JPH11276586A - Injection needle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an injection needle that causes little pain when it is stuck into the skin, to prevent the skin from being hurt little, and to realize speedy recovery of the wound by the needle. SOLUTION: In the needle 1 having the top 3 of the needle that is made into one with a pipe 2 for sending liquid medicine, the tip end 3a of the top 3 of the needle is made almost in a sharp conical shape. Also, the exterior wall 3c of sleeve 3b that is extended from the top end 3a is made as its surface can be round-shaped toward the side wall 2a of the pipe 2 so as not to cut and hurt organic tissues when the needle 1 is inserted into an organism.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection needle which does not cut a living tissue by a needle tip of the injection needle when the injection needle is pierced into skin or the like, and causes less painful stimulation of nerve endings.

[0002]

2. Description of the Related Art Conventionally, when an injection is made, a great pain is felt when the injection needle is inserted into the skin. In addition, cuts of the injection needle may be made on the skin or blood vessels, and blood may flow out. The reason for this is that the tip of the needle tube of the injection needle is cut obliquely, and the tip of the injection needle is hyperbolic and thin and sharp.
(Shown in FIG. 3) is formed, and when the needle tip pierces the skin or the like, the blade portion A penetrates the living tissue while sharply cutting the living tissue.

Further, as shown in FIG. 3, a thin and sharp blade portion B is formed at the opening edge inside the tube of the injection needle by oblique cutting. Since the blade portion B is also directed in the invasion direction, the biological tissue that has slightly protruded into the tube may be cut off. When the tissue of the living body such as the skin, blood vessels, and internal organs is cut by the blades A and B, the pain at the nerve endings is stimulated to make the patient feel painful, and the blood cuts off the capillaries and the like. It is. Then, the cut portion is small but scratches. It takes time to regenerate (heal) the cut tissue.

[0004] In order to reduce injection pain,
2. Description of the Related Art In order to reduce penetration resistance of a needle surface into a tissue, a silicone coating film or the like is formed on the surface of an injection needle. However, in recent years, the use of needles that have been subjected to the silicon film forming method has been decreasing due to the economical reason that silicon has side effects and that the film forming process is costly. Under such circumstances, severe pain is unavoidable at the time of injection, and this results in an increase in children's dislike of injection.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and when a needle is pierced into the skin, the pain is less than that of a conventional needle, and a cut is made in a living tissue. An object of the present invention is to provide an injection needle that is not attached, and as a result, an injection needle that can prevent outflow of blood and achieve early healing of a puncture wound.

[0006]

In order to solve the above-mentioned problems, the present invention relates to a syringe needle 1 having a needle tip 3 formed integrally with a liquid feeding pipe section 2; Tip 3a
Is formed into a sharp, substantially conical shape, and the outer peripheral wall surface 3c of the skirt portion 3b extending from the tip 3a is formed into a curved surface up to the side wall surface 2a of the liquid feeding tube portion 2, so that the injection needle 1 enters the living body. The injection needle is characterized in that it does not cut a living tissue when performing.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. According to the present invention, as shown in FIG. 1, in a syringe needle 1 having a needle tip 3 formed integrally with a liquid feeding tube 2, a tip 3a of the needle tip 3 is smoothly stabbed into tissue. In order to facilitate it, it is formed in a sharp, substantially conical shape. Then, as shown in FIGS. 2A and 2B, a sharp blade cannot be formed from the front end 3a to the outer peripheral wall surface 3c of the hem portion 3b leading to the side wall surface 2a of the liquid feed pipe portion 2. As shown in FIG.

[0008] Until now, when an injection needle is used, the living tissue is cut when pierced, as shown in FIG.
This is because a thin and sharp blade portion A is formed at the tip of the conventional injection needle. In the present invention, in order not to cut a living tissue at the needle tip 3 of the injection needle 1, no blade is formed on the outer peripheral wall surface 3c of the needle tip 3 in a direction in which the injection needle enters.

Further, as shown in FIG. 4, the opening edge 4 inside the tube of the injection needle 1 is also formed into a round chamfered shape 5. Then, the blade portion B as shown in FIG. 3 is not formed at that portion as in the conventional injection needle 1. As a method of processing the blade portion of this portion, as shown in FIG. 5, there is a method of avoiding contact with a living tissue by bending the blade portion 6 inward, but in this method, the diameter of the tube is small. Is not preferred.

[0010]

As described above, according to the present invention, since the tip 3a of the needle tip of the injection needle 1 is sharp, the needle tip of the injection needle can be easily pierced with little resistance to the living tissue and smoothly. Can penetrate. Since the living tissue is highly flexible when it penetrates deeper from the tip of the extremely small needle, the living tissue gradually spreads as the needle penetrates into the living tissue as it penetrates into the portion following the tip 3a to the skirt 3b. Can be At this time, the puncture caused by the tip 3a is unavoidable, but the puncture caused by the tip 3a is unavoidable because there is no blade directed in the traveling direction of the injection needle. Never be cut. Also, when the injection needle 1 is withdrawn, there is no resistance to catch and damage the living cell tissue, and even after the withdrawal, the temporarily expanded living tissue contracts due to the intrusion of the liquid feeding tube portion 2 to the original state. To recover quickly.

Thus, even if the injection needle 1 is pierced, the skin,
Since cell tissues such as blood vessels and internal organs are not cut off, stimulation of pain points at nerve endings hardly occurs, so that injection pain is reduced. In addition, bleeding does not occur because the capillaries and the like are not cut, and even if a puncture is made, the healing of the injected wound is extremely fast because it is extremely small.

[Brief description of the drawings]

FIG. 1 is a perspective view of the present invention.

FIG. 2A is a cross-sectional view taken along the line CC of FIG.
Is a sectional view taken along the line DD.

FIG. 3 is a perspective view showing a conventional needle tip.

FIG. 4 is a vertical side view of FIG. 1;

FIG. 5 is a longitudinal sectional side view of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection needle 2 Liquid feed pipe part 2a Side wall surface of liquid feed pipe part 3 Needle tip 3a Tip of needle tip 3b Hem part of needle tip 3c Outer peripheral wall surface of needle tip 4 Opening edge of liquid feed pipe 5 Circular chamfered portion of opening edge 6 Inner tube bent portion of opening edge 7 Rounded surface

Claims (1)

[Claims] 1. A syringe needle (1) having a needle tip (3) formed integrally with a liquid feeding pipe part (2), wherein the tip (3a) of the needle tip (3) is sharpened substantially. The conical shape is formed, and the outer peripheral wall surface (3c) of the hem portion (3b) continuing from the tip (3a) is formed into a curved surface up to the side wall surface (2a) of the liquid feeding tube portion (2). (1) An injection needle which does not cut a living tissue when it enters a living body.