JP3971933B2 - Syringe - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a syringe and is intended to handle the syringe more safely.
[0002]
[Prior art]
A syringe used in the medical field is provided with a protective cover that covers the syringe needle before and after use from the viewpoint of ensuring safety during handling.
[0003]
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 risk of accidentally damaging the hand or finger with the needle tip when mounting (especially on a used syringe). When the protective cover is discarded, the work of attaching the protective cover itself is troublesome, and the burden on the worker (especially mental burden) is large, so that improvement is required.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to propose a novel syringe capable of covering the needle safely and securely with respect to a syringe after use as well as before use.
[0005]
[Means for Solving the Problems]
The present invention includes an injection needle having a locking tip at the rear end, an outer cylinder that detachably supports the injection needle via the locking chip, and a medicine filling space formed inside the outer cylinder. A syringe provided with a plunger for discharging the liquid medicine from the tip of the injection needle by movement,
A base having a long hole fixedly held by the locking tip and extending along the injection needle; and a protective cover slidably held in the long hole of the base via a pivot shaft;
A through-hole that covers the tip of the base at the rear end of the long hole and exposes the injection needle to the protective cover, and a needle tip of the injection needle by rotation starting from a pivot shaft at the front end of the long hole Forming a compartment recess to house the inside of the cover,
Near the tip of the long hole, it is elastically deformable and passes the pivot shaft when sliding toward the tip of the injection needle of the protective cover, but after the pivot shaft passes, it moves toward the rear end of the slot It is a syringe characterized by arranging a stopper which cannot be made .
[0007]
Further, it is desirable that a convex portion is provided in the cover of the protective cover, and a convex portion that engages with the convex portion in the cover and engages the protective cover with the base is provided at the tip of the base.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described more specifically with reference to the drawings.
[0009]
FIG. 1 is an external perspective view of a syringe according to the present invention, FIG. 2 is a cross-sectional view before using the syringe shown in FIG. 1, and FIG. 3 is a cross-sectional view after using the syringe shown in FIG. Is shown respectively.
[0010]
1-3, 1 is an injection needle, 2 is a locking tip for fixing and holding the injection needle 1 at its rear end, 3 is an outer cylinder for holding the injection needle 1 detachably via the locking tip 2, A plunger 5 for forming a drug solution filling space inside the outer cylinder 3 and discharging the drug solution from the tip of the injection needle 1 by sliding is a base fixedly held by the locking tip 2. The base 5 has a long hole 5 a extending along the injection needle 1.
[0011]
Reference numeral 6 denotes a protective cover that is slidably held in the long hole 5a of the base 5 via the pivot shaft S. The protective cover 6 covers the tip of the base 5 at the rear end of the long hole 5a (corresponding to the lowermost end in FIGS. 2 and 3) and exposes the injection needle 1 and the front end of the long hole 5a. (Corresponding to the uppermost end in FIGS. 2 and 3) is provided with a compartment recess 6 b for accommodating the needle tip of the injection needle 1 inside the cover 6 by rotation starting from the pivot shaft S.
[0012]
7 is a stopper provided in the vicinity of the tip of the long hole 5a that allows the pivot shaft S to pass in only one direction due to its elastic deformation when the protective cover 6 slides. Is a concave portion shown in the annular example provided inside the protective cover 6, and 9 is a convex portion shown in the annular example provided at the tip of the base 5, and this convex portion 9 is the protective cover 6. The protective cover 6 is locked to the base 5 by engaging with a recess 8 provided on the inside of the base 5.
[0013]
The syringe having such a configuration can be used by removing the cap P shown in FIG. 2. At this time, since the protective cover 6 is locked to the base 5 by the convex portion 9, use of the syringe is possible. The protective cover 6 does not slide easily inside.
[0014]
After using the syringe, the protective cover 6 is slid toward the tip of the injection needle 1 and the pivot shaft S passes through the stopper 7 as shown in FIG. The protective cover 6 cannot move toward the lower end of the long hole 5a), and then, as shown in FIG. 5 or 6, the protective cover 6 is rotated with the pivot shaft S as a starting point so that the needle tip of the injection needle 1 is passed through the hole. It can be extracted from 6a and stored in the compartment recess 6b, and the injection needle 1 is covered with the protective cover 6 by a simple procedure.
