JP2011063289A - Pump mechanism having back suction function and pumping product having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simplify the assembly procedure of a pump mechanism having the back suction function, to reduce the cost of the entire mechanism, and to reliably ensure the back suction function. <P>SOLUTION: In a spout 1 which is moved downwardly to reduce the volume of a storage space area B by the liquid content dispensing operation of a user and moved upwardly to increase the volume of the storage space area B by the returning action of a bellows member 6, a dispense valve member 3 which is relatively moved upwardly to open dispense valve operating units (1d, 3a) and relatively moved downwardly to close the dispense valve operating unit is frictionally engaged with an inner raising part 5c on the container body side or the outer circumferential surface of the upper cylindrical part of a suction valve member 4, and the spout 1 is moved upwardly while the dispense valve operating units is opened in the initial stage when releasing the operation, and liquid content remaining in a passage part 1a is sucked in the storage space area B. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a pump mechanism having a back suction function, such as an airless pump mechanism.

  In particular, immediately after cancellation of the liquid content discharge operation of the operation member, back suction is performed on the residual liquid content on the discharge port side by the valve action between the operation member and the discharge valve member and the action of the operation member return operation unit. The present invention relates to a pump mechanism that exhibits an action.

  The “liquid content” used in this specification is a concept including various contents such as cream, paste or sol as described later.

  The present invention relates to an airless pump mechanism of a type in which a bottom portion defining a liquid content accommodation space region of a container body moves upward in response to a pressure drop in the space region accompanying a liquid content discharge operation, and the liquid content Each of the fixed-bottom type normal pump mechanisms in which the air corresponding to the pressure drop in the housing space flows into the space is targeted. However, in the following description, the case of an airless pump mechanism is mainly assumed for mere explanation.

  An airless pump mechanism itself having a back suction function is disclosed in, for example, Patent Document 1 below.

In the case of this airless pump mechanism (back suction mechanism)
(11) A discharge valve 19 (corresponding to the bellows member or cylindrical seal member of the present invention) provided upstream of the press-down head 12 with discharge nozzle (corresponding to the spout of the present invention) and interlocking therewith. Is equivalent to the discharge valve member of the present invention,
(12) The discharge valve 19 is formed by fitting an outer part 19b that is fixed to the piston 14 and is not substantially deformed, and an inner part 19a that is elastically deformed and exhibits an opening / closing action between the outer part 19b. Yes,
(13) When the press-down head 12 with discharge nozzle is in the fully-pressed state (= bottom dead center state), the inner part 19a of the discharge valve 19 is pushed up by the projecting portion 17d of the liquid sealing part 17 fixed to the cylinder, that is, the inner The part 19a is forcibly deformed into an open state in a manner that resists elastic action,
(14) Subsequently, when the push-down head 12 with discharge nozzle is released and the discharge valve 19 is also linked upward, the initial inner part 19a is still pushed up by the projecting portion 17d, and the discharge valve action portion is Exhibits a back-suction action in the open state,
It is like that.

JP-A-10-59405

  In such a back suction mechanism, a discharge valve in which a deformable inner part and a non-deformable outer part are fitted is used, and the pressing head with a discharge nozzle returns to the stationary mode from its bottom dead center state. A protruding portion (liquid sealing part) for maintaining the discharge valve action portion in an open state at a stage is separately provided.

  Further, the discharge valve action portion is set in an internal space region (= upstream space region of the head) of the piston attached to the pressing head with the discharge nozzle.

  For this reason, the number of components of the back suction mechanism is increased, and it takes time to assemble the back suction mechanism, resulting in an increase in the cost of the entire mechanism.

  In addition, the set point of the discharge valve that exhibits the back suction action is a portion away from the nozzle tip portion that is the discharge port of the liquid content, and the liquid content remaining at the discharge port and the nozzle portion in the vicinity thereof There is a problem that it is difficult to efficiently draw in the storage space area (the space area between the discharge valve and the suction valve).

  Therefore, in the present invention, the discharge valve action part includes an opening part on the discharge port side of the operation member and a movable discharge valve member that is separate from the operation member (the valve action part is not elastically deformed). The opening state between the opening and the discharge valve member, which is essential for the back suction action at the initial stage of returning to the stationary mode after the discharge operation is released, is used for maintaining a special open state. It is made to continue, without requiring a member etc. at all.

  An object of the present invention is to constitute a back suction mechanism (pump mechanism) using a discharge valve action portion comprising the operation member opening portion and a discharge valve member, thereby simplifying the assembly procedure of the mechanism, An object is to reduce the cost of the entire mechanism.

  In addition, the discharge valve action portion is set on the discharge port side of the operation member, thereby ensuring the operation of drawing the liquid content remaining in the discharge port and the nearby passage portion into the storage space area. Aim.

