JP2015137139A - Injection port clogging prevention mechanism and aerosol type product having injection port clogging prevention mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve efficient inhibition and reduction of the generation of after-draw by actively outflowing a residual content at an injection port of an aerosol type product and in its vicinity through the injection port to an exterior space area by the action of a propellant gas phase component.SOLUTION: A propellant gas phase valve (housing hole parts 3a, 4a and a movable valve member 5) for directly taking a propellant gas phase component of a container body in a housing 3 is provided. At a stage when a stem 1 moves upward and returns to a stationary mode position at the end of a content release operation, an inflow valve 3f to the housing 3 is closed, the propellant gas phase valve and an outflow valve 1a from the stem 1 are opened, and thereby the timing of the propellant gas phase component outflowing toward an injection port along a flow passage C is ensured. The movable valve member 5 held in an upper annular top face 1e in an operation mode moves downward with the stem 1 in a state of contacting with an outward lower annular step part 1f at the time of transition to a stationary mode, and thereby the timing in which the propellant gas phase valve and the outflow valve are opened is shortened as much as possible.

Description

  When the operation mode setting operation for injecting the content of the aerosol type product is finished, the present invention removes the content remaining in the content injection port or the nearby passage portion from the propellant gas phase component inside the container body. It is related with the injection port clogging prevention mechanism etc. which were made to flow out to an external space area by the effect | action of.

  In particular, in a housing in which a stem having an outflow valve element (stem hole) that is opened by an operation mode setting operation is disposed, an inflow valve element (housing lower inner peripheral surface) with the stem and a movable valve that interlocks with the stem A propellant gas phase valve element (housing hole) with a member is provided.

And the position and shape relationship of each of the inflow valve, outflow valve and propellant gas phase valve,
(11) In static mode, the inflow and outflow valves are closed and the propellant gas phase valve is opened,
(12) When shifting from the stationary mode to the operating mode, the outflow valve is opened after the propellant gas phase valve is substantially closed while the inflow valve is closed,
(13) In the operation mode, both the outflow valve and the inflow valve are opened while the propellant gas phase valve is closed,
(14) When returning from the operation mode to the stationary mode, the inflow valve is closed, the propellant gas phase valve is opened, and then the outflow valve is closed.
It is set as follows.

  The point here is the order of the opening and closing changes of the propellant gas phase valve and the outflow valve in the above (12) and (14).

  That is, when shifting from the stationary mode to the operation mode, the timing when both the propellant gas phase valve and the outflow valve are opened is avoided as much as possible, and the propellant gas phase inside the container body is prevented from leaking to the external space. ing.

  On the contrary, when returning from the operation mode to the stationary mode, the propellant gas phase valve and the outflow valve are both opened while the inflow valve is closed, and the propellant gas phase of the container body is secured. The minute is surely sent to the content outlet.

  In order to ensure the order of this opening / closing change, as will be described later, the relative positional relationship between the stem hole portion as the inflow valve element and the movable valve member as the propellant gas phase valve element is changed to the operation mode. Switching at the time of switching to and returning to the stationary mode.

  In other words, the illustrated vertical distance between the stem hole and the movable valve member is set longer in the first half of the transition to the stationary mode and the operation mode (see FIGS. 1 and 2), and the operation mode and the return to the stationary mode are set. The first half is set short (see FIGS. 4 and 5).

  By the operation of this injection port clogging prevention mechanism, it is possible to prevent or sufficiently reduce the occurrence of after-draw in aerosol type products.

  In this specification, the injection port side of the operation unit is described as “front” and “front”, and the opposite side is described as “rear” as necessary. That is, the left side of FIGS. 1 to 6 is “front” and the right side is “rear”.

  In addition, the moving direction of the stem during the content discharge operation is defined as “vertical direction” and “vertical direction”. The side of the illustrated operation unit in the vertical direction is referred to as “upper”, and the side of the illustrated tube in the same vertical direction is referred to as “lower”.

  As a countermeasure for after-draw of aerosol-type products, the applicant of the present invention will remove residual contents such as the content injection port from the inside of the container body by the action of the gas phase of the propellant at the end of the operation mode setting operation. It is proposed to flow out into the area (see Patent Document 1 described later).

  This is because a separate storage space area in which the propellant gas phase component from the inside of the container body is accommodated in the operation mode is prepared, and the storage is performed by returning the operation unit to the stationary mode position upon completion of the operation mode setting operation. The propellant gas phase component in the space is automatically supplied to the injection port.

JP 2012-125695 A

  The proposed mechanism for preventing clogging of the injection port is based on the idea that the aerosol type product injection port and the residual content in the vicinity of the aerosol type product will actively flow out of the injection port to the external space due to the action of the gas phase of the propellant. Based on this, it has a predetermined after-draw countermeasure effect.

