JPH0226510Y2 - - Google Patents

Description

[Detailed description of the invention] [Technical field of the invention] The present invention is a medical liquid injector (hereinafter simply referred to as an injector) used for injecting cleaning liquids, medical liquids, etc. into the bodies of animals such as cows and horses, or into the human body. (referred to as ).

[Technical background of the invention and its problems]

This is an improved version of the conventional enema device, with a press-deformable container body with a discharge port at one end and a filling port at the other end, a lid screwed onto the filling port, and a catheter connected to the end of the discharge port. However, a syringe was proposed as Japanese Utility Model Application No. 57-26242, in which a nozzle with a check valve was fitted to the tip of a catheter, and a cap was fitted to the nozzle head. This syringe is designed with a check valve built into the nozzle to prevent the injected drug from flowing backwards so that the drug can be injected deep into the body. I was supposed to get it.

However, if the catheter is too long, it becomes difficult to handle, so when it is necessary to inject the drug solution quite deep into the body of a cow or horse, it is necessary to press the body of the container all at once and eject the required amount more forcefully than the nozzle. The above chemicals were injected to reach the target location. However, if it was ejected too strongly, it could damage the inner wall.

[Purpose of invention]

The present invention was devised based on the above-mentioned circumstances, and it is an object of the present invention to provide an injector that can easily inject a medicinal solution even deep into the body.

[Summary of the idea]

The outline of the present invention for achieving the above object is to provide a liquid drug injector having a discharge port provided at the tip of a press-deformable container body, a catheter connected to the discharge port, and a medical liquid backflow prevention valve in the catheter. A filling port is provided at the rear of the container body, a constricted tube is attached to the filling port, a connecting tube is fitted to the constricted tube so that it can move back and forth but cannot be separated, and a cap is fitted to the connecting tube,
The stenotic tube has a valve seat inside the stenotic tube, and the connecting tube that fits into the stenotic tube has a flange on the outer periphery of the inner cylinder to be inserted into the stenotic tube.
An outer cylinder that fits on the outside of the stenotic tube protrudes longer than the inner cylinder from the collar, and a columnar valve is provided to allow water to flow from the inside of the inner tube toward the container body, so that when the connecting tube is drawn toward the container body, the columnar valve It is characterized in that the valve is configured so as to be in close contact with the valve seat.

[Example of idea]

This syringe has a filling port 2 at one end of a press-deformable container body 1 and a discharge port 3 at the other end, a constricted tube 4 is welded to the filling port 2, and a connecting tube 5 is moved back and forth to the constricted tube 4. The cap 6 is fitted into the connecting tube 5 in a removable and irremovable manner, and the catheter 7 is inserted into the outlet port 3.
A check valve 8 is provided at the base of the catheter 7, a nozzle 9 is fitted to the tip of the catheter 7, and a lid 10 is fitted to the nozzle head. The container body 1 is molded from synthetic resin, and has a cylindrical body large enough to be held, with a filling port 2 at one end and a discharge port 3 at the other end.
has. The constricted tube 4 welded to the filling port 2 is provided with a valve seat 11 therein, and has an inward projecting edge 13 at the tip of a valve chamber 12 that projects forward. The connecting tube 5 that fits into the stenotic tube 4 has an inner tube 14 that is inserted into the stenotic tube 4.
A flange 15 is provided on the outer periphery of the inner cylinder 14 , and an outward protruding edge 17 that engages with the inward protruding edge 13 of the stenotic tube valve chamber 12 is provided at the rear of the inner cylinder 14 , that is, at the inner cylinder mouth edge on the side of the container body.
The outer cylinder 18 that fits around the outer circumference of the constricted tube 4 is connected to the inner cylinder 14.
The front part of the valve chamber 12 of the constriction tube 4 is inserted between the inner cylinder 14 and the outer cylinder 18 so as to be slidable back and forth, and the outward projecting edge 17 of the inner cylinder 14 and the projecting edge 17 The inward protruding edge 13 of the stenotic tube 4 that is engaged with the stenotic tube 4 makes it impossible to remove the stenotic tube 4, and a support piece 19 is provided toward the center from the rear of the inner tube 14, and A columnar valve 20 is provided protruding rearward from the inner cylinder 14, and the columnar valve 20 closes in close contact with the valve seat 11 when the connecting tube 5 that fits into the stenotic tube 4 is drawn toward the container body. It is. On the other hand, when the connecting pipe 5 is pulled away from the container body and slid until the outward projecting edge 17 of the connecting pipe inner cylinder 14 and the inward projecting edge 13 of the stenotic pipe valve chamber 12 are engaged, the columnar valve 20 becomes a valve. loosely inserted into the valve chamber 12 away from the seat 11,
This allows ventilation from the valve seat 11 into the connecting pipe. Further, a wedge portion 21 is provided on the front portion of the inner cylinder 14, that is, on the outer periphery of the inner cylinder 14 that protrudes from the collar 15 to the side opposite to the outer cylinder 18, so that a hose can be irremovably fitted therein.

