JPH059089Y2 - - Google Patents

Description

[Detailed explanation of the invention] (Purpose of the invention) This invention relates to a metering injection container that uses an elastic bag as a metering means and an insoluble pressure gas such as nitrogen gas or laughing gas as a propellant. A simple method for attaching a valve housing or other valve device and the elastic bag to the rim of a container containing a solution under gas pressure to prevent leakage of the contents of the container and to prevent injection at other times than desired. Its purpose is to provide a reliable means of

(Structure of the device) This device will be explained below with reference to the illustrated embodiment. Reference numeral 3 denotes a valve stem having a shaft hole 31 for an injection passage, and a lip of a container 1 containing a solution under pressure of an insoluble gas. The shaft is tightly supported in a valve housing 2 fixed to 11 so as to be able to move up and down and rotate. However, in the illustration, 81 is a spring for elastic support of the valve stem 3, 82 is for rotatable close insertion of the valve stem 3 and leakage-preventing sealing of the valve housing 2, and a valve body of the injection valve described below. This is an elastic gasket that is also used as an elastic gasket.

Next, this invention is equipped with the following injection valve and liquid suction valve. The injection valve opens a passage between the upper part of the valve chamber 21 and the aforementioned shaft hole 31 of the valve stem 3 when the valve stem 3 is in a lowered position (not shown), and closes this passage when the valve stem 3 is in a lowered position (not shown). be. That is, according to the illustrated example, the elastic gasket 82 and the side hole 32 of the valve stem 3 constitute an injection valve.

The liquid suction valve described above has a liquid suction pipe 22 connected to the valve chamber 21 and the bottom of the valve chamber 21 in the lowered position of the valve stem 3.
and in the illustrated raised position opens this passage. That is, according to the illustrated example, a cap-shaped elastic valve 83 with a shaft hole is inserted into the lower part of the valve chamber 21 and elastically supported by a spring 84.
It will be clear that the injection valve is constituted by the bottom surface of the valve stem 3 and the bottom surface of the valve stem 3.

Next, 4 is an elastic metering bag, which is tightly connected to the valve chamber 21 within the container 1. 23 in the illustrated example is a through hole for connection.

Next, a push button 5 is provided with an injection port 51 connected to the shaft hole 31 of the valve stem, and is mounted on the valve stem.

It is equipped with the valve stem 3, the injection valve, the liquid suction valve, the elastic metering bag, and the push button as described above, and the elastic metering bag 4 is opened by pressing down the push button 5.
Dispensing containers are known which are capable of dispensing a solution therein.

By the way, in this invention, in the above-mentioned known metering injection container, a thick collar 41 is provided on the elastic metering bag 4, and a lock pin 61 is installed in the presser ring 6 of the collar 41. The peripheral edge of the cap 7, to which the valve housing 2 is attached and the lock pin 61 is passed through, is fastened and fixed to the rim 11 of the container 1 via the retaining ring 6 and the collar 41. Further, according to this invention, a vertical pleat 53 is provided in the cavity 52 formed on the lower surface of the push button 5, and a lock pin 61 corresponding to the raised position of the valve stem 3 is provided in the vertical pleat 53. A receiving surface 54 is formed.

This device is constructed as described above, and the elastic metering bag 4 is provided with a thick brim 41, and at the same time, a lock pin 61 is installed in the presser ring 6 of the brim 41. However, the cap 7 with the valve housing 2 attached has the lock pin 61 penetrated, and its periphery is attached to the container 1 via the retaining ring 6 and the collar 41.
The brim 41, which is receiving this tightening pressure, is tightened and fixed to the mouth rim 11 of the container 1 and the cap 7.
At the same time, the flange 41 acts as an effective sealing means and applies pressure toward the center, which increases the tightness between the opening edge 42 of the elastic metering bag 4 and the circumferential surface of the valve housing 2. Leakage of the internal pressure of the container can be completely prevented with a simple mechanism without providing a sealing member such as the above.

Further, according to this invention, a vertical pleat 53 is provided in the hollow portion 52 of the lower surface of the push button 5 which is attached to the valve stem 3, and this vertical pleat 53 has the following features:
Since the receiving surface 54 of the lock pin 61 is formed to correspond to the raised position of the valve stem 3 shown in the figure, the push button 5 may be pressed down by mistake in the illustrated position, or unexpected external pressure may be applied to the push button 5. Since the valve stem 3 does not make a downward stroke even if the fuel is applied to the fuel, accidental injection by mistake is reliably prevented.

