JP6172741B2 - Pump mechanism for discharging contents and pump-type product equipped with the pump mechanism for discharging contents - Google Patents

Description

  The present invention relates to the contents of the storage space area between the upstream valve and the downstream rubber valve by the opening and closing action of the lower upstream valve and the upper downstream rubber valve disposed in the cylinder integral with the container body. The present invention relates to a pumping mechanism for discharging contents.

In particular, for example, the present invention relates to a content discharge pump mechanism having the following features.
(11) A rubber that is formed by an accumulator type rubber valve with a specific shape, etc., which will be described later, along with the deformation of the upright cylindrical part (piston contact part) inside the downstream rubber valve during the push-down operation. The shape change of each of the upper reverse skirt portion and the lower skirt portion (seal acting portion with the cylinder inner peripheral surface) outside the valve is suppressed. In other words, it is possible to stabilize the sealing action between the pressure accumulation type downstream rubber valve and the inner circumferential surface of the cylinder that guides it.
(12) The actual capacity of the storage space area is reduced by providing a space adjustment operation section in the storage space area, and the piston integrated with the operation button returns to its stationary mode position after the push-down operation for releasing the contents. When the pressure reduction ratio of the storage space area is increased, the content suction force from the inside of the container body (the storage space area to the upstream valve) to the storage space area is increased.
(13) The ball valve as the upstream valve is elastically urged toward the content inflow portion which is the operation partner, thereby reliably closing the content inflow portion other than during the content inflow operation.

  The object of application of the present invention is an airless specification content discharge pump mechanism having a movable bottom plate and an external air inflow specification content discharge pump having a suction pipe to a storage space area (to a storage space area). Mechanism.

  However, in the following description, for convenience of explanation, an airless specification content discharge pump mechanism is assumed as necessary.

  The contents to be applied include, for example, liquid or cream soap, shampoo, rinse, cosmetics, milky lotion, foaming shaving foam, hair styling foam, and the like as described later.

  The applicant of the present application has already proposed an airless content discharge pump mechanism having the features (12) and (13) (see Patent Document 1).

  This pump mechanism for releasing the contents increases the suction force of the contents to the storage space area from the upstream ball valve to the pressure accumulation type downstream rubber valve during the return operation to the stationary mode, and the upstream ball valve is operated. There is an advantage that the contents inflow portion into the storage space is surely closed except during the operation by elastically energizing toward the other party.

International Publication No. 2007/116457

  The conventional contents discharge pump mechanism has the above-mentioned advantages.

  However, the related shape between the inner cylindrical part of the pressure accumulation type downstream rubber valve (inner cylindrical part + outer sealing action part) and the piston with which it abuts is essentially In addition to being deformed not only in the vertical direction (the axial direction of the upright cylindrical portion), it can also be displaced and deformed in the direction of turning to the left and right with respect to the axial direction.

  For this reason, in the conventional content discharge pump mechanism, the sealing action portions (the upper reverse skirt portion and the lower skirt portion) that are in close contact with the inner peripheral surface of the cylinder housing the piston and the like are also displaced in this rotational direction. .

  Due to this displacement, the state of close contact between the reverse skirt portion and the skirt portion of the pressure accumulation type downstream rubber valve and the cylinder inner peripheral surface changes during the transition from the stationary mode to the content discharge operation and vice versa. There was room for improvement in that the possibilities could not be dismissed.

In the present invention, in order to cope with this room for improvement, as a pressure accumulation type downstream rubber valve composed of an inner cylindrical portion and an outer sealing action portion (upper reverse skirt portion and lower skirt portion) continuous thereto. ,
The cylindrical part is
An upright cylindrical portion that contacts the outer peripheral surface of the piston,
And the inner and outer peripheral surface portions are sandwiched between the pistons, and are configured to include at least a sandwiched portion on the upper end side that does not deform even during the content discharge operation, and a deforming action portion that follows the sandwiched portion.
A pressure accumulation type rubber valve is used.

  That is, by using a pressure accumulation type downstream rubber valve (in the above-mentioned storage space area) provided with a clamped portion on the upper end side and a deforming action portion on the lower side, a transition from a stationary mode to a content discharge operation, or To prevent the deformation of the sealing action part (reverse skirt part, skirt part) of the downstream rubber valve during the reverse transition and stabilize the sealing state between the sealing action part and the cylinder inner peripheral surface Objective.

  In addition, a space adjusting operation part for reducing the volume is provided inside the storage space area, and the storage space when the piston integrated with the operation button returns to the stationary mode position after the push operation for discharging the contents is performed. The purpose is to further increase the content suction force based on the cooperative action with the stabilization of the sealing state.

