JP2008265794A - Degassing mechanism of aerosol-container, and aerosol type product equipped with this degassing mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a degassing mechanism which can be applied to both a usual type and a constant volume ejecting type aerosol products. <P>SOLUTION: Relative to an aerosol-container wherein a stem 2 and a stem gasket 10 are provided that constitute an outflow valve toward external space, and the stem, based on an actuating mode setting operation, is allowed to move within the opening section of a mounting cap 9, thereby the outflow valve is caused to be opened, the upper side portion of the stem that includes a range that is in correspondence to the opening section at least in a rest-mode position is constituted of an inner-tube 2a in which an ejection passage is formed and an outer-tube 2b that is installed thereon in a detachable manner. When degassing, the inner-tube 2a, with the outer-tube 2b being detached, is pressed transversely as it is in the rest-mode position, thus is displaced within the range of the opening section, thereby forming an outflow passage for degassing in the interval with the stem gasket. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a degassing mechanism used for aerosol products.
In particular, the upper part of the stem corresponding to the opening of the mounting cap at the stationary mode position is composed of a main body part on which the injection passage is formed and an outer part thereof, and the mounting cap and the relevant part are removed by removing the outer part. In other words, play in the lateral direction is positively formed between the main body portion.

  When the gas is vented, the stem main body portion is laid down in the operation mode position within this play range, whereby a gas outflow path is set between the main body portion and the stem gasket.

  Note that, in the aerosol injection type product, only the injection target and the liquefied gas in the fixed amount chamber are injected into the external space by the action of the liquefied gas as the propellant.

  Further, a part of the liquefied gas for injection is vaporized and remains inside the container even after the user has used up the injection target.

  Aerosol-type products of the above-mentioned fixed-quantity injection type, that is, the communication state between the inside of the container and the fixed-quantity chamber (and the downstream outlet, external space, etc.) is cut off when the stem is moved to the operation mode position. In view of the applicability to the degassing operation before disposal in the container, it is desirable that the residual gas inside the container can be released to the external space without moving the stem to the operation mode position. It responds to.

  The applicant of the present application has already proposed a degassing mechanism in an aerosol type product of a fixed injection type (see Patent Document 1).

  In this degassing mechanism, the stem is moved to a position (degassing mode position) further below the operation mode (= quantitative injection mode), and in that state, the inflow valve (input valve) of the metering chamber is set to the open state. Thus, the groove-shaped part is intermittently formed in the circumferential direction of the stem outer peripheral surface. The metering chamber inflow valve is composed of an annular elastic valve member and a stem outer peripheral surface that is in close contact with the metering chamber in the metering injection mode.

  And when setting gas venting mode, the user should just push down an operation button (stem) further from an operation mode position.

  As a result of this pressing operation, the groove-shaped portion on the outer peripheral surface of the stem faces the elastic valve member, and the residual vaporized gas inside the container flows into the quantitative chamber through the groove-shaped portion. Residual vaporized gas that has flowed into the metering chamber is jetted into the external space through the longitudinal passage inside the stem in the same manner as in the operation mode (= metering jet mode).

That is, in the proposed gas venting mechanism, the operation mode (quantitative injection mode) in which the elastic valve member is in close contact with the entire circumferential direction of the outer peripheral surface of the stem due to the difference in the operation stroke of the stem (operation button), It is possible to select a degassing mode in which a gap with the elastic valve member is secured in the groove-like portion formed intermittently in the direction.
Japanese Patent Application Laid-Open No. 2005-306459

  The present invention completely changes the concept of the stem operation mode from the above-described proposed degassing mechanism, and provides a new degassing that can operate reliably for both the aerosol-type products of the metering injection type and the normal type. The purpose is to provide a mechanism.

  That is, instead of making the operation stroke length of the stem different between the operation mode and the gas venting mode as described above (gas venting mode> actuation mode), the stem is formed by a plurality of members such as inner and outer cylindrical parts, and the gas venting is performed. When the mode is set, the stem operation mode is adopted in which the outer cylindrical portion is removed and the stem main body portion (inner cylindrical portion) is tilted in the horizontal direction while being in the stationary mode position.