  Instead of providing a storage space area for the propellant gas phase, the present invention closes the inflow valve to the housing at the stage where the stem returns to the stationary mode position at the end of the content discharge operation, and the propellant gas phase The timing when both the valve and the outflow valve from the stem are opened is ensured.

  During this timing, the propellant gas phase inside the container body flows out toward the injection port via the housing and stem via the propellant gas phase valve and the outflow valve which are both open.

  That is, a propellant gas phase valve (housing hole and movable valve member) for directly taking the propellant gas phase content of the container body into a normal housing is provided. This is based on a new viewpoint of setting the propellant gas phase valve to an open state.

  Accordingly, an object of the present invention is to enrich the after-draw countermeasure technology for aerosol products and to effectively prevent and reduce the after-draw generation.

The present invention solves the above problems as follows.
(1) During the operation mode setting operation of the aerosol type product, the residual contents of the injection port (for example, the injection port 2a described later) and the passage portion nearby are released to the external space area by the action of the propellant gas phase. In the injection port clogging prevention mechanism,
A content passage area (for example, a content passage area 1b described later) communicating with the injection port, a stem hole portion (for example, a stem hole portion 1a described later) as an outflow valve element, and a lower outer peripheral surface (for example, an inflow valve element) A stem (for example, a stem 1 described later) having a small diameter cylindrical portion 1m and a large diameter cylindrical portion 1n described later;
In the operation mode, an internal space that communicates with the stem hole, a lower inner peripheral surface (for example, an inflow valve annular portion 3f described later) as the inflow valve element, and a housing hole (for example, described later) as a propellant gas phase valve element Housing body hole portion 3a, bush hole portion 4a) (for example, housing body 3, bush 4 described later),
A movable valve member (for example, a movable valve member 5 to be described later) that operates as a propellant gas-phase valve element to the housing hole portion in conjunction with the stem while being guided in the inner peripheral surface of the housing. And having
The stem is
It is formed in an outer peripheral surface portion between the stem hole portion and the lower outer peripheral surface, and a movable range of the movable valve member (for example, between an upper annular top surface 1e described later and an outward lower annular step portion 1f). Vertical range) and the movable valve member is held at the lower position of the moving range when the stem is in the stationary mode position, and the movable valve member is moved when the stem is in the operating mode position. A moving range setting portion (for example, an upper annular top surface 1e, an outward lower annular step portion 1f, an upper annular tapered surface 1g, and a lower annular tapered surface 1h, which will be described later) held at the upper side of the range;
The housing is
Stopper portions (for example, an upper vertical rib portion 4b and an annular upright portion 3c described later) that are respectively formed above and below the housing hole and set the movable valve member at the uppermost position and the lowermost position thereof. Prepared,
The movable valve member is
A held portion (for example, an inwardly facing annular stepped portion 5c, an annular inclined surface 5d, a lower annular top surface 5e, a hanging inner peripheral surface portion 5f, which will be described later) that is selectively held at the lower position and the upper position,
The stem and the movable valve member are
When returning from the operation mode set to the open state of each of the inflow valve and the outflow valve and the closed state of the propellant gas phase valve to the stationary mode of the opposite open / close state,
The movable valve member and the stem in the form of holding the held portion in the upper position are:
First, the inflow valve is closed, and the outflow valve and the propellant gas phase valve are both opened to change the propellant gas phase inside the container body (for example, a storage space area A described later). Flow into the injection port,
Subsequently, the movable valve member stops at the stopper portion (for example, the upper longitudinal rib portion 4b described later), and then only the stem further moves in the return direction to the stationary mode, and the held portion is moved to the lower portion. Set to the stationary mode held in the side position,
The thing of a structure aspect is used.
(2) In (1) above,
When transitioning from the stationary mode to the operating mode,
The movable valve member and the stem in the form of holding the held portion in the lower position are:
First, the propellant gas phase valve is closed to prevent the propellant gas phase inside the container body from flowing into the stem hole and the injection port from the housing hole,
Subsequently, the movable valve member stops at the stopper portion (for example, an annular upright portion 3c described later), and then only the stem further moves in the direction of transition to the operation mode, and the held portion is moved to the upper position. Set to the retained operating mode state,
The thing of a structure aspect is used.
(3) In the above (1) and (2),
The movement range setting unit
When the stem moves between the lower position and the upper position with respect to the held portion, an annular tapered surface (for example, an upper annular taper described later) that exhibits a relative elastic deformation guiding action with the held portion. Surface 1g, lower annular tapered surface 1h),
The thing of a structure aspect is used.
(4) In the above (1), (2), (3),
The stem is
A passage portion (for example, a vertical groove portion 1k described later) that allows the contents to be released and the propellant gas phase component to pass from the upstream side to the downstream side of the movable valve member is formed in a part of the moving range setting portion. Was
The thing of a structure aspect is used.
(5) In the above (1), (2), (3), (4),
The housing is
A lower inner peripheral surface (for example, an inflow valve annular portion 3f described later) as the inflow valve element, an outer hole (for example, a housing main body hole 3a described later) as the housing hole, and the movable valve member A housing body (for example, a housing body 3 to be described later) having an annular standing portion (for example, an annular standing portion 3c to be described later) as a stopper portion set at the lower position;
The movable valve member is attached to the inside of the housing main body so as to contact and guide the inner hole portion (for example, a bush hole portion 4a described later) as the housing hole portion, and the movable valve member is at the uppermost position. A cylindrical portion (for example, a bush 4 described later) provided with an annular convex portion (for example, an upper vertical rib-shaped portion 4b described later) as a stopper portion to be set,
The thing of a structure aspect is used.
(6) In (5) above,
The cylindrical part is
Held in a circumferential concave portion (for example, a circumferential concave portion 3b described later) outside the annular upright portion,
The thing of a structure aspect is used.