  The significance of the content suction force enhancement is particularly significant in the airless specification (operation) content discharge pump mechanism.

  It has a movable bottom plate that moves upward (in a direction to reduce the volume of the storage space area up to the upstream valve) in contact with the inner peripheral surface of the container body, and originally the storage space area via the upstream valve This is because a large content suction force from the storage space to the storage space is required.

  In addition, the ball valve used as the upstream valve is elastically biased toward the content inflow portion which is the working partner, and the content inflow portion is reliably shifted in a state other than during the content inflow operation. The purpose is to plan.

The present invention solves these problems as follows.
(1) An upstream valve (for example, an upstream ball valve 6 described later) disposed in a cylinder (for example, a cylinder 5 described later) attached to a container body (for example, a container body 9 described later), and a piston ( For example, a storage space region formed between a pressure accumulation type downstream rubber valve (for example, a later-described downstream rubber valve 4) disposed inside the cylinder in a form that exhibits a valve action on the lower piston 3) described later. For example, in the contents discharge pump mechanism in which the contents of the storage space area B) to be described later are discharged to the external space based on the opening / closing action of the upstream valve and the downstream rubber valve accompanying the movement of the piston,
The downstream rubber valve is
An upright cylindrical portion (for example, an upright cylindrical portion 4a described later) in which the entire vertical portion of the inner peripheral surface is in contact with an outer peripheral surface of the piston (for example, a lower piston 3 described later);
A sealing action part (for example, a reverse skirt part 4f and a skirt part 4g described later) formed on the outside of the upright cylindrical part and exhibiting a sealing action with the inner peripheral surface of the cylinder,
The upright cylindrical part is
A clamped portion (for example, clamped portion 4b described later) which is an upper end side portion of which the inner and outer peripheral surface portions are clamped by the piston and is not deformed even during the content discharge operation;
It has at least a deformation action part (for example, a deformation action part 4c described later) following the sandwiched part,
The thing of a structure aspect is used.
(2) In (1) above,
The upright cylindrical part is
It has a continuous base (for example, a continuous base 4d described later) that is continuously formed under the deformation acting part and serves as a starting part of the sealing action part,
The sealing action part is
A reverse skirt portion (for example, a reverse skirt portion 4f described later) extending outward and upward from the continuous base;
A skirt portion (for example, a skirt portion 4g described later) extending outward and downward from the continuous base portion,
The thing of a structure aspect is used.
( 3 ) In (1) and (2) above,
The storage space area is
It has a space adjustment action part (for example, a columnar member 7 described later) for reducing the capacity,
The thing of a structure aspect is used.
( 4 ) In the above (1), (2), (3),
The cylinder is
A movable bottom plate (for example, a movable bottom plate 9e described later) for airless operation;
A bottom lid (for example, a below-described bottom lid 9b) in which holes (for example, a later-described hole 9c) for inflow of air into the movable bottom plate are formed.
The thing of a structure aspect is used.

  The object of the present invention is a pump mechanism for releasing contents such as an airless specification and an outside air inflow specification to the accommodation space area having such a configuration, and a pump-type product including the contents discharging pump mechanism.

The present invention provides the above problem solving means.
(21) Sealing between the sealing action part (reverse skirt part and skirt part) of the downstream rubber valve in the storage space area and the cylinder inner peripheral surface during the transition from the stationary mode to the contents discharge operation and vice versa Stabilize the state,
(22) Further content suction force based on the cooperative action of the pressure reduction ratio increase accompanying the volume reduction of the storage space area corresponding to the conventional space adjustment operation part and the stabilization of the sealing state of (21) above Strengthen,
(23) By elastically energizing the ball valve used as the upstream valve of the storage space area toward the contents inflow part which is the working partner, the ball valve is reliably closed except during the contents inflow operation. As a result, the operation of the pumping mechanism for discharging the contents can be further improved in accuracy.

  In addition, the effect of the above (22) is remarkable in the airless specification content discharge pump mechanism that requires a large content suction force from the storage space area inside the container body to the storage space area as described above. I can say that.

