Dosing mechanism and aerosol product having the same

Abstract

In the metering injection mechanism of the present invention, a metering chamber is provided between the rod of the aerosol container using compressed gas and the external space area, and the reliable post-exposure is achieved to prevent leakage of the contents from the injection port after injection. A cylindrical part (9c) is provided at the intermediate valve (9b, 9c, 13a) between the upstream pressure chamber (A) and the downstream metering chamber (B) divided by the piston (11) in the tank (8), which fits into the outer periphery of the upward protrusion (13a), and does not immediately become open after the operation button (5) is released. In addition, the shaft (14) of the downstream valve (14a, 14b, 14c, 16) between the metering chamber (B) and the external space area is immediately closed by reducing the flow potential through the shaft spring (15) or shaft washer (16), and the closed state is reliably achieved by the step part (14c). Thus, by moving the contents from the pressurized chamber (A) to the metering chamber (B) for the next injection, the downstream valve is first closed to prevent leakage of the contents from the nozzle tip (6).

Description

Technical Field

[0001] This invention relates to a metering injection mechanism for aerosol products using compressed gas.

[0002] In particular, a metering injection mechanism is provided, which forms a metering chamber for injecting contents between a rod-side component of an aerosol container and an operating-side component that moves relative to it. The contents flowing in with the action of compressed gas inside the container drive a piston disposed in the metering chamber, thereby reducing its volume (metering chamber volume), and thus injecting the contents stored in the metering chamber into the external space area at the end of the previous metering injection stage.

[0003] That is, the metering injection mechanism is as follows: a metering chamber is formed between the lever output section and the operating section, and for aerosol products using compressed gas, the contents of the metering chamber are injected into the external space area when the operating section is pressed, for example, when the working mode is set.

[0004] Furthermore, taking such a metering injection mechanism as an example, the metering injection mechanism includes: a "post-draw" function (preventing post-draw function) that prevents leakage of contents into the external space area when no injection operation is performed, by closing the metering chamber area and the contents passage area on the injection port side during the stage when the piston moves to its final position (e.g., the uppermost position) and the original continuous injection of the contents ends.

[0005] In this instruction manual, for ease of explanation, the length direction of the rod, i.e. the up-down direction in each figure, is referred to as "up" or "down", and the direction in which the contents are sprayed into the external space area, i.e. the left direction in each figure, is referred to as "front". Background Technology

[0006] The applicant has proposed a metering injection mechanism of the type in which a metering chamber is formed between the lever output section and the operating section (see Patent Document 1). Among these, a metering injection mechanism with an anti-backflow function is also disclosed (see Figures 6 and 7 of Patent Document 1).

[0007] In addition, the English numerals in brackets [] used in the following description refer to the reference numerals in the drawings of Patent Document 1.

[0008] In the back-pull prevention function of the metering injection mechanism, the metering chamber [A'] is isolated from the external space area when no injection operation is performed by the valve component

[15] and the valve action of the orifice [13b] opened and closed by it.

[0009] In this valve operation, the piston

[14] moves upward using the pressure of the contents flowing from the container into the pressurized chamber [B'] through a jetting operation, thereby compressing the metering chamber [A'], and the valve component

[15] moves upward using the pressure of the contents contained therein and becomes "open" so that the contents can flow into the orifice [13b].

[0010] Furthermore, during the relative movement of the button [4] and the top plate-shaped component

[12] before the reset action from the injection operation and the transition to the stationary mode, the valve component

[15] descends relative to the orifice [13b], becoming an "open state" in which the contents cannot flow into the orifice [13b].

[0011] Existing technical documents

[0012] Patent documents

[0013] Patent Document 1: Japanese Patent Application Publication No. 2007-326647 Summary of the Invention

[0014] The problem the invention aims to solve

[0015] Furthermore, the valve used to prevent back-pull is closed before it is about to switch to the stationary mode after the reset action following the jet operation. As a result, the contents moving from the pressurized chamber [B'] to the metering chamber [A'] during the reset action sometimes still leak into the external space area through the open valve (orifice [13b]).

