JP4407268B2 - Button for intermittent injection - Google Patents

Description

  The present invention relates to an intermittent injection button attached to an aerosol container.

  The intermittent injection button of the aerosol container is for ejecting the contents of the aerosol container in a pulsed manner from the injection port while operating the button to open the valve of the aerosol container.

  When an aerosol container equipped with an intermittent spray button is used as a spraying device for a hair restorer, a blood circulation promoter, or the like, the agent can be spread over the skin and scalp and a massage effect can be obtained.

  Various structures of the intermittent injection button are known. For example, a cylinder communicating with the stem of the aerosol container, a pressure chamber formed in the cylinder, a coil spring, etc. Accordingly, there is a valve body that moves in the cylinder in response and repeatedly opens and closes the pressure chamber, and an injection port that communicates with the pressure chamber via the valve body. According to this intermittent injection button, while the button is pushed into the aerosol container side, the stem is pushed down, the aerosol valve is opened, and the internal pressure of the pressure chamber is kept at a predetermined pressure while the contents are flowing into the pressure chamber. When the pressure is higher, the valve body opens and the contents are injected from the injection port.When the internal pressure of the pressure chamber decreases due to the injection, the valve body closes to interrupt the injection, and when the internal pressure of the pressure chamber increases due to the interruption of injection, the valve The body opens and the contents are sprayed again. And this injection | pouring and interruption are repeated as long as the button is pushed in, and the content is injected in a pulse form (patent documents 1 and patent documents 2).

In the intermittent injection button, after the pushing operation is canceled and the content injection is stopped, one shot of post injection may occur. Therefore, it has been proposed that the front of the injection port be covered with a shield when the pushing operation is released (Patent Document 3).
JP 2000-335663 A Japanese Patent Laid-Open No. 7-96226 Japanese Patent Laid-Open No. 2002-2840

  However, as described in Patent Document 3, when the front of the injection port is covered with a shield when the pushing operation is released, the content of the post-injection hits the shield or falls, and the surroundings are soiled. Occurs.

  In contrast, an object of the present invention is to eliminate the occurrence of post-injection in an intermittent injection button attached to an aerosol container.

  The inventor of the present invention, the post-injection that occurs in the intermittent injection button occurs when the valve body does not return to the original closed position in the cylinder and stops at an unstable position after releasing the push-in operation of the button. In order to solve this problem, when the pushing operation of the intermittent injection button is released, the volume of the storage space for the contents in the button is increased to make the pressure chamber in a reduced pressure state, and the valve body is initially stably closed. It was found that it is effective to return to the position.

  That is, the present invention is an intermittent injection button attached on the stem of an aerosol container. The button is provided in the housing, the cylinder communicated with the stem, the pressure chamber formed in the cylinder, and the internal pressure of the pressure chamber. In response to the valve body that repeatedly opens and closes the pressure chamber, it has an injection port that communicates with the pressure chamber via the valve body, and further, the storage space for the contents between the pressure chamber and the stem is used as an aerosol for the intermittent injection button. Provided is an intermittent injection button provided with a pressure adjusting device that increases when the pressure is released with respect to a state of being pressed toward the container.

  The present invention also provides an intermittent injection container in which the intermittent injection button is attached to the aerosol container.

  According to the intermittent injection button of the present invention, the storage space for the contents between the pressure chamber and the stem is increased when the pressure is released with respect to the state where the intermittent injection button is pressed toward the aerosol container. Since the pressure adjusting device is provided, the pressure chamber is in a depressurized state when the push-in operation of the intermittent injection button is released. Therefore, the valve body returns to the state in which the valve is stably closed without stopping at an unstable position in the cylinder. Therefore, according to the intermittent injection button of the present invention, the post-injection that occurs when the valve body after injection stops at an unstable position in the cylinder can be eliminated.

  Hereinafter, the present invention will be specifically described with reference to the drawings. In each figure, the same numerals indicate the same or equivalent components.