The present invention solves the above problems as follows.
(1) Immediately after cancellation of the liquid content discharge operation of the operation member (for example, spouts 1 and 2 described later), the valve action between the operation member and the discharge valve member (for example, discharge valve members 3 and 3 ′ described later) And a pump mechanism that exhibits a back suction action on the residual liquid content on the discharge port side by the action of the operation member return actuating part (for example, a bellows member 6 and a coil spring 9 described later)
The operating member is
An opening portion on the discharge port side (for example, openings 1c and 2a described later);
In the liquid content discharge operation, an interlocking action portion (for example, a drive action portion 1e, an upper vertical rib-like portion 2d described later) that contacts the discharge valve member and drives it in the operation direction of the discharge operation is provided. Have
The discharge valve member is
An independent movable member different from the operation member,
Having a valve action part (for example, an outward gentle projecting part 3a to be described later) that exhibits an opening / closing action with the opening part in response to the liquid content discharge operation to the operation member and the release thereof,
The operation member and the discharge valve member are
During the liquid content discharge operation,
First, the opening part of the operation member is separated from the valve action part, and then the interlocking action part drives the discharge valve member in the operation direction,
When releasing the liquid content discharge operation,
First, based on the return action of the operating member return operating portion, the operating member is in a direction opposite to the operating direction while the portion between the opening portion and the valve operating portion is open with respect to the discharge valve member. By moving, the back suction action is exhibited, and then the operation member and the discharge valve member are returned to the stationary mode in conjunction with the intermediate portion being closed based on the return action. Consisting of structure,
A pump mechanism is used.
(2) In (1) above,
A cover body (for example, cover bodies 5 and 7 described later) that is attached to a container main body (for example, container body 10 described later) for setting the liquid content storage space together with the container body is provided. And
The cover body is
Holes (for example, inflow holes 5a and 7a described later) into which the liquid content in the accommodation space flows, and
A first annular upright portion (for example, a cylindrical inner upright portion 5c described below, which is formed around the hole portion and has a function of holding at least the discharge valve member at the bottom dead center position by a frictional action therewith. 7c)
The discharge valve member is
A held portion (for example, an annular reverse skirt described later) that abuts on the inner peripheral surface of the first annular upright portion at least at the bottom dead center position and is held in this abutting state by a frictional force with the inner peripheral surface. Part 3d),
The one with the configuration is used.
(3) In the above (2), attached to the inner side of the first annular upright portion, the outer peripheral surface portion guides the movement of the discharge valve member in the operation direction and the reverse direction, and It has a suction valve member (for example, a suction valve member 4 described later) having a valve function for the hole,
The one with the configuration is used.
(4) In the above (1) to (3),
The operation member (for example, spout 2 described later)
An annular upper surface portion (for example, an annular upper surface portion 2g described later) to be operated is provided,
The inner opening portion of the annular upper surface portion is formed of a cylindrical member that acts as the opening portion on the discharge port side.
The one with the configuration is used.
(5) In the above (2) to (4),
One end and the other end of the operating member and the cover body (for example, a cover body 5 described later) are attached to the opening portion from the suction valve (for example, a suction valve 4a described later) in a state where the hole is closed. A liquid content storage space area (for example, a storage space area B described later) is set, and a cylindrical bellows member (for example, a bellows member 6 described later) that can act as the operation member return operating portion is provided.
The one with the configuration is used.
(6) In (5) above,
The suction valve member is
It consists of the cylindrical part in which the said suction valve which acts with respect to the said hole part was formed, and the liquid content passage 1st from the inside of a cylindrical part to the exterior of a cylindrical part is formed in the side part by the side of the suction valve. A cylindrical member provided with a through portion (for example, a notch portion 4c described later),
The discharge valve member is
The side of the bottom side is formed by a bottomed cylindrical portion whose opening side is guided by the outer peripheral surface of the suction valve member and forms a downstream inner space region continuous from the upstream inner space region of the suction valve member. In addition, a bottomed tubular member provided with a second through portion (for example, a longitudinal cutout portion 3b described later) for passing liquid contents from the inside of the bottomed tubular portion to the outside of the bottomed tubular portion,
As a liquid content passage area from the suction valve portion to the opening portion,
A first passage area extending from the upstream internal space area through the downstream internal space area to the second penetrating portion and the opening portion ahead of the second penetrating section;
A second passage area extending from the second penetrating portion to the opening through the external space area between the suction valve member and the discharge valve member and the bellows member is set.
The one with the configuration is used.
(7) In the above (2) to (4),
A second annular standing portion (for example, a cylindrical shape described later) formed outside the first annular standing portion (for example, a cylindrical inner standing portion 7c described later) of the cover body (for example, a cover body 7 described later). Intermediate stand 7f),
It is attached to the operation member (for example, a spout 1 described later), exhibits a sealing action between the inner peripheral surface of the second annular upright portion, and the hole (for example, an inflow hole 7a described later). A cylindrical movable member (for example, a cylindrical shape described later) that sets a liquid content storage space area (for example, a storage space area B (described later)) from a suction valve (for example, a suction valve 4a described later) in a closed state to the opening portion. A sealing member 8)
The one with the configuration is used.
(8) In (7) above,
The suction valve member is
It consists of the cylindrical part in which the said suction valve which acts with respect to the said hole part was formed, and the liquid content passage 1st from the inside of a cylindrical part to the exterior of a cylindrical part is formed in the side part by the side of the suction valve. A cylindrical member provided with a through portion (for example, a notch portion 4c described later),
The discharge valve member is
The side portion on the bottom side is composed of a bottomed cylindrical portion whose opening side is guided by the outer peripheral surface of the suction valve member and forms a downstream inner space region continuous from the upstream inner space region of the suction valve member. In addition, a bottomed cylindrical member provided with a second through portion (for example, a longitudinal cutout portion 3b described later) for passing the liquid contents from the inside of the bottomed cylindrical portion to the outside of the bottomed cylindrical portion,
As a liquid content passage area from the suction valve portion to the opening portion,
A first passage area extending from the upstream internal space area through the downstream internal space area to the second penetrating part and the opening part ahead of the second penetration part;
The second penetrating portion passes through the external space between the suction valve member, the discharge valve member, the second annular upright portion, and the cylindrical movable member, and reaches the opening portion. Aisle area is set,
The one with the configuration is used.
(9) In the above (1) to (8),
An elastic member that is disposed in a space area outside the passage area of the liquid content in a manner isolated from the passage area, and acts as the operation member return operation portion by urging the operation member in the reverse direction. (For example, a coil spring 9 described later)
The one with the configuration is used.

