WO2004043610A1

WO2004043610A1 - Pump unit and container

Info

Publication number: WO2004043610A1
Application number: PCT/JP2003/014205
Authority: WO
Inventors: Akira Mizuochi; Kiyoshi Chikashige
Original assignee: Advanex Inc.
Priority date: 2002-11-14
Filing date: 2003-11-07
Publication date: 2004-05-27
Also published as: EP1561512B1; JP3986947B2; JP2004160387A; EP1561512A4; AU2003301898A1; EP1561512A1

Abstract

A pump unit (10) that pumps out a liquid in a container body (12) has a liquid-receiving portion and a piston portion movably inserted in the liquid-receiving portion. The piston portion has a shaft case (20) provided in the liquid-receiving portion and having a female screw portion (20a) formed on its inner periphery, and a piston head portion (21, 22) movably inserted in the shaft case. The piston head portion projects outside the liquid-receiving portion, a discharge opening (22c) is formed at the projecting portion, and a male screw portion (21a) screwed in the female screw portion (20a) is formed on the outer periphery of the piston head portion. A non-screw portion (20b) that allows the male screw portion of the piston head portion to freely rotate in a circumferential direction of the shaft case is formed on the shaft case. In this pump unit, the discharge opening of the piston head portion can be freely rotated separately from movement in discharge operation of the liquid in the container body.

Description

Description Pump unit and container Technical field

The present invention relates to a pump unit and a container used for a pump-type container such as a hair wash used at home, for example.

Background art

2. Description of the Related Art Conventionally, pump-type containers have been used as containers for accommodating, for example, hair washes and detergents used at home. The pump-type container includes a container body and a pump unit removably inserted into the container body. Usually, when the piston unit is pressed, the piston unit returns and the liquid is sucked up from the container body, and when the piston unit is pressed again, the liquid is discharged from the discharge port of the piston unit. I have.

In this type of pump unit, the bellows (bellows tube) that contracts when the piston part is pressed draws liquid into the bellows using a return operation that expands again when you release your hand, and further presses the piston part. In some cases, the bellows is contracted and the liquid in the bellows is discharged from a discharge port (for example, Japanese Patent Application Laid-Open Nos. H10-110-115 and H10-102-1947). See).

In order to suck up liquid into the bellows or discharge liquid from inside the bellows in response to such pressing and returning operations of the biston, suction and discharge valves are provided on the upstream and downstream sides of the bellows. Is provided.

By the way, with regard to containers as products, it is desired that the direction of a discharge port for discharging a liquid can be freely changed, particularly in a state of use. This means, for example, that if this container is a container for household shampoo, when using this container, it is usually not necessary to lift it up, but to leave it on its head only Is operated to discharge the liquid. .

Also, apart from such a request, when the container falls, the suction valve and the discharge valve If the is opened, there is a problem that the liquid flows out from the discharge port to the outside. Conventionally, in order to solve such a problem, the bellows is pressed down by pressing down the piston part, especially when not in use during transportation or storage, and then packed and stored in that state.

However, as described above, if the piston part is pressed down for a long time and the bellows is kept compressed, the bellows will be loosened, and the bellows will not be compressed by the piston part when used. The bellows may not return sufficiently, and as a result, the liquid may not be sufficiently sucked, which may cause a disadvantage that the operability is significantly reduced.

The present invention has been made in view of the above circumstances, and allows the direction of the discharge port to be freely changed at the time of use. It is an object of the present invention to provide a pump unit and a container that prevent a decrease in operability due to compression over a long period of time. Disclosure of the invention

In the pump cut of the present invention, the liquid storage section inserted into the container body and the liquid storage section are movably inserted into the liquid storage section to reduce the volume in the liquid storage section so that the liquid storage section moves from the liquid storage section to the liquid storage section. A piston section for discharging the liquid out of the container body and expanding the volume in the liquid storage section to allow the liquid in the container body to flow into the liquid storage section; and wherein the piston section is A shaft case provided in the liquid storage portion and having a female screw portion formed on an inner peripheral surface thereof; a discharge port protruding outside of the liquid storage portion to form a discharge port here; A male screw part formed to be screwed into the shaft part, and a screw head part movably inserted into the shaft case. The male screw part of the biston head part is formed on the shaft case by the shaft case. Non-screw that can rotate around the case That was formed was used as a solution to the above problems.

According to this pump unit, since the external thread of the biston head is engaged with the internal thread of the shaft case, simply pressing this without rotating the button head results in The piston head part and the shaft case move as a body, and the volume in the liquid storage part is reduced. Therefore, the piston head By the pressing operation of the part, it is possible to discharge the liquid from the liquid storage part to the outside of the container body through the discharge port.

In addition, since the non-threaded portion is formed in the shaft case, the piston head can be idled in the shaft case. Therefore, it is possible to rotate the biston head portion without moving the shaft case, that is, without increasing or decreasing the volume of the liquid storage portion, and as a result, separate from the operation of discharging the liquid in the container body. It is possible to freely rotate the outlet of the biston head.

Further, in the pump unit, a resin urging member (made of resin) for urging the shaft case in a direction in which the shaft case is moved back in a direction to reduce the volume in the liquid storage portion when the shaft case is moved in the direction to reduce the volume in the liquid container. (Including a panel-like body that can return in the extending direction).