It is explanatory drawing which shows the cross section of the whole pump type product in stationary mode. It is explanatory drawing which expands and shows the storage space area etc. from the upstream ball valve inside a cylinder of FIG. 1 to a downstream rubber valve. Explanatory drawing which shows the content discharge | release initial state which the content of the said storage space area flows out to the passage area (external space area) of a piston by the downstream rubber valve of a storage space area opening based on pushing operation of an operation button It is. It is explanatory drawing which shows the content discharge | release final state of the aspect in which the operation button was further pushed down rather than FIG. 3, and the skirt part lower end surface of the downstream rubber valve contact | abutted to the step part of the cylinder internal peripheral surface. It is explanatory drawing which shows the content sucking-up state to the storage space area when pressing operation of an operation button is cancelled | released and it returns to the stationary mode of FIG. 1 from the content discharge state until then. It is explanatory drawing which shows the perspective view of the columnar member provided with the capacity | capacitance reduction function of the storage space area inside a cylinder, and the holding | suppressing function of an upstream ball valve.

  The form for implementing this invention is demonstrated using FIG. 1 thru | or FIG.

  As described above, the content discharge pump mechanism of the present invention includes an airless pump mechanism including a movable bottom plate for defining a storage space area inside the container body, and a suction pipe to the storage space area (accommodation). It is intended for any pump mechanism that is designed to allow the outside air to flow into the space.

  In this embodiment, for convenience of explanation, an airless specification content discharge pump mechanism is assumed.

  The components with reference numerals with the following alphabets (for example, the passage portion 1a) are in principle shown to be part of the components with the reference numbers without the alphabet (for example, the operation buttons 1).

1 to 6,
1 is a well-known operation button that can be moved up and down with a push-down type.
1a is a passage portion of contents formed on the operation button,
1b is an output hole for discharging the contents following the passage 1a,
Respectively.

Also,
2 is a cylindrical upper piston (stem) fitted to the lower end portion of the passage portion 1a of the operation button 1;
2a is an annular convex portion that is formed in the circumferential direction of the inner peripheral surface of the upper piston and receives the upper end portion of the lower piston 3 described later;
2b is a passage area of the contents formed on the upper downstream side of the annular convex portion 2a,
2c is a lower cylindrical portion for fitting a lower piston formed on the lower upstream side of the annular convex portion 2a,
2d is formed in an outwardly expanding manner in the lower end opening area of the lower cylindrical portion 2c, and is covered with an upright cylindrical portion 4a of the downstream rubber valve 4 described later between the outer peripheral surface of the lower piston 3 described later. A large-diameter annular portion on the lower end side for holding the sandwiching portion 4b in a fixed state,
2e is a ceiling step formed on the upper end side of the lower end side large-diameter annular portion 2d;
Respectively.

Also,
3 is a lower piston (stem) fitted to a small diameter portion (a portion other than the lower end large diameter annular portion 2d) of the lower cylindrical portion 2c of the upper piston 2.
3a constitutes an upper portion of the lower piston, a solid upright rod-like portion in which an upright cylindrical portion 4a of a downstream rubber valve 4 described later is attached to a lower outer peripheral surface not to be fitted with the upper piston 2,
3b is a hollow barrel-shaped portion with a lower end side opening extending downward from the upright rod-shaped portion 3a,
3c is formed in the vertical direction of the outer peripheral surface of the upright rod-shaped portion 3a and the radial direction of the upper end portion, respectively, and is formed in the annular convex portion 2a (inside space region thereof) and the passage region 2b immediately above the concave portion of the upper end surface of the lower piston. A plurality of longitudinal groove-shaped portions for communicating contents,
3d is a so-called boundary portion between the upright rod-like portion 3a and the barrel-like portion 3b below it, and an annular step portion (valve seat) that exhibits a valve action between the annular lower end surface 4e of the downstream rubber valve 4 described later,
3e is an annular convex portion that is formed on the lower portion of the outer peripheral surface of the barrel portion 3b and receives the upper end portion of a coil spring 8 to be described later.
3f is an outer peripheral surface portion between the annular step portion 3d and the annular convex portion 3e, and is set in a state of being opposed to a skirt portion 4g of the downstream rubber valve 4 described later when the operation button 1 is in the stationary mode position. Annular upper outer peripheral surface,
Respectively.

