JPH06327771A - Syringe packed with liquid chemicals - Google Patents

Abstract

PURPOSE:To provide the syringe packed with a liquid chemicals which has the excellent liquidtightness and slidability of a plug body, does not require assembly and can be inexpensively produced. CONSTITUTION:This syringe has an outside cylinder 1 which has a nozzle N at its front end, a prescribed amt. of the liquid chemicals which is packed into this outside cylinder 1 and the plug body 2 which liquidtightly seals the liquid chemicals and is freely slidable to the outside cylinder 1. In addition, the plug body 2 is formed by integral plastic molding of a liquidtight disk 22 having an outer peripheral part which comes into sliding contact with the inside surface of the outside cylinder 1 by elastic deformation with a main body having a presser connecting part at its rear end so that the liquidtightness and slidability of the plug body are realized with the simple constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a syringe filled with a drug solution in which a predetermined amount of drug solution is filled in advance.

[0002]

2. Description of the Related Art A syringe filled with a drug solution is filled with a predetermined amount of drug solution in an outer cylinder (also referred to as a syringe) having a nozzle at its tip, and the drug solution is sealed by a stopper slidable on the inner surface of the outer cylinder. It has stopped. By connecting a pusher (also referred to as a plunger) to the connecting portion of the stopper body, a syringe filled with a drug solution of which type and amount have been determined in advance can be configured.

This syringe filled with the drug solution saves the trouble of sucking the drug solution and can immediately respond to an urgent case. Since the drug name can be printed on the outer cylinder, misuse can be prevented. The injection amount can be accurately transferred. Since it is disposable, it maintains its sterility. There is no risk of contamination with glass powder due to ampoule cutting or rubber fragments due to piercing with a vial. Easy handling of highly viscous chemical liquids that are difficult to suck Since it has many excellent features such as the above, it has rapidly spread in the medical field in recent years.

Conventionally, the syringe filled with the chemical solution has an outer cylinder made of hard borosilicate glass excellent in chemical resistance, and a stopper body is made of plastic (butyl rubber or the like) and is also made of plastic (butyl rubber or the like). The thing which covers the packing part of is often used.

[0005]

SUMMARY OF THE INVENTION In the above conventional syringe filled with a chemical solution, (1) since the stopper body is in contact with the chemical solution for a long time (about 1 to 2 years), the composition component of the packing part coated on the stopper body is There is a risk of elution in the chemical solution. (2) A fluororesin coating or the like may be formed on the surface of the packing to prevent elution from the packing, but this is troublesome and the slidability deteriorates. (3) In the plug assembly process of packaging the packing part on the base part, it is not possible to exclude the possibility that dirt and various bacteria will adhere. (4) It is necessary to separately manufacture and manage the three parts of the outer cylinder, the base portion, and the packing portion, which increases the cost. Had problems such as. In view of the above points, an object of the present invention is to provide a drug solution-filled syringe which is excellent in liquid-tightness and slidability of a stopper and which can be manufactured inexpensively without assembly.

[0006]

In order to achieve the above-mentioned object, a syringe filled with a drug solution of the present invention comprises an outer cylinder having a nozzle at its tip, and a predetermined amount of the drug solution filled in the outer cylinder.
A liquid-tight seal for the chemical liquid and a plug body that is slidable with respect to the outer cylinder, and the plug body is elastically deformed on the inner surface of the outer cylinder into a main body having a pusher connecting portion at the rear portion. A liquid-tight disk provided with an outer peripheral portion in sliding contact is integrally molded with plastic so that the liquid-tightness and slidability of a plug can be realized with a simple structure.

Further, the two liquid-tight discs are installed close to each other, so that the liquid-tight sealing is made more reliable and the tilting of the stopper body is restored. Further, the outer peripheral portion of the liquid-tight disc is formed into a convex peripheral portion having an arc-shaped cross section so that the liquid-tightness and slidability are not lost even if the plug body tilts.

[0008]

[Function] A glass outer cylinder is filled with a predetermined amount of chemical liquid,
A stopper is inserted to seal the drug solution. At this time, the liquid-tight disc is
The outer peripheral edge is elastically deformed and slidably contacts the inner surface of the outer cylinder to shield the liquid medicine in the outer cylinder from the outside air. Since the main body of the stopper that comes into contact with the chemical liquid and the liquid-tight disc are integrally molded of plastic and do not have rubber members, etc., even when stored for a long time,
The constituent components never elute into the drug solution. When the two liquid-tight discs are arranged close to each other, the liquid-tightness of the discs is increased and the restoring force for the tilting of the stopper is improved.