With this configuration, the pressure is applied to the shaft case by the urging member by pressing the biston head portion to reduce the volume in the liquid storage portion and then releasing the pressure to the biston head portion, This also returns the piston head to its original position. Therefore, when it is desired to discharge the liquid further, the liquid can be discharged by pressing the biston head again after the recovery.

In addition, when the biston head is rotated to screw the male thread of the biston head into the female thread of the shaft case, only the piston head is moved without moving the shaft case, for example, into the shaft case. It becomes possible to store. Therefore, for example, when the pump unit is transported in a state of being assembled in the container body, the biston head can be housed in the shaft case to make the whole compact and can be packed as it is. Further, at this time, since only the biston head is moved without moving the shaft case, the resin-made urging member exerts a compressive force against the urging force for a long time during the above-mentioned packing or the like. By continuing to receive the tires, fatigue and backlash are prevented beforehand, and a decrease in operability is prevented.

Further, in the container of the present invention, the provision of the pump unit is a means for solving the problem.

According to this container, the discharge outlet of the biston head can be freely rotated separately from the operation of discharging the liquid in the container main body. This also prevents a drop in operability. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a side sectional view showing a schematic configuration of an embodiment of a container provided with a pump unit of the present invention.

FIG. 2A is a side sectional view of the shaft case.

FIG. 2B is a side sectional view of the shaft case.

FIG. 3 is a cross-sectional plan view of a main part for describing a mechanism for preventing rotation of a shaft case from a chalet.

FIG. 4A is a side sectional view illustrating a state in which the piston ring forms a discharge valve and illustrating a state in which the valve is closed.

FIG. 4B is a side sectional view showing a state in which the piston ring forms a discharge valve to explain a mechanism forming the discharge valve.

Fig. 5 is a cross-sectional view of the essential parts of the piston shaft and piston head. "

FIG. 6 is an enlarged view of a main part of the container shown in FIG. 1, for explaining the engagement of the second engagement portion with the first engagement portion.

FIG. 7 is a side sectional view showing a state in which liquid leakage is prevented when the container shown in FIG. 1 is not used, for example, during transportation.

FIG. 8 is a side sectional view for explaining a use state of the container shown in FIG. FIG. 9 is a side sectional view showing a schematic configuration of another embodiment of the container provided with the pump unit of the present invention.

FIG. 10 is an enlarged view of a main part of the container shown in FIG. 9, and is a view for explaining an on-off valve for closing an air hole. '

FIG. 11 is a side cross-sectional view showing a state in which liquid leakage is prevented when the container shown in FIG. 9 is not used, such as during transportation.

FIG. 12 is a side sectional view for explaining a use state of the container shown in FIG. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a container provided with the pump unit of the present invention. In FIG. 1, reference numeral 10 denotes a pump unit, and 11 denotes a container. The container 11 is configured such that a pump body 10 is attached to a container body 12 in which a liquid hair washing agent or the like is stored. The container body 12 is a cylindrical member with a bottom formed of a synthetic resin, and has a mouth 12 a formed at an upper end thereof, and a male thread 13 formed at an outer periphery of the mouth 12 a. Have been. A synthetic resin screw cap 15 having a female screw part 14 to be screwed into the male screw part 13 is detachably attached to the mouth part 12a. This screw cap 15 The pump unit 10 is attached to the container body 12. In other words, a hole (not shown) is formed in the center of the screw cap 15, and a pipe-shaped case 16 made of a synthetic resin is inserted into the hole, so that the pump unit 10 is screwed into the screw cap. It is attached to the container body 12 via 15. Note that the case 16 functions as the liquid container in the present invention. A flange 16 a is formed on the outer peripheral portion of the case 16, and the flange 16 a is in contact with the inner surface (lower surface) of the screw cap 15. A packing 17 is provided on the lower surface side of the flange 16a. The inner surface (lower surface) of the screw cap 15 and the upper edge of the opening 12a are provided through the packing 17 through the packing 17. , Airtightly pressed. A case 18 is attached to a portion of the case 16 protruding above the screw cap 15. The cylinder 18 has an outer cylindrical portion 18a fitted to the outer peripheral portion of the case 16, an inner cylindrical portion 18b inserted into the case 16, and a cylindrical portion 18b. And a top portion 18c formed immediately above. Then, this chip plate 18 is attached to the upper end portion of the case 16, and the screw cap 15 is sandwiched between the outer cylindrical portion 18 a and the flange 16 a of the case 16, thereby forming the case 16. Is fixed to the screw cap 15.

The pump unit 10 includes a case 16, a synthetic resin bellows 19 inserted into the case 16, a shaft case 20 connected to the bellows 19, and a piston shaft 21. And an intake piston 22 and a suction pipe 23. The shaft case 20, the piston shaft 21, and the piston head 22 constitute a piston portion in the present invention, and the piston shaft 21 and the piston head are formed. The groove 22 constitutes the biston head in the present invention.

The suction pipe 23 is inserted into the container body 12, and is installed at the lower end of the bellows 19. The suction end 23 a located at the lower end of the suction pipe 23 is obliquely pressed.