  The present invention is directed to a pump mechanism having a back suction function having the above-described configuration and a pump-type product including the pump mechanism.

In addition, the pump mechanism provided with each of the above-described back suction functions (1) to (9) is roughly
・ (1) to (3) correspond to FIGS.
(4) corresponds to FIGS.
(5) and (6) correspond to FIGS.
(7) and (8) correspond to FIGS.
(9) corresponds to FIGS.

  In this way, the present invention uses an opening / closing action portion comprising the opening portion on the discharge port side of the operation member and a discharge valve member movable separately from the operation member as the discharge valve action portion, and after the discharge operation is released. The opening state between the opening portion and the discharge valve member, which is essential for the back suction action in the initial stage of returning to the stationary mode, continues without requiring any special opening state maintaining member or the like. I have to.

  Therefore, the assembly procedure of the back suction mechanism (pump mechanism) can be simplified, and the cost of the entire mechanism can be reduced.

  In addition, it is possible to ensure the operation of drawing the liquid content remaining in the discharge port and the passage portion near the discharge port into the storage space.

It is explanatory drawing which shows the stationary mode of the airless pump type product using the spout of a horizontal discharge type and the bellows member as a member for formation of a liquid content storage space area. It is explanatory drawing which shows the liquid content discharge state of the airless pump type product of FIG. It is explanatory drawing which shows the spout (discharge valve member) bottom dead center state of the airless pump type product of FIG. It is explanatory drawing which shows the back suction state with the spout (discharge valve member) bottom dead center of the airless pump type product of FIG. 1 returning to a stationary mode, ie, the discharge valve action part still open. The return stage to the stationary mode after the end of the back suction in FIG. 4, that is, the discharge valve action part is closed and the suction valve action part is opened, and the liquid content to be discharged next time flows into the storage space area from the storage space area. FIG. It is explanatory drawing which shows the stationary mode of the airless pump type product using the spout of an upper discharge type and the bellows member as a member for formation of a liquid content storage space area. It is explanatory drawing which shows the spout (discharge valve member) bottom dead center state of the airless pump type product of FIG. It is explanatory drawing which shows the back suction state with the spout (discharge valve member) bottom dead center of the airless pump type product of FIG. 6 returning to a stationary mode, ie, the discharge valve action part still open. It is explanatory drawing which shows the stationary mode of the airless pump type product using the cylindrical discharge member (non-bellows shape) as a member for forming a lateral discharge type spout and a liquid content storage space area. It is explanatory drawing which shows the spout (discharge valve member) bottom dead center state of the airless pump type product of FIG. FIG. 10 is an explanatory diagram showing an initial stage of returning from the spout (discharge valve member) bottom dead center of the airless pump type product of FIG. 9 to the stationary mode, that is, a back suction state in which the discharge valve action part is still open. It is explanatory drawing which shows the shape of a suction valve member, (a) shows a perspective shape, (b) has shown sectional shape.

  The form for implementing this invention is demonstrated using FIGS. 1-12.

  The components of the reference numbers with alphabets (for example, the passage portion 1a) used in FIGS. 1 to 12 in principle indicate that they are part of the components (for example, spout 1) of the number portions of the reference numbers.

1 to 5, 9, 10, and 11,
1 is a spout of a horizontal discharge type that is a target of a user's liquid content discharge operation,
1a is a passage portion of the liquid content formed in a substantially cylindrical state in the lateral direction,
1b is a hole for discharging liquid contents on the output side of the passage portion 1a,
1c is a circular opening formed on the input side of the passage portion 1a,
1d is a demarcation element of the opening 1c, and an inward gentle projecting portion that exhibits a valve action together with an outward gentle projecting portion 2a described later,
1e is formed, for example, in a rib shape on a part of the ceiling portion of the passage facing the opening 1c, abuts on the upper surface portion of the discharge valve member 3 to be described later, delayed from the start of the spout pressing operation, A driving action unit for moving the discharge valve member 3 downward in conjunction with the discharge valve member 3;
1f is an inner cylindrical portion that extends downward following the inwardly loosely projecting portion 1d,
1g is an annular locked taper portion formed in an outwardly extending manner on the outer peripheral surface on the lower end side of the outer cylindrical portion of the spout,
1h is a plurality of rib-shaped portions formed in the radial direction of the ceiling surface of the spout,
Respectively.

6 to 8,
2 is an upper discharge type spout that is the target of the user's liquid content discharge operation,
2a is a circular opening formed in the center of the upper surface of the spout,
2b is an element for forming the opening 2a, and an inward gentle projecting portion that exhibits a valve action together with an outward gentle projecting portion 3a described later,
2c is an inner cylindrical portion that extends downward following the inwardly loosely projecting portion 2b,
2d is formed on the upper inner peripheral surface of the inner cylindrical portion 2c so as to jump in the circumferential direction, and is delayed from the start of the spout pressing operation, and a lower vertical rib portion 3e of a discharge valve member 3 ′ described later. A plurality of upper vertical rib-shaped portions that are in contact with the upper end portion of the discharge valve member 3 and then moved downward in conjunction with the discharge valve member 3 ′,
2e is an annular locked taper portion formed in an outwardly extending manner on the outer peripheral surface on the lower end side of the outer cylindrical portion of the spout,
2f is a plurality of rib-shaped portions formed in the radial direction of the ceiling surface of the spout,
2g is an annular upper surface portion to be subjected to the pushing operation of the spout,
Respectively.

