JP2023132868A - Actuator for liquid discharge and discharge container - Google Patents

Abstract

The present invention relates to a liquid ejection actuator and a liquid ejection container that can almost reliably prevent afterdraw.
A movable nozzle member having a nozzle part having an internal channel for flowing a liquid and a discharge port for discharging the liquid, a stem connecting part extending from a base end of the nozzle part toward a container side, and an internal flow path for discharging the liquid. A back suction mechanism capable of suctioning the liquid in the channel, a base formed with an insertion hole through which the stem connection part of the movable nozzle member can be inserted, and a base that is rotatably connected to the base and is pressed by the user. and a rotating part having a pressing part that receives an operation.
[Selection diagram] Figure 4

Description

The present invention relates to a liquid discharge actuator and a discharge container.

2. Description of the Related Art Conventionally, aerosol containers have been known that can release liquid contained therein by gas pressure. Such an aerosol container has an inner bag containing the liquid to be discharged attached to the inside of a metal container body made of an aluminum plate or a steel plate, and compressed gas is passed between the inner bag and the container body. There are aerosol containers of the type (hereinafter referred to as ``inner bag compression type'') that are filled with a propellant such as or liquefied petroleum gas, and the pressure of this propellant causes the inner bag to contract and discharge the liquid. A type in which the undiluted liquid to be discharged and a propellant such as liquefied petroleum gas such as butane or propane or dimethyl ether are filled, and the undiluted liquid is discharged in the form of foam by the action of the propellant (hereinafter referred to as the "liquefied gas type"). (Patent Document 1).

In addition, in recent years, such aerosol containers have been equipped with a nozzle section that discharges liquid from an outlet at the tip, a handle section that is disposed on the opposite side of the nozzle section from the outlet, and a handle section that is disposed above the handle section. An aerosol-type discharge container is known, in which an actuator is attached, and the liquid in the container body is discharged through a nozzle section when the pressure section is pressed (Patent Document 2). ).

Japanese Patent Application Publication No. 2008-110764 JP 2019-51958 Publication

The inventor has discovered that when using an aerosol container, compared to a pump container that does not use a propellant such as compressed gas, there is a tendency for so-called afterdraw, in which liquid drips from the discharge port of the nozzle after use, to occur. I discovered something. In other words, in an inner bag compression type aerosol container, the propellant passes through the inner bag and dissolves into the liquid, and this dissolved propellant expands in the liquid remaining in the nozzle after ejection, causing the nozzle to discharge. It is thought that dripping (after-draw) is likely to occur from the outlet. Furthermore, in liquefied gas type aerosol containers, it is thought that afterdraw is likely to occur due to expansion of the liquefied gas mixed with the liquid within the nozzle portion.

Since the aerosol type dispensing container of Patent Document 2 has a handle, it is possible to press the pressing part without holding the container body, so the liquid adheres to the container body due to after-draw, making it slippery. Even if it is, the pressing part can be pressed stably. However, since the aerosol type dispensing container of Patent Document 2 does not suppress the occurrence of afterdraw itself, the afterdraw may stain the surrounding area. Therefore, the aerosol type dispensing container of Patent Document 2 has room for improvement in terms of suppressing the occurrence of afterdraw.

The present invention relates to a liquid discharge actuator and a discharge container that can almost certainly prevent afterdraw.

The present invention relates to a liquid ejection actuator that is attached to a container containing a liquid and ejects the liquid contained in the container, the actuator having a nozzle portion having an internal channel for flowing the liquid and a discharge port for ejecting the liquid. , a movable nozzle member having a stem connection portion extending from a base end of the nozzle portion toward the container side, a back suction mechanism capable of sucking liquid in the internal flow path, and the stem of the movable nozzle member. The nozzle portion includes a base formed with an insertion hole through which the connecting portion can be inserted, and a rotating portion rotatably connected to the base and having a pressing portion that receives a pressing operation by a user. is configured to move in a direction approaching the container and discharge the liquid discharged from the container from the discharge port via the internal flow path, and the back suction mechanism a liquid suction chamber that communicates with the internal flow path, at least a portion of the liquid suction chamber being deformed by the movement of the nozzle portion and capable of returning to the state before the movement of the nozzle portion. The elastic part is provided on the container side surface of the nozzle part and is formed of an elastic cup member capable of forming the liquid suction chamber inside, and the rotating part is configured such that when the pressing portion is pressed toward the container, the pressing portion rotates around the connecting portion with the base to move the movable nozzle member toward the container, and the container is The present invention relates to a liquid discharge actuator, which is an aerosol container capable of discharging a liquid contained therein by gas pressure.

The present invention also relates to an aerosol type discharge container comprising the liquid discharge actuator and an aerosol container capable of discharging the liquid contained therein by gas pressure.

The liquid discharge actuator and discharge container according to the present invention can almost certainly prevent afterdraw.

It is a figure showing an aerosol type discharge container concerning this embodiment. It is an exploded view of an aerosol type discharge container. FIG. 2 is a cross-sectional view of an aerosol container. FIG. 2 is an enlarged cross-sectional view of a part of the aerosol type discharge container. FIG. 3 is an enlarged cross-sectional view of a part of the liquid ejection actuator. FIG. 3 is a cross-sectional view showing a state immediately before accepting a user's pressing operation. FIG. 6 is a cross-sectional view showing a state in which the movable nozzle member is pressed down by a pressing operation by a user and liquid is discharged. FIG. 6 is a cross-sectional view showing a state in which the movable nozzle member rises upon release of the user's pressing operation, liquid discharge is stopped, and a back suction function is exerted.

Hereinafter, preferred embodiments for carrying out the present invention will be described using the drawings. Note that the following embodiments do not limit the inventions claimed in each claim, and not all combinations of features described in the embodiments are essential to the solution of the invention. .

[Overall configuration of discharge container according to this embodiment]
First, the discharge container according to this embodiment will be explained using FIGS. 1 to 5. As shown in FIGS. 1 and 2, the dispensing container according to the present embodiment includes an aerosol container 10 capable of discharging the liquid contained therein by gas pressure, and a discharging container 10 that discharges the liquid from the aerosol container 10 by a pressing operation by a user. This is an aerosol-type discharge container 1 that includes a liquid discharge actuator (hereinafter referred to as "actuator 20") that is configured to be able to perform a liquid discharge operation, and a connecting member 30 that connects the aerosol container 10 and the actuator 20.

Note that, in this specification, the direction in which liquid is discharged from the actuator 20 is referred to as "front", and the opposite direction is referred to as "rear". In addition, the direction from the aerosol container 10 toward the actuator 20 will be referred to as "upward," and the opposite direction will be referred to as "downward." However, the vertical direction here is merely a direction determined for convenience of explanation, and is not necessarily the vertical direction in actual usage conditions.

[Aerosol container]
As shown in FIG. 3, the aerosol container 10 includes a container body 100 that contains a liquid, and an aerosol valve 110 disposed at an opening of the container body 100.

[Aerosol container: container body]
The container body 100 includes a bottomed cylindrical outer shell 102, a bottomed cylindrical inner bag 104 provided inside the outer shell 102, and a mountain cup 106 that closes the openings of the outer shell 102 and the inner bag 104. ing. In this specification, the term "bottomed cylindrical shape" refers to a cylindrical shape that has a bottom at one end and an opening at the other end. Furthermore, in this specification, "cylindrical" is not limited to a shape with a circular cross section (cylindrical shape), but also includes a shape with a rectangular cross section (prismatic cylindrical shape).

