JP2003220139A - Syringe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To safely and surely cover the needle of a used syringe with a protective cover. <P>SOLUTION: This syringe is equipped with an external cylinder on the distal end of which, a needle is fitted, and a plunger which forms a filling space for a medicine in the external cylinder and discharges the medicine from the distal end of the needle by sliding. In such a syringe, the protective cover which is rockably held through a hinge and covers at least the needle tip under a standing posture when being pulled up, and stops falling down in the opposite direction 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 A syringe used in the medical field is provided with a protective cover for covering the injection needle in order to ensure safety in handling (especially when discarding) the syringe.

By the way, the conventional protective cover is a cap type which can be attached to and detached from a syringe, and there is a possibility that the needle tip may accidentally scratch a hand or a finger when the cap is attached. Since the work of mounting the device itself is troublesome and the burden on the worker (particularly mental burden) is large, improvement thereof is required.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to propose a novel syringe in which a used protective syringe can be safely and reliably attached with a protective cover.

[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 equipped with a jar, which is swingably held by the outer cylinder via a hinge and covers at least the needle tip in an upright posture by pulling it up to prevent it from falling in the opposite direction. A syringe having a protective cover.

In the syringe having the above construction, the protective cover may be provided with a lock mechanism that engages with the outer cylinder to maintain the standing posture and the inverted posture of the protective cover.

Further, the protective cover can be provided with a support portion which engages with the needle in its standing posture to hold the needle, and also engages with the outer cylinder to prevent swinging during use of the syringe. A stopper can be provided to prevent this.

Further, the protective cover forms a pair of cover main body portions, which are opposed to each other with the body portion of the outer cylinder interposed therebetween, and finger flanges of the syringe formed at the respective tips of the cover main body portions, and in the standing posture, they are mutually opposed. And a pair of fins that engage with the cover body and form a protective space together with the cover body.

[0009]

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 M for the chemical liquid in the outer cylinder 1 and the plunger 3 slides by pressing the liquid to make a needle. Two
It can be discharged from the tip of.

Reference numeral 4 denotes a protective cover which is swingably held by a locking tip c fitted in the outer cylinder 1 via a hinge h. As shown in FIG. 2 (before the use of the syringe), the protective cover 4 can cover at least the tip of the needle 2 in a standing posture.

Further, in FIG. 1, reference numeral 5 denotes a lock mechanism which is shown as an example of an opening provided integrally with the protective cover 4,
Reference numeral 6 in FIG. 3 denotes a lock mechanism that shows an opening provided on the back surface of the protective cover 4 as an example. The lock mechanism 5 is the outer cylinder 1.
4 and the locking mechanism 6 is fitted to the convex portion 1a provided on the outer cylinder 1 to firmly maintain the standing posture as shown in FIG. 4 (after the use of the syringe). Firmly maintain the inverted posture as shown in 1.

The syringe shown in FIG. 1 above can surely cover the needle 2 only by raising the protective cover 4 after use and fitting the opening of the lock mechanism 5 into the convex portion 1b of the outer cylinder 1. Therefore, there is no danger at all in a syringe with a cap-type cover attached.

The lock mechanism 5 has been described by taking an opening fitted into the convex portion 1a as an example, but a pawl as shown in FIG. 5 may be engaged with the pawl 1a of the outer cylinder 1. Also,
Although the lock mechanism 6 has a rectangular opening as an example, as shown in FIG. 6, a circular (or an elliptic long hole) opening may be provided on the rear surface of the protective cover 4 to be provided on the outer cylinder 1. It may be fitted into the circular convex portion 1b.

7 to 9 show a second embodiment of the syringe according to the present invention. FIG. 7 shows a set state before use, FIG. 8 shows a state during use, and FIG. Is the state after use.

In the figure, 7 is a virgin type cap, and 8 is a sandwiching type support portion shown as an example formed integrally inside the protective cover 4.

The syringe of such a construction is equipped with a cap 7 in a set state as shown in FIG. 7, and the cap 7 ensures safety before use and hygiene of the needle 2.

To use the syringe, the cap 7 need only be cut off as shown in FIG.
As shown in Fig. 5, the protective cover 4 is raised to lock the lock mechanism 5
The needle 2 by simply fitting the protrusion 5a of the needle into the opening 1c of the outer cylinder 1.
Can be reliably covered. In this embodiment, the convex portion 5
One side of the end surface a is tapered, so that the protrusion 5a can be easily inserted into the opening 1c.

Since the support portion 8 is provided inside the protective cover 4 in this syringe, the needle 2 is clamped by the support portion 8 when the protective cover 4 is raised.

10 to 13 show a third embodiment of the syringe according to the present invention. FIG. 10 shows a state before use, FIG. 11 shows a state after use, and FIG.
2 and 13 are cross-sectional views of FIGS. 10 and 11, respectively.

In FIGS. 10 to 13, 9 is a protective cover 4.
Is a stopper that is integrally provided with the lock tip c and engages with the lock tip c to prevent the protective cover 4 from swinging when the syringe is used. This stopper 9 comprises an elastic tongue 9a having a hooking claw.

With respect to the syringe shown in FIGS. 10 to 13 above, the needle 2 can be surely covered up only by raising the protective cover 4 starting from the hinge h after use, and the hand or finger is injured by the needle tip. There is nothing to do.

In this type of syringe, the base is clamped by the support portion 8 when the protective cover 4 is pulled up, so the standing posture of the protective cover 4 is reliably maintained.