Since the proposed syringe has the above structure, when using it, make sure that the valve seat 11 is covered with the columnar valve 20, and then insert the catheter 7 with the lid 10 removed as far as possible into the body. do. After inserting the catheter 7 into the body, when the body of the container is pressed, the medicinal solution is injected into the body through the nozzle 9. After injecting most of the medicinal solution into the body, remove the cap 6, pull the connecting tube 5 away from the container body 1, and remove the valve seat 1.
When the columnar valve 20 that was blocking the filling port 2 is separated, the filling port 2 becomes ventilated, so that the container body, which had been pressed and collapsed, expands due to its elasticity and returns to its shape before being pressed. Then, the connecting pipe 5 is pulled toward the container body, the valve seat 11 is closed with the columnar valve 20, and the container body is pressed again, the air that has flowed into the container is sent into the body through the catheter, and the medicinal solution injected into the body is further penetrated deep into the body. Press fit. In other words, when a hose is attached to the inner cylinder 14 of the connecting pipe and air is sent into the container through the hose, the air fills the container and pushes out the remaining drug solution into the body through the nozzle 9, further displacing the drug solution injected into the body. It applies pressure to reach deeper parts.

[Effect of idea]

The proposed syringe has a valve seat inside the constricted tube installed at the filling port as described above, and a columnar valve is provided on the connecting tube that fits into the constricted tube so that it can move back and forth, and the connecting tube is drawn toward the container body. Since the columnar valve is designed to cover the valve seat, it is easy to open and close the filling port, and the hose can be connected to the connecting pipe in a ventilated state with the filling port closed. No chemical solution leaks from the parts. In addition, if most of the medicinal solution is injected into the body, then open the filling port and send air into the container from the hose end, all the remaining medicinal solution will be injected into the body, so there is no waste of the medicinal solution, and if you continue to supply air, Since the medicinal solution is pushed deep into the body, it has become possible to easily inject the medicinal solution deep into the body, which was difficult to inject with conventional syringes.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of the proposed syringe;
Figure 2 is an enlarged sectional view of the main part of the columnar valve in the open state, Figure 3 is a side view of the connecting pipe seen from the protruding side of the columnar valve, and Figure 4 is a partially cutaway front view of a conventional syringe. be. DESCRIPTION OF SYMBOLS 1...Container body, 2...Filling port, 3...Discharge port, 4...Stenosis tube, 5...Connecting pipe, 6...Cap, 7...Catheter, 8...Check valve, 11...
Valve seat, 14... Inner cylinder, 15... Tsuba, 18... Outer cylinder, 20... Pillar valve.

Claims (1)

[Scope of utility model registration request] In a liquid drug injector, a discharge port 3 is provided at the tip of a press-deformable container body 1, a catheter 7 is connected to the discharge port, and a liquid medicine backflow prevention valve 8 is provided in the catheter. A constricted tube 4 is attached to the filling port, a connecting tube 5 is fitted to the constricted tube so that it can move back and forth and cannot be separated, and a cap 6 is fitted to the tip of the connecting tube, and the constricted tube is connected to the inside. Valve seat 1
1, the connecting tube that fits into the stenotic tube has a flange 15 on the outer periphery of the inner tube 14 that is inserted into the stenotic tube, and an outer tube 18 that fits on the outside of the stenotic tube protrudes longer than the inner tube from the flange. , a columnar valve 2 is placed on the side of the container body from the rear of the inner cylinder.
A medical liquid injector that is configured to allow water to flow through the columnar valve so that the columnar valve comes into close contact with the valve seat when the connecting pipe is drawn toward the container body.