The upper end side of the suction pipe 23 is inserted into a connecting pipe 16 b formed outside the bottom of the case 16. A suction valve 24 is provided in the connecting pipe 16b to allow only the liquid to flow from the container body 12 to the case 16 side. The suction valve 24 is disposed at the bottom of the case 16, a valve chamber 25 integrally formed with the connecting pipe 16 b, a spherical valve element 26 housed in the valve chamber 25. And a cover member 27. At the bottom of the valve chamber 25, an opening 25a communicating with the suction pipe 23 side is formed, and the liquid in the container body 12 flows from the opening 25a through the suction pipe 23 via the suction pipe 23. It flows into 25.

The valve element 26 is housed in the valve chamber 25 from the upper opening side of the case 16, and the outer peripheral surface thereof is in close contact with the inner peripheral surface of the valve chamber 25 on the opening 25 a side. To prevent The valve body 26 is not limited to a spherical shape and may be of various shapes as long as it can close the opening 25a of the valve chamber 25.

The lid member 27 is a disc-shaped member formed with a larger diameter than the upper opening of the connecting pipe 16 b, that is, the upper opening of the valve chamber 25, and covers the upper opening of the valve chamber 25. In addition, an opening 27a is formed, which allows the passage of the liquid and prevents the passage of the valve body 26. The shape of the opening 27a may be, for example, a shape cut out in a cross shape. Of course, the shape is not limited to this, and various shapes can be adopted. The lid member 27 can be fixed to the bottom of the case 16 by mechanical means such as fitting or by bonding or welding, so that the valve element 26 comes out of the valve chamber 25 unexpectedly. It is preferable to prevent this.

The bellows 19 is fixed to the lid member 27. The bellows 19 is a member that is inserted into the container body 12 together with the case 16 and sucks out the liquid in the container body 12 to the outside of the container body 12, and is an example of a panel body in the present invention. is there. The bellows 19 is a bellows-shaped member formed in the case 16 so as to expand and contract in its length direction (up and down direction), thereby being able to return in the extending direction. The end is fixed to the lid member 27 as described above, and communicates with the inside of the valve chamber 25 and the suction pipe 23 through the opening 27a. The bellows 19 is made of low-density polyethylene, has a predetermined panel constant, and is easily compressed by being pressed, so that the internal volume is reduced. On the other hand, when the pressing force is released, it easily returns to the original state, that is, the extending direction, and the inside volume increases. In other words, when the volume inside the case 16 is reduced by the biston portion, the volume inside the bellows 19 is also reduced, and conversely, when the volume inside the case 16 is expanded, the volume inside the bellows 19 is also expanded. Is done.

A cylindrical press-fit portion 19a is formed on the upper end side of the bellows 19, and the press-fit portion 19a is inserted from below into a synthetic resin-made bistone base 29 having a closed cylindrical shape. The biston base 29 is provided with a first communication hole 30 that allows communication between the inside of the bellows 19 and the inside of the case 16. The first communication hole 30 is for allowing the liquid sucked into the bellows 19 from the container body 12 to once flow out of the bellows 19 as described later. The shape and dimensions of the first communication holes 30 are not particularly limited as long as the flow of the liquid is not hindered, and the number thereof is also arbitrary.

The piston base 29 has a smaller diameter than the inner diameter of the case 16, and has a concave portion (not shown) formed on the lower surface thereof to be fitted to the press-fit portion 19 a, and a upper upper portion of the outer peripheral portion thereof. An annular groove (not shown) that fits into the lower end of the foot case 20 is formed. The shaft case 20 is a pipe-shaped member made of synthetic resin. The lower end of the shaft case 20 is sealed by fitting the lower end thereof to the piston base 29, and the upper end of the shaft case 18 is formed inside the chain plate 18. By passing through the cylinder 18 b, it is fixed to the cylinder 18. As shown in FIGS. 2A and 2B, a female screw portion 20a is formed on the inner peripheral surface of the shaft case 20, and the upper end portion of the inner peripheral surface of the shaft case 20, that is, the female screw portion 2 is formed. Above the position where 0a is formed, a non-threaded portion 20b is formed. The female thread 20a is screwed and mated with the male thread 21a of the biston shaft 21 described later, and the non-thread 2Ob is a groove along the inner circumferential surface of the shaft case 20 along the circumferential direction. The piston shaft 21 is rotatably supported in the circumferential direction without interfering with the male screw portion 21 a of the piston shaft 21.

FIG. 2A shows a case where the shaft case 20 is formed as a body. Ma Fig. 2B shows that the upper end side where the non-threaded portion 20b is formed and the lower side where the female threaded portion 20a is formed are formed separately, and these are mechanically connected by forced fitting or the like, or The figure shows a case where they are integrated by bonding or welding. In these drawings, a second communication hole 34 described later is omitted.

At the upper end of the shaft case 20, there is a first engaging portion slightly extending inward.

The 20 c force is formed along the circumferential direction of the shaft case 20. As will be described later, the first engagement portion 20c is formed so as to extend slightly inside the top portion 18c of the chair 18.

As shown in FIG. 1, a ridge 31 is formed on the outer periphery of the shaft case 20 along the length direction of the shaft case 20. As shown in FIG. 3, the ridge 31 fits into a groove 32 formed in the inner cylinder 18b of the chip plate 18, and turns the screw head 22 as described later. In this case, it functions as a detent so that the shaft case 20 does not rotate in conjunction with it. Here, the ridge 31 is movable in the length direction of the groove 32, and therefore, the lifting and lowering of the shaft case 20 accompanying the pressing operation of the piston head 22 described later is performed by these protrusions. It is not hindered by the fitting of Article 31 and groove 32. In FIG. 3, one ridge 31 is formed on the shaft case 20, and one groove 32 is formed on the inner cylinder 18b of the chip plate 18 in response to this. The number is not particularly limited, and may be two or more.

