JP3123296B2 - Syringe assembly - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe assembly with puncture prevention means, and more particularly to a so-called puncture accident in which a finger or the like is erroneously pierced with a syringe needle when the syringe needle is removed from the syringe. And a syringe assembly provided with means for performing the following.

[0002]

2. Description of the Related Art In the medical field, medical needles for injecting a drug solution or blood, such as injection needles, infusions, and venous indwelling needles for transfusion, are generally disposable. Since it is dangerous to discard the needle with the blade edge exposed without any care, the protector, which was conventionally mounted to protect the blade edge, is mounted on the medical needle again after use and disposed. However, since the opening of the protector has a relatively small diameter, when the protector is attached to the injection needle after use of the injection needle, a medical worker may accidentally stab a finger with the injection needle. Such an accidental puncture may not only result in physical pain for the medical staff. That is, there is a possibility that a pathogen such as a bacterium or a virus possessed by the patient may be attached to the used medical needle after penetrating the patient's body. There is a danger that healthy healthcare workers will become infected with the disease.

Therefore, various proposals have been made in the past to prevent such erroneous puncture accidents (Japanese Utility Model Application Laid-Open No.
-55448, Japanese Utility Model Unexamined Publication No. 61-85239,
JP-A-4-58256, JP-A-4-244167
JP, JP-T3-504808, JP-A-2-1
288, JP-A-4-90766 and JP-A-6-90766
JP-A-2-144666, JP-A-63-317160, JP-A-64-86981, etc.). Showa 6
Japanese Unexamined Patent Publication No. 0-55448 and Japanese Unexamined Utility Model Publication No. Sho 61-85239 show a mouth deformable protector in which the mouth of the protector is enlarged to have a trumpet shape or a flange provided near the mouth. One that has a slit in the longitudinal direction at the mouth is disclosed. In addition, 4-5825
No. 6 and JP-A-4-244167 are specially shaped protectors having a bellows-like extending portion, which can be extended toward the distal end to cover the entire injection needle. And a housing having a base and a compressible section that is flexibly connected to the base, wherein the cutting edge of the injection needle housed in the housing is inserted into the contracted compressible section. It has been disclosed.

On the other hand, Japanese Unexamined Patent Publication No. Hei 3-504808, Japanese Unexamined Patent Publication No. Hei2-1288 and Japanese Unexamined Patent Publication No. Hei4-90766 are syringe needle retractable type syringes. There is disclosed one that is hooked on a plunger and drawn into an outer cylinder. Also,
JP-A-62-144666, JP-A-63-317
No. 160 and JP-A-64-86981 are syringes of a protective body slide type, in which an outer cylinder of the syringe is covered with a cylindrical protective body which can move forward and backward in a longitudinal direction, and the protective body is connected to an outer cylinder of the syringe. That can cover the entire injection needle by sliding in the longitudinal direction along the line.

[0005]

Although these are certainly effective as means for solving the above problems, the following drawbacks are a concern. In other words, the one using the mouth deforming protector leaves the possibility of puncture due to the need to reinsert the protector, and the one using the specially shaped protector is expensive due to its complicated structure. In addition, questions remain regarding operability. In addition, in the case of the injection needle retraction type, not only the syringe itself must have a complicated structure, but also the operation for retracting the injection needle may be complicated. Furthermore, since the tip of the type in which the protective body slides is open, the body fluid attached to the injection needle may leak out of the protector. Improving and providing a lid to prevent leakage of bodily fluids and providing a locking mechanism for the purpose of preventing reuse complicates the structure and operability of the syringe, so it is not necessarily preferable. I can't say. The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inexpensive syringe assembly that can reliably prevent an accidental puncture accident, has a simple structure, is easy to operate, and is inexpensive. .

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a syringe assembly comprising a syringe and a needle protector which is slidably attached to an outer cylinder of the syringe in a longitudinal direction so as not to fall off. Wherein the injection needle protector is
A cylindrical attachment portion nested in the outer cylinder, and a beak-shaped protection portion extending from the attachment portion toward the distal end of the syringe, and the protection portion attaches the injection needle protector to the outer cylinder. A syringe assembly that is open at the attached position and that can be closed when the syringe needle protector is slid to the slide stop position at the tip of the syringe is employed.

