JPS6233148B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an aerosol device in which a stem is pushed down to eject a solution and, at the same time, liquefied gas from an internal container contained in the injection container is replenished into the injection container.

Conventionally, an internal container inside an injection container is filled with liquefied gas, and when this internal container is attached to the injection container, it is necessary to cool and fill the container, which is time-consuming and poses a risk of gas leakage. In addition, the inner container itself requires a valve device, resulting in a complicated structure and high cost.As a means of solving these drawbacks, the present applicant has proposed an aerosol device as shown in FIG. ) is proposed.

To explain this simply, when filling with liquefied gas, the stem 6 of the injection container 1 is pushed down and the liquefied gas is pumped from the elastic valve 23 into the inner container via the passage hole 9, the passage hole 10, the cavity 12, and the passage hole 22. 14, and then this pressurized liquefied gas is passed through the gaps 27,
The undiluted solution flows into the injection container 1, which is previously stored, through the elastic valve 29, and when the internal pressure of the injection container 1 decreases due to the injection of the undiluted solution, the elastic valve 23 operates to replenish the liquefied gas in the internal container 14. It is something to do. The aerosol device described above can fill the injection container 1 and the internal container 14 with gas in the same operation, and maintains a substantially constant gas pressure inside the injection container 1 without disrupting the composition of the injection liquid. It has special features.

However, the spring 13 that biases the stem 6 upward is constantly immersed in the sprayed liquid during use, and there is a risk that the action of the spring will be weakened due to rust formation or solidification of the sprayed liquid, and the spring 13 may become liquefied. There were some areas that required improvement, such as the need for a ball valve 17 to fill with gas.

This invention was made in view of the above circumstances,
The aim is to overcome the drawbacks of the prior art and to provide an aerosol device that can be operated smoothly without being affected by the contents.

The following Figures 2 to 4 show the first embodiment of this invention.
This will be explained in detail based on the figures.

Reference numeral 31 in the drawing designates an injection container, and an elastic packing 34 having a hole 33 in the center is in contact with the inside of the mouth 32 of the injection container 31.
has a smaller diameter than the opening 35 of the mouth portion 32, and a stem 36 is fitted into this hole 33 in a vertically movable manner and in a liquid-tight manner. This stem 36 is provided with a stepped portion 37 at its lower part, a passage hole 39 provided at the center, a through hole 39 at the lower end, and an opening 40 at the upper end.

On the other hand, a housing 41 whose upper end is in close contact with the gasket 34 is provided inside the mouth 32, and the housing 41 includes an outer cylinder 42 and an inner cylinder 43 inserted into the outer cylinder 42 with a gap therebetween. And this outer cylinder 4
2 and a closing plate 45 that integrally closes the lower end of the inner cylinder 43 and has a communication hole 44 in the center. This outer cylinder 42 is liquid-tightly attached to the mouth part 32 with its upper end in contact with the gasket 34, and a liquid supply hole 46 is provided in a part (lower part in the illustrated example) of the outer cylinder 42. It has a structure in which it communicates with the vicinity of the bottom of the injection container 31 through a liquid supply tube 48 attached to a mounting ring 47 provided around it. In addition, the housing 41
The inner cylinder 43 has an upper end that is appropriately shorter than the outer cylinder 42 and faces the gasket 34 with a gap therebetween.
A spring 49 is inserted into the lower part of the inner cylinder 43, and its lower end is supported by the closing plate 45.
A holder 50 is placed above this spring 49 with a space between it and the inner wall surface of the inner cylinder 43. This holder 50 is urged upward by the spring 49, and the stem 38 is placed in the center of the holder 50. A bottomed hole 51 having a larger diameter than the lower end is formed to receive the lower end. An elastic packing 53 is mounted on the inner cylinder 43 and the holder 50, and is fitted to the stem 38 in a liquid-tight and slidable manner.

A piece body 54 is inserted between this elastic packing 53 and a packing 34 provided inside the mouth portion 32, and this piece body 54 is formed approximately in a ring shape, and the stem 38 is attached to the center portion. A through hole 55 is formed into which the
A projecting edge 56 is formed in the vicinity of the lower opening of the elastic packing 53 in liquid-tight contact with the elastic packing 53, and a plurality of protrusions 57 contacting the elastic packing 53 are formed radially outward. There is.

Furthermore, an internal container 59 is attached below the housing 41 and has an opening 58 that communicates with the communication hole 44 of the closing plate 45, and a replenishment hole 60 that communicates with the inside of the injection container 31 is formed in the opening 58. An elastic valve 61 is provided outside the replenishment hole 60 to close the replenishment hole 60 at all times and to be opened by internal pressure.

Further, reference numeral 62 is a push button for operating the stem 36 and spouting out the contents, and reference numeral 63 shown in FIG.
is a gas filling nozzle used for gas filling, and this gas filling nozzle 63 is attached to the stem 3 shown in FIG.
It has a shape similar to 6, and a stepped portion 64 is formed,
A passage hole 65 passing through the upper and lower ends is formed in the center, and a through hole 66 is formed in the lower end.