  The injection port clogging prevention mechanism having such a configuration and an aerosol type product provided with the injection port clogging prevention mechanism are objects of the present invention.

The present invention is based on the above problem solving means.
(21) We will enrich technology related to after-draw measures for aerosol products,
(22) Ensure prevention of after-draw
be able to.

The stationary mode of the content clogging prevention mechanism for the injection port, that is, the inflow and outflow valves for the housing are closed, the propellant gas phase valve is opened, and the movable valve member of the propellant gas phase valve component is lowered with respect to the stem. It is explanatory drawing which shows the state hold | maintained at the side position. The first half of the time when the operation unit of FIG. 1 is pushed down to shift to the operation mode, that is, the propellant gas phase valve is closed, the outflow valve is not changed at least completely, the inflow valve is closed, and the movable valve member It is explanatory drawing which shows the state which interlock | cooperates below with a stem, hold | maintaining at a lower position. FIG. 2 shows the latter half of the transition to the operation mode, that is, a state where the propellant gas phase valve is closed, the outflow valve and the inflow valve are opened, the movable valve member is stopped at the housing, and only the stem is further moved down. It is explanatory drawing. Operation mode following FIG. 3, that is, as in the latter half of FIG. 3, the propellant gas phase valve is closed, the outflow valve and the inflow valve are opened, the stem is also stopped, and the movable valve member is held in the upper position with respect to the stem. It is explanatory drawing which shows the state made. The first half of returning to the stationary mode by releasing the push-down operation, that is, the timing when the inflow valve is closed and both the propellant gas phase valve and the outflow valve are opened (= the propellant gas phase in the container body is the propellant gas phase) FIG. 6 is an explanatory diagram showing a state in which the flow path C leading to the injection port via the valve and the outflow valve is set, and the movable valve member is interlocked upward with the stem while being held at the upper position. FIG. 5 shows the latter half of the transition to the stationary mode, that is, a state where the propellant gas phase valve is opened, the outflow valve and the inflow valve are closed, the movable valve member is stopped at the housing, and only the stem is further moved up. It is explanatory drawing.

  Embodiments of the present invention will be described with reference to FIGS.

  The components with reference numbers with alphabets (for example, the stem hole portion 1a) used in FIGS. 1 to 6 indicate that they are part of the components (for example, the stem 1) of the numeral portions with the reference numbers in principle.

1 to 6,
A is a well-known space for the propellant gas phase inside the container body,
B is a content flow path in the operation mode of the content injection state when the injection content of the container body is discharged from the inside of the housing through the outflow valve (stem hole) and the injection port to the external space area (FIG. 4). reference),
When C returns from the operation mode to the stationary mode, the propellant gas phase in the accommodation space A is injected through both the open propellant gas phase valve (housing hole) and the outflow valve (stem hole). Propellant gas phase flow path when moving to the mouth (see Fig. 5),
D is the stem moving direction when the stem shifts from the stationary mode position to the operating mode position in accordance with the content discharge operation to the operation unit of the user (see FIGS. 2 and 3),
E is the direction of movement of the stem when the stem is returned from the previous operation mode position to the upper stationary mode position by the elastic action of the coil spring by releasing the contents discharge operation (see FIGS. 5 and 6),
Respectively.