The inner bag 104 contains a liquid to be discharged. Further, a propellant capable of applying gas pressure to the inner bag 104 is filled between the outer shell part 102 and the inner bag 104. An example of such a propellant is a compressed gas, but the propellant is not limited thereto.

The outer shell part 102 is a can member made of a metal material such as an aluminum plate, and has rigidity that does not deform due to the gas pressure of the propellant. The inner bag 104 has a liquid-impermeable property that cannot allow liquid to pass therethrough, and has flexibility that allows it to be deformed by the gas pressure of the propellant. Examples of the material for the inner bag 104 include, but are not limited to, polyethylene (PE), polypropylene (PP), and ethylene-vinyl alcohol resin (EVOH). Further, the inner bag 104 may be composed of a single layer or a plurality of layers. When the inner bag 104 is composed of multiple layers, it may include a barrier layer capable of preventing oxygen permeation as an intermediate layer, and the barrier layer is made of ethylene-vinyl alcohol resin (EVOH) or the like. It's okay to be.

Note that polyethylene (PE), polypropylene (PP), ethylene-vinyl alcohol resin (EVOH), etc. are materials through which the propellant (compressed gas) can pass, so the propellant dissolves in the liquid in the inner bag 104. This dissolved propellant expands in the liquid remaining in the nozzle portion 222 after ejection, and drips (afterdraw) are likely to occur from the ejection port 223 of the nozzle portion 222. However, the aerosol type ejection according to this embodiment Since the container 1 includes a back suction mechanism 240, which will be described later, it is possible to almost certainly prevent such afterdraw.

The mountain cup 106 forms a closed space for storing liquid in the inner bag 104 by closing the openings of the outer shell 102 and the inner bag 104, and also allows propellant to be stored between the outer shell 102 and the inner bag 104. It is configured to form a closed space for filling. Moreover, the mountain cup 106 has an opening that communicates with the inside of the inner bag 104, and an aerosol valve 110 is arranged so as to close the opening.

In this embodiment, the container main body 100 is composed of an outer shell part 102 and an inner bag 104, and the inner bag 104 is compressed by a propellant (compressed gas) filled between them, and the liquid in the inner bag 104 is discharged. Although a configuration for emitting the light will be described as an example, the present invention is not limited to this. For example, the aerosol container may have a configuration in which a liquid to be discharged (undiluted solution) and a propellant capable of applying gas pressure to the liquid are housed together. In this case, the propellant may include butane, A liquefied gas such as Polopane may also be used. Further, the liquid (undiluted solution) and liquefied gas may be stored in the inner bag 104, or may be stored in the outer shell 102 without providing the inner bag 104. In the case of housing in the inner bag 104, the inner bag 104 may be provided with an intermediate layer such as an aluminum layer (AL layer). In this way, even when liquefied gas is used as the propellant, the propellant expands in the liquid remaining in the nozzle section 222, and drips (afterdraw) are likely to occur from the discharge port 223 of the nozzle section 222. However, since the aerosol type discharge container 1 according to the present embodiment includes the back suction mechanism 240 described below, it is possible to almost certainly prevent such afterdraw.

[Aerosol container: Aerosol valve]
As shown in FIG. 4, the aerosol valve 110 is provided between a housing 111, a stem part 112 inserted into the housing 111, and a bottom part of the housing 111 and a bottom part of the stem part 112. It includes a stem biasing portion 113 that biases in a direction away from the main body 100 (outward direction).

The stem portion 112 is formed into a cylindrical shape having a flow path through which liquid can flow, and has a stem hole 112a in its outer wall that communicates the flow path in the stem portion 112 with the inside of the housing 111. It is formed. The housing 111 is formed into a cylindrical shape with a bottom, and a communication hole 111a that communicates the inside of the housing 11 with the inside of the inner bag 104 is formed at the bottom. Further, the housing 111 is provided with a gasket 114 that airtightly seals the stem hole 112a when the stem portion 112 is urged by the stem urging portion 113 (in an unused state).

The stem biasing section 113 is configured to be compressed when the stem section 112 is pushed into the container body 100 in response to a user's pressing operation on the actuator 20, and to be able to be restored when the pressing operation is released. Examples of the stem biasing portion 113 include, but are not limited to, coil springs.

It is preferable that the stem biasing portion 113 is configured to recover faster than the elastic portion 241 of the actuator 20, which will be described later. Specifically, the stem biasing portion 113 preferably has an elastic modulus that is about 100 times or more and 1000 times or less larger than that of the elastic portion 241 of the actuator 20, and has an elastic modulus that is about 500 times the elastic modulus of the elastic portion 241. It is more preferable to have. As described above, since the elastic modulus of the stem biasing section 113 is larger than the elastic modulus of the elastic section 241 of the actuator 20, it becomes possible to restore the stem biasing section 113 to its original state faster than the elastic section 241 of the actuator 20. Therefore, after the discharge of liquid from the aerosol container 10 into the internal flow path 230 is stopped by the restoration of the stem biasing portion 113, the liquid near the discharge port 223 is drawn into the internal flow path 230 by the restoration of the elastic portion 241. As a result, so-called after-draw, in which liquid drips from the discharge port 223 of the nozzle portion 222 after use, can be almost certainly prevented.

The stem portion 112 is configured to release the liquid within the inner bag 104 when pushed into the container body 100. Specifically, when the stem portion 112 is in a used state in which it is pushed into the container body 100 by the actuator 20 against the urging force of the stem urging portion 113, the stem hole 112a is opened to the inside of the housing 111. A flow path within the stem portion 112 is configured to communicate with the inside of the inner bag 104 via the inside of the housing 111.

In the aerosol container 10 according to the present embodiment, the flow path in the stem portion 112 communicates with the inside of the inner bag 104 in this way, so that the internal pressure of the inner bag 104 is reduced between the outer portion 102 and the inner bag 104. The pressure becomes lower than the pressure of the filled propellant (compressed gas), and the inner bag 104 is compressed by this pressure difference, so that the liquid in the inner bag 104 flows through the inside of the housing 111 and the flow path of the stem portion 112. is configured to be released into the actuator 20.

[Connection member]
The connecting member 30 is a member that connects the aerosol container 10 and the actuator 20, and is formed in a cylindrical shape as shown in FIGS. 2 and 4. Specifically, as shown in FIG. 4, the connecting member 30 has an annular groove 310 at its lower end that can fit into the annular protrusion 106a of the mountain cup 106. By fitting into the annular protrusion 106a, it can be attached to the aerosol container 10. Further, the connecting member 30 has a threaded part 320 on the outer peripheral surface that can be threaded into a threaded part 213 of the actuator 20, which will be described later. By doing so, the actuator 20 is configured to be detachable.

As shown in FIG. 4, the connecting member 30 has a positioning portion 311 on its inner wall that projects radially inward. The positioning portion 311 has a through hole 330 through which a stem connecting portion 226 of the actuator 20 (described later) can be inserted in a state where the aerosol container 10 and the actuator 20 are connected. The through hole 330 is configured to position the stem connecting portion 226 inserted into the through hole 330 at a position aligned with the stem portion 112 (specifically, on the central axis of the stem portion 112).