Hereinafter, the operation of this invention configured as described above will be explained. To fill the internal container 59 with liquefied gas, use a gas filling nozzle 63 shown in FIG.
is inserted from above in place of the stem 36 shown in FIG. 2, the holder 50 is pushed down, the elastic packing 53 is deformed by the stepped portion 64 as shown in FIG. 3, and the filling device (not shown) is inserted. Liquefied gas is sent in the direction of arrows A, B, and C. At this time, as the pressure in the internal container 59 increases, the elastic valve 6
1 operates, and liquefied gas is sent into the injection container 31 from the supply hole 60. However, when the liquefied gas is initially filled, the inside of the injection container 31 is already almost filled with the liquid, and the filling of the liquefied gas into the injection container 31 ends almost at the same time as the filling of the internal container 59 with the liquefied gas. When the gas filling nozzle 63 is pulled out from the state shown in FIG. 3, the gas in the inner container 59 is kept sealed by the step 37 of the stem 36, the elastic packing 53, and the protrusion 57 of the piece 54, as shown in FIG. It will not be released. Injection container 3
The same applies to the contents of No. 1. In addition, the inner container 59 and the injection container 31 include an elastic valve 61 and an inner cylinder 43.
and elastic packing 53, respectively. After filling with liquefied gas, the gas filling nozzle 63 is removed and the above-mentioned stem 36 is installed in its place.

In normal use, that is, when injecting the contents inside the injection container 31, press the push button 62 as shown in FIG.
The stem 36 is pushed down through the step 37 to elastically deform the elastic packing 53 downward, thereby forming a gap with the protruding edge 56 of the piece 54. As a result of this operation, the contents in the injection container 31 are transferred by gas pressure to the liquid supply tube 48,
Liquid supply hole 46, gap between protrusion 57, elastic packing 53
and the gap between the protruding edge 56, the through hole 39, the passage hole 38,
They pass through the openings 40 in order and are taken out.

If you stop pushing the stem 36, the inner container 5
9 and the biasing force of the spring 49, the holder 50 is pushed up and the elastic packing 5 is pressed again.
3 and the protruding edge 56 come into close contact and form a seal, so that the injection of the contents is stopped.

Further, when the contents in the injection container 31 gradually decrease due to injection and the gas pressure decreases, the elastic valve 61 of the inner container 59 opens and gas is replenished, and the pressure difference between the inside of the inner container 59 and the inside of the injection container 31 is reduced. When the internal container 59 is exhausted, the elastic valve 61 closes due to the elastic force, and the liquefied gas in the internal container 59 is automatically vaporized as the contents decrease, and the pressure is maintained at a substantially constant pressure.

In addition, FIG. 5 shows a second embodiment of the present invention, in which a stem 3 in which the stem 36 and holder 50 of the first embodiment shown in FIGS. 2 to 4 are integrated.
6' is provided. In this second embodiment, the normal injection operation is similar to that shown in FIG. 4, but the feature is that the gas filling nozzle shown in FIG. 3 is not required. When filling the liquefied gas through the stem 36', as shown in FIG.
9 is pushed down until it is positioned below the elastic packing 53, thereby communicating the passage hole 38 of the stem 36', the communication hole 44 of the housing 41, and the inner container 59. Stem 3 after filling with liquefied gas
6' is used within the range where the through hole 39 is located above the elastic packing 53, and the stem 3
Consideration may be taken such as limiting the gap between the mouth portion 32 of the injection container 31 and the push button 62 so that the button 6' is not pushed down more than necessary.

Further, in the first embodiment, the protrusion 52 was formed on the inner bottom of the bottomed hole 51 of the holder 50, but it may be omitted when the gas filling nozzle 63 has a through hole 66 as shown in FIG. If the passage hole 66 is not provided, the gas is filled from the lower opening of the passage hole 65 through the gap between the gas filling nozzle 63 and the bottomed hole 51. As described above, the detailed shapes in the illustrated examples can be modified without departing from the spirit of the invention.

As detailed above, this invention efficiently fills the internal container with liquefied gas directly into the gas filling gap, replenishes the vaporized gas into the injection container via an elastic valve as necessary, and maintains a nearly constant pressure. For example, even if the foam content is powdery, such as shaving cream or face pack, it is possible to spray a stable content without changing the foaming ratio, and the content will not seep into the spring part. It has advantages such as being able to operate smoothly without being affected by rust formation or solidification of contents, and having a simple structure and operation since it does not require a ball valve for filling liquefied gas.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view showing the applicant's conventional example, Fig. 2 is a longitudinal sectional front view showing an embodiment of the present invention, and Fig. 3 is a longitudinal sectional front view of the main part for explaining gas filling. FIG. 4 is a longitudinal sectional front view of the main parts for explaining the state of use thereof, and FIG. 5 is a longitudinal sectional front view of the main parts showing a second embodiment of the invention. 31... Injection container, 36, 36'... Stem,
37... Stepped portion, 38... Passage hole, 39... Through hole,
41...Housing, 42...Outer cylinder, 43...Inner cylinder, 44...Communication hole, 45...Closing plate, 46...
Liquid supply hole, 49... Spring, 53... Elastic packing, 54... Piece body, 59... Inner container, 61...
...elastic valve.

Claims (1)

[Claims] 1. A housing having an outer cylinder and an inner cylinder whose lower side is closed by a closing plate having a communication hole and a liquid supply hole is installed in the injection container in a liquid-tight manner, and a stem is attached to the inner cylinder of the housing with an elastic packing. provided vertically movably and liquid-tightly protruding from the outside of the injection container,
The stem is formed with a stepped portion for elastically deforming the elastic packing downward, a passage hole communicating with the outside, and a passage hole communicating with the passage hole and the inside of the outer cylinder of the housing, and the stem is inserted into the inner cylinder. A spring is provided that is always biased upward, and a bridge body is provided above the housing that creates a gap with the elastic packing when the elastic packing is elastically deformed downward, thereby allowing communication between the through hole of the stem and the liquid supply hole of the housing. . An aerosol device, wherein an inner container is provided in the closing plate of the housing and has an elastic valve that communicates with the communication hole and opens when the internal pressure becomes high.