In addition, a protruding part is provided along the circumferential direction at almost the middle of the outer periphery of the shaft case 20.

3 3 are formed. The projecting portion 33 may be entirely continuous or may be formed intermittently as long as the projecting portion 33 is formed avoiding the projecting ridge 31 so as not to interfere with the projecting ridge 31.

The lower end of the shaft case 20 is provided inside the case 16 and the shaft case.

A second communication hole 34 for communicating the inside of 20 is provided. The second communication hole 34 is for allowing the liquid that has flowed out of the bellows 19 and stored in the case 16 to flow into the shaft case 20 as described later. The second communication hole

Like the first communication hole 30, the shape and size of 34 are not particularly limited as long as they do not hinder the flow of the liquid, and the number and number thereof are also arbitrary. An annular piston ring 35 is attached to the outer periphery of the lower end of the shaft case 20. The piston ring 35 is disposed between the protrusion 33 and the peripheral edge 29 a of the biston base 29, and includes an inner ring 35 a located on the shaft case 20 side and a case 16. The outer ring 35b located on the side is integrally connected at the center in the vertical direction. The upper part of the inner ring 3 5a is the shaft case

20 so as to slide easily, and the lower part of the inner ring 35a is the second communication hole

It is formed thinner than the upper part so as not to block 34. Further, the outer ring 35 b is in close contact with the inner peripheral surface of the case 16 so as to ensure sufficient liquid tightness and is slidable. In particular, the upper and lower ends of the outer ring 35 b The lip is formed with a lip portion (not shown) so that the above-described liquid-tightness and sliding are improved.

Here, in the normal state shown in FIGS. 1 and 4A (in a state where the piston head 22 is not pressed), the distance between the protruding portion 33 and the peripheral edge 29 a of the piston base 29 is determined by a screw. It is sufficiently wider than the height of the inner ring 35 a of the ton ring 35. Further, in this state, the piston ring 35 is pressed against the peripheral edge 29 a of the biston base 29, and as a result, the second communication hole 34 becomes the inner ring 35 of the piston ring 35. Liquid-tightly closed by a. By closing the second communication hole 34 in a liquid-tight manner with the piston ring 35 and the piston base 29 in this way, or opening the second communication hole 34 as described later, these screws are formed. The ton ring 35 and the biston base 29 function as a discharge valve for discharging the liquid.

As shown in FIG. 1, the case 16 has an air hole 36 formed above the position where the piston ring 35 is most raised. The air hole 36 is used to connect the container body 12 內 to the gap between the case 16 and the inner cylinder 18b of the chair plate 18, and the outer cylinder 18 of the case 16 and the chest 18. It is for communicating with the outside through a gap between the container body a and the so-called “dent” due to a change in the liquid volume in the container body 12.

The upper part of the case 16 where the piston ring 35 moves is larger in diameter than the lower part where the bellows 19 is accommodated.

The piston shaft 21 communicates with the shaft case 20 and is a cylindrical member made of synthetic resin inserted from above so as to be movable to the bracket. As shown in FIG. A male screw portion 21a is formed at a lower end portion.

The male screw portion 21a is screwed into the female screw portion 20a formed in the shaft case 20, and the non-thread portion 2Ob is rotatable in its circumferential direction. That is, the biston shaft 21 can be relatively moved with respect to the shaft case 20 by screwing the male thread 21 a into the female thread 20 a, and the male thread 21 a is female threaded. By rotating at the non-threaded portion 20b without screwing into the portion 20a, the shaft case 20 rotates idly without moving.

Further, a second engagement portion 21b is formed slightly above the male screw portion 21a of the biston shaft 21. The second engaging portion 2 lb is formed of a ridge protruding outward from the outer peripheral surface of the piston shaft 21 and formed along the circumferential direction thereof, and is formed by the first engaging portion 2 of the shaft case 20. It is configured to detachably engage with 0c. That is, as shown in FIG. 6, the second engagement portion 2 lb raises the piston head 21 to the highest position, and arranges the male thread portion 21 a in the non-thread portion 20 b of the shaft case 20. When in use, the first engaging portion 20c rides on the first engaging portion 20c and is engaged with the first engaging portion 20c. Further, at this time, the piston head 21 has the male screw portion 21a located below the first engagement portion 20c, and as a result, the piston head 21 has the second engagement portion 21b. The first engagement portion 20c is sandwiched between the male screw portion 21a. In this configuration, when the piston head 21 is pulled up to the shaft case 20 to be used, the liquid tightness between the upper opening of the shaft case 20 and the biston shaft 21 is ensured. Is done.

As described above, the inner edge of the top portion 18c of the chain 18 is slightly recessed from the edge of the first engagement portion 20c, so that the second engagement portion 21b Does not interfere with

A small diameter connecting pipe 21c is formed at the upper end of the piston shaft 21 as shown in FIG. 1, and a biston head 22 is connected to the connecting pipe 21c. I have. The biston head 22 is integrally connected to the connecting pipe 21c, and includes a head body 22a and a discharge pipe 22b communicating with the biston shaft 21. The head body 22 a is detachably fitted to the outer cylindrical portion 18 a of the chip plate 18. The discharge pipe 22 b communicates with the piston shaft 21, and the discharge pipe 22 b The liquid in the container body 12 is discharged from the outlet 22.