Further, the connecting member 30 has a skirt portion 340 that covers the connecting portion between the annular groove 310 and the annular protrusion 106a of the mountain cup 106 when the aerosol container 10 and the actuator 20 are connected. Note that the annular groove 310, the threaded portion 320, the positioning portion 311, and the skirt portion 340 may be formed over the entire circumferential area, may be formed intermittently along the circumferential direction, or may be formed intermittently along the circumferential direction. It may be formed only in a part of the direction. Further, the connecting member 30 may be made of metal or synthetic resin.

[Actuator]
The actuator 20 is a server-type dispenser that is attached to the upper part of the aerosol container 10 via a connecting member 30 and is pressed in a direction (downward) toward the aerosol container 10 . Specifically, the actuator 20 includes a base 210 that is attached to the connecting member 30, a handle portion 250 that can be held by the user, a rotating portion 260 that accepts a pressing operation by the user, and a rotating portion 260 that can be held by the user. A movable nozzle member 220 is configured to approach the aerosol container 10 by a pressing operation and discharge liquid from the aerosol container 10, and after the liquid is discharged, liquid drips from a discharge port 223 of a nozzle section 222, which will be described later. It is equipped with a back suction mechanism 240 to prevent falling, so-called after-draw. Note that the actuator 20 may further include a lock pin (not shown) for preventing the content liquid from being discharged against the user's intention in the standby state.

[Actuator: Base]
As shown in FIGS. 2 and 4, the base 210 is formed into a cylindrical shape with an upper surface having an upper surface 211a and a circumferential surface 211b, and the circumferential surface 211b is screwed into the threaded portion 320 of the connecting member 30. It has a double wall structure including an inner wall part 212 having a threadable part 213 and an outer wall part 214 disposed radially outward of the inner wall part 212. The outer wall portion 214 is configured to cover the connecting portion between the connecting member 30 and the inner wall portion 212.

As shown in FIGS. 2 and 4, the upper surface 211a of the base 210 is formed with an insertion hole 215 through which a stem connecting portion 226 (described later) of the movable nozzle member 220 can be inserted. The insertion hole 215 is located on the central axis of the aerosol container 10, and works together with the positioning part 311 of the connecting member 30 to position the stem connecting part 226 of the movable nozzle member 220 at a position (specifically Specifically, it is configured to be positioned on the central axis of the stem portion 112).

Further, as shown in FIG. 2, the upper surface 211a is provided with a width direction guide part 216 and a rear guide part 217 for guiding the vertical movement of the movable nozzle member 220. The width guide portion 216 extends along the vertical direction on both sides of the insertion hole 215 in the width direction, and is a vertical hole ( opening). Further, the rear guide portion 217 extends along the vertical direction to the rear side of the insertion hole 215, and is a vertical hole (opening) along the vertical direction in which a rear plate portion 228 (described later) of the movable nozzle member 220 slides. have. The width direction guide section 216 and the rear guide section 217 cooperate with each other to guide the reciprocating movement of the movable nozzle member 220 along the central axis of the aerosol container 10 (specifically, along the central axis of the stem section 112). is configured to do so.

[Actuator: Handle]
As shown in FIGS. 1 and 2, the handle portion 250 is arranged on the opposite side in the radial direction from the discharge port 223 of the nozzle portion 222. Specifically, as shown in FIG. 4, the handle portion 250 includes a rear extending region 252 extending rearward from the outer peripheral wall on the rear side of the base 210, and a rear extending region 252 that is pressed from an end of the rear extending region 252. It has a downwardly extending area 254 that extends away from the area (pressing part 261) (that is, downwardly), and these rearwardly extending area 252 and downwardly extending area 254 form a finger hook area 256. It is formed. The finger holding area 256 is an area on which the user's fingers (for example, index finger, middle finger, etc.) are expected to be placed. The user can support the aerosol container 10 by gripping the handle portion 250 by placing a finger on the finger grip area 256.

As shown in FIG. 4, the rear extending region 252 allows the rotating portion 260 to be placed above the user's finger when the user's finger (for example, index finger, middle finger, etc.) is hung on the finger hook region 256. It has a length at which a pressing portion 261, which will be described later, is located. Further, the rear extending region 252 is configured to rise as a whole as it becomes farther away from the base 210. As shown in FIGS. 1 and 2, the connecting portion (bent portion) between the rear extending region 252 and the downward extending region 254 has a curved shape that is concave downward, so that the user's fingers and fingers (for example, the thumb) is configured to be appropriately guided. The downwardly extending region 254 has a length that allows one to three fingers (for example, index finger, middle finger, and ring finger) of the user to be hooked thereon.

[Actuator: Rotating part]
As shown in FIGS. 1 and 2, the rotating portion 260 has a pressing portion 261 that receives a pressing operation by a user, and is rotatably connected to the base 210. Specifically, the rotating part 260 has a connecting part 263 with the base 210 at the end on the discharge port 223 side, and a pressing part 261 at the end opposite to the connecting part 263 in the radial direction. have. Further, as shown in FIG. 2, the rotating portion 260 includes a pair of rotation regulating hooks 264 that restrict the rotation range of the rotating portion 260 by engaging with the insertion hole 215 of the base 210, and a movable nozzle. A contact portion 266 that contacts the side plate portion 227 of the member 220 is provided.

The connecting portion 263 between the rotating portion 260 and the base 210 is formed by a pair of flexible thin portions, and the direction toward or away from the base 210 with the thin portions as the center. The rotating part 260 is configured to be able to rotate. Specifically, the connecting portion 263 moves the rotating portion 260 from a state in which the rotating portion 260 is positioned on the movable nozzle member 220 to a direction in which the rotating portion 260 approaches the base 210 with the connecting portion 263 as the center (aerosol container 10 side). ), as shown in FIG. 7, the movable nozzle member 220 can be moved (pushed down) toward the aerosol container 10 between the connecting portion 263 and the pressing portion 261. . In addition, the connecting portion 263 is connected to the movable nozzle member 220 when the movable nozzle member 220 is pushed up by the urging force (restoring force) of the stem urging portion 113 of the aerosol container 10 from the state in which the rotating portion 260 approaches the base 210. As shown in 8, the rotating part 260 is configured to rotate in a direction away from the base 210.

In addition, the connecting portion 263 engages a locking claw of the rotation regulating hook 264, which will be described later, with an edge of the insertion hole 215 of the base 210 from a state where the rotating portion 260 is positioned on the movable nozzle member 220. The movable nozzle member 220 can be exposed as shown in FIG. configured to be possible. Note that the connecting portion 263 is not limited to the configuration of a thin wall portion, and may be any configuration that connects the rotating portion 260 to the base 210 in a rotatable manner, and may be, for example, a hinge mechanism.

The pressing portion 261 is disposed above the handle portion 250 and is a region where the user applies force with his/her fingers (for example, thumb) in order to push the movable nozzle member 220 toward the aerosol container 10 . The pressing portion 261 is located above the connecting portion 263 and is configured to reduce the pressing force necessary for rotating the rotating portion 260.

