JP2007204138A - Constant volume injection mechanism for aerosol receptacle and aerosol receptacle with constant volume injection mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of component parts of a constant volume injection mechanism while assuring its positive operation, simplify an assembling step for its product and reduce its cost. <P>SOLUTION: A constant volume space is formed between an inlet valve at a stem side 3 (a lateral hole 3b and a stem gasket) and an output valve at a button side 5 (a truncated cone shaped part 4a and a small diameter suspending part 5a). When the button 5 is depressed, the inlet valve is opened and when the output valve is closed, stored content in an aerosol receptacle flows into the constant volume space. After this operation, when a depressing operation for the button 5 is released, the stem side 3 moves up and the inlet valve is closed. Then, the button 5 is moved up to a valve seat 4 (integral with the stem 3) in response to a pressure of the stored content stored in the constant volume space, the output valve is moved from its closed state to an open state shown in the drawing, and the stored content in the constant volume space is injected out of an injection port 6b to an external space. In this way, this invention eliminates a resilient member placed between the valve seat 4 and the button 5 for use in biasing the output valve to its open state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a quantitative injection mechanism used for aerosol products.
In particular, when the operation part of an aerosol type product is pressed from its stationary mode, for example, the stem inflow valve opens and the contents flow into the fixed space between the closed output valve and the operation part The present invention relates to a fixed-quantity injection mechanism in which an inflow valve is closed and an output valve is opened when returning to a stationary mode by operation release.

This quantitative injection mechanism
-For example, by pressing the operation unit in the stationary mode to open the stem inflow valve, the contents are allowed to flow into and stored in the quantitative space region between the inflow valve and the operation unit side output valve in the closed state,
-The output valve opens based on the return operation of the stem when the operation is released, and the contents in the quantitative space area are injected into the external space.
Of the type.

  Here, in the above-described quantitative injection mechanism, it is of course desirable to reduce the number of components as much as possible while ensuring a reliable operation, and the present invention meets such a demand.

  The applicant of the present invention already has a fixed injection mechanism of the above type, that is, not at the time of pressing the operation button, but with the return operation of the operation button when the pressing operation is released (the stem inflow valve and the operation unit side output valve). A quantitative injection mechanism has been proposed that injects the contents of a quantitative space region (see Fig. 1). In the following description, numerals with [] indicate reference numbers in Patent Document 1.

This quantitative injection mechanism
1. Stem [3] (= stem of the present invention)
2. Valve seat [10] attached to the stem (corresponding to the base of the present invention)
3. Injection button body [20] set in such a manner that it can be moved up and down with respect to the integral member of the stem and the valve seat (corresponding to the operation unit of the present invention)
4. A coil spring [15] provided between the valve seat and the injection button body to urge the button body upward
It consists of structural members.

  The annular valve seat [17] of the valve seat portion [10] and the annular valve body [27] of the injection button main body [20] constitute an output valve in a quantitative space region.

  In the stationary mode in which the injection button body [20] is not depressed, the output valve is closed by the elastic force of the coil spring [15]. At this time, of course, the so-called inflow valve of the stem [3] (= the valve comprising the stem peripheral surface hole for passing the contents and the stem gasket for opening and closing the same) is closed by the action of a known coil spring. .

  When the injection button body [20] is pushed down from the position of the stationary mode, first, only the button body moves downward while resisting the elastic force of the coil spring [15], and the output valve is closed.

  After the output valve is closed, the stem [3], the valve seat [10], and the injection button body [20] are integrated, that is, the output valve is closed and the stem inflow valve is opened. An object enters the quantitative space area.

Next, when the user stops the push-down operation of the injection button, the stem [3] is moved up by the elastic action of the coil spring (for the stem), the inflow valve is closed, and the injection button body [20] Due to the elastic action of the coil spring [15] (relative to the valve seat [10]), the output valve in the fixed space area opens. Therefore, only the contents in the quantitative space area are injected into the external space.
JP 2003-29991 A

  As a result of further consideration, examination, and trial production of the above-described quantitative injection mechanism, the applicant of the present application can return the stem to the stationary mode even if the coil spring [15] for energizing the injection button body is omitted. At that time, it was verified that the output valve of the quantitative space region is in an “open” state by the pressure of the content, that is, the content of the quantitative space region is reliably injected into the external space.

