JP2002102344A - Puncture tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a puncture tool capable of being easily detached from a medical tool such as syringe in the state of covering the needle body with a protector after use while maintaining improvement in operability in use in the puncture tool with protector by which the tip of a needle can surely be covered in comparatively simple structure so that a hub is provided with the protector to be turned toward the needle body to cover the needle body. SOLUTION: This tool is provided with a rotation preventing means, which is composed of a projecting part 31 of a protector 3 and a rib 23 of a hub 22, for regulating the axial rotation of the protector 3 to a needle body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical puncture device used for puncturing a blood vessel during injection, infusion or blood collection.

[0002]

2. Description of the Related Art In recent years, erroneous insertion when capping a used injection needle or the like has become a problem, and various techniques have been disclosed in order to solve the problem. Some hubs are provided with a protector that rotates to cover the needle body. These are relatively simple in structure and can provide a certain effect because they can cover the needle tip reliably.
Further, in consideration of improvement in operability during use, a protector is provided so as to be capable of rotating the shaft with respect to the needle body so that the operator can arbitrarily set the protector at a position where it does not interfere with operation. ing.

[0003] However, when the needle covered with the protector is removed from a medical device such as a syringe due to disposal after use, the connection between the needle hub and these medical devices is performed by friction fitting or screw fitting. For this reason, it is common practice to twist the hub relative to the medical device in the axial rotation direction and then remove the hub. Therefore, in the case where the protector is provided so as to be able to rotate with respect to the needle body so that the protector does not interfere with the operation as described above, only the protector rotates when trying to remove the protector. It may be difficult to disconnect the instrument.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a puncture device which can be easily removed from a medical device such as a syringe with a protector covering the needle after use, while maintaining operability during use. Is to provide.

[0005]

The above object is achieved by the present invention described below.

(1) The present invention provides a needle body having a sharp needle tip, a hub provided at a base end of the needle body, a first position separated from the needle body, and at least one of the needle bodies. A puncture device having a protector provided on the hub so as to be rotatable between a second position covering the needle tip, wherein the needle of the protector is provided when the protector is at the second position. A puncture device comprising a rotation preventing means for restricting rotation of a shaft with respect to a body.

(2) The present invention is characterized in that the protector is rotatable with respect to the needle body when the protector is at the first position, and is provided by the rotation preventing means when the protector is at the second position. The puncture device according to the above (1), wherein the rotation of the shaft is restricted.

(3) The present invention is characterized in that the protector is provided on the hub by fitting a collar connected to a base end of the protector into the hub. ).

(4) The present invention is characterized in that the rotation preventing means comprises an uneven portion provided on at least one of a base end of the protector and the hub. 2. The puncture device according to 1.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a puncture device according to the present invention will be described below. The puncture device 1 shown in FIGS. 1 and 2 has a needle body 2 having a sharp needle tip 21 and a hub 22 provided at a base end, and a first position separated from the needle body 2 (the state of FIG. 1).
And a second position covering the needle tip 21 of the needle body 2 (the state of FIG. 2).
And a protector 3 provided on the hub 22 so as to be rotatable therebetween.

The protector 3 has a projection 31 near its base end and a slit 32 extending in the longitudinal direction for accommodating the needle body 2.
Are provided. A collar 4 is connected to the protector 3 via a rotation shaft 5 at a base end thereof.
The protector 3 is connected to the hub 22 by fitting the collar 4 into the hub 22.

The hub 22 has a plurality of ribs 23 near the tip.
Is provided, and the collar 4 is fitted from the middle to the rear end. The number of the ribs 23 is not particularly limited.

The collar 4 is fitted to the hub 22 so as to be rotatable about the axis. The shape of the collar 4 is not particularly limited as long as the collar 4 can be fitted to the hub 22 so as to be rotatable around the axis, and examples thereof include a circular or semicircular ring.

A collar 4 is provided between the collar 4 and the hub 22.
It is desirable to provide a means for preventing the collar 4 from coming off the hub 22. One of the contact surfaces between the collar 4 and the hub 22 is provided with a concave portion extending in the circumferential direction, and the other is provided with a convex portion. And a method in which the hub 22 is provided with a projection or the like that sandwiches the collar 4 from the front end direction and the rear end direction. In the latter case, the ribs 23 may also serve as projections that sandwich the collar 4 from the tip direction.

When the protector 3 is at the second position, the projection 31 of the protector 3 and the rib 23 of the hub 22
A rotation preventing means for restricting rotation of the protector 3 with respect to the needle body 2 is constituted. That is, when the protector 3 is in the first position, the protector 3 can be axially rotated by the collar 4 about the position where the blade surface 24 of the needle tip 21 faces, but in the second position, the protrusion 31 The shaft rotation is restricted by being locked by the rib 23.

