JPH11206882A - Injection syringe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection syringe that keeps safety and sanitariness of an injection needle and also eases frightening mind occurred by seeing the injection needle. SOLUTION: This is an injection syringe that injects injection liquid S, which is stowed in a cylinder 2, through an injection needle 4 by thrusting a piston 3, which is inserted reciprocally movably in the cylinder 2. When a sheath 5, which is fitted go-and-back movably to the outer periphery of the cylinder 2 and covering the injection needle 4, is pressed by a spring 6 to a place to be given injection, the sheath 5 retreats and exposes the injection needle 4. After the needle is inserted into the place to be injected, the injection liquid S is injected through the injection needle 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe for medical use or the like.

[0002]

2. Description of the Related Art In a conventionally used syringe, a medicinal solution is injected into an injection site through an injection needle by pushing a piston inserted into a cylinder with human power.

[0003]

However, if the injection needle is exposed when not in use, there are the following problems.
For example: (1) There is a case where a syringe needle is accidentally stabbed.

(2) The injection needle touches an object other than the injection site, which is unsanitary. (3) When used for self-injection of insulin or the like, a fear of piercing the injection needle is given.

An object of the present invention is to provide a syringe which can solve the above-mentioned problems.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a syringe for storing a drug solution in a cylinder and injecting the drug solution via a syringe needle by pushing a piston reciprocally inserted into the cylinder into the cylinder. The sheath, which is fitted into the outer periphery of the cylinder so as to be able to advance and retreat and is held at a position covering the injection needle by the urging means, is pressed against the injection site, whereby the sheath retreats against the urging force of the spring,
After the needle exposed from the sheath is inserted into the injection site, the piston is pushed into the cylinder, whereby the drug solution is injected through the injection needle.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

A syringe 1 shown in FIG. 1 includes a cylinder 2 and a piston 3 inserted into the cylinder 2 so as to be able to reciprocate. An injection needle 4 for injecting the drug solution S in the cylinder 2 into a human body or the like is provided at the tip of the cylinder 2. A sheath 5 is provided on the outer periphery of the cylinder 2 so as to be able to advance and retreat from a position at least covering the injection needle 4 to a position where the injection needle 4 is exposed. A projection 7 and a projection 8 are provided on the cylinder 2 and the sheath 5, respectively. A spring 6 is provided between the projection 7 and the projection 8. When the sheath 5 retreats from a position covering the injection needle 4 (initial position) to a position where the injection needle 4 is exposed, an urging force for returning the sheath 5 to the initial position is applied. The sheath 5 has a transparent part and an opaque part. When it is necessary to check the injection position, the injection needle 4 can be seen from the transparent part and the injection needle 4 can be hidden by the opaque part. Thus, the fear of seeing the injection needle 4 can be reduced. The injection needle 4 may always be covered by making the whole opaque.

Next, a method of using the syringe shown in FIG. 1 will be described. The cylinder 2 is filled with the chemical solution S in advance. At this time, as shown in FIG. 1A, the sheath 5 is urged by the spring 6 and is held at the initial position for covering and hiding the injection needle 4. In this state, the injection needle 4 moves so as to be located at the injection site, and one end of the sheath 5 is pressed against the skin to be injected. The sheath 5 is formed of a transparent portion and an opaque portion, and when the injection needle 4 is positioned,
Syringe 1 so that needle 4 is invisible to the recipient
By rotating around the axis, the fear that the injection needle 4 sticks to the skin can be reduced.

Then, by holding the cylinder 2 and further pressing one end of the sheath 5 against the skin, the sheath 5 is retracted against the force of the spring 6 as shown in FIG. Then, the injection needle 4 is exposed from the sheath 5, and the injection needle 4 enters under the skin. Thereafter, as shown in FIG. 1C, the drug 3 is injected into the body by pushing the piston 3.

After injecting the chemical solution S in this manner, FIG.
As shown in (d), by lifting the cylinder 2,
After the injection needle 4 that has entered under the skin comes out of the skin while the sheath 5 remains pressed against the skin by the urging force of the spring 6, the sheath 5 returns to the initial position with respect to the cylinder 2. The sheath 5 is also separated from the skin, and the procedure for injection by the present syringe is completed.

The following embodiments are also included in the present invention.

(1) In a syringe provided with a cylinder for storing a drug solution and a piston reciprocally inserted into the cylinder, a sheath comprising a transparent portion and an opaque portion can be advanced and retracted to the outer periphery of the cylinder. As well as
A needleless syringe, characterized in that the needle is exposed and the urging means for urging the sheath so as to cover the needle is provided. That is, if it is necessary to confirm the injection position by forming a transparent part and an opaque part,
The injection needle can be seen from the transparent part, and if the injection needle is not desired to be seen, it may be covered with an opaque part.

[0014]

According to the present invention, when the syringe is not used, the injection needle is covered with the sheath, so that the injection needle is not accidentally stabbed into another part before the injection treatment. . In addition, the injection needle does not touch any part other than the injection site, which is sanitary. Further, the injection needle can be hidden, and the fear of piercing the injection needle before injection is not given.

[Brief description of the drawings]

1 (a) to 1 (d) are diagrams showing a schematic configuration of a needleless syringe according to an embodiment of the present invention and a method of using the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Syringe 2 Cylinder 3 Piston 4 Injection needle 5 Sheath 6 Spring 7 Projection 8 Projection S Chemical

Claims (1)

[Claims] 1. A syringe provided with a cylinder for storing a drug solution and a piston reciprocally inserted into the cylinder, wherein a sheath is fitted on the outer periphery of the cylinder so as to be able to advance and retreat, and the injection needle can be exposed. And a biasing means for biasing the sheath in a direction covering the injection needle.