JPH07315462A - Fixed-quantity valve for aerosol container - Google Patents

Abstract

PURPOSE:To position the stem relative to the housing so as to positively guide the stem in the direction in which it ought to move as intended and tighten the seal between the stem and a blocking part in such a manner as to prevent an impulse therebetween. CONSTITUTION:Inside a housing 2 in which a through hole 3 is formed a stem is provided, which moves with its outward circumferential surface 6a separated from an inward circumferential surface 2a and between a first position wherein a space 4 does not communicate with the outside and the contents are allowed in through the through hole 3 and a second position wherein the inflow of the contents is stopped and the space 4 communicates with the outside. Projections 13 are provided at arbitrary intervals circumferentially on the outward circumferential surface 6a and placed virtually in contact with the inward circumferential surface 2a. Furthermore, the stem 6 is provided with a projection for blocking up the inlet of a passageway 7 until, when the stem 6 moves from the first position to the second position, a bending working part 16 causes a blocking part 8 to assume a bent state corresponding to a closed state of the inflow channel from the through hole 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention, when the stem moves to a predetermined position, closes the flow path of the contents into the space for temporarily storing the contents in the housing and communicates between the outside and the space. The present invention relates to a metering valve for an aerosol container in which the content in the space is released to the outside and the amount of the released content is constant.

[0002]

2. Description of the Related Art Generally, an aerosol container is designed to discharge the contents stored therein by the pressure inside the container body. The discharging operation is carried out while the container is housed in the housing of the container body. By moving the stem from a predetermined position against the bias, the inside of the container body and the outside are brought into communication with each other, and the contents are discharged to the outside.

[0003] In the aerosol container, the contents of which are cosmetics, medicines, etc., often require that the contents be taken out in predetermined amounts. In order to make the amount of contents to be discharged by the discharging operation constant, Japanese Utility Model Publication No. 45-14212, Japanese Utility Model Publication No. 51-23926, Japanese Utility Model Publication No. 2-66259, and the applicant of the present application, Japanese Utility Model Publication No. 6-14081. There is one described in the publication.

In these, when the stem moves to open the passage portion that communicates between the outside and the space, a part (closed portion) of the stem closes the inflow path of the contents into the housing. At this time, the predetermined amount of contents in the housing reaches the entrance of the passage after passing through the gap between a part of the outer peripheral surface of the stem and the inner peripheral surface of the housing. It is released to the outside through the part.

Further, in order to discharge the contents in a constant amount, the flow path of the contents into the housing is first closed as the stem moves, and then the space between the outside and the inside of the housing is closed. It is necessary to secure communication. That is,
It is necessary that the stem can be moved within a certain range, the closed state is secured by the first movement, and the communication state is secured by the subsequent movement.

This is because, if the communication state is secured before the closed state, the contents in the container body enter the housing even after the communication, and a predetermined amount or more of the contents are discharged to the outside. And, therefore, traditionally,
A movable range of the stem is ensured by slidable between the stem and a closing portion for closing the passage portion, and the closed state is secured at an earlier stage than the communication state.

[0007]

As described above, according to the above-mentioned conventional apparatus, when the communication state between the outside and the inside of the housing is secured, the contents inside the housing and the stem of the housing and the stem. Since a part of the outer peripheral surface of the stem is separated from the inner peripheral surface of the housing in order to ensure a smooth flow of this content, the flow is sent to the passage part through the gap between the outer peripheral surface and a part of the outer peripheral surface. It is necessary that they move in a form and that a gap of a certain width is provided between them.

As a result, the stem moves in a state where the gap forming portion on the outer peripheral surface thereof is not positioned by others. Therefore, when the stem moves, it moves in a direction deviating from the original movement direction. There is. Such a movement cannot surely close the inflow path into the housing. If the inside of the housing is communicated with the outside in this state, the inflow of the content into the housing and the outside of the content by the passage portion Will be released at the same time,
It has a problem that the intended function such as the fixed amount release of the contents cannot be exerted.

Further, since the relative moving distance between the stem and the closed portion for closing the passage portion of the stem is secured and the closed state is performed at an earlier stage than the communicating state, both of them are conventionally used. Although the space is slid between them, as a result of slurring between them in this way, a strong seal cannot be created between the closed part and the stem, and if the stem moves even a little, the contents of the space part will be lost. There is a problem that it leaks to the outside from between the closed portion and the stem.