The structure of the rotating shaft portion 5 is not particularly limited, and one of them is fitted to the other and fixed with a pin as shown in the figure, or the protector 3 and the collar 4 are integrally formed of a flexible material. Things.

A lock portion 33 is provided inside the protector 3, and when the protector 3 is at the second position, the needle body 2 is fixed in the protector 3 as shown in the sectional view (FIG. 3). This prevents the protector 3 from returning to the first position.

In this embodiment, the needle 2 is made of, for example, but not limited to, stainless steel, aluminum or an aluminum alloy, titanium or a titanium alloy. Protector 3, hub 22 and collar 4
The member other than the needle body 2 such as is not particularly limited, for example, polyethylene, polypropylene, polybutadiene,
Polyolefin such as ethylene-vinyl acetate copolymer, polyvinyl chloride, polyurethane, polystyrene, polymethyl methacrylate, polycarbonate, polyamide, polyethylene terephthalate, polyester such as polybutylene terephthalate, acrylic resin, ABS resin, AS
Resin materials such as resin, ionomer, polyacetal, polyphenylene sulfide, and polyetheretherketone are exemplified.

Next, a method of using the puncture device 1 will be described. First, a syringe (not shown) is inserted into the puncture device 1 from the rear end opening of the hub 22. At this time, the puncture device 1 and the syringe are fixed by friction fitting or screw fitting between the inner surface of the hub 22 and the outer surface of the tip of the syringe. And
In a state where the protector 3 is in the first position (the state shown in FIG. 1), the needle body 2 is punctured from the needle tip 21 to the target with the blade surface 24 facing upward. Normally, the protector 3 is positioned in the direction in which the blade surface 24 faces. However, it is necessary to consider the case where the user wants to puncture while checking the direction of the blade surface 24 or the position of a finger for moving the protector 3 to the second position. Then, the protector 3 can be used by rotating the protector 3, that is, tilting the protector 3 left or right.

The protection of the needle body 2 before puncturing can be performed by covering the needle body 2 with the protector 3 in advance and moving the needle body 2 to the first position immediately before use, or separately while the protector 3 is in the first position. Can be performed by covering the needle body 2 with the cylindrical protector and removing it immediately before use.

After puncturing, the protector 3 is moved to the second position, and the needle body 2 is fixed in the protector 3. Thereafter, the puncture device 1 is removed from the syringe with the needle body 2 covered with the protector 3. At this time, the protector 3 is grasped and removed while twisting at least one of the puncture device 1 and the syringe. As shown in FIGS. 4 and 5, the protrusion 31 of the protector 3 is locked by the rib 23 of the hub 22, and Is restricted, the torque generated by twisting is sufficiently transmitted to the puncture device 1 and the syringe, and the puncture device 1 can be reliably removed from the syringe.

[0022]

According to the present invention, there is provided a puncture device with a protector which has a relatively simple structure in which a protector for covering the needle body is provided on the hub by rotating the needle toward the needle body and which can cover the needle tip reliably. It is possible to provide a puncture device that can be easily removed from a medical device such as a syringe while the needle body is covered with a protector after use, while maintaining improved operability at the time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a use form of a puncture device according to the present invention.

FIG. 2 is a perspective view showing a use form of the puncture device according to the present invention.

FIG. 3 is a sectional view of the protector 3 in the state shown in FIG. 2;

FIG. 4 is a sectional view showing a use form of the puncture device according to the present invention.

FIG. 5 is a sectional view showing a use form of the puncture device according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Puncture tool 2 Needle 21 Needle tip 22 Hub 23 Rib 24 Blade surface 3 Protector 31 Projection part 32 Slit 33 Lock part 4 Collar 5 Rotation shaft part

Claims (4)

[Claims] 1. A needle body having a sharp needle tip, a hub provided at a base end of the needle body, a first position separated from the needle body, and a first cover covering at least the needle tip of the needle body. A puncture device having a protector provided on the hub so as to be rotatable between two positions, wherein when the protector is at the second position, the protector rotates axially with respect to the needle body. A puncture device comprising a rotation preventing means for regulating. 2. When the protector is at the first position, the protector is rotatable with respect to the needle body. When at the second position, the protector restricts the shaft rotation. The puncture device according to claim 1, wherein the puncture device is a puncture device. 3. The hub is provided with the protector by fitting a collar connected to a base end of the protector into the hub.
The puncture device according to 1. 4. The puncture device according to claim 1, wherein said rotation preventing means comprises an uneven portion provided on at least one of a base end of said protector and said hub.