[0016] Furthermore, the restriction on the movement of contents from the pressurized chamber [B'] to the metering chamber [A'] is caused by the sealing effect resulting from the contact between the valve actuating part [13c] and the upper opening of the inner upper cylindrical part [11b]. Therefore, when the button-side base

[13] and the rod-side base

[11] move slightly relative to each other from the contacting state, the seal is released, and there is no room to move the valve component

[15] to seal the orifice [13b] before the seal is released.

[0017] The purpose of this invention is to make the downstream valve that blocks the passage to the injection port to prevent backflow reliable by closing it before the contents of the container move during the next injection operation when the valve is reset from the injection operation.

[0018] means for solving problems

[0019] The present invention addresses the above problems as follows.

[0020] (1) A metering injection mechanism, comprising the following:

[0021] A rod (e.g., rod 3, described later) for actuating an upstream valve on an aerosol container (e.g., aerosol container 1, described later) and a rod retainer (e.g., rod retainer 13, described later) integral with the aerosol container (e.g., aerosol container 1, described later) through which the contents of the sprayed object pass.

[0022] A can (e.g., can 8 described later) engages with the outer periphery of the rod holder in a liquid-tight, slidable state in the direction of rod release, and its interior communicates with the cylindrical end via an upstream passage of the rod holder;

[0023] An operating unit (such as operating button 5 described later) moves the can by the user's operation; and

[0024] A piston (e.g., piston 11 described later) is liquid-tightly slidably disposed in such a manner that it divides the interior of the can into an upstream pressurized chamber (e.g., upstream storage area A described later) and a downstream metering chamber (e.g., downstream receiving area B described later), and applies force to the pressurized chamber side.

[0025] The quantitative injection mechanism includes:

[0026] The intermediate valve (e.g., the annular stepped portion 9b, the cylindrical portion 9c, and the upwardly protruding portion 13a, described later) is closed by the can substantially abutting against the rod holder in the direction of rod release, thus cutting off the connection between the pressurization chamber and the metering chamber; and

[0027] Downstream valves (e.g., upper transverse hole 14a, lower transverse hole 14b, step portion 14c, shaft washer 16, described later) are provided on the metering chamber side of the tank. The metering chamber is connected to the external space area by transitioning from a closed state to an open state through the closed state of the intermediate valve, or at least by transitioning to a closed state through a decrease in flow potential.

[0028] (2) In (1) above, the following configuration is used:

[0029] When the operating unit is operated from stationary mode to spray mode

[0030] The can moves relative to the rod holder along the release direction of the rod and the intermediate valve becomes closed;

[0031] The connection between the pressurization chamber and the metering chamber is severed;

[0032] The downstream valve is turned on, allowing the metering chamber to connect with the external space area;

[0033] The can abuts against the rod holder, and the rod, which is integral with it, moves along the release direction, and the upstream valve becomes open;

[0034] The contents of the aerosol container flow into the pressurization chamber via the passage of the rod retainer, and the piston moves to the metering chamber side;

[0035] The contents of the metering chamber, now reduced in volume, are thus ejected into the external space via a downstream valve.

[0036] After the volume of the metering chamber reaches its minimum and the spraying of the contents has ended, when the operating unit is operated from the spraying mode to the stationary mode,

[0037] When the rod moves in the opposite direction to the release direction, the upstream valve becomes closed.

[0038] When the can moves relative to the rod holder in a direction opposite to the direction of the rod's release movement and releases the contact, the downstream valve becomes closed;

[0039] The tank moves further, and the intermediate valve becomes open.

[0040] The pressurization chamber and the metering chamber are connected, and the contents of the pressurization chamber are moved to the metering chamber.