1 to 12 (3 'and 3e are used only in FIGS. 6 to 8),
3, 3 ′ is a sheath-like discharge valve member arranged in a vertically movable manner from the openings 1c and 2a of the spouts 1 and 2 to the inner cylindrical portions 1f and 2c and the lower space area thereof,
3a is an annular outwardly gradual projecting portion that is formed on the outer peripheral surface portion of the upper end side of the discharge valve member in such a manner that it can be brought into close contact with the inwardly gradual projecting portions 1d and 2b,
3b is a vertically cut-out portion for passing the liquid contents formed by four jumps on the upper peripheral surface portion of the discharge valve member;
3c is an annular inner surface gentle protrusion formed in the lower part of the inner peripheral surface of the discharge valve member,
3d is an annular reverse skirt formed at the lower end of the discharge valve member;
3e is formed on the outer peripheral surface portion below the longitudinal notch 3b in such a manner that it jumps in the circumferential direction, and its upper end portion is the lower end portion of the upper longitudinal rib portion 2d as the spout 2 is pushed down. A plurality of lower vertical rib-shaped parts that are in contact with the lower part and interlock with the lower direction,
4 is a cylinder with a guide function for the vertical movement of the discharge valve member 3, a suction valve member that does not move up and down,
4a is a circular suction valve formed in the lower end side internal space area of the suction valve member and exhibiting a valve action to an inflow hole 5a described later,
4b is a total of three arc-shaped elastic pieces connecting the suction valve 4a to the inner peripheral surface of the suction valve member;
4c is a cutout portion for passing the liquid content corresponding to a part of the peripheral surface and the upper surface of the lower large-diameter cylindrical portion of the suction valve member,
4d is a ring convex portion for engagement formed in the lower end side portion of the lower large-diameter cylindrical portion,
4e is formed on the outer peripheral surface of the suction valve member, and is an annular outer surface gentle projecting portion that engages with the inner surface gentle projecting portion 3c of the discharge valve member 3 in the stationary mode.
Respectively.

1 to 8,
5 is a cover body in which the suction valve member 4 is fixedly attached, and a container body 10 and a later-described container body 10 and a movable bottom member (seal member) 11 form a later-described liquid content accommodating space A;
5a is an inflow hole when the suction valve 4a is opened so that the liquid content in the housing space moves toward the internal space of the suction valve member 4,
5b is formed in an upright manner around the inflow hole 5a, and receives the suction valve 4a in a close state, thereby setting the inflow hole to a closed state,
5c is formed around the valve action part 5b to hold the ring-shaped convex part 4d of the suction valve member 4 in a fixed manner and to the reverse of the discharge valve member 3 that moves downward as the spouts 1 and 2 are pushed down. A cylindrical inner upright portion having a function of abutting against the skirt portion 3d and positively holding the discharge valve member by frictional action between the abutting portions;
5d is formed in the lower part of the inner peripheral surface of the inner upright portion 5c, and an annular concave portion that holds the suction valve member in a fixed state by engagement with the annular convex portion 4d of the suction valve member 4,
5e is formed intermittently in the circumferential direction of the upper end side portion of the inner upright portion 5c, and the passage area of the liquid content at the stage where the reverse skirt portion 3d abuts on the portion as the discharge valve member 3 moves downward A vertical notch that acts as
5f is formed in an extending manner on the upper end portion of the inner peripheral surface of the outer cylindrical upright portion of the cover body, and when an excessive excessive force is applied to the spouts 1 and 2, the locked tapered portion 1g , 2e to prevent the spout from coming off from the cover body, the locking taper portion 6 has an upper cylindrical portion and a lower cylindrical portion that are the inner cylindrical portions 1f, 2c of the spouts 1, 2, respectively. And a liquid content storage space area B, which will be described later, from the suction valve 4a to the inwardly protruding portions 1d, 2b (discharge valve action portions) by fitting to the outer peripheral surfaces of the inner standing portion 5c of the cover body 5. Bellows member to be formed,
Respectively.