  In the present invention, attention is paid to the fact that the quantitative injection function of the contents is not impaired even if the coil spring for energizing the injection button, which is a component of the quantitative injection mechanism proposed in Patent Document 1, is discarded. Accordingly, it is an object of the present invention to simplify the assembly process of the product and reduce the cost by reducing the number of component parts while ensuring a reliable operation.

The present invention solves the above problems as follows.
(1) A stem (for example, a stem 3 described later) constituting an inflow valve as a valve function of the aerosol container, and a passage area (for example, an L-shaped groove portion 4b described later) attached to the output side of the stem. From a base for forming a quantitative space region (for example, a valve seat 4 described later) and an operation unit for forming a quantitative space region that is movable with respect to the base and has a passage region for contents (for example, a push button 5 described later) In addition, a part of the base part and a part of the operation part form an output valve (for example, a truncated cone part 4a and an annular small diameter hanging part 5a described later),
When the operation unit in the stationary mode is operated and the output valve is closed, the stem moves to an open state of the inflow valve (for example, a lateral hole portion 3b and a stem gasket, which will be described later). The inflow valve is closed when the contents flow into the quantitative space area (for example, the quantitative space area A described later) from the output valve to the output valve, and then the operation is released and the stem returns to the stationary mode. In the quantitative injection mechanism in which the contents of the quantitative space region are injected into the external space by opening the output valve,
The elastic member between the base and the operation unit for urging the output valve to the open state is omitted, and when the stem returns from the content inflow mode to the stationary mode, the output valve Transition from the previous closed state to the open state based only on the pressure of the contents in the quantitative space region,
Take an embodiment.

  The quantitative injection mechanism having such a configuration and the aerosol type product provided with the quantitative injection mechanism are the objects of the present invention.

  In the present invention, the coil spring for urging the injection button, which is a component of the above-described quantitative injection mechanism already proposed by the present applicant, is omitted, so that the product assembly process can be simplified and the cost can be reduced. be able to. In addition, a reliable quantitative injection operation as the premise is ensured.

  The best mode for carrying out the present invention will be described with reference to FIGS.

here,
FIG. 1 shows the stationary mode of the metering injection mechanism of the present invention (= the state where the push button is not operated and the stem side inflow valve and the push button side output valve are both closed),
FIG. 2 shows a content inflow mode (= a state in which the push button is pressed, the inflow valve is opened, and the output valve is kept closed) into the quantitative space region of the injection mechanism of FIG.
FIG. 3 shows a content discharge mode (= a state in which the push button is released, the inflow valve is closed, and the output valve is opened) from the quantitative space region of the injection mechanism of FIG.

  The constituent elements (for example, the passage area 3a) of the following reference numbers with alphabets indicate that they are part of the constituent elements (for example, the stem 3) of the numeral portion of the reference numbers in principle.

