JP2003072868A - Upright and upside-down valve for aerosol vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an upright and upside-down valve for an aerosol vessel which can open/close a valve on a bypass port side by using a gasket. SOLUTION: A flow passage switching valve part 20A for bypassing a dip tube 9 to allow the content to flow into a housing 11 from a tip in an upright condition of the aerosol vessel 1 when the aerosol vessel is upside down is attached to an injection valve part 10. The flow passage switching valve part is connected to the dip tube 9 at a lower end part, and formed in a tubular shape having a longitudinal flow passage communicated in the housing on an upper end part, and a valve chamber 22 having an inlet 21 with a ball 30 seated and an outlet 23 which is located above the inlet and closed by the ball 30 sliding down when the aerosol vessel is upside down is formed in the longitudinal flow passage. An annular groove 26 constituted as a bypass port part 29a is formed on a circumferential wall of the longitudinal flow passage, a cavity part 27 communicated with the housing 11 is formed in an upper wall surface of the groove, and an annular gasket 25 with the bending elasticity is seated in the groove 26 so as to open the groove 26 into the cavity part 21 when the groove is deflected toward the cavity part 27 from the closed condition.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing provided at the top of an aerosol container, in which a stem hole sealed in a stem gasket and opened / closed by a pressing operation is formed in a peripheral wall, and the top portion is spring-biased. The injection valve part that houses the stem protruding from the
The present invention relates to a normal upside down valve for an aerosol container, in which a flow path switching valve part is attached to the injection valve part for bypassing a dip tube that allows the contents to flow into the housing from the tip when the aerosol container is upright.

[0002]

2. Description of the Related Art In a spraying head in which a dip tube whose weight is not attached to the tip of an aerosol container is attached to a valve, in the upright state, the contents at the bottom of the container are sprayed from the tip of the dip tube. On the other hand, in order to inject the contents even when inverted, it is necessary to bypass the dip tube and inflow the contents from the bypass port around the injection valve. Actual Kaihei 2-1
According to Japanese Patent Publication No. 08759, a valve in which a ball is housed in a valve chamber is interposed in a flow path connecting to a dip tube and its bypass passage, and when standing, the valve interposed on the dip tube side is opened to form a bypass passage. There is disclosed a normal inverted valve in which an intervening valve is closed and a flow path switching valve section that reverses these open / closed states when inverted is attached to the injection valve section.

[0003]

As a result, the release of the propellant component separated to the upper side of the object can be suppressed and the inflow passage can be switched according to the upright posture of the aerosol container. Even so, the structure is complicated and bulky because two ball valves are formed. Further, when the valve port is opened and closed with a ball, the sealed state is likely to be incomplete due to a slight tilt.

In view of the above points, the present invention has an object to provide a normal inverted valve for an aerosol container in which a valve on the bypass port side can be opened and closed by using a gasket.

[0005]

In order to achieve this object, the present invention provides a stem according to claim 1, which is sealed by a stem gasket in a housing provided at the top of the aerosol container and is opened and closed by a pushing operation. A hole is formed in the peripheral wall, and an injection valve part that houses a stem that projects from the crown in the spring-biased state is configured, and the contents are transferred from the tip to the housing when the aerosol container is upright. In a normal inverted valve for an aerosol container equipped with a flow path switching valve part that bypasses the dip tube that flows in when inverted, the flow path switching valve part is connected to the dip tube at the lower end and inside the housing at the upper end. It is constructed in the shape of a pipe with a vertical flow path communicating with it. A valve chamber is formed that has an outlet that is located and is closed by a ball that slides down when inverted, and an annular groove that serves as a bypass opening is formed in the peripheral wall of the vertical flow path, and the upper wall surface of this groove is formed. A cavity communicating with the inside of the housing is formed, and an annular gasket exhibiting bending elasticity is seated in the groove so that when the groove is closed and is bent toward the cavity, the groove is opened to the cavity. It is characterized by being

