cavity, the through hole is clamped in the groove at the front end of the push rod. The inner diameter of the through hole is further reduced, so that the rubber plug can be tightly wrapped on the ball head at the front end of the push rod, and the push rod and the rubber plug can be further prevented from being separated.

Further preferable technical scheme is that the included angle between the front end face of the rubber plug main body and the horizontal plane is 1-15 degrees.

Further preferable technical scheme is that the included angle between the front end face of the rubber plug main body and the horizontal plane is 1.5-8 degrees.

The degree to which the liquid in the small hole at the front end of the syringe is sucked back into the syringe depends on the degree to which the concave surface at the front end of the rubber stopper main body is recessed downwards, namely, depends on the included angle between the front end surface of the rubber stopper main body and the horizontal plane. The angle between the front end surface of the rubber stopper main body and the horizontal plane is preferably 1 to 15 °, more preferably 1.5 to 8 °, and particularly may be set to 1.5 ° or 1.7 ° or 2 ° or 4 ° or 5 ° or 6.5 ° or 8 °, depending on the viscosity of the content of the syringe.

Further preferable technical scheme is that the shape of the rubber plug main body comprises a cylinder or a prismatic shape, and a plurality of annular ribs are arranged on the cylinder of the rubber plug main body.

The utility model has the advantages and beneficial effects that:

1. when the rubber plug is applied to a syringe for injecting paste, and the push rod is pushed to extrude the paste, the front end of the push rod presses the front end face of the rubber plug, so that the concave surface of the front end face of the rubber plug is reduced in downward concave extent, the push rod is continuously pushed, and the paste is extruded. After the pushing of the push rod is stopped, the front end face of the rubber plug restores to the original concave face due to the action of the restoring force of the rubber plug, so that the paste in the needle cylinder is driven to move inwards, the paste in the small hole at the front end of the needle cylinder is sucked into the needle cylinder, the outflow of the paste is reduced, and the table top or a container for storing the injector is prevented from being polluted.

2. When the injector is used, if less liquid or paste is in the injector, when the push rod of the injector is pushed, the tail plug can enter the small hole at the front end of the injector needle cylinder, and the liquid or paste in the small hole can be completely extruded by continuously pushing the push rod, so that the liquid or paste is prevented from remaining. When the tail plug is arranged into a truncated cone shape and the front end face of the rubber plug returns to the original concave face, part of paste can flow into the needle cylinder along the gap between the front end of the tail plug and the inner wall of the needle cylinder, so that the outflow of the paste can be further reduced.

Drawings

FIG. 1 is a schematic view showing the structure of a rubber stopper for a syringe according to the embodiment.

In the figure: 1. a rubber stopper body; 2. a tail plug; 3. a through hole; 4. a receiving chamber; 5. annular rib.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

Example 1

As shown in fig. 1, a rubber plug for an injector comprises a cylindrical rubber plug main body 1, wherein a tail plug 2 is connected to the front end surface of the rubber plug main body 1, the tail plug 2 is in a round table shape, the front end surface of the rubber plug main body 1 is a concave surface recessed downwards, and the included angle between the front end surface of the rubber plug main body 1 and the horizontal plane is 2 degrees. The lower terminal surface of rubber buffer main part 1 is provided with through-hole 3, inside be provided with syringe bulb assorted hold chamber 4, through-hole 3 is linked together with holding chamber 4, the internal diameter of through-hole 3 is less than the internal diameter that holds chamber 4. The column body of the rubber plug main body 1 is provided with 4 annular convex edges 5.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims

1. The rubber plug for the injector is characterized by comprising a rubber plug main body, wherein the front end surface of the rubber plug main body is a concave surface which is concave backwards.

2. The rubber stopper for a syringe according to claim 1, wherein a tail stopper is attached to a front end surface of the rubber stopper main body, and the shape of the tail stopper includes a cylindrical shape or a truncated cone shape.

3. The rubber stopper for a syringe according to claim 2, wherein a through hole is provided at a lower end surface of the rubber stopper body, a receiving cavity matched with a syringe ball is provided inside the rubber stopper body, and the through hole is communicated with the receiving cavity.

4. A rubber stopper for a syringe according to claim 3 wherein the through hole has an inner diameter smaller than the inner diameter of the receiving chamber.

5. The rubber stopper for syringe according to claim 4, wherein the angle between the front end surface of the rubber stopper body and the plane formed by the edge of the rubber stopper body is 1 to 15 °.

6. The rubber stopper for syringe according to claim 4, wherein the angle between the front end surface of the rubber stopper main body and the plane formed by the edge of the rubber stopper main body is 1.5 to 8 °.

7. A rubber stopper for a syringe according to claim 5 or 6, wherein the shape of the rubber stopper body comprises a cylindrical shape or a prismatic shape, and a plurality of annular ribs are provided on the cylinder of the rubber stopper body.