  FIG. 1 is a partial cross-sectional view of an intermittent injection container 1 of the present invention in which an intermittent injection button 10A according to an embodiment of the present invention is attached to an aerosol container 2. The inside of the button is filled with the contents of the aerosol container 2. There is no initial state. 2A to 2D are cross-sectional views for explaining the operation of the intermittent injection button 10A.

  In this intermittent injection container 1, the aerosol container 2 is composed of a pressure-resistant container, and contains, for example, a stock solution A such as a hair restorer and a blood circulation promoter, and carbon dioxide, nitrogen gas, nitrous oxide gas as a propellant G. Or a liquefied gas such as LPG (liquefied natural gas) or DME (dimethyl ether). The aerosol container 2 has a valve 4 at the center of the mountain cup 3, and a stem 5 stands from the valve 4. Further, the tube 6 extends from the valve 4 and reaches the bottom of the aerosol container 2 so that the stock solution A is supplied to the intermittent injection button 10A.

  The intermittent injection button 10 </ b> A is fitted to the stem 5 of the aerosol container 2 at the bottom of the housing 11, and has a bottomed cylindrical cylinder 13 and a communication path 14 that allows the cylinder 13 and the stem 5 to communicate with each other. Have. The communication passage 14 serves as a storage space for the contents when the intermittent injection container 1 for ejecting the contents from the aerosol container 2 is used.

  The cylinder 13 has a hole 15 at the bottom thereof, and a cylindrical first valve 16 and a second valve 17 penetrating the first valve 16 are provided therein. The outer periphery of the first valve 16 is in airtight contact with the inner peripheral surface of the cylinder 13. The second valve 17 includes an inner portion 18 that can seal the cylinder 13 bottom side opening end of the first valve 16, and an outer portion 19 that covers the inner portion 18, and one end of the outer portion 19 is a jet 20. Is forming.

  A cap 21 is fitted on the surface of the housing 11 on the side of the spout 20, and a coil spring-like first urging member 22 and a second valve that urge the first valve 16 toward the bottom side of the cylinder 13 inside the cap 21. A coil spring-like second biasing member 23 that biases 17 toward the bottom side of the cylinder 13 is provided. In the initial state of the intermittent injection button 10 </ b> A, one end of the first valve 16 is abutted against the bottom of the cylinder 13 by the biasing member 22, and the second valve is pressed by the second biasing member 23. 17, one end of the inner portion 18 is abutted against the bottom of the cylinder 13, and in this state, the outer peripheral portion 18 a of the inner portion 18 and the first valve 16 are sealed.

  A space defined by the first valve 16 and the second valve 17 and the cylinder 13 is a pressure chamber 24.

  A pressure adjusting device 30A, which is characteristic of the intermittent injection button 10A, is provided below the communication passage 14 serving as a storage space for contents between the pressure chamber and the stem. The pressure adjusting device 30A includes a piston 31 whose one end is fitted to the stem 5 at the stem fitting portion 12 and the other end faces the communication path 14, and a coil spring-like biasing member 32. The urging member 32 is provided to urge the piston 31 toward the stem 5 when the pressing is released with respect to the state where the intermittent injection button 10A is pressed toward the aerosol container 2 side.

  When the intermittent injection container 1 is used, first, as shown by an arrow P in FIG. 2A, the top of the housing 11 is pressed, the stem 5 is pushed down into the aerosol container 2, and the valve 4 that has been closed by the stem rubber 25 is closed. Open. As a result, the stock solution A filled in the aerosol container 2 takes the communication path 14 and enters the button, and the first valve 16 against the first urging member 22 and the second urging member 23. The second valve 17 slides together in the cylinder 13 and expands the volume of the pressure chamber 24. At this time, in the pressure adjusting device 30A, the urging member 32 is compressed and the volume of the communication passage 14 serving as a storage space is reduced.