  By removing this outer cylindrical part, the clearance (interval) between the stem main body part (inner cylindrical part) and the edge part of the mounting cap opening increases, and this stem main body part (inner cylindrical part) In other words, a gas outflow path is formed between the stem body portion and the stem gasket (= outside of the stem) by sideways.

The present invention solves the above problems by the following degassing mechanism.
(1) A stem (for example, a stem 2 described later) and a stem gasket (for example, a stem gasket 10 described later) constituting an outflow valve to the external space are provided, and the stem is mounted on a mounting cap (for example, a later described cap) based on an operation mode setting operation. In an aerosol container that moves through the opening of the mounting cap 9) and thereby opens the outflow valve,
An upper portion of the stem including a range corresponding to the opening at least in the stationary mode position is removable from a main body portion (for example, an inner cylindrical portion 2a described later) formed with an injection passage. It is configured with an outer portion (for example, an outer cylindrical portion 2b described later) provided in a mode,
The main body portion is pushed laterally in a stationary mode position with the outer portion removed, and is displaced within the range of the opening, thereby degassing outflow passages between the stem gasket and the main body portion. Form.
(2) In (1) above,
As the outer portion, a cylindrical portion (for example, an outer cylindrical portion 2b described later) attached around the main body portion is used.
(3) In the above (1) and (2),
As the outflow valve, an output valve of a quantitative chamber for quantitative injection of the injection target is used.

  Note that the outer portion of the stem that is removed when the gas venting mode is set is not limited to the outer cylindrical portion as shown in the figure, and the clearance with the mounting cap described above is ensured in the removed state. I just need it.

  For example, you may use the piece-shaped thing attached to the part of the outer peripheral surface of a stem main-body part, or the part of several places.

  The present invention is directed to a degassing mechanism having such a configuration and an aerosol type product including the degassing mechanism.

  In the present invention, the stem is formed by a plurality of members such as inner and outer cylindrical portions, and when setting the gas venting mode, the outer cylindrical portion is removed and the stem body portion (inner cylindrical portion) is stationary. Since the gas outflow path is formed between the stem body and the stem gasket (= outside of the stem) by tilting in the horizontal direction while maintaining the mode position, both the fixed injection type and normal type aerosols are used. Degassing can be performed reliably even for a formula product.

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

  As described above, the present invention is of course applicable to a degassing mechanism in a normal aerosol type product, which is not a quantitative injection type. Targeting the "gas venting mechanism in aerosol type aerosol products".

here,
FIG. 1 shows a degassing mode of the aerosol injection type product of the present invention (a state in which the stem 2 from which the operation button 1 and the outer cylindrical portion 2b are removed is tilted laterally to increase the clearance with the mounting cap 9). Indicate
FIG. 2 shows the stationary mode of the aerosol type product of FIG. 1 (= the input valve [inflow valve] of the metering chamber is open and the output valve [outflow valve] is closed without the injection button 5 being pushed), and A fixed injection mode (= the injection button 5 is pressed, the input valve of the fixed chamber is closed, and the output valve is open);
FIG. 3 shows a degassing preparation mode in a state where the operation button and the outer cylindrical portion of the aerosol type product of FIG. 1 are removed.

  The following components with reference numbers with alphabets (for example, the passage portion 1a) indicate that they are part of the components (for example, the operation buttons 1) with the reference numbers in principle.