[0041] (3) In (1) and (2) above, the following configuration is used:

[0042] The intermediate valve includes:

[0043] An intermediate valve body (e.g., the upwardly projecting portion 13a described later), the intermediate valve body being composed of a conical surface and a cylindrical surface connected to its outer periphery, is disposed on the rod retainer; and

[0044] An intermediate valve seat is disposed on the side of the tank. The intermediate valve seat has an annular stepped portion (e.g., the annular stepped portion 9b described later) that abuts against the inner circumference of the conical surface and a cylindrical hanging portion (e.g., the cylindrical portion 9c described later) that is slidably and liquid-tightly fitted to the outer circumferential surface of the cylindrical surface.

[0045] (4) In (1) to (3) above, the following configuration is used:

[0046] The valve body of the downstream valve (e.g., shaft 14 described later) can abut against the rod retainer and be forceped toward it.

[0047] (5) In (1) to (4) above, the following configuration is used:

[0048] The valve seat of the downstream valve is formed by an annular washer (such as the shaft washer 16 described later) disposed on the side of the tank.

[0049] The valve body of the downstream valve (e.g., shaft 14 described later) includes: a downstream valve annular step portion (e.g., step portion 14c described later), the downstream valve annular step portion being held on the inner circumferential surface of the annular washer and abutting against the content outflow side plane of the annular washer; a downstream valve conical surface (e.g., shaft conical surface 14d described later), the downstream valve conical surface abutting against the opposite side of the content outflow side plane; and a connecting orifice portion (e.g., upper transverse hole 14a described later), the connecting orifice portion being disposed in an annular recess between the downstream valve annular step portion and the downstream valve conical surface and closed by the inner circumferential surface.

[0050] The present invention focuses on a metering injection mechanism with such a structure and an aerosol product using compressed gas that has such a metering injection mechanism.

[0051] The effects of the invention

[0052] By employing the above structure, the present invention can reliably prevent back-pulling. Attached Figure Description

[0053] Figure 1 This is an explanatory diagram showing the stationary mode of the metering injection mechanism.

[0054] Figure 2 It is shown Figure 1 A diagram illustrating the injection mode of the quantitative injection mechanism.

[0055] Figure 3 It is shown Figure 1 A diagram illustrating the closed mode of the upstream valve of the quantitative injection mechanism.

[0056] Figure 4 It is shown Figure 1 A diagram illustrating the downstream valve closure mode of the metering injection mechanism.

[0057] Figure 5 It is shown Figure 1 A diagram illustrating the opening mode of the intermediate valve of the quantitative injection mechanism. Detailed Implementation

[0058] use Figures 1 to 5 This describes the manner in which the present invention is carried out.

[0059] In addition, the constituent elements of the following lettered reference numerals (e.g., the cylindrical drooping portion 5a) are, in principle, represented as part of the constituent elements of the numerical portion of the reference numerals (e.g., the operation button 5).

[0060] Here, in Figures 1 to 5 middle,

[0061] 1 indicates an aerosol container that contains the contents of the object to be sprayed and the compressed gas that is pressurized and released from the rod 3 described later as a propellant.

[0062] 2 indicates the mounting cup that is installed together with the gasket on the upper opening of the aerosol container 1;

[0063] 3 indicates a cylindrical rod (upstream valve) that is provided in the form of a through-hole in the central opening of the mounting cup 2 and that releases the contents of the aerosol container 1 from the upper end hole by pressing.

[0064] 4 indicates a cylindrical shoulder cover that is snapped onto the outer circumferential surface of the mounting cup 2 and guided vertically along the inner surface by a longitudinal rib-like portion;

[0065] 5 indicates that the top surface is the user's pressing operation object, and the operation button of the can 8 (described later) is stored inside below;

[0066] 5a represents a cylindrical hanging portion formed on the lower surface of the operation button 5, which is externally fitted into the upper inner surface of the inner cylindrical portion of the can body 9 (described later) and internally communicates with the back of the nozzle tip 6 (described later).

[0067] 6 indicates a cap-shaped nozzle tip located on the side of the operation button 5, which sprays the contents inside the cylindrical hanging part 5a from the central hole on the front to the external space area.