Next, a method of using the container 11 including the pump unit 10 having the above configuration will be described.

When not in use, such as during transportation or storage, slightly push down the piston head 22 in advance from the state shown in Fig. 1 and unscrew the lower end of the male thread 21 a of the biston shaft 21. The piston 20 is moved from the portion 20b to the female screw portion 20a, and the piston 21 is rotated in this state. Then, the screw shaft 21 moves to the bellows 19 side in the shaft case 20 by the engagement of the male screw portion 21 a with the female screw portion 20 a, and the second engagement of the screw shaft 21 is performed. The portion 21b descends over the first engagement portion 20c. Then, as the movement (downward) proceeds further, the piston shaft 21 is housed in the shaft case 20 as shown in FIG. Further, the piston head 22 is fitted to and covers the outer cylindrical portion 18a of the chair plate 18.

As a result, the piston shaft 21 and the biston head 22 are contracted, so that the container 11 is easily packed. Further, in this state, the piston head 22 is not further pressed, so that the liquid inside is not forcibly sent out. Further, since the button shaft 21 is accommodated in the shaft case 20 without pushing down the shaft case 20, the bellows 19 maintains an expanded state without being compressed. Therefore, there is no problem such as sag due to continuous compression for a long time.

In this state, since the second communication hole 34 is closed by the piston ring 35, the inside of the case 16 and the bellows 19 side and the shaft case 20 side do not communicate with each other. Even if 11 falls over, the liquid in the container body 12 and the bellows 19 does not flow out of the discharge pipe 22 b through the shaft case 20.

Furthermore, since the piston shaft 21 is not exposed to the outside, the piston shaft 21 is not contaminated. Next, in order to put the container 11 in the state shown in Fig. 7 in use, rotate the piston head 2 2 so that the male screw part 21 a of the screw shaft 21 is in the shaft case. It is raised along the 20 female thread 20 a. Then, the second engagement portion 21b of the piston shaft 21 passes through the non-threaded portion 20b and the first engagement portion 20c of the shaft case 20. Over it and move to its upper side to engage here.

As a result, the piston shaft 21 and the shaft case 20 are integrated, and the container 11 is in a use state as shown in FIG. At this time, as described above, the first engagement portion 20c of the shaft case 20 is sandwiched between the second engagement portion 21b of the piston head 21 and the male screw portion 21a, so that these screws are formed. The tonhead 21 and the shaft case are integrated, and the liquid tightness between them is further ensured.

In addition, since the male screw portion 21 of the screw shaft 21 is still located within the non-threaded portion 20b, simply rotating the screw head 22 without pressing it causes the shaft 2 1 (piston head 2 2) spins freely without interference from the shaft case 20.

Then, in this state, as shown in FIG. 8, when the piston head 22 is pushed down, the external thread 21 a of the piston shaft 21 is engaged with the female thread ¾ 0 a of the shaft case 20, The piston shaft 21 and the shaft case 20 move together, and the shaft case 20 descends to compress the bellows 19.

When the piston head 22 is pressed in this way, as shown in FIG. 4B, the shaft case 20 and the biston base 29 are lowered, and the piston ring adhered to the inner surface of the case 16. 3 Downward shift to 5 Then, the lower end of the inner ring 35 a of the piston ring 35 is separated from the peripheral edge 29 a of the biston base 29, so that the second communication hole 34 is opened, and the inside of the case 16 is opened. And the inside of the shaft case 20 communicate with each other. Since the projection 33 is formed in the shaft case 20, if the piston head 22 continues to be pressed after the second communication hole 34 is opened, the piston 33 is formed by the projection 33. The inner ring 35 a of the ring 35 is pushed down integrally with the shaft case 20.

When the shaft case 20 is depressed in this way, the air in the bellows 19 is compressed and the suction valve 24 is closed. As a result, the air in the bellows 19 flows through the first communication hole 30. It flows into the case 16, further flows into the shaft case 20 through the second communication hole 34, and is discharged outside through the hole of the piston shaft 21 and the discharge pipe 22 b.

Subsequently, when the pressure on the piston head 22 is released, the bellows 19 extends in the extending direction. Then, the pressure in the bellows 19 becomes negative by returning to the state shown in FIG. At this time, as the bellows 19 returns in the extension direction, the piston base

As a result, the piston ring 35 is pushed up to the biston base 29. Then, the peripheral portion 29a of the piston base 29 comes into close contact with the inner ring 35a of the piston ring 35, and the second communication hole 34 is closed again.

At this time, the lower end of the inner cylindrical portion 18 b of the chalet 18 makes the piston ring

The inner ring 3 5a is regulated so that the rise of the inner ring 3 5a does not occur more than necessary.As a result, the close contact between the peripheral edge 29a of the screw ton base 29 and the inner ring 35a is sufficiently ensured. You.

Also, when the piston ring 35 and the piston base 29 rise as described above and the second communication hole 34 is closed, the liquid formed by the space inside the case 16 and outside the bellows 19 is formed. The reservoir 16 c also has a negative pressure as in the bellows 19 due to the increase in its volume.