1-3,
A is a continuous quantitative space from the inflow valve of the stem part to the output valve of the push button part (see Fig. 1),
B shows the contents inflow from the container body into the fixed space area (see Fig. 2),
C shows the contents released from the quantitative space area to the external space (see Fig. 3),
1 is a mounting cap attached to the opening end side of a container body (not shown) of an aerosol type product containing the contents and the gas for injection described later;
2 is a housing attached to the central part of the mounting cap 1,
The lower portion 3 is disposed inside the housing 2 and is urged upward by the elastic action of a well-known coil spring (not shown) to act as a valve action together with a well-known stem gasket (not shown). = Inflow valve action of quantitative space region A)
3a is the passage area for the contents,
3b is a lateral hole part constituting the inflow valve of the fixed space area A,
4 is a cylindrical valve seat portion that is tightly fitted to the outer peripheral surface of the output side of the stem 3 and interlocks in the vertical direction in the figure, and exhibits a valve action (= output valve action in the quantitative space region A) together with a push button described later. ,
4a is a central frustoconical portion that constitutes the output valve of the fixed space A,
4b is a plurality of L-shaped grooves (holes) that are formed in the ceiling portion of the valve seat portion (≈ truncated cone portion 4a) and each act as a passage area for the contents,
4c is an annular reverse skirt that abuts an inner peripheral surface of a small-diameter hanging portion 5a, which will be described later, and exhibits a sealing action and defines a quantitative space area A;
4d is an annular shape that is formed on the outer peripheral surface of the valve seat portion (the lower portion of the reverse skirt portion) and restricts at least the upward movement position (see FIG. 3) of a push button 5 described later with respect to the valve seat portion. Concave part,
5 is a push button that can move up and down with respect to the valve seat portion 4 and constitutes an output valve in the quantitative space region together with the valve seat portion;
5a is an annular small diameter hanging part corresponding to the truncated cone part 4a,
5b is an annular large-diameter hanging portion formed outside the small-diameter hanging portion,
5c is an annular convex portion formed in a mode corresponding to the concave portion 4d at the lower portion of the inner peripheral surface of the large diameter hanging portion,
6 is a cylindrical injection piece attached to the output side of the push button 5,
6a is the passage area of the contents,
6b is a jet of contents,
Respectively.

  Here, the housing 2, the stem 3, the valve seat 4, the push button 5, the injection piece 6, and the like are made of plastic made of polypropylene, polyethylene, polyacetal, nylon, polybutylene terephthalate, or the like.

  In the stationary mode of FIG. 1, the stem 3 moves up based on the elastic force of a coil spring (not shown) as in the case of a normal aerosol type product, and the side hole 3b of the stem is a well-known stem gasket (not shown). It is blocked. That is, the inflow valve in the quantitative space region A is in the “closed” state.

  The push button 5 is in a state where the inner lower end portion of the small-diameter hanging portion 5a is in contact with the truncated cone portion 4a of the valve seat portion 4 (integrated with the stem 3).

  Note that the degree of opening of the output valve in the previous content discharge mode (see FIG. 3) (= the interval between the truncated cone portion 4a and the small diameter hanging portion 5a), the inner peripheral surface of the large diameter hanging portion 5b and the valve seat Depending on the magnitude of the frictional force between the part 4 and the reverse skirt part 4c, the stationary mode may be such that the inner lower end part and the truncated cone part 4a are slightly separated.

  The content inflow mode of FIG. 2 is a state in which the user presses the operation button 5 in the stationary mode, and the operation button, the valve seat portion 4 and the stem 3 are pressed together.

  At this time, the inner lower end portion of the small-diameter hanging portion 5a (operation button 5) is in close contact with the truncated cone portion 4a of the valve seat portion 4, and the lateral hole portion 3b of the stem 3 is a normal aerosol type product. Similarly, it is released from the blockage by the stem gasket so far.

  In other words, the inflow valve in the quantitative space area A is opened and the output valve is closed, and the contents of the container body enter the quantitative space area and are stored as indicated by the arrow B. Here, the content is “horizontal hole part 3b−passage area 3a−L-shaped groove part” in the upper quantitative space area A (see FIG. 1) formed between the valve seat part 4 and the push button 5. 4b "and then flows in.

In the content release mode of FIG. 3, the user releases the pressing operation of the operation button 5,
(1) The stem 3 is moved up by the elastic force of the coil spring for stem (not shown) and returned to the position shown in FIG. 1, and the lateral hole 3b is made of a stem gasket as in the case of a normal aerosol type product. Occluded,
(2) The push button 5 is moved up with respect to the valve seat portion 4 by the pressure of the contents stored in the fixed space A, and the inner lower end portion of the small diameter hanging portion 5a and the truncated cone shape of the valve seat portion 4 are used. The part 4a is separated,
It is in a state.