[0068] 7 indicates a cylindrical core disposed inside the nozzle tip 6, with a meandering flow path for the contents set on its outer periphery;

[0069] 8 indicates a can that engages with the lower interior of the operation button 5 and is composed of the can body 9 and the can lid 10, which will be described later.

[0070] 9 indicates the tank body, which is composed of an annular top plate and an outer cylindrical part and an inner cylindrical part hanging down from its inner and outer peripheries, and forms the upper side of the tank.

[0071] 9a represents the transverse hole formed on the upper side of the inner cylindrical part of the can body 9 and connecting the inside and outside of the inner cylindrical part;

[0072] 9b indicates the annular stepped portion (intermediate valve) located at the lower end of the inner cylindrical part of the tank body 9, which serves as the valve seat of the needle valve;

[0073] 9c represents the cylindrical portion (intermediate valve) hanging down from the outer periphery of the annular stepped portion 9b;

[0074] 10 represents the ring-shaped lid that fits into the lower end of the outer cylindrical part of the can body 9;

[0075] 11 represents an annular piston that slides up and down in a sealed state between the outer cylindrical part and the inner cylindrical part of the can body 9;

[0076] 12 indicates a piston spring disposed between the annular top plate of the tank body 9 and the piston 11, which applies downward force to the piston 11;

[0077] 13 indicates the rod-side component, i.e., the rod retainer, which engages with the central cylindrical part of the can lid 10 in a sealed state in a sliding manner and whose lower end is fitted with the rod.

[0078] 13a indicates the upward protrusion (intermediate valve) of the valve body of the needle valve, which is located on the upper side of the rod retainer 13 and consists of a horizontal top surface, an upward conical surface and an outer peripheral surface;

[0079] 13b indicates the upstream connecting hole that connects the rod 3 and the outer peripheral surface of the upward protrusion 13a;

[0080] 14 indicates a sheath-shaped shaft that is housed inside the cylindrical part of the can body 9 and has an opening on the lower side.

[0081] 14a indicates an upper transverse hole (downstream valve) through which the contents of the tank are sprayed from the top of the tank to the external space area in the spray mode, in a configuration that connects the inside and outside of shaft 14.

[0082] 14b indicates the lower transverse hole through which the contents of the can move up and down during the intermediate valve opening mode of the reset operation and the contents sprayed from the upper side of the can to the external space area during the spraying mode are arranged to connect the inner and outer sides of shaft 14.

[0083] 14c represents the downward stepped portion located on the outer peripheral surface above the upper transverse hole 14a, which abuts against the shaft washer 16 described later when not in the injection mode;

[0084] 14d represents the upward-facing tapered surface between the upper transverse hole 14a and the lower transverse hole 14b;

[0085] 15 indicates a shaft spring that is housed inside the cylindrical hanging part 5a and is positioned between the operation button 5 and the upper end of the shaft 14, exerting a downward force on the shaft 14;

[0086] 16 indicates an annular shaft washer (downstream valve) whose outer periphery is held by the operation button 5 and the upper tank 8, and whose shaft 14 passes through the central hole;

[0087] A represents the area below the piston 11 inside the tank 8, that is, the upstream receiving area (pressurization chamber) that receives the contents flowing in from the rod 3 and exerts upward force on the piston 11 during the injection mode;

[0088] B represents the area above the piston 11 inside the tank 8, that is, the downstream storage area (quantitative chamber) that receives the contents from the upstream storage area A when the intermediate valve is open during the reset action.

[0089] Here, the rod 3, shoulder cover 4, operating button 5, nozzle tip 6, core 7, can 8 (can body 9 + can cover 10), piston 11, rod retainer 13, and shaft 14 are made of plastics such as polypropylene, polyethylene, polyacetal, nylon, and polybutylene terephthalate.

[0090] In addition, the aerosol container 1, piston spring 12 and shaft spring 15 are made of plastic or metal, for example, the mounting cup 2 is made of metal, for example, and the shaft washer 16 is made of elastic material or rubber, for example.

