JP2000084077A - Syringe with needle cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lock a syringe body and a needle cap so that the needle cap does not come off easily when not in use, and to easily release the locked state when in use. Provided is a syringe with a needle cap which can be removed with one hand operation. A needle support member (4) having a needle (5) attached so as to protrude forward is provided at a front end of a syringe body (1), and a needle cap (9) is fitted on the needle support member (4) to cover the needle (5). Locking means such as ridges 6 and 10 are provided to lock the needle support member 4 and the needle cap 9 in a fitted state with each other, and also contact the needle support member 4 and the needle cap 9 in the fitted state. The inclined surfaces 8 and 11 displaced in the axial direction and the circumferential direction are provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a syringe with a needle cap.

[0002]

2. Description of the Related Art If a needle cap of a syringe is easily removed, an accident in which a needle is erroneously stabbed in a finger of a medical staff or the like may increase. Therefore, the needle cap and the syringe body are often provided with locking means.

[0003] However, if the needle cap and the syringe body are structured to be locked, it is necessary to hold the syringe body with one hand and pinch the needle cap with the other hand and pull it out strongly when performing injection. It was difficult to remove with one hand.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention can lock the syringe body and the needle cap so that the needle cap does not come off easily when not in use, and when the injection is carried out, An object of the present invention is to provide a syringe with a needle cap that can easily release the locked state and remove the needle cap with one hand operation.

[0005]

In order to solve the above-mentioned problems, a syringe with a needle cap according to the present invention is provided with a needle support member 4 having a needle 5 mounted so as to protrude forward, at the front end of the syringe body 1. A needle cap 9 fitted to the needle support member 4 to cover the needle 5, and the projections 6, 10, etc. engaged with the needle support member 4 and the needle cap 9 in a state of being fitted to each other. A stop means is provided, and inclined surfaces 8 and 11 that are displaced in an axial direction and a circumferential direction that are in contact with each other while being fitted to the needle support member 4 and the needle cap 9 are provided. Things.

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. First, in the drawing, reference numeral 1 indicates a syringe body.
The syringe body 1 has a cylinder 2 and a piston 3 that is slidable in the front-rear direction with respect to the cylinder 2. A small-diameter needle support member 4 is provided at the front end of the cylinder 2, and the needle support member 4 The needle 5 is projected forward.

A needle cap 9 described later can be fitted to the needle support member 4, and a circumferential ridge 6 is provided on the outer periphery of the needle support member 4 to lock the fitted needle cap 9. Is provided.

[0008] Similarly, the needle supporting member 4 in the syringe body 1
A needle cap receiver 7 for abutting the fitted needle cap 9 on the front edge thereof is provided at a position rearward of the ridge 6 on the outer peripheral portion of the needle cap. And. The needle cap receiver 7 is displaced in the front-rear direction at its front edge, that is, in the axial direction, and
An inclined surface 8 that is displaced in the circumferential direction is provided.

Next, in the drawings, reference numeral 9 denotes a needle cap. The needle cap 9 has a hollow cylindrical shape with one end opened, and is fitted to the needle support member 4 of the syringe body 1 as described above so that the needle 5 can be housed therein.

The needle cap 9 has a circumferential ridge 10 on the inner surface near the opening edge, which is fitted over the needle support member 4 of the syringe main body 1 so as to ride over the ridge 6 and lock it. ing. Note that both the needle cap 9 and the needle support member 4 are made of plastic, and the ridge 10 of the needle cap 9 can pass over the ridge 6 of the needle support member 4 by elastic deformation.

Further, an inclined surface 11 which is displaced in the front-rear direction, that is, in the axial direction, and is also displaced in the circumferential direction is also provided on the opening edge of the needle cap 9. The inclined surface 11 provided on the needle cap 9 and the inclined surface 8 provided on the needle cap receiver 7 have the same gradient, and the needle cap 9 is fitted to the needle support member 4 so that both the ridges 6, 10 are formed. The inclined surface 11 of the needle cap 9 is in contact with the inclined surface 8 of the needle cap receiver 7 in a state in which the needle cap 9 is locked to each other.

When removing the needle cap 9 from the syringe body 1 for performing an injection, the following operation is performed. That is, as shown in FIG. 5, in a state where the needle cap 9 is fitted to the needle support member 4 of the syringe main body 1, the thumb of one hand holding the syringe main body 1 is applied to the side surface of the needle cap 9, and the needle is moved. Cap 9
The needle cap 9 is rotated in a direction in which the inclined surface 11 is pressed against the inclined surface 8 of the needle cap receiver 7. This needle cap 9
Is converted into a force for pushing the needle cap 9 in the axial direction by the action of the inclined surface 8 of the needle cap receiver 7.
As a result, the needle cap 9 moves forward with respect to the syringe main body 1, and the locked state between the ridge 10 of the needle cap 9 and the ridge 6 of the needle support member 4 is released. Therefore, the needle cap 9 can be easily removed from the syringe body 1 by one-handed operation.

In the above embodiment, the inclined surface 11 is provided at the opening edge of the needle cap 9, but the inclined surface 11 may be provided on the inner surface of the needle cap 9 as shown in FIG. . With such a configuration, both the inclined surfaces 11 and 8 can be concealed in a state where the needle cap 9 is fitted to the needle support member 4, and the appearance design can be improved.

[0014]

The syringe with a needle cap according to the present invention is as described above. When the needle cap 9 is fitted to the needle support member 4 of the syringe body 1, both the ridges 10, 6 are mutually connected. By locking, the needle cap 9 does not come off easily. Therefore, it is possible to prevent an accident in which the needle 5 is erroneously stabbed in the finger of the medical staff. Further, when performing injection, the needle cap 9 can be easily removed from the needle support member 4 of the syringe body 1 by rotating the needle cap 9 with one hand operation, so that it is convenient to use.

[Brief description of the drawings]

FIG. 1 is a side view in a state where a needle cap is removed from a syringe main body.

FIG. 2 is a plan view in a state where a needle cap is removed from a syringe main body.

FIG. 3 is a bottom view in a state where a needle cap is removed from a syringe main body.

FIG. 4 is a cross-sectional view of a state where the needle cap is fitted to the syringe body.

FIG. 5 is a side view showing a state where an operation of removing a needle cap from a syringe body is performed.

FIG. 6 is a cross-sectional view of a state where the needle cap is fitted to the syringe body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Syringe main body 2 Cylinder 3 Piston 4 Needle support member 5 Needle 6 Projection 7 Needle cap receiver 8 Inclined surface 9 Needle cap 10 Projection 11 Inclined surface

Claims (1)

[Claims] 1. A needle support member (4) having a needle (5) attached so as to protrude forward is provided at the front end of a syringe body (1). Locking means such as ridges 6 and 10 are provided for locking the needle support member 4 and the needle cap 9 in a fitted state with each other. A syringe with a needle cap, comprising inclined surfaces 8 and 11 displaced in an axial direction and a circumferential direction in contact with each other.