JP7144079B2 - Fixed-quantity injection mechanism for aerosol container and aerosol-type product equipped with this fixed-quantity injection mechanism - Google Patents

Description

The present invention relates to a metered injection mechanism for use in aerosol products.

In particular, a downstream metering chamber inside the main housing containing a stem that provides a valving action in direct conjunction with the injection operation, and a valve that communicates longitudinally with the downstream metering chamber from an open state to a closed state upon injection operation. It relates to a metering injection mechanism consisting of an upstream metering chamber of a longitudinal expansion tank structure with a transitioning inlet valve.

The upstream metering chamber of this expansion tank structure compensates for the lack of capacity of the downstream metering chamber normally set inside the main housing, and enables a large amount of metered injection.

Conventionally, in a metered injection mechanism that uses liquefied gas as a propellant by mixing it with the contents, the metered chamber in which the inlet valve on the upstream side and the discharge valve on the downstream side are spaced apart and the cross section of the flow path is narrowed, discharge When the valves were opened, the contents therebetween, especially the contents near the inflow valve located at the bottom, did not sufficiently flow out.

The vaporized propellant stored in the metering chamber together with the content is vaporized and accumulated near the upper release valve, and is released into the external space region while pressing the lower content at the start of injection, and after the start of injection Since the vaporized propellant also expands while moving toward the release valve and presses down the contents under it, the effect of actively pushing the contents upward is small.

Therefore, in order to secure the function of pushing out the contents, the expansion tank has been set to have a widthwise and wide shape that is long in the radial direction by suppressing the length in the vertical direction as the flow direction of the contents (see Patent Document 1).

Also, when a U-shaped route through which the vaporized propellant pushes out the content is adopted for the additional tank, a laterally wide tank is used (see Patent Document 2).

In the case of using such a horizontally wide tank, there is still room for improvement in that the stirring action accompanying the movement of the stem during the injection operation is less likely to reach the contents near the inner peripheral surface of the housing farther from the stem.

In the case of a plastic aerosol container such as PET, or a glass aerosol container with a narrow opening due to the need to ensure strength, this container opening should not be Since the fuel cannot pass through the tank, the constant injection mechanism is used without an additional tank, and there is room for improvement in terms of expanding the injection capacity (see Patent Document 3).

JP 2008-265794 JP 2008-308197 JP 2014-088187

In the conventional metering chamber, in order to fully release the stored contents, the distance to the release valve is set short, and the propellant that evaporates and accumulates upward pushes the contents at the bottom of the metering chamber toward the release valve. It was configured like this.

For this reason, when the purpose is to increase the injection capacity, in the metering chamber that is elongated in the vertical direction, the propellant that evaporates and accumulates upward has little effect of pushing out the contents in the lower part of the metering chamber toward the release valve. It has been considered difficult to fully release and ensure quantification.

However, as a result of many studies, experiments, and verifications based on new ideas, the applicant of the present application has found that even a quantitative chamber that is elongated in the direction of the flow path, which has been considered inappropriate until now, can be used as a quantitative chamber. It was confirmed that if there is a movable member (stem) that promotes agitation of the contents and the propellant inside, the contents can be sufficiently discharged.

In the present invention, in response to the need to realize a metered injection mechanism that can be applied to an aerosol container with a narrow opening, a longitudinally elongated metering chamber is adopted, and a movable member that promotes agitation of the contents and the propellant inside the metering chamber. The purpose is to improve the injection state by setting a stem that becomes

Another object of the present invention is to facilitate assembly by providing an extension portion of the stem that is extended as the metering chamber is enlarged in the form of an extension stem that interlocks with the main stem by abutment.