1-3,
1 is a type of operation button that moves up and down based on the pressing operation of the user,
1a is the passage part of the injection target or propellant,
1b is an injection hole following the passage portion,
2 is a component of the output valve (outflow valve) of the metering chamber, which is a stem that engages with the operation button 1 and interlocks vertically.
2a is an inner cylindrical portion on the upper side of a hole 2d described later,
2b is an outer cylindrical portion that is detachably engaged with the outer peripheral surface portion of the inner cylindrical portion and is fitted to the operation button 1.
2c is the internal passage area of the injection target or propellant,
2d is a hole that communicates the internal passage area and an internal space area for forming a fixed-quantity chamber of the housing 3 described later,
2e is an annular step portion (ceiling surface portion) that is formed on the outer peripheral surface below the hole portion and receives a coil spring 5 described later.
3 is a stick-like stem extension member engaged (fitted) with the lower end surface portion of the stem 2;
3a is a component of the input valve (inflow valve) of the metering chamber and has a sealing action surface (lower outer peripheral surface) having a blocking function for a sealed portion 7b described later,
4 is a cylindrical housing that accommodates the stem 2 in a vertically movable manner,
4a is a large-diameter upper cylindrical portion,
4b is a lower cylindrical portion having a small diameter,
4c is an annular step on the inner peripheral surface side which can be said to be a boundary between the upper cylindrical portion and the lower cylindrical portion;
4d is a convex portion for engagement formed continuously or intermittently in the circumferential direction of the outer peripheral surface of the lower cylindrical portion,
5 is a coil spring disposed between the annular step 2e of the stem 2 and the annular step 3c of the housing 3 to urge the stem upward.
6 is an upper cover body that is fitted with the housing 4 and constitutes an additional unit for forming the metering chamber;
6a is a central cylindrical part,
6b is a concave portion for engagement (corresponding to the convex portion 4d of the housing 4) formed continuously or intermittently in the circumferential direction of the upper inner peripheral surface of the central cylindrical portion.
6c is an annular hanging part formed outside the central cylindrical part,
6d is a convex portion for engagement formed continuously or intermittently in the circumferential direction of the lower outer peripheral surface of the annular hanging portion,
7 is a lower cover body that is fitted to the upper cover body 6 and constitutes an additional unit for forming the metering chamber,
7a is a central cylindrical part,
7b is a component of the input valve (inflow valve) of the metering chamber, and is an annular sealed portion formed on the inner peripheral surface of the central cylindrical portion,
7c is a ring-sheath-shaped part formed outside the central cylindrical part,
7d is a concave part for engagement (corresponding to the convex part 6d of the upper cover body 6) formed continuously or intermittently in the circumferential direction of the outer peripheral surface of the ring-sheath part,
8 is an opening area on the inlet side of the metering chamber defined by the sealing portion 7b of the lower cover body 7,
9 is a mounting cap attached to the open end side of a known aerosol container body (not shown);
Reference numeral 10 denotes a component of the output valve (outflow valve) of the metering chamber, which is attached between the upper opening portion of the housing 4 and the opening side ceiling surface of the mounting cap 9 to provide a sealing action for the internal space of the housing. Presenting stem gasket,
11 is inserted into a clearance (gap) between the inner cylindrical portion 2a and the mounting cap 9 after the outer cylindrical portion 2b of the stem 2 is removed, and the inner cylindrical shape is laid down and held in the gas venting mode. Rod-shaped and cylindrical jigs,
12 is a tube for injecting the injection target attached to the central cylindrical portion 7a of the lower cover body 7,
A is a schematic flow of residual gas in the degassing mode,
B is a schematic flow of an injection target from the container main body to the metering chamber (= the internal space from the opening region 8 to the stem gasket 10) in the initial stage of transition to the stationary mode,
C is a schematic flow of the injection object from the fixed quantity chamber to the external space in the fixed quantity injection mode,
Respectively.

  Here, the operation button 1, stem 2, stem extension member 3, housing 4, upper cover body 6, lower cover body 7, jig 11 and tube 12 are made of polypropylene, polyethylene, polyacetal, nylon, polybutylene terephthalate, or the like. It is made of plastic.

  The coil spring 5 is made of metal or plastic, the mounting cap 9 is made of metal, and the stem gasket 10 is made of plastic or rubber.

  A basic feature of the illustrated gas venting mechanism is that the upper portion of the stem 2 which is usually a single member (the upper portion including a range in which a clearance with the mounting cap 9 is generated) includes a passage portion such as an injection target. It is comprised from the inner cylindrical part 2a and the outer cylindrical part 2b attached to this in the removable form.