The pressing portion 261 is formed with a guiding portion 262 that guides the user to press the pressing area. In the illustrated example, the guiding part 262 has a configuration in which three concentric circular arcs are protruded within a recessed part, but the guide part 262 is not limited to this, and may include a recessed part, a raised part, a display part (for example, a character, a symbol, or a pattern). It may be one selected from a pattern forming part, an embossed part, and a rough surface part, or a combination of two or more thereof. Further, the guide section 262 may be configured by attaching another member to the surface of the rotating section 260. It is preferable that the guiding part 262 can also function as a non-slip that prevents the user's fingers from slipping when pressing the pressing part 261.

The top surface of the rotating section 260 on which the pressing section 261 is provided is generally flush with the top surface of the nozzle section 222 of the movable nozzle member 220. That is, when the aerosol type discharge container 1 is viewed from the rear upper perspective, there is no structure that blocks the distance between the user's perspective and the tip of the nozzle portion 222. Therefore, when using the aerosol type discharge container 1, the user can easily grasp the liquid discharge direction by visually checking the tip of the nozzle portion 222.

As shown in FIG. 2, the rotation regulating hook 264 extends toward the base 210 from a position closer to the connecting portion 263 than the contact portion 266. The pair of rotation restriction hooks 264 are arranged apart from each other along the width direction, and locking claws are formed at the tips of each rotation restriction hook 264 so as to face each other. The locking claw of the rotation restriction hook 264 is configured to be able to lock onto the edge of the insertion hole 215 of the base 210. The rotation part 260 is configured to be restricted from rotating in the direction away from the base 210 by engagement with the base 210 .

The contact portion 266 is a portion that comes into contact with the side plate portion 227 of the movable nozzle member 220 when the movable nozzle member 220 is moved toward the aerosol container 10 (pressed down) by the rotating portion 260 . Thereby, the point of contact between the contact portion 266 and the side plate portion 227 of the movable nozzle member 220 becomes the point of action of the force applied to the pressing portion 261. As shown in FIG. 2, the contact portion 266 is formed in an arcuate shape concave in a direction away from the side plate portion 227 of the movable nozzle member 220.

[Actuator: Movable nozzle member]
As shown in FIGS. 2 and 4, the movable nozzle member 220 includes a nozzle portion 222 having a discharge port 223 for discharging liquid, and a stem connecting portion 226 extending from the base end of the nozzle portion 222 toward the aerosol container 10 side. We are prepared. Specifically, the movable nozzle member 220 is formed in an inverted L-shape as a whole, and a vertical portion of the movable nozzle member 220 that extends toward the aerosol container 10 constitutes a stem connecting portion 226. A horizontal portion extending forward from the upper end of the vertical portion constitutes the nozzle portion 222 .

As shown in FIG. 5, the movable nozzle member 220 has an internal channel 230 formed therein, extending from the lower end of the stem connecting portion 226 to the tip of the nozzle portion 222, through which the liquid discharged from the aerosol container 10 flows. A discharge port 223 is formed at the tip of the nozzle portion 222 to discharge the liquid flowing through the internal channel 230 to the outside. The internal channel 230 includes a container-side channel section 231 formed in the stem connection section 226 and a discharge-side channel section 233 formed in the nozzle section 222 . Note that details of the internal flow path 230 will be described later.

These nozzle part 222 and stem connection part 226 move downward (in a direction approaching the aerosol container 10) as a unit by the user's pressing operation, and direct the liquid discharged from the aerosol container 10 through the internal channel 230. It is configured to discharge from the discharge port 223 via the discharge port 223. Further, the nozzle portion 222 and the stem connecting portion 226 are configured to move upward (in a direction away from the aerosol container 10) as a unit when the stem biasing portion 113 is restored when the pressing operation is released.

The nozzle part 222 extends from the upper end of the stem connecting part 226 in the horizontal direction (a direction perpendicular to the extending direction of the stem connecting part 226), and has a discharge side flow path part 233 that causes the liquid to flow, and a discharge side flow path part 233 that causes the liquid to be discharged. It has a discharge port 223. It is preferable that the nozzle portion 222 has a length such that the discharge port 223 is located radially outside the outer peripheral surface of the aerosol container 10 when the actuator 20 is attached to the aerosol container 10 . According to such a configuration, when the aerosol container 10 receives the liquid discharged from the discharge port 223 with the palm of the hand, it is difficult for the aerosol container 10 to interfere with the liquid, and even if afterdraw occurs, the liquid does not reach the aerosol container 10. It has the advantage that adhesion can be suppressed.

The stem connecting portion 226 is formed in a cylindrical shape that extends linearly from the base end side of the nozzle portion 222 downward (toward the aerosol container 10 side), and is connected to the insertion hole 215 of the base 210 and the through hole of the connecting member 30. It has a diameter that allows it to penetrate inside 330. A lower end portion of the stem connecting portion 226 is configured to be able to fit into an upper end portion of the stem portion 112. The stem connecting portion 226 pushes the stem portion 112 of the aerosol container 10 into the housing 111 when the movable nozzle member 220 is pushed toward the aerosol container 10 with the actuator 20 attached to the aerosol container 10. It is configured such that the stem portion 112 can be opened, that is, the liquid in the aerosol container 10 can be discharged from the stem portion 112.

As shown in FIG. 2, the stem connecting portion 226 includes a pair of side plate portions 227 that extend in a direction (sideways) that intersects the extending direction (front) of the nozzle portion 222, and It has a rear plate portion 228 extending in the opposite direction (rearward).

The side plate portions 227 extend along the width direction from both sides of the stem connecting portion 226 in the width direction, and are configured to be slidable along the width direction guide portions 216 of the base 210. Further, the upper end of the side plate portion 227 is in contact with the contact portion 266 of the rotating portion 260, and when the rotating portion 260 is pressed down, the entire movable nozzle member 220 is lowered, and the stem is biased. The rotating portion 260 is configured to be pushed up as the portion 113 is restored.

The rear plate portion 228 is configured to be slidable along the rear guide portion 217 of the base 210, and has a locking pawl 229 that projects rearward at its lower end. The locking pawl 229 locks on the edge of the rear guide portion 217 to allow the movable nozzle member 220 to move relative to the base 210 while restricting the movable nozzle member 220 from coming off from the base 210. It is configured like this.

[Actuator: Internal flow path]
As shown in FIG. 5, the internal flow path 230 includes a container side flow path portion 231 formed in the stem connection portion 226 and a discharge side flow path portion 233 formed in the nozzle portion 222. The container-side flow path section 231 is a hollow section that extends vertically along the moving direction (vertical direction) of the movable nozzle member 220, and its upper end (the end opposite to the end connected to the stem section 112). section) communicates with the discharge side flow path section 233. The discharge side flow path portion 233 is a hollow portion that extends horizontally from the upper end of the container side flow path portion 231 toward the outside in the radial direction, and the discharge port 223 is formed at the tip thereof. That is, the internal flow path 230 is formed in a substantially inverted L shape with a connection port to the stem portion 112 formed at one end and a discharge port 223 formed at the other end.

