JP2606516Y2 - Metering valve for aerosol containers - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metering valve for use in an aerosol container in which contents stored under pressure are applied to a container main body to be discharged to the outside by a stem moving operation, and particularly to a metering valve associated with the stem movement. The present invention relates to a metering valve for an aerosol container in which the amount of discharged contents is constant.

[0002]

2. Description of the Related Art In general, an aerosol container is one in which stored contents are released to the outside by the pressure inside the container body, and a stem provided on the container body is moved by an operation of a push button or the like to move the container. The contents are discharged by bringing the inside of the main body into communication with the external space.

FIG. 4 is an explanatory view showing a conventional aerosol container (JP-A-2-242770) in which the contents discharged by one operation are made constant.

[0004] This aerosol container generally comprises: a stem (an outlet groove 62, a bore 61) communicating with an external space, and a stem (moving against a biasing force (elastic force of a spiral spring 79)). Valve stem 78)-The stem (valve stem 78) is housed in the fixed amount chamber (annular measuring chamber 7).
7) A fixed wall for forming a fixed amount chamber (main body 76) in which a communication hole (a long hole 67) is formed between the movable wall and a fixed wall for forming a fixed amount chamber (a long hole 67) which covers the communication hole (a long hole 67). When the tubular side wall 50) or the stem (valve rod 78) is moved and the injection passage (the outlet groove 62, the bore 61) is in communication with the internal space of the fixed wall for forming the fixed quantity chamber (the main body 76), the stem is formed. An elastic member (elastic sleeve 7) including an inflow hole (inlet opening 80) closed by a part of the (valve rod 78).
4) A holding member (cup 73 made of a hard plastic material) for holding an upper portion (annular sleeve flange 15) of an elastic member (elastic sleeve 74) is provided.

When the valve rod 78 is moved up by the urging force in the non-use mode shown in the drawing, the bore 61 is closed by the seal 60 and the lower part of the valve rod 78 is separated from the inlet opening 80 of the elastic sleeve 74. Become.

At this time, the liquid in the container passes through the dip tube 25. The inlet opening 10 of the elastic sleeve 74 -the internal chamber 54 around the valve rod 78 -The inlet opening 10 of the elastic sleeve 74 -the length of the main body 76 Hole 67-annular measuring chamber 77-Collection chamber 11-moving along each route of the space portion 81 between the cup 73 and the elastic sleeve 74.

Since the internal pressures of the inner chamber 54, the annular measuring chamber 77 and the space 81 after the liquid has moved are the same, the tubular side wall 50 is not deformed from the state shown in the drawing, and the inner chamber 54 and the annular measuring chamber 77 are not deformed. Is filled with liquid.

In this state, when the user presses the operation unit,
When the elastic force of the helical spring 79 moves down, the valve rod 78 closes the rib 65 of the inlet valve means 64 at the tapered portion following the inner end 57, and the bore 61 separates from the seal 60 to open. The liquid contained in the inner chamber 54 and the annular measuring chamber 77 is discharged outside through the bore 61 and the outlet groove 62.

At the time of the discharging operation, the pressure of the annular measuring chamber 77 which is in communication with the external space and separated from the inside of the container is smaller than that of the space portion 81 which remains in communication with the inside of the container. The portion of the ring 50 in contact with the annular measuring chamber 77 is deformed toward the main body 76 to reliably send the liquid in the annular measuring chamber 77 toward the bore 61 and the outlet groove 62.

[0010]

In such a metering valve, an elastic member (elastic sleeve 74) comprising a movable wall (tubular side wall 50) for forming a metering chamber and an inflow hole (entrance opening 80) is provided. Upper part (annular sleeve flange 1
5) is only held, and the portions (the inlet opening 80, the ribs 65 of the inlet valve means 64) such as the inflow holes that perform the valve action on the stem (valve rod 78) are suspended in a so-called manner. I have.

For this reason, the portion (the inlet opening 80, the rib 65 of the inlet valve means 64) such as the inlet hole of the movable wall for forming the fixed quantity chamber (the tubular side wall 50) is closed by the vertical movement of the stem (valve rod 78). Alternatively, when the valve is opened, the portion may be largely displaced, and the movement of the stem may change suddenly, and the response and accuracy of the valve operation between the two may deteriorate.

Therefore, according to the present invention, only the upper part of the elastic member having the movable wall for forming the fixed amount chamber and the hole for inflow of the contents for discharge capable of being closed / opened by the action of the stem is provided. By holding the inflow hole side portion with the holding member, and forming a hole in the holding member to communicate the space between the holding member and the movable wall for forming the fixed amount chamber and the inside of the container body. It is an object of the present invention to make the closing / opening operation between the stem and the inflow hole portion quick and accurate.

