JP7280461B2 - Fixed quantity injection mechanism for aerosol container - Google Patents

Description

According to the present invention, the content is filled into the metered chamber with the inflow valve open (outflow valve closed) by the content injection operation of the aerosol container, and the outflow valve is opened (inflow valve closed) at the end stage of the content injection operation itself. state), and a fixed amount injection mechanism that injects the filled content from the fixed amount chamber to the external space area.

In a content injection operation such as a push-down operation, the contents of the metering chamber are not injected by the return operation of the operation unit to the initial state after the operation, but the contents of the metering chamber are injected at the end of the user's injection operation itself. is jetted into the external space.

That is, when the injection operation is performed, the outflow valve for injecting the contents is first closed and the inflow valve corresponding to the stem is opened, so that the contents of the container flow into the metering chamber between these valves. The present invention relates to a constant injection mechanism that injects the contents of a constant amount chamber by closing and opening an outflow valve.

In the present invention, the content to be injected, which is filled into the metering chamber as a result of the user's content injection operation, is set at the end of the injection operation itself as follows: "metering chamber inflow valve: closed, metering chamber outflow valve: set to the "open" state.

As a result, the user can obtain a natural injection operation feeling that the contents of the fixed quantity chamber are injected, for example, by pressing the injection operation itself.

In this specification, the terms "upper" and "lower" indicate the positional relationship of the illustrated aerosol product in an inverted state.

For example, when the injection operation part is pushed down, the content of the container body is filled in the metering chamber of "inflow valve open, outflow valve closed", and when the operation part is restored after the push-down operation, the "inflow valve We have already proposed a constant injection mechanism that injects the contents of a constant amount chamber by closing the valve and opening the outflow valve (see Patent Document 1).

This fixed amount injection mechanism is convenient in that a substantially constant amount of the content is once stored in the fixed amount chamber and then injected into the external space region each time the operation unit is returned to operation after one push-down operation. is.

However, the content contained in the metering chamber is ejected to the external space area when the operation unit returns to the rest mode position after the user has finished the push-down operation and released the operation unit. be. That is, the contents are not jetted to the external space area in the state of the pressing operation.

Therefore, there is still room for improvement in that users who are unfamiliar with such aerosol-type products in which a fixed quantity is sprayed may feel uncomfortable that the content is not sprayed even if the user pushes down the product. .

WO2012/032638

As described above, in the case of a constant injection mechanism in which the contents of the container main body are filled into the constant quantity chamber with the "inflow valve open, outflow valve closed" and the contents of the constant quantity chamber are injected into the external space area along with the contents injection operation. , "inflow valve closed, outflow valve open" state is set when the operating unit returns to the initial state after the injection operation is completed.

For this reason, the user may feel uncomfortable, for example, that the contents of the metering chamber will not be ejected by the content ejection operation itself (with the operation portion being pressed down), such as by pressing the operation portion.

In the present invention, in the metering chamber between the inflow valve and the outflow valve, a series of operations from filling the metering chamber with the content of the container body to jetting the filled content are performed by various injection operations such as pushing down and pushing up. , to eliminate a sense of incongruity in the content injection operation.