Also,
1 is a sheath-like stem that exhibits an outflow valve action in conjunction with the content injection operation, and has an internal passage area for passage of the content;
1a is a stem hole portion formed on the upper peripheral surface portion of the stem and constituting an outflow valve with a stem gasket 6 to be described later,
1b is a content passage area communicating with each of the stem hole portion 1a and the later-described injection port 2a (see FIGS. 3 and 4),
1c is formed on the lower peripheral surface portion of the stem hole portion 1a and is an outwardly upward annular step portion that comes into contact with the lower surface portion of the inner end side of the stem gasket 6 described later in the stationary mode of FIG.
1d is a ring-shaped convex portion that follows directly below the annular portion 1c that faces upward,
1e is a so-called portion that is combined with the lower surface of the ring-shaped convex portion 1d, and an upper annular top surface (see FIGS. 4 and 5) for setting the uppermost position (see FIGS. 4 and 5) of the movable valve member 5 described later with respect to the stem. Moving range setting section),
1f is formed on the lower peripheral surface portion of the upper annular top surface 1e, and is an outward lower annular stage for setting a lowermost position (see FIGS. 1 and 2) of a movable valve member 5 described later with respect to the stem. Part (movement range setting part),
1g is formed in the vertical intermediate peripheral surface portion between the upper annular top surface 1e and the outward lower annular step portion 1f, and holds a movable valve member 5 described later in contact with the upper annular top surface, And, the upper annular taper surface (moving range setting part) that has an upward gentle gradient that exhibits a guide action when the movable valve member is forcibly driven in the vertical direction with respect to the stem,
1h is formed continuously immediately below the upper annular tapered surface 1g to hold a movable valve member 5 described later in contact with the outwardly facing lower annular step portion 1f, and the movable valve member is in contact with the stem. The lower annular taper surface (moving range setting part) with a steep downward slope that exhibits a guide action when forcedly driven in the vertical direction
1j is an upper annular receiving portion that is formed in an annular ceiling surface form on the lower peripheral surface portion of the outward lower annular step portion 1f, and holds the upper end side of a coil spring 7 to be described later.
1k is formed on the circumferential surface portion between the lower portion of the ring-shaped convex portion 1d and the upper annular receiving portion 1j in the circumferential direction. In the operation mode of FIG. A vertical groove-like portion that passes through the flow of B and through which the propellant gas phase component from the propellant gas phase valve passes in the flow of C during the return from the operation mode of FIG. And propellant gas phase passage part),
1 m is a small-diameter cylindrical portion formed on the lower end side of the stem and exhibiting an inflow valve action (lower outer peripheral surface as an inflow valve element),
1n is a large-diameter cylindrical portion (lower outer peripheral surface as an inflow valve element) that is formed immediately below the small-diameter cylindrical portion 1m and exhibits an inflow valve action,
Respectively.

Also,
2 is an operation unit which is attached to the downstream side of the stem 1 and is a target for the content discharge operation from the stationary mode of FIG. 1 to the operation mode of FIG.
2a is a discharge port for discharging contents (see FIGS. 3 and 4) formed at the distal end portion of the operation section.
Respectively.

Also,
3 is a cylindrical housing body (housing) that accommodates the lower portion of the stem 1 and through which the contents to be injected from the container body pass through the internal space.
3a is a housing body hole portion (housing hole portion, outer hole portion) that is formed in the peripheral surface portion of the housing body and constitutes a propellant gas phase valve with the movable valve member 5 described later,
3b is a circumferential concave portion formed on the inner peripheral surface portion of the housing body below the housing main body hole portion 3a to engage and hold the lower end side portion of the movable valve member 5 described later,
3c is an annular upright portion (stopper portion) that also serves as an inner wall portion of the circumferential concave portion 3b and demarcates the lowest position of the movable valve member 5 described later,
3d is a lower vertical rib-shaped portion formed in a plurality at the lower end portion of the inner peripheral surface of the housing body, and through which the contents pass through the vertical space area sandwiched between them.
3e is a lower annular receiving portion which is formed in an inward stepped portion at the lower end portion of the lower vertical rib-shaped portion 3d and holds the lower end side of a coil spring 7 which will be described later.
3f is formed on the inner peripheral surface portion of the housing body below the lower annular receiving portion 3e, and exhibits an inflow valve action between the small-diameter cylindrical portion 1m and the large-diameter cylindrical portion 1n of the stem 1. Inflow valve annulus (lower inner peripheral surface as inflow valve element),
Respectively.

Also,
4 is a cylindrical bush (housing, cylindrical shape) whose lower end portion is guided and held by the circumferential concave portion 3b and is fitted to the upper inner peripheral surface of the housing main body 3. Part),
4a is a bush hole portion (housing hole portion, inner hole portion) located at a portion facing the housing main body hole portion 3a in a state where the bush is attached to the housing main body 3.
4b is formed in plural on the inner peripheral surface portion on the upper end side of the bush, and an upper vertical rib-shaped portion (stopper portion, ring-shaped convex portion) that demarcates the uppermost position of the movable valve member 5 described later on each lower surface portion,
Respectively.

