JPS594763Y2 - Liquid absorption device for aerosol injector that can be used upside down - Google Patents

Description

[Detailed description of the invention] This invention relates to an improvement of an aerosol injection device that can reliably perform solution injection operations even when the injection container is tipped over. The purpose is to provide something with a simple structure that can be used tomorrow.

There are many cases where you want to use the spray nozzle of an aerosol container close to the floor, such as when spraying insecticides in the corners of the floor of a house or deep under a refrigerator, but commercially available aerosol containers I can hardly find anything that fits that purpose.

On the other hand, several aerosol injection devices suitable for this purpose have been proposed in the literature, but all of them have complicated structures and high production costs, and the weight, which is the power member that transforms the liquid suction flow path, is minute. Therefore, it was inevitable that the operation would be uncertain.

This idea eliminates the above-mentioned drawbacks of the conventional technology, has a simple structure, is easy to mass-produce, and is capable of accurately converting the liquid suction flow path between upright and inverted positions. The invention will be explained by way of example.

That is, 1 is an elastic packing, and the upper edge of the valve housing 2 is connected to the mountain cap 3 of the aerosol container via the elastic packing 1.
is attached to.

Reference numeral 4 denotes a bottomed hollow valve lever having a side hole 41. The valve lever 4 is inserted through an elastic packing 1 and elastically supported by a spring 5, and the side hole 41, which is a part of the valve lever 4, is connected to the elastic packing. 1 constitutes an injection valve.

Reference numeral 6 indicates a liquid suction pipe, and in the illustrated example, the upper piece 61. It consists of an elastic connecting tube 62 and a tubular weight 63.

The connecting tube 62 is made of an elastic tube so that it can bend in response to the inclination of the entire device, and the lower end of the liquid suction tube 6 can easily move to the lower side.The reason why the weight 63 is made into a tubular shape is that the weight This is because it is convenient to wear.

Note that, if necessary, the shape and mounting position of the weight are arbitrary.

In this invention, the diameter of the top end of the liquid suction pipe 6, that is, the top end of the upper piece 61 in the illustrated example is enlarged, and the enlarged portion 6
The annular lower surface of 4 forms a spherical cutout surface 65.

On the other hand, a concave spherical head seat 22 is formed on the upper peripheral surface of the opening provided in the bottom wall 21 of the valve housing 2, and this concave spherical head seat 22 allows the aforementioned enlarged portion 64 of the liquid suction pipe 6 to slide. The liquid suction pipe 6 is supported and thus connected to the valve housing 2.

Furthermore, a free movement space 23 for the enlarged portion 64 is provided above the bottom wall 21 .

In the illustrated example, the upper end of this free space 23 is limited by a washer 51 that supports the spring 5.

The cross groove 66 is provided at the top of the enlarged portion 64 so that when the top surface of the enlarged portion 64 engages with the washer 51, communication between the floating space 23 and the valve chamber 271 above the washer 51 is cut off. This is to prevent

This device is constructed as described above, and the liquid suction pipe 6 is separated and independent from the valve housing 2, but a weight 63 is attached to the liquid suction pipe 6, and the expanded portion 64 of the liquid suction pipe 6 has a ball-shaped hole. Since the surface 65 is seated on the concave spherical head seat 22 having the same diameter, the liquid suction pipe 6 is completely connected to the valve housing 2 by this seating.

Therefore, if the valve rod 4 is pressed in the upright position shown in FIG. 1, the injection valve will open and the injection solution under pressure of liquefied gas will fill the liquid suction pipe 6, the valve chamber 24, and the above-mentioned injection valve. It is sprayed from a nozzle (not shown).

Since the liquid suction pipe 6 is connected to the valve housing 2, the gas inside the container does not enter the valve housing 2 during the above-mentioned injection operation, and therefore only the gas is lost during injection. There is no.

Aerosol containers are often used tilted rather than completely upright.