[0013]

Means for Solving the Problems In order to achieve this,
In the present invention, a `` stem which forms an injection passage for communicating the inside and the outside of the container main body, and which secures this communication state by movement against the urging force, and a container for accommodating the stem are provided. Provided inside the body,
A fixed wall for forming a fixed volume for forming a fixed volume for forming a communicating hole with the fixed volume chamber and an opening for allowing movement of the stem and passage of the contents for release from inside the container, The fixed wall for forming the fixed quantity chamber has a movable wall for forming the fixed quantity chamber corresponding to the portion including the communication hole, and is closed from the previously opened state by contact with the stem moved until the communication state is secured. State, and holding the elastic member formed of the hole for inflow of the discharge contents formed in the portion communicating with the opening, and the upper portion of the elastic member and the respective portions on the inflow hole side. And a holding member that forms a hole communicating with the space from the inside of the container, and the stem moves to communicate with the injection passage and the inflow hole. When the closed state of the part is secured, The fixed wall for forming the fixed amount chamber moves toward the fixed wall for forming the fixed amount chamber due to the pressure in the space, and the contents accumulated in the fixed amount chamber between the two move to the communication hole and the injection passage. Aerosol container metering valve ", characterized in that it is discharged to the outside through

With such a configuration, even when the stem moves and closes / opens the inflow hole of the movable wall for forming the fixed quantity chamber, the inflow hole rarely shifts. Accuracy and responsiveness of the closing / opening operation between the stem and the inlet hole are improved.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In these figures, 1 is a container main body, 1a is a cap 2 is a stem, 2a is an injection passage for communicating the inside of the container main body with an external space, 2b is a lower part 3 of the stem and biases the stem 2 upward. The packing 5 is a cylindrical fixed wall for forming a fixed chamber for accommodating a stem, 5a is a communication hole with the fixed chamber 7, and 5b is an opening 6 is an outer peripheral surface of the fixed wall 5 for forming a fixed chamber. Communication hole 5a
An elastic member corresponding to the portion including the above, 6a is a movable wall for forming a fixed amount chamber, 6b is a hole for inflow having a shape closed by the lower part 2 of the stem, and 6a is a communication hole 5a of the fixed wall 5 for forming fixed amount chamber (A part of) the fixed amount chamber 8 formed between the containing part and the fixed amount forming chamber movable wall 6a is formed between the upper part of the elastic member 6 and the inflow hole side part with the fixed amount forming chamber fixed wall 5. The holding member 8a is a hole for communicating the internal space of the container body 1 with the space 9, the holding step 8b is a holding step, and the holding projection 9 is a fixed chamber forming movable wall 6a. The space portions 10 formed between the holding members 8 indicate pipes through which the contents pass.

A cap 1a attached to the container body 1.
Is provided with a stem 2 penetrating the packing 4, a coil spring 3 is provided between the stem 2 and the stem 2 to urge the stem 2 upward, and a fixed wall 5 for forming a fixed amount chamber is formed. It is set with its upper end in contact with the lower surface of the packing 4.

The upper portion of the elastic member 6 and the portion on the side of the inflow hole are held between the holding step 8b and the holding projection 8c and the fixed wall 5 for forming the fixed amount chamber. 6 is fitted into the cap 1a. The elastic member 6, the fixed wall 5 for forming the fixed amount chamber, and the packing 4 are held by the cap 1a by the holding member 8.

The lower portion 2a of the stem 2 and the inflow hole 6b
Each of the contact portions is formed in a tapered shape, and the communication hole 5a is formed in a slit shape cut out from the opening 5b. Further, a fixed amount chamber 7 is formed between the fixed wall 5 for forming the fixed amount chamber and the movable wall 6a for forming the fixed amount chamber, and a space 9 is formed between the movable wall 6a for forming the fixed amount chamber and the holding member 8, respectively. The holding member 8 is provided with a hole 8a.

In the non-use mode of FIG. 1, the injection passage 2a
Is closed and the inflow hole 6b is opened, and the contents of the container body 1 are filled with the pipe 10-inflow hole 6b- as shown by the solid arrow.
The fixed wall for forming the fixed amount chamber is formed because the opening 5b enters the fixed amount chamber 7 through the communication hole 5a and the internal pressure of the container body 1 reaches the space 9 through the hole 8a. There is no pressure difference between the space 7 and the space 9, and the elastic member 7 remains set.

2, the stem 2 is moved downward against the urging force of the coil spring 3, and the lower portion 2b is brought into contact with the tapered surface of the inflow hole 6b. In the use mode in which the inflow hole 6b is slightly moved downward, the inflow hole 6b is strongly closed, and at the same time, the injection passage 2a is opened to generate a pressure difference between the fixed quantity chamber 7 and the space 9.

Thus, the movable wall 6a for forming the fixed amount chamber is
The pressure in the space 9 (the pressure inside the container body 1 via the hole 8a) is pressed against the fixed wall 5 for forming the fixed amount chamber,
Is reduced, the contents of the metering chamber 7 are discharged to the outside through the communication hole 5a and the injection passage 2a as indicated by a dotted arrow.

The hole 8a is provided at a portion separated from the communication hole 5a. This is because when the hole 8a is provided in the vicinity of the communication hole 5a, the pressure through the hole 8a causes
This is because a portion of the fixed-chamber forming movable wall 6a may be deformed and block the communication hole 5a before is completely reduced.

