JP2016150760A - Aerosol product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aerosol product which prevents overuse and maintains a stable jet state.SOLUTION: An aerosol product 10 includes: a container 11 having pressure resistance; a valve assembly 12 attached to an opening part of the container 11; and a content C containing a liquid gas stored in the container 11. The valve assembly 12 includes an extension unit 18 connected to an aerosol valve 16. A narrow tube 33 which introduces the content C of an extension chamber 31 into the aerosol valve 16 is provided in the extension unit 18.SELECTED DRAWING: Figure 1

Description

  The present invention relates to aerosol products.

  Aerosol products are excellent in cooling performance, so they are often used for spraying directly on the human body, such as antiperspirants, coolants, sunscreens, insect repellents, and anti-inflammatory analgesics. In addition, since aerosol products can be sprayed with fine particles, they are often used for spraying into a space such as a room fragrance, a deodorant, and an insecticide. Some of the above-mentioned aerosol products contain a large amount of flammable solvents such as ethanol and flammable liquefied gases such as liquefied petroleum gas, and they are designed with safety in mind. The contents can be ejected continuously by simply pressing, and the user recognizes the ejection amount only with his / her own sense, and may be overused.

In order to prevent overuse, it is conceivable to limit the injection amount by using a metering valve. However, when the aerosol valve housing is used as a metering chamber, a sufficient injection amount cannot be secured and When it is used, it is difficult to obtain a desired effect. In addition, when enlarging the housing of the aerosol valve, if the housing, which is the fixed amount chamber, is emptied by the volume of the contents injected by the injection, the vaporization of the liquefied gas proceeds by that amount, and the liquid in the housing (with the undiluted solution) The ratio between the liquefied gas) and the gas (the vaporized gas of the liquefied gas) changes, resulting in the injection with a lot of gas, and the injection state changes greatly during the injection and becomes unstable. Further, depending on the contents, the liquefied gas may be excessively vaporized, whereby the inside of the housing is cooled by the heat of vaporization and the injection state may change. Further, in that case, since the vaporized gas is preferentially discharged over the stock solution, the state that the injection continues until the vaporization of the entire amount of the liquefied gas is continued, and finally the stock solution may remain in the housing.
On the other hand, as disclosed in Patent Documents 1-3, means for enlarging the fixed-quantity chamber by connecting a small container to the aerosol valve housing has been proposed.

FIG. 9 of Patent Document 1 discloses a metering valve in which a small container is connected to the side of the housing. However, since it is connected to the housing at the upper part of the small container, when the valve is opened by the injection operation, the contents in the housing are injected, and at the same time, the contents in the small container are supplied into the housing from the upper part. . For this reason, as the contents in the small container are supplied to the housing through the injection operation, the contents in the small container are vaporized by the liquefied gas, and the contents in which the ratio of gas (vaporized gas) is increased in the housing. Will be supplied. For this reason, the same phenomenon as in the case of enlarging the housing described above occurs, and the injection state during the injection operation becomes unstable. And the undiluted | stock solution of the contents in a small container may remain.
Patent Document 2 discloses a quantitative valve in which an annular lower quantitative space region is added below an upper quantitative space region in a housing. However, the upper quantitative space area of this quantitative valve communicates with the outside via the annular passage and stem in the housing from the upper quantitative space area, whereas the lower quantitative space area is in the housing annular shape from the lower quantitative space area. It communicates with the outside through a passage and a stem, and merges at the entrance of the annular passage in the housing. That is, the contents of the lower quantitative space area are configured not to be supplied to the upper quantitative space area. Therefore, by injecting the contents, the contents are reduced in the upper quantification space area and the lower quantification space area, and the same phenomenon as in the case of enlarging the housing described above in each space area occurs, and the injection state during the injection operation May become unstable and the stock solution of the contents may remain in each. Furthermore, since the contents of the upper quantitative space region and the contents of the lower quantitative space region flowing through the annular passage surrounding the tube merge at the inlet of the annular passage in the housing, the flow is disturbed at the merging point, and the inside of the annular passage in the housing There is also a risk of excessive vaporization of the liquefied gas at
Patent Document 3 discloses a metering valve in which an annular additional metering chamber is added below the housing, and the additional metering chamber is on the upstream side of a passage that flows from the inside of the housing to the outside. However, in the metering valve of Patent Document 3, the passage from the additional metering chamber to the housing is a narrow annular passage surrounding the stem extension member, so the flow resistance is large and the content is supplied to the housing. When the contents in the housing are discharged, the liquefied gas may be excessively vaporized in the housing. In addition, when restrict | squeezing discharge | emission of the content in a housing, the injection quantity becomes small and it is hard to acquire a desired effect. On the other hand, when the annular passage is widened, the flow is disturbed at the joining point with the housing, which becomes a resistance, and excessive vaporization of the liquefied gas may occur in the housing.
Thus, the fixed quantity valve of any patent document has the problem that the injection state during injection operation is not stabilized.

