JP2537752Y2 - Medical needle - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the improvement of medical needles such as venous needles, AVFs, specific gravity needles, blood collection needles and the like equipped with a metal needle tube.

[0002]

2. Description of the Related Art Medical needles currently used are discarded after collecting blood or the like and attaching a needle cap to a needle base having a metallic needle tube attached thereto. Normally, blood remains in the needle tube of the medical needle or the liquid passage of the needle base, and when the operator mounts the needle cap on the needle base, the needle tube may point the operator's finger, or the needle cap and the needle Since the base is familiar and the fit may not be good even after reinsertion, blood remaining in the medical needle may leak from the gap between the needle base and the needle cap and adhere to the operator. Therefore, there is a risk that infections such as hepatitis C and AIDS may occur.
The inventor of the present invention has conducted intensive studies to solve the above problems, and has arrived at the following invention.

[0003]

FIG. 1 is a schematic view of a medical needle 1 of the present invention, FIG. 2 is a partially cutaway sectional view of FIG. 1, and FIG.
Is a perspective view of a state before blood or the like is collected.
The medical needle 1 includes a needle base 2 on which a metal needle tube 4 is mounted, and a needle cap 3 on which an elastic material 5 is loaded.
The needle base 2 is, for example, polypropylene, polyethylene,
A flange 6 and a pair of rectangular wings 7 protruding from the flange 6 are integrally formed so as to face each other at an angle of about 180 ° and made of a hard synthetic resin such as polyvinyl chloride, polycarbonate, or ABS.

[0004] The needle cap 3 is made of, for example, a hard synthetic resin such as polypropylene, polyethylene, polyvinyl chloride, polycarbonate, ABS, or the like, and has a pair of rectangular portions of the mounting portion 8 of the needle base 2 and the wing portion 7. The fitting groove 9 is formed at a position of substantially 90 degrees with respect to the wing portion 7 and substantially 180 degrees. The medical needle 1 is assembled by fitting the distal end 2 a of the needle base 2 and the mounting portion 8 of the needle cap 3. The formation angle of the wing 7 and the fitting groove 9 is about 180 ° and about 9
The reason why the angle is set to 0 ° is to allow these to be regarded as substantially the same as those invented in the present application, because a slight molding error may deviate from ± 1 ° to about 2 °.

[0005] A rib 11 is formed on the outer peripheral surface of the needle cap 3 so that the needle cap 3 can be easily rotated. In order to fix the needle tube 4 to the needle base 2, an epoxy resin 12 is used at the base of the needle tube 4.

In a state before use, that is, before blood or the like is collected, the needle tube 4 of the medical needle 1 is protected by the needle cap 3 to maintain sterility without coming into contact with outside air. The tip of the needle base 2 is prevented from entering the depth of the needle cap 3 by contacting the wing 7.
For this reason, the blade surface 10 of the needle tube 4 does not touch the elastic member 5.

FIG. 4 (FIG. 5 is a sectional view of FIG. 4) shows a state after use, that is, a state when blood and the like are collected and discarded. That is, by rotating the needle base 2 by 90 ° and the pair of wings 7 of the needle base 2 being fitted into the pair of fitting grooves 9 of the needle cap 3, the tip 2 a of the needle base 2 is The needle tube 4 penetrates all the way, and the blade surface 10 of the needle tube 4 is pierced by the elastic member 5 to completely enter the elastic member 5, whereby the needle base 2 and the liquid passage of the needle tube 4 are sealed. Thereby, even if blood remains in the liquid passage of the needle tube 4 and the needle base 2, the blood does not leak from the gap between the needle base 2 and the needle cap 3.

In the present invention, the elastic material 5 is rubber such as silicone rubber, natural rubber, soft synthetic resin or the like.
The shape may be spherical or cylindrical. In short, any shape that can maintain liquid tightness when the blade surface 10 is pierced may be used.

[0009]

As described above, the present invention can maintain the sterility before the use of the needle tube 4 and the state in which the blade surface 10 and the elastic member 5 do not come into contact with each other. After the use of the needle tube 4, the pair of wings 7 of the needle base 2 are attached to the needle cap 3.
The tip 2a of the needle base 2 goes into the depth of the needle cap 3, and the blade surface 1 of the needle tube 4 is fitted.
0 is punctured by the elastic member 5 and completely enters the elastic member 5 to maintain a state in which the liquid passages of the needle base 2 and the needle tube 4 are sealed, so that the needle cap does not come off after being discarded and is discarded. At this time, blood and the like remaining inside do not leak, so that it is safe.

[Brief description of the drawings]

FIG. 1 is a schematic view of the medical needle of the present invention.

FIG. 2 is a cutaway sectional view of FIG.

FIG. 3 is a perspective view of FIG. 1;

FIG. 4 is a view showing a use state of a medical needle.

FIG. 5 is a perspective view of FIG. 4;

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Medical needle 2 Needle base 3 Needle cap 4 Needle tube 5 Elastic material 6 Flange part 7 Wing part 9 Fitting groove 10 Blade surface

Claims (1)

(57) [Scope of request for utility model registration] 1. A needle base 2 on which a metallic needle tube 4 is mounted, and a needle cap 3 on which an elastic material 5 is loaded. The needle base 2 has a flange 6 and a pair protruding from the flange 6. The wings 7 are integrally formed so as to face each other by approximately 180 °. The needle cap 3 has a pair of rectangular fitting grooves 9 between the mounting portion 8 of the needle base 2 and the wings 7. The needle tube 4 is formed at a position substantially 90 ° opposite to the wing 7 and substantially 180 °. Before use of the needle tube 4, the needle tube 4 is protected by the needle cap 3, and the blade surface 10 does not contact the elastic material 5. After the use of the needle tube 4, the pair of wings 7 of the needle base 2 are fitted into the pair of fitting grooves 9 of the needle cap 3, so that the distal end 2 a of the needle base 2 enters the depth of the needle cap 3, The blade surface 10 of the needle tube 4 is pierced by the elastic material 5 and completely penetrates into the elastic material 5, and the needle base 2 and the liquid passage of the needle tube 4 are sealed. Medical needle 1, characterized in that, to maintain the state.