  In other words, the inflow valve in the quantitative space area A is closed and the output valve is opened, and the contents stored in the quantitative space area until then are “the inner bottom end portion of the small-diameter hanging part 5a and It is injected into the external space through a gap between the valve seat part 4 and the truncated cone part 4a, a small diameter hanging part 5a, a passage area 6a of the injection piece 6, an injection port 6b, and the like.

  Here, the push button 5 moves upward with respect to the valve seat portion 4 by the pressure of the contents stored in the fixed space A. The lower end surface portion of the small-diameter hanging portion 5a of the push button and the small-diameter hanging portion. This is because the content pressure in the upward direction in the figure acts on each of the ceiling surface portions of the annular space area between 5a and the large-diameter hanging portion 5b.

  In this way, in the present invention, instead of providing a push button return coil spring for opening the output valve in the quantitative space region A, the output valve is "opened" by the pressure of the contents stored in the quantitative space region. Set to state.

  Therefore, the number of parts of the quantitative injection mechanism is reduced by the amount of the coil spring, and the pressing operation of the push button in the stationary mode is lightened.

In order to secure each operation of the content inflow mode of FIG. 2 and the content discharge mode of FIG. 3, regarding the pressure of the stored content in the quantitative space area A,
(11) In the mode of FIG. 2, the load acting on the stem 3 and the valve seat 4 in the downward direction (based on the pressure) is applied to the known coil spring for stem (not shown) in the upward direction. Less than the biasing force, for example 2.0kgf,
(12) In addition, in the mode of FIG. 3, the load acting on the push button 5 in the upward direction (based on the pressure) is caused by the weight of the push button, the reverse skirt portion 4c and the large diameter hanging portion 5b. Greater than the resultant force of friction between,
It is necessary.

  For example, if the requirement (11) is not satisfied, the valve seat 4 and the push button 5 are moved away from each other by the action of the content pressure. For example, the stem 3 and the valve seat 4 are shown in FIG. 2 and the output valve in the fixed volume space A (= the valve structure comprising the truncated cone portion 4a of the valve seat portion 4 and the inner lower end portion of the small diameter drooping portion 5a) is opened, and the normal injection state Because it becomes.

  The load based on the pressure of the contents stored in the quantitative space area A is set to (0.3 to 1.5) kgf, for example. However, this numerical value is merely an example, and it is needless to say that it can be set to any value that satisfies the requirements (11) and (12).

  When the content of the quantitative space area A in the discharge mode of FIG. 3 is injected into the substantially external space and the content pressure of the quantitative space area A disappears, so to speak, the push button 5 moves down somewhat by its own weight. Transition to the state.

  The present invention is not limited to the push button type operation unit described above, but can be applied to various operation units such as a tilt type and a lever type.

  Aerosol products to which the present invention is applied include deodorants, cleaning agents, cleaning agents, antiperspirants, cooling agents, muscle anti-inflammatory agents, hair styling agents, hair treatment agents, hair dyes, hair restorers, cosmetics, Shaving foam, food, droplets (such as vitamins), pharmaceuticals, quasi-drugs, paints, horticultural agents, repellents (insecticides), cleaners, laundry pastes, urethane foams, fire extinguishers, adhesives, lubrication There are various uses such as agents.

  The contents stored in the container main body are, for example, a powdery substance, an oil component, an alcohol, a surfactant, a polymer compound, and an active ingredient corresponding to each application.

  As the powder, metal salt powder, inorganic powder, resin powder, or the like is used. For example, talc, kaolin, aluminum hydroxychloride (aluminum salt), calcium alginate, gold powder, silver powder, mica, carbonate, barium sulfate, cellulose, and a mixture thereof are used.

  As the oil component, silicone oil, palm oil, eucalyptus oil, camellia oil, olive oil, jojoba oil, paraffin oil, myristic acid, palmitic acid, stearic acid, linoleic acid, linolenic acid and the like are used.

