JPH119691A - Injector used as container in common - Google Patents

Abstract

PROBLEM TO BE SOLVED: To turn the entire injector to an easily usable thickness even in the case of use for the small capacity of injection medicine and to make the fingers of a user able to sufficiently hold the injector no matter which position the injector is rotated to. SOLUTION: This injector is provided with a cylindrical cylinder 1 made of glass whose both ends are opened, two elastic stoppers 2a and 2b arranged separately from each other for air-tightly and liquid-tightly sealing the cylinder 1 and forming a space 3 for filling and keeping liquid medicine 4 and a cylinder tip 5 for attaching an injection needle externally fitted to one end of the cylinder 1. A cylindrical holder 10 is provided so as to cover the fitting part of the cylinder tip 5 and the cylinder 1 and the outer part of the cylinder 1. For the holder 10, an inner flange 10a provided on one end is engaged with a ring-like step part 5a formed at the outer periphery of the cylinder tip 5, the other end is engaged with a ring-like engaging member 13 interposed between the other end of the holder 10 and the cylinder 1 and thus, movement in the axial direction is controlled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a so-called container / syringe in which a glass cylinder is pre-filled with a drug and a rubber stopper for maintaining the hermeticity of the drug is inserted. The present invention relates to a container / syringe widely applied regardless of whether it is a one-chamber type represented by JP-A-158143 or a two-chamber type represented by Japanese Patent Application No. 61-147223.

[0002]

2. Description of the Related Art In recent years, a container / syringe which has been developed has a symmetrical cylindrical glass cylinder with one end provided with a plastic inner diameter substantially equal to or slightly smaller than the outer diameter of the cylinder. Is press-fitted and fitted, and an injection needle is attached via this cylinder tip.

Here, a cylindrical portion is formed at the tip of the cylinder in the fitting direction with the cylinder. The inner diameter of the cylindrical portion is set slightly larger than the outer diameter of the rubber stopper so that the rubber stopper can be loosely fitted in the internal space. Vertical grooves are formed.

[0004] Due to such a structure, when the container / syringe is used, the medicine sealed in the cylinder moves toward the cylinder tip with the advance of the plunger rod, and at the same time, the medicine is moved to the front of the cylinder. The inserted rubber stopper moves and fits from the cylinder into the cylindrical portion of the cylinder tip, and the medicine is guided to the injection needle along the inner vertical groove of the cylinder portion, whereby the liquid medicine in the cylinder is guided to the injection needle. It has become. Therefore, in such a container / injection syringe, compared to the conventional container / injection syringe in which the rubber stopper on the front side has to be punctured with a needle, the generation of cuttings (coring) of the rubber stopper is greatly reduced. It had advantages.

[0005]

However, when used for a syringe having a capacity of 1 ml or less, the outer diameter of the glass cylinder is small when the syringe is used for a container and a syringe, and when the doctor handles the syringe, the operation is difficult. There was a drawback that it was difficult to do. In addition, a female screw is provided on the syringe needle mounting tip to prevent the syringe needle from accidentally coming off due to an increase in internal pressure during use, and a mechanism for screwing and attaching the needle base of the syringe needle (Luer lock type) However, depending on the injection needle used, the orientation of the blade edge of the injection needle when screwed and attached is often very important. In particular, when the needle tube of the injection needle is curved, such as that used in ophthalmic surgery, after screwing the needle into the barrel of the syringe, turn the syringe so that it is easy to use according to the direction of the needle tip. The case to use comes out. In such a case, if the flange that locks the user's finger is rectangular or elliptical as in the related art, the finger may not be locked depending on the position in some cases. It has been pointed out that when a delicate feel is required as in the case of the above-mentioned ophthalmic surgery, this is a very important factor, and it is necessary to solve this.

The present invention has been made in view of the above circumstances, and even when used for small-volume injections, the entire syringe is made to have an easy-to-use thickness, and at the same time, the user's finger can be turned to any position. An object of the present invention is to provide a container / syringe that can sufficiently hold a syringe.