9 to 11,
7 is a cover body in which the suction valve member 4 is mounted in a fixed state, and a container body 10 and a movable bottom member (seal member) 11 which will be described later form a liquid content accommodation space area A which will be described later.
7a is an inflow hole when the suction valve 4a is opened and the liquid content in the housing space moves toward the internal space of the suction valve member 4,
7b is an annular valve action portion that is formed in a standing manner around the inflow hole 7a and receives the suction valve 4a in a close state to set the inflow hole in a closed state;
7c is formed around the valve action portion 7b, and holds the suction valve 4a fixed, and abuts against the reverse skirt portion 3d of the discharge valve member 3 that moves downward as the spout 1 is pushed down. A cylindrical inner standing portion having a function of positively holding the discharge valve member by frictional action between each other,
7d is formed in the lower part of the inner peripheral surface of the inner upright portion 7c, and an annular concave portion that holds the suction valve member in a fixed state by engagement with the annular convex portion 4d of the suction valve member 4,
7e is formed intermittently in the circumferential direction of the portion including the upper end side of the inner upright portion 7c, and the liquid content at the stage where the reverse skirt portion 3d abuts on the portion as the discharge valve member 3 moves downward. A vertical notch that acts as a passage area,
7f is a cylindrical intermediate upright portion formed around the inner upright portion 7c and having a guide function for a seal member 8 described later.
7g is formed in an inwardly extending manner on the inner peripheral surface upper end portion of the outer cylindrical upright portion of the cover body, and when an excessive upward force is applied to the spout 1, An annular locking taper portion that prevents the spout from coming off the cover body by contact;
8, the cylindrical upper portion is fitted to each outer peripheral surface of the inner cylindrical portion 1f of the spout 1, and the lower end side is in close contact with the inner peripheral surface of the intermediate upright portion 7f. A cylindrical seal member that forms a liquid content storage space area B, which will be described later, up to (the discharge valve action portion),
8a is an upper reverse skirt portion that exhibits a sealing action with the inner peripheral surface of the intermediate standing portion 7f,
8b is a lower skirt portion that exhibits a sealing action with the inner peripheral surface of the intermediate standing portion 7f,
Respectively.

6 to 11, reference numeral 9 denotes a coil which is disposed between the rib-like portions 1h and 2f of the spouts 1 and 2 and the bottom surface portions of the cover bodies 5 and 7 and biases the spout upward (stationary mode). spring,
Is shown.

1 to 11,
10 is a container body for storing liquid contents,
10a is a hole for inflow of outside air,
11 indicates that the liquid content in the container body is transferred from the inflow holes 5a and 7a of the cover bodies 5 and 7 to the inside of the suction valve member 4 as the spout is restored by releasing the pressing operation of the spouts 1 and 2. A movable bottom member (seal member) that moves upward while in close contact with the inner peripheral surface of the container body 10 when moving toward the space side,
11a is a reverse skirt portion that exhibits a sealing action with the inner peripheral surface of the container body 10,
A is a storage space area for the liquid contents inside the container body defined by the cover bodies 5 and 7, the container body 10 and the movable bottom member 11,
B is the inwardly loosely projecting portions 1d and 2b (inner cylindrical portions 1f and 2c) of the spouts 1 and 2, the outwardly gently projecting portion 3a of the discharge valve member 3, the suction valve 4a and the bellows member 5, and the cover body 7. A storage space area defined by the intermediate upright portion 7f, the seal member 8 and the like, in which the liquid content to be discharged next is held,
Respectively.

  Here, the spouts 1 and 2, the discharge valve members 3 and 3 ′, the suction valve members 4, the cover bodies 5 and 7, the seal member 8, the container body 10 and the movable bottom member 11 are respectively made of polypropylene, polyethylene, polyacetal, nylon, It is made of plastic such as polybutylene terephthalate.

  The bellows member 6 is made of plastic, made of rubber (made of thermosetting elastomer) made of nitrile butadiene rubber (NBR), silicon rubber, butyl rubber, fluorine rubber, or the like, or made of thermoplastic elastomer.

  The coil spring 9 is made of metal or plastic.

  The discharge valve members 3 and 3 ′ are made of a single member, and have such a property that the outward loose projecting portion 3 a that is the valve action portion is not deformed even by an increase in pressure in the valve storage space region during the discharge operation. .

  Also, the inner surface of the discharge valve members 3 and 3 ′, and the outer peripheral surface of the cylindrical portion of the suction valve member 4 that guides the displacement operation in the vertical direction (the lower cylinder of the outer surface of the gentle protrusion 4e). The outer peripheral surface of the cylindrical portion) means that at least the discharge valve member is held at the bottom dead center position by the frictional force with the outer peripheral surface of the cylindrical portion when the discharge valve member reaches the bottom dead center. The shape and properties of the embodiment are as follows.

  For example, an outer diameter of the lower cylindrical portion of the outer surface gentle projecting portion 4e is set to be large on the lower side, and the inner surface of the discharge valve member 3, 3 ′ is at or near the bottom dead center position. The outer diameter of the lower cylindrical portion with which the shape portion 3c abuts is made larger than the inner diameter of the discharge valve members 3 and 3 ′ at the inner surface gently protruding portion.

The basic features of the back suction mechanism in the illustrated airless pump are:
(21) Valve action comprising spouts 1 and 2 as a discharge valve action part, and a discharge valve member 3 which is a member independent of the spout and exhibits a separating action with the spout when the spout is pushed down and released. Set the
(22) The initial stage of the process in which the discharge valve action part returns from the previously opened state to the closed state in the stationary mode after the push-down operation is released, that is, the spouts 1 and 2 are moved upward while the discharge valve action part is still open. As the volume of the storage space area B increases at the stage where it is present, it exerts a back suction action on the residual liquid content on the pump discharge port side (see FIGS. 4, 8, and 11).
That is.

Another basic feature of this back suction mechanism is
(31) A discharge valve action part, that is, a back suction mechanism is provided near the liquid content discharge port (see FIGS. 1 to 5 and 9 to 11) or the liquid content discharge port itself (see FIGS. 6 to 8). Formed,
That is.

The airless pump type product shown is
・ Using a lateral discharge type spout 1 and a bellows member 6 as a member for forming the storage space B (Part 1: FIGS. 1 to 5)
-Using an upper discharge type spout 2 and a bellows member 6 as a member for forming the storage space B (Part 2: FIGS. 6 to 8)
· Using a lateral discharge type spout 1 and a seal member 8 as a member for forming the storage space B (Part 3: FIGS. 9 to 11)
There are three types.