Japanese Patent No. 3919985 JP 2011-235914 A JP 2008-308197 A

  An object of the present invention is to provide an aerosol product capable of preventing overuse and maintaining a stable injection state.

The aerosol product of the present invention is an aerosol product comprising a container having pressure resistance, a valve assembly attached to an opening of the container, and a content containing a liquefied gas accommodated in the container. The assembly includes an aerosol valve, a valve unit that blocks a passage between the inside of the aerosol valve housing and the container by lowering the stem of the aerosol valve, and an expansion unit connected to the housing. The expansion unit includes an expansion chamber for storing the contents, a connecting portion that communicates the housing and the expansion chamber, and a cylindrical thin tube that extends from the connecting portion to the bottom of the expansion chamber. It is characterized by having.
In the aerosol product according to the present invention, the expansion chamber has a through-hole communicating with the inside of the container, and the flow of fluid from the inside of the container to the expansion chamber is prevented in the through-hole, and the expansion chamber enters the container. It is preferable to provide a check valve that allows the flow of fluid.
Moreover, it is the aerosol product of this invention, Comprising: The said expansion chamber can expand-contract.

The aerosol product of the present invention is an aerosol product comprising a container having pressure resistance, a valve assembly attached to an opening of the container, and a content containing a liquefied gas accommodated in the container. The assembly includes an aerosol valve, a valve unit that blocks a passage between the inside of the aerosol valve housing and the container by lowering the stem of the aerosol valve, and an expansion unit connected to the housing. The expansion unit includes an expansion chamber for storing the contents, a connecting portion that communicates the housing and the expansion chamber, and a cylindrical thin tube that extends from the connecting portion to the bottom of the expansion chamber. Therefore, when the injection operation is performed, only the liquid phase of the contents in the expansion chamber can be supplied into the housing, and the liquid contents in the expansion chamber can be completely ejected. It can be injected in in a stable ejection state. In particular, since the contents of the expansion chamber are supplied into the housing through a cylindrical thin tube, the flow in the housing is not disturbed. That is, since the vaporization of the liquefied gas in the contents can be controlled, the injection state of the contents during the injection operation can be stabilized. As the contents are injected, vaporization of the liquefied gas proceeds in the expansion chamber, but the vaporized gas is not injected until after the liquid contents are injected. The vaporized gas remaining in the expansion chamber after injection is compressed and stored in the upper portion of the expansion chamber when the contents in the container are introduced into the expansion chamber after the injection operation is completed. The impact on things is small. In addition, in the case of aerosol products that are used for spraying directly into the human body or spraying into space, the volume of the expansion chamber is such that the desired effect according to the application is obtained, and the volume of the metering chamber must not be overused. This is to the extent that safety is ensured. Therefore, the user can obtain an excellent effect of the liquefied gas according to the use, and can stably inject the contents to prevent overuse, and the safety is high.

In the aerosol product according to the present invention, the expansion chamber has a through-hole communicating with the inside of the container, and the flow of fluid from the inside of the container to the expansion chamber is prevented in the through-hole, and the expansion chamber enters the container. If a check valve that allows the flow of fluid is provided, the contents containing the liquefied gas or the liquefied gas, and further the compressed gas as the pressurizing agent, after assembling the aerosol container, from the aerosol valve to the expansion chamber The container can be filled via
In the aerosol product of the present invention, when the expansion chamber is extendable and contractible, the contents in the housing are jetted and the expansion chamber contracts as the contents are supplied to the housing, so that the liquefied gas is vaporized. The expansion chamber is constantly filled with the liquid contents, and the spray state can be stabilized for a longer time. Furthermore, after the injection operation is completed, the expansion chamber can be filled with a large amount of liquid content, and the maximum injection amount for each injection (the amount of content that can be filled into the quantitative chamber) is stabilized.

It is side surface sectional drawing which shows one Embodiment of the aerosol product of this invention. FIG. 2 is a partially enlarged view of FIG. 1. 3a and 3b are partial side sectional views showing before and after operation of the aerosol product of FIG. It is side surface sectional drawing which shows other embodiment of the aerosol product of this invention. It is side surface sectional drawing which shows other embodiment of the aerosol product of this invention. 6a and 6b are partial side sectional views showing before and after operation of still another embodiment of the aerosol product of the present invention. 7a and 7b are partial side sectional views showing before and after operation of still another embodiment of the aerosol product of the present invention.