The present invention solves the above problems as follows.
(1) The inflow valve (for example, the lower end portion 8d, the annular seal member 10) of the enlarged metering chamber (for example, the downstream metering chamber A, the upstream metering chambers B and C, which will be described later) extending in the longitudinal direction of the aerosol container and a constant injection mechanism in which the contents therein are injected into an external space region by the action of an outflow valve (for example, a horizontal hole portion 5a and a stem gasket 6, which will be described later),
The enlarged quantitative chamber is
a main housing in which the outflow valve is set (for example, a main housing 4 described later);
It has straight inner peripheral surfaces (for example, straight inner peripheral surfaces 7c and 13c to be described later) in the vertical direction, has a straight cylindrical shape as a whole, is fitted into the main housing, and is an enlarged metering chamber in which the inflow valve is set. and an additional housing (for example, additional housings 7 and 13 described later),
The main housing and the additional housing are
Each lower end portion has a common attachment portion (for example, partition portions 4a, 7b, 13b, and hanging cylindrical portions 4b, 7e, 13e, which will be described later) for the inflow valve,
The outflow valve is
A main stem (for example, a a main stem 5), which will be described later;
An elastically deformable downstream annular valve member (for example, a later-described stem gasket 6),
The inflow valve is
an extension stem (for example, an extension stem 8 to be described later) disposed in the additional housing in an integrated state in contact with the main stem;
An elastically deformable upstream that is attached to the attachment portion of the additional housing (for example, partition portions 7b and 13b and hanging cylindrical portions 7e and 13e, which will be described later) and exhibits opening and closing action between the extension stem and the lower end side outer surface of the extension stem. It consists of a side annular valve member (for example, an annular seal member 10 described later),
The additional housing is
Inside thereof, an elastic member is provided for urging the extension stem upward to abut against the main stem, and for indirectly urging the main stem upward from the extension stem by this abutting action. A member (for example, a spring 9 described later) is provided,
A configuration mode is used.
(2) In (1) above,
abutting portions of the main stem and the extension stem,
A convex portion (for example, a lower end portion 5c described later) is formed on one of them,
On the other side, a concave portion (for example, a top surface concave portion 8a described later) that receives and holds the convex portion is formed.
A configuration mode is used.

The subject of the present invention is a metered injection mechanism for an aerosol container having such a configuration and an aerosol type product using the same.

The present invention, by taking the above configuration,
Aiming to improve the injection state of the fixed injection mechanism that can be applied to aerosol containers with narrow openings,
To facilitate the assembly of the fixed quantity injection mechanism,
for the purpose.

FIG. 3 is an explanatory view showing a stationary mode (inflow valve: open, release valve: closed) of a fixed quantity injection mechanism with specifications for a discharge amount of 1 mL per operation according to the present invention. FIG. 2 is an explanatory view showing an operation mode (inflow valve: closed, release valve: open) of the fixed quantity injection mechanism of FIG. 1; FIG. 2 is an explanatory view showing the assembly of the fixed quantity injection mechanism of FIG. 1; FIG. 3 is an explanatory diagram showing a static mode (inflow valve: open, discharge valve: closed) of a fixed quantity injection mechanism with specifications for a discharge amount of 0.5 mL per operation according to the present invention.

A mode for carrying out the present invention will be described with reference to FIGS. 1 to 4. FIG.

Elements with alphanumeric reference numbers below (eg partition 4a) are in principle indicated to be part of the elements with numerical portions of the reference numbers (eg main housing 4).

The following symbols are used in FIGS.
The additional housing 7 is used only in FIGS. 1 to 3, and the additional housing 13 is used only in FIG.

here,
1 is a container body containing the contents to be sprayed and the liquefied gas as a propellant;
2 is a mounting cup attached to the upper opening of the container body 1;
A mounting gasket 3 is disposed between the upper opening of the container body 1 and the lower surface of the mounting cup 2 to prevent leakage of contents and propellant.
A tubular main housing 4 is engaged with the central portion of the mounting cup 2 and accommodates a main stem 5, which will be described later.
4a has a communication hole in the center thereof through which the lower end 5c of the main stem 5, which will be described later, passes and which serves as a flow path for the contents and the propellant. a partition that holds the upper surface of the member 10,
4b is a hanging tubular part below the partition part 4a,
4c is a total of six vertical rib-like portions protruding from the inner peripheral surface of the main housing 4 above the partition portion 4a;
4d is provided on the vertical rib-shaped portion 4c, and is an upward stepped portion for holding the lower end portion of the spring 9, which will be described later, when the extension stem 8, which will be described later, is not used;
Reference numeral 5 designates a main stem, which is an object for injection operation, and is provided inside the main housing 4 in such a manner as to protrude from the central hole of the mounting cup 2;
5a is formed in the main stem 5 and constitutes a discharge valve (downstream valve) together with a stem gasket 6 which will be described later;
5b is a content passage portion formed downstream from the horizontal hole portion 5a;
A lower end portion 5c abuts on a recessed top surface 8a of an extension stem 8, which will be described later.
5d is a downward stepped portion for holding the upper end of a spring 9, which will be described later, when an extension stem 8, which will be described later, is not used;
6 is disposed between the central ceiling surface of the mounting cup 2 and the main housing 4, and its central hole portion is slidably brought into close contact with the outer peripheral surface of the main stem 5, and the outer opening side of the lateral hole portion 5a a well-known stem gasket that constitutes a release valve (downstream valve),
are shown respectively.