  All airless pump type products have the same operation mode, and hereinafter, an airless pump (FIGS. 1 to 5) using the spout 1 and the bellows member 6 will be mainly described.

In the static mode of airless pump products (see Fig. 1, Fig. 6 and Fig. 9),
(41) The spouts 1 and 2 are respectively urged upward by the elastic action of the bellows member 6 and the coil spring 9,
(42) Due to this urging force, the discharge valve action part, that is, the valve action part composed of the inwardly loose projecting parts 1d and 2b of the spouts 1 and 2 and the outward slow projecting part 3a of the discharge valve member 3 is brought into close contact with each other. Closed state,
(43) Similarly, the inner surface of the discharge valve member 3 is held in a state of being engaged with the outer surface of the suction valve member 4 and the outer surface of the suction valve member 4 is engaged.
(44) The locked tapered portions 1g and 2e of the spouts 1 and 2 are held in a state of being slightly separated from the locked tapered portions 5f and 7g of the cover bodies 5 and 7,
(45) The suction valve 4a is in close contact with the valve action portions 5b and 7b of the cover bodies 5 and 7,
(46) In the storage space area B, the suction valve 4a is temporarily opened (see FIG. 5) due to a decrease in internal pressure due to the release of the previous spout pressing operation (= liquid content discharge operation) (see FIG. 5). It is the closed space area after the liquid content of the accommodation space area A flows in from the part.

  When the upper surface portions of the spouts 1 and 2 in the stationary mode (annular upper surface portion 2g in the case of the spout 2) are pushed down, first, the spouts 1 and 2 are placed on the discharge valve members 3 and 3 ′. The drive action portion 1e and the upper vertical rib-like portion 2d are moved downward until they come into contact with the upper surface portion of the discharge valve member 3 and the upper end portion of the lower vertical rib-like portion 3e (discharge valve member 3 ′), respectively.

  In this contact state, the inwardly loose projecting portions 1d and 2b (spouts 1 and 2) of the discharge valve operating portion and the outward gentle projecting portion 3a (discharge valve members 3 and 3 ') are separated from each other. That is, the discharge valve action part is in an open state.

  After this contact, the discharge valve members 3 and 3 ′ are interlocked downward together with the spouts 1 and 2, and the capacity of the storage space B is reduced (see FIG. 2).

  As the volume decreases, the storage space area B is pressurized, and the liquid content stored in the space area is discharged from the open discharge valve action portion to the external space area. At this time, of course, the suction valve 4a remains closed.

In addition, as shown in FIG. 2, the intermediate path when the liquid content of the storage space area B is discharged to the external space area
The annular space between the inner cylindrical portions 1f and 2c of the spouts 1 and 2 and the bellows member 6 and the outer peripheral surfaces of the discharge valve member 3 and the suction valve member 4, the discharge valve member 3 and the suction valve member 4; Each internal space area and the longitudinal cutout 3b
In other words, there are two systems in parallel.

  The liquid contents in the case of the spout 1 in FIGS. 1 to 5 and 9 to 11 are discharged from the hole 1b to the external space region through the passage portion 1a.

  Moreover, the liquid content in the case of the spout 2 in FIGS. 6 to 8 is discharged directly from the opening 2a to the external space area.

  As an application mode of the airless pump with a spout, for example, the annular upper surface portion 2g of the spout 2 is pushed down with cotton, paper, cloth or the like placed on the opening 2a, and the liquid content in the storage space B is changed to cotton or the like. Application and penetration.

  3, 7 and 10 show a state in which the spouts 1 and 2 are pushed down to the bottom dead center, respectively.

In the bottom dead center state of these spouts 1 and 2,
(51) The above-mentioned discharge valve action part (the valve action part consisting of the inwardly loose projections 1d and 2b of the spouts 1 and 2 and the outward gentle protrusion 3a of the discharge valve member 3) is opened,
(52) The suction valve 4a is closed,
(53) The liquid content discharge operation is completed,
(54) The bellows member 6 and the coil spring 9 are each compressed in a form that resists their own elastic force,
(55) The upper end portion of the reverse skirt portion 3d of the discharge valve member 3 pushed down by the spouts 1 and 2 is frictionally engaged with the inner peripheral surfaces of the inner standing portions 5c and 7c of the cover bodies 5 and 7,
(56) Similarly, the inner surface loosely projecting portion 3c of the discharge valve member 3 is frictionally engaged with the outer peripheral surface of the upper cylindrical portion of the suction valve member 4,
(57) The liquid contents to be discharged remain in the passage portion 1a and the opening 1c of the spout 1 and the opening 2a of the spout 2 and the like.
It is in a state.

  When the user stops the pressing operation of the spouts 1 and 2, as shown in FIGS. 4, 8, and 11, only the spouts 1 and 2 have the bellows member 6 while the substantially discharge valve member 3 remains at the bottom dead center position. And return to the upper side by the elastic action of the coil spring 9.

  The returning operation of only the spouts 1 and 2 continues until the inward gentle protrusions 1d and 2b come into contact with the outward gentle protrusion 3a of the discharge valve member 3. After the contact, the spouts 1 and 2 and the discharge valve member 3 are interlocked upward.

  During the returning operation of only the spouts 1 and 2, the discharge valve action part between the spouts 1 and 2 and the discharge valve member 3 is separated, and the discharge valve member 3 is the frictional engagement of the above (55) and (56). It is substantially held at the position of the bottom dead center by the combined action.