Also,
5 is arranged in an annular space region between the stem 1 and the bush 4 and can be moved up and down to cooperate with the housing body hole 3a and the bush hole 4a to exert a valve action on the propellant gas phase inside the container body. Movable valve member,
5a is in close contact with the inner peripheral surface of the bush 4 and has a sealing action. When the movable valve member is at the uppermost position, the upper end portion of the movable valve member is in contact with and held on the lower surface portion of the upper vertical rib-shaped portion 4b. Reverse skirt,
5b is in close contact with the inner peripheral surface of the bush 4 in the same manner as the reverse skirt-shaped portion 5a and exhibits a sealing action. When the movable valve member is at the lowest position, its lower end is engaged and held by the annular upright portion 3c. Side skirt,
5c is formed on the inner peripheral surface of the movable valve member, and is engaged and held by the upper annular top surface 1e of the stem 1 in the first half of the return to the operation mode of FIG. 3 and the rest mode of FIG. Inward annular step (held part),
5d is formed in a continuous manner downward from the inner end portion of the inwardly-circular annular step 5c, and is below the stem 1 during the first half of the transition to the stationary mode of FIG. 1 and from there to the operation mode of FIG. An annular inclined surface (held portion) that is inwardly inclined to abut against the annular tapered surface 1h,
5e is formed on the inner peripheral surface of the movable valve member below the annular inclined surface 5d, and the stem 1 has an outward downward annular shape in the first half of the transition to the stationary mode of FIG. 1 and the operation mode of FIG. A lower annular top surface (held portion) to be engaged and held with the step portion 1f,
5f is a suspended inner peripheral surface portion (held portion) continuously formed between the lower end portion of the annular inclined surface 5d and the inner end portion of the lower annular top surface 5e.
Respectively.

Also,
6 is a stem gasket which is disposed in contact with the outer peripheral surface of the stem 1 and constitutes an outflow valve with the stem hole 1a.
7 is a coil spring disposed between the upper annular receiving portion 1j of the stem 1 and the lower annular receiving portion 3e of the housing body 3, and biases the stem upward to set the stationary mode position.
8 is a mounting cap in which the housing main body 3 is engaged and held, the stem gasket 6 is sandwiched between the upper end portion of the housing main body 3 and attached to the opening of a well-known container main body (not shown) by a tightening manner;
9 is a tube for passing the contents attached to the lower cylindrical portion of the housing body 3;
Respectively.

  Here, the stem 1, the housing body 3, the bush 4, the movable valve member 5 and the tube 9 are made of plastic made of polypropylene, polyethylene, polyacetal, nylon, polybutylene terephthalate or the like.

  The operation unit 2 is made of plastic and metal, the stem gasket 6 is made of rubber, the mounting cap 8 is made of metal, and the coil spring 7 is made of metal and plastic. is there.

  In the illustrated injection port clogging prevention mechanism, the inflow valve is constituted by a small diameter cylindrical portion 1m, a large diameter cylindrical portion 1n of the stem 1, and an inflow valve annular portion 3f of the housing body 3. The outflow valve is constituted by a stem hole 1a and a stem gasket 6, and the propellant gas phase valve is constituted by a housing body hole 3a, a bush hole 4a and a movable valve member 5.

  Basic features of the illustrated injection port clogging prevention mechanism are as follows (31) to (36).

(31) In the still mode of Fig. 1,
The stem 1 and the movable valve member 5 are in their uppermost positions,
The portions of the annular inclined surface 5d and the lower annular top surface 5e of the movable valve member 5 are engaged with the lower annular tapered surface 1h and the outward lower annular step 1f of the stem 1,
Both the inflow valve and the outflow valve for the internal space region of the housing body 3 are closed, and the propellant gas phase valve is opened.

(32) In the first half of the transition to the operation mode of FIG.
The stem 1 and the movable valve member 5 are integrally moved downward while being held in FIG.
During this downward movement, the outflow valve begins to open after the propellant gas phase valve is substantially closed.
The inflow valve remains closed.

(33) In the latter half of the transition to the operation mode in FIG.
The movable valve member 5 hits the upper end portion of the annular upright portion 3c of the housing body 3 and stops.
Even after the movable valve member stops, the stem 1 moves downward while being relatively elastically deformed in such a manner that the lower annular tapered surface 1h and the upper annular tapered surface 1g ride on the hanging inner peripheral surface portion 5f of the movable valve member 5,
The inflow valve begins to open while the propellant gas phase valve is closed, and the discharge operation of the contents to be injected into the external space of the container body begins.

(34) In the operation mode of FIG.
The stem 1 and the movable valve member 5 are in the lowest position,
The inward annular step 5c and the lower annular top surface 5e of the movable valve member 5 are engaged with the upper annular top surface 1e and the upper annular tapered surface 1g of the stem 1,
While the propellant gas phase valve is closed, both the inflow valve and the outflow valve for the internal space region of the housing body 3 are set to be open,
The injection target contents of the container body are discharged from the injection port 2a to the external space region through the opened inflow valve and outflow valve.

(35) In the first half of the return to the stationary mode in FIG.
The stem 1 and the movable valve member 5 are moved upward together in the holding state of FIG.
During this upward movement, it is ensured that the inflow valve is closed and the propellant gas phase valve and the outflow valve are both open,
The propellant gas phase in the container body flows to the jet port 2a through the propellant gas phase valve and the outflow valve in the open state, and the residual content at the jet port and its periphery flows out to the external space area. Let

(36) In the latter half of the return to the stationary mode in FIG.
The movable valve member 5 hits the lower end portion of the upper vertical rib portion 4b of the bush 4 and stops.
Even after the movable valve member is stopped, the stem 1 moves upward while relatively elastically deforming so that the upper annular tapered surface 1g rides on the suspended inner peripheral surface portion 5f of the movable valve member 5, etc.
Eventually, the stem 1 returns to the stationary mode positional relationship of FIG.