The aerosol product 10 in FIG. 1 includes a container 11 having pressure resistance, a valve assembly 12 attached to an opening of the container 11, and a content C containing liquefied gas stored in the container 11. The valve assembly 12 includes an expansion unit 18 connected to the aerosol valve 16, and the expansion unit 18 is provided with a narrow tube 33 for introducing the contents C of the expansion chamber 31 into the aerosol valve 16.
The aerosol product 10 sprays the contents C using a push button 15 or the like provided with an injection hole 15 a attached to the stem 23 of the aerosol valve 16.

The container 11 is made of metal, and has a cylindrical body part 11a whose lower end is closed by a bottom part, and a tapered shoulder part 11b provided so as to reduce in diameter upward from the upper part of the body part, And a bead 11c formed in an annular shape at the upper end of the shoulder.
The container 11 is made of, for example, a metal disk such as aluminum made into a bottomed cylinder (body 11a) by impact processing and / or drawing and ironing, and provided with a synthetic resin coat on the inner surface, and then on the upper end of the body 11a. Necking is performed to form the shoulder portion 11b, and the upper end of the shoulder portion 11b is curled to form the bead 11c.
However, the container 11 may be formed of other materials such as synthetic resin and glass. Moreover, the shape of the container 11 will not be specifically limited if the content C which is a fluid can be accommodated.

  The valve assembly 12 includes an aerosol valve 16 that closes the container 11, a valve unit 17 that blocks a passage between the housing 22 of the aerosol valve 16 and the container 11 by lowering the stem 23 of the aerosol valve 16. And an expansion unit 18 connected to the housing 22.

  As shown in FIG. 2, the aerosol valve 16 includes a mounting cup 21 attached to the opening of the container 11, a cylindrical housing 22 fixed to the center of the mounting cup 21, and a vertical movement inside the housing 22. A stem 23 that is freely accommodated, a ring-shaped stem rubber 24 that is fixed between the mounting cup 21 and the housing 22 and has the stem 23 inserted in the center, and a spring 25 that constantly biases the stem 23 upward. Have

  The mounting cup 21 is a ring shape that connects the housing holding portion 21a that covers the upper portion of the housing 22, the curl portion 21b that covers the bead 11c of the container 11 via the annular seal member 20, and the housing holding portion 21a and the curled portion 21b. The top plate portion 21c. A stem insertion hole 21d through which the stem 23 is passed is formed at the center of the upper bottom of the housing holding portion 21a. The mounting cup 21 and the container 11 are fixed by pressing the mounting cup 21 (valve assembly 12) downward against the container 11 while the inner lower end 21e of the curled portion 21b of the mounting cup 12 is placed on the inner surface of the shoulder 11b of the container 11. Do it with caulking.

The housing 22 is a cylinder having a bottom 22a. A rubber holding portion 22b that supports the stem rubber 24 is formed in the upper end opening. A center hole 22c is formed in the center of the bottom 22a. One communication hole 22 d for connecting the expansion unit 18 is formed in the lower part of the side surface of the housing 22. A valve mounting portion 22 e is provided on the lower surface of the housing 22. In this embodiment, the valve attachment portion 22e is a cylindrical body that extends downward from the lower surface edge of the bottom portion 22a.
The volume in the housing 22 is preferably 0.5 ml or less, particularly 0.3 ml or less. If it is larger than 0.5 ml, the liquefied gas is liable to vaporize before all the contents in the housing 22 are discharged to the outside at the time of injection, and the injection state may change during the injection. Then, the vaporized gas is discharged preferentially over the stock solution, and the injection continues until the vaporization of the liquefied gas is completed, so that there is a greater possibility that the stock solution will remain in the housing.
The shape of the housing 22 is cylindrical in FIG. 1, but it is a rectangular cylinder or a cylinder whose section is cut out of a circle so that the expansion unit 18 can be easily connected and the outlet of the communication hole 22 d is flat. It is good.

