JP2003220142A - Syringe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To completely and surely cover the needle of a used syringe with a cover. <P>SOLUTION: This syringe is equipped with an external cylinder 1 on the distal end of which, a needle 2 is fitted, and a plunger 3 which forms a filling space for a medicine in the external cylinder 1, and discharges the medicine from the distal end by sliding. In such a syringe, the sliding type cover 4 which is superposed on the surface of the external cylinder 1, and exposes the needle 2 by a movement toward the rear end of the external cylinder, and covers at least the distal end region of the needle 2 by a movement toward the tip of the external cylinder is provided on the external cylinder. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe, and an object thereof is to handle the syringe more safely.

[0002]

2. Description of the Related Art Syringes used in the medical field are used before use from the viewpoint of ensuring safety during handling.
A protective cover is attached to the used syringe to cover the needle.

By the way, the conventional protective cover is a cap type that can be attached to and detached from a syringe, and there is a risk that the needle tip may accidentally scratch a hand or a finger when it is attached at the time of disposal. The work of mounting the cover itself is troublesome, and the burden on the worker (particularly mental burden) is great, and improvement thereof is required.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to propose a novel syringe which can safely and surely cover the needle not only before use but also after use.

[0005]

SUMMARY OF THE INVENTION According to the present invention, there is provided an outer cylinder having a needle attached to the tip thereof, a space for filling the liquid medicine in the outer cylinder, and a sliding means for discharging the liquid medicine from the tip of the needle. A syringe cover having a jar, the slide cover covering the surface of the outer cylinder to expose the needle by moving toward the rear end of the outer cylinder and covering at least the tip region of the needle by moving toward the tip. A syringe characterized by comprising:

[0006] In the above syringe, it is preferable to provide an engaging means for positioning the slide cover with respect to the outer cylinder between the slide cover and the outer cylinder.

Further, the slide cover may be provided with a needle cover for covering the entire area of the needle.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described more specifically with reference to the drawings.

FIG. 1 shows a first embodiment of the present invention (when a syringe is used), in which 1 is an outer cylinder,
Reference numeral 2 is a hypodermic needle shown as an example of being fixedly held at the tip of the outer cylinder 1.

Reference numeral 3 denotes a plunger slidable in the outer cylinder 1. The plunger 3 forms a filling space for the chemical liquid in the outer cylinder 1, and the plunger 2 slides the chemical liquid by pressing the space. It can be discharged from the tip of.

Reference numeral 4 is a slide cover slidably fitted on the outer cylinder 1. This slide cover 4 is shown in FIG.
As shown in Fig. 2, the needle 2 is exposed at the most rear end of the outer cylinder 1 (before and during use of the syringe), but as shown in Fig. 2,
By moving the slide cover 4 toward the tip of the outer cylinder 1, at least the tip region of the needle 2 is covered (after use).

Numeral 5 is an engaging means for positioning the slide cover 4 with respect to the outer cylinder 1, and this engaging means 5
Is composed of an elastic tongue 5a which is integrated with the slide cover 4 and has a claw at its tip and an annular recess 5b provided around the neck of the outer cylinder 1. The slide cover 4 is moved toward the tip of the outer cylinder 1 to cover the needle 2 with the slide cover 4, and at the same time, the claw of the elastic tongue 5a engages with the annular recess 5b. There is no deviation.

Reference numeral 6 in FIG. 1 denotes a needle cover that covers the entire area of the needle 2 before using the syringe. As shown in FIG. 3, the needle cover 6 is mounted on the lock tip t of the needle 2 and the base portion 6a thereof is attached to the slide cover 4.
It can be fixedly held by fitting it to the annular ring 4a, and can be removed by pulling out the needle cover 6 from the annular ring 4a when the syringe is used. You can't do it.

In the syringe shown in FIG. 1 above, the needle 2 can be surely covered only by moving the slide cover 4 to the tip of the outer cylinder 1 after use, so that a syringe of a type in which a cap-type cover is mounted is attached. There is no danger of concern in.

Further, by making the needle cover 6 so that it cannot be reset after being removed, it becomes possible to prevent reuse of the syringe.

The needle cover 6 may be of a virgin type, which is formed integrally with the slide cover 4 in advance as shown in FIGS. 4 (a) and 4 (b) and is torn off when the syringe is used. it can.

The syringe according to the present invention can be basically made of synthetic resin except for the needle 2, but the needle cover 6 is made of metal (stainless steel) when the structure shown in FIG. 3 is applied. Etc.).

5 (a) and 5 (b) show a second embodiment of the syringe according to the present invention.

As shown in FIG. 6, the syringe shown in FIG. 5 is provided with annular recesses 5c and 5d at two positions on the body of the outer cylinder 1 at intervals and on the inner wall surface of the slide cover 4. A convex portion 4b that fits the annular concave portions 5c and 5d is provided. When the syringe is used, the convex portion 4b of the slide cover 4 is fitted to the annular concave portion 5c of the outer cylinder 1, and after use, fitted to the annular concave portion 5d. Positioning with respect to the outer cylinder 1.

In FIG. 7, a convex portion 5e is integrally provided at a position opposite to the outer cylinder 1, and the claw of the elastic tongue 5a of the slide cover 4 is engaged with the convex portion 5e so that the slide cover 4 is fixedly held. An embodiment is shown in the third embodiment of the present invention in which the needle 2 is covered.

FIGS. 8 (a) and 8 (b) show the state of the syringe shown in FIG. 7 before use and after use (at the time of disposal). The syringe illustrated here is a convex portion provided on the outer cylinder 1. There is an advantage that 5e functions as a guide for guiding the cover 4 when the slide cover 4 moves, and prevents the cover 4 from rotating around the outer cylinder 1.

[0022]

According to the present invention, the needle can be covered by simply moving the slide cover toward the distal end of the outer cylinder, so that the needle tip touches the hand or finger after use (disposal) of the syringe. There is no risk of scratching.

Further, according to the present invention, since the cover is provided on the outer cylinder, the mounting work of the cover can be started immediately after use, so that the troublesomeness of the mounting work can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a first exemplary embodiment of the present invention.

FIG. 2 is a view showing a usage state of the syringe shown in FIG.

FIG. 3 is a view showing an assembled state of the syringe shown in FIG.

4A and 4B are views showing another example of the needle cover.

5 (a) and 5 (b) are views showing a second embodiment of the present invention.

FIG. 6 is a view showing a cross section of the syringe shown in FIG.

FIG. 7 is a diagram showing a third exemplary embodiment of the present invention.

8 (a) and (b) are views showing a state before and after use (at the time of disposal) of the syringe shown in FIG.

[Explanation of symbols]

1 outer cylinder 2 needles 3 Plunger 4 slide cover 4a annular ring 4b convex part 5 Engaging means 5a elastic tongue 5b annular recess 5c annular recess 5d annular recess 5e convex part 6 needle cover M filling space

Claims (3)

[Claims] 1. A syringe comprising an outer cylinder having a needle attached to the tip thereof, and a plunger for forming a filling space for the liquid medicine in the outer cylinder and sliding the liquid to discharge the liquid medicine from the tip of the needle. A syringe provided with the outer cylinder, the slide cover covering the surface of the outer cylinder to expose the needle by a movement toward the rear end of the outer cylinder and cover at least the tip end region of the needle by a movement toward the tip thereof. . 2. The syringe according to claim 1, further comprising an engagement means provided between the slide cover and the outer cylinder for positioning the slide cover with respect to the outer cylinder. 3. The syringe according to claim 1, wherein the slide cover includes a needle cover that covers the needle over the entire area thereof.