In an upright state, the ball at the inlet is bypassed or pushed up, and the contents flow into the housing from the dip tube by the injection pressure. As a result, when the stem is pushed down, the contents are released from the stem,
For example, it is ejected from the ejection port of the attached ejection head. In this state, there is no pressure drop in the cavity due to the contents flowing into the housing under pressure, so that the gasket does not bend towards the cavity and the groove remains closed. In the inverted state, the ball closes the outlet of the valve chamber, and when the stem is pushed down, the internal pressure of the housing decreases, so that the gasket bends into the cavity and the groove is opened to form the bypass opening. It

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A positive / inverted valve for an aerosol container according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. This forward / reverse valve for a container is configured by attaching a flow path switching valve portion 20A to an injection valve 10 with a stem provided on a boss portion 1a of a mounting cap 1 mounted on the top of an aerosol container. .

The injection valve 10 has a housing 11 held by a boss portion 1a having a stem insertion opening 1c, and a stem 13 projecting from the stem insertion opening 1c and biased upward by a spring 12 is stored in the housing 11. It is configured to be sealed by a rubber-made annular stem gasket 14 which allows the tip end portion to enter the annular seating groove 13b around the stem hole 13a formed in the peripheral wall and seats the tip end surface in an elastic pressure contact state. . When the stem 13 is pushed down, the distal end portion of the stem gasket 14 is interlocked and bends downward in the seating groove 13b to open in a non-seated state, and the contents introduced into the housing 11 can be discharged. When the push-down operation is released, the spring 12 restores the normal position.

The injection valve section 10 has the same basic structure as that of the conventional one, but the outer tube section 16 and the inner tube section 1 relatively projecting toward the lower end are provided at the bottom of the housing 11.
A double tube portion with 7 is formed coaxially with the stem 13.

The flow path switching valve portion 20A is composed of this double pipe portion and the pipe portion 20 to which the dip tube 9 is connected at the lower end portion. The vertical flow path includes the flow path 2
A valve chamber 22 for accommodating a ball 30 seated at an inlet 21 subsequent to 1a is formed, and an upper end thereof is fitted to an outer peripheral surface of the stepped portion 24 so that a lower end of the inner pipe portion 17 is seated. There is. In this fitted state, the lower end of the inner pipe portion 17 is formed in an inverted truncated cone shape so as to form the outlet 23 of the valve chamber 22 which is closed by the ball 30 when inverted.

Further, in this fitted state, the lower end surface of the outer pipe portion 16 and the distal end surface of the pipe portion 20 face each other with a distance corresponding to the thickness thereof so that the annular gasket 25 is mounted. By this, the annular groove 2 for the bypass opening
6 is formed. That is, the lower end surface of the outer pipe portion 16 has the groove 2
By forming the upper wall surface of 6, the outer peripheral portion is provided with a seat portion 28 for placing the annular cavity portion 27 on the outer peripheral surface of the inner pipe portion 17 and seating the surface of the outer peripheral portion of the gasket 25. Is forming. As shown in FIG. 2, this seating portion is formed with projections 28a on four sides to intermittently increase the seating area. Further, the upper end surface of the pipe portion 20 forms the lower side wall surface of the groove 26, so that the inner peripheral portion thereof forms the seat portion 29 for seating the back surface of the inner peripheral portion of the gasket 25, and the outer peripheral portion thereof is Bypass mouth 2
A frustoconical peripheral surface is formed so as to form 9a.

As a result, when the inner peripheral portion of the gasket 25 bends and is displaced into the hollow portion 27 to open the groove 26 in the hollow portion 27, the contents pass from the ribs 10a through the flow passages 27a on both sides. It flows into the housing 11. The contents flowing from the tip of the dip tube 9 flow into the housing 11 via the flow path 21a and the flow path 17a at the bottom of the housing 11.