14 to 17 show a fourth embodiment of the syringe according to the present invention. 14 is an external perspective view of the syringe after use, FIG. 15 is a sectional view before use, FIG. 16 is a sectional view after use, and FIG. 17 is an enlarged view of a main part.

Reference numeral 9 in the drawing denotes a stopper which is integrated with the protective cover 4 and engages with the outer cylinder 1 when the syringe is used to prevent the cover 4 from swinging. The support part 8 can be configured in a plan view as shown in FIG. 17, whereby the protective cover 4 is pulled up so that the tip of the needle 2 does not come out once it has entered the inside of the support part 8. Is possible and the safety is significantly improved. Further, in the present embodiment, the protective cover 4 is provided with the side wall portion which is continuous with the side wall of the support portion 8. However, the configuration in which the side wall portion is deleted can be appropriately selected.

In the syringe having the structure shown in FIG. 1 above, the stopper 9 may be provided in place of the lock mechanism 6 as shown in FIG.

FIG. 19 shows a fifth embodiment of the syringe according to the present invention. This syringe has a protective cover 4
Is composed of cover body portions 4a and 4b arranged opposite to each other with the body portion of the outer cylinder 1 interposed therebetween.
At the tip of 4b, there is a fin f having a concave portion and a convex portion integrally formed with it.

The fins f at the tips of the cover body portions 4a and 4b function as finger flanges of the syringe, and after use of the syringe, the cover body portions 4a and 4b are started from the hinges h as shown in FIG. Then, the convex portion of the fin f is engaged with the concave portion to form a protective space for covering the needle 2.

The syringe as shown in FIG. 19 can be set as shown in FIG. 20 before use, that is, in a set state, which not only ensures safety but also hygiene of the needle. You can also keep it.

FIG. 21 shows the arrangement of the protective cover 4 during use (two-dot chain line) and after use.

[0032]

According to the present invention, the needle can be hidden by merely raising the protective cover, so there is no risk of the needle tip touching a hand or a finger and damaging it.

Further, according to the present invention, since the outer cylinder is provided with the protective cover, the troublesome work of mounting the cover can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a syringe according to the present invention.

FIG. 2 is a diagram showing a state before using the syringe shown in FIG.

FIG. 3 is a diagram showing a back main part of the syringe shown in FIG.

FIG. 4 is a view showing a state after using the syringe shown in FIG.

5 is a view showing a modified example of the syringe shown in FIG.

FIG. 6 is a view showing a modified example of the syringe shown in FIG.

FIG. 7 shows a second embodiment of the syringe according to the present invention.

FIG. 8 is a view showing a state when the syringe shown in FIG. 7 is used.

9 is a view showing a state after using the syringe shown in FIG. 7. FIG.

FIG. 10 shows a third embodiment of the syringe according to the present invention.

FIG. 11 is a view showing a state after using the syringe shown in FIG.

FIG. 12 is a view showing a cross section of the syringe shown in FIG. 10 when it is used.

13 is a diagram showing a cross section after the use of the syringe shown in FIG.

FIG. 14 is a diagram showing a fourth embodiment of the syringe according to the present invention.

FIG. 15 is a view showing a cross section of the injector shown in FIG. 14 before use.

16 is a view showing a cross section after the use of the syringe shown in FIG.

FIG. 17 is a diagram showing a main part of the syringe shown in FIG.

FIG. 18 is a view showing a modified example of the syringe according to the present invention.

FIG. 19 shows a fifth embodiment of the syringe according to the present invention.

FIG. 20: After use (before use) of the syringe shown in FIG.
It is a figure showing the state of.

FIG. 21 is a diagram showing a state of using the syringe shown in FIG. 19 and a state before and after use.

[Explanation of symbols]

1 Outer cylinder (syringe) 1a convex part 1b convex part 1c opening 2 needles 3 Plunger 4 protective cover 4a Cover body part 4b cover body 5 Lock mechanism 5a convex part 6 Lock mechanism 7 cap 8 Support Department 9 stopper 9a elastic tongue M filling space c Locking tip h hinge f fin

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Kazuhito Kuwahara             Stock exchange, 3-2-6 Oshima, Koto-ku, Tokyo             Inside the company Yoshino Industry (72) Inventor Nobuo Yamanaka             Stock exchange, 3-2-6 Oshima, Koto-ku, Tokyo             Inside the company Yoshino Industry F-term (reference) 4C066 AA09 BB01 CC01 DD08 EE14                       FF03 FF05 NN02 NN07 NN09

Claims (5)

[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 protective cover is provided on the outer cylinder so as to be swingable via a hinge, and at least protects the needle tip in a standing posture by pulling up the outer cylinder so as not to fall in the opposite direction. Syringe. 2. The syringe according to claim 1, wherein the protective cover has a lock mechanism that engages with the outer cylinder to maintain the standing posture and the inverted posture of the protective cover. 3. The syringe according to claim 1, wherein the protective cover has a support portion that engages with the main body of the needle in its standing posture to hold the needle. 4. The syringe according to any one of claims 1 to 3, wherein the protective cover has a stopper that engages with the outer cylinder and prevents the syringe from rocking when the syringe is in use. 5. The protective cover has a pair of cover main body portions that are arranged to face each other with the body portion of the outer cylinder interposed therebetween, and finger flanges of the syringe are formed at the respective tips of the cover main body portions. The syringe according to any one of claims 1 to 4, comprising a pair of fins that engage with each other and form a protective space together with the cover body portion.