Also,
4 is a cylindrical pressure accumulation type downstream rubber valve which is attached to the upper piston 2 and the lower piston 3 and exhibits a valve action with the annular step portion 3d of the lower piston,
The upper end portion of 4a is sandwiched between the lower end side large-diameter annular portion 2d of the upper piston 2 and the upright rod-like portion 3a of the lower piston 3, and the entire inner peripheral surface is held on the outer peripheral surface of the upright rod-like portion. Upright cylindrical part
4b is an upper end side portion of the upright cylindrical portion 4a, which is sandwiched and fixed between the lower end side large-diameter annular portion 2d of the upper piston 2 and the outer peripheral surface of the upright rod-like portion 3a, so that the operation button 1 is pushed down. Pinched parts that do not deform at the time of release or when
4c is an inner side portion of the upright cylindrical portion 4a, and a deforming action portion that can be expanded and contracted in the vertical direction in a form in which the sandwiched portion 4b and a continuous base portion 4d described later are discarded from the upright cylindrical portion,
4d is a lower end side portion of the upright cylindrical portion 4a, and is a continuous base portion connected to an inverted skirt portion 4f and a skirt portion 4g described later,
4e is a lower end surface portion of the upright cylindrical portion 4a, and an annular lower end surface (valve element) that exhibits a valve action with the annular step portion 3d of the lower piston 3;
4f is a reverse skirt portion which is continuously formed outward from the annular lower end surface 4e and exhibits a sealing action between the inner peripheral surface of the cylinder 5;
4g is a skirt portion that is continuously formed outward and downward from the annular lower end surface 4e to provide a sealing action between the inner peripheral surface of the cylinder 5;
Respectively.

Also,
5 is a cylinder (housing) that houses a lower piston 3, a downstream rubber valve 4, an upstream ball valve 6, a columnar member 7 and the like described later,
5a is a lower opening through which the contents of the accommodating space A flows when the operation button 1 is pushed back to the stationary mode position.
5b is an upper part of the peripheral surface of the lower opening 5a, and an annular tapered surface (valve seat) that becomes wider toward the upper side,
5c is a lower annular step portion following the annular tapered surface 5b,
5d is formed above the lower annular step portion 5c, and sets the lower movement limit in a so-called manner such as when the operation button 1 is inadvertently pressed by the contact action with the annular convex portion 3e of the lower piston 3. Annular step,
5e is formed above the middle annular step portion 5d, and in the initial use of the pump mechanism, that is, in the storage space area B, the contents to be discharged from the storage space area A have not yet flowed in and air has been stored. An upper annular step portion for forcibly displacing the downstream rubber valve to an open state by an abutting action with the lower end surface of the skirt portion 4g of the downstream rubber valve 4 in accordance with the pressing operation of the operation button 1 in the state;
5f is a large-diameter inner peripheral surface portion continuing from the upper side of the upper annular step portion 5e,
5g is an annular flange portion extending outward from the upper end of the large-diameter inner peripheral surface portion 5f,
Respectively.

Also,
6 is an upstream ball valve that exhibits a valve action between the annular tapered surface 5b of the cylinder 5;
7 is a columnar member (space adjusting action portion) having a capacity reducing function of the storage space area B described later and a pressing function of the upstream ball valve 6;
7a is a small-diameter solid or hollow cylindrical part having the capacity reduction function described above,
7b is a concave portion for passing the contents formed in the vertical direction of the outer peripheral surface of the cylindrical portion 7a,
7c is the bottom surface of the cylindrical portion 7a,
7d is a cylindrical portion having the above-mentioned upstream ball valve presser function and capacity reducing function at a large diameter portion continuing below the cylindrical portion 7a;
7e is an upper surface of the cylindrical portion 7d, and a stepped portion having a C-shaped planar shape in which the range following the concave portion 7b is missing,
7f is three longitudinal grooves for passage of contents formed at equal intervals in the circumferential direction of the cylindrical portion 7d,
7g is an elastic piece portion for holding the upstream ball valve formed in a manner protruding from the longitudinal groove portion 7f to the center of the cylindrical portion,
7h is an inner peripheral surface between the longitudinal grooves 7f,
7j is a circumferential surface opening formed in the circumferential direction of the cylindrical portion 7d in a mode that follows the concave portion 7b, consisting of a lower end portion having the same height as the upper surface of the elastic piece portion 7g,
8 is a coil spring provided between the ring-shaped convex portion 3e of the lower piston 3 and the step portion 7e of the columnar member 7 for urging the lower piston and the upper piston 2 upward.
Respectively.

Also,
9 is the container body containing the contents,
9a is an opening-side cylindrical portion in which a screw portion is formed on the outer peripheral surface;
9b is a sheath-like bottom lid fitted to the outer peripheral surface of the container body trunk,
9c is an air inflow hole formed in the bottom portion of the bottom lid 9b,
9d is an inner annular upright portion formed on the bottom portion of the bottom lid 9b,
9e is a movable bottom plate that moves upward in response to a decrease in content (pressure drop) in the storage space area A described later,
9f is a movable bottom plate reverse skirt portion that is formed on the movable bottom plate 9e and whose upper end portion is in close contact with the inner peripheral surface of the container main body.
9g is a movable bottom plate skirt portion formed on the movable bottom plate 9e, the lower end portion of which is in close contact with the inner peripheral surface of the container main body,
9h is a bottom step portion for contacting the inner annular upright portion 9d to specify the lowest position of the movable bottom plate 9e,
Respectively.