When the pressure in the reservoir 16c and the bellows 19 becomes negative in this way, the valve body 26 of the suction valve 24 rises and the suction valve 24 opens, thereby sucking from the container body 12. The liquid is sucked into the bellows 19 through the filling pipe 23 and the inside of the bellows 19 is filled with the liquid.

Subsequently, when this pressing operation is repeated, the suction valve 24 is closed, thereby preventing the liquid in the bellows 19 from flowing back to the container body 12 side, whereby the liquid in the bellows 19 is liquid. Outflow into reservoir 16c. Further, a liquid newly flows into the bellows 19 from the container body 12. 'Thereafter, as shown in Fig. 8, when the piston head 22 is pressed again, the suction valve 24 is closed, and the liquid in the liquid reservoir 16c and the liquid in the bellows 19 are moved to the container body 12 side. Backflow is prevented. The liquid in the liquid reservoir 16 c and the bellows 19 where backflow to the container body 12 is prevented is discharged into the hole of the piston shaft 21, the discharge pipe 2 2 b, and the discharge port 2 2 c Is discharged to the outside. At this time, the liquid in the bellows 19 is pushed out by a single pressing operation of the piston head 22, and at the same time, the liquid storage part 16 c in the case 16 is made up of the piston ring 29 and the piston ring 29. Since the volume of the liquid is reduced and the liquid in the liquid reservoir 16c is also pushed out, it is possible to discharge a larger amount of liquid than before. You That is, as compared with the case where the discharge is performed only by the compression force of the bellows i9, a larger amount of liquid is discharged as the volume of the liquid reservoir 16c is reduced.

Subsequently, when the pressure on the piston head 22 is released, the bellows 19 returns as described above, and the inside of the bellows 19 becomes negative pressure, and at the same time, the liquid reservoir 16c also becomes negative pressure. As a result, the liquid is sucked into the bellows 19 from the container body 12 and into the liquid reservoir 16c from inside the bellows 19, and the liquid is sucked into the liquid reservoir 16c and the bellows 19, respectively. Are each filled with liquid. At this time, the piston base 29 adheres tightly to the inner ring 35a of the piston ring 35, so that the second communication hole 34 closes, so that the piston head 22 enters the container body 12 from the side. Backflow of the liquid is prevented.

In the above operation, since the inside of the container body 12 communicates with the outside of the container 11 through the air hole 36, when the liquid is discharged from the inside of the container body 12, the volume corresponding to that amount is reduced. Corresponding air flows in from the outside. As a result, the occurrence of “dents” in the container main body 12 is prevented, and the shape of the container main body 12 is always maintained almost in the original shape.

In such a pump unit 10 and the container 11 using the pump unit 10, the non-threaded portion 20b is formed in the shaft case 20, so that the piston shaft 21 can be caused to idle inside the shaft case 20. Can be. Therefore, the biston head 22 can be rotated without moving the shaft case 20, that is, without compressing the bellows 19. As a result, apart from the operation of discharging the liquid in the container body 12, the direction of the discharge port 22 c of the biston head 22 can be freely rotated, so that the container 1 1 (pump unit 10 ) Is easier to use.

Also, since only the piston head 22 and the biston shaft 21 can be moved without moving (depressing) the shaft case 20, the resin bellows 19 is compressed even during packing. And maintain the stretched state. In addition, since the first communication hole 30 is provided in the press-fit portion 19 a at the upper part of the bellows 19 and the second communication hole 34 is provided in the shaft case 20, the first communication hole 30 and the second communication hole 30 are provided. The hole 34 allows the bellows 19 and the shaft case 20 to communicate with each other via the liquid reservoir 16 c in the case 16. Therefore, the liquid sucked into the bellows 19 is stored not only in the bellows 19 but also in the liquid reservoir 16c, and as a result, the liquid is stored in the bellows 19 and the liquid reservoir 16c. After that, press the button head 2 2 Then, by compressing the bellows i 9, the liquid in the bellows 19 is pushed out, and at the same time, the volume of the liquid reservoir 16 c is reduced and the liquid in the liquid reservoir 16 c can also be pushed out. Therefore, as compared with the case where the discharge is performed only by the compression force of the bellows 19, a larger amount of liquid can be discharged by an amount corresponding to the reduced volume of the liquid reservoir 16c.

Further, by engaging the second engagement portion 21 b of the biston shaft 21 with the first engagement portion 20 c of the shaft case 20, the biston shaft 21 and the shaft case 20 are engaged. Can be made liquid-tight, so even if the container 11 is accidentally turned over during use, the liquid in the container body 12 will be between the biston shaft 21 and the shaft case 20. Is prevented from leaking out.

In the present embodiment, a resin bellows 19 is used as a member for urging the shaft case 20 in the direction of reducing the volume in the case (liquid storage portion) 16 when the shaft case 20 moves in the direction of reducing the volume. However, in this embodiment, the liquid is stored not only in the bellows 19 but also in the liquid reservoir 16 c of the case 16, so that, for example, a resin material is used instead of the bellows 19. The liquid from the suction pipe 23 may directly flow into the liquid reservoir 16c using a coil spring (biasing member). Further, as the spring body in place of the bellows 19, a body having any other structure, that is, a cylindrical body having a return force (biasing force) equivalent to a panel may be used.

