JP2668337B2 - Injection needle cap - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an injection needle cap for covering the needle tip of an injection needle before or after use to prevent the needle tip from being exposed.

[0002]

2. Description of the Related Art If an injection needle is exposed before or after injection, there is a danger that a finger may be damaged by contact with the needle tip or an accident such as infection of a pathogenic bacterium may occur due to the contact. For this reason, a deep-bore bottomed cylindrical injection needle cover that inserts the entire needle into the hollow portion of the deep hole is widely used. However, the general-purpose deep-bottomed cylindrical needle cover has the risk of inadvertently touching the tip of the needle when it can be covered with a long used needle. When the product is put into a clothing pocket, there is a problem that the injection needle cover comes off and the needle tip is exposed. In order to solve the problem of the general-purpose injection needle cover, Japanese Patent Application Laid-Open No. 5-33 is disclosed.
There is a known example disclosed in JP-A-7181 / JP-A-3-504205.

That is, the former known example is provided with a straw penetrating the injection needle, connected to the base of the injection needle by a string-shaped stopper, and pulling the straw with a fingertip or using absorbent cotton for pressing the affected part at the time of injection. By pressing it, the straw is moved to the needle tip, the needle tip is hooked and locked at the step inside the straw, and the needle tip is stored in the straw.The latter is a coil with a cap at the tip. When the spring is fitted on the injection needle and the injection needle is used, the coil spring is brought into a compressed state, the compression posture of the coil spring is held by the fastener, and the front half of the injection needle is protruded. When you remove the fastener, the coil spring will be in a free state, and if you take it with your fingertip and stretch it further to cover the tip cap with the needle tip, the needle tip is stopped in the slot hole in the cap, Has a structure tip is housed in Yap.

[0004]

In the former known example described above, when the injection needle is inclined at the time of injection, the straw slides near the tip of the injection needle, so that injection into the affected part is performed. In addition, it may be difficult to press the straw with the absorbent cotton that has pressed the affected area, and it is necessary to take the straw with your fingertip and cover it with the needle tip.
There is a risk of contact between the needle tip and fingertip, resulting in poor usability and safety.

On the other hand, in the latter case, the work of setting the coil spring in the compression posture before the injection and setting it with the fastener is difficult and troublesome, and if the setting work is deficient, the injection is performed. There is a possibility that the fastener will come off inside and the coil spring will stretch and come into contact with the affected area, or the posture of the injection needle that has been inserted into the body will be disrupted. When the needle tip is stored, there is a risk of contact between the needle tip and the finger tip, which is inferior in usability and safety, and the structure is complicated and the cost is high.

[0006] The present invention provides a needle cap that solves the above-mentioned drawbacks of the prior art.

[0007]

The injection needle cap of the present invention for solving the above technical problems has a needle hole penetrating the injection needle and a bottomed hole for accommodating the needle tip of the injection needle. A cap portion slidably fitted on the injection needle, and a pair of bow springs symmetrically curved and bulging around the fitted needle, and a joined upper end is connected to the cap portion. The needle hole is inclined with respect to the axis of the pair of bow springs, and the storage hole is disposed in parallel with the axis. Further, the pair of bow springs has a compression posture in a free state, and has a shape in which a front half portion of the injection needle penetrating the needle hole is projected from the cap portion, and the pair of free postures is provided. And stretch the bow spring of By the free state, the needle tip placed in the receiving hole has a structure "which Kutsugaechaku setting said cap portion to the needle point.

[0008]

In the injection needle cap of the present invention having the above-described structure, as described above, the elastic spring in the free position exhibits the compression position, and the first half of the injection needle penetrating the needle hole of the cap portion projects. Smooth injections can be made. After use, the elastic spring is pinched and pressed with the fingertip, and when the fingertip is released, the cap that slides up due to the extension of the elastic spring reaches the needle tip. When the compression is restored, the cap that slides down the injection needle by the compression force will correct its own posture along the axis of the bow spring by the left-right balanced elastic force of the pair of bow springs and descend. Therefore, the needle tip portion is inserted into the accommodation hole located on the axis thereof, and the cap portion is automatically accommodated and set by pulling the cap portion toward the needle base portion by the compressive force of the bow spring.

In the case of the storage set, the fingertips only need to clamp and hold the elastic support spring and release it, and it is completely unnecessary to bring the fingertips near the needlepoints. There is no risk of contact, and in addition, the cap covered on the needle tip in its stored and set state always receives the pulling force of the elastic spring.Therefore, there is no danger that the needle tip will come off the cap, making it safe and accurate. The needle tip can be stored and protected.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of the present invention. That is, the injection needle cap 1 of the present invention has a needle hole 5 through which an injection needle 10 is slidably inserted, and a storage hole 6 into which a needle tip 11 of the injection needle 10 is inserted.
And a pair of band-shaped bow springs 3A.
3B are symmetrically combined with the longitudinal axis 8 of the cap portion 2 as an axis, the upper end is connected to the cap portion 2, and the lower end is constituted by the elastic support spring 4 that is locked to the injection needle base 12.