[0091] Additionally, at the lower center of the mounting cup 2, there is a rod washer that, together with the rod 3, forms the upstream valve; a rod spring that applies upward force to the rod 3 and keeps the upstream valve in a closed state; and a housing (not shown) that holds them together with the lower end of the rod 3.

[0092] Furthermore, the restoring force generated by the shaft spring 15 in the stationary mode is set to be much weaker than the restoring force of the rod 3 in the closed state.

[0093] Figure 1 The static mode is shown when operation button 5 is not pressed.

[0094] At this time, rod 3 (upstream valve) is in the closed state at the top, and downstream valve is in the closed state with shaft 14 down and the upper transverse hole 14a closed by shaft washer 16.

[0095] Furthermore, the piston 11 is located at the lowest end, the upstream storage area A has the smallest volume, and the downstream storage area B contains the contents from the last operation.

[0096] In addition, when the container is not in use and air is contained in the downstream storage area B, air is sprayed into the external space area and the contents of the container are contained with just one spraying operation.

[0097] Figure 2 It shows the source of the Figure 1 The state of pressing operation button 5 indicates the spraying state (spraying mode) of the contents.

[0098] From Figure 1 When the operation button 5 is pressed in the static mode, the lower end of the shaft 14 abuts against the rod holder 13, and then the operation button 5 and the tank 8 which is integrated with it move downwards, and the upper horizontal hole 14a becomes open.

[0099] Furthermore, the upper conical surface of the upwardly protruding portion 13a abuts against the inner circumference of the annular stepped portion 9b, and the intermediate valve is in a closed state.

[0100] Through this contact, the rod holder 13 moves downward together with the rod 3, the operating button 5, and the tank 8, and the rod 3 (upstream valve) becomes open, allowing the contents of the container to flow upward from the cylindrical interior of the rod 3.

[0101] The contents from rod 3 flow into the upstream receiving area A via rod retainer 13, using its pressure to push piston 11 upward against piston spring 12.

[0102] As the piston 11 pushes upward, the downstream receiving area B shrinks, and the contents stored therein are sequentially sprayed into the external space area through the transverse hole 9a, the lower transverse hole 14b, the internal passage of the shaft 14, the upper transverse hole 14a, the gap between the nozzle tip 6 and the core 7, and the spray port in the center in front of the nozzle tip 6.

[0103] Since the intermediate valve is in a state where the inner circumference of the annular stepped portion 9b and the conical surface of the upwardly protruding portion 13a strongly abut against each other, it can block the strong pressure of the contents released from the rod 3.

[0104] The injection of contents ends (quantitative injection) when the piston 11 moves upward until it comes into contact with the upper end of the tank 8 and the volume of the downstream storage area B becomes minimal.

[0105] Additionally, due to the pressure of the contents flowing out from below the shaft washer 16, the shaft 14 may sometimes separate from the rod holder 13 and move upward.

[0106] Figure 3 This shows the initial stage of the reset action of the operation button 5 after the contents have been ejected, i.e., the upstream valve closed mode.

[0107] As the operation button 5 is gradually released, the operation button 5, the tank 8, the piston 11, the rod retainer 13, and the shaft 14 move upward together with the rod 3, and the rod 3 (upstream valve) becomes closed.

[0108] Figure 4 It shows the source of the Figure 3 The state further releases the intermediate stage of the reset action of pressing operation button 5, namely the downstream valve closing mode.

[0109] When the button is further released, the operating button 5 and the can 8 move upward relative to the lever 3, the lever holder 13, and the shaft 14 that abuts against it.

[0110] This is because the contents of the upstream receiving area A, which are pressurized by the piston 11 under the force of the piston spring 12, press down on the rod holder 13 relative to the can lid 10, or the restoring force of the shaft spring 15 or shaft washer 16 presses down on the shaft 14 that abuts against the rod holder 13.

[0111] At this time, the shaft washer 16 uses the restoring force to the flat plate state and the shrinking force of the central hole enlarged by the shaft tapered surface 14d to press the shaft 14 down.