The hole 8a may be provided at a position distant from the communication hole 5a. For example, when the communication hole 5a is formed in the upper part of the fixed wall 5 for forming a fixed amount chamber, the hole 8a is formed.
Is provided in the lower part of the holding member 8, and the movable wall 6a for forming the fixed amount chamber is pressed against the fixed wall 5 for forming the fixed amount chamber in order from a portion apart from the communication hole 5a.

When the stem 2 is returned to the original state and the closing of the injection passage 2a and the opening of the inflow hole 6a are ensured, the contents of the container body 1 newly enter the quantitative chamber 7, and The pressure difference between the pressure chamber and the inside of the container body 1 disappears, and the movable wall 6a for forming the fixed amount chamber returns to the non-use mode in FIG. 1 by its own elasticity. By repeating such a non-use mode and a use mode, in use, a predetermined amount of contents is discharged to the outside by one discharge operation.

The elastic member 6 is in a state in which the portion of the movable wall 6a for forming the fixed amount chamber returns to the original state when the pressure difference between the fixed amount chamber 7 and the space 9 disappears, that is, fixed for forming the fixed amount chamber. It is necessary to set it in a state where it is not held by itself while being pressed against the wall 5.

FIG. 3 shows an embodiment in which the inner diameter of the cap 1a is small or the amount of discharge is large. In this case, a part of the elastic member 6 is used as a part of the fixed wall 5 for forming a fixed amount chamber, and the hole 8 a is formed below the holding member 8.

The stem 2 is moved downward and its lower portion 2b
In the use mode in which the inflow hole 6b is closed and the injection passage 2a is opened, the pressure difference between the fixed amount chamber 7 and the space 9 causes the fixed amount chamber forming movable wall 6a to move as shown by the dotted line. The volume of the fixed volume chamber 7 is reduced by being pressed against the chamber forming fixed wall 5 (including a part of the elastic member 6). As a result, the contents corresponding to the volume of the fixed amount chamber 7 are transferred to the communication holes 5 as indicated by the dotted arrows.
a- Discharged to outside through the injection passage 2a.

The content may be liquid or gaseous, but particularly when it is a viscous liquid, it is easy to achieve the quantitative release function. This is because the gaseous substance enters the fixed quantity chamber 7 in a state of being compressed, and the discharge amount changes according to the compression ratio. This is because the liquid-like material itself is hardly compressed.

[0029]

As described above, the present invention provides an elastic member having a movable wall for forming a fixed amount chamber and a hole for inflow of a content for discharge capable of being closed / opened by the action of a stem. Since the inflow hole side portion as well as the upper portion is held by the holding member, even when the stem moves to close / open the inflow hole portion of the movable wall for forming the fixed quantity chamber, the inflow hole is also held. It is possible to make the closing / opening operation of the stem and the inflow hole portion quick and responsive and accurate.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a non-use mode according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a use mode according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a non-use mode according to a second embodiment of the present invention.

FIG. 4 shows a conventional aerosol container in which the content discharged by one operation is constant.
FIG.

[Explanation of symbols]

 1: Container main body 1a: Cap 2: Stem 2a: Injection passage 2b: Lower part 3: Coil spring 4: Packing 5: Fixed wall for forming fixed amount chamber 5a: Communication hole 5b: Opening 6: Elastic member 6a: Fixed amount Movable wall 6b for chamber formation: Hole for inflow 7: Quantitative chamber 8: Holding member 8a: Hole 8b: Step for holding 8c: Protrusion for holding 9: Space 10: Suction pipe

Claims (1)

(57) [Scope of request for utility model registration] 1. A stem for forming an injection passage for communicating between the inside and the outside of a container body, and the communication state being ensured by movement against a biasing force, and a container accommodating the stem. provided in the main body, and communicating Spoken hole of quantitative chamber in a part thereof, the stem
To move and pass contents for release from inside the container
A fixed wall for forming a fixed quantity chamber, a fixed wall for forming a fixed quantity chamber, a movable wall for forming a fixed quantity chamber corresponding to a portion including the communication hole of the fixed wall for forming a fixed quantity chamber, and the communication state is secured. the contact between the stem has moved until the far
The state changes from the open state to the closed state, and passes through the opening.
An elastic member comprising a hole for inflow of the content for release formed in a portion to be twisted; and a predetermined space formed between the elastic member and the respective portions on the upper side and the hole for inflow side of the elastic member. And a holding member formed with a hole communicating with the space from the inside of the container, and when the stem moves to secure the communication state of the injection passage and the closed state of the inflow hole. The movable wall for forming the fixed quantity chamber moves toward the fixed wall for forming the fixed quantity chamber due to the pressure of the space, and the contents accumulated in the fixed quantity chamber between them move into the communication hole and the injection port. A fixed quantity valve for an aerosol container characterized in that the fixed quantity valve is discharged outside through a passage for use.