  When the pressure of the stock solution A further increases, the second valve 17 hits the cap 21, but the first valve 16 is a convex portion (outer portion) formed on the outer peripheral portion of the outer portion 19 of the second valve 17. The cylinder 13 is further slid until it hits the convex portion 19a). Here, before the second valve 17 hits the cap 21 and in the vicinity of the first valve 16 hitting the outer portion convex portion 19a of the second valve 17, the first valve 16 and Although the second valve 17 is in a sealed state, as shown in FIG. 2B, after the second valve 17 hits the cap 21, a gap is generated in the sealed portion of both valves 16, 17. Even when the first valve 16 is in contact with the outer portion convex portion 19a of the second valve 17, there is a gap between the sealed portions of both the valves 16 and 17, and the valves are open. Therefore, the stock solution A that has accumulated in the pressure chamber 24 and is in a pressurized state is ejected from the ejection port 20.

  When the internal pressure of the pressure chamber 24 decreases due to the ejection, as shown in FIG. 2C, the first urging member 22 and the second urging member 23 start to push back the first valve 16 and the second valve 17, When the internal pressure of the pressure chamber is further reduced by the ejection, the first valve 16 and the second valve 17 are returned to the initial positions as shown in FIG. 2D, the valves are sealed, and the ejection is interrupted.

  When the ejection is interrupted in this way, the inside of the pressure chamber 24 is pressurized by the stock solution A flowing in from the aerosol container 2 as shown in FIG. 2A again, and the stock solution A is ejected from the ejection port 20. Therefore, according to the intermittent injection button 10 </ b> A, intermittent injection in which the stock solution is repeatedly ejected and interrupted is performed while the housing 11 is pressed and the stem 5 is pushed into the aerosol container 2.

  On the other hand, as shown in FIG. 3, when the pressing of the housing 11 is released and the valve 4 is closed, the first valve 16 and the second valve 17 are respectively connected to the first biasing member 22 and the second biasing force. Return to the initial position of the member 23. At this time, the biasing member 32 of the pressure adjusting device 30A also returns to the initial state, so that the storage space increases and the pressure chamber 24 is depressurized. Therefore, the valves 16 and 17 are surely returned to the initial positions and are in a stable sealed state.

  On the other hand, when the pressure adjusting device 30A is not provided, as shown in FIG. 6A, when the valve 4 is closed, the first valve 16 and the second valve 17 cannot return to the initial positions. May stop the eruption. Then, due to factors such as changes in the outside air temperature and external vibration, the sealing between the first valve 16 and the second valve 17 is broken, and post injection occurs as shown in FIG. 6B.

  FIG. 4 is a sectional view of an initial state of the intermittent injection button 10B according to a different aspect of the present invention. The intermittent injection button 10B is provided with a pressure adjusting device 30B in the upper part of the communication passage 14 serving as a storage space for contents between the pressure chamber and the stem. The pressure adjustment device 30B is formed of a press button 33, a piston 34, and an urging member 35 provided on the top of the housing 11. The piston 34 has one end connected to the press button 33 and the other end connected to the communication path. 14 facing. The urging member 35 is provided so as to urge the piston 34 toward the top side of the housing 11 when the pressing of the pressing button 33 toward the aerosol container 2 is released.

  Since the top of the housing 11 serves as a pressing portion for discharging the contents from the aerosol container 2, when the intermittent injection button 10B is pushed down to the aerosol container 2 side when the intermittent injection container is used, the top of the housing 11 is pressed. By pressing the button 33, the stem 4 is pushed down and the piston 34 is pushed into the communication path 14. As a result, the valve 4 is opened in a state where the volume of the communication passage 14 is reduced, the stock solution A flows into the pressure chamber 24 as shown in FIG. 5A, and the stock solution A is ejected from the pressure chamber 24 as shown in FIG. 5B. While the push button 33 is pressed and the stem 5 is pushed into the aerosol container 2, intermittent injection in which the stock solution is repeatedly ejected and interrupted is performed.