[0112] Furthermore, since the shaft spring 15 also applies a downward force to the shaft 14, the shaft 14 moves relative to the shaft washer 16 without delay, and the inner circumferential surface of the shaft washer 16 is housed in the annular recess formed between the step portion 14c and the shaft tapered surface 14d, so that the upper transverse hole 14a is reliably closed.

[0113] In this way, since the stepped portion 14c is positioned by being in close contact with the upper surface of the shaft washer 16, the inner circumferential surface of the shaft washer 16 increases the closed and close contact area without deviating from the upper transverse hole 14a, reliably preventing the passage of contents.

[0114] In addition, the transverse hole 9a moves away from the conical surface of the upward protrusion 13a, but the cylindrical part 9c remains liquid-tightly fitted to the outer peripheral surface of the upward protrusion 13a, and the intermediate valve remains closed.

[0115] At this time, since the upstream valve based on rod 3 is switched to the closed state, the intermediate valve is not subjected to strong pressure from the contents of the container, but rather to weak pressure generated by the piston 11 on the contents of the upstream receiving area A by the force of the piston spring 12.

[0116] Furthermore, since the intermediate valve resists the weak pressure only during the intermediate stage of the reset action rather than permanently, the closed state can be adequately guaranteed even when the inner and outer circumferential surfaces formed by the inner circumferential surface of the cylindrical portion 9c and the outer circumferential surface of the upwardly protruding portion 13a are fitted together.

[0117] In this way, not only can the contact state of the conical surfaces of the transverse hole portion 9a and the upward protrusion portion 13a constituting the needle valve be set, but the closed state of the intermediate valve can also be set to a slightly separated state (approximately contacting state).

[0118] Thus, before the upper transverse hole 14a (downstream valve) that connects the downstream storage area B to the external space area can be reliably closed, the intermediate valve is kept closed, preventing contents from flowing from the upstream storage area A to the downstream storage area B, thereby preventing back-pulling.

[0119] Figure 5 It shows the source of the Figure 4 The state further releases the final stage of the reset action of pressing operation button 5, namely the intermediate valve opening mode.

[0120] From Figure 4 When the operation button 5 is pressed to further release the state, the operation button 5, the tank 8 and the shaft 14 move upward relative to the rod 3 and the rod holder 13, and the upper transverse hole 14a reliably becomes closed.

[0121] At this time, since the cylindrical part 9c leaves the outer peripheral surface of the upward protrusion 13a and the intermediate valve is in the open state, the upstream storage area A and the downstream storage area B are connected. The contents of the upstream storage area A are pushed out by the piston 11, which moves downward by the restoring force of the piston spring 12, and flow into the downstream storage area B in sequence through the intermediate valve, the lower transverse hole 14b, and the transverse hole part 9a.

[0122] Furthermore, when the piston 11 abuts against the can lid 10 and the upstream receiving area A reaches its minimum volume, it is transferred to... Figure 1 The static mode.

[0123] The contents of the downstream storage area B that flow in at this time become the target of the next spraying operation.

[0124] This invention is not limited to the embodiments described above, and may also include:

[0125] (11) Integrate the operation button 5 and the tank body 9 into one unit;

[0126] (12) The inner cylindrical part of the tank body 9 is set on the side of the tank cover 10;

[0127] (13) Make the rod retainer 13 larger in diameter and omit the can lid 10;

[0128] (14) The piston 11 and the piston spring 12 are integrally formed;

[0129] (15) The shaft 14 and the shaft spring 15 are integrally formed;

[0130] (16) The can lid 10 and the rod retainer 13 are integrally formed via a diaphragm.

[0131] The aerosol products to which this invention applies include cleaning agents, sweeping agents, coolants, muscle anti-inflammatory agents, hair growth agents, hair dyes, hair styling agents, hair conditioning agents, sunscreens, lotions, makeup removers, antiperspirants, cosmetics, shaving foams, food, droplet-shaped products (vitamins, etc.), pharmaceuticals, quasi-pharmaceuticals, horticultural agents, insecticides, insect repellents, animal repellents, deodorants, detergents, fire extinguishers, coatings, adhesives, lubricants, polyurethane foams, and other products for various uses.