It is preferable that the volume of the container-side flow path section 231 is set to be smaller than the volumes of the pump chamber and the container-side flow path section in a dispenser with a built-in pump mechanism. From this point of view, the volume of the container-side channel portion 231 is, for example, preferably 100 mm ³ or more, more preferably 150 mm ³ or more, even more preferably 200 mm ³ or more, and 500 mm 3 or more. It is preferably ³ or less, more preferably 300 mm ³ or less, and even more preferably 250 mm ³ or less. By setting the volume of the container side flow path part 231 within the above numerical range, when liquid is sucked by the back suction mechanism 240, the discharge side flow path is given priority over the liquid in the container side flow path part 231. This has the advantage that it becomes possible to suction the liquid in the portion 233, improves the back suction function, and more reliably prevents afterdraw.

In order to realize such a volume, the length of the container-side channel section 231 in its extending direction is preferably 10 mm or more, more preferably 15 mm or more, and preferably 20 mm or more. More preferably, it is 50 mm or less, more preferably 40 mm or less, and even more preferably 30 mm or less. Further, the average cross-sectional area of the container-side channel portion 231 is preferably 5 mm ² or more, more preferably 8 mm ² or more, and preferably 20 mm ² or less, and 15 mm ² or less. It is more preferable that it is, and even more preferably that it is 10 mm ² or less. Here, the "average cross-sectional area" of the container-side flow path section 231 refers to the average value of the cross-sectional area in the region from the lower end of the stem connection section 226 to the upper end (the communication section with the discharge-side flow path section 233). say.

As shown in FIG. 5, the discharge side channel section 233 has a channel cross-sectional area _A2 at a communicating section with the container-side channel section 231. It is preferable that the value be smaller than ₁ . Specifically, the passage cross-sectional area _A2 of the discharge side passage part 233 in the communication part is preferably 50% or less of the passage cross-sectional area _A1 of the container-side passage part 231 in the communication part, and 35 % or less, more preferably 25% or less. By having such a structure, the discharge side flow path section 233 has a flow rate lower than that of the liquid flowing through the container side flow path section 231 when the liquid is sucked by the back suction mechanism 240. It becomes possible to increase the flow rate of the flowing liquid. As a result, the liquid in the discharge side flow path section 233 can be sucked into the nozzle section 222 with priority over the liquid in the container side flow path section 231, which improves the back suction function and reduces afterdraw. This allows for more reliable prevention.

Here, the “communicating portion” refers to a portion where the container side flow path portion 231 and the discharge side flow path portion 233 communicate with each other, and in this embodiment, from the container side flow path portion 231 to the discharge side flow path portion 233. This refers to the bent portion of the internal flow path 230 leading to the point. Furthermore, "the cross-sectional area of the discharge-side flow path in the communication section" refers to the vertical cross-sectional area of the discharge-side flow path in the communication section, that is, the container-side flow path of the discharge-side flow path 233. 231 side end, and "the cross-sectional area of the container-side flow path section in the communication section" refers to the horizontal cross-sectional area of the container-side flow path section 231 in the communication section.

Further, as shown in FIG. 5, in the discharge side flow path section 233, the flow path cross-sectional area _A3 on the discharge port 223 side is similarly smaller than the flow path cross-sectional area _A1 of the container side flow path section 231 in the communication section. It is preferable that there be some, and more preferably, it is smaller than the channel cross-sectional area _A1 of the container-side channel section 231 in the communication section. More specifically, the channel cross-sectional area _A3 at the discharge port 223 is preferably 100% or less, and preferably 70% or less, of the channel cross-sectional area _A1 of the container-side channel section 231 in the communication section. is more preferable, and even more preferably 50% or less.

With such a configuration, it is possible to relatively reduce the amount of liquid stored near the discharge port 223, so that the liquid return distance (inside the internal flow path 230) when the back suction function is activated can be reduced. This makes it possible to increase the suction distance), making it possible to more reliably prevent afterdraw. Here, "flow path cross-sectional area A ₃ at the discharge port" refers to the opening area of the discharge port 223 when the discharge port 223 is an opening that coincides with the vertical direction, and as shown in FIG. When the outlet 223 is an opening inclined with respect to the vertical direction, it refers to the cross-sectional area of the vertical cross section at the portion closest to the outlet 223.

Furthermore, as shown in FIG. 5, the discharge side flow path section 233 preferably has an upward shape in which the discharge port 223 is located above the communication section with the container side flow path section 231. By having such a shape, it becomes possible to cause the liquid in the discharge side flow path section 233 to flow toward the communication section side by its own weight, so that afterdraw can be further prevented.

[Back suction mechanism]
The back suction mechanism 240 is provided on the movable nozzle member 220 and is configured to suck and store the liquid in the internal channel 230 when the user's pressing operation is released. Specifically, as shown in FIGS. 4 and 5, the back suction mechanism 240 is deformed by the movement of the movable nozzle member 220 (nozzle part 222) in response to a user's pressing operation, and when the pressing operation is released. an elastic part 241 that can be restored by the elastic part 241, a liquid suction chamber 243 that can suck and store the liquid in the internal flow path 230, and a suction port 244 that communicates the internal flow path 230 and the liquid suction chamber 243. It is configured to exhibit a back suction effect by varying the volume of the liquid suction chamber 243 in conjunction with the user's pressing operation.

The elastic part 241 is composed of an elastic cup member (suction cup member) having a bottomed cylindrical shape that can be elastically deformed, and is configured to be able to form a liquid suction chamber 243 therein, as shown in FIGS. 4 and 5. . The elastic portion 241 is provided at a position aligned with the suction port 244 on the lower surface of the nozzle portion 222 so as to be located between the lower surface of the nozzle portion 222 and the upper surface 211a of the base 210. The elastic portion 241 has a curved shape (dome shape) that is convex downward in a vertical cross-sectional view along the front-rear direction. The elastic portion 241 is preferably provided at a position close to the stem connecting portion 226, and the centroid position of the elastic portion 241 is located closer to the stem connecting portion 226 than the intermediate position of the entire length of the nozzle portion 222 in the front-rear direction. It is more preferable to do so. By providing the elastic part 241 at a position close to the stem connecting part 226, it becomes possible to efficiently elastically deform the elastic part 241 by an external force applied by the user's pressing operation, so that the elastic part 241 can be efficiently deformed with a small pressing force. It becomes possible to exhibit the back suction effect.

The elastic portion 241 is configured to vary the volume of the liquid suction chamber 243 by elastic deformation as the movable nozzle member 220 descends and restoration (elastic return) as the movable nozzle member 220 rises.

Specifically, when the movable nozzle member 220 moves in a direction (downward) approaching the base 210 by a pressing operation by the user, the elastic part 241 is pressed against the upper surface 211a of the base 210 and By being elastically deformed by the reaction force (pressure) from the upper surface 211a, the internal volume of the liquid suction chamber 243 is reduced, and the liquid (gas at the time of initial use) in the liquid suction chamber 243 is drawn into the internal flow path through the suction port 244. 230. In addition, in FIGS. 4 and 5, in the state before the user's pressing operation (non-discharge state), the elastic portion 241 is not in contact with the upper surface 211a of the base 210 (a gap is formed between the two). However, the present invention is not limited to this, and the elastic portion 241 and the upper surface 211a of the base 210 may be in contact with each other in the non-ejection state.

