JPH076885Y2 - Blood collection needle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is an improvement of a blood collection needle used for a blood collection bag, in particular, a needle base and a needle cap are fixed by an adhesive and airtightness is secured. The present invention relates to a blood collection needle.

[Prior Art and Problems of Prior Art] FIG. 4 is a schematic view of a conventional blood collection needle 40.

The blood collection needle 40 is composed of a needle base 41 and a needle cap 42.

The needle base 41 has a needle portion 44 implanted therein, a fitting portion 45 protruding from the front, and a tube fixing groove 43 formed on the inner rear surface. Further, the needle cap 42 has a fitting portion 46 formed on the inner rear surface.

At present, the fitting portion 45 of the needle base 41 is coated with the adhesive 47 and then the needle cap 42 is capped, and the fitting portion of the needle base 41 is covered.
The airtightness is ensured by fitting 45 and the fitting portion 46 of the needle cap 42 and solidifying the adhesive 47.

However, when the needle base 41 is capped with the needle cap 42,
The adhesive 47 applied to the needle base 41 protrudes from the joint surface of the needle cap 42 and the needle cap 42 and adheres to the hands of the workers and the manufacturing machine during manufacturing, which is not hygienic and also has a beautiful appearance in the finished product. Was spoiling.

Further, since the amount of the adhesive 47 applied is not constant, air tightness may not be ensured in some cases.

Besides, when used, the adhesive 47 was lacking and was not hygienic.

[Means for Solving the Problems]

[1] The present invention provides [1] a blood sampling needle 1 constructed by covering a needle base 2 with a needle cap 3, in which the needle base 2 has a needle portion 4 implanted therein and a fitting portion 5 protruding forward. The needle cap 3 is provided with a joint surface facing the joint surface of the needle cap 3, an annular groove 7 is formed in the joint surface, and a notch 8 communicating with the annular groove 7 is formed. A joint surface facing the joint surface of the needle base 2 is formed on the rear side, an annular groove 10 facing the annular groove 7 is formed on the joint surface, and a fitting portion corresponding to the fitting portion 5 on the inner rear surface. 9 is provided, and a blood collecting needle in which a space formed by the annular groove 7 and the annular groove 10 is filled with an adhesive 11 is provided.

The present invention provides [2] the medical needle according to the above [1], wherein the annular groove 7 on the needle base 2 side is formed deeper than the annular groove 10 on the needle cap 3 side.

[Embodiment] FIG. 1 is a sectional view showing an embodiment of the present invention.

The blood collection needle 1 of the present invention comprises a needle base 2 and a needle cap 3 made of a hard synthetic resin such as hard vinyl chloride or polycarbonate.

The needle base 2 has a needle portion 4 implanted therein and a fitting portion 5 protruding forward. Further, a joint surface facing the joint surface of the needle cap 3 is formed on the outer periphery, and an annular groove 7 and a cutout portion 8 communicating with the annular groove 7 are formed on the joint surface. In FIG. 1 (FIG. 2), two notches 8 are formed. One notch 8 is for injecting an adhesive and the other notch 8 is for venting air. A tube fixing groove 6 is formed on the inner rear surface of the needle base 2.

A fitting portion 9 corresponding to the fitting portion 5 is formed on the inner surface of the needle cap 3 at the rear side, and a bonding surface facing the bonding surface of the needle base 2 is formed at the rear surface. An annular groove 10 facing the fitting groove 7 is formed on the joint surface.

The annular grooves 7 and 10 have different depths, the annular groove 7 on the needle base 2 side is formed deep, and the annular groove 10 on the cap 3 side is formed shallow.

Next, a method of using the present invention will be described.

First, the needle cap 3 is capped on the needle base 2 in which the tube is fixed in the tube fixing groove 6.

At this time, the annular grooves 7 and 10 overlap each other to form an annular space from the grooves 7 and 10 as shown in FIG.

After that, when the adhesive 11 is injected through the notch 8, the adhesive 11
11 spreads evenly in the annular space and solidifies to form a needle base 2
The needle cap 3 and the needle cap 3 are completely adhered to each other, and airtightness can be secured.

Further, since the adhesive 11 easily releases the close contact along the curved surfaces of the grooves 7 and 10, it can be easily opened by pulling out the light needle cap 3 from the needle base 2.

At this time, the adhesive 11 which is solidified in the annular space is fixed to the deeply formed annular groove 7 on the side of the needle base 2 so that the adhesive 11 does not drop off from the needle base 2 or the needle cap 3 at the time of unsealing and is hygienic. Target.

Further, since the adhesive 11 does not stick out from the needle cap 3 and the needle base 2, the appearance of the blood sampling needle 1 is not impaired.

[Advantageous Effects of the Invention] As described above, the present invention provides the notch 8 into the annular space formed by the annular grooves 7 and 10 provided on the opposing surfaces of the needle base 2 and the needle cap 3.
By injecting the adhesive through the resin, the needle base 2 and the needle cap 3 can be airtightly fixed because they are uniformly spread and solidified in the annular space formed by the annular groove portions 7 and 10.

When the needle cap 3 is removed without sticking out of the adhesive 11 from the insides 7 and 10 of the groove, the adhesive 11 is fixed to the annular groove 7 on the side of the needle base 2 so that the adhesive is released and dust is generated. Never becomes.

It is an excellent device that has the effects of the above.

[Brief description of drawings]

1 is a sectional view of a blood collecting needle of the present invention, FIG. 2 is a front view of a needle base of the present invention, FIG. 3 is a partially enlarged sectional view of FIG. 1, and FIG.
The figure shows a partially enlarged cross-sectional view of a conventional blood collection needle. In the figure, 1 is a blood collecting needle, 2 is a needle base, 3 is a needle cap, 4 is a needle part, 5 and 9 are fitting parts, 6 is a tube fixing groove, 7 and 10 are annular grooves, 8 is a notch part, 11 Indicates an adhesive.

Claims (2)

[Scope of utility model registration request] 1. A blood collecting needle 1 constructed by covering a needle base 2 with a needle cap 3, wherein the needle base 2 has a needle portion 4 implanted therein and a fitting portion 5 protruding forward. Then, a joint surface facing the joint surface of the needle cap 3 is formed on the outer periphery, an annular groove 7 is formed in the joint surface, and a notch 8 communicating with the annular groove 7 is formed. Is formed with a joint surface facing the joint surface of the needle base 2, an annular groove 10 is formed on the joint surface so as to face the annular groove 7, and a fitting portion 9 corresponding to the fitting portion 5 is formed on the rear inner surface. And a space 11 formed by the annular groove 7 and the annular groove 10 is filled with an adhesive agent 11. 2. The medical needle according to claim 1, wherein the annular groove 7 on the needle base 2 side is formed deeper than the annular groove 10 on the needle cap 3 side.