[0132] As contents contained in aerosol containers, various forms such as liquid, cream, and gel are used. Components included in the contents may include powders, oils, alcohols, surfactants, polymers, active ingredients depending on the application, and water.

[0133] As a powder, metal salt powders, inorganic powders, or resin powders are used. For example, talc, kaolin, aluminum hydroxychloride (aluminum salt), calcium alginate, gold powder, silver powder, mica, carbonates, magnesium chloride, silicon dioxide, zinc oxide, titanium dioxide, zeolite, nylon powder, barium sulfate, cellulose, and mixtures thereof are used.

[0134] As oil components, silicone oils such as dimethyl polysiloxane, ester oils such as isopropyl myristate, palm oil, eucalyptus oil, camellia oil, olive oil, jojoba oil, hydrocarbon oils such as liquid paraffin, and fatty acids such as myristic acid, palmitic acid, stearic acid, linoleic acid, and linolenic acid are used.

[0135] As alcohols, they include monobasic lower alcohols such as ethanol, monobasic higher alcohols such as lauryl alcohol and cetyl alcohol, ethylene glycol, 1,3-butanediol and polyols such as glycerol.

[0136] As surfactants, anionic surfactants such as sodium lauryl sulfate, nonionic surfactants such as polyoxyethylene alkyl ethers or polyglycerol fatty acid esters, amphoteric surfactants such as lauryl dimethylaminoacetic acid betaine, and cationic surfactants such as alkyl trimethylammonium chloride are used.

[0137] As polymeric compounds, hydroxyethyl cellulose, methyl cellulose, gelatin, starch, casein, xanthan gum, carboxyvinyl polymers, etc. are used.

[0138] As an effective ingredient suitable for various applications, it is used in: dyes such as p-phenylenediamine and aminophenol; oxidants such as hydrogen peroxide; matching agents such as acrylic resins and waxes; ultraviolet absorbers such as 2-ethylhexyl p-methoxycinnamate; vitamins such as retinol and d1-α-tocopherol; moisturizers such as hyaluronic acid; anti-inflammatory and analgesic agents such as methyl salicylate and indomethacin; antibacterial agents such as sodium benzoate and cresol; insect repellents such as pyrethroids and diethylformamide; antiperspirants such as zinc p-phenolsulfonate; cooling agents such as camphor and menthol; anti-asthmatic drugs such as ephedrine and adrenaline; sweeteners such as sucrose and aspartame; adhesives and coatings such as epoxy resins and polyurethanes; dyes such as p-phenylenediamine and aminophenol; oxidants such as hydrogen peroxide; and fire extinguishing agents such as ammonium dihydrogen phosphate, sodium bicarbonate, and potassium bicarbonate.

[0139] In addition, suspending agents, emulsifiers, antioxidants, metal ion blocking agents, etc., other than those mentioned above, can also be used.

[0140] As the gas used for injecting the contents of aerosol products, compressed gases such as carbon dioxide, nitrogen, compressed air, nitrous oxide, oxygen, rare gases, and mixtures thereof are used.

[0141] Explanation of reference numerals in the attached figures

[0142] 1: Aerosol container

[0143] 2: Install the cup

[0144] 3: Stem (upstream valve)

[0145] 4: Shoulder cap

[0146] 5: Operation Buttons

[0147] 5a: Tubular hanging part

[0148] 6: Nozzle tip

[0149] 7: Core

[0150] 8: Can

[0151] 9: Tank body

[0152] 9a: Horizontal hole section

[0153] 9b: Annular stepped section (intermediate valve)

[0154] 9c: Cylindrical section (intermediate valve)

[0155] 10: Can lid

[0156] 11: Piston

[0157] 12: Piston Spring

[0158] 13: Rod retainer

[0159] 13a: Upward-convex part (intermediate valve)

[0160] 13b: Upstream connecting hole

[0161] 14: Axis

[0162] 14a: Upper transverse hole (downstream valve)

[0163] 14b: Lower side transverse hole

[0164] 14c: Stepped section (downstream valve)

[0165] 14d: Shaft tapered surface (downstream valve)

[0166] 15: Shaft Spring

[0167] 16: Shaft washer (downstream valve)

[0168] A: Upstream storage area (pressurization chamber)

[0169] B: Downstream storage area (quantification chamber).