[0007]

According to the first aspect of the present invention, a cylindrical glass cylinder having both ends opened is provided.
The cylinder is air-tightly and liquid-tightly sealed and filled with chemicals.
At least two elastic stoppers which are arranged apart from each other to form a storage space, and a syringe tip for fitting an injection needle externally fitted to one end of the cylinder, and a fitting portion between the cylinder tip and the cylinder, and A cylindrical holder is provided so as to cover the outside of the cylinder, and a flange for locking a user's finger is provided at an end of the holder opposite to the cylinder tip so as to protrude outward, The holder has an inner flange provided at one end engaged with a ring-shaped step formed on the outer periphery of the cylinder tip, and the other end interposed between the other end of the holder and the cylinder. By being engaged with the ring-shaped engagement member, relative movement in the axial direction with respect to the glass cylinder is restricted. According to a second aspect of the present invention, the engaging member is characterized in that a tip portion inserted between the holder and the cylinder is formed in a tapered cross-sectional wedge shape. In the invention according to claim 3, the engaging member is fitted into the rear end of the cylinder with projections and recesses, so that relative movement in the axial direction with respect to the cylinder is restricted,
Further, an inner flange is provided at the other end of the holder, and the inner flange is engaged with a rear end of the engaging member, whereby relative movement in the axial direction with respect to the engaging member is restricted. I do. According to the fourth aspect of the present invention, the engaging member is unevenly fitted to the rear end of the cylinder to restrict relative movement in the axial direction with respect to the cylinder, and the rear end of the holder is unevenly fitted to the engaging member. Thus, relative movement in the axial direction with respect to the engagement member is restricted. The invention according to claim 5 is characterized in that the flange (11) provided on the holder for locking a user's finger is formed in a polygonal shape.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

<First Embodiment of the Invention> FIG. 1 is an overall sectional view of a container / syringe showing a first embodiment of the present invention. That is, reference numeral 1 in the drawing denotes a cylindrical glass cylinder having both ends open, and two rubber stoppers 2a and 2b are fitted in the cylinder 1 while being separated from each other. The rubber stoppers 2a and 2b form a space 3 hermetically and liquid-tightly sealed in the cylinder 1, and the space 3 is filled and stored with a chemical solution 4.

A cylinder tip 5 for mounting an injection needle is externally fitted to one end (left end in FIG. 1) of the cylinder 1. The tip 5 is
A tapered portion 6 for attaching the injection needle is provided at the center, and a female screw portion 7 that engages with a needle base flange (not shown) of the injection needle is provided outside the tapered portion 6. Note that, here, the needle base flange of the injection needle is not screwed to the female screw portion 7, and the cap 8 is engaged using an engaging portion formed at the distal end portion of the female screw portion 7. In addition, a cylindrical portion 9 is formed on the tip end side (left side in FIG. 1) of the fitting portion of the cylinder tip 5 with the cylinder 1. Cylindrical part 9
The inner diameter of the cylindrical portion 9 is set to a value slightly larger than the outer diameter of the rubber stopper 2a so that the rubber stopper 2a can be loosely fitted in the inner space, and the length of the cylindrical portion 9 is adjusted to the length of the rubber stopper 2a. The length is set to be longer than the entire length, and one or more vertical grooves 9 a are formed inside the cylindrical portion 9.

A cylindrical holder 10 is provided so as to cover a fitting portion between the cylinder tip 5 and the cylinder 1 and the outside of the cylinder 1. The holder 10 has an inner diameter of the cylinder 1 and the cylinder tip 5.
Is slightly larger than the outer diameter of the cylinder 1 and the length is set to be longer than the entire length of the cylinder 1 so that the fitting portion of the cylinder 1 and the cylinder tip 5 with the cylinder 1 can be completely covered from the outside. . A flange 11 for locking a user's finger is provided at an end (right end in FIG. 1) of the holder 10 opposite to the cylinder tip 5 so as to protrude outward. As shown in FIGS. 2A and 2B, the shape of the flange 11 is a polygon such as a substantially regular pentagon and a regular hexagon.

An inner flange 10a is provided at one end of the holder 10, and the inner flange 10a is formed on the outer periphery of the cylinder tip 5 and further on the distal end side (left end side in FIG. 1) of the fitting portion to the cylinder 1. It is engaged with the ring-shaped step 5a. Note that the holder 10 is made of a transparent plastic material.

A ring-shaped engaging member 13 is interposed between the other end (right end in FIG. 1) of the holder 10 and the end of the cylinder 1. The engaging member 13 is the holder 10
The cylinder 1 includes a cylindrical insertion portion 14 inserted between the cylinder 1 and an inwardly projecting ring portion 15 that abuts on an end of the cylinder 1. A plunger rod 16 whose tip is screwed into the rubber stopper 2b on the rear side is movably inserted into the center of the inwardly projecting ring portion 15. The distal end portion 14a in the insertion direction of the cylindrical insertion portion 14 is formed in a tapered cross-section wedge shape.