Also,
10 is a screw cap formed with a screw portion on the inner peripheral surface and screw-engaged with the opening-side cylindrical portion 9a of the container body 9.
10a is a central cylindrical part for guiding the upper piston 2,
10b is an annular packing sandwiched between the annular flange portion 5g of the cylinder 5 and the opening-side cylindrical portion 9a (the end surface portion) of the container body 9,
Respectively.

Also,
A is a storage space area for contents inside the container body (internal space from the movable bottom plate 9e to the upstream ball valve 6),
B is a storage space area for contents inside the cylinder (internal space from the upstream ball valve 6 to the downstream rubber valve 4),
Respectively.

  Here, the operation button 1, the upper piston 2, the lower piston 3, the cylinder 5, the columnar member 7, the container main body 9, the screw cap 10, and the like are made of plastic such as polypropylene, polyethylene, polyacetal, nylon, polybutylene terephthalate, or the like. It is.

  The downstream rubber valve 4 is made of various rubbers such as butyl rubber, chloroprene rubber, nitrile rubber, silicone rubber, and fluorine rubber.

  The upstream ball valve 6 and the coil spring 8 are made of metal or plastic.

  The columnar member 7 having both the capacity reducing function of the storage space area B and the pressing function of the upstream ball valve 6 is held by the lower annular step 5c of the cylinder 5 while being urged downward by the coil spring 8. ing.

  The illustrated pump-type product uses a so-called “airless pump”, and the contents of the accommodation space area are reduced in accordance with the decrease in the contents in the accommodation space area A due to the contents discharge operation and the pressure there. The movable bottom plate 9e, which is an element, moves upward.

  This is because the movable bottom plate 9e communicates with the external space through the hole 9c of the bottom lid 9b, and the lower surface portion of the movable bottom plate receives upward atmospheric pressure.

The basic features of the illustrated content release pump mechanism are:
(31) The downstream valve of the storage space region B is formed by a pressure accumulation type downstream rubber valve 4 having an inner upright cylindrical portion 4a and an outer sealing action portion (reverse skirt portion 4f, skirt portion 4g). In addition, the operation of contracting the downstream rubber valve when the operation button 1 is pushed down (during the content discharge operation) is exclusively handled by the deforming action portion 4c of the upright cylindrical portion, and accordingly, the operation associated with the contraction operation of the downstream rubber valve. Suppressing the deformation of the sealing action part, and stabilizing the sealing action between the downstream rubber valve and the inner peripheral surface of the cylinder 5 that guides it,
(32) Depressurization of the storage space area when the columnar member 7 is provided in the storage space area B to reduce its actual capacity and the lower piston 3 integrated with the operation button 1 returns to the stationary mode position after the pressing operation. Increase the ratio,
(33) The upstream ball valve 6 is biased by the elastic piece portion 7g toward the annular tapered surface 5b which is the counterpart of the valve action.
And so on.

In the still mode of FIG. 1 and FIG. 2 where the operation button 1 is not pressed,
(41) The downstream rubber valve 4 integrated with the upper piston 2 and the lower piston 3 is held in a state where the reverse skirt portion 4f is engaged with the central cylindrical portion 10a of the screw cap 10,
(42) The entire downstream rubber valve 4 in this holding state is set to an initial state in which substantial elastic expansion and contraction in the vertical direction has not occurred.
(43) The annular lower end surface 4e of the downstream rubber valve 4 is in close contact with the annular step portion 3d of the lower piston 3, and the upstream ball valve 6 is in close contact with the annular tapered surface 5b of the cylinder 5.
(44) Due to the close action of each of the downstream rubber valve 4 and the upstream ball valve 6, the accommodation space area A and the storage space area B are both closed spaces.

  The upstream ball valve 6 is held by the inner peripheral surface 7h of the cylindrical portion 7d at its lateral portion, and is pressed toward the annular tapered surface 5b by three equally spaced elastic pieces 7g.

  Thus, since the upstream ball valve 6 is pressed down by the elastic piece 7g, the upstream ball valve is held in close contact with the annular tapered surface 5b even if the pump type product is set in an inverted state.

  When the operation button 1 is pushed downward in FIGS. 1 and 2, as shown in FIGS. 3 and 4, the upper piston 2, the lower piston 3, and the downstream rubber valve 4 integral with these pistons are coiled together with the operation button. It moves downward while resisting the elastic biasing force of the spring 8.