  As described above, the position of the movable valve member 5 in the vertical direction (stem movement direction) with respect to the stem 1 is different between the stationary mode of FIG. 1 and the operation mode of FIG.

  That is, when the movable valve member 5 is in the stationary mode, it contacts the outwardly facing lower annular step 1f of the stem 1, and in the operation mode, the upper annular top surface 1e closer to the stem hole 1a than the lower annular step. Abut.

  In other words, the vertical interval between the stem hole 1a and the movable valve member 5 is set to be long in the stationary mode and short in the operation mode.

  In the stationary mode, the stem hole 1a is set at a position above the stem gasket 6, and the movable valve member 5 is set at a position above the bush hole 4a and the housing body hole 3a.

With these settings,
(41) When the operation unit 2 in the stationary mode shown in FIG. 1 is pressed downward, as shown in FIG. 2, first, the bush hole 4a is closed with the inflow valve and the outflow valve substantially closed as before. And the housing body hole 3a is shut off by the movable valve member 5, that is, the propellant gas phase valve is shifted to the closed state,
(42) On the contrary, when the user's pressing operation is released and the operation mode of FIG. 4 returns to the stationary mode of FIG. 1, as shown in FIG. The propellant gas phase valve shifts to the open state with the valve still open as before,
It will be.

  Due to the preferential closing state shift of the propellant gas phase valve with respect to the opening / closing change of the outflow valve in (41) above, the propellant gas phase component of the container body is inadvertently released from the injection port 2a to the external space area. It is blocking as much as possible.

  In addition, the injection of the container body immediately after the pressing operation for releasing the contents to the operation unit 2 is released by the preferential closing state shift of the propellant gas phase valve with respect to the opening / closing change of the outflow valve of (42). The gas phase component is sent to the injection port through the propellant gas phase valve and the outflow valve in the open state.

  Due to the jetting action of the propellant gas phase sent to the jetting port, the jetting port and the residual contents in the vicinity thereof are released to the external space region, and the plugging of the jetting port is remarkably improved.

  As described above, since the stem 1 is biased upward by the elastic force of the coil spring 7, the stem 1 moves downward while resisting the elastic force in accordance with the pressing operation for releasing the contents, and by releasing the pressing operation. Move up.

The stem 1 is set to its uppermost position in the stationary mode of FIG.
This is because the outward lower annular step portion 1f of the stem 1 is engaged with the lower annular top surface 5e of the movable valve member 5 held by the upper longitudinal rib portion 4b of the bush 4 fitted to the housing body 3. Because.

  When the injection port clogging prevention mechanism of FIG. 1 is in the stationary mode, both the inflow valve and the outflow valve are closed and the propellant gas phase valve is open. At this time, the contents of the container body are of course not discharged to the external space.

  In the first half of the transition to the operation mode of FIG. 2 following FIG. 1, the inflow valve remains closed, the outflow valve opens slightly, and the propellant gas phase valve shifts to a substantially closed state.

  Here, the propellant gas phase valve shifts to the closed state because the reverse skirt-like portion 5a and the skirt-like portion 5b of the movable valve member 5 straddle the bush hole portion 4a and seal the bushing inner peripheral surface. It is because it presents. By this sealing action, the bush hole 4a and the housing body hole 3a are shut off from the housing internal space. Also at this time, the contents of the container body are not released to the external space.

  In the latter half of the transition to the operation mode of FIG. 3 following FIG. 2, both the inflow valve and the outflow valve are shifted to the open state, and the propellant gas phase valve remains closed. At this time, the contents of the container body begin to be released to the external space through the inflow valve and the outflow valve.

  Here, the reason why the inflow valve is shifted to the open state is that the opposing counterpart of the inflow valve annular portion 3f of the housing body 3 is changed from the large-diameter cylindrical portion 1n to the small-diameter cylindrical portion 1m.

  The reason why the outflow valve shifts to the open state is that the stem hole 1a moves to a position below the stem gasket 6.

  The discharge path of the contents in FIG. 3 is: “Inner space area of the container body—Tube 9—Inlet valve—Inner lower space area of the housing body 3—Vertical groove portion 1k—Inner upper space area of the housing body 3 / bush 4— Stem hole portion 1a-content passage area 1b-injection port 2a ".

  In the operating mode of FIG. 4 following FIG. 3, both the inflow and outflow valves are fully open and the propellant gas phase valve remains closed. At this time, the contents of the container main body are discharged to the external space area in the flow path B through the inflow valve and the outflow valve. The route itself is the same as in FIG.

