JPS5924864B2 - Chemical liquid injection device for aerosol spray container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chemical liquid injection device for an aerosol spray container, in which a chemical liquid such as a drug or paint in the container is ejected by compressed gas such as carbon dioxide gas sealed in the container. .

As shown in Fig. 1, in a conventional aerosol spray container, a vertically movable stem with a push button at the upper end is attached to a spring hook, passing through a valve housing provided on the lower surface of a top plate that fits over the upper edge of the container. The valve mechanism is configured to close the flow path leading to the injection hole of the push button via a valve mechanism consisting of a rubber ring that is always pushed up and fitted to the stem, but this structure is complex and expensive to manufacture. It was also inconvenient that the load was concentrated from the bottom of the stem to the rubber ring during operation, making it more likely to break down.

Therefore, an injection device as shown in FIG. 2 was also considered.

That is, 1 is a top plate that fits over the rim of a desired spray container, and 2 is a cap-shaped push button member made of soft rubber, which has an injection hole 3 formed through the top of its circumferential surface. This push button member 2 is fixedly erected by inserting and tightening its base end into the center hole of the top plate 1, and a liquid absorbing and closing member 4 is fitted and fixed inside. With this configuration, when the top plate 1 is attached to the spray container and used, the inner circumferential surface of the push button member 2 and the circumferential surface of the liquid suction tube-cum-closing member 4 are always in close contact with each other to close the injection hole 3. However, when the top surface of the push button member 2 is pressed down,
The circumferential surface of the push button member 2 expands outward, and a gap is created between it and the liquid suction pipe/closing member 4. As a result, the chemical solution filling the inner part of the push button member 2 is directed to the injection hole through the gap. It can be ejected from 3. Next, FIG. 3 shows a modification of FIG. 2, in which the liquid suction pipe 4' is not directly attached to the inside of the push button member 2' installed upright on the top plate 1', and the upper end A cap-shaped closing member 5' made of a closed hard material is inserted.

This closing member 5' is provided with a brim-like stepped portion 6'.
A child LT' is provided transparently. A gap is previously formed between the injection hole 3' of the push button member 2' and the closing member 5'. With this configuration, when the top surface of the push button member 2' is pressed down, the circumferential surface of the push button member 2 expands outward, and the medicinal liquid is released.
fLT' to the inner part of the push button member 2', and the injection hole 3
``Gushes outward from '.

In this embodiment, the sealing of the chemical liquid when not in use is carried out at the injection hole 3.
Since this is carried out at the stepped portion 6 located at a lower position, there is an advantage that the above-mentioned rolling down can be performed without pushing from directly above. In the example shown in Figs. 2 and 3, the injection holes 3 and 3' are provided in a soft part, so there is a risk of deformation during rolling, so the injection holes should be made slightly vertical in advance. It is necessary to consider the following. FIG. 4 shows a practical example of the present invention, and shows an example in which a closing member that comes into pressure contact with the inside of the push button member is provided on the push button member side.

That is, in FIG. 4A, 1'' is the top plate, 2'' is the push button member, 31 is the injection hole, and 4'' is the liquid suction pipe. In this practical example, the top of the push button member 2'' is separate. It is formed by sandwiching a metal or hard resin top member 5'', and a closing member 7'' with a bulging edge at the lower end is sandwiched in a vertical hole 6'' formed through the top member 5'', leaving a passage 8''. This passage is 8″
is in communication with the injection hole 3''. With this configuration, the
As shown in FIG. 4A, the inner peripheral surface of the pushbutton member 2'' is in pressure contact with the closing member 7'', but when pressed down as shown in FIG. 4B, the underline of the closing member 7 and the pushbutton member 2 A gap is created between the two and the chemical liquid passes through the passage 8'' and is ejected from the injection hole 3''.

FIG. 4C shows a case where the closure member 7'' and the top member 5'' are made integrally. In the present invention shown in FIG. 4, the injection holes 3'' are provided in the top member 5'' which is a hard body, so there is no risk of deformation. In other words, in the case of Figures 1 and 2, since the injection holes 3 and 3' are provided in the soft part, they will deform into a slightly horizontally elongated state when rolled down, so it is necessary to make the injection holes slightly vertically in advance. However, in the case of this invention shown in FIG. 4, the strength of the rolling blade, the degree of tilting in the rolling direction, etc. can be taken into account. As explained above, the structure of this invention is extremely simple and can be manufactured at low cost.In addition, since the push button member is fixed to the top plate compared to conventional lift buttons, there is no risk of breakage, etc., and the injection hole is fixed. It has many advantages, such as no deformation and reliable operation of the device.

[Brief explanation of drawings]

Figures 1, 2, and 3 are cross-sectional views showing conventional examples;
FIG. 4A is a sectional view showing a practical example of the present invention, FIG. 4B is a view showing the same operating state, and FIG. 4C is a view showing another modification. Symbols in the figure: 1, 1', 1'' are the top plate, 2, 2', 2'' are the push button members, 3, 3', 3'' are the injection holes, 4 is the liquid suction pipe closing member, 5', 7I each indicates a closing member.

Claims (1)

[Claims] 1. A button member 2'' made of a soft cylindrical member protruding from the center of the upper surface of a top plate 1'' that fits into the injection container has a separate top member 5'' made of a hard material having an injection hole 3'', A closing member 7'' having a bulging edge at the lower end is held in a vertical hole 6'' provided through the top member 5'', leaving a passage 8'' leading to the injection hole 3''. Chemical liquid injection device for aerosol spray container.