  As the lower piston 3 moves, the volume of the storage space B decreases and the content pressure therein increases.

  As the pressure of the contents in the storage space B increases, the entire downstream rubber valve 4 receives an upward force. When the pressure of the contents increases to a predetermined value, the deforming action portion 4c, which is a part of the upright cylindrical portion 4a of the downstream rubber valve 4, is deformed so as to contract in the vertical direction.

  At this time, the reverse skirt portion 4f and the skirt portion 4g continuously formed outside the upright cylindrical portion 4a are hardly deformed. For this reason, even when the downstream rubber valve 4 is moved during the content release operation for depressing the operation button 1, the sealing action between the downstream rubber valve and the inner peripheral surface of the cylinder 5 is not lowered.

  The annular lower end surface 4e of the downstream rubber valve 4 is separated from the annular step portion 3d of the lower piston 3 due to the contraction deformation of the deformation acting portion 4c.

  That is, the downstream valve (the downstream rubber valve 4 and the annular step portion 3d) of the storage space region B shifts from the closed state to the open state. In addition, the upstream valve (upstream ball valve 6 and annular tapered surface 5b) of the storage space area B remains closed.

  As a result, the contents already stored in the storage space area B are indicated by the “vertical groove-like portion 3c—the upper-end concave portion of the lower piston 3—the annular convex portion 2a” as indicated by the arrows in FIGS. It is discharged into the external space through a path of “inner space area−passage area 2b of the upper piston 2−passage part 1a of the operation button 1−output hole part 1b”.

When the user stops pressing down the operation button 1, as shown in FIG.
(51) Based on the elastic action of the coil spring 8, the operation button 1, the upper piston 2 and the lower piston 3 are shifted to the operation of returning to the stationary mode position,
(52) Due to the increase in the volume of the storage space area B accompanying the return of the lower piston 3, the pressure in the contents decreases, and the downstream rubber valve 4 also has its deforming portion 4c in the initial state from the contracted state so far. Return to (shape of still mode)
(53) By the shape return of the deforming action portion 4c, the downstream valve (the downstream rubber valve 4 and the annular step portion 3d) of the storage space region B changes from the open state to the closed state,
(54) Further, the upstream valve (the upstream ball valve 6 and the annular tapered surface 5b) is brought into the closed state due to the occurrence of a pressure difference with the storage space area A based on the decrease in the content pressure in the storage space area B. The upstream ball valve is shifted to the open state while moving upward while resisting the elastic force downward of the elastic piece 7g, and the contents of the storage space A are stored through the upstream valve in the open state. Flows into Zone B,
(55) Due to the increase in the pressure in the storage space area B based on the inflow of the contents, the upstream ball valve 6 that has been moved up due to the pressure difference of (54) until now is elastically acting below the elastic piece 7g. To move downward and come into close contact with the annular tapered surface 5b of the cylinder 5. That is, the upstream valve of the storage space area B returns to the closed state in the stationary mode.

  The content that has flowed into the storage space area B in (54) is released from the output hole 1b to the external space area when the operation button 1 is pressed next time.

Note that the above (54) is supplemented as follows.
As the content pressure in the storage space region B during the return operation of the upper piston 2 and the lower piston 3 decreases, the downward resultant force on the upstream ball valve 6 (downward content pressure from the storage space region B of the cylinder 5) , The self-weight of the upstream ball valve 6 and the elastic biasing force of the three elastic pieces 7g, etc.) become smaller than the upward content pressure from the accommodation space A with respect to the upstream ball valve.
As a result, the upstream ball valve 6 moves slightly upward while resisting the urging force of the elastic piece 7g (see FIG. 5).

  Since the decompression ratio of the storage space area B at the time of the return of the piston is increased by the existing volume of the columnar member 7 (as compared to the case where the columnar member is not provided), the contents of the storage space area A are moved to the storage space area. A strong suction force acts.

  Due to this strong suction force, the contents of the storage space area A of the container body 9 are “space between the lower opening 5a-longitudinal groove 7f-bottom surface 7c and the elastic piece 7g indicated by an arrow in FIG. It flows into the storage space area B of the cylinder 5 through a route such as “region (−peripheral surface opening 7 j) —concave portion 7 b”.

  Due to the inflow of the contents, when the above-mentioned downward resultant force to the upstream ball valve 6 exceeds the above-mentioned upward pressure, the upstream ball valve reliably moves downward and comes into close contact with the annular tapered surface 5b. The mechanism returns to the static mode of FIG. In addition, as described above, the movable bottom plate 9e is moved up by the action of the atmospheric pressure in accordance with the decrease in the internal pressure of the accommodation space area A.