At the rear end of the cylinder 1, a ring-shaped projection 1 is provided.
a is provided, and a ring-shaped concave portion 14 b is formed in the cylindrical insertion portion 14 of the engagement member 13. The engagement between the ring-shaped projection 1a and the recess 14a corresponding to each other restricts the relative movement of the engagement member 13 with respect to the cylinder 1 in the axial direction. An inner flange 10 b is formed at the rear end of the holder 10, and the inner flange 10 b is in contact with the rear end 13 a of the engaging member 13. As described above, the holder 10 has an inner flange 10 a provided at one end and a ring-shaped stepped portion 5 of the cylinder tip 5.
a, and the relative movement in the axial direction with respect to the cylinder 1 is regulated by the inner flange 10b provided at the rear end abutting against the rear end 13a of the engaging member 13.

Next, the operation of the container / syringe having the above structure will be described. When using the combined container and syringe,
First, the cap 8 is removed, the injection needle is attached using the female screw portion 7, and the tip of the plunger rod 16 is screwed into the rubber stopper 2a on the rear side as shown in the figure. Then, the user turns the syringe in accordance with the position of the cutting edge of the injection needle, engages the middle finger and the index finger with the flange 11, respectively, and abuts the abdomen of the thumb against the rear end face of the plunger rod 16, and the plunger rod 16 Push forward. At this time, since the relative movement of the cylinder 1 and the holder 5 in the axial direction is restricted, the rear rubber stopper 2b moves forward with the movement of the plunger rod 16. At the same time, the medicine 4 sealed in the space 3 in the cylinder 1 moves forward, and the front rubber stopper 2a inserted in the front part of the cylinder 1 also moves forward, so that the cylinder tip 5 Is moved and fitted into the cylindrical portion 9 of the above.

Thereafter, by continuing to push the plunger rod 16 further, the medicine 4 is transmitted through the vertical groove 9a inside the cylindrical portion 9, and is further guided to an injection needle (not shown) attached to the cylinder tip 5. That is, the drug solution 4 in the cylinder 1 is guided to the injection needle.

Here, the holder 10 is fixedly attached to the outside of the cylinder 1, and the holder 10 is set to an appropriate diameter which is easy for the doctor to operate, so that the doctor's injection work can be performed smoothly. Further, since the flange 11 provided at one end of the holder 10 is formed in a polygonal shape, it is possible to lock a finger of a user such as a doctor at the angular position even when the container / syringe is in any rotational position. In particular, the needle tube of the injection needle is curved, such as that used in ophthalmic surgery, and after screwing the needle into the barrel of the syringe, turn the syringe so that it is easy to use according to the direction of the blade edge of the injection needle. This is advantageous when used.

<Second Embodiment of the Invention> FIG. 3 shows a second embodiment of the present invention. FIG. 3 is a cross-sectional view showing a main part of this embodiment. As can be seen from this figure, the feature of this embodiment is that the engaging member 20 and the holder 30 are fitted with concave and convex, Further, the outer flange 22 formed at the rear end of the engagement member 20 is in contact with the rear end 30a of the holder 30.

That is, a ring-shaped convex portion 21 is formed on the outer periphery of the engaging member 20, and a ring-shaped concave portion 31 is formed on the inner periphery of the holder 30. The fitting of the recess 31 restricts the relative movement of the holder 30 in the axial direction with respect to the engaging member 20 and the cylinder 1 which is fitted into and out of the engaging member 20. The other configuration is the same as that of the first embodiment, and the description is omitted here.

In this embodiment, since the outer flange 22 is provided on the engaging member 20, the engaging member 20 is
0 and the cylinder 1
Is brought into contact with the rear end 30a of the holder 30 so that the engagement member 2
The insertion position of 0 is known, and this has the advantage of facilitating the operation of inserting the engagement member. In this embodiment, a ring-shaped convex portion 21 is provided on the side of the engaging member 20 on the holder 3 side.
Although the ring-shaped concave portions 31 are provided on the 0 side, a ring-shaped concave portion may be provided on the engaging member side and a ring-shaped convex portion may be provided on the holder 30 side.

<Third Embodiment of the Invention> FIG. 4 shows a third embodiment of the present invention. The features of this embodiment are:
The difference is that the rear end of the engaging member 40 is folded outward and forward, and the rear end of the holder 50 is sandwiched between the folded portion 41 and the engaging member main body 42. Here,
A large-diameter portion 50a is provided at the rear end of the holder 50, and the large-diameter portion 51 is inserted into a concave portion 43 formed between the turn-back portion 41 and the engaging member 42 and extending in the depth direction.
The engagement member is designed so that the engagement between the engagement member and the engagement member does not easily come off. Also in this embodiment, the relative movement of the holder 50 in the axial direction with respect to the cylinder 1 can be restricted.

