JP2003235972A - Syringe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To securely house a syringe needle with a safe and simple operation thereof. <P>SOLUTION: A syringe has a syringe part for holding the syringe needle through a lock chip and a plunger forming a space to be filled with a medicine between the syringe part and the plunger and for discharging the medicine from a tip of the syringe needle by sliding. A rotor, to which the lock chip is screwed for supporting the inside of a through passage communicating with the space to be filled with the medicine and which is freely rotatably held in a tip of the syringe part, is fitted to the syringe part, and the plunger is provided with a cover body to be screwed to the through passage when exchanging it with the lock chip. <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 before and after use (at the time of disposal) from the viewpoint of ensuring safety in handling the syringe.

By the way, since the conventional protective cover is a cap type that can be attached to and detached from the syringe, there is a possibility that the needle tip may accidentally scratch the hand or finger when the protective cover is attached (especially used). When the protective cover is attached to the syringe and discarded, and the work of mounting the protective cover itself is troublesome, the burden on the worker (particularly mental burden) is great, and its improvement is required.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to propose a novel syringe which can safely and reliably cover up a needle after use.

[0005]

According to the present invention, a syringe for holding an injection needle via a locking tip and a filling space for the liquid medicine are formed between the syringe and the liquid medicine is injected by sliding the space. A syringe equipped with a plunger that discharges from the tip of a needle, wherein the syringe has a lock tip supported by screwing in a through passage that leads to a space filled with a drug solution, and is rotatably held at the tip of the syringe. The syringe is characterized in that a rotating body is attached to the plunger, and a lid that is screwed to the through passage by replacing the plunger with the locking tip is arranged on the plunger.

In the syringe having the above construction, the locking tip is particularly advantageously adapted to be slid along the axis of the syringe by the rotation of the rotating body so as to be dropped into the filling space together with the injection needle.

[0007]

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

1 (a) and 1 (b) show an embodiment of a syringe according to the present invention, in which FIG.
(B) is an enlarged view of the main part.

In the figure, reference numeral 1 is an injection needle, 2 is an injection needle 1.
Is a lock tip for holding the lock tip, and a threaded portion 2a is provided on the outer surface of the lock tip 2.

The number 3 is a syringe which constitutes the main body of the syringe, and 4
Is a plunger that forms a filling space M for the drug solution with the syringe 3 and discharges the drug solution from the tip of the injection needle 1 by sliding in the syringe 3.

Reference numeral 5 denotes a rotating body rotatably held at the tip of the syringe 3. This rotating body 5 has a filling space M
It has a through passage 5a that communicates with the inside thereof, and a threaded portion r is formed on the side wall surface of the through passage 5a.

Reference numeral 6 denotes a lid body fixedly held on the pressing end surface of the plunger 4 by an engaging means such as a screw.
Can be engaged with a screw portion r provided on the side wall surface of the through passage 5a. Further, 7 is a seal member disposed between the flange portion of the locking tip 2 and the top wall 3a of the syringe 3, and 8 is a convex portion that supports and positions the locking tip 2 inside the syringe 3. is there.

The screw portion 2a of the lock tip 2 is a rotating body 5.
Since it is engaged with and screwed to the screw part r provided in the through passage 5a of the above, and is sealed by the seal member 7 between them, by using the syringe in the state shown in FIG. The drug solution is reliably discharged from the injection needle 1.

After using the syringe (at the time of disposal), the plunger 4 is pulled back to form a space in the syringe 3, and when the rotating body 5 is rotated, the locking tip 2 gets over the convex portion 8 and is injected. The needle 1 slides along the axis of the syringe 3. When the threaded portion 2a of the locking tip 2 and the threaded portion r of the through passage 5a are disengaged, the locking tip 2 enters the space (filling space) of the syringe 3 together with the injection needle 1 as shown in FIG. The storage of the injection needle 1 is completed by dropping the lid body 6 fixedly held on the pressing end surface of the plunger 4 and screwing the lid body 6 into the through passage 5a of the rotating body 5 as shown in FIG.

As described above, in the syringe according to the present invention, the injection needle 1 can be dropped into the syringe 3 simply by rotating the rotating body 5, and the through-passage 5a can be securely held by the lid 6 provided separately. Since it can be closed, the injection needle 1 does not pop out through the through passage 5a after use.

When the rotating body 5 is rotated, the locking tip 2 may be rotated together with the rotating body 5, but in such a case, a vertical rib is provided in advance inside the syringe 3 and the vertical rib is provided. Is adapted to a part (flange portion etc.) of the locking tip 2 to avoid circling.

In separating the injection needle 1 from other constituent members, the injection needle can be taken out only by pulling out the plunger 4 from the syringe 3, so that the separate collection can be performed very easily.

FIG. 4 shows another structural example of the syringe according to the present invention with respect to its main part (open end of the syringe 3). The syringe shown here has a structure in which a ring 9 fixed and held by an engaging means such as an undercut is provided inside the opening end of the syringe 3 (other configurations are the same as those shown in FIG. 1). Yes, this allows the syringe needle 1 to be placed in the syringe 3.
The plunger 4 is prevented from coming out of the syringe 3 when the plunger 4 is pulled back to form the storage space.

Although the ring 9 is shown as an example in which it is fixedly held by an undercut in FIG. 4, the engaging means may be a screw or an adhesive, and is not particularly limited in the present invention. When discarding this type of syringe, the syringe needle 1 is stored in the syringe, and then the syringe 3 is discarded while the plunger 4 is still inserted.

[0020]

According to the present invention, since the injection needle can be housed in the syringe by simply rotating the rotating body, the needle tip may touch the hand or finger after use of the syringe (at the time of disposal) to cause scratches. There is no danger of it getting stuck, and the work of storing the injection needle can be performed very easily.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a state where the injection needle of the injector shown in FIG. 1 is dropped into a syringe.

FIG. 3 is a view showing a state where a lid is attached to the syringe shown in FIG.

FIG. 4 is a view showing another configuration of the syringe according to the present invention with respect to its main part.

[Explanation of symbols]

1 injection needle 2 Lock tip 2a screw part 3 syringes 3a Top wall 4 Plunger 5 rotating body 5a through passage 6 lid 7 Seal member 8 convex 9 ring r Threaded part M filling space

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Claims (2)

[Claims] 1. A syringe that holds an injection needle via a locking tip, and a plunger for discharging a drug solution from the tip of the injection needle by forming a space for filling the drug solution between the syringe and the syringe. A syringe provided with, wherein the syringe is attached with a rotating body that is screwed and supported in a through path that leads to a drug solution filling space and is rotatably held at the tip of the syringe, A syringe characterized in that a lid body, which is screwed to the through passage when the locking tip is replaced, is arranged in the jar. 2. The syringe according to claim 1, wherein the lock tip slides along the axis of the syringe by the rotation of the rotating body and is dropped into the filling space together with the injection needle.