The present invention solves the above problems as follows.
(1) Based on the injection operation to the aerosol container, an outflow valve for injecting the contents (for example, an outward annular tapered surface 4f and annular upper edge portions 7b, 8b, and 11b, which will be described later) is closed, and the contents are When an inflow valve (for example, a horizontal hole 4c and an annular gasket 4d to be described later) made up of a passage-like stem (for example, a stem 4 to be described later) is opened, a metering chamber (for example, a metering chamber to be described later) between this inflow valve and the outflow valve is opened. The content flows into the chamber A) from the container body side, and at the end of the injection operation, the inflow valve is closed and the outflow valve is opened, so that the content that has flowed into the quantitative chamber is injected to the outside. In the fixed injection mechanism of the aerosol container that
a first elastic member (for example, a vertical inner coil spring 4h described later) that biases the stem to the closed state of the inflow valve;
driven members (for example, driven members 6 and 10 described later) interlocked with the injection operation;
A driven member (for example, driven members 7, 8, and 11 described later) sets the open/closed state of the outflow valve between itself and the stem, and moves the stem to the open state of the inflow valve. )and,
A connecting portion (for example, a ball body C described later) comprising a second elastic member (for example, horizontal coil springs 7g, 8h, and 11h described later) for connecting and moving the driven member and the driven member in an integrated state. , cam bodies 8f, 11f, an inwardly directed annular tapered surface 6a, and an upwardly directed annular surface 10a),
The outflow valve is
The closed state is set by the movement of the driven member with respect to the stem in the integrated state accompanying the injection operation, and this continues until the coupling action portion transitions to the uncoupled state at the end of the injection operation,
The inflow valve is set to an open state by the movement of the driven member and the stem in the integrated state accompanying the injection operation, and the first elastic member accompanying the transition to the disconnection state of the connection action part. changes to the closed state due to the stem return action of
A configuration mode is used.
(2) In (1) above,
The driven member is
Consists of an inner tubular portion (for example, the innermost vertical tubular portions 7c, 8c, 11c described later) and its outer tubular portion (for example, the outermost vertical tubular portions 7d, 8d, 11d described later),
The inner cylindrical portion moves relative to the stem to set the open/closed state of the outflow valve,
wherein the connecting action portion is disposed on the outer cylindrical portion,
A configuration mode is used.
(3) In (2) above,
The connection action part is
The integrated state is set by the urging action of the second elastic member, and the cam action with the cam driving portion (for example, an inwardly directed annular tapered surface 6a and an upwardly directed annular surface 10a, which will be described later) at the final stage of the injection operation. With a connection setting part (for example, a ball body C and cam bodies 8f and 11f described later) that cancels the integrated state,
A configuration mode is used.
(4) In (3) above,
The cam driven part is
A cam surface (for example, an inwardly directed annular tapered surface 6a described later) formed on the driven member,
The connection setting part is
A spherical surface that follows the cam surface (for example, a ball body C and a spherical convex portion 8g described later),
A configuration mode is used.

An object of the present invention is a fixed quantity injection mechanism for an aerosol container having such a configuration.

According to the present invention, by adopting the above configuration, a substantially constant amount of the content is temporarily contained in the fixed amount chamber and then injected into the external space region by a single injection operation such as pressing the scalp, for example. Realization of a user's natural injection operation feeling can be achieved.

FIG. 4 is an explanatory diagram showing a static mode (inflow valve: closed, outflow valve: open) of the fixed quantity injection mechanism using a ball body according to the present invention; FIG. 2 is an explanatory view showing an injection operation initial mode (driven member 6 and driven member 7: connected and moved upward in the drawing, inflow valve: closed, outflow valve: closed) following FIG. 1; FIG. 3 is an explanatory view showing an injection operation intermediate mode following FIG. 2 (driven member 6 and driven member 7: connected and moved upward in the drawing, inflow valve: open, outflow valve: closed); FIG. 4 is an explanatory diagram showing a stem top dead center mode following FIG. 3 (driven member 6 and driven member 7: immediately after completion of connecting movement upward in the figure, inflow valve: open, outflow valve: closed); FIG. 5 is an explanatory view showing a stem bottom dead center return mode following FIG. 4 (driven member 7: independent movement downward in the drawing, inflow valve: closed, outflow valve: closed); FIG. 6 is an explanatory diagram showing an injection mode/injection operation end mode (inflow valve: closed, outflow valve: open) following FIG. 5 ; FIG. 10 is an explanatory view showing a stationary mode (inflow valve: closed, outflow valve: open) of a constant injection mechanism using a cam body (Part 1) of the present invention; FIG. 10 is an explanatory view showing a static mode (inflow valve: closed, outflow valve: open) of the constant injection mechanism using the cam body of the present invention (Part 2);

A mode for carrying out the present invention will be described with reference to FIGS. 1 to 8. FIG.

As noted above, the terms "upper" and "lower" respectively refer to the orientation of the illustrated aerosol product in inverted use. For example, the stem is described as being biased downward rather than upward by a coil spring.

The following symbols are used in FIGS.
1 to 6, the driven member 8 is used only in FIG. 7, and the shoulder cover 9, driven member 10 and driven member 11 are used only in FIG.

here,
A is a constant volume inner space area continuously set between the inflow valve and the outflow valve, and a constant volume chamber in which the contents to be injected are accommodated;
B is the injection target site such as the scalp to which the content contained in the quantitative chamber A is injected;
C is arranged outside the aerosol container 1, and at the end of the injection operation itself, the inflow valve (horizontal hole 4c and stem gasket 4d to be described later) of the metering chamber A is closed, and the outflow valve (outward annular A ball body (see the driven member 7 described later) for ejecting the contents contained in the metering chamber A into an external space area by setting the tapered surface 4f and the annular upper edge portion 7b) to an open state,
are shown respectively.