again,
7 is an additional housing for 1 mL constant injection, which is entirely formed in a straight cylinder shape and is fitted to the outer peripheral surface of the hanging cylinder part 4b;
An annular stepped portion 7a is provided on the inner peripheral surface of the additional housing 7 and contacts the lower end surface of the hanging tubular portion 4b to determine the fitting position with the main housing 4.
7b has a communication hole in the center thereof through which the lower end 8d of the extension stem 8, which will be described later, passes and which serves as a flow path for contents and propellant. A partition portion that holds the upper surface of the annular seal member 10 of
7c is a straight inner peripheral surface between the annular stepped portion 7a and the partition portion 7b;
7d protrudes from the partition 7b and the straight inner peripheral surface 7c, and has a total of three vertical rib-shaped portions for guiding the extension stem 8 and the spring 9, which will be described later;
7e is a hanging tubular portion provided in a manner hanging from the partition portion 7b;
An extension stem 8 is provided inside the additional housing 7 or an additional housing 13, which will be described later, and interlocks with the movement of the main stem 5 by the ejection operation.
8a is a concave portion on the top surface to which the lower end portion 5c of the main stem 5 abuts and is held;
A large-diameter portion 8b is guided by the inner surface of the hanging tubular portion 4b and aligns the lower end portion 5c with the top surface recessed portion 8a during assembly.
A slit portion 8c is provided on the outer peripheral surface of the large diameter portion 8b and secures a flow path for the contents.
8d is a lower end portion forming an inflow valve (upstream valve) together with an annular seal member 10, which will be described later;
8e is a downward stepped portion for holding the upper end of the spring 9, which will be described later;
are shown respectively.

again,
A spring 9 biases the extension stem 8 and the main stem 5 abutting thereon upward.
Reference numeral 10 denotes an annular seal member having an annular skirt portion which hangs downward at its central hole, and forms an inflow valve (upstream valve) together with the lower end portion of the extension stem 8;
Reference numeral 11 denotes a tubular bushing which is fitted to the hanging tubular portion 7e, a hanging tubular portion 13e to be described later, and the like, and holds the lower surface of the flange portion of the annular seal member 10;
A dip tube 12 is attached to the lower end of the bush 11 and introduces the contents of the container body 1 into the inflow valve.
A is a downstream metering chamber of about 0.2 mL defined inside the main housing 4;
B is an approximately 0.8 mL upstream metering chamber defined inside the additional housing 7 and communicating with the downstream metering chamber A through the central hole of the partition 4a;
are shown respectively.

Further, in FIG. 4, 13 is an additional housing for 0.5 mL constant injection, which is entirely formed in a straight cylindrical shape and is fitted to the outer peripheral surface of the hanging cylindrical portion 4b.
An annular stepped portion 13a is provided on the inner peripheral surface of the additional housing 13 and contacts the lower end surface of the hanging tubular portion 4b to determine the fitting position with the main housing 4.
13b has a communication hole at its center for the lower end 8d of the extension stem 8, which will be described later, through which the contents and the propellant flow. A partition portion that holds the upper surface of the annular seal member 10 of
13c is a straight inner peripheral surface continuing upstream from the annular stepped portion 13a;
13d is a small inner diameter portion provided between the partition portion 13b and the straight inner peripheral surface 13c for guiding the extension stem 8 and the spring 9;
13e is a hanging tubular portion provided in a manner hanging from the partition portion 13b;
C is an approximately 0.3 mL upstream metering chamber defined inside the additional housing 13 and communicating with the downstream metering chamber A through the central hole of the partition 4a;
are shown respectively.

The main housing 4, main stem 5, additional housing 7, extension stem 8, bushing 11, dip tube 12 and additional housing 13 are made of plastic such as polypropylene, polyethylene, polyacetal, nylon, polybutylene terephthalate. be.