In addition, when the movable nozzle member 220 moves in the direction (upward) away from the base 210 due to the release of the pressing operation, the elastic part 241 is protected against the reaction force (pressure) from the upper surface 211a of the base 210. By being released and restored to its original shape, the internal volume of the liquid suction chamber 243 is expanded to generate negative pressure within the liquid suction chamber 243, and the liquid in the internal channel 230 is drawn through the suction port 244. The liquid is configured to be sucked into the liquid suction chamber 243.

At this time, it is preferable that the elastic part 241 is configured so that the restoration is completed substantially at the same time as or after the restoration of the stem biasing part 113 is completed. Specifically, it is preferable that the elastic part 241 has a lower elastic modulus than the stem biasing part 113. More specifically, the elastic portion 241 preferably has an elastic modulus that is 0.001 times (0.1%) or more and 0.01 times (1%) or less the elastic modulus of the stem biasing portion 113. It is more preferable that the elastic modulus is approximately 0.05 times (5%) that of the biasing portion 113. With such a configuration, it is possible to restore the elastic part 241 after the restoration of the stem urging part 113 is completed, so that the restoration of the stem urging part 113 causes the flow from the aerosol container 10 into the internal flow path 230. After the discharge of liquid to the nozzle part 222 is stopped, the elastic part 241 is restored to allow the liquid near the discharge port 223 to be drawn into the internal channel 230. As a result, after use, the liquid from the discharge port 223 of the nozzle part 222 It is possible to almost certainly prevent so-called after-draw, in which the liquid drips down.

The elastic portion 241 is made of, for example, elastically deformable synthetic resin such as rubber, elastomer, polyolefin, or silicone resin. As the polyolefin, for example, low density polyethylene (LDPE, LLDPE), ethylene-vinyl alcohol resin (EVOH), etc. can be suitably used, but the polyolefin is not limited thereto. Moreover, the elastic part 241 may be formed separately from the nozzle part 222, or may be formed integrally with the nozzle part 222 by a molding method such as two-color molding.

The liquid suction chamber 243 is a closed space formed inside the elastic part 241, as shown in FIGS. 4 and 5, and communicates with the internal channel 230 via the suction port 244. The amount of variation in the volume of the liquid suction chamber 243 due to the user's pressing operation and its release is such that the liquid near the discharge port 223 is kept inside the liquid suction chamber 243 to the extent that no after-draw occurs from the discharge port 223 of the nozzle section 222. This is the amount that can be absorbed into the body. Specifically, the volume variation of the liquid suction chamber 243 is preferably 100 mm ³ or more, and preferably 150 mm ³ or more, in order for the elastic portion 241 to sufficiently deform and exert the back suction effect. More preferably, it is 200 mm ³ or more. In addition, from the viewpoint of the elastic portion 241 sucking back at a sufficient speed, it is preferably 500 mm ³ or less, more preferably 400 mm ³ or less, and even more preferably 300 mm ³ or less. Here, the "volume variation amount of the liquid suction chamber 243" refers to the volume (maximum volume) of the liquid suction chamber 243 in the normal state before deforming the elastic part 241, and the amount of change in the volume of the movable nozzle member due to the user's pressing operation. 220 is pushed down to the limit and the volume of the liquid suction chamber 243 is in a state where the elastic part 241 is deformed (minimum volume when compressed). This means the volume reduction amount (=the volume expansion amount expanded by the restoration of the elastic portion 241 upon release of the pressing operation), and the volume variation amount becomes the design volume of the back suction function.

The suction port 244 has an opening area large enough to prevent the liquid contained in the liquid suction chamber 243 from leaking into the internal channel 230 due to surface tension or the like. The opening area of the suction port 244 is preferably configured to be smaller than the cross-sectional area of the elastic portion 241. Specifically, the opening area of the suction port 244 is preferably 50% or less, more preferably 30% or less, and even more preferably 20% or less of the cross-sectional area of the elastic portion 241. More specifically, the opening area of the suction port 244 is preferably 10 mm ² or more, more preferably 20 mm ² , and more preferably 30 mm ² from the viewpoint of sufficiently suctioning the liquid in the internal flow path 230 . It is even more preferable that there be. By having such a structure, when the liquid is sucked by the back suction mechanism 240, it is possible to increase the flow velocity of the liquid near the suction port 244 of the back suction mechanism 240, so that the flow rate of the liquid near the suction port 244 of the back suction mechanism 240 can be increased. It becomes possible to increase the suction force and effectively guide the liquid into the liquid suction chamber 243. Moreover, this makes it possible to improve the back suction function and more reliably prevent afterdraw.

The suction port 244 may be directly connected to the discharge side flow path section 233 from the viewpoint of efficiently sucking the liquid on the side of the discharge side flow path section 233 into the liquid suction chamber 243 and effectively prevent afterdraw. Alternatively, it is preferably formed near the communication portion between the container-side flow path portion 231 and the discharge-side flow path portion 233. In the illustrated example, the suction port 244 directly communicates with the discharge side flow path section 233, but the present invention is not limited to this, and the liquid in the internal flow path 230 is sucked into the liquid suction chamber 243 to perform after-draw. As long as it can be prevented, it can be formed anywhere.

[Liquid (liquid content)]
Examples of the liquid (content liquid) contained in the aerosol type discharge container 1 according to the present embodiment include shampoo liquid, rinse liquid, conditioner liquid, cosmetic liquid, medicine, body soap liquid, and liquid detergent for clothes and dishes. Examples include, but are not limited to, liquids such as fabric softeners, bleaches, and the like. The liquid contained in the aerosol type discharge container 1 according to the present embodiment preferably has a viscosity of 500 to 50,000 mPa·s (measured with a B-type viscometer) at 30° C., for example.

[Operation of aerosol type discharge container according to this embodiment]
Next, the operation of the aerosol type discharge container 1 according to this embodiment will be explained using FIGS. 6 to 8. When discharging a liquid using the aerosol type dispensing container 1 according to the present embodiment, first, as shown in FIG. ) and place a part of the finger (for example, the thumb) on the pressing part 261 of the rotating part 260. At this time, since the guiding part 262 is provided on the pressing part 261, the user's fingers are appropriately guided onto the pressing part 261.

Thereafter, with the user's finger placed on the pressing part 261, the user presses down the finger, and the rotating part 260 rotates around the connecting part 263 in a direction approaching the base 210. start. As the rotating part 260 rotates, the abutting part 266 of the rotating part 260 pushes down the movable nozzle member 220 via the side plate part 227. As a result, a pressure exceeding the urging force is applied to the stem urging portion 113, thereby compressing the stem urging portion 113, and as shown in FIG. 7, the stem portion 112 is pushed down by the stem connecting portion 226 of the movable nozzle member 220. .

When the stem portion 112 is pushed down, the stem hole 112a of the stem portion 112 is opened to the inside of the housing 111, and the flow path inside the stem portion 112 communicates with the inside of the inner bag 104 through the inside of the housing 111. As a result, the internal pressure of the inner bag 104 becomes smaller than the pressure of the propellant (compressed gas) filled between the outer shell 102 and the inner bag 104, and the inner bag 104 is compressed by this pressure difference. , the liquid in the inner bag 104 is released into the container-side flow path part 231 of the internal flow path 230 of the movable nozzle member 220 through the inside of the housing 111 and the flow path of the stem part 112, and the liquid in the internal flow path 230 is discharged. It is continuously discharged from the discharge port 223 via the side flow path section 233.