  4, the lower end surface portion of the skirt portion 4g of the downstream rubber valve 4 is in contact with the upper annular step portion 5e of the cylinder 5.

  The contact state between the skirt portion 4g and the upper annular step portion 5e is set for the purpose of bleeding (priming) the storage space B when the pump type product is used for the first time.

  That is, when the pump-type product is not in use, the storage space area B contains air exclusively. Even if the operation button 1 is pushed down in this air storage state, the air volume only changes, and it is difficult for the air pressure to increase until the downstream rubber valve 4 is shrunk in the vertical direction and shifted to the open state.

  Therefore, when the user pushes down the operation button 1 of the pump-type product at the unused stage to the corresponding position in FIG. 4, for example, the skirt portion 4g of the downstream rubber valve 4 comes into contact with the upper annular step portion 5e of the cylinder 5. Thus, the deformation acting portion 4c is forcibly contracted in the upward direction.

  The annular lower end surface 4e of the upright cylindrical portion 4a is separated from the annular step portion 3d of the lower piston 3 by the forced upward contraction action received by the deformation acting portion 4c.

  The air that has initially entered the storage space B escapes from the space between the annular lower end surface 4e and the annular step 3d to the passage area 2b, the passage 1a, and the output hole 1b.

  Then, when the user releases the pressing operation of the operation button 1, the lower piston 3 and the like are moved up by the elastic force of the coil spring 8, and the pressure in the storage space area B is reduced.

  As the pressure in the storage space area B decreases, the upstream ball valve 6 that originally received the content pressure upward from the accommodation space area A moves away from the annular tapered surface 5 b of the cylinder 5.

  By this separation, the contents of the storage space area A of the container body 9 flow into the storage space area B of the cylinder 5 (see FIG. 5). As a result, the illustrated pump mechanism is set to the stationary mode of FIG.

  As clearly shown in FIG. 6, the columnar member 7 has the function of reducing the capacity of the storage space B inside the cylinder as a whole, and the upstream ball valve 6 is moved downward by the elastic piece 7g of the cylindrical portion 7d. And a function of restricting the movement of the upstream ball valve 6 in the left-right direction (the radial direction of the cylindrical portion) on the inner peripheral surface 7h of the cylindrical portion. One member.

  When the upstream ball valve 6 moves a little while resisting the urging force of the elastic piece 7g and the ball valve is opened (see FIG. 5), the contents of the storage space A inside the container body are three longitudinal grooves. It flows into the cylinder through 7f.

  The peripheral surface opening 7j can be said to be a so-called outlet of a mold used for setting a space area between the bottom surface 7c of the cylindrical portion 7a and the three longitudinal groove portions 7f. It also acts as a passage area for contents entering from 7f.

  The assembly procedure of the pump unit (upper piston 2, lower piston 3, downstream rubber valve 4, cylinder 5, upstream ball valve 6, columnar member 7, coil spring 8, screw cap 10) before being attached to the container body 9 is, for example, It becomes as follows.

(61) After passing the downstream rubber valve 4 through the upright bar 3a of the lower piston 3, it is attached to the upper piston 2 to form a piston unit.
(62) From the upper opening of the cylinder 5, the upstream ball valve 6 is placed on the annular tapered surface 5b, and the columnar member 7 is attached so as to hold it.
(63) Next, the coil spring 8 and the piston unit are sequentially inserted from the upper opening of the cylinder 5.
(64) Next, the upper piston 2 is passed through the central cylindrical portion 10a, and the screw cap 10 is attached to the cylinder 5.
(65) Next, the annular packing 10b is attached from below the cylinder 5 so as to contact the annular flange portion 5g.

Of course, the present invention is not limited to the illustrated mechanism.
(71) The columnar member 7 is provided in an arbitrary portion of the storage space area as an arbitrary shape other than that shown in the figure.
(72) Instead of the operation button 1, a known trigger type operation button (for example, see JP-A-2003-170978) is used.
(73) The upstream ball valve 6 is, for example, a non-ball-shaped integral member with the columnar member 7 (elastic piece portion 7g).
(74) As the columnar member 7, an integrated member of a cylindrical portion 7a and a cylindrical portion 7d manufactured separately is used.
(75) The elastic piece portion 7g is formed on the inner peripheral surface 7h.
(76) The number of each of the longitudinal groove portion 7f, the elastic piece portion 7g, and the inner peripheral surface 7h is arbitrarily set.
(77) As described repeatedly, instead of the movable bottom plate 9e and the hole 9c, a well-known contents suction pipe and a hole for inflowing outside air into the accommodating space A (see, for example, Japanese Patent Laid-Open No. 10-127051) Use
You may do it.