FIG. 9 shows another embodiment of a container provided with the pump unit of the present invention. In FIG. 1, reference numeral 40 denotes a pump unit, and reference numeral 41 denotes a container. In the pump unit 40 and the container 41 shown in FIG. 9, the same components as those of the pump unit 10 and the container 11 shown in FIG. 1 are denoted by the same reference numerals and the description thereof is omitted. I do. The main difference between the pump unit 40 and the container 41 shown in Fig. 1 is that the pump unit 10 and the container 11 shown in Fig. 1 use the pump unit 10 shown in Fig. 1 to temporarily transfer the liquid from inside the bellows 19 to the case. After flowing out into the liquid reservoir 16c of 16 and flowing into the shaft case 20, the pump case 40 shown in Fig. 9 has the shaft case 20 directly from inside the bellows 42. The point is that the liquid is allowed to flow into 43. That is, in the pump unit 40 and the container 41, the valve stem 44 is disposed in the case 16 above the connecting pipe 16b. The valve stem 44 is a rod-shaped member extending upward from the bottom side of the case 16 (the side of the connection pipe 16b). A liquid passage hole 44a communicating with 6b is formed, and a valve portion 44b bulging outward is formed at the upper end. Further, on the bottom side of the valve stem 44, a closed cylindrical fixing portion 44 c for fixing the valve stem 44 to the inner surface of the case 16 is formed, and the fixing portion 44 c has a bellows 4. The lower end of 2 is fixed. The hole formed in the fixed part 44 c (liquid passage hole 44 a) has a smaller diameter than the spherical valve element 26 of the suction valve 24, and the valve element 26 escapes upward from the valve chamber 25. Has been prevented.

The bellows 42 is a helical low-density polyethylene member that expands and contracts in its length direction (vertical direction) in the case 16 so that it can return to its extending direction. By inserting the valve stem 44, it is connected to the suction pipe 23 through the liquid passage hole 44 a of the valve stem 44 and the connecting pipe 16 b. The base 42 compresses easily by being pressed, reduces the internal volume, and when the pressing force is released, returns to its original state, that is, the extension direction, and easily returns to its original state. And is provided with a predetermined panel constant.

In addition, a cylindrical press-fit portion 4 2a is formed at the upper end side of the bellows .42, a partition 42b is formed inside the press-fit portion 42a, and a center portion of the partition 42b is formed. A hole (not shown) is formed. The hole is formed so as to be removably engaged with the valve portion 44b of the valve stem 44, and when the hole is engaged with the valve portion 44b, the opening thereof is liquid-tightly closed. With such a configuration, the valve portion 44b and the partition 42b function as a valve. Further, the press-fitting portion 42 a is inserted into the lower end of the shaft case 43 in a liquid-tight manner.

The shaft case 43 includes a female thread portion 20a, a non-thread portion 20b, and a first engagement portion 20c (not shown), like the shaft case 20 shown in FIG. A large diameter portion 45 is formed at the lower end of the outer peripheral portion, and a concave portion 46 (see FIG. 10) is formed at a position corresponding to the air hole 16 d formed in the case 16. The shaft case 20 differs from the shaft case 20 in that an on-off valve 47 is formed in the recess 46. The large-diameter portion 45 is formed to have a larger diameter than other portions of the shaft case 43 by an amount corresponding to the thickness of the inner cylindrical portion 18 b of the cylinder 18, and as a result, is substantially formed on the inner surface of the case 16. Abut And with such a configuration, the backlash of the shaft case 43 in the case 16 is prevented. The on-off valve 47 is made of polyethylene or another elastomer, and is located on the case 16 side with the fitting portion 47 a mounted in the concave portion 46 as shown in FIG. 10. The valve body 47 b that opens and closes the air hole 16 d is integrally connected at the center in the respective height directions. The valve body 47 b is formed so as to be in close contact with the inner peripheral surface of the case 16 so as to ensure liquid tightness and to be slidable. The upper and lower portions are formed as lip portions (not shown) so that the movement is good.

The on-off valve 47 closes the air hole 16 d when the shaft case 43 is at the highest position in the case 16, as shown in FIG. When the shaft case 43 descends in the case 16 by operating the piston head 22, the air hole 16d is opened.

As in the example shown in FIG. 1, the biston head portion composed of the biston shaft 21 and the biston head 22 includes a male thread portion 21a and a second engagement portion 21b. However, this is different from the example shown in FIG. 1 in that a discharge valve 48 is provided in the connecting pipe 21c so as to allow only the liquid to flow from the biston shaft 21 side to the biston head 22 side. .

The discharge valve 48 has the same configuration as the above-described suction valve 24, includes a valve chamber 49 integrally formed with the connecting pipe 21c, and has a spherical valve body 50.

Next, a method of using the container 11 having the pump unit 10 having such a configuration will be described.

At the time of non-use during transportation or storage, the piston head 22 is rotated in advance to store the piston shaft 21 in the shaft case 43 as shown in FIG. Also, the biston head 22 is fitted to the outer cylindrical portion 18a of the chip plate 18 and is attached thereto. As a result, the piston shaft 21 and the piston head 22 are contracted, so that the container 11 can be easily packed. In this state, the piston head 22 is not further pressed, so that the liquid inside is not forcibly sent out.

