JP2000176330A - Aerosol valve enabling two-stage ejection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable two-stage changeover of small-quantity quantitative ejection and large-quantity continuous ejection in an aerosol product. SOLUTION: All aerosol valve has a valve housing 21 which is attached to an aerosol container and opened toward the aerosol container on the base part side thereof and opened toward the outside on the leading end side thereof, the stem fitted to a gasket airtightly and operable toward the interior of the aerosol container and a valve member 31 having a first flow passage allowing the stem and the interior of the aerosol container to communicate with each other at a time of non-ejection and closed when the stem is operated little toward the interior of the aerosol container and a second flow passage opened when the stem is further largely operated toward the interior of the aerosol container. When the stem is operated little, a filled substance present within the valve housing between the stem and the valve member is ejected and, when the stem is further largely operated, the filled substance in the aerosol container is ejected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aerosol valve which can be switched in two stages, a small quantity fixed quantity injection and a large quantity continuous injection.

[0002]

2. Description of the Related Art Aerosol containers are used in a wide variety of fields such as hair cosmetics, home cosmetics, paints, etc. because of their good usability. The aerosol container is closed by an aerosol valve, and when used, the stem is pushed down by an actuator / spray nozzle, usually called a top button, and the aerosol valve is opened, and the aerosol filling becomes a mist, foam, etc. Injected in shape. Therefore, the injection-non-injection (ON-OFF) of the aerosol filling is related to whether or not a flow path to the outside of the aerosol filling is formed only by the depression operation of the stem, and the operation that can be realized is the aerosol filling. It is only the injection of the filler, and the injection amount cannot be adjusted.

However, on the other hand, there are many demands for adjusting the injection amount. It is desirable that the injection adjustment be performed continuously during normal injection operation with one hand without the need to replace the attachment. In addition, such a request,
For example, in the case of hair cosmetics and paints, a large amount may be sprayed at the beginning of spraying to adjust the overall shape, and thereafter, finishing may be performed by spraying a small amount. In addition, a large amount of continuous injection may be performed after a small amount of injection. In order to respond to the above demands, injection quantity control valves have been proposed in the past, for example, there are the following, all of which increase the complexity of the valve mechanism, increase the number of parts, increase costs and decrease reliability. Is generated.

(1) Japanese Patent Application Laid-Open No. 8-187455: In addition to a suction path for an aerosol filler (liquid phase), a discharge path for a gas phase existing in an aerosol container is provided. By controlling the opening and closing, the discharge ratio of the liquid phase and the gaseous phase is adjusted, and the injection amount of the aerosol filling which is the liquid phase is adjusted. (2) Actual registration 3029866: In addition to the stem valve mechanism using a normal gasket, a second valve mechanism using a valve rod and a second gasket is provided below the stem, and the second valve mechanism is controlled by the amount of stem depression. The opening and closing are controlled to adjust the injection amount.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide an aerosol valve capable of performing both small quantity fixed injection and large quantity continuous injection.

[0006]

The aerosol valve of the present invention, which is capable of two-stage injection, is hermetically attached to an aerosol container and ejects the aerosol high-pressure filling in the aerosol container by ejecting the aerosol high-pressure filling to the outside. A valve housing, attached to the aerosol container, having a base side opening toward the inside of the aerosol container and a front end side opening to the outside; a valve housing disposed at the front end side of the valve housing, wherein the valve housing is provided at the time of non-injection. A gasket that keeps airtightness with respect to the aerosol container; a gasket that is fitted airtightly with respect to the gasket, has a base side housed in the valve housing, and has a jet flow path that is exposed to the outside at the tip end side, and the gasket is bent It has a communication passage that enables communication between the ejection flow path and the inside of the valve housing, and A stem that can be actuated; housed in the valve housing; urges and presses the stem against the gasket during non-injection to close the communication passage of the stem with the gasket; A first elastic member for opening the communication passage with respect to the inside of the valve housing; and a stem and the inside of the aerosol container communicating with each other at the time of non-injection, and are closed when the stem is operated small toward the inside of the aerosol container. A valve member having a first flow passage having a first flow passage, and a second flow passage which is further opened when the stem is actuated toward the inside of the aerosol container; A second elastic member for urging in a closing direction, wherein when the stem is operated small, the second elastic member is located in the valve housing and between the stem and the valve member. That the charge was injected, when the larger actuating the stem is characterized in that to allow the injection of the filling inside the aerosol container.

[0007]

FIG. 1 is a sectional view showing an embodiment of an aerosol valve according to the present invention, showing a state in which an aerosol container is closed. Fig. 2 shows a small amount of the same aerosol valve.
FIG. 3 shows the time of the constant injection, and FIG. 3 shows the time of the large amount / continuous injection. FIG. 7 is a sectional view taken along line AA of FIG. The aerosol valve shown in FIG.
, A gasket 13, a stem 23, a valve member 31,
A coil-shaped upper spring 27 (first elastic member),
A coil-shaped lower spring (second elastic member) 35;
O-ring 3 made of a flexible material such as rubber or plastic
3 (packing: sealing member) and support the lower spring,
The connecting member 41 opens toward the inside of the aerosol container or connects the dip tube.