Note that in this liquid discharge state, the elastic portion 241 of the back suction mechanism 240 is pressed against the upper surface 211a of the base 210 and deformed, so that the volume of the liquid suction chamber 243 is reduced compared to the normal state.

Then, after the amount of liquid desired by the user has been discharged, the user releases the pressing operation on the pressing part 261, and the movable nozzle member 220 is separated from the aerosol container 10 and the discharge of the liquid is stopped. At approximately the same time or after this, a back suction effect is exerted in which the liquid near the discharge port 223 is sucked into the liquid suction chamber 243 via the suction port 244.

Specifically, when the pressing force from the user becomes lower than the urging force of the stem urging section 113, as shown in FIG. The stem biasing portion 113 is immediately restored, the stem hole 112a of the stem portion 112 is sealed by the gasket 114, and the discharge of liquid from the aerosol container 10 into the internal channel 230 is stopped. At this time, since the restoring stroke of the stem biasing section 113 is extremely short, the timing at which the user weakens the pressing force and the timing at which the liquid discharge is stopped are almost the same.

Then, as the movable nozzle member 220 is pushed up by the restoring of the stem urging part 113, the elastic part 241 of the back suction mechanism 240 is released from the pressure of the upper surface 211a of the base 210 and restores to its original shape. , the volume of the liquid suction chamber 243 is expanded to the normal volume. As a result, a negative pressure is generated in the liquid suction chamber 243, and the liquid near the discharge port 223 is sucked into the liquid suction chamber 243 through the suction port 244. At this time, the end of the container side flow path section 231 on the stem section 112 side is closed, whereas the discharge port 223 of the discharge side flow path section 233 is open. The liquid in the discharge side flow path section 233 is drawn in with priority over the flow path section 231. As a result, the liquid pool near the discharge port 223 is eliminated or reduced, so that so-called afterdraw, in which liquid drips from the discharge port 223 of the nozzle portion 222 after use, is suppressed.

Further, as the movable nozzle member 220 is pushed up by the restoration of the stem biasing portion 113, the side plate portion 227 of the movable nozzle member 220 pushes up the contact portion 266 of the rotating portion 260, and accordingly, the rotating portion 260 rotates about the connecting portion 263 in a direction away from the base 210 (upward). Thereby, the actuator 20 returns to the standby state.

[Advantages of the liquid discharge actuator and aerosol type discharge container according to the present embodiment]
As described above, the liquid ejection actuator (actuator 20) according to the present embodiment includes a nozzle section 222 having an internal channel 230 for flowing liquid and an ejection port 223 for ejecting liquid, and a nozzle section 222 that receives a pressing operation from a user. The nozzle part 222 includes a pressing part 261 and a back suction mechanism 240 capable of suctioning the liquid in the internal channel 230, and the nozzle part 222 moves in a direction approaching the aerosol container 10 when the pressing part 261 is pressed. The back suction mechanism 240 includes a liquid suction chamber 243 that communicates with the internal flow path 230 of the nozzle section 222. At least a part of the liquid suction chamber 243 is formed of an elastic part 241 that is deformed by the movement of the nozzle part 222 in response to a user's pressing operation and can be restored when the pressing operation is released. The portion 241 is made of an elastic cup member capable of forming a liquid suction chamber 243 inside.

According to the actuator 20 having such a configuration, after the discharge of liquid from the aerosol container 10 into the internal flow path 230 is stopped, the elastic portion 241 is restored to cause the liquid near the discharge port 223 to be drawn into the liquid suction chamber 243. Therefore, it is possible to almost certainly prevent so-called after-draw, in which liquid drips from the discharge port 223 of the nozzle portion 222 after use. Further, according to the actuator 20 according to the present embodiment, by drawing the liquid near the ejection port 223 into the liquid suction chamber 243, solidification of the liquid near the ejection port 223 is suppressed, and clogging of the ejection port 223 is prevented. can do. Furthermore, according to the actuator 20 according to the present embodiment, by providing the liquid suction chamber 243 separately from the internal flow path 230, compared to the case where the elastic portion is directly provided in the internal flow path 230 without providing the liquid suction chamber 243. As a result, it is possible to perform the back suction function without reducing the flow area of the internal flow path 230, that is, without affecting the liquid ejection performance. Further, in the actuator 20 according to the present embodiment, the back suction mechanism 240 can be realized with a simple structure because the elastic portion 241 is formed of an elastic cup member that can form the liquid suction chamber 243 inside.

The liquid discharge actuator (actuator 20 ) according to the present embodiment further includes a handle portion 250 disposed on the opposite side in the radial direction from the discharge port 223 of the nozzle portion 222 , and the pressing portion 261 is located above the handle portion 250 . It is located in According to the actuator 20 having such a configuration, the user can press the pressing part 261 while holding the handle part 250 without holding the aerosol container 10, so that the aerosol container 10 does not get wet. This has the advantage that the pressing portion 261 can be stably pressed even if it is slippery.

Furthermore, in the actuator 20 according to the present embodiment, the elastic part 241 is provided on the surface of the nozzle part 222 on the aerosol container 10 side. Since it becomes possible to efficiently convert the pressing force caused by the pressing operation of the user into the deformation pressure of the elastic portion 241, it becomes possible to discharge the liquid with a light force and to produce a back suction effect.

Further, the actuator 20 according to the present embodiment includes a movable nozzle member 220 having a nozzle portion 222 and a stem connection portion 226 extending from the base end of the nozzle portion 222 toward the aerosol container 10 side, and a stem connection of the movable nozzle member 220. The rotating part 260 includes a base 210 in which an insertion hole 215 through which the part 226 can be inserted is formed, and a rotating part 260 that is rotatably connected to the base 210 and has a pressing part 261. When the pressing portion 261 is pressed toward the aerosol container 10 side, it rotates around the connecting portion 263 with the base 210, and is configured to move the movable nozzle member 220 toward the aerosol container 10. According to the actuator 20 having such a configuration, a simple structure combining the movable nozzle member 220, the base 210, and the rotating part 260 realizes an actuator with a back suction function capable of exhibiting a high back suction effect at a low cost. can do.

Furthermore, in the actuator 20 according to the present embodiment, the rotating part 260 has a connecting part 263 at the end on the discharge port 223 side, and a pressing part 261 at the end on the opposite side of the connecting part 263 in the radial direction. The movable nozzle member 220 is configured to be moved toward the aerosol container 10 between the connecting portion 263 and the pressing portion 261. According to the actuator 20 having such a configuration, the pressing force applied to the pressing part 261 by the user's pressing operation can be efficiently transmitted to the movable nozzle member 220 by the lever principle, so that Furthermore, it becomes possible to produce a back suction effect while ejecting liquid with a lighter force.

Further, in the actuator 20 according to the present embodiment, the internal flow path 230 includes a container side flow path portion 231 formed in the stem connection portion 226 and a discharge side flow path portion 233 formed in the nozzle portion 222. The discharge side flow path portion 233 has a configuration in which a flow path cross-sectional area A ₃ on the discharge port 223 side is smaller than a flow path cross-sectional area A ₁ of the container side flow path portion 231 . According to the actuator 20 having such a configuration, it is possible to relatively reduce the amount of liquid stored in the vicinity of the discharge port 223, so that the liquid return distance (internal flow This makes it possible to increase the distance at which the liquid is sucked into the passage 230, thereby making it possible to more reliably prevent afterdraw.