again,
1 is an aerosol container containing a content to be sprayed and a liquefied gas as a propellant;
2 is a mounting cup attached to the lower opening of the aerosol container;
3 is a housing for contents passage fitted and fixed to the mounting cup 2;
3a is an opening formed in the peripheral surface of the housing 3 for inflow of contents;
are shown respectively.

again,
4 is a stem whose upper portion is arranged inside the housing 3 and exhibits a well-known inflow valve action and an outflow valve action with an annular upper edge portion 7b of the follower member 7, which will be described later;
4a is the upper portion of the stem that exhibits an inflow valve action;
4b is a stem lower portion that engages with the stem upper portion 4a to exhibit an outflow valve action;
4c is a total of two horizontal holes formed in the stem upper portion 4a to constitute an inflow valve;
4d is a well-known annular gasket that constitutes an inflow valve between the outer opening side of the horizontal hole portion 4c;
4e is a total of two vertical holes formed in the stem lower portion 4b for passing contents;
4f is formed on the lower end side of the stem lower portion 4b and forms an outflow valve with an annular upper edge portion 7b, which will be described later;
4g is an upward annular stepped portion formed on the upper side of the outer peripheral surface of the stem lower portion 4b to set a relative substantially downward movement limit of the driven member 7, which will be described later;
4h is a vertical inner coil spring disposed inside the housing 3 for urging the stem 4 (inflow valve) to the closed state;
are shown respectively.

again,
5 is a shoulder cover (upper shoulder cover 5a + lower shoulder cover 5b) fitted and fixed to the mounting cup 2;
5a is an upper shoulder cover directly fitted to the mounting cup 2;
5b is a lower shoulder cover fitted to the upper shoulder cover 5a;
Reference numeral 5c denotes a portion of the upper shoulder cover 5a, which is a downward annular surface that always receives the upper end side of a vertical outer coil spring 6d, which will be described later.
Reference numeral 5d denotes a part of the lower shoulder cover 5b, which is an upward annular surface for receiving a driven member 6, which will be described later, in the static mode of FIG.
are shown respectively.

again,
Reference numeral 6 denotes an outer cylindrical driven member which is held by the upward annular surface 5d of the lower shoulder cover 5b in the static mode of FIG.
6a is formed on the upper end portion of the tubular portion of the driven member 6 so as to descend inwardly, and has an inwardly directed annular tapered surface that exerts a contact action with the ball body C in the static mode (see FIGS. 1 to 3).
6b is an annular inner peripheral surface continuing downward from the inwardly directed annular tapered surface 6a;
6c is an outer lower annular surface formed on the outer lower side of the annular inner peripheral surface 6b at a portion facing the downward annular surface 5c;
6d is a vertical outer coil spring for biasing the driven member disposed between the downward annular surface 5c and the outer lower annular surface 6c;
Reference numeral 6e denotes an annular lower end surface that contacts the upward annular surface 5d of the lower shoulder cover 5b due to the downward elastic force of the vertical outer coil spring 6d in the stationary mode;
Reference numeral 6f denotes a central ring convex portion for contacting the injection target portion B such as the scalp and moving the entire driven member 6 upward in the drawing with respect to the lower shoulder cover 5b when the content is to be injected.
are shown respectively.

again,
7 is disposed inside the driven member 6 in a manner to follow it, and as a whole is an inner cylindrical member that drives the horizontal hole portion (inflow valve) 4c of the upper stem portion 4a to the open state by the operation of injecting the contents. driven member,
7a is a vertical hole formed in the center of the bottom portion of the quantitative chamber A for injecting the contents;
7b is the upper opening side of the vertical hole portion 7a and is an annular upper edge portion that exhibits an outflow valve action between it and the outward annular tapered surface 4f;
7c is an innermost vertical cylindrical portion that engages with the outer peripheral surface of the stem lower portion 4b (such as the upward annular stepped portion 4g) and is capable of relative movement in the vertical direction with respect to this outer peripheral surface;
7d is the outermost vertical cylindrical portion whose cross section is substantially concentric with the innermost vertical cylindrical portion 7c;
7e is a total of four horizontal tubular parts formed on the outer peripheral surface of the outermost vertical tubular part at equal intervals in the circumferential direction so as to protrude outward;
7f is a joint cover that is fitted and held in the horizontal cylindrical portion 7e to guide and hold the ball body C;
A horizontal coil spring 7g is disposed inside the horizontal cylindrical portion 7e and biases the ball body C toward the inward annular tapered surface 6a and the annular inner peripheral surface 6b.
are shown respectively.