  Thus, since the spouts 1 and 2 move upward while the discharge valve action portion is open, the pressure in the space area immediately upstream of the discharge valve action portion decreases.

  As a result, the liquid contents remaining in the passage portion 1a and the opening portion 1c of the spout 1 and the opening portion 2a of the spout 2 are stored in the storage space area as shown by the arrows in FIGS. Aspirated into B. That is, a back suction action occurs.

  This back suction action is caused by the inwardly loosely projecting portions 1d and 2b of the spouts 1 and 2 coming into contact with the outwardly gently projecting portion 3a of the discharge valve member 3, that is, the discharge valve acting portion shifts from the open state to the closed state. It ends by doing.

  Then, after the discharge valve action part shifts from the open state to the closed state, the spouts 1 and 2 and the discharge valve member 3 move up to return to the stationary mode state shown in FIGS.

  In the process of returning the spouts 1 and 2 and the discharge valve member 3 to the stationary mode, the volume of the storage space area B increases and the pressure of the storage space area decreases.

  As the pressure drops, the suction valve 4 a opens, and the liquid content in the storage space area A of the container body 10 flows into the storage space area B. At this time, the discharge valve action portion is of course closed. Then, when the pressure difference between the two space regions is almost eliminated, the suction valve 4a is closed and the mode is changed to the stationary mode. In addition, the liquid content which flowed into the storage space area B from the accommodation space area A is a discharge target content at the time of the next spout pressing operation.

  That is, when the liquid content in the internal space region B is discharged from the hole 1b or the opening 2a to the external space region by the liquid content discharge operation associated with the pressing operation of the spouts 1 and 2, the liquid corresponding to the discharge amount. The contents flow from the storage space area A of the container body into the storage space area B on the downstream side.

  As the liquid content flows into the storage space area B, the pressure in the accommodation space area A becomes smaller than the atmospheric pressure, so that the movable bottom member 11 moves upward in the figure by the action of the atmospheric pressure. The lower space in the container body defined by the bottom surface portion of the container body 10 and the lower surface portion of the movable bottom member 11 is always in communication with the external space through the hole 10a.

Of course, the present invention is not limited to the above-described embodiments.
(61) A coil spring 9 is provided in the pump mechanism of FIGS.
(62) The coil spring 9 of the pump mechanism of FIGS.
(63) The spout 2 and the discharge valve member 3 ′ of FIG. 6 are used as the spout and the discharge valve member of the pump mechanism of FIGS.
(64) The above-described back suction mechanism is applied to a fixed bottom type pump mechanism in which air corresponding to the pressure drop in the liquid content containing space area flows into the space area.
(65) The movable bottom member 11 is omitted, and an inner container (such as a bag or a soft container having a bellows structure) with an internal space communicating with only the inflow hole 5a is added, and the inner space is accommodated in the accommodation space. Area A,
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.

  The contents stored in the container body can be used in various liquid forms. Examples of the ingredients blended in the contents include powdery substances, oil components, alcohols, surfactants, polymer compounds, The active ingredient according to each use, water, etc. are mentioned.

  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, antibacterial agents such as sodium benzoate and cresol, insect repellents such as Hillesroid and diethyltoluamide, antiperspirants such as zinc oxide, Coolants 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.

(Used in FIGS. 1-5, 9, 10, and 11)
1: Side spout 1a: Liquid content passage portion 1b: Liquid content discharge hole 1c: Circular opening 1d: Inwardly loose projecting portion 1e exhibiting valve action: Drive action portion 1f : Inner cylindrical portion 1g: Annular taper portion for locking 1h: Rib-shaped portion

(Used in FIGS. 6-8)
2: Upper discharge type spout 2a: Circular opening 2b: Inwardly loose projecting portion 2c: Inner cylindrical portion 2d: Upper vertical rib-like portion 2e: Annular locked taper portion 2f: Rib-like portion 2g: annular top surface part

(Used in FIGS. 1 to 12: 3 ′ and 3e are used only in FIGS. 6 to 8)
3, 3 ': sheath-like discharge valve member 3a: annular outwardly loose projecting portion 3b: longitudinal notch for passing liquid contents 3c: annular inner surface gentle projecting portion 3d: annular reverse skirt portion 3e: Lower vertical rib-shaped portion 4: Suction valve member 4a: Circular suction valve 4b: Arc-shaped elastic piece portion 4c: Cutout portion 4d for passing liquid contents: Ring-shaped convex portion 4e: An annular outer surface Loose projection

(Used in FIGS. 1-8)
5: Cover body 5a: Inflow hole 5b: Annular valve action part 5c: Cylindrical inner upright part 5d: Annular concave part 5e: Vertical notch part 5f: Annular locking taper part 6: Bellows Element

(Used in FIGS. 9 to 11)
7: Cover body 7a: Inflow hole 7b: Annular valve action part 7c: Cylindrical inner standing part 7d: Ring concave part 7e: Vertical notch part 7f: Cylindrical intermediate standing part 7g: Annular Locking taper portion 8: cylindrical seal member 8a: upper reverse skirt portion 8b: lower skirt portion

(Used in FIGS. 6 to 11)
9: Coil spring

(Used in FIGS. 1 to 11)
10: Container body 10a: Hole for inflow of outside air 11: Movable bottom member (seal member)
11a: Reverse skirt portion A: Storage space area for liquid contents inside the container body B: Storage space area for holding liquid contents to be discharged next