And with this configuration,
(11) In a state where the degassing mode is not set (stationary mode or fixed injection mode), the inner tubular portion 2a and the outer tubular portion 2b integrated with the inner tubular portion 2a take a normal stem form (see FIG. 2).
(12) When shifting to the degassing mode, first, the operation button 1 and the outer cylindrical portion 2b that is tightly fitted to the operation button 1 are pulled out from the inner cylindrical portion 2a upward in the drawing, so A stem configuration (see FIG. 3) in a degassing preparation mode in which the cylindrical portion 2b is discarded and the clearance with the mounting cap 9 is increased.
(13) Next, the jig 11 is inserted into the clearance portion so that the portion of the inner cylindrical portion 2a is laid down, and this state is maintained (see FIG. 1).

  Further, in this sideways state, the vertical position of the stem 2 (stem extension member 3) is the same as that in the stationary mode, and the sealing action of the stem extension member 3 that operates as the input valve (inflow valve) of the metering chamber. The surface 3a and the sealed portion 7b of the lower cover body 7 are separated from each other. That is, the opening area 8 on the metering chamber inlet side is opened without being closed.

  Therefore, the residual gas (the above-mentioned vaporized gas) inside the container body is “tube 12−opening region 8−the outer peripheral surface of the stem extension member 3 and the central cylindrical portion 6a (upper portion) as shown by an arrow A in FIG. By the flow of the annular region between the inner peripheral surface of the cover body 6), the internal space of the housing 4, and the gas outflow passage formed by the inner cylindrical portion 2a (stem 2) and the stem gasket 10 in a state of being laid down, Released into the external space. Here, when the cylindrical jig 11 is used, the residual gas also passes through this jig internal space.

  Of course, the residual gas in the metering chamber portion between the upper cover body 6 and the lower cover body 7 is “between the outer peripheral surface of the stem extension member 3 and the inner peripheral surface of the central cylindrical portion 6a (upper cover body 6). It is discharged into the external space by the flow of the “annular region—the internal space of the housing 4 —the gas outflow passage formed by the inner cylindrical portion 2 a (stem 2) and the stem gasket 10 in a sideways state”.

  As described above, liquefied gas (compressed gas) is used in aerosol type products having a metering valve mechanism.

  In the stationary mode of FIG. 2B, the stem 2 is in a sealed state in close contact with the stem gasket 10 by the action of the coil spring 5, and the opening region 8 on the metering chamber inlet side is in an open state.

  Therefore, the injection target of the container body is defined by the internal space area of the additional unit (= the upper cover body 6, the lower cover body 7, and the stem extension member 3) by the flow of the liquefied gas through the tube 12 in the approximately B direction. The flow rate) and the internal space of the housing 3 are flown into and stored therein.

  When the operation button 1 is pressed, the stem 2 and the stem extension member 3 move downward while resisting the elastic force of the coil spring 5 and shift to the quantitative injection mode (b).

  That is, as the stem extending member 3 (stem 2) is moved downward, the sealing action surface 3a is in close contact with the sealed portion 7b of the lower cover body 7 to close the opening area 8 on the metering chamber inlet side, and until then. The seal state between the stem 2 and the stem gasket 10 is released.

  As a result, the internal space area of the housing 3 communicates with the external space via the hole 2d of the stem 2, the internal passage area 2c, the passage portion 1a of the operation button 1, and the injection hole 1b.

  And the fixed_quantity | quantitative_assay room space area (internal space area) of the additional unit which is an upstream of the internal space area of the housing 3 is naturally connected with the container exterior space via the said housing internal space area.

  Due to this communication, a predetermined amount of the injection target that has entered the fixed-quantity chamber in the stationary mode is discharged into the external space from the injection hole 1b in a flow in the direction of B in general by the action of the liquefied gas mixed therewith.

  Here, since the lower end portion of the central cylindrical portion 6a of the upper cover body 6 is set so as to extend to the vicinity of the bottom surface of the metering chamber of the lower cover body 7, the central cylindrical portion and the outer annular hanging portion of the central cylindrical portion 6a. The contents accommodated in the upper part of the additional internal space area (= the main space area of the fixed-quantity chamber) between 5c inevitably descend once and the lower end part of the central cylindrical part 6a and the lower cover body 7 After passing through the gap with the upper surface (bottom surface of the metering chamber), the inner region of the central cylindrical portion rises.