The stem 23 includes a cylindrical stem body 23a, a reduced diameter valve rod 23b provided below the stem 23, and an annular step portion 23c formed between the stem body 23a and the valve rod 23b. The stem body 23a is formed with an in-stem passage 23a1 extending downward from the center of the upper end, and a stem hole 23a2 extending from the lower side surface of the stem body 23a toward the in-stem passage 23a1. The valve stem 23 b extends to the vicinity of the lower end of the center hole 22 c of the bottom 22 a of the housing 22.
The stem rubber 24 is a ring-shaped elastic body that closes the stem hole 23a2. The stem rubber 24 is fixed between the rubber holding portion 22b and the upper bottom of the housing holding portion 21a of the mounting cup 21.
The spring 25 is held between the bottom 22 a of the housing 22 and the annular step 23 c of the stem 23.

The valve unit 17 includes an annular valve body 26 having elasticity, a valve rod 23 b that closes the center hole 26 a, and a cylindrical valve fixing member 27 that fixes the valve body 26 to the lower end of the housing 22.
The valve body 26 includes an annular holding portion and an annular sealing portion that protrudes obliquely downward from the inner edge of the holding portion, or is curved so that the lower surface protrudes downward, and the center of the sealing portion is the center. It is a hole 26a.
The valve fixing member 27 includes a cylindrical valve support portion 27a inserted into the valve mounting portion 22e of the housing 22, a bottom portion 27b having a lower end closed and a through hole 27b1 formed in the center thereof, and a lower surface from the lower surface. It consists of a cylindrical tube holding part 27c that extends. The tube holding portion 27 c is provided with a dip tube 29 that guides the contents C in the container 11 to the housing 22. The holding part of the valve body 26 is sandwiched between the lower surface of the bottom part 22a of the housing 22 and the valve support part 27a of the valve fixing member, so that the valve body 26 is fixed.
With this configuration, when the stem 23 is lowered, the valve rod 23b closes the central hole 26a of the valve body 26 of the valve unit 17, and the passage between the housing 22 and the container 11 of the aerosol valve 16 is blocked. To do.

  The expansion unit 18 includes an expansion chamber 31 that stores the contents C, a connection portion 32 that communicates the housing 22 and the expansion chamber 31, and a narrow tube 33 that extends from the connection portion 32 to the bottom 31 a of the expansion chamber 31. Yes. The expansion unit 18 is attached to a position that is substantially upstream of a passage through which the content C flows from the housing 22 to the outside in a state where the valve unit 17 is closed (injection operation). That is, in the housing 22 and the expansion chamber 31 serving as the fixed-quantity chamber, the contents C are configured to flow up to the stem 23 in the order of the expansion chamber 31, the housing 22, and the stem 23. Is configured so as not to be disturbed.

The expansion chamber 31 is a cylinder having a bottom 31a, and a through hole 31b is formed on the lower side surface. And the cylindrical elastic body 31c is provided in the side surface of the expansion chamber 31 so that the through-hole 31b may be covered. The elastic body 31 c constitutes a check valve that allows a fluid flow from the expansion chamber 31 into the container 11 and prevents a fluid flow from the container 11 to the expansion chamber 31. The structure of the check valve is not particularly limited, and for example, a check valve composed of a ball valve may be used. The expansion chamber 31 is configured such that the check valve through-hole 31 b communicates with the gas phase of the contents C in the container 11. However, you may make it communicate with the liquid phase of the content C like FIG.
The volume of the expansion chamber 31 is such that a desired effect corresponding to the application can be obtained. In detail, although it changes with kinds of the content with which it fills, in the case of the aerosol product of the use sprayed directly to a human body, it is preferable to set it as 0.3-3 ml, especially 0.5-2 ml. In the case of an aerosol product for use in spraying into the space, the amount is preferably 0.3 to 5 ml, particularly 0.5 to 3 ml. The expansion chamber 31 is preferably 2 to 20 times the volume of the housing. At this time, a stable injection state can be maintained, and the volume of the fixed-quantity chamber is set to such an extent that the contents C are not used excessively and safety is ensured.
Moreover, although the injection time by the fixed_quantity | quantitative_assay chamber (the housing 22 and the expansion chamber 31) changes also with the density | concentration of a content, the volume of the space to inject, etc., when it is a use in which a content is directly injected into a human body, If it is used for 5 seconds, especially 1 to 3 seconds, and the contents are jetted into the space, if it can be jetted for 1 to 10 seconds, especially 2 to 5 seconds, satisfaction of use by the user can be obtained. be able to.
The connection portion 32 includes a cylindrical insertion portion 32 a that is inserted into the communication hole 22 d of the housing 22, and a connection-portion passage 32 b that connects the housing 22 and the expansion chamber 31 is formed.
The narrow tube 33 extends from the connecting portion passage 32b to the bottom portion 31a of the expansion chamber 31. In this embodiment, the thin tube 33 is formed integrally with the connecting portion 32. The cross-sectional area of the passage from the housing 22 to the expansion chamber 31 (the passage in the coupling portion 32 b and the thin tube 33) is preferably larger than the cross-sectional area of the passage (stem hole) from the housing 22 to the outside. Specifically, it is preferably 1.5 to 20 times, particularly 2 to 15 times. Thereby, the vaporization of the liquefied gas in the contents supplied from the expansion chamber 31 into the housing 22 can be suppressed during the injection, and the stable injection can be maintained.