  Pump type 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, methyl cellulose, gelatin, starch, casein, hydroxyethyl cellulose, 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, disinfectants such as sodium benzoate and cresol, insect repellents such as Hillesroid and diethyltoluamide, antiperspirants such as zinc oxide, Softeners such as camphor and menthol, anti-asthma drugs such as ephedrine and adrenaline, sweeteners such as sucralose and aspartame, adhesives and paints such as epoxy resin and urethane, dyes such as paraphenylenediamine and aminophenol, dihydrogen phosphate Use a fire extinguishing agent such as ammonium or sodium bicarbonate.

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

1: operation button 1a: passage portion 1b for contents: output hole portion 2 for discharging contents: upper piston (stem)
2a: Ring convex portion 2b: Content passage area 2c: Lower cylindrical portion 2d for fitting the lower piston: Lower end large-diameter annular portion 2e: Ceiling step portion 3: Lower piston (stem)
3a: Upright rod-shaped portion 3b: Barrel-shaped portion 3c: Multiple vertical groove-shaped portions 3d: An annular stepped portion (valve seat)
3e: annular convex portion 3f: annular upper outer peripheral surface 4: pressure accumulation type downstream rubber valve 4a: upright cylindrical portion 4b: sandwiched portion 4c: deformation acting portion 4d: continuous base portion 4e: annular lower end surface (valve element)
4f: Reverse skirt (sealing part)
4g: Skirt part (sealing part)
5: Cylinder (housing)
5a: Lower opening 5b into which the contents flow in: Annular tapered surface (valve seat)
5c: Lower annular step portion 5d: Middle annular step portion 5e: Upper annular step portion 5f: Large diameter inner peripheral surface portion 5g: Annular flange portion 6: Upstream ball valve 7: Columnar member (space adjusting action portion)
7a: Cylindrical portion 7b: concave portion 7c for passage of contents: bottom surface 7d of cylindrical portion: cylindrical portion 7e: stepped portion 7f: three longitudinal groove portions 7g: elastic piece portion 7h: between longitudinal groove portions Between inner peripheral surface 7j: peripheral surface opening 8: coil spring 9: container main body 9a: opening-side cylindrical portion 9b: sheath-like bottom lid 9c: air inflow hole 9d: inner annular upright portion 9e: movable Bottom plate 9f: Movable bottom plate reverse skirt portion 9g: Movable bottom plate skirt portion 9h: Bottom step
10: Screw cap
10a: Central cylindrical part
10b: Annular packing A: Storage space for contents inside container body (internal space from movable bottom plate 9e to upstream ball valve 6)
B is a storage space area for contents inside the cylinder (internal space from the upstream ball valve 6 to the downstream rubber valve 4)

Claims (5)

Formed between the upstream valve arranged in the cylinder attached to the container body and the pressure accumulation type downstream rubber valve arranged inside the cylinder so as to exhibit the valve action on the piston interlocked with the content discharge operation In the content discharge pump mechanism in which the contents of the storage space area to be discharged to the external space based on the opening and closing action of the upstream valve and the downstream rubber valve with the movement of the piston,
The downstream rubber valve is
An upright cylindrical portion in which the entire vertical portion of the inner peripheral surface is in contact with the outer peripheral surface of the piston;
A sealing action part formed on the outside of the upright cylindrical part and exhibiting a sealing action with the inner peripheral surface of the cylinder,
The upright cylindrical part is
A clamped portion that is an upper end side portion of which the inner and outer peripheral surface portions are clamped by the piston and are not deformed even during the content discharge operation,
Having at least a deformation acting part following the sandwiched part,
A pump mechanism for discharging contents. The upright cylindrical part is
Having a continuous base that is continuously formed under the deformation acting part and becomes a starting part of the sealing action part;
The sealing action part is
An inverted skirt extending outward and upward from the continuous base;
A skirt part extending outward and downward from the continuous base part,
The content discharge pump mechanism according to claim 1. The storage space area is
It has a space adjustment action part to reduce its capacity,
The content discharge pump mechanism according to claim 1 or 2 , wherein The cylinder is
A movable bottom plate for airless operation;
A bottom lid formed with a hole for inflow of air into the movable bottom plate,
The content discharge pump mechanism according to any one of claims 1 to 3 . A pump mechanism for discharging the contents according to any one of claims 1 to 4 , and the contents are contained inside the container body.
This is a pump-type product.

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