Claims

1. A quantitative injection mechanism, characterized in that, It consists of the following: A rod for actuating the upstream valve on an aerosol container using compressed gas and an integral rod retainer through which the contents of the sprayed object pass; The can is liquid-tightly slidable and engages with the outer periphery of the rod holder in the direction of rod release, and its interior is connected to the cylindrical end via the upstream passage of the rod holder; The operating unit moves the tank by the user's operation; and A piston, which is liquid-tightly slidably disposed in such a manner as to divide the interior of the can into an upstream pressure chamber and a downstream metering chamber, applies force toward the pressure chamber. The quantitative injection mechanism includes: The intermediate valve, by substantially abutting against the rod holder in the direction of rod release, is closed, cutting off the connection between the pressurization chamber and the metering chamber; and A downstream valve, located on the metering chamber side of the tank, connects the metering chamber to the external space by transitioning from a closed to an open state through the closing state of the intermediate valve, or at least by transitioning to a closed state through a decrease in flow potential. The valve seat of the downstream valve is composed of an annular washer disposed on the side of the tank. The valve body of the downstream valve includes: a downstream valve annular step portion, which is held on the inner circumferential surface of the annular washer and abuts against the content outflow side plane of the annular washer; a downstream valve conical surface, which abuts against the opposite side of the content outflow side plane; and a connecting hole portion, which is disposed in an annular recess between the downstream valve annular step portion and the downstream valve conical surface and is closed by the inner circumferential surface.

2. The quantitative injection mechanism according to claim 1, characterized in that, When the operating unit is operated from stationary mode to spray mode The can moves relative to the rod holder along the release direction of the rod and the intermediate valve becomes closed; The connection between the pressurization chamber and the metering chamber is severed; The downstream valve is turned on, allowing the metering chamber to connect with the external space area; The can abuts against the rod holder, and the rod, which is integral with it, moves along the release direction, and the upstream valve becomes open; The contents of the aerosol container flow into the pressurization chamber via the passage of the rod retainer, and the piston moves to the metering chamber side; The contents of the metering chamber, now reduced in volume, are thus ejected into the external space via a downstream valve. After the volume of the metering chamber reaches its minimum and the spraying of the contents has ended, when the operating unit is operated from the spraying mode to the stationary mode, When the rod moves in the opposite direction to the release direction, the upstream valve becomes closed. When the can moves relative to the rod holder in a direction opposite to the direction of the rod's release movement and releases the contact, the downstream valve becomes closed; The tank moves further, and the intermediate valve becomes open. The pressurization chamber and the metering chamber are connected, and the contents of the pressurization chamber are moved to the metering chamber.

3. The quantitative injection mechanism according to claim 1 or 2, characterized in that, The intermediate valve includes: An intermediate valve body, comprising a conical surface and a cylindrical surface connected to its outer periphery, is disposed on the rod retainer; and An intermediate valve seat is disposed on the side of the tank. The intermediate valve seat has an annular stepped portion that abuts against the inner circumference of the conical surface and a cylindrical downward portion that is slidably and liquid-tightly fitted with the outer circumferential surface of the cylindrical surface.

4. The quantitative injection mechanism according to claim 1, characterized in that, The valve body of the downstream valve can abut against the rod retainer and be forceped toward it.

5. An aerosol product, characterized in that, It includes the metering injection mechanism according to any one of claims 1 to 4, and contains compressed gas for injection and contents.

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