  On the other hand, when the pressure of the push button 33 is released and the valve 4 is closed, the piston 34 is returned to the initial state by the urging member 35, the volume of the communication passage is increased, and the pressure chamber 24 is depressurized. Therefore, the valves 16 and 17 are surely returned to the initial positions as in the initial state shown in FIG. 4 and are in a stable sealed state.

  In the intermittent injection button of the present invention, the pressure adjusting device is not limited to the illustrated embodiment, and can be provided by being attached to the pressure chambers of various known intermittent injection buttons.

  The intermittent injection button of the present invention can be used as an aerosol container button that intermittently injects various contents such as a hair restorer and a blood circulation promoter.

It is a fragmentary sectional view of the initial state of the intermittent injection container which attached the button for intermittent injection of one Example to the aerosol container. It is sectional drawing which shows the effect | action of the button for intermittent injections while opening the valve | bulb of an aerosol container. It is sectional drawing which shows the effect | action of the button for intermittent injections while opening the valve | bulb of an aerosol container. It is sectional drawing which shows the effect | action of the button for intermittent injections while opening the valve | bulb of an aerosol container. It is sectional drawing which shows the effect | action of the button for intermittent injections while opening the valve | bulb of an aerosol container. It is sectional drawing of the button for intermittent injection when the valve | bulb of an aerosol container is closed. It is sectional drawing of the initial state of the button for intermittent injection of a different Example. It is sectional drawing which shows the effect | action of the button for intermittent injections while opening the valve | bulb of an aerosol container. It is sectional drawing which shows the effect | action of the button for intermittent injections while opening the valve | bulb of an aerosol container. It is sectional drawing which shows the effect | action of the button for intermittent injection without a pressure regulator. It is sectional drawing which shows the effect | action of the button for intermittent injection without a pressure regulator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intermittent injection container 2 Aerosol container 4 Valve 5 Stem 10A, 10B Intermittent injection button 11 Housing 13 Cylinder 14 Communication path 16 First valve 17 Second valve 18 Inner part 19 Outer part 20 Outlet 21 Cap 22 First Energizing member 23 Second energizing member 24 Pressure chambers 30A, 30B Pressure adjusting device 31 Piston 32 Energizing member 33 Press button 34 Piston 35 Energizing member

Claims (4)

An intermittent injection button mounted on a stem of an aerosol container, the housing being provided in the housing and having a bottomed cylindrical cylinder communicating with the stem, a cylindrical first valve provided in the cylinder, A second valve penetrating into the first valve; the cylinder has a hole in the bottom; the second valve is formed so that one end forms a spout and the other end seals the hole in the bottom of the cylinder; In the cylinder , a pressure chamber is defined by the bottom of the cylinder, the first valve, and the second valve, and the first valve and the second valve repeatedly open and close the pressure chamber according to the internal pressure of the pressure chamber. and, intermittently to the reservoir space of the contents between the pressure chamber and the stem, and a pressure regulator is provided to increase when releasing the pressing the button for intermittent injection against a state of being pressed against the aerosol container side Spray button.   The pressure adjusting device is in a state where one end is fitted to the stem and the other end faces the storage space for the contents between the pressure chamber and the stem, and the intermittent injection button is pressed to the aerosol container side. 2. The intermittent injection button according to claim 1, wherein the intermittent injection button is formed from a biasing member that biases the piston toward the stem when the pressure is released. A pressure button, a pressure button provided on the top of the housing; a piston having one end connected to the pressure button and the other end facing a storage space for contents between the pressure chamber and the stem; and the pressure button 2. The intermittent injection button according to claim 1, wherein the button is formed from a biasing member that biases the piston toward the top side of the housing when the pressure is released toward the aerosol container side.   The intermittent injection container in which the button for intermittent injection in any one of Claims 1-3 is attached to the aerosol container.

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