[0007]

According to the above arrangement, after the syringe is used, the syringe needle protector is slid in the longitudinal direction along the outer cylinder of the syringe to stop the slide position (the position where the syringe needle attached to the tip of the syringe can be covered). ). At this position, when the upper and lower beaks constituting the protection part of the injection needle protection body are closed, the injection needle is covered in the protection part of the injection needle protection body. At this time, since the protection part is closed, the body fluid attached to the injection needle does not leak out.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of a syringe assembly showing one embodiment of the present invention (a syringe needle is mounted on a tip at the tip), and FIG. 2 shows a syringe assembly shown in FIG. FIG. 3 is a view showing a state in which the protection portion is closed in FIG. 2, and FIG. 4 is a view showing a cross section of the injection needle protector portion in FIG. FIGS. 5 to 7 are plan views showing another embodiment of the injection needle protector, and FIG. 8 is an explanatory diagram of components of the injection needle protector.

As shown in FIGS. 1 to 4, the syringe assembly of the present invention comprises a combination of a syringe 1 and a needle protector 2,
The injection needle protector 2 is attached to the outer cylinder 11 of the syringe 1 so as to be slidable in the longitudinal direction and not to fall off the outer cylinder 11. The injection needle protector 2 includes a tubular mounting portion 21 nested on the outer cylinder 11 and a beak-shaped protecting portion 22 extending from the mounting portion 21 toward the distal end of the syringe 1. Is opened at a position where it is attached to the outer cylinder 11, and can be closed when the injection needle protector 2 is slid to the slide stop position at the tip of the syringe 1.

The syringe 1 has an outer cylinder 11 similar to a normal syringe.
The distal end of the syringe 1 has a plunger 12, and the shoulder of the outer cylinder 11 of the syringe 1 is provided with a locking projection 14 as a means for stopping the sliding of the syringe needle protector 2 toward the tip of the syringe. The locking projection 14 is engaged with an engaging step 23 provided on a mounting portion 21 of the injection needle protection body 2 described later to prevent the injection needle protection body 2 from dropping out of the outer cylinder 11. The position at which the injection needle protector 2 stops sliding in the direction of the distal end of the syringe is the injection position attached to the tip 13 of the distal end of the outer cylinder 11 when the protection part 22 of the injection needle protector 2 is closed at this position. It is also the position where the needle 3 is covered. The outer cylinder 11 of the syringe 1 is provided with a projection 15 on the rear end side of the flange 16 side, and the engagement slit 2 provided on the rear end of the injection needle protector 2.
5, the injection needle protection body 2 may be prevented from inadvertently sliding. The means for stopping the slide of the syringe needle protector 2 in the distal direction of the syringe is not limited to the combination of the locking projection 14 and the engaging step 23, and various methods are possible. The locking projections 14 are not limited, but are usually formed in a ring or as a pair as shown in FIG. The means for preventing the syringe needle protector 2 from sliding carelessly is not limited to the combination of the projection 15 and the engagement slit 25.

The injection needle protector 2 comprises a cylindrical mounting portion 21 and a beak-shaped protection portion 22. The mounting portion 21 is nested on the outer cylinder 11 of the syringe 1 at the mounting portion 21. The front end of the mounting portion 21, that is, the end portion on the side of the protection portion 22, is formed in an engagement step 23 with an inner wall cut out in an annular shape. As a result, the syringe needle protector 2 is prevented from falling off the outer cylinder 11. At the rear end of the mounting portion 21, the engaging slit 2 corresponding to the projection 15 of the outer cylinder 11 is provided.
5 may be provided to prevent the injection needle protector 2 from sliding carelessly. The protection part 22 is composed of a pair of beak pieces 221 and 222 connected by the attachment part 21 and the connection part 26. When the syringe needle protector 2 is attached to the outer cylinder 11 of the syringe, the bird is just beaked. It looks like it is open. As shown in FIGS. 1 to 4, the connecting portion 26 is connected to the upper and lower beak pieces 22.
1 and 222, the adjacent beak pieces 221 and 222 and the ends of the mounting portion 21 may be in contact with each other when the injection needle protector 2 is mounted on the outer cylinder 11.
As shown in FIG.
Beak pieces 221 and 2 adjacent to each other when the
The end portions of the mounting portion 21 and the mounting portion 21 may be separated from each other.

The protection part 22 of the injection needle protection body 2 is usually provided with a self-closing property. That is, it is formed so as to be closed without being attached to the outer cylinder 11 of the syringe 1. For example, in the case of the injection needle protector 2 shown in FIGS. 1 to 4, first, a pair of injection needle protector parts in which the connecting portions 26 are hinged as shown in FIG. 8 are formed, and the upper and lower beak pieces 221 and 222 are formed.
Are respectively bent in the direction of arrow a around the connection portion 26,
The sides 27 are adhered to each other. Therefore, when the injection needle protector 2 is attached to the outer cylinder 11, the restoring force of the hinge acts in the direction of arrow b, so that the protection portion 22 of the injection needle protector 2 is formed.
When the portion is moved to a position outside the outer cylinder 11, the protection portion 22 is moved.
Is closed. Injection needle protector 2 shown in FIG.
Is also connected by a hinge, and when this is attached to the outer cylinder 11, the beak pieces 221 and 222 are connected to the outer cylinder 1.
Since it is pushed and opened by 1, it has a self-closing property by the restoring force of the hinge. FIG. 6 shows a spring 28 interposed between the mounting portion 21 and the protection portion 22.
Is provided with a self-closing property.

