JPH105334A - Injection needle with safety device (outside cylinder) - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the infection by an injection needle after use by attaching an outside cylinder to this injection needle to form the needle into double structures and sliding this outside cylinder after use to cover the tip of the injection needle. SOLUTION: The injection needle 1 is provided with the outside cylinder 2 to form the injection needle into the double structures. The tip of the injection needle 1 is held protrusively by about 3mm from the outside cylinder 2 before and at the time of pricking. The injection needle 1 and the outside cylinder 2 are provided with safety devices 3. At the time of removing the injection needle 1, the injection needle 1 is removed but the safety devices 3 of the outside cylinder 2 slide as they are and stay under the skin. At this time, the tip of the injection needle 1 is covered by the outside cylinder 2. When the outside cylinder 2 slides by a prescribed quantity, for example, about 5mm, the respective surfaces of the safety devices 3, 3 respectively come into contact with each other. The sliding of the outside cylinder 2 is thereby stopped and the injection needle 1 is removed from under the skin. The tip of the injection needle 1 is covered by the outside cylinder 2, by which the skin damage by the tip of the injection needle 1 is prevented and the infection is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention has been devised in order to prevent a secondary infection from an injection needle by providing a device in which a sharp tip of the needle is covered after using the injection needle. is there. In a medical institution, after collecting or injecting blood into a patient, the needle may be accidentally stabbed in the hand, etc., which poses a serious problem that there is a danger of viruses and bacteria secondary transmission to blood collectors. . However, an effective method for preventing infection from a needle after use has not been considered. The present invention has been devised to solve this problem. To explain it below: (a) It has a double structure with an outer cylinder attached to the original injection needle,
Before and during insertion, the tip of the sharp needle is about 3 mm outside the outer cylinder.

(B) Safety device (3) for inner cylinder (needle) (1) and outer cylinder (2)
Is provided.

When removing the injection needle, the needle of the inner cylinder is pulled out, but the safety device of the outer cylinder slides and stays under the skin, and at this time, the tip of the inner cylinder is covered by the outer cylinder. When the outer cylinder slides about 5 mm, A
The surface and the B 'surface come into contact with each other, and the A' and B surfaces come into contact with each other, and the sliding of the outer cylinder stops here. In this state, the injection needle is withdrawn from the skin, and the tip of the sharp inner cylinder (needle) is covered by the outer cylinder. At this time, the surfaces a and b are also in contact with each other, and the outer cylinder is locked in this state, and the sharp tip does not damage the skin or the like again.

[Brief description of the drawings]

FIG. 1 is a sectional view of the present invention before and during insertion.

FIG. 2 is a side view of the present invention before and during insertion.

FIG. 3 is an enlarged sectional view of the safety device before and during insertion according to the present invention.

FIG. 4 is a sectional view of the present invention after insertion.

FIG. 5 is a side view of the present invention after insertion.

FIG. 6 is an enlarged sectional view of the safety device after insertion according to the present invention.

[Explanation of symbols]

 1 is an inner cylinder (needle) 2 is an outer cylinder 3 is a safety device

Claims (1)

[Claims] The present invention has a double structure in which an outer cylinder is attached to an original injection needle having a sharp tip, and the sharp tip of the needle is covered by the outer cylinder which slides out after use. Injection needle provided.