Also, in FIG.
8 is disposed inside the driven member 6 in a manner to follow it, and as a whole is an inner cylindrical member that drives the horizontal hole portion (inflow valve) 4c of the upper stem portion 4a to the open state by the operation of injecting the contents. driven member,
8a is a vertical hole formed in the center of the bottom portion of the quantitative chamber A for injecting the content;
8b is the upper opening side of the vertical hole portion 8a and is an annular upper edge portion that exhibits an outflow valve action between the outwardly directed annular tapered surface 4f;
8c is an innermost vertical cylindrical portion that engages with the outer peripheral surface of the stem lower portion 4b (such as the upward annular stepped portion 4g) and is capable of relative movement in the vertical direction with respect to this outer peripheral surface;
8d is the outermost vertical cylindrical portion whose cross section is substantially concentric with the innermost vertical cylindrical portion 8c;
8e is a total of four horizontal pieces formed on the outer peripheral surface of the outermost vertical cylindrical portion at equal intervals in the circumferential direction so as to protrude outward;
8f is a cam body rotatably supported at the tip of the horizontal piece 8e;
8g is a spherical projection provided on the outer surface of the cam body 8f;
8h is disposed between the inner surface of the cam body 8f and the outer surface of the outermost vertical cylindrical portion 8d, and the spherical convex portion 8g of the cam body 8f is directed toward the inward annular tapered surface 6a and the annular inner peripheral surface 6b. A horizontal coil spring for biasing the spherical convex portion,
are shown respectively.

8, 9 is a shoulder cover (upper shoulder cover 9a+lower shoulder cover 9b) fitted and fixed to the mounting cup 2;
9a is an upper shoulder cover directly fitted to the mounting cup 2;
9b is a lower shoulder cover fitted to the upper shoulder cover 9a;
Reference numeral 9c denotes a portion of the upper shoulder cover 9a, which is a downward annular surface that normally receives the upper end side of a longitudinal outer coil spring 10d, which will be described later.
Reference numeral 9d denotes a part of the lower shoulder cover 9b, which is an upward annular surface for receiving a driven member 10, which will be described later, in the static mode of FIG.
9e is an inward annular tapered surface provided inside the downward annular surface 9c;

8, reference numeral 10 denotes an outer cylindrical driven member which is held by the upward annular surface 5d of the lower shoulder cover 5b in the static mode of FIG.
Reference numeral 10a denotes an upper end portion of the cylindrical portion of the driven member 10, which is an upward annular surface that engages with a downward step portion 11g described below in a stationary mode or the like;
10b is an annular inner peripheral surface continuous from the upward annular surface 10a to the lower inner side thereof;
10c is an outer lower annular surface formed on the outer lower side of the annular inner peripheral surface 10b at a portion facing the downward annular surface 9c;
10d is a vertical outer coil spring for biasing the driven member disposed between the downward annular surface 9c and the outer lower annular surface 10c;
Reference numeral 10e designates an annular lower end surface that contacts the upward annular surface 9d of the lower shoulder cover 9b due to the downward elastic force of the vertical outer coil spring 10d in the stationary mode;
Reference numeral 10f designates a central ring convex portion for contacting a portion to be injected such as the scalp to move the entire driven member 10 upward in the drawing with respect to the lower shoulder cover 9b when the content is to be injected.

Further, in FIG. 8, 11 is disposed inside the driven member 10 so as to follow it, and as a whole, the horizontal hole portion (inflow valve) 4c of the stem upper portion 4a is driven to the open state by the operation of injecting the contents. inner cylindrical driven member,
11a is a vertical hole formed in the center of the bottom of the quantitative chamber A for injecting the contents;
11b is the upper opening side of the vertical hole portion 11a and is an annular upper edge portion that exhibits an outflow valve action between the outwardly directed annular tapered surface 4f;
Reference numeral 11c denotes an innermost vertical tubular portion that engages with the outer peripheral surface of the stem lower portion 4b (such as the upward annular stepped portion 4g) and is capable of moving relative to the outer peripheral surface in the vertical direction.
11d is the outermost vertical cylindrical portion whose cross section is substantially concentric with the innermost vertical cylindrical portion 11c;
11e is a total of four horizontal pieces formed on the outer peripheral surface of the outermost vertical cylindrical portion at equal intervals in the circumferential direction so as to protrude outward;
11f is a cam body rotatably supported at the tip of the horizontal piece 11e;
11g is a downward step provided on the outer surface of the cam body 11f;
A horizontal coil spring 11h is disposed between the inner surface of the cam body 11f and the outer surface of the outermost vertical tubular portion 11d to bias the downward stepped portion 11g of the cam body 11f toward the annular inner peripheral surface 6b.
are shown respectively.