Therefore, according to the present invention, by positioning the stem in the gap portion through which the contents pass,
By positively guiding the stem in the direction in which it should originally move, the closed state and the communication state can be reliably ensured, and the intended function of quantitatively releasing the content can be reliably exhibited.
In addition, a metering valve for an aerosol container that prevents the contents from leaking between the stem and the closed part by strengthening the seal between the stem and the closed part so that the space between the stem and the closed part does not move. The purpose is to provide.

[0011]

A metering valve for an aerosol container according to the present invention comprises a housing provided in a container body and a stem movably in the housing, and a discharge is provided in the housing. A hole is formed between the inside of the main body of the container in which the contents of interest are stored, and the movement of the stem causes the space inside the housing for temporary storage of the contents to not communicate with the outside. From the first position where the inflow path of the contents from the space to the space is opened and the second position where the space is in communication with the outside after the inflow path is closed. A part of the surface is formed away from the inner peripheral surface of the housing, and further, the stem has a passage portion for communicating and a closing portion for closing the inflow path, and the outer peripheral surface of the stem. Part of a part or corresponding A plurality of convex parts that are in almost contact with the mating part are provided at arbitrary intervals in at least one circumferential direction of the inner peripheral surface of the housing, and when the stem moves, the convex parts perform positioning operation. In the second position of the stem, the contents in the housing are moved between the convex portions to move to the passage portion.

Another aerosol metering valve for an aerosol container according to the present invention comprises a housing having a hole similar to the above.
Moving between the first and second positions as above,
Further, at least the deformable passage portion for communication, the closing portion for closing the inflow passage, and the stem forming the bending action portion for the closing portion described later, and the portion of the passage portion on the side facing the inlet are at least deformable. And a closing portion provided so as to close the inlet at the first position of the stem, and further, at least one of contact surfaces of the stem and the closing portion at the first position. When the stem moves from the first position to the second position in the predetermined portion of the, the projection for keeping the inlet closed by the bending action portion until the closing portion is in the bending state corresponding to the closed state of the inflow path. Is provided.

[0013]

As described above, in the case where a plurality of convex portions are provided in the circumferential direction of at least one of the predetermined portion of the outer peripheral surface of the stem or the portion of the inner peripheral surface of the housing corresponding thereto, the stem moves. At times, these convex portions are in contact with or slightly apart from the mating part (substantially contact state) to maintain a constant distance between the outer peripheral surface of the stem and the inner peripheral surface of the housing, so that the stem is relative to the housing. While moving in a state where the positioning is performed, a space between these convex portions is secured as a passage for moving the contents in the housing.

Further, in the case where the protruding portion is provided on at least one predetermined portion of each abutting surface of the stem and the closing portion, when the stem moves within the predetermined range from the first position, the bending portion bends the closing portion. Since the protruding portion and the closed portion are still in contact with each other even when the stem portion reaches the second position where the inflow path of the content through the hole portion is closed, the inlet of the passage portion It remains blocked.

Then, when the inflow path of the contents is closed and the closing portion is further bent and the stem reaches the second position, the inlet of the passage portion is opened, and the outside is communicated with the inside of the housing. The contents in the housing are discharged to the outside through the passage. That is,
The stem moves tightly between the closed part and the closed part to firmly seal the two parts, and within a certain range after the start of the movement, the inlet of the passage part is kept closed to keep the inflow path closed. This entrance is not opened before it is secured.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In the figure, 1 is a container body, 1a is a ceiling portion, 2 is a housing, 2a is a large diameter portion of the inner peripheral surface, 2b is a small diameter portion of the inner peripheral surface, 3 is a hole portion, 4 is a space portion, 5 is an annular protrusion, 6 Is a stem, 6a is an outer peripheral surface, 7 is a passage portion, 8 is a stem rubber, 8a is an end portion, 9 is a coil spring, 10 is a first closing portion, 11 is a second closing portion, 12 is a communication hole, 13 Is a convex portion, 14 is a gap, 15 is a filling hole portion, 16 is a bending action portion, 17 is a shoulder portion, 18
Is a protrusion.

Here, as shown in FIG. 1, the housing 2 is fitted inside the central projecting portion formed on the container body 1 with the stem rubber 8 sandwiched between it and the ceiling portion 1a. . The housing 2 has an inner peripheral surface formed of a large diameter portion 2a and a small diameter portion 2b, an annular projection 5 is provided on a part of the inner peripheral surface, and a hole portion is formed between the inner peripheral surface and the inside of the container body 1. 3 is provided so that the contents to be discharged can flow into the space 4 for temporarily storing the contents in the housing 2.

