JP2001340455A - Syringe container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hygienically quite safe syringe container of a cartridge type by eliminating risks of contaminating a drug solution in changing its attachment in a syringe container whose attachment with a nozzle at its tip is changed for every use. SOLUTION: A nozzle 22 is arranged in a front edge, and a through-hole 21 along a central axis including the nozzle 22 is arranged. The tip of the nozzle 22 is closely covered with a cap 28 and a piston 26 is closely but slidably joined to an end part of the through-hole 21. A rear end part of an attachment 2 which the drug solution is hermetically stored is detachably fixed to a front edge of an axis aperture 12 of a body pipe 1 equipped with a maneuver rod 3 to push the piston 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a syringe container mainly used for dental treatment and the like.

[0002]

2. Description of the Related Art As a syringe container of this kind, a syringe cylinder having a nozzle at the tip is integrally formed of a relatively hard synthetic resin material, and a chemical solution contained in the syringe cylinder is pushed into the nozzle by pushing a piston. Is injected into the affected area in the oral cavity and injected.

[0003] However, since the above syringe container is disposable each time it is used from a hygiene point of view, not only the container itself but also the chemical solution remaining in a considerable amount inside must be discarded each time. It was uneconomical.

To solve such a problem, Japanese Patent Laid-Open Publication No.
No. 243160 discloses a configuration in which a tip (attachment) having a nozzle (tube) at the tip is detachably screwed to the tip of the cylinder body, and only the tip is replaced each time the tip is used. An injection device is disclosed.

[0005]

However, in the prior art described in the above-mentioned publication, since the chemical is filled in the through-hole (shaft hole) communicating from the cylinder body to the tip of the tip, the tip replacement is performed. In some cases, when the chip is removed from the cylinder main body, the liquid surface of the chemical remaining in the cylinder main body is exposed, so that there is a problem that the chemical liquid may be contaminated from the exposed liquid surface.

Accordingly, the present invention has been made in order to solve the above-mentioned problems in the prior art. In a syringe container in which a member having a nozzle at the tip is replaced every time it is used, a chemical solution is contaminated when the member is replaced. An object of the present invention is to provide a cartridge-type syringe container that is completely sanitary and completely safe.

[0007]

Means for Solving the Problems Among the present invention for solving the above technical problems, the means according to the first aspect of the present invention is characterized in that a finger hanging flange is provided at a rear end of a cylindrical wall provided with a shaft hole along an axis. A nozzle is provided at the front end, a through hole is provided along the axis including the nozzle, a cap is tightly fitted to the tip of the nozzle, and a rear end of the through hole is provided. A piston is slidably tightly fitted to the part, the liquid medicine is hermetically sealed in the through hole, and an attachment that detachably attaches the rear end to the front end of the main body cylinder is provided in the shaft hole of the main body cylinder from the rear. The present invention has an operating rod which is slidably fitted so as not to come out, and whose front end pushes a piston to advance by pushing the piston into the main body cylinder.

In use, after the attachment is assembled to the front end of the main body cylinder, the cap is removed, the tip of the nozzle is positioned in the affected area such as the oral cavity, and the operating rod is pushed in. Move forward and inject the drug solution into the affected area.

The used attachment is removed and discarded, and is replaced with a new one. However, since the chemical is sealed and stored in the attachment, the liquid surface is not exposed at all when the attachment is replaced. There is no risk of contamination.

According to a second aspect of the present invention, in the first aspect of the present invention, a fitting tube portion is provided at the rear end of the attachment so as to fit into the shaft hole of the main body tube, and the outer peripheral surface of the fitting tube portion is engaged with the fitting tube portion. At the front end of the inner peripheral surface of the main body cylinder, a guide groove is provided along the axis at which the engaging protrusion of the attachment is slidable, and the engaging protrusion of the attachment is engageable. An engagement groove was provided in the circumferential direction continuously from the rear end of the guide groove,
It is a thing that added.

According to the second aspect of the present invention, when the attachment is assembled, the fitting cylinder is inserted into the main body cylinder while the engaging projection of the attachment is slid along the guide groove of the main cylinder. Then, when the attachment is twisted in the circumferential direction when the engagement protrusion comes into contact with the engagement protrusion, the engagement protrusion engages with the terminal end of the engagement groove and is assembled. When the attachment is removed, the operation opposite to the above operation is performed. , The attachment can be easily detached, so that attachment and detachment of the attachment can be easily and quickly achieved by one-touch operation.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The syringe container according to the present embodiment includes a main body cylinder 1 formed of an appropriate synthetic resin,
Cartridge type attachment 2 having nozzle 21
And an operation rod 3.

The main body cylinder 1 is provided with a pair of axially symmetrical guide grooves 13 at the front end of an inner peripheral surface of a cylindrical cylindrical wall 11 provided with a shaft hole 12, and a pair of guide grooves 13 behind each guide groove 13. At the ends, a pair of engagement grooves 14 are respectively formed in the same circumferential direction and at a predetermined same length so as to be continuous with the guide grooves 13.

At the rear end of the cylindrical wall 11, a finger-hanging flange 15 is integrally provided, and at the middle of the cylindrical wall 11, the front end is slightly protruded from the inner peripheral surface of the cylindrical wall 11. The locking claw piece 16 is formed in a punched shape.