Further, since the piston shaft 21 is accommodated in the shaft case 43 without pushing down the shaft case 43, the bellows 42 maintains an extended state without being compressed. Therefore, the bellows 42 is set by the compression for a long time. There is no such a problem.

Also, since the valve portion 44b of the valve stem 44 engages with the hole (not shown) of the partition 42 of the press-fitting portion 42a of the bellows 42, and the opening thereof is liquid-tightly closed. Even if the container 41 falls over, the liquid in the container body 12 does not flow out of the discharge port 22 through the bellows 42.

Also, since the shaft case 43 is not pushed down and is at the highest position in the case 16, the on-off valve 4 closes the air hole 16 d, and as a result, even if the container 41 falls over, etc. The liquid in the container body 12 passes through the air hole 16d, passes between the chip plate 18 and the shaft case 43, and does not leak out.

Next, in order to put the container 41 in the state shown in FIG. 11 in use, the same operation as in the container 11 shown in FIG. 1 is performed.

Then, similarly to the case of the container 11, the biston shaft 21 and the shaft case 43 are integrated, and the container 41 is in a use state as shown in FIG. At this time, the first engagement portion 20c of the shaft case 43 is sandwiched between the second engagement portion 21b of the piston head 21 and the male thread portion 21a, whereby The head 21 and the shaft case 43 are integrated, and the liquid tightness therebetween is ensured.

In addition, since the male screw portion 21a of the screw shaft 21 is located within the non-thread portion 20b, simply rotating the piston head 22 without pressing it will result in the screw shaft 21 (pis The tonhead 22) freely rotates without being interfered by the shaft case 43.

Then, when the piston head 22 is pressed as shown in FIG. 12 in this state, the shaft case 43 integrated with the button shaft 21 is lowered, and the bellows 42 is compressed. Further, when the piston head 22 is pressed, the on-off valve 47 is also lowered with the lowering of the shaft case 43, and the air hole 16d is opened by shifting from the position where the air hole 16d is closed.

When the shaft case 4 3 is pushed down and the bellows 4 2 is compressed, the bellows 4 2 press-fitting section 4 2 a partition 4 2 b descends from the valve stem 4 4 valve section 4 4 b, and the valve section 4 The engagement between 4b and the hole (not shown) of the partition 42b is released, and the hole of the partition 42b is opened. Further, although the air in the bellows 42 is compressed by the compression of the bellows 42, the suction valve 24 is closed, so that the air in the bellows 42 flows into the shaft case 43, and It is discharged outside through the hole of the ton shaft 21, the discharge valve 48 and the discharge pipe 22 b.

Subsequently, when the pressure on the piston head 22 is released, the bellows 42 returns in the extending direction and returns to the state shown in FIG. 9, so that the inside of the bellows 42 becomes negative pressure. At this time, as the bellows 42 returns in the extension direction, the shaft case 43 also rises, and as a result, the on-off valve 47 closes the air hole 16d again.

When the pressure in the bellows 4 2 becomes negative, the valve body 26 of the suction valve 24 rises and the suction valve 24 opens, whereby the bellows 4 2 flows from the container body 12 through the suction pipe 23. The liquid is sucked into the inside, and the inside of the bellows 42 is filled with the liquid.

Subsequently, when the pressing operation is repeated again as shown in FIG. 12, the suction valve 24 is closed so that the liquid in the bellows 42 is prevented from flowing back to the container body 12 side. The liquid in 42 flows into the shaft case 43, and is further discharged outside through the hole of the piston shaft 21, the discharge valve 48, and the discharge pipe 22b.

Subsequently, when the pressure on the piston head 22 is released, the bellows 42 returns as described above, and the inside of the bellows 42 becomes negative pressure, and the liquid flows from the container body 12 into the bellows 42. It is sucked and the bellows 4 2 is filled with liquid. Further, with the return of the bellows 42, the shaft case 43 also rises, and the on-off valve 47 closes the air hole 16d again. .

In the above operation, since the inside of the container body 12 communicates with the outside of the container 41 via the air holes 16 d and the gap between the chip plate 18 and the shaft case 43, the inside of the container body 12 is When the liquid is discharged from the, air corresponding to the volume of the liquid flows in from the outside. As a result, the occurrence of “dents” in the container main body 12 is prevented, and the shape of the container main body 12 is always maintained almost in the original shape.

Also in such a pump unit 40 and the container 41 using the same, the non-threaded portion 20b is formed in the shaft case 43, so that the biston shaft 21 can be made to idle inside the shaft case 43. . Therefore, apart from the operation of discharging the liquid in the container body 12, the direction of the discharge port 22c of the biston head 22 can be freely rotated. Because of this, the usability of the container 41 (pump unit 40) is improved. Also, since only the piston head 22 and the biston shaft 21 can be moved without moving (pressing down) the shaft case 43, the resin bellows 42 can be used even when packing. Keep stretched without compression. Therefore, there is no problem such as settling due to continuous compression of the bellows 42 for a long time. As a result, the operability of the pump unit 40 due to the compression of the bellows 42 for a long time is reduced. It is reliably prevented.

In addition, since the on-off valve 47 is provided at the position corresponding to the air hole 16d formed in the case 16 of the shaft case 43, the air hole 16d is operated by operating the biston part during use. By opening the, the pressure in the container body 12 is maintained at substantially the atmospheric pressure. In addition, when