Here, the housing 3, the stem 4, the shoulder covers 5, 9, the driven members 6, 10, and the driven member 7, except for the longitudinal inner coil springs 4h, the longitudinal outer coil springs 6d, 10d, and the lateral coil springs 7g, 8h, 11h. , 8 and 11 are made of plastic such as polypropylene, polyethylene, polyacetal, nylon and polybutylene terephthalate.

The aerosol container 1, ball body C, vertical inner coil spring 4h, vertical outer coil springs 6d and 10d, and horizontal coil springs 7g, 8h and 11h are made of plastic or metal, for example. The mounting cup 2 is made of metal, for example.

In the static mode of Fig. 1,
(11) Ball body C, stem 4 and driven member 6 move to their respective outermost or lowest positions by the elastic forces of horizontal coil spring 7g, longitudinal inner coil spring 4h and longitudinal outer coil spring 6d. ,
(12) At this time, the ball C abuts against the inwardly tapered surface 6a of the driven member 6, and the stem 4 closes the lateral hole 4c of the stem 4 with the entire annular gasket 4d holding it closed in a substantially annular planar manner. The driven member 6 is set such that the annular lower end surface 6e thereof is in contact with the upward annular surface 5d of the lower shoulder cover 5b,
(13) The metering chamber A is set so that its inflow valve (horizontal hole 4c and annular gasket 4d) is closed and its outflow valve (outward annular tapered surface 4f and annular upper edge portion 7b) is open. The metering chamber A has its inflow valve closed and is set to communicate with the external space through the open outflow valve and the vertical hole 7a of the follower member 7 .

FIG. 2 shows a state immediately after the center annular convex portion 6f of the driven member 6 in the stationary mode is pressed against the injection target portion B. As shown in FIG.

At this time, the driven member 6 and the driven member 7 move upward in the drawing as an integrated body via the ball body C and the horizontal coil spring 7g, and the annular upper edge portion 7b is the outward annular tapered surface of the stem lower portion 4b. It abuts on 4f. That is, the outflow valve has shifted to the closed state. The inlet valve of the stem upper part 4a remains closed as in the static mode.

FIG. 3 shows the state of the content flowing into the metering chamber when the central annular convex portion 6f of the driven member 6 is further pressed against the ejection target portion B. As shown in FIG.

At this time, the driven member 6 and the driven member 7 are connected and moved upward in FIG. The stem 4 exhibits a well-known inflow valve action along with this interlocking. That is, the inner portion of the annular gasket 4d is displaced upward, and the effect of closing the horizontal hole portion 4c is lost.

As shown in FIG. 3, when the inflow valve of the metering chamber A is opened and the outflow valve is closed, the contents of the aerosol container 1 pass through the peripheral surface opening 3a of the housing 3 and the horizontal hole 4c of the stem upper portion 4a. It flows into the metering chamber A and is accommodated.

The metering chamber A is roughly the inner space of the stem on the downstream side of the inflow valve and the outer annular space of the innermost vertical tubular portion 7c on the upstream side of the outflow valve.

The reason why the driven member 6 and the driven member 7 can be connected and moved together as shown in FIG.

That is, due to the magnitude relationship of this elastic force, the stem 4 moves in a state of being integrated with the stem driven member 7 until it moves to the top dead center in the drawing when the driven member 6 moves upward during the content injection operation. At this time, the lateral coil spring 7g with respect to the ball body C is substantially not displaced.

After the stem 4 has moved to the top dead center, the ball body C is guided by the inward annular tapered surface 6a of the driven member 6 that moves upward by the operation of injecting the contents (upward movement of the driven member 6). It moves inward while resisting the biasing force of the horizontal coil spring 7g, and separates from this tapered surface to the annular inner peripheral surface 6b.