The attachment 2 for hermetically containing a chemical solution in the through hole 21 is formed of a nozzle 22 bent at the front end, a gripping cylinder 23 at the center, and a fitting cylinder 24 at the rear end. Both ends of the through hole 21 are hermetically sealed by a cap 28 (see FIG. 2) that closely fits the tip of the nozzle 22 and a piston 26 that slidably fits tightly on the rear end of the through hole 21. .

On the front surface of the piston 26, there is provided a projection 27 for reducing the remaining amount when the chemical is poured out.
The guide groove 1 of the main body cylinder 1 is provided on the outer peripheral surface of the fitting cylinder portion 24.
A pair of engaging projections 25 slidable in the inside 3 and engageable with the end portions of the engaging grooves 14 are provided at predetermined axially symmetric positions.

The operating rod 3 is formed of a front small diameter portion 31, a middle diameter portion 32, and a rear large diameter portion 33 slidingly contacting the shaft hole 12 of the main body cylinder 1. An operation flange 34 is integrally provided at one end, and a locking flange 35 having substantially the same diameter as the large diameter portion 33 is integrally provided at the front end of the middle diameter portion 32.

The assembly of this syringe container will be described. First, as shown in FIG.
Is inserted into the shaft hole 12. At this time, since the locking flange 35 gets over the front end of the locking claw piece 16,
The contact of the rear surface of the locking flange 35 with the front surface of the locking claw piece 16 prevents the operation rod 3 from falling out of the main body cylinder 1.

Next, the through-hole 21 is filled with a chemical solution, and the attachment 2 sealed by the piston 26 and the cap 28 is assembled to the main body cylinder 1. In this case, the engaging projection 25, the guide groove 13, Is inserted into the front end of the shaft hole 12 while the engagement projection 25 slides in the guide groove 13 and abuts against the end surface thereof, and the attachment 2 is moved in a predetermined circumferential direction. If you twist it hard,
Since the engaging projection 25 is tightly and elastically engaged with the end portion of the engaging groove 14, the attachment 2 is positioned and assembled in a predetermined direction with respect to the main body cylinder 1 (see FIG. 3).

The attachment / detachment means for attaching / detaching the main body cylinder 1 and the attachment 2 may be any suitable means other than the above, such as screwing.

[0021]

Since the present invention has the above-described structure, the following effects can be obtained. According to the first aspect of the invention, when the attachment in which the liquid medicine is hermetically stored is used by being detachably attached to the main body cylinder and used, the hermetically sealed storage of the attachment is achieved and maintained by the piston functioning to discharge the liquid chemical. Therefore, at the time of this attachment replacement, there is no possibility that the liquid surface of the chemical solution is exposed, and therefore, there is no possibility that the chemical solution is contaminated, and therefore, it is possible to provide a cartridge type syringe container which is completely safe in a sanitary manner. it can.

In the new attachment which has been exchanged, the piston is positioned at a fixed position with a fixed amount of the medicinal solution stored therein. Therefore, the positioning of the operating rod in the combination of the main body cylinder and the operating rod is performed. Therefore, it is possible to always use the chemical solution in an appropriate state.

According to the second aspect of the present invention, replacement of the attachment can be achieved by a linear insertion / removal operation and a slight rotation operation, and the attachment of the attachment to the main body cylinder has a key lock shape. Therefore, attachment replacement can be achieved easily and quickly, and the attachment can be firmly and stably replaced with the main body cylinder.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention.

FIG. 2 is a perspective view showing a state of the embodiment shown in FIG. 1 before an attachment is assembled.

FIG. 3 is a perspective view showing an attachment assembled state of the embodiment shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1; Main body cylinder 11; Cylindrical wall 12; Shaft hole 13; Guide groove 14; Engagement groove 15; Finger hook flange 16; Part 25; engagement projection 26; piston 27; projection 28; cap 3; operation rod 31; small diameter part 32; medium diameter part 33; large diameter part 34;

Claims (2)

[Claims] 1. A cylindrical wall (11) provided with a shaft hole (12) along the axis.
Body tube (1) with finger flange (15) integrated at the rear end
And a nozzle (22) extending from the front end, and the nozzle (2
A through hole (21) is provided along the axis including 2), and the nozzle
A cap (28) is tightly fitted to the tip of (22), and the through hole (2
1) A piston (26) is slidably fitted tightly on the rear end of the main body cylinder (1), and the liquid medicine is hermetically stored in the through hole (21). Attachment (2)
And slidably and slidably fit from the rear into the shaft hole (12) of the main body cylinder (1), and when pushed into the main body cylinder (1), the front end presses the piston (26). A syringe rod comprising an operating rod (3) for moving forward. 2. A main body cylinder is provided at a rear end of the attachment (2).
(1) is provided with a fitting tube portion (24) to be fitted into the shaft hole (12), and an engaging projection (25) is protrudingly provided on an outer peripheral surface of the fitting tube portion (24);
At the front end of the inner peripheral surface of (1), a guide groove (13) in which the engagement protrusion (25) is slidable is provided along the axis, and the engagement protrusion (25) is engageable. The syringe container according to claim 1, wherein the engagement groove (14) is provided in a circumferential direction continuously from a rear end of the guide groove (13).