More specifically, the cap portion 2 is a small columnar body made of resin or the like which is fitted in the middle of the injection needle 10, and a needle hole 5 and a storage hole 6 having a common hole 7 for receiving the needle tip 11 are provided. The storage hole 6 is located on the shaft center 8 to form a bottomed hole having an upper bottom, and the needle hole 5 is a straight through hole inclined with respect to the shaft center 8 at an arbitrary angle θ.

The bow springs 3A and 3B of the elastic spring 4
Is an elastic body made of a band-shaped resin material, and has a compressed shape that bulges outward in a free state. When the outside of the arcuate springs 3A and 3B is pinched and held by the fingertips, the arcuate springs 3A and 3B It is easily elastically deformed and expanded, and when the fingertip is released, it is automatically restored to the original compressed posture by the elastic force.

Then, the above-mentioned cap portion 2 and elastic spring 4
1C, the lower end of the elastic support spring 4 is fixed to the injection needle base 12 by means such as adhesion, and injection into the needle hole 5 of the cap 2 is performed. When mounted through the needle 10, the cap 2 is
While being held in the middle of 0 or in the middle near the base 12,
When the elastic support spring 4 is pressed down with a fingertip, the cap portion 2 reaches the needle tip 11, and the needle tip 11 has a relative shape so as to face the entrance of the storage hole 6. The axis 8 coincides with the needle axis 13 of the injection needle 10.

The above injection needle cap 1 is shown in FIG.
Referring to (E), when the pair of bow springs 3A and 3B of the elastic spring 4 which is attached to the injection needle 10 and assumes a free posture is sandwiched between fingertips and pressed, the bow springs 3A and 3B are elastically recessed and extend. Following the extension, the cap 2 slides on the injection needle 10 and reaches the needle tip 11.

Then, when the operator arrives at the needlepoint 11 and releases the gripping fingertip, the bow springs 3A and 3B are released.
By the restoring elastic force, the cap portion 2 receives the force of the downward movement, and at the same time, the cap portion 2 in the posture inclined to the needle axis 13 receives the uniform pulling force by the pair of symmetrical bow springs 3A and 3B, Since the self-axis 8 is automatically corrected to the normal posture in which the axis 8 coincides with the needle axis 13, the needle point 11 automatically enters the storage hole 6 of the cap section 2 which has started downward, and the cap section 2 While covering the cap 11, the cap portion 2 in the covering posture is held by the elastic compression force of the bow springs 3A and 3B without being easily detached from the needle tip 11.

When it is necessary to remove the cap 2 from the needle tip 11, the slightly loosened bow springs 3A and 3B
Push it all the way in again and tilt the cap part 2 a little,
The needle tip 11 comes out of the storage hole 6 and changes into the needle hole 5, and the cap 2 automatically returns to the original original position in the middle of the injection needle 10. The above-described embodiment has the above-described operation.

The injection needle cap 1 of the present invention is not limited to the above-mentioned embodiment, and the arcuate springs 3A and 3B may be wire springs or metal springs.
The needle hole 5 and the storage hole 6 do not share the hole 7, but are individually drilled.

[0018]

As described above, according to the injection needle cap of the present invention, the cap portion elastically supported by the elastic spring has:
Since it is accurately held in the middle of the injection needle, there is no risk of impairing the injection work of the injection needle, and a good injection function can be ensured. Then, after using the injection needle, the cap is covered with the needle tip simply by holding and pressing the elastic support spring with the fingertip and releasing it, and the covering position is locked by the elastic urging force. , It is extremely easy to cover the needle tip, there is no risk of coming off, and it is extremely safe and usable,
The needle tip cover protection performance is stable. And, since it can be provided at a low cost with a simple structure, it can be widely spread in the field, and has various effects that contribute to further effective prevention of troubles such as body damage and transmission of pathogenic bacteria by a syringe needle.

[Brief description of the drawings]

FIG. 1 shows a needle cap of one embodiment of the present invention;
(A) is a perspective view thereof, (B) is a front view thereof, (C) is a front view of a state of being attached to an injection needle, and (D) and (E) are front views showing its use state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection needle cap 2 Cap part 3A / 3B Bow spring 4 Resilient spring 5 Needle hole 6 Storage hole 7 Hole 8 Cap shaft axis 10 Injection needle 11 Needle tip 12 Injection needle base 13 Needle axis

Claims (1)

(57) [Claims] 1. A cap portion having a needle hole penetrating an injection needle, a storage hole having a bottomed hole for storing a needle tip of the injection needle, and a cap portion slidably fitted to the injection needle, and the fitted injection. A pair of arcuate springs symmetrically bulging symmetrically around the needle as an axis, and connecting the joined upper end to the cap portion,
The needle hole is inclined with respect to the axial center of the pair of arcuate springs, and the accommodating hole is arranged in parallel with the axial center. Further, the pair of bow springs have a compression posture in a free state, and have a shape in which a front half of the injection needle penetrating the needle hole is projected from the cap portion, and the pair of the free postures is formed. An injection needle cap having a structure in which an arcuate spring is sandwiched and extended, and then freed, whereby the needle tip is inserted into the storage hole, and the cap portion is covered and set on the needle tip.