FIG. 4 shows a state immediately after the ball body C has separated from the inwardly directed annular tapered surface 6a of the driven member 6 to the annular inner peripheral surface 6b at the substantially final stage of the content ejection operation.

At this time, the stem 4 is still in the inflow valve open state against the elastic force of the vertical inner coil spring 4h.

FIG. 5 shows that the stem 4 returns to its initial position by the elastic force of the vertical inner coil spring 4h as the ball body C is separated from the inward annular tapered surface 6a following FIG. This indicates that the valve has transitioned to the closed state.

At this time, the content injection operation itself is still in the final stage, and the metering chamber A is in a closed state in which the content to be injected is accommodated.

FIG. 6 shows, as in FIG. 5, that the content contained in metering chamber A is injected into the external space area at the end of the content injection operation itself (not after the injection operation has ended).

The content pressure applied to the inner surface portion of the driven member 7 constituting the metering chamber A is uniform per unit area, and the total pressure applied to the upper inner surface and the lower inner surface is greater on the lower inner surface having a larger area.

Therefore, the driven member 7 as a whole receives the pressure of the contents downward in the drawing and moves downward, and the annular upper edge portion 7b thereof is separated from the outward annular tapered surface 4f of the stem lower portion 4b. That is, the outflow valve is opened, and the content contained in the metering chamber A is jetted from the outflow valve through the vertical hole portion 7a.

After that, when the pressing of the central ring convex portion 6f against the injection target portion B is released, the driven member 6 is returned to the stationary mode position shown in FIG. 1 by the action of the longitudinally outer coil spring 6d. At this time, the ball body C also returns from the annular inner peripheral surface 6b to the inward annular tapered surface 6a.

7 replaces the ball body C and the driven member 7 shown in FIGS.

The tip of the horizontal piece 8e is inserted into the inner concave portion of the cam body 8f, and the lower side of the tip of the horizontal piece 8e is supported so as to serve as a rotation shaft.

Except that the spherical convex portion 8g of the cam body 8f provided on the driven member 8 exhibits the same action as the ball body C in FIGS. The same depressing operation as in the fixed quantity injection mechanism of FIGS.

8 replaces the ball body C, the shoulder cover 5, the driven member 6 and the driven member 7 of FIGS. A tapered surface 9e is newly provided, a downward stepped portion 11g is provided instead of the ball body C, and an upward annular surface 10a is provided instead of the inward annular tapered surface 6a.

The tip of the horizontal piece 11e is inserted into the hole on the lower end side of the cam body 11f. is supported so that the lower end of the is used as a rotation axis.

From the stationary mode of FIG. 8 to the stem top dead center mode (corresponding to FIG. 4) by pressing the center ring convex portion 10f of the driven member 10 against the injection target site, the downward stepped portion of the cam body 11f 11g is engaged with the upward annular surface 10a, the driven member 10 and the driven member 7 move upward together.

When the stem top dead center mode (corresponding to FIG. 4) is reached, the cam body 11f comes into contact with the inward annular tapered surface 9e, and the downward stepped portion 11g displaces inward to disengage the upward annular surface 10a. When released, the driven member 11 is moved downward by the urging force of the stem 4, goes through the stem bottom dead center return mode (corresponding to FIG. 5), and enters the injection mode/injection operation end mode (corresponding to FIG. 6). is jetted from the vertical hole portion 11a.

After that, when the pressing of the central annular convex portion 10f against the ejection target site is released, the driven member 10 returns to the stationary mode position by the action of the longitudinally outer coil spring 10d. At this time, the locked state between the downward stepped portion 11g of the cam body 11f and the upward annular surface 10a is also restored.

Thus, in the present invention, the operation of injecting the contents of the metering chamber is performed at the operation end stage as part of the contents injection operation. The injection operation is not performed when the content injection operation is finished.

The fixed quantity injection mechanism shown in the figure is intended for use upside down on the scalp, etc., but the present invention is not limited to this, and is also applicable to upright use with the shoulder covers 5 and 9 facing upward. Of course. In this case, the vertical positional relationship is opposite to that described in this specification.

Aerosol-type products equipped with the above fixed-quantity injection mechanism include various applications such as detergents, cleaning agents, antiperspirants, repellents, insecticides, pharmaceuticals, quasi-drugs, cosmetics, and laundry pastes.

Contents contained in the aerosol container may be in various forms such as liquid, cream and gel. Components to be blended into the contents include, for example, powders, oil components, alcohols, surfactants, polymer compounds, active ingredients suitable for each application, and water.