Next, a stem 6 is provided in the housing 2 in a state of being biased by a coil spring 9, and the stem 6 has a shoulder 17 for receiving an end 8a of a stem rubber 8. From the position 1 against the bias of the coil spring 9, the second end portion 8a is bent by the bending action portion 16
It is possible to move to the position. A predetermined gap 14 is formed between the outer peripheral surface 6a of the stem 6 and the large diameter portion 2a of the housing 2.

The stem rubber 8 is made of an elastic material such as rubber or synthetic resin and is formed in a disk shape having a through hole in its center. The end portion 8a of the stem rubber 8 is bent. The shape of the bending action portion 16 is not limited to the tapered shape as shown in the drawing, and for example, the end portion 8a having a curved surface protruding from the outer peripheral surface of the stem 6 or having a curved surface.
It is possible to use various shapes capable of bending.

The stem 6 is provided with a passage 7 for communicating the space 4 with the outside.
In the first position, the inlet of this passage 7 is the stem rubber 8
Is closed. Further, the stem 6 is provided with a first closing portion 10 and a second closing portion 11,
In the second position, the first closing portion 10 abuts on the annular projection 5 and the second closing portion 11 abuts on the small diameter portion 2b, so that the flow path for the contents from the hole 3 is closed. ing.

Further, as shown in FIG. 2, the outer peripheral surface 6a of the stem 6 is provided with a plurality of convex portions 13 which are in contact with or slightly apart from the large diameter portion 2a (substantially contact state) in the circumferential direction. It is provided at regular intervals. The projections 13 are not limited to the shape and number shown in the figure, and for example, three or more hemispherical projections may be provided at equal intervals, and each projection 13 is not limited to be provided at regular intervals. Alternatively, adjacent intervals may be different.

Further, the convex portion 13 is not limited to being provided only on the outer peripheral surface 6a of the stem 6, but instead of this, the large diameter portion 2a of the housing 2 and the convex portions 13 on both of them are provided. It may be provided.

Although the illustrated one is configured to close the inflow path of the contents from the hole 3 by the two closed portions, the first closed portion 10 and the second closed portion 11, the present invention is not limited to this. However, for example, the second closing portion 11 is formed on the inner peripheral surface of the housing 2.
When the stem 6 moves, the second closing portion 11 slidably moves on the inner peripheral surface, so that the inflow path is closed by the first closing portion 10. On the contrary, the portion of the first closing portion 10 is always brought into contact with the annular projection 5, and when the stem 6 moves, the first closing portion 10 slides with respect to the annular projection 5, and The closed state may be performed in the second closing portion 11.

A communication hole 12 provided in the stem 6 connects between the space 4 and the gap 14, and guides the contents of the space 4 into the gap 14. Further, the filling hole portion 15 provided in the housing 2 is used when filling the contents into the container body 1, and this filling method sends the contents from between the upper surface of the stem rubber 8 and the ceiling portion 1a, After that, it is performed by injecting it into the container body 1 through the filling hole 15.

Next, the use state of the metering valve for aerosol container of the present invention will be explained. From the non-use mode (the stem 6 is in the first position) shown in FIG. 1, the stem 6 is pressed and the coil spring 9 is biased. When it is moved in the direction of the inside of the container body 1 against, the first closing portion 10 comes into contact with the annular projection 5 and the second closing portion 11 comes into contact with the small diameter portion 2b,
The inflow path of the content from the hole 3 to the space 4 is closed.

When the stem 6 is in the second position, as shown in FIG.
As shown in FIG. 3, the inner peripheral surface portion of the stem rubber 8 is separated from the inlet of the passage portion 7 by bending the end portion 8a by the bending action portion 16, so that the contents of the space portion 4 pass through the communication passage 12 and form a gap.
After passing between the protrusions 13 of 14, the particles are discharged to the outside through the passage 7 and the use mode is set. When the stem 6 is moved, the communication passage 12 releases the pressure in the space portion 4,
This prevents the movement of the stem 6 from being hindered by the increase in pressure due to the reduction of the space 4.

Even if the contents of the space portion 4 are discharged to the outside from the passage portion 7, the first closing portion 10 and the second closing portion 10
Since the inflow path of the contents from the hole 3 to the space 4 is closed by 11 as described above, the contents of the container body 1 newly flow into the space 4 through the hole 3. As a result, a fixed amount of the content is released such that only the content previously stored in the space 4 is released to the outside.

When the pressing of the stem 6 is stopped, the stem 6 is returned to the first position by the biasing force of the coil spring 9, and at this time, the end 8a bent by the bending action portion 16 is its own. Since the elastic member and the pushing action of the shoulder portion 17 restore the original state, the inlet of the passage portion 7 is closed again by the stem rubber 8 to block the communication between the space portion 4 and the outside.