Also, the spring 9 is made of plastic or metal, for example. The mounting cup 2 is made of metal, for example. The mounting gasket 3, stem gasket 6 and annular sealing member 10 are made of plastic such as polypropylene or polyethylene, rubber or elastomer.

The container body 1 is made of plastic such as polyethylene terephthalate or polyethylene naphthalate, or glass.

The container main body 1 contains a liquid content and a propellant, and the vaporized propellant is accumulated in the upper part. It is desirable that the liquid contents and the propellant are naturally mixed, but if they are not naturally mixed, the user may mix them by shaking the container body 1 immediately before use.

FIG. 1 shows a static mode of a fixed quantity injection mechanism with specifications for a discharge amount of 1 mL per operation.

The volumes of the downstream side quantitative chamber A and the upstream side quantitative chamber B are about 0.2 mL and about 0.8 mL, respectively, and they are constantly communicated through the central hole of the partition part 4a to form a total volume of about 1 mL. is doing.

Since the additional housing 7 is entirely cylindrical and thin, it can be attached to the narrow opening of the container body 1 without any problem.

In the state shown in FIG. 1, the main stem 5 and the extension stem 8 are biased by the spring 9 and set to the upper position, the horizontal hole 5a of the main stem 5 is positioned above the stem gasket 6, and the release valve is closed. , the lower end 8d of the extension stem 8 is separated from the annular seal member 10, the inflow valve is opened, and the contents that flowed into the downstream side metering chamber A and the upstream side metering chamber B along the paths indicated by the arrows in the previous operation. and propellant filled.

Since the main stem 5 is always elastically urged upward through the extension stem 8 that abuts thereon, the lower end 5c of the main stem 5 and the recess 8a on the top surface of the extension stem 8 are never separated from each other. The main stem 5 and the extension stem 8 always move together.

Since it is not necessary to engage the main stem 5 and the extension stem 8, the assembly process for that purpose is unnecessary. When the additional housing 7 having the extension stem 8 and the spring 9 disposed therein is fitted to the main housing 4 having the main stem 5 assembled therein, the large diameter portion 8b of the extension stem 8 is guided inside the hanging tubular portion 4b. , the top surface concave portion 8a naturally contacts the lower end portion 5c of the main stem 5. As shown in FIG.

In general, the upper end of the main stem 5 is used by attaching an actuator (not shown) suitable for various uses, which is an object to be directly operated by the user.

When the main stem 5 is moved downward from the state shown in FIG. 1 by the user's push-down operation, the lower end 8d of the extension stem 8, which is interlocked with this movement, comes into contact with the inner peripheral surface of the annular seal member 10, closing the inflow valve. In this state, the downstream metering chamber A and the upstream metering chamber B are set as closed spaces.

Further, by pushing down the main stem 5 , the contents and propellant stored in the downstream metering chamber A and the upstream metering chamber B are stirred by the side surfaces of the main stem 5 and the extension stem 8 .

FIG. 2 shows the mode of operation in which the contents are released, with the main stem 5 pushed further down.

In this state, the horizontal hole portion 5a of the main stem 5 is positioned below the stem gasket 6, the release valve is opened, and the downstream metering chamber A and the upstream metering chamber B are connected to the outside through the horizontal hole portion 5a. Communicating with the spatial region, the agitated propellant is vaporized and stably discharged from the content passage portion 5b together with the content along the route indicated by the arrow in the figure.

In this way, the extension stem 8 is provided in the upstream metering chamber B defined by the straight inner circumferential surface 7c in the vertical direction, and the contents and the propellant contained in the upstream metering chamber B are moved by the side surface of the extension stem 8. Since the contents are agitated, the contents can be discharged stably even if an additional housing 7 having a straight cylindrical shape as a whole is employed.

When the content and the propellant have been discharged, the pressure inside the downstream side metering chamber A and the upstream side metering chamber B drops to almost atmospheric pressure.

When the main stem 5 is released after the discharge is completed, the extension stem 8 and the main stem 5 abutting therewith are moved upward by the biasing force of the spring 9 , and the lateral hole 5 a of the main stem 5 is closed by the stem gasket 6 . It closes and the release valve is closed.

When the main stem 5 and the extension stem 8 are moved thereafter, the lower end portion 8d is separated from the annular seal member 10 and the inflow valve is opened. , the contents and the propellant from the container body 1 flow due to the vaporization pressure of the propellant contained in the container body 1 . The content and the propellant that have flowed in will be the target of the next release.