The content C consists of a stock solution and a liquefied gas.
Examples of the stock solution include a stock solution in which an active ingredient is blended in an alcoholic solvent such as ethanol and an oily solvent such as kerosene, and a stock solution in which the active ingredient is blended in water such as purified water or an aqueous solvent such as an aqueous alcohol solution.
The liquefied gas has excellent effects such as turning the stock solution into a fine mist and imparting a cooling effect. Examples of the liquefied gas include liquefied petroleum gas, dimethyl ether, hydrofluoroolefin, and mixed gas thereof.
The contents include products containing as much as 30 to 95% by mass of liquefied gas, for example, space products such as insecticides, fragrances, deodorants, pollen removers, antiperspirants, coolants, sunscreens, hot flashes It is used in human body products such as remedies, body sprays, anti-inflammatory analgesics, and athlete's foot drugs.

The aerosol product 10 can be filled with a liquefied gas after the container is filled with the stock solution and the valve assembly is fixed to the opening of the container. Specifically, the stem 23 of the aerosol container filled with the stock solution is pushed down to close the valve unit 17, and the liquefied gas is filled from the stem 23 through the expansion unit 18. That is, the liquefied gas enters the housing 22 from the stem 23, and is filled into the container 11 while pushing the elastic valve 31c from the through hole 31b through the expansion chamber 31 of the expansion unit 18.
However, just before the valve assembly is fixed to the container, the liquefied gas may be filled by undercup filling that fills from between the container and the valve assembly. Specifically, the container 11 is filled with the stock solution, and the liquefied gas is filled from between the bead 11 c of the container 11 and the curl portion 21 b of the mounting cup 21 with the valve assembly 12 held above the container 11. Immediately thereafter, the valve assembly 12 is lowered and the valve assembly 12 is fixed to the container 11.

  In the aerosol product 10 configured in this manner, the housing 22 and the container 11 are in communication with each other in a state before the injection operation, so that the contents are contained in the housing 22 and the expansion chamber 31 as shown in FIG. C is full. The contents can be ejected by operating the ejection member such as the push button 15 to lower the stem 23. That is, as shown in FIG. 3b, the stem hole 23a2 of the stem body 23a is opened from the stem rubber 24, and at the same time, the valve rod 23b closes the central hole 26a of the valve body 26, and the space between the housing 22 and the container 11 is Blocked. Therefore, the contents C in the fixed quantity chamber (the housing 22 and the expansion chamber 31) are injected from the stem 23 (the push button 15), and the injection stops when the contents C disappears.

At this time, since the housing 22 and the expansion chamber 31 communicate with each other through a cylindrical passage including the cylindrical thin tube 33, when the content C in the expansion chamber is supplied into the housing 22, the content C It sucks up smoothly and does not disturb the flow in the housing 22. Furthermore, since the expansion unit 18 (expansion chamber 31) is attached at a position that is substantially upstream with respect to the housing 22 during the injection operation, the expansion chamber 31, the expansion chamber 31, The contents C flow in the order of the housing 22 and the stem 23. That is, the flowing contents do not collide with each other, and the flow is not disturbed further. And since the liquid of the contents C is supplied into the housing 22 from the bottom part in the expansion chamber 31, the stable ejection state can be maintained until the liquid contents are completely ejected. In other words, the vaporized gas of the liquefied gas is mixed in the middle of the injection and the ratio of the raw solution to the liquefied gas changes, or the pressure of the content C to be injected is cooled by the heat of vaporization and the injection momentum is reduced. The injection state does not change midway after the injection operation, such as weakening or continuing a small amount of injection. Further, even if the user continues to push the push button 15 or the like, the content exceeding the volume of the metering chamber (the sum of the volumes of the housing 22 and the expansion chamber 31) is not ejected. Even if it contains a flammable undiluted solution or liquefied gas, it is safe for the user.