At this time, as the stem 6 returns, the first closing portion 10 and the second closing portion 11 also move, and the former is separated from the annular projection 5 and the latter is separated from the small diameter portion 2b. The inflow path of the contents from the hole 3 to the space 4 is released from the closed state, and the non-use mode shown in FIG. 1 is returned to.

Therefore, the contents of the container body 1 are the holes 3
The content is filled in the space portion 4 via and is discharged to the outside when the stem 6 is pressed next time. As a result of the above-described operation being performed each time the stem 6 is pressed, the content of the container body 1 is discharged to the outside in a fixed amount.

Next, as shown in FIGS. 4 and 5, an annular protrusion 18 is provided on the side of the stem 6 in the moving direction of the inlet of the passage 7.
In the non-use mode (the stem 6 is in the first position), the protrusion 18 strongly presses the inner peripheral surface portion of the stem rubber 8 outward, so that a strong contact state is formed between the two. The contact between the shoulder 17 and the end 8a is closed, and the entrance of the passage 7 is closed.

When the stem 6 is pressed from this non-use mode to move in the direction of the inside of the container body 1 against the bias of the coil spring 9, the first closing portion 10 and the second closing portion 11 are closed. When each of them contacts the annular projection 5 and the small diameter portion 2b, the flow path of the contents from the hole 3 to the space 4 is closed.

However, when the stem 6 moves (see, for example, FIG.
Even when the closed state is ensured and the end portion 8a is bent by the bending action portion 16, the protruding portion 18 remains in contact with the inner peripheral surface portion of the stem rubber 8. Therefore, the entrance of the passage 7 is closed, and the stem 6
6 is moved to the second position shown in FIG. 6, the inner peripheral surface portion of the stem rubber 8 is separated from the protruding portion 18.

As a result, the contents of the space 4 are communicated with the communication passage 12
After passing through the space between the protrusions 13 of the gap 14, it is discharged to the outside through the passage portion 7, and the use mode is set. in this way,
By delaying the securing of the communication state of the passage portion 7 during the movement of the stem 6, the inflow route of the contents into the space portion 4 is surely closed by the first closing portion 10 and the second closing portion 11, and The communication state can be secured, and a malfunction such as the communication state occurring before the closed state is avoided.

Therefore, the contents of the container body 1 do not newly flow into the space 4 through the hole 3 when the passage 7 is communicated, and only the contents previously contained in the space 4 are surely secured. A fixed amount of contents is released such that the contents are released to the outside.

When the pressing of the stem 6 is stopped and the coil spring 9 urges the stem 6 to return to the first position, the end portion 8a bent by the bending action portion 16 is pushed by the elasticity of itself and the shoulder portion 17. By the action, it returns to the original state and comes into contact with the projecting portion 18 again, so that the entrance of the passage portion 7 is closed again and the communication between the space portion 4 and the outside is blocked.

Then, as the stem 6 returns, the first closing portion 10 and the second closing portion 11 also move, and the former is separated from the annular projection 5 and the latter is separated from the small diameter portion 2b, so that the hole The inflow path of the contents from the part 3 to the space part 4 is released from the closed state, and the mode returns to the non-use mode shown in FIG.

Therefore, the contents of the container body 1 are the holes 3
The content is filled in the space portion 4 via and is discharged to the outside when the stem 6 is pressed next time. As a result of the above-described operation being performed each time the stem 6 is pressed or opened, the contents of the container body 1 are discharged to the outside in a fixed amount, as in the case shown in FIG.

The projecting portion 18 is not limited to the sectional shape and the annular shape in the circumferential direction as shown in the drawing. For example, the projecting portion 18 has a square sectional shape, or at least the movement of the inlet of the passage portion 7. It may be provided in a part corresponding to the direction side, and instead of providing the protruding portion 18 in the stem 6, the inner peripheral surface portion of the stem rubber 8 and further the stem 6 and the stem rubber. 8 may be provided on both sides.

When the protrusion 18 is provided on the stem rubber 8, the inner peripheral surface portion of the stem rubber 8 is successively formed to have a smaller diameter in place of the one having a hemispherical cross section as shown in the figure, and the inlet of the passage portion 7 is formed. You may make it use the thing which the part corresponding to the moving direction side of a part has the smallest diameter.

Further, the illustrated metering valve is premised on the use of the container body 1 in an inverted state (upside down from the illustrated state), and in this inverted state, the content of the container body 1 has a hole portion 3. Are accumulated on the side of the housing 2 having.