[0015]
As for the stopper 7, the case where one is provided on the side wall of the long hole 5a is shown in FIG. 1, but this stopper 7 can also be provided in two facing directions as shown in FIGS. Thereby, positioning of the protective cover 6 becomes more reliable.
[0016]
9 (a) and 9 (b) show another configuration example of the syringe according to the present invention. The long hole 5a can be inclined so that the tip thereof is close to the injection needle 1, and according to this, the needle tip is stored in the compartment recess 6b simply by sliding the protective cover 6 after use of the syringe. Thus, there is an advantage that the operation of rotating the protective cover 6 can be omitted.
[0017]
FIG. 10 shows another configuration example of the syringe according to the present invention, and FIG. 11 shows the appearance of the main part.
[0018]
In this example, an inclination 10 for restricting the rotation angle of the protective cover 6 is provided at the upper edge of the frame portion forming the long hole 5a of the base 5, and they are opposed to each other in the vicinity of the inner end of the long hole 5a. The convex part which arrange | positions and this convex part is used as the stopper 7. FIG.
[0019]
When the protective cover 6 is slid, the pivot shaft S forcibly moves over the convex portion of the stopper 7 to position the protective cover 6, and the inner surface of the protective cover 6 is rotated when the protective cover 6 is rotated as shown in FIG. As a result, the protective cover 6 always maintains a constant rotation angle.
[0020]
In this type of syringe, the injection needle 1 is usually made of a metal material such as stainless steel, and the other members are usually made of a synthetic resin. Since the injection needle 1 can be removed together with the locking tip 2, the injection needle 1 and other components can be easily separated.
[0021]
【The invention's effect】
According to the present invention, since the needle can be covered with the cover simply by moving the protective cover toward the tip of the syringe needle, the needle tip touches the hand or finger after use (during disposal). There is no risk of putting on.
[0022]
Further, according to the present invention, it is possible to immediately start the mounting operation of the protective cover after the use of the syringe, and the troublesomeness of the mounting operation can be reduced.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a syringe according to the present invention.
FIG. 2 is a view showing a cross section of the syringe shown in FIG. 1 before use.
FIG. 3 is a view showing a cross section after use (during disposal) of the syringe shown in FIG. 1;
4 is an enlarged view showing a main part of the syringe shown in FIG. 1. FIG.
FIG. 5 is an explanatory diagram of a procedure for storing an injection needle.
FIG. 6 is an explanatory diagram of a procedure for storing an injection needle.
FIG. 7 is a view showing the main part of another configuration example of the syringe according to the present invention.
8 is an external perspective view of FIG. 7. FIG.
9 (a) and 9 (b) are views showing another example of the syringe according to the present invention.
FIG. 10 is a view showing another configuration example of a syringe according to the present invention.
11 is an external perspective view of the main part of FIG. 10;
12 is a view showing a state after use of the syringe shown in FIG. 10;
[Explanation of symbols]
1 Injection needle 2 Tip for locking 3 Outer cylinder (syringe)
4 Plunger 5 Base 5a Long hole 6 Protective cover 6a Through hole 6b Partition recess 7 Stopper 8 Recess 9 Protrusion 10 Inclination S Pivot shaft

Claims (2)

An injection needle having a locking tip at the rear end, an outer cylinder that detachably supports the injection needle via the locking chip, and a space for filling a chemical solution is formed inside the outer cylinder. A syringe equipped with a plunger for discharging the drug solution from the tip of the injection needle;
A base having a long hole fixedly held by the locking tip and extending along the injection needle; and a protective cover slidably held in the long hole of the base via a pivot shaft;
A through-hole that covers the tip of the base at the rear end of the long hole and exposes the injection needle to the protective cover, and a needle tip of the injection needle by rotation starting from a pivot shaft at the front end of the long hole Forming a compartment recess to store
Near the tip of the long hole, it is elastically deformable and passes the pivot shaft when sliding toward the tip of the injection needle of the protective cover, but after the pivot shaft passes, it moves toward the rear end of the slot A syringe comprising a stopper that cannot be moved .   The syringe according to claim 1, further comprising: a concave portion in the cover of the protective cover; and a convex portion that engages with the concave portion in the cover and engages the protective cover with the base at a tip portion of the base.

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