In addition, the aerosol type discharge container 1 according to the present embodiment includes both the actuator 20 described above and the aerosol container 10 that can discharge the liquid stored therein by gas pressure, so that the aerosol type discharge container 1 can easily cause after-draw. Even with the container 10, afterdraw can be effectively prevented. That is, in the case of an aerosol container that uses a propellant such as compressed gas, such as the aerosol type discharge container 1 according to the present embodiment, the propellant dissolved in the liquid via the inner bag 104 expands within the nozzle portion 222. However, there is a risk that a new problem that does not exist in conventional pump-type containers may arise, such as dripping (after-draw) from the discharge port 223. However, according to the aerosol-type discharge container 1 according to the present embodiment, , it becomes possible to almost certainly prevent such afterdraw. Note that such advantages are the same even when liquefied gas is used as the propellant.

In addition, according to the aerosol type dispensing container 1 according to the present embodiment, the liquid can be continuously discharged until the amount of liquid desired by the user is reached, and the liquid can be repeatedly pressed (accurately by finger pressure) like a pump type container. Since there is no need to repeat the above operations, there is an advantage that operability during continuous discharge is excellent.

[Modified example]
Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the range described in the embodiments described above. Various changes or improvements can be made to each of the above embodiments.

For example, in the embodiment described above, the connection member 30 is provided in order to easily attach the actuator 20 to the aerosol container 10, but the present invention is not limited to this. By forming an annular groove in the base 210 of the actuator 20 that can fit into the portion 106a, the actuator 20 may be directly attached to the aerosol container 10 without intervening the connecting member 30.

Further, in the above-described embodiment, the container containing the liquid is an aerosol container, but the container is not limited to this, and may be a pump container in which the liquid is sucked up and pumped by a pump mechanism.

Further, in the above embodiment, the entire liquid suction chamber 243 is formed by the elastic part 241, but the present invention is not limited to this, and only a part of the liquid suction chamber 243 is formed by the elastic part 241. It may be a configuration.

Furthermore, in the above-described embodiment, the elastic portion 241 of the back suction mechanism 240 is brought into direct contact with the upper surface 211a of the base 210, but the present invention is not limited to this. A structure may also be adopted in which a body or the like is provided and the elastic part 241 is elastically deformed by pressing the elastic part 241 against the pressing body.

Further, in the embodiment described above, the actuator 20 is described as having the handle part 250, but the actuator 20 is not limited to this, and may be configured without the handle part 250.

It is clear from the claims that the above modifications are included within the scope of the present invention.

1: Aerosol type discharge container 10: Aerosol container 11: Housing 20: Actuator (liquid discharge actuator)
30 : Connecting member 100 : Container body 102 : Outer part 104 : Inner bag 106 : Mountain cup 106a : Annular protrusion 110 : Aerosol valve 111 : Housing 111a : Communication hole 112 : Stem part 112a : Stem hole 113 : Stem biasing part 114: Gasket 210: Base 211a: Top surface 211b: Surrounding surface 212: Inner wall portion 213: Screwing portion 214: Outer wall portion 215: Insertion hole 216: Width direction guide portion 217: Rear guide portion 220: Movable nozzle member 222: Nozzle Part 223 : Discharge port 226 : Stem connection part 227 : Side plate part 228 : Rear plate part 229 : Locking claw 230 : Internal flow path 231 : Container side flow path part 233 : Discharge side flow path part 240 : Back suction mechanism 241 : Elastic part 242 : Guiding part 243 : Liquid suction chamber 244 : Suction port 250 : Handle part 252 : Rear extending area 254 : Downward extending area 256 : Finger hook area 260 : Rotating part 261 : Pressing part 262 : Guiding part 263 : Connection part 264 : Rotation regulating hook 266 : Contact part 310 : Annular groove 311 : Positioning part 320 : Screwing part 330 : Through hole 340 : Skirt part

Claims (9)

A liquid ejection actuator that is attached to a container containing a liquid and causes the liquid contained in the container to be ejected,
a movable nozzle member having a nozzle portion having an internal channel for flowing liquid and a discharge port for discharging liquid; and a stem connection portion extending from a base end of the nozzle portion toward the container side;
a back suction mechanism capable of suctioning the liquid in the internal flow path;
a base having an insertion hole through which the stem connecting portion of the movable nozzle member can be inserted;
a rotating part that is rotatably connected to the base and has a pressing part that accepts a pressing operation by a user;
The nozzle part is configured to move in a direction approaching the container and discharge the liquid discharged from the container from the discharge port via the internal flow path,
The back suction mechanism includes a liquid suction chamber communicating with the internal flow path of the nozzle part,
At least a part of the liquid suction chamber is formed by an elastic part that is deformed by the movement of the nozzle part and can be restored when the nozzle part returns to the state before the movement,
The elastic portion is provided on a surface of the nozzle portion facing the container, and is formed of an elastic cup member capable of forming the liquid suction chamber therein,
The rotating portion is configured to rotate around a connecting portion with the base when the pressing portion is pressed toward the container, and move the movable nozzle member toward the container. ,
The container is an aerosol container capable of releasing the liquid contained therein by gas pressure.
Actuator for liquid discharge. The rotating portion has the connecting portion at an end on the discharge port side, and the pressing portion at an end opposite to the connecting portion in the radial direction, and the connecting portion and the pressing portion are connected to each other. The actuator for liquid discharge according to claim 1, wherein the actuator is configured to move the movable nozzle member toward the container between the movable nozzle members. The internal flow path includes a container side flow path portion formed in the stem connection portion and a discharge side flow path portion formed in the nozzle portion,
The actuator for liquid discharge according to claim 1 or 2, wherein the discharge side flow path portion has a flow path cross-sectional area on the discharge port side that is smaller than a flow path cross-sectional area of the container side flow path portion. further comprising a handle portion disposed on a side radially opposite to the discharge port of the nozzle portion,
The liquid ejection actuator according to any one of claims 1 to 3, wherein the pressing portion is arranged above the handle portion. The liquid ejection actuator according to any one of claims 1 to 4,
An aerosol type discharge container comprising: an aerosol container capable of discharging a liquid contained therein by gas pressure. The aerosol container includes a container body that stores a liquid, a stem portion that releases the liquid when pushed into the container body, and a stem bias that biases the stem portion in a direction away from the container body. Equipped with a
The stem biasing section is configured to be compressed when the stem section is pushed into the container main body due to a pressing operation by a user, and to be able to be restored when the pressing operation is released. Aerosol type dispensing container. The aerosol container includes an outer shell and an inner bag provided within the outer shell,
The aerosol type dispensing container according to claim 5 or 6, wherein a liquid is contained in the inner bag, and a propellant that can apply gas pressure between the outer shell and the inner bag is filled. The aerosol type discharge container according to claim 7, wherein the inner bag is made of a material through which nitrogen molecules in the compressed gas can pass. The aerosol type discharge container according to any one of claims 5 to 8, wherein the aerosol container contains a liquid and a propellant capable of applying gas pressure to the liquid.

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