  Therefore, generally, the content held in the bottom portion of the quantitative chamber, which is far from the hole 2d of the stem 2 and tends to remain without being discharged into the outer space of the container, It is surely injected in the form that is dragged by the flow.

  As the pressing operation of the operation button 1 ends, the stem 2 returns to the stationary mode position (b) by the elastic force of the coil spring 5.

  In addition, a normal type in which the additional unit (upper cover body 6 and lower cover body 7) and the stem extension member 3 are not provided, for example, a type in which the tube 12 is attached to the lower end opening side of the housing 4 Of course, in the case of the aerosol type product, the degassing mode of the embodiment of FIG. 1 can be set.

  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 (vitamins, etc.), pharmaceuticals, quasi-drugs, paints, horticultural agents, repellents (insecticides), cleaners, laundry pastes, urethane foams, fire extinguishers, adhesives, lubrication There are various uses such as agents.

  Examples of the injection target to be stored in the container body include water, powder, oil components, alcohols, surfactants, polymer compounds, and active ingredients according 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, suspension agents, ultraviolet absorbers, emulsifiers, moisturizers, antioxidants, sequestering agents, and the like other than the above injection target can 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. .

Explanatory drawing which shows the degassing mode (the state which increased the clearance with the mounting cap 9 by inclining the stem 2 which removed the operation button 1 and the outer cylindrical part 2b to the horizontal direction) of the aerosol injection type product of this invention. It is. The stationary mode of the aerosol type product of FIG. 1 (the injection button 5 is not pressed and the inflow valve of the metering chamber is open and the outflow valve is closed) and the metering mode (the injection button 5 is pressed and operated) It is explanatory drawing which shows the state where the inflow valve of the fixed_quantity | assay chamber closed and the outflow valve opened. It is explanatory drawing which shows the degassing preparation mode of the state which removed the operation button and outer side cylindrical part of the aerosol type product of FIG.

Explanation of symbols

1: Operation button 1a: Passage part 1b: Injection hole 2: Stem 2a: Inner cylindrical part 2b: Outer cylindrical part 2c: Internal passage area 2d: Hole part 2e: An annular step part (ceiling surface part)
3: Stem extension member 3a: Sealing action surface 4: Housing 4a: Large-diameter upper cylindrical portion 4b: Small-diameter lower cylindrical portion 4c: Annular step portion 4d: Engaging convex portion 5: Coil spring 6: Upper cover body 6a: central cylindrical portion 6b: concave portion (corresponding to convex portion 4d of housing 4)
6c: annular hanging portion 6d: engaging convex portion 7: lower cover body 7a: central tubular portion 7b: annular sealed portion 7c: annular sheath portion 7d: engaging concave portion (convex shape of the upper cover body 6) (Corresponding to part 6d)
8: Opening area on the inlet side of the metering chamber 9: Mounting cap 10: Stem gasket 11: Rod-shaped jig 12: Tube A: Schematic flow of residual gas in the degassing mode B: Injection in the initial stage of transition to the stationary mode Schematic flow of the object C: Schematic flow of the injection object in the quantitative injection mode

Claims (4)

In an aerosol container comprising a stem and a stem gasket that constitute an outflow valve to the external space, and the stem moves through the opening of the mounting cap based on the operation mode setting operation, whereby the outflow valve opens,
The upper portion of the stem including a range corresponding to at least the opening at the stationary mode position is composed of a main body portion in which an injection passage is formed and an outer portion provided in a removable manner. And
The main body part is pushed laterally in the stationary mode position with the outer part removed, and is displaced within the opening to form a gas outflow path with the stem gasket. ,
A degassing mechanism for an aerosol container. The outer part is a cylindrical part attached around the body part,
The degassing mechanism for an aerosol container according to claim 1. The outflow valve is an output valve of a quantitative chamber for quantitative injection of an injection object,
The degassing mechanism for an aerosol container according to claim 1 or 2. The gas venting mechanism according to any one of claims 1 to 3 is provided, and the gas for injection and the injection object are accommodated.
Aerosol type product characterized by that.

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