  When the injection operation to the aerosol product 10 is stopped, the stem 23 rises and returns to the state of FIG. 3a. Thereby, the stem hole 23a2 of the stem main body 23a is closed by the stem rubber 24, and at the same time, the valve rod 23b is pulled out from the center hole 26a of the valve body 26, and the housing 22 and the container 11 are communicated. At this time, since the inside of the fixed quantity chamber (the housing 22 and the expansion chamber 31) is at a low pressure relative to the inside of the container 11, the contents C are supplied from the container 11. And the residual gas (vaporized gas of liquefied gas) after injection in the fixed quantity chamber (the housing 22 and the expansion chamber 31) is pushed out into the contents C, introduced into the expansion chamber 31, and compressed by the pressure of the contents. Its volume is reduced. Since the compressed vaporized gas is lighter than the liquid content, it accumulates in the upper part of the expansion chamber. Residual gas may remain in the housing 22 and may accumulate in the upper portion of the housing 22. However, since this residual gas is injected first at the same time as the injection operation, it is discharged outside without affecting the injection state of the contents.

The aerosol product 40 shown in FIG. 4 has an expansion chamber having an annular shape and a large volume. Specifically, the container 11 includes a pressure-resistant container 11, a valve assembly 41 attached to the opening of the container 11, and a content C containing liquefied gas stored in the container 11. Container 11 and contents C are substantially the same as aerosol product 10 of FIG.
The valve assembly 41 is connected to the aerosol valve 42, a valve unit 43 that blocks the passage between the housing 42a of the aerosol valve 42 and the container 11 by lowering the stem 23 of the aerosol valve 42, and the housing 42a. And an expansion unit 44.

  In the aerosol valve 42, a housing 42a has a plurality of communication holes 22d formed on the side surface, and a top plate 42b protruding outward in the radial direction is formed above the communication holes 22d. In this embodiment, two communication holes 22d are formed. The housing 42a is substantially the same as the housing 22 of the aerosol product 10 of FIG. 1 except that the top plate 42b is formed. The aerosol valve 42 is substantially the same as the aerosol valve 16 of the aerosol product 10 of FIG. 1 except for the housing.

  The valve unit 43 includes an elastic valve body 26, a valve rod 23 b that closes the center hole 26 a, and a tubular valve fixing member 27 that fixes the valve body 26 to the lower end of the housing 22. In this embodiment, the valve fixing member 27 is integrated with the inner surface of an inner wall 46b of the expansion unit 44 described later.

  The expansion unit 44 includes an expansion chamber 46 that stores the contents C, a connecting portion 47 that communicates the housing 42 a with the expansion chamber 46, and a narrow tube 48 that extends from the connecting portion 47 to the bottom 46 a of the expansion chamber 46. Yes. The expansion unit 44 is attached at a position that is substantially upstream with respect to the housing 22 during an injection operation, similar to the aerosol product 10 of FIG.

  The expansion chamber 46 has an annular storage space, and has an annular inner wall 46b, an annular outer wall 46c, and a bottom 46a that connects them at the lower end. The upper part of the outer wall 46c is a connection part 46c2 whose diameter is increased via an annular step part 46c1. The upper end of the inner wall 46b and the upper surface of the annular step 46c1 are the same height. The connecting portion 46c2 is connected to the top plate 42b of the housing 42a, and the annular storage space is closed. The bottom 46 a is provided with a check valve that allows the flow from the expansion chamber 46 to the container 11 and blocks the flow from the container 11 to the expansion chamber 46. Specifically, a through cylinder 46d that passes through the bottom 46a and has a closed lower end extends downward, and a through hole 46e is formed in the through cylinder 46d. A cylindrical elastic body 46f is provided around the through cylinder 46d so as to cover the through hole 46e.

The connecting portion 47 is a disc-shaped member having a central hole that is placed on the upper end of the inner wall 46b and the upper surface of the annular stepped portion 46c1. Further, the upper surface is formed with a recessed portion 47a so as to communicate with the communication hole 22d of the housing 42a, leaving the outer end 47b. The outer end 47b is sandwiched between the top plate 42b of the housing 42a and the annular step 46c1 of the outer wall 46c, and the connecting portion 47 is fixed. Further, a narrow tube connecting hole 47c is formed in the recess 47a so as to communicate with the inside of the expansion chamber 46. The narrow tube connecting hole 47c is formed with an annular step 47c1 that is reduced in diameter radially inward. In this embodiment, two thin tubes 48 are provided, and two thin tube connection holes 47c are formed. However, the number thereof is not particularly limited.
The narrow tube 48 has a flange portion 48a formed on the upper portion thereof so as to be able to engage with the annular step portion 47c1 of the thin tube connection hole 47c.