By the way, a weight 6 is attached to the liquid suction pipe 6 of the device according to this invention.
3 is attached, and the spherical cutout surface of the enlarged portion 64 of the liquid suction tube is seated on the concave spherical head seat 22 of the valve housing, so if the container is tilted, the valve housing 2 will be tilted, but the liquid suction tube 6 will be While maintaining the vertical state, slipping occurs between the ball notch surface 65 and the concave ball head seat 22, but a good connection state is still maintained between the valve housing 2 and the liquid suction pipe 6, and therefore, Even when the container is used in a tilted position, the spray is as good as when it is in an upright position.

In addition, in the illustrated example, the lower part of the bottom wall 21 of the valve housing 2 is opened in a funnel shape because the bottom wall 21 is thick, so that even if the device is tilted, the operation of the upper piece 61 is not hindered. This is a measure for this purpose.

Next, above the bottom wall 21 of the valve housing 2, there is a floating space 23.
Since this is provided, when the device is turned upside down, the enlarged portion 64 of the liquid suction tube 6 separates from the concave ball head seat 22, and a gap is created around the enlarged portion 64.

Since the valve housing 2 is immersed in the liquid due to the vertical fall, the liquid fills the valve chamber 24 through the gap created here.

Since the internal pressure of the liquid and the gas pressure at the intake port of the liquid suction pipe 6 are equal to each other, no gas enters the liquid suction pipe 6.

Thus, when the valve rod 4 is operated, the liquid in the valve chamber 24 is injected, and the liquid is replenished into the valve chamber 24 through the above-mentioned gap, so that normal injection continues.

The operation of this invention has been described in detail above, and as can be seen from the above, according to this invention, the spherical cutout surface 65 formed in the enlarged portion 64 of the liquid suction pipe 6 and the valve housing 2 on which it is seated. The concave ball head seat 22 constitutes a switching valve for the passage of replenishment liquid to the valve chamber 24 in the case of upright use and inverted use.

In addition, this switching valve has a function of continuously maintaining the sealing force of the switching valve when the container is used with the container tilted.

Thus, according to this invention, when the container is in the upright or inverted state, the liquid suction flow path to the valve chamber is switched and normal injection is performed, but the heavy weight that is the power source for this switching operation is Since the weight is attached to the suction tube, its size and weight can be designed to be as large as necessary, so that the switching operation described above is extremely accurate and the structure is simple.

Also, sometimes when used in an inclined position, the suction pipe remains vertical and the intake port of the suction pipe moves deeper into the liquid. Gas enters from the intake port, causing abnormal injection conditions, and
Therefore, there is no drawback such as rapid gas consumption.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of an embodiment of this invention, FIG. 2 is a plan view of the upper piece, and FIG. 3 is a longitudinal sectional view of the same. 1 is an elastic packing, 2 is a valve housing, 21 is a bottom wall, 22 is a concave ball head seat, 23 is a floating space, 24 is a valve chamber, 3 is a mountain cap, 4 is a valve lever, 41 is a side hole, 42 is an injection aisle,
5 is a spring, 51 is a washer, 6 is a liquid suction pipe, 61 is an upper piece, 62 is a connecting pipe, 63 is a weight, 64 is an enlarged part, 6
5 is a spherical cutout surface, and 66 is a cross groove.

Claims (1)

[Scope of utility model registration request] Fit the upper edge of the valve housing 2 to the mountain cap 3 via the elastic packing 1, connect the liquid suction pipe 6 to the bottom of the valve housing 2, and attach the hollow valve rod 4, which is elastically supported by the spring 5, to the elastic packing. In an aerosol injector in which an injection valve is formed by inserting the elastic packing 1 and a part of the valve rod 4, an enlarged part 64 is provided in which the diameter of the top end of the liquid suction pipe 6 is enlarged, and a ball is formed on the annular lower surface of the enlarged part 64. Missing surface 6
5, a weight 63 is attached to the liquid suction pipe 6, and a concave spherical head seat 22 having the same diameter as the spherical cutout surface 65 is formed on the circumferential surface of the bottom opening of the valve housing 2. A liquid absorption device for an aerosol injector, in which a spherical cutout surface 65 is seated and a free movement space 23 of the enlarged portion 64 is provided above the bottom wall 21 of the valve housing 2.