  As alcohols, monovalent lower alcohols such as ethanol, monovalent higher alcohols such as lauryl alcohol, polyhydric alcohols such as ethylene glycol, and the like are used.

  Surfactants include anionic surfactants such as sodium lauryl sulfate, nonionic surfactants such as polyoxyethylene oleyl ether, amphoteric surfactants such as lauryldimethylaminoacetic acid betaine, and cations such as alkyltrimethylammonium chloride. A surfactant is used.

  As the polymer compound, methyl cellulose, gelatin, starch, casein and the like are used.

  Active ingredients according to each application include anti-inflammatory analgesics such as methyl salicylate and indomethacin, antibacterial agents such as sodium benzoate and cresol, insect repellents such as Hillesroid and diethyltoluamide, antiperspirants such as zinc oxide, Coolants such as camphor and menthol, anti-asthma drugs such as ephedrine and adrenaline, sweeteners such as sucralose and aspartame, adhesives and paints such as epoxy resin and urethane, dyes such as paraphenylenediamine and aminophenol, dihydrogen phosphate Use a fire extinguishing agent such as ammonium or sodium bicarbonate.

  Further, other than the above-mentioned contents, suspending agents, ultraviolet absorbers, emulsifiers, humectants, antioxidants, sequestering agents and the like can also be used.

  As gas for injecting contents in aerosol type products, compressed gas such as carbon dioxide, nitrogen gas, compressed air, oxygen gas, rare gas, and mixed gas thereof, and liquefied gas such as liquefied petroleum gas, dimethyl ether, and fluorocarbon are used. .

It is explanatory drawing which shows the stationary mode (The state where the push button is unoperated and the inflow valve on the stem side and the output valve on the push button side are both closed) of the present invention. It is explanatory drawing which shows the content inflow mode (= state in which the push button was pushed and the inflow valve opened and the output valve remained closed) of the fixed-quantity space area of this invention. It is explanatory drawing which shows the content discharge | release mode from the fixed_quantity | quantitative_assay area area | region of this invention (= Pressing operation of a pushbutton is cancelled | released, an inflow valve is closed and an output valve is open).

Explanation of symbols

A: Continuous quantitative space from the inflow valve to the output valve (see Fig. 1)
B: Content inflow from the container body to the fixed space area (see Figure 2)
C: Contents released from the quantitative space area to the external space (see Figure 3)
1: Mounting cap 2: Housing 3: Stem 3a: Content passage area 3b: Horizontal hole portion constituting the inflow valve of the quantitative space area A: Cylindrical valve seat part 4a: Output valve of the quantitative space area A Central frustoconical part 4b: L-shaped groove (hole)
4c: annular reverse skirt portion 4d: annular concave portion 5: push button 5a: annular small diameter hanging portion 5b: large diameter hanging portion 5c: annular convex portion 6: cylindrical injection piece 6a: of contents Passage area 6b: Content injection port

Claims (2)

Stem that constitutes an inflow valve as a valve function of an aerosol container, a base for forming a quantitative space region attached to the output side of the stem and having a passage area for the content, and movable relative to the base It consists of an operation part for forming a quantitative space area with a passage area, and forms an output valve with a part of the base part and a part of the operation part,
When the operation unit in the stationary mode is operated and the output valve is closed, the stem moves to the open state of the inflow valve, so that the content in the quantitative space region from the inflow valve to the output valve And when the operation is canceled and the stem returns to the stationary mode, the inflow valve is closed and the output valve is opened so that the contents of the quantitative space region are injected into the external space. In the quantitative injection mechanism to be
The elastic member between the base and the operation unit for urging the output valve to the open state is omitted, and when the stem returns from the content inflow mode to the stationary mode, the output valve Transition from the previous closed state to the open state based only on the pressure of the contents in the quantitative space region,
A quantitative injection mechanism for an aerosol container. The fixed-quantity injection mechanism according to claim 1 was provided, and the injection gas and contents were accommodated.
Aerosol type product characterized by that.

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