The main stem 5 and the extension stem 8 move until the intermediate step of the main stem 5 abuts the stem gasket 6, returning to the stationary mode of FIG.

FIG. 3 shows the assembly of the constant injection mechanism of FIG.

First, the mounting cup 2, mounting gasket 3, main housing 4, main stem 5 and stem gasket 6 are assembled as a common upper unit.

Next, an additional housing 7 and an extension stem 8 are prepared according to the volume of the metering chamber required, and assembled together with the spring 9, the annular seal member 10 and the bush 11 into the upper unit.

A dip tube 12 matching the distance to the bottom of the container body 1 is attached to the bush 11 .

The additional housing 7 and the extension stem 8 are omitted, the spring 9 is arranged between the upward stepped portion 4d of the main housing 4 and the downward stepped portion 5d of the main stem 5, and the annular seal member 10 and bushing 11 are replaced with the main housing. By attaching it to the inner peripheral surface of the hanging tubular portion 4b of 4, it is possible to make it a 0.2 mL specification fixed quantity injection mechanism.

In this way, since the parts are shared with the small-capacity constant injection mechanism that does not use the additional housing 7, it is possible to reduce the management cost.

Moreover, since the upper unit is the same as the above-described upper unit except for the mounting of the spring 9, the annular seal member 10 and the bush 11, the assembly line can be shared and the manufacturing cost can be reduced.

FIG. 4 shows the stationary mode of the fixed quantity injection mechanism with specifications for a discharge amount of 0.5 mL per operation.

1 in that, instead of the additional housing 7, an additional housing 13 having the same length and a different metering chamber capacity is used.

The volumes of the downstream side quantitative chamber A and the upstream side quantitative chamber C are about 0.2 mL and about 0.3 mL, respectively. constitutes

The additional housing 13 has a portion of the straight inner peripheral surface 13c corresponding to the straight inner peripheral surface 7c that is shorter than that of the additional housing 7. Below the straight inner peripheral surface 13c, when the extension stem 8 is passed through, the contents can be stored. It is set to a small inner diameter that can secure a flow path of

In this way, the additional housing 13 has the same overall length as the additional housing 7 , with the upstream metering chamber C therein being smaller than the upstream metering chamber B of the additional housing 7 .

As a result, the extension stem 8 can be made common, and the manufacturing cost and management cost can be reduced. In addition, since the additional housing 7 and the additional housing 13 have the same length, they can be assembled on the same production line as the fixed quantity injection mechanism of FIG.

Of course, the fixed quantity injection mechanism for the aerosol container of the present invention is not limited to the illustrated embodiments, and for example,
By changing the length of the straight inner peripheral surface 13c of the additional housing 13, a constant injection mechanism with a discharge amount other than 0.5 mL per operation is used.
By changing the mounting cup 2, mounting gasket 3, etc., it is applied to a metal can with a large container opening or a thin metal can as a whole including the container opening.
A vertical slit or the like is provided in the shaft of the extension stem 8 to change the volume of the metering chamber,
and so on.

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 added to the contents include, for example, powders, oil components, alcohols, surfactants, polymer compounds, active ingredients suitable for each application, and water.

Metal salt powder, inorganic powder, resin powder and the like are used as the powdery material. For example, talc, kaolin, aluminum hydroxychloride (aluminum salt), calcium alginate, gold powder, silver powder, mica, carbonate, magnesium chloride, silica, zinc oxide, titanium oxide, zeolite, nylon powder, barium sulfate, cellulose, mixtures thereof and so on.

Oil components include silicone oils such as dimethylpolysiloxane, ester oils such as isopropyl myristate, oils such as palm oil, eucalyptus oil, camellia oil, olive oil, and jojoba oil, hydrocarbon oils such as liquid paraffin, myristic acid, and palmitic acid. Fatty acids such as acid, stearic acid, linoleic acid and linolenic acid are used.

As alcohols, monohydric lower alcohols such as ethanol, monohydric higher alcohols such as lauryl alcohol and cetanol, and polyhydric alcohols such as ethylene glycol, 1,3-butylene glycol and glycerin are used.

Examples of surfactants include anionic surfactants such as sodium lauryl sulfate, nonionic surfactants such as polyoxyethylene alkyl ethers and polyglycerin fatty acid esters, amphoteric surfactants such as betaine lauryldimethylaminoacetate, and alkyl chlorides. A cationic surfactant such as trimethylammonium is used.