Further, if the outer peripheral portion of the liquid-tight disc is formed into a convex peripheral portion having an arcuate cross section, the contact state between the inner surface of the outer cylinder and the outer peripheral portion hardly changes due to tilting of the plug, and the liquid Denseness and slidability are not lost. Attach an injection needle to the nozzle at the tip of the outer cylinder,
By connecting the presser to the connecting portion of the stopper body, it is possible to immediately obtain a syringe filled with a predetermined amount of the drug solution.

[0010]

Embodiments of the present invention will be described in detail below with reference to the drawings. 1 to 5, reference numeral 1 denotes an outer cylinder, and the outer cylinder 1
Is formed into a cylindrical shape having a nozzle N at the front end and an open rear end. The outer cylinder 1 is preferably made of hard borosilicate glass having excellent chemical resistance and good non-elution property, but thermoplastic resin such as polypropylene, polycarbonate, polystyrene is injected for the purpose of cost reduction. It may be formed by molding. A predetermined amount of the chemical liquid Y is filled in the outer cylinder 1, and the surface of the outer cylinder 1 is
The chemical name of the chemical liquid Y is printed.

Reference numeral 2 denotes a plug, which is used to shield the chemical solution Y in the outer cylinder 1 from the outside air. here,
The plug 2 is formed by integrally molding a main body 21 and a liquid-tight disc 22 with plastic. The main body 21 is provided with a pusher connecting portion (screw hole) 21A at its rear portion, and by connecting (screwing) the pusher to the connecting portion 21A, the outer cylinder 1
Injection pressure can be applied inside.

Reference numeral 3 is a thick disk, and the thick disk 3 is a pusher 1.
It is a strength member that transmits a pressure of 0 to the chemical liquid Y side, and at the same time, prevents the stopper body 2 from collapsing, and is configured to have substantially the same diameter as the inner surface 1A of the outer cylinder 1, and with respect to the inner surface 1A. It is designed to make sliding contact without elastic deformation. As shown in each of the embodiments, only one thick disk 3 may be provided to simplify the configuration, or two thick disks 3 are provided to positively prevent tilting during sliding. The configuration may be different.

The liquid-tight disc 22 is for sealing the chemical solution Y in a liquid-tight manner, and is constructed to have a diameter slightly larger than the inner surface of the outer cylinder 1, and the outer peripheral portion 22A of the disc with respect to the inner surface. Alternatively, the entire plate surface is elastically deformed so that the outer peripheral portion 22A is in sliding contact. Here, the outer peripheral portion 22A may have a flat cross-sectional shape as shown in FIG. 6 (b), but as shown in FIG. 6 (a), it is formed as a convex peripheral portion having an arc-shaped cross section. if,
Even if the plug 2 is tilted when the pusher is pressed, the liquid tightness with respect to the inner surface 1A of the outer cylinder 1 is not lost. The liquid-tight disc 22 is
Only one sheet may be provided to simplify the configuration,
Two pieces may be provided to improve the resilience against tilting during sliding.

In the first embodiment shown in FIG. 1, the stopper body 2 includes one thick disk 3 as a main body 21 and one liquid-tight disk 22.
It consists of The liquid-tight disc 22 is integrally provided on the front side of the main body 21 (on the side of the chemical liquid Y) via a rod-shaped connecting portion R. The number of parts constituting the first embodiment is only two, that is, the outer cylinder 1 and the plug 2, so that the structure is simple and low-cost production is possible.

In the second embodiment shown in FIG. 2, the stopper 2 has one thick disk 3 as a main body 21 and one liquid-tight disk 22.
It consists of The liquid-tight disc 22 is integrally provided on the front side (the chemical Y side) of the main body 21 via a circumferential groove M.
That is, the liquid-tight disc 22 is configured such that only the outer peripheral portion 22A thereof is elastically deformed and comes into sliding contact with the inner surface 1A of the outer cylinder 1, and the flexibility is inferior to that of the first embodiment, Tiltability during sliding is less. This second embodiment also
Similar to the first embodiment, it has a simple structure of only two points, that is, the outer cylinder 1 and the plug body 2, and low-cost production is possible.

In the third embodiment of FIG. 3, two thick discs 3 are provided as a main body 21, and one liquid-tight disc 22 is rod-shaped between the two thick discs 3. It is integrally provided via the connecting portions R, R. In this embodiment, the two thick discs 3 improve the tilting stability of the plug body 2 when sliding, compared to the first and second embodiments.