With any injection device, measures to prevent erroneous injection are an issue from the perspective of preventing unnecessary wastage of the solution, but especially when the purpose is to spray a fixed amount, strict measures must be taken for each injection operation for pharmaceuticals and other items. Quantitative nature is often required. However, when using a quantitative bag with a relatively large capacity as the metering means as in this invention, if the contents of the bag are consumed due to incorrect injection, it will take some time to replenish the bag. Quantification of the ejected material after immediate re-operation is inaccurate and unreliable. Therefore, being able to reliably prevent erroneous injection is particularly useful for metered dose injection containers that use metered dose bags.

In this invention, in order to perform a desired injection, the push button 5 is rotated by an appropriate angle with the tip of a finger and then the push button is pressed. As mentioned above, the valve stem 3 is rotatably inserted into the shaft, and the push button 5 is mounted on the valve stem 3, so that the push button 5 can rotate together with the valve stem 3. When the push button 5 rotates, the receiving surface 54 of the vertical pleat 53 moves out of the position of the lock pin 61, so if the push button 5 is pressed at that time, the lock pin 61 is positioned within the cavity 52 of the push button 5. Therefore, the valve stem 3 moves downward together with the push button 5, opening the injection valve and closing the liquid supply valve, thus opening the valve chamber 2.
The liquid contained in the elastic metering bag 4 connected to the container 1 is pushed out by the pressure of the propellant through the bag wall, and is injected from the injection port 51.

When the push button 5 is released, the valve stem 3 rises, the injection valve described above closes, and the replenishment valve opens. At this time, the pressure inside and outside of the elastic metering bag 4 becomes equal through the replenishment valve and the valve chamber 21, but since the elastic metering bag 4 has self-righting properties, the solution in the container 1 is sucked through the liquid suction pipe 22. raised,
It is sucked into the elastic metering bag 4. At the end of the required injection, the receiving surface 54 of the vertical pleat 53 touches the locking pin 61.
It goes without saying that the push button 5 should be rotated in the opposite direction so that it is in the corresponding position. In the illustrated example, the hollow portion 52 of the push button 5 has vertical folds 53.
A separate vertical fold 55 is provided, and a stopper pin 62 is installed in the presser ring 6 in addition to the lock pin 61 described above. These vertical folds 55 and stopper pin 62 are means for preventing more than necessary rotation when rotating the push button 5 as described above.

(Effect of the invention) That is, according to this invention, the collar 4 of the elastic metering bag
1 is tightened to the crown lid 7, and serves as an effective means for sealing the inside and outside of the container 1. At the same time, it serves as a means for tightly contacting the mouth 42 of the elastic metering bag 4 with the valve housing 2, preventing leakage. A metering injection container with a simple mechanism that can be used as a metering injection device and prevents erroneous injection at an undesired time is provided, and its practical benefits are great.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of the essential parts of an embodiment of this invention when not in operation, and FIG. 2 is a longitudinal cross-sectional view of the essential parts of the assembly of the same embodiment before it is attached to a container. 1 is a container, 11 is a lip, 2 is a valve housing, 21 is a valve chamber, 22 is a liquid suction pipe, 23 is a through hole, 3 is a valve stem, 31 is a shaft hole, 32 is a side hole, 4 is an elastic metering bag ,
41 is a brim, 42 is a lip, 5 is a push button, 51 is an injection port, 52 is a cavity, 53 and 55 are vertical folds, 5
4 is the receiving surface, 6 is the holding ring, 61 is the lock pin,
62 is a stopper pin, 7 is a cap, 81 and 84 are springs, 82 is an elastic gasket, and 83 is a cap-shaped elastic valve.

Claims (1)

[Scope of utility model registration request] A valve stem 3 has a shaft hole 31 for an injection passage and is tightly supported in a valve housing 2 for vertical stroke and rotation, which is fixed to the mouth rim 11 of a container 1 containing a solution under pressure of an insoluble gas. , an injection valve that opens a passage between the upper part of the valve chamber 21 and the shaft hole 31 in the lowered position of the valve stem 3 and closes this passage in the lowered position of the valve stem 3; A liquid suction valve that closes a passage with the connected liquid suction pipe 22 and opens this passage in its raised position, an elastic metering bag 4 tightly connected to the valve chamber 21 in the container 1, and the shaft hole 3.
1 and a push button 5 mounted on a valve stem 3, the metering injection container is capable of injecting the solution in the elastic metering bag 4 by pressing down the push button 5. In addition, a thick collar 41 is provided on the mouth edge 41 of the elastic metering bag 4, and a lock pin 61 is attached to the presser ring 6 of the collar 41.
The valve casing 2 is attached to the periphery of the cap 7 through which the lock pin 61 has been passed, and then the rim 11 of the container is pressed through the retaining ring 6 and the flange 41.
The hollow part 52 formed on the lower surface of the push button 5 is provided with vertical pleats 53, and the valve stem 3 is tightened and fixed.
The receiving surface 54 of the lock pin 61 corresponds to the raised position of
A metered injection container that prevents accidental injection and is formed by forming vertical pleats 53.