As the polymer compound, hydroxyethyl cellulose, methyl cellulose, gelatin, starch, casein, xanthan gum, carboxyvinyl polymer, etc. are used.

Active ingredients for each application include dyes such as paraphenylenediamine and aminophenol, oxidizing agents such as hydrogen peroxide, setting agents such as acrylic resins and waxes, and ultraviolet rays such as 2-ethylhexyl paramethoxycinnamate. Absorbents, vitamins such as retinol and dl-α-tocopherol, moisturizers such as hyaluronic acid, anti-inflammatory analgesics such as methyl salicylate and indomethacin, disinfectants such as sodium benzoate and cresol, pests such as pyrethroids and diethyltoluamide Repellents, antiperspirants such as zinc paraphenolsulfonate, cooling agents such as camphor and menthol, anti-asthmatic agents such as ephedrine and adrenaline, sweeteners such as sucralose and aspartame, adhesives and paints such as epoxy resins and urethane, Dyes such as paraphenylenediamine and aminophenol, oxidizing agents such as hydrogen peroxide, and extinguishing agents such as ammonium dihydrogen phosphate and sodium/potassium hydrogen carbonate are used.

Furthermore, suspending agents, emulsifiers, antioxidants, sequestering agents and the like can be used in addition to the above contents.

Liquid gas such as liquefied petroleum gas, dimethyl ether, and hydrofluoroolefin is used as the injection gas for aerosol products.

1: Container body 2: Mounting cup 3: Mounting gasket 4: Main housing 4a: Partition part 4b: Hanging tubular part 4c: Vertical rib-shaped part 4d: Upward stepped part 5: Main stem 5a: Horizontal hole (release valve)
5b: content passage portion 5c: lower end portion 5d: downward stepped portion 6: stem gasket (release valve)

7: Additional housing 7a: Annular stepped portion 7b: Partition portion 7c: Straight inner peripheral surface 7d: Vertical rib-shaped portion 7e: Drooping cylindrical portion 8: Extension stem 8a: Top surface concave portion 8b: Large diameter portion 8c: Slit portion 8d : Lower end (inflow valve)
8e: Downward step

9: Spring 10: Annular sealing member (inflow valve)
11: Bush 12: Dip tube A: Downstream metering chamber B: Upstream metering chamber

(Fig. 4)
13: Additional housing 13a: Annular stepped portion 13b: Partition portion 13c: Straight inner peripheral surface 13d: Small inner diameter portion 13e: Hanging cylindrical portion C: Upstream side metering chamber

Claims (3)

In a metered injection mechanism in which the contents in the aerosol container are sprayed into an external space region by the action of an inflow valve and an outflow valve in an expanded metered chamber extending in the longitudinal direction of the aerosol container,
The enlarged quantitative chamber is
a main housing in which the outflow valve is set;
an additional housing for enlarging the metering chamber, which has a straight inner peripheral surface extending in the vertical direction and has a straight cylindrical shape as a whole, is fitted to the main housing, and is set with the inflow valve;
The main housing and the additional housing are
Each lower end portion has a common mounting portion for the inflow valve,
The outflow valve is
a main stem disposed in the main housing and having a content passage hole and a downstream content passage portion following the content passage;
an elastically deformable downstream annular valve member attached to the upper end portion of the main housing so as to abut on the outer peripheral surface of the main stem and exhibiting opening and closing action between the hole and the main housing;
The inflow valve is
an extension stem disposed in the additional housing in an integrated state in contact with the main stem;
an elastically deformable upstream annular valve member attached to the attachment portion of the additional housing and exhibiting opening and closing action with the lower end side outer surface of the extension stem;
The additional housing is
Inside thereof, an elastic member is provided for urging the extension stem upward to abut against the main stem, and for indirectly urging the main stem upward from the extension stem by this abutting action. provided with members,
A constant injection mechanism characterized by: abutting portions of the main stem and the extension stem,
Forming a convex portion on one side,
On the other side, a concave portion is formed to receive and hold the convex portion,
2. A constant injection mechanism according to claim 1, characterized in that: Equipped with the fixed quantity injection mechanism of the aerosol container according to claim 1 or 2, and containing an injection gas and contents,
An aerosol product characterized by:

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