<Modifications> The above-described embodiment is merely an example, and the present invention can be modified as appropriate. For example, in the above-described embodiment, a single-chamber type has been described as an example. However, the present invention is not limited to this.
Even with multiple chamber-type syringes or more,
It goes without saying that the present invention is applicable.

[0022]

According to the first aspect of the present invention, the holder is fixedly attached to the outside of the cylinder, and the holder is set to an appropriate diameter which is easy for the doctor to operate.
Even if the amount of the drug to be injected is very small, the doctor's injection work is performed smoothly.

According to the second aspect of the present invention, since the engaging member is formed into a wedge-shaped cross section with a tapered tip portion inserted between the holder and the cylinder, the operation of inserting the engaging member is easy. And reliable insertion can be performed.

According to the third aspect of the present invention, the engaging member is fitted to the rear end of the cylinder in a concave and convex manner to restrict the relative movement in the axial direction with respect to the cylinder, and the inner flange is provided at the other end of the holder. Is provided, and the inner flange is engaged with the rear end of the engaging member to restrict the relative movement in the axial direction with respect to the engaging member. Can be regulated.

According to the fourth aspect of the invention, similarly to the third aspect of the invention, the axial relative movement of the holder with respect to the cylinder can be restricted with a simple structure.

According to the fifth aspect of the present invention, since the flange provided at one end of the holder is formed in a polygonal shape,
Even when the container / syringe is in any rotational position, the finger of a user such as a physician can be locked at that angular position, and in particular, the needle tube of the injection needle may be curved like that used in ophthalmic surgery. This is advantageous when the needle is screwed into the barrel of the syringe, and then the syringe is rotated for easy use in accordance with the direction of the cutting edge of the syringe needle.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a container / syringe according to a first embodiment of the present invention.

FIG. 2A is a front view showing a flange of the container / syringe according to the first embodiment of the present invention, and FIG. 2B is a front view showing another example.

FIG. 3 is a cross-sectional view showing a main part of a container / syringe according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a main part of a container / syringe according to a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 cylinder 2a, 2b rubber stopper 3 space 4 chemical solution 5 cylinder tip 5a ring-shaped step 10, 30, 50 holder 10a, 10b inner flange 11 flange 13, 20, 40 engaging member 14a distal end portion of engaging member 13a engaging Rear end of member

Claims (5)

[Claims] 1. A cylindrical glass cylinder (1) having both ends open and a space (3) for filling and storing a chemical solution (4) by hermetically sealing the inside of the cylinder in an air-tight and liquid-tight manner. At least two elastic stoppers (2a, 2b) formed to be spaced apart from each other
And a cylindrical tip (5) for mounting an injection needle externally fitted to one end of the cylinder, and a cylindrical holder (10) for covering a fitting portion between the cylindrical tip and the cylinder and an outer side of the cylinder. , 30, 50)
A flange (11) for locking a user's finger is provided at an end of the holder opposite to the cylinder tip so as to protrude outward, and the holder is provided at one end. A flange (10a) is engaged with a ring-shaped step (5a) formed on the outer circumference of the cylinder tip, and the other end is a ring-shaped engagement interposed between the other end of the holder and the cylinder. Joint member (13, 2
0, 40), wherein the relative movement in the axial direction with respect to the glass cylinder is restricted. 2. The container serving as a container according to claim 1, wherein the engaging member has a tip portion (14a) inserted between the holder and the cylinder, and has a tapered cross-section wedge. Syringe. 3. The engaging member is fitted into the rear end of the cylinder in an uneven manner to restrict relative movement in the axial direction with respect to the cylinder, and has an inner flange (10) at the other end of the holder.
b) is provided, and the inner flange is engaged with a rear end (13a) of the engaging member to restrict axial movement relative to the engaging member.
The combined container and syringe described in the above. 4. The engaging member is fitted to the rear end of the cylinder so that the relative movement in the axial direction with respect to the cylinder is restricted, and the rear end of the holder is fitted to the engaging member so as to be engaged. The container / syringe according to claim 1 or 2, wherein the relative movement in the axial direction with respect to the joint member is restricted. 5. The container according to claim 1, wherein a flange provided on the holder for locking a user's finger is formed in a polygonal shape. Syringe.