Above the valve member 31 and between the stem 23 and the valve housing 21, there is formed an upper chamber 51 which functions as a storage chamber and also functions as a flow passage. Below the valve member 31 and below the valve housing 21, a lower chamber 53 communicating with the aerosol container is formed. As shown in FIGS. 1 and 7, the valve member 31 has a first valve flow path 6 that connects the upper chamber 51 and the lower chamber 53 in the state of FIG. 1.
1 and the O-ring 33, the upper chamber 51 and the lower chamber 53
An upper second valve flow path 63a and a lower second valve flow path 63b whose communication path between them is blocked.

In the state shown in FIG. 1, that is, in the closed state, that is, when the aerosol product is not used, the aerosol filler pressurized by the propellant releases the upper chamber 51 and the lower chamber 5.
3 is filled, but the gasket 13
Is closed, so it does not squirt outside. The upper chamber 51 and the lower chamber 53 (that is, the inside of the aerosol container) communicate with each other. When the stem is slightly depressed from the state of FIG. 1, the state of FIG. 2 is obtained, and when the stem is further depressed, the state of FIG. 3 is obtained.

The state shown in FIG. 2 shows a fixed amount and small amount injection state. When the stem 23 is pushed down slightly, the stem 23 is pushed down against the upper spring, the gasket 13 is bent and deformed, and the communication passage 25 opens to the outside.
At this time, as the stem 23 descends, the lower taper portion 23a of the stem 23 and the upper taper portion 31a of the valve member 31
Are brought into contact with each other to form an airtight state, and the space between the first flow passage 61 and the upper chamber 51 is shut off. Further, the valve member 31 is urged upward by the lower spring 35 so that the valve housing 2
The upper second flow passage 63a and the lower second flow passage 63b are shut off by the O-ring 33 pressed against the tapered portion of the valve housing 21 and pressed against the tapered portion of the valve housing 21. Therefore, the lower chamber 53 communicating with the inside of the aerosol container is not open to the outside. On the other hand, the upper chamber 51 is opened to the outside through the communication passage 25, and the upper chamber 5 is opened.
The aerosol composition containing the propellant (propellant) filled in 1 is ejected from the ejection port 29 to the outside. This is a constant and small amount injection state.

The state of FIG. 3 shows a state of a large amount and continuous injection. When the stem 23 is further pushed down, the stem 23 descends against the lower spring 35. As a result, the O-ring 33 descends to lose its sealing effect, and the lower second
The flow passage 63b communicates with the upper second flow passage 63a, and the filling in the aerosol container flows from the lower chamber 53 to the lower second flow passage 63b, the upper second flow passage 63a, the upper chamber 51, and the communication passage 2.
5. Injected to the outside through the ejection port 29. This is a large, continuous jet.

FIG. 4 is a sectional view showing an embodiment of the aerosol valve of the present invention, showing a state in which the aerosol container is closed. FIG. 5 shows the same aerosol valve at the time of small quantity and constant quantity injection, and FIG. 6 shows the same quantity at the time of large quantity and continuous injection. The aerosol valve shown in FIG. 1 includes a valve housing 21, a gasket 13, a stem 23, a valve member 31, a coiled upper spring 27 (first elastic member), and a coiled lower spring (first elastic member). 2 elastic member) 35 and a lower spring, and open toward the aerosol container.
Alternatively, a connecting member 4 for connecting the dip tube
1 and is hermetically attached to the aerosol container by the mounting cap 11.

A first embodiment of the invention shown in FIGS.
The second embodiment of the present invention shown in FIGS. 4 to 6 is different from the second embodiment of the present invention only in the sealing structure between the upper chamber 51 and the lower chamber 53 during small-quantity / quantity injection, and other configurations are the same. That is, in the first embodiment, the seal structure is formed by the O-ring, whereas in the second embodiment, the seal structure is formed by the contact (press-contact) structure between the valve member lower taper portion 31a and the valve housing taper portion 21a. Is formed.

Above the valve member 31 and between the stem 23 and the valve housing 21, an upper chamber 51 which functions as a storage chamber and also functions as a flow passage is formed. Below the valve member 31 and below the valve housing 21, a lower chamber 53 communicating with the aerosol container is formed. As shown in FIG. 1 (see FIG. 7), the valve
In the state described above, the communication path between the upper chamber 51 and the lower chamber 53 is shut off by the first valve flow path 61 that connects the upper chamber 51 and the lower chamber 53 and the contact structure between the tapered surfaces 21a and 31a. It has an upper second valve channel 63a and a lower second valve channel 63b.