  In the first half of the return to the stationary mode of FIG. 5 following FIG. 4, the inflow valve shifts to the closed state, the outflow valve remains open, and the propellant gas phase valve shifts to the open state.

  Here, the reason why the inflow valve is shifted to the closed state is that the opposing counterpart of the inflow valve annular portion 3f of the housing body 3 is changed from the small diameter cylindrical portion 1m to the large diameter cylindrical portion 1n.

  The reason why the propellant gas phase valve shifts to the open state is that the lower skirt-like portion 5b of the movable valve member 5 has moved to a position above the bush hole portion 4a.

  In the first half of the return to the stationary mode, the propellant gas phase component in the storage space area A in the container body passes through the propellant gas phase valve and the outflow valve, both of which are in the open state. It is supplied to the injection port 2a by the flow path C of "part 1a-content passage area 1b".

  As a result of the action of the propellant gas phase valve that has flowed into the injection port 2a, the injection port and the residual content in the vicinity thereof are discharged into the external space as described above.

  In the latter half of the return to the stationary mode of FIG. 6 following FIG. 5, the inflow valve remains closed, the outflow valve shifts to the closed state, and the propellant gas phase valve remains open. That is, the open / close state of each valve is the same as that in the stationary mode of FIG. At this time, the contents of the container body are of course not discharged to the external space.

  Here, the reason why the outflow valve shifts to the closed state is that the stem hole portion 1a moves to the position of the stem gasket 6 or more.

Of course, the present invention is not limited to the above-described embodiments.
(51) A push-down rotation type operation unit is used instead of the illustrated operation unit.
(52) The housing body 3 and the bush 4 are made as a single member.
(53) Form the injection target contents and the propellant passage portion (vertical groove portion 1k) formed between the upstream side and the downstream side of the movable valve member 5 in the movable valve member.
(54) As the relative positional relationship between the inflow valve and the propellant gas phase valve in the first half of the transition to the operation mode in FIG. 2, the inflow valve is slightly changed when the propellant gas phase valve has not completely shifted to the closed state. Including situations like
(55) Reversing the shape relationship between the concave portion between each component of the illustrated injection port clogging prevention mechanism and the corresponding convex portion,
You may do it.

  Aerosol products to which the present invention is applied include cleaning agents, cleaning agents, antiperspirants, cooling agents, muscle anti-inflammatory agents, hair styling agents, hair treatment agents, hair dyes, hair restorers, cosmetics, shaving foams, foods , Droplets (such as vitamins), pharmaceuticals, quasi drugs, paints, gardening agents, repellents (insecticides), cleaners, deodorants, laundry glue, urethane foam, fire extinguishers, adhesives, lubrication There are various uses such as agents.

  As the contents stored in the container body, various forms such as liquid, cream and gel are used. Ingredients blended in the contents are, for example, powders, oil ingredients, alcohols, surfactants, polymer compounds, active ingredients according to each application, water, and the like.

  As the powder, metal salt powder, inorganic powder, resin powder, or the like is used. For example, talc, kaolin, aluminum hydroxychloride (aluminum salt), calcium alginate, gold powder, silver powder, mica, carbonate, barium sulfate, cellulose, and a mixture thereof are used.

  As the oil component, silicone oil, palm oil, eucalyptus oil, camellia oil, olive oil, jojoba oil, paraffin oil, myristic acid, palmitic acid, stearic acid, linoleic acid, linolenic acid and the like are used.

  Examples of the alcohol include monovalent lower alcohols such as ethanol, monovalent higher alcohols such as lauryl alcohol, and polyhydric alcohols such as ethylene glycol, glycerin, and 1,3-butylene glycol.

  Surfactants include anionic surfactants such as sodium lauryl sulfate, nonionic surfactants such as polyoxyethylene oleyl ether, amphoteric surfactants such as lauryldimethylaminoacetic acid betaine, and cations such as alkyltrimethylammonium chloride. A surfactant is used.

  As the polymer compound, hydroxyethyl cellulose, methyl cellulose, gelatin, starch, casein, xanthan gum, carboxyvinyl polymer, or the like is used.

  Active ingredients according to each application include anti-inflammatory analgesics such as methyl salicylate and indomethacin, antibacterial agents such as sodium benzoate and cresol, insect repellents such as pyrethroid and diethyltoluamide, and zinc paraphenolsulfonate. Sweats, camphor, menthol and other refreshing agents, ephedrine, adrenaline and other anti-asthma drugs, sucralose, aspartame and other sweeteners, epoxy resins, urethane and other adhesives and paints, paraphenylenediamine, aminophenol and other dyes, Use oxidizing agents such as hydrogen oxide water, fire extinguishing agents such as ammonium dihydrogen phosphate, sodium hydrogen carbonate, and potassium.

  Further, other than the above-mentioned contents, suspending agents, ultraviolet absorbers, emulsifiers, humectants, antioxidants, sequestering agents, etc. can be used.