The metering valve is not limited to an inverted valve only and can be used when the container body 1 is upright (the stem 6 is located above the container body 1) or when the container body 1 is laid down. Can also be used. However,
To use in such a state, it is necessary to provide a suction pipe or the like for feeding the contents to the hole 3.

Further, in the structure shown in FIGS. 1 and 6, the chamber portion communicating with the space portion 4 may be formed separately from the housing 2 so as to increase the amount of the content discharged at one time. .

Further, by forming a part of the chamber portion with an elastic body that responds to the internal pressure of the container body 1, when the contents are discharged, the elastic body moves due to the internal pressure and the chamber portion The volume will be reduced and the amount of content released will be adjusted.

[0045]

As described above, according to the present invention, a plurality of convex portions that are in substantially contact with the mating portion are provided at arbitrary intervals in the circumferential direction of at least one of the outer peripheral surface of the stem and the inner peripheral surface of the housing. The stem performs positioning operation by this convex portion and is positively guided in the direction in which it should originally move by preventing wobbling, and ensures the closed state of the inflow path of the contents and the communication state of the passage part. As a result, it is possible to surely exhibit the intended function of quantitatively releasing the contents, and it is possible to use the space between the convex portions as a portion where the contents of the space pass.

Further, when the protrusion is provided on at least one of the contact surfaces of the inlet of the stem passage portion and the corresponding deformable closing portion in the first position (non-use mode), the stem is 1st position to 2nd position (use mode)
In the initial stage of moving to, the closing portion blocks the inlet of the passage portion, so the operation of opening the inlet after the inflow path to the housing is closed is surely performed,
The function of quantitatively releasing the contents can be made more reliable.

Further, since the stem is prevented from sliding when the stem is moved, a strong seal can be provided between the stem and the closed portion, and the contents of the space part are not exposed from the closed portion to the outside of the stem. Can be prevented from leaking to.

[Brief description of drawings]

FIG. 1 is a sectional view showing a non-use mode of an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a sectional view showing a mode of use of the embodiment shown in FIG.

FIG. 4 is a sectional view showing a non-use mode of another embodiment of the present invention.

FIG. 5 is a perspective view showing a stem and a stem rubber.

6 is a sectional view showing a mode of use of the embodiment shown in FIG.

[Explanation of Codes] 1 ... Container main body 1a ... Ceiling part 2 ... Housing 2a ... Large diameter part 2b ... Small diameter part 3 ... Hole part 4 ... Space part 5 ... Annular protrusion 6 ... Stem 6a ... Outer peripheral surface 7 ... Passage portion 8 ... Stem rubber 8a ... End portion 9 ... Coil spring 10 ... First closing portion 11 ... Second closing Part 12 ... Communication hole 13 ... Convex part 14 ... Gap 15 ... Filling hole part 16 ... Bending action part 17 ... Shoulder part 18 ... Projection part

Claims (2)

[Claims] 1. A housing in which a hole is formed between the inside of a container body in which the contents to be discharged are stored, and a space portion for temporarily storing the contents therein and the outside in the housing. A first position in which an inflow path of the content from the hole portion to the space section is opened without communication, and a first position in which the space section and the outside are in communication after the inflow path is closed. Between the two positions, a part of the outer peripheral surface of the housing moves away from the inner peripheral surface of the housing, and a passage portion for communicating and a closing portion for closing the inflow path are formed. A plurality of convex portions that are in contact with a mating portion in a circumferential direction of at least one of a predetermined portion of the outer peripheral surface or a portion of the inner peripheral surface corresponding thereto. Are provided at arbitrary intervals, and when the stem is moved, this A positioning operation is performed at the convex portion, and at the second position of the stem, the content in the housing moves to between the convex portions and moves to the passage portion. Metering valve. 2. A housing in which a hole is formed between the interior of a container body in which the contents to be discharged are stored, and a space portion for temporarily storing the contents therein and the outside in the housing. A first position in which an inflow path of the content from the hole portion to the space section is opened without communication, and a first position in which the space section and the outside are in communication after the inflow path is closed. A stem that moves between the two positions and has a passage portion for communicating, a closing portion for closing the inflow passage, and a bending action portion for a closing portion described later; and a stem facing the inlet of the passage portion. The stem side at the first position is deformable, and is provided with a closing portion provided so as to close the inlet when the stem is in the first position. At least of each contact surface with the When the stem moves from the first position to the second position on one of the predetermined portions, the inlet acts until the blocking portion is brought into a bent state corresponding to a closed state of the inflow path by the bending action portion. A metering valve for an aerosol container, which is provided with a protruding portion for closing the container.