In the state shown in FIG. 4, that is, in the closed state, that is, when the aerosol product is not used, the aerosol filler pressurized by the propellant is supplied to the upper chamber 51 and the lower chamber 5.
3 is filled, but the gasket 13
Is closed, so it does not squirt outside. The upper chamber 51 and the lower chamber 53 (that is, the inside of the aerosol container) communicate with each other. When the stem is slightly depressed from the state of FIG. 4, the state of FIG. 5 is obtained, and when the stem is further depressed, the state of FIG. 6 is obtained.

The state shown in FIG. 5 shows a fixed amount and small amount injection state. When the stem 23 is pushed down slightly, the stem 23 is pushed down against the upper spring, the gasket 13 is bent and deformed, and the communication passage 25 opens to the outside.
At this time, as the stem 23 descends, the lower tapered portion 23a of the stem 23 comes into contact with the upper tapered portion 31a of the valve member 31 to form an airtight state, and the first flow passage 61 and the upper chamber 51
Is shut off. Further, the valve member 31 is urged upward by the lower spring 35 to be pressed against the valve housing 21, and the valve housing taper portion 21a
The lower tapered portion 31b of the valve member is pressed against the second flow passage 63a, and the upper second flow passage 63a and the lower second flow passage 63b are shut off. Therefore, the lower chamber 53 communicating with the inside of the aerosol container is not open to the outside. on the other hand,
The upper chamber 51 is opened to the outside via the communication passage 25, and an aerosol composition containing a propellant (propellant) filling the upper chamber 51 is jetted to the outside from the jet port 29.
This is a fixed amount and small amount injection state.

The state of FIG. 6 shows a state of a large amount and continuous injection. When the stem 23 is further pushed down, the stem 23 descends against the lower spring 35. As a result, the valve housing taper portion 21a and the valve member lower taper portion 31b
The lower second flow passage 63b and the upper second flow passage 63a communicate with each other, and the filling in the aerosol container flows from the lower chamber 53 to the lower second flow passage 63b and the upper second flow passage 63.
a, it is injected to the outside through the upper chamber 51, the communication passage 25, and the ejection port 29. This is a large, continuous jet.

[0018]

According to the aerosol valve of the present invention, two-stage switching between small-quantity fixed injection and large-quantity continuous injection is possible.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of an aerosol valve of the present invention, showing a closed state of an aerosol container (when not in use).

FIG. 2 is a cross-sectional view showing the aerosol valve of FIG.

FIG. 3 is a cross-sectional view of the aerosol valve of FIG. 1 during a large amount and continuous injection.

FIG. 4 is a sectional view showing another embodiment of the aerosol valve of the present invention, in which the aerosol container is closed (when not in use).
Is shown.

FIG. 5 is a cross-sectional view of the aerosol valve of FIG. 4 during a small amount / quantity injection.

FIG. 6 is a cross-sectional view of the aerosol valve of FIG. 4 during large-volume, continuous injection.

FIG. 7 is a sectional view taken along line AA of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Mounting cap 13 Gasket 21 Valve housing 21a Valve housing taper part 23 Stem 23a Taper part 25 Communication path 27 Upper spring 29 Spout port 31 Valve member 31a Valve member upper taper part 31b Valve member lower taper part 33 O-ring 35 Lower spring 41 Connecting Member 51 Upper Chamber 53 Lower Chamber 61 First Flow Path 63a Upper Second Flow Path 63b Lower Second Flow Path

Claims (1)

[Claims] 1. An aerosol valve which is hermetically attached to an aerosol container and ejects an aerosol high-pressure filling in the aerosol container by ejecting the aerosol high-pressure filling to the outside. A valve housing which is open at the front end and which opens to the outside; a gasket which is disposed at the front end of the valve housing and which keeps the valve housing airtight with respect to the aerosol container when not spraying; and which is airtight with respect to the gasket. The base portion is housed in the valve housing, the front end has an ejection passage that is exposed to the outside, and has a communication passage that enables communication between the ejection passage and the inside of the valve housing by bending the gasket. A stem operable toward the interior of the aerosol container; Sometimes a stem is urged and pressed against the gasket to close the communication passage of the stem by the gasket, while, at the time of injection, it is deformed to make the stem operable and open the communication passage to the inside of the valve housing. The elastic member communicates the stem with the inside of the aerosol container at the time of non-injection, has a first flow passage that is closed when the stem is operated small toward the inside of the aerosol container, and further increases the size of the stem. A valve member having a second flow passage that opens when actuated toward the inside of the aerosol container; and a second elastic member that urges the valve member in a direction to close the second flow passage. When the stem is operated small, the filler present in the valve housing and between the stem and the valve member is injected, and when the stem is operated further, the aerosol is used. An aerosol valve capable of two-stage injection, characterized in that the filling inside the container can be injected.