  The aerosol product 40 can also be filled with the liquefied gas from the stem 23 after assembling the aerosol container in the same manner as the aerosol product 10 of FIG. However, undercup filling may be performed similarly.

  The aerosol product 40 of FIG. 4 has a large expansion chamber, so that it is possible to inject a large amount of contents at a time, and the aerosol product of FIG. Operates substantially the same as 10. That is, even when the stem 23 is lowered, a fixed amount (the sum of the volumes of the housing 42a and the expansion chamber 46) or more is not injected, so that it is safe for the user and the injection state therebetween is stable.

  The aerosol product 50 of FIG. 5 uses a translucent container 51, and the state of the expansion chamber can be visually recognized. Specifically, the container 51 having pressure resistance and translucency, a valve assembly 52 attached to the opening of the container 51, and a content C containing liquefied gas stored in the container 51 are provided. Content C is substantially the same as the aerosol product 10 of FIG.

The container 51 is provided at the upper end of the shoulder, a cylindrical body 51a whose lower end is closed by the bottom, a tapered shoulder 51b provided so as to reduce the diameter upward from the upper end of the body. This is a container made of synthetic resin such as translucent polyethylene terephthalate, which has a neck portion 51c and a flange portion 51d provided at the upper end thereof.
However, the container 51 may be formed of other materials such as glass. Moreover, the shape will not be specifically limited if the content C which is a fluid can be sealed.

  The valve assembly 52 is connected to the aerosol valve 16, the valve unit 17 that blocks the passage between the housing 22 and the container 11 of the aerosol valve 16 by lowering the stem 23 of the aerosol valve 16, and the housing 22. And an expansion unit 55. The aerosol valve 16 is substantially the same as the aerosol product 10 of FIG. 1 except that the curled portion 21b of the mounting cup 21 covers the flange portion 51d of the container 51 with the sealing material 20 interposed therebetween. The valve unit 17 is substantially the same as the aerosol product 10 of FIG.

The expansion unit 55 includes an expansion chamber 56 that stores the contents C, a connecting portion 57 that communicates the housing 22 and the expansion chamber 56, and a narrow tube 58 that extends from the connecting portion 57 to the bottom 56 a of the expansion chamber 56. Yes. The expansion unit 55 is also attached at a position that is substantially upstream with respect to the housing 22 during the injection operation.
The expansion chamber 56 includes a cylindrical main body 61 having translucency and a check valve 62 attached to the lower end thereof. By appropriately selecting the length of the main body 61, the capacity (a single injection amount) can be adjusted.
The main body 61 has a scale on the outer periphery so that the capacity of the expansion chamber can be seen. Thereby, it is comprised so that the injection quantity can be confirmed from the outside. The main body 61 has a lower end extending to the vicinity of the bottom of the container 51, and a through hole 62 c of a check valve 62 described later is configured to communicate with the liquid phase of the contents C. However, it may communicate with the gas phase.
The check valve 62 has a cylindrical body 62a attached to the lower end of the main body 61 with a closed lower end, an annular recess 62b formed on the outer peripheral surface thereof, and a through hole that communicates the inside of the cylindrical body 62a with the annular recess 62b. A hole 62c and a ring-shaped elastic body 62d attached to the annular recess 62b are provided. With this configuration, the check valve 62 allows the flow of fluid from the expansion chamber 56 to the container 51 and blocks the flow of fluid from the container 51 to the expansion chamber 56. However, the check valve may have another known structure.

  This aerosol product 50 can also be filled with the liquefied gas after assembling the container in the same manner as the aerosol product 10 of FIG. 1 or by undercup filling.

  In the aerosol product 50, since the container 51 and the expansion chamber 56 have translucency, the state (amount) of the contents C filled in the expansion chamber 56 can be confirmed, except for the aerosol product 10 in FIG. Operates in substantially the same way. That is, even when the stem 23 is lowered, a fixed amount (the sum of the volume of the housing 22 and the expansion chamber 56) or more is not injected, so that the user is safe and excellent in the feeling of use, and the injection state therebetween is stable. ing.