The injection needle protector 2 may be provided with an engagement means 24 at the tip of the protection portion 22 for engaging the upper and lower beak pieces 221 and 222 to prevent the protection portion 22 from being easily opened. Although various methods can be used as the engaging means, those which are easy to engage and cannot be released once engaged are most preferable. The engaging means 24 shown in FIGS. 1 to 4 is a hook means, and a projection is provided at the tip of the lower beak piece 222 in a direction perpendicular to the beak piece 222. Formed). As shown in FIG. 7, the injection needle protector 2 may be provided with a sliding collar 29 at the end of the protection part 22 on the attachment part 21 side. The provision of the collar 29 on the protection portion 22 not only facilitates the sliding of the injection needle protection body 2 but also causes a couple force centering on the connection portion 6 at the slide stop position. Can be closed. In addition, although the mounting part 21 and the protection part 22 are integrally formed through the connection part 26 in the injection needle protection body 2, about the position of the connection part 26 and the connection method,
The present invention is not limited to this, and for example, a hinge may be used for the connection method.

Next, the use of the syringe assembly of the present invention will be described with reference to FIGS. After the use of the syringe assembly, first, the injection needle protection body 2 is rotated in the circumferential direction of the outer cylinder 11 to remove the engagement slit 25 from the projection 15. Next, if the syringe needle protector 2 is manually pushed toward the distal end of the syringe 1, the locking projection 14 of the outer cylinder 11 and the engagement step 23 of the syringe needle protector 2 are engaged at the slide stop position, and The movement of the body 2 toward the distal end of the syringe is stopped. When the protection portion 22 of the injection needle protection body 2 is vertically held and pressed, the upper and lower beak pieces 221 and 2 are pressed.
The closing means 22 is closed, and the engaging means 24 is locked in a state where the injection needle 3 is included inside the protection part 22.

[0015]

As is apparent from the above description, according to the present invention, it is possible to provide an inexpensive syringe assembly which is simpler in structure and easier to operate than conventional ones, However, the used syringe and the used needle can be disposed of without causing an accident such as accidentally damaging a finger or the like with the needle.

[Brief description of the drawings]

FIG. 1 is a plan view of a syringe assembly showing one embodiment of the present invention (a needle at the tip of the syringe is mounted).

FIG. 2 is a view showing a state in which a syringe needle protector is slid to a slide stop position at a distal end in the syringe assembly shown in FIG. 1;

FIG. 3 is a view showing a state where a protection unit is closed in FIG. 2;

FIG. 4 is a view showing a section of the injection needle protection body in FIG. 3;

FIG. 5 is a plan view showing another embodiment of the injection needle protector.

FIG. 6 is a plan view showing still another embodiment of the injection needle protector.

FIG. 7 is a plan view showing still another embodiment of the injection needle protector.

FIG. 8 is an explanatory diagram of components of the injection needle protector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Syringe 11 Outer cylinder 14 Locking projection 15 Projection 2 Injection needle protector 21 Attachment part 22 Protecting part 221 Upper beak piece 222 Lower beak piece 23 Engagement step part 24 Engagement means 25 Engagement slit 28 Spring 29 Flange

Claims (3)

(57) [Claims] 1. A syringe assembly comprising a syringe and an injection needle protector attached to the outer cylinder of the syringe so as to be slidable in a longitudinal direction and non-detachably, wherein the injection needle protector comprises:
A cylindrical attachment portion nested in the outer cylinder, and a beak-shaped protection portion extending from the attachment portion toward the distal end of the syringe, and the protection portion attaches the injection needle protector to the outer cylinder. A syringe set which is open at the attached position and which can be closed when the syringe needle protector is slid to the slide stop position at the tip of the syringe. Three-dimensional. 2. A projection is provided on a proximal end side of an outer cylinder of a syringe, and an L-shaped engagement slit for engaging with the projection is provided at an end of a mounting portion of the syringe protector. A syringe assembly according to claim 1. 3. The syringe assembly according to claim 1, wherein an engagement means for engaging upper and lower beaks constituting the protection portion is provided at a tip of the protection portion of the injection needle assembly.