In the fourth embodiment shown in FIG. 4, the stopper body 2 comprises one thick-walled disc 3 serving as the main body 21 and two liquid-tight discs 22.
Is equipped with. That is, the two liquid-tight discs 22 are installed adjacent to each other on the front side of the thick disc 3 via the rod-shaped connecting portions R, R and are integrally connected. In this embodiment, the liquid-tight disc 22 is
By adopting a single-piece structure, liquid-tight sealing is made more reliable, and a restoring force for tilting of the plug 2 is provided.

In the fifth embodiment of FIG. 5, the plug 2 has two
It is provided with one thick disk 3 and two liquid-tight disks 22.
That is, two liquid-tight discs 22 are installed adjacent to each other between the two thick discs 3 and the discs are integrally connected via the rod-shaped connecting portions R, R, R. In this embodiment, the thick-walled disc 3 is configured to have two pieces to more securely prevent the plug 2 from tilting, and the liquid-tight disc 22 is configured to have two pieces to perform liquid-tight sealing. It is designed to be more certain.

In the first to fifth embodiments described above, the threaded portion 10A of the pusher 10 is connected to the pusher connecting portion (screw hole) 21A of the main body 21 of the stopper 2, and the injection needle is attached to the tip nozzle N. When attached, the name of the drug is fixed in advance and a syringe equipped with a fixed amount of the drug solution is immediately constructed. Here, when the pusher 10 is pressed, the pressing force is transmitted to the chemical liquid Y via the thick disk 3 and the liquid-tight disk 22. At this time, since the liquid-tight disc 22 slides in liquid-tight contact with the inner surface 1A of the outer cylinder 1, the pressurized chemical liquid Y is ejected from the nozzle N.

[0020]

As described above, the syringe filled with the drug solution of the present invention has an outer cylinder having a nozzle at its tip, a predetermined amount of the drug solution filled in the outer cylinder, and a liquid-tight seal for the drug solution. A liquid-tight seal that includes a plug body that is slidable with respect to an outer cylinder, and that has a peripheral portion that is elastically deformed and slidably contacts the inner surface of the outer cylinder with a main body that has a pusher connecting portion at the rear portion. Since the disc is integrally molded with plastic, it is possible to realize the liquid tightness and slidability of the plug with a simple structure.

Further, since the two liquid-tight discs are arranged close to each other, it is possible to have the resilience to the tilting of the plug. Further, since the outer peripheral portion of the liquid-tight disc is formed into a convex peripheral portion having an arc-shaped cross section, it is possible to prevent the liquid-tightness and slidability from being lost even if the plug body tilts. . As a result, it is possible to provide an excellent effect that a drug solution-filled syringe having a predetermined drug name and a predetermined amount of drug solution can be optimally provided as a syringe.

[Brief description of drawings]

FIG. 1 is a principle configurational diagram showing a first embodiment in which a thick disk is provided at the rear of a liquid-tight plate.

FIG. 2 is a principle configuration diagram showing a second embodiment in which one liquid-tight plate and one thick disk are integrated via a circumferential groove.

FIG. 3 is a principle configuration diagram showing a third embodiment in which one thick-walled disc is arranged in front of and behind one liquid-tight plate.

FIG. 4 is a principle configurational diagram showing a fourth embodiment in which two liquid-tight plates are arranged on the front side of one thick disk.

FIG. 5 is a principle configurational diagram showing a fifth embodiment in which two thick discs are provided and two liquid-tight plates are arranged adjacent to each other between the two thick discs.

FIG. 6 (a) is a principle view in the case where the outer peripheral portion of the liquid-tight plate is formed into a convex peripheral portion having an arc-shaped cross section. (B) It is a principle view at the time of making the outer peripheral part of a liquid-tight plate smooth.

[Explanation of symbols]

 1 Outer Cylinder 2 Plug 21 Thick Disk 22 Liquid Tight Disk 22A Outer Perimeter N Nozzle M Circumferential Groove R Rod

Claims (3)

[Claims] 1. An outer cylinder having a nozzle at its tip, a predetermined amount of a chemical liquid filled in the outer cylinder, and a plug body that liquid-tightly seals the chemical liquid and is slidable with respect to the outer cylinder. In addition, the plug body is formed by integrally molding a liquid-tight disc having an outer peripheral portion that elastically deforms and slidably contacts the inner surface of the outer cylinder on a main body having a pusher connecting portion at the rear portion. A syringe filled with a drug solution characterized in that: 2. The syringe filled with a liquid medicine according to claim 1, wherein two liquid-tight discs are installed close to each other. 3. The drug solution filled syringe according to claim 1, wherein an outer peripheral portion of the liquid-tight disc is a convex peripheral portion having an arc-shaped cross section.