The operation of the forward / inverted valve for an aerosol container thus constructed is as follows. In the upright state, the ball 30 is seated at the inlet 21, and the contents push up the ball 30 through the inflow passage 21a from the dip tube 9 and flow into the housing 11. As a result, when the stem 13 is pushed down, it is ejected from the ejection port of the ejection head. In this state, since the contents under pressure due to the injection pressure are flowing into the housing 11 in the cavity 27, the pressure does not decrease, the gasket 25 does not bend, and the upper layer propellant component The bypass port 29a remains closed to prevent inflow.

In the inverted state, the dip tube 9 has no weight, so that its tip is located near the bottom of the aerosol container. The ball 30 slides in the valve chamber 22 and closes the outlet 23. When the stem 13 is pushed down, the internal pressure of the housing 11 is reduced, the gasket 25 is separated from the seating portion 29 and is bent into the hollow portion 27, and the bypass opening portion 29a is passed through the hollow portion 27 and the flow path 27a. The contents flow into the housing 11. At this time, the gasket 25 is restrained by the projecting portion 28a, so that the spring force between the gasket 25 and the gasket 25 is maintained in a large state and the disconnection at the end of injection is improved.

The embodiment in which the flow path switching valve section is constructed in combination with the double pipe section at the bottom of the injection valve has been described above. However, an independent pipe-shaped flow path switching valve section is simply injected. It is also conceivable that the valve is fitted.

[0016]

According to the invention of claim 1, since the valve bypassing the inflow passage on the dip tube side is opened and closed by using the gasket, the structure is simplified, the space is saved, and the inclination is slight. There is no fear of opening. According to the invention of claim 2, since a part of the flow path switching valve portion using the gasket is configured by using the injection valve,
The structure can be further simplified.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a positive / inverted valve for an aerosol container according to an embodiment of the present invention.

FIG. 2 shows a sectional structure of each part of the inflow passage switching valve of the valve taken along the line A in FIG.

FIG. 3 is a sectional view of an essential part of the valve when it is inverted.

[Explanation of symbols]

9 dip tube 10 Injection valve section 11 housing 13 stems 14 Stem gasket 16 Outer tube 17 Inner tube 17a, 21a, 27a Flow path 20 Pipe part 20A flow path switching valve 21 entrance 22 valve chamber 23 exit 25 gasket 26 groove 27 Cavity 28, 29 seat 29a Bypass mouth 30 balls

Claims (2)

[Claims] 1. A housing provided at the top of an aerosol container has a peripheral wall formed with a stem hole that is sealed by a stem gasket and opened / closed by a pressing operation, and a stem projecting from the top in a spring-biased state is accommodated. The injection valve section is configured and the injection valve section is
When the aerosol container is upright, the flow path switching valve is installed at the lower end of the normal upside down valve for an aerosol container that is equipped with a flow path switching valve that bypasses the dip tube when it is inverted. The pipe is connected to the dip tube and has a vertical flow path communicating at the upper end with the inside of the housing. The vertical flow path is positioned above the inlet where the ball is seated and above the inlet. A valve chamber having an outlet closed by the ball that sometimes slides down is formed, and an annular groove that forms a bypass opening is formed on the peripheral wall of the vertical flow path, and the housing is provided on the upper wall surface of the groove. A cavity communicating with the inside is formed, and when the groove is closed and is bent toward the cavity, the groove is opened to the cavity. An upright valve for an aerosol container characterized in that an annular gasket exhibiting bending elasticity is seated on the seat. 2. A double pipe portion is formed at a bottom portion of the housing, the inner pipe portion projects toward the lower end direction from the outer pipe portion, and the outlet of the valve chamber is formed at the lower end portion of the inner pipe portion. The lower end surface of the outer pipe portion forms an upper wall surface of the annular groove, and the upper end portion of the flow path switching valve portion is fitted on the outer peripheral surface of the inner pipe portion so as to form a valve chamber for accommodating a ball. And the upper end surface of the flow path switching valve portion forms the lower side wall surface of the groove, and the cavity portion for displacing the gasket upward is formed between the inner pipe portion and the outer pipe portion. The forward / inverted valve for an aerosol container according to claim 1, wherein