Claims (10)

Immediately after the release of the liquid content discharge operation of the operation member, the back suction action is performed on the residual liquid content on the discharge port side by the valve action between the operation member and the discharge valve member and the action of the operation member return operation unit. In the pump mechanism exhibiting
The operating member is
An opening on the discharge port side;
In the liquid content discharge operation, it has an interlocking action part that contacts the discharge valve member and drives it in the operation direction of the discharge operation,
The discharge valve member is
An independent movable member different from the operation member,
Having a valve action part that exhibits an opening and closing action between the opening part according to the liquid content discharge operation to the operation member and the release thereof;
The operation member and the discharge valve member are
During the liquid content discharge operation,
First, the opening part of the operation member is separated from the valve action part, and then the interlocking action part drives the discharge valve member in the operation direction,
When releasing the liquid content discharge operation,
First, based on the return action of the operating member return operating portion, the operating member is in a direction opposite to the operating direction while the portion between the opening portion and the valve operating portion is open with respect to the discharge valve member. By moving, the back suction action is exhibited, and then the operation member and the discharge valve member are returned to the stationary mode in conjunction with the intermediate portion being closed based on the return action.
Consisting of structure,
A pump mechanism with a back suction function. A cover body is attached to the container main body for storing the liquid content, and has a cover body for setting a storage space area for the liquid content together with the container main body.
The cover body is
A hole into which the liquid content of the housing space flows, and
A first annular upright portion that is formed around the hole portion and has a function of holding at least the discharge valve member at the bottom dead center position by a frictional action therewith,
The discharge valve member is
At least at the bottom dead center position, the first annular upright portion is in contact with the inner peripheral surface, and has a held portion that is held in this contact state by frictional force with the inner peripheral surface.
A pump mechanism having a back suction function according to claim 1. Attached to the inside of the first annular upright portion, the outer peripheral surface portion guides the movement of the discharge valve member in the operation direction and the reverse direction, and has a valve function for the hole portion. Having a suction valve member,
A pump mechanism having a back suction function according to claim 2. The operating member is
It has an annular upper surface part to be operated,
The inner opening portion of the annular upper surface portion is formed of a cylindrical member that acts as an opening portion on the discharge port side.
A pump mechanism having a back suction function according to any one of claims 1 to 3. One and the other end are attached to the operation member and the cover body, respectively, to set a liquid content storage space area from the suction valve in a state where the hole is closed to the opening, and the operation It has a cylindrical bellows member that can act as a member return operation part,
A pump mechanism having a back suction function according to any one of claims 2 to 4. The suction valve member is
It consists of the cylindrical part in which the said suction valve which acts with respect to the said hole part was formed, and the liquid content passage 1st from the inside of a cylindrical part to the exterior of a cylindrical part is formed in the side part by the side of the suction valve. It is a cylindrical member provided with a through portion,
The discharge valve member is
The side of the bottom side is formed by a bottomed cylindrical portion whose opening side is guided by the outer peripheral surface of the suction valve member and forms a downstream inner space region continuous from the upstream inner space region of the suction valve member. And a bottomed cylindrical member provided with a second penetration part for passing the liquid content from the inside of the bottomed cylindrical part to the outside of the bottomed cylindrical part,
As a liquid content passage area from the suction valve portion to the opening portion,
A first passage area extending from the upstream internal space area through the downstream internal space area to the second penetrating portion and the opening portion ahead of the second penetrating section;
A second passage area extending from the second penetrating portion to the opening through the external space area between the suction valve member and the discharge valve member and the bellows member is set.
A pump mechanism having a back suction function according to claim 5. A second annular upright portion formed outside the first annular upright portion of the cover body;
A liquid content reservoir attached to the operating member and exhibiting a sealing action between the inner peripheral surface of the second annular upright portion and the opening portion from the suction valve with the hole closed. A cylindrical movable member for setting a space area;
A pump mechanism having a back suction function according to any one of claims 2 to 4. The suction valve member is
It consists of the cylindrical part in which the said suction valve which acts with respect to the said hole part was formed, and the liquid content passage 1st from the inside of a cylindrical part to the exterior of a cylindrical part is formed in the side part by the side of the suction valve. It is a cylindrical member provided with a through portion,
The discharge valve member is
The side of the bottom side is formed by a bottomed cylindrical portion whose opening side is guided by the outer peripheral surface of the suction valve member and forms a downstream inner space region continuous from the upstream inner space region of the suction valve member. And a bottomed cylindrical member provided with a second penetration part for passing the liquid content from the inside of the bottomed cylindrical part to the outside of the bottomed cylindrical part,
As a liquid content passage area from the suction valve portion to the opening portion,
A first passage area extending from the upstream internal space area through the downstream internal space area to the second penetrating portion and the opening portion ahead of the second penetrating section;
The second penetrating portion passes through the external space between the suction valve member and the discharge valve member, the second annular upright portion, and the cylindrical movable member, and reaches the opening portion. Aisle area is set,
A pump mechanism having a back suction function according to claim 7. An elastic member that is disposed in a space area outside the passage area of the liquid content in a manner isolated from the passage area and acts as the operation member return operation portion by urging the operation member in the reverse direction. Having
A pump mechanism having a back suction function according to any one of claims 1 to 8. Comprising the pump mechanism according to any one of claims 1 to 9, and containing a liquid content to be released;
This is a pump-type product.

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