The aerosol product 70 in FIG. 6 is a container in which the expansion chamber 71 expands and contracts in the radial direction. Specifically, the body portion of the container is a pleated container provided with a fold line 71a extending vertically. Other configurations are substantially the same as the aerosol product 10 of FIG.
By using the expansion chamber 71 as an expansion / contraction container in this way, when the contents C are supplied from the expansion chamber 71 through the thin tube 28 to the housing 22 during injection, the expansion chamber 71 contracts by the volume, The vaporization of the liquefied gas in the expansion chamber 71 can be suppressed. After the injection, the expansion chamber 71 is filled with the contents C, and the expansion chamber 71 is expanded by the amount filled. Therefore, the filling amount of the contents C filled in the expansion chamber 71 after the injection can be substantially the full amount of the expansion chamber 71. Further, since vaporization in the expansion chamber 71 can be prevented, the supply of vaporized gas from the expansion chamber 71 to the housing 22 can be suppressed after supplying the entire amount of the contents of the expansion chamber 71 to the housing 22, and the injection state Is more stable. Further, since the expansion chamber 71 expands and contracts in the radial direction because it is a pleated container, the vertical length can be maintained, and the narrow tube 33 is closed by the bottom of the expansion chamber 71 as the expansion chamber 71 contracts. The contents in the expansion chamber 71 can be stably supplied to the housing. Further, by using the light transmissive container 51 shown in FIG. 5 as the container, the user can visually confirm the expansion and contraction of the expansion chamber 71.
In addition, as an expansion chamber, a container 81 (for example, a bellows container in which a horizontal crease is formed in the trunk portion) as shown in the aerosol product 80 in FIG. For example, a container (balloon) urged in a direction in which the body part contracts or a container urged in a direction in which the body part expands) may be used. In that case, it is possible to prevent the opening of the narrow tube 82 from being blocked by using a soft tube (for example, a tube of synthetic resin such as polyethylene) that deforms as the narrow tube 82 contracts in the axial direction of the expansion chamber. The contents C in 71 can be stably supplied to the housing 22. In the case of an elastic container that expands and contracts in all directions, a tube having an opening on the lower side surface may be used.

C Contents 10 Aerosol Product 11 Container 11a Body 11b Shoulder 11c Bead 12 Valve Assembly 15 Push Button 15a Injection Hole 16 Aerosol Valve 17 Valve Unit 18 Expansion Unit 20 Sealing Material 21 Mounting Cup 21a Housing Holding Part 21b Curled Part 21c Top Plate Part 21d Stem insertion hole 21e Inner lower end 22 Housing 22a Bottom part 22b Rubber holding part 22c Center hole 22d Communication hole 22e Valve mounting part 23 Stem 23a Stem body 23a1 Stem passage 23a2 Stem hole 23b Valve rod 23c Annular step part 24 Spring rubber 26 Valve body 26a Center hole 27 Valve fixing member 27a Valve support portion 27b Bottom portion 27b1 Through hole 27c Tube holding portion 28 Tube 29 Dip tube 31 Expansion chamber 3 a bottom part 31b through-hole 31c elastic body 32 connecting part 32a insertion part 32b connecting part inner passage 33 narrow tube 40 aerosol product 41 valve assembly 42 aerosol valve 42a housing 42b top plate 43 valve unit 44 expansion unit 46 expansion chamber 46a bottom part 46b inner wall 46c Annular step portion 46c2 Connection portion 46d Through tube 46e Through hole 46f Elastic body 47 Connection portion 47a Recessed portion 47b Outer end 47c Narrow tube connection hole 47c1 Annular step portion 48 Narrow tube 48a Flange portion 50 Aerosol product 51 Container 51a Body portion 51b Shoulder portion 51c 51d Flange portion 52 Valve assembly 55 Expansion unit 56 Expansion chamber 57 Connection portion 58 Narrow tube 61 Main body 62 Check valve 62a Tubular body 62b Annular recess 62c Through hole 62d Elastic body 70 Air Lumpur product 71 expansion chamber 71a folds 80 aerosol product 81 container 82 tubules

Claims (3)

A container having pressure resistance;
A valve assembly attached to the opening of the container;
An aerosol product comprising a liquefied gas-containing content contained in the container,
The valve assembly includes: an aerosol valve; a valve unit that blocks a passage between the inside of the aerosol valve housing and the container by lowering a stem of the aerosol valve; and an expansion unit coupled to the housing Have
The expansion unit includes an expansion chamber for storing the contents, a connecting portion that communicates the housing and the expansion chamber, and a cylindrical thin tube that extends from the connecting portion to the bottom of the expansion chamber. ,
Aerosol products. The expansion chamber has a through hole communicating with the inside of the container;
A check valve is provided in the through-hole to prevent the flow of fluid from the inside of the container to the expansion chamber and to allow the flow of fluid from the expansion chamber to the inside of the container.
The aerosol product according to claim 1. The expansion chamber is extendable;
The aerosol product according to claim 1.