As the propellant contained in the aerosol container, a liquefied gas such as liquefied petroleum gas or dimethyl ether, or a compressed gas such as carbon dioxide, nitrogen gas, compressed air, oxygen gas, nitrous oxide, or a mixed gas thereof is used.

A: Quantitative chamber B: Injection target site C: Ball body (see driven member 7)

1: Aerosol container 2: Mounting cup 3: Housing 3a: Peripheral opening

4: Stem 4a: Stem upper portion 4b: Stem lower portion 4c: Horizontal hole portion 4d: Annular gasket 4e: Vertical hole portion 4f: Outward annular tapered surface 4g: Upward annular stepped portion 4h: Vertical inner coil spring

5: shoulder cover 5a: upper shoulder cover 5b: lower shoulder cover 5c: downward annular surface 5d: upward annular surface

6: driven member 6a: inward annular tapered surface 6b: annular inner peripheral surface 6c: outer lower annular surface 6d: vertical outer coil spring 6e: annular lower end surface 6f: central annular convex portion

7: Driven member 7a: Vertical hole portion 7b: Annular upper edge portion 7c: Innermost vertical tubular portion 7d: Outermost vertical tubular portion 7e: Horizontal tubular portion 7f: Joint cover 7g: Horizontal coil spring

(Fig. 7)
8: Driven member 8a: Vertical hole portion 8b: Annular upper edge portion 8c: Innermost vertical tubular portion 8d: Outermost vertical tubular portion 8e: Horizontal piece portion 8f: Cam body 8g: Spherical convex portion 8h: Horizontal coil spring

(Figure 8)
9: shoulder cover 9a: upper shoulder cover 9b: lower shoulder cover 9c: downward annular surface 9d: upward annular surface 9e: inward annular tapered surface

(Figure 8)
10: driven member 10a: upward annular surface 10b: annular inner peripheral surface 10c: outer lower annular surface 10d: vertical outer coil spring 10e: annular lower end surface 10f: central annular convex portion

(Figure 8)
11: Driven member 11a: Vertical hole portion 11b: Annular upper edge portion 11c: Innermost vertical tubular portion 11d: Outermost vertical tubular portion 11e: Horizontal piece portion 11f: Cam body 11g: Downward stepped portion 11h: Horizontal coil spring

Claims (4)

Based on the injection operation to the aerosol container, the outflow valve for injecting the content is closed, and when the outflow valve is closed, the inflow valve consisting of a stem in the form of a content passage is opened, so that the volume between this inflow valve and the outflow valve is fixed. An aerosol in which the content flows into the chamber from the container body side, and the content that has flowed into the fixed amount chamber is jetted to the outside by closing the inflow valve and opening the outflow valve at the end of the injection operation. In the fixed quantity injection mechanism of the container,
a first elastic member that biases the stem toward the closed state of the inflow valve;
a driven member that interlocks with the injection operation;
a driven member that follows the driven member to set the open/closed state of the outflow valve between itself and the stem and move the stem to the open state of the inflow valve;
a connecting action part comprising a second elastic member for connecting and moving the driven member and the driven member in an integrated state;
The outflow valve is
The closed state is set by the movement of the driven member with respect to the stem in the integrated state accompanying the injection operation, and this continues until the coupling action portion transitions to the uncoupled state at the end of the injection operation,
The inflow valve is set to an open state by the movement of the driven member and the stem in the integrated state accompanying the injection operation, and the first elastic member accompanying the transition to the disconnection state of the connection action part. changes to the closed state due to the stem return action of
A constant injection mechanism for an aerosol container characterized by: The driven member is
consisting of an inner tubular portion and its outer tubular portion,
The inner cylindrical portion moves relative to the stem to set the open/closed state of the outflow valve,
The connecting action portion is disposed on the outer tubular portion,
A fixed quantity injection mechanism for an aerosol container according to claim 1, characterized in that: The connection action part is
The integrated state is set by the biasing action of the second elastic member, and has a connection setting portion that cancels the integrated state in accordance with the cam action with the cam driven portion at the final stage of the injection operation. ,
3. A fixed quantity injection mechanism for an aerosol container according to claim 2, characterized in that: The cam driven part is
A cam surface formed on the driven member,
The connection setting part is
A spherical surface that follows the cam surface,
4. A fixed quantity injection mechanism for an aerosol container according to claim 3, characterized in that:

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