  As gas for injecting contents in aerosol type products, compressed gas such as carbon dioxide, nitrogen gas, compressed air, oxygen gas, rare gas, and mixed gas thereof, and liquefied gas such as liquefied petroleum gas, dimethyl ether, and fluorocarbon are used. .

1: Sheath-like stem 1a: Stem hole portion 1b: Content passage area 1c: Outwardly upward annular step portion 1d: Ring convex portion 1e: Upper annular top surface 1f: Outward downward annular step portion 1g: Upper annular taper Surface 1h: Lower annular tapered surface 1j: Upper annular receiving portion 1k: Vertical groove-shaped portion 1m: Small diameter cylindrical portion 1n: Large diameter cylindrical portion

2: Operation unit 2a: injection port (see FIGS. 3 and 4)
3: Housing main body 3a: Housing main body hole 3b: Circumferential concave portion 3c: Annular standing portion 3d: Lower vertical rib-shaped portion 3e: Lower annular receiving portion 3f: Inlet valve annular portion

4: Cylindrical bush 4a: Bush hole 4b: Upper vertical rib 5: Movable valve member 5a: Reverse skirt 5b: Skirt 5c: Inward annular step 5d: Annular inclined surface 5e: Lower annular Top surface 5f: hanging inner peripheral surface

6: Stem gasket 7: Coil spring 8: Mounting cap 9: Tube

Claims (7)

In the operation mode setting operation of the aerosol type product, in the injection port clogging prevention mechanism that discharges the residual contents of the injection port and the passage part nearby to the external space area by the action of the gas phase of the propellant,
A stem having a content passage area communicating with the injection port, a stem hole as an outflow valve element, and a lower outer peripheral surface as an inflow valve element;
A housing provided with an internal space that communicates with the stem hole when in operation mode, a lower inner peripheral surface as the inflow valve element, and a housing hole as a propellant gas phase valve element;
A movable valve member that operates as a propellant gas phase valve element to the housing hole portion in conjunction with the stem while being arranged in the inner space region and guided to the inner peripheral surface of the housing,
The stem is
The movable valve member is formed in an outer peripheral surface portion between the stem hole portion and the lower outer peripheral surface to set a moving range of the movable valve member, and the movable valve member is moved when the stem is in a stationary mode position. A movement range setting unit that holds the movable valve member at the upper position of the movement range when the stem is in the operation mode position is held at the lower position of the range,
The housing is
It is formed respectively above and below the housing hole, and includes a stopper portion that sets the movable valve member at its uppermost position and lowermost position,
The movable valve member is
A held portion that is selectively held at the lower position and the upper position;
The stem and the movable valve member are
When returning from the operation mode set to the open state of each of the inflow valve and the outflow valve and the closed state of the propellant gas phase valve to the stationary mode of the opposite open / close state,
The movable valve member and the stem in the form of holding the held portion in the upper position are:
First, the inflow valve is closed, and the outflow valve and the propellant gas phase valve are both opened, and the propellant gas phase inside the container body is caused to flow into the injection port.
Subsequently, the movable valve member stops at the stopper portion, and then only the stem further moves in the return direction to the stationary mode, so that the held portion is held in the lower position. Set,
An injection port clogging prevention mechanism characterized by that. When transitioning from the stationary mode to the operating mode,
The movable valve member and the stem in the form of holding the held portion in the lower position are:
First, the propellant gas phase valve is closed to prevent the propellant gas phase inside the container body from flowing into the stem hole and the injection port from the housing hole,
Subsequently, the movable valve member stops at the stopper portion, and then only the stem further moves in the direction of transition to the operation mode, and the held portion is set in the operation mode state held at the upper position. To be
The injection port clogging prevention mechanism according to claim 1. The movement range setting unit
When the stem moves between the lower position and the upper position with respect to the held portion, the stem includes an annular tapered surface that exhibits a relative elastic deformation guide action with respect to the held portion.
The injection port clogging prevention mechanism according to claim 1 or 2. The stem is
A part of the movement range setting part is formed with a passage part through which the contents to be released and the propellant gas phase component pass from the upstream side to the downstream side of the movable valve member.
The injection port clogging prevention mechanism according to any one of claims 1 to 3. The housing is
A housing body including a lower inner peripheral surface as the inflow valve element, an outer hole as the housing hole, and an annular upright portion as a stopper for setting the movable valve member at the lowest position;
The movable valve member is attached to the inside of the housing body in such a manner that the movable valve member is in contact with and guided, and an inner hole as the housing hole and a ring as a stopper for setting the movable valve member at the uppermost position. It consists of a cylindrical part with a convex part,
The injection port clogging prevention mechanism according to any one of claims 1 to 4. The cylindrical part is
It is held in the circumferential concave portion outside the annular upright portion,
The injection port clogging prevention mechanism according to claim 5. The injection port clogging prevention mechanism according to any one of claims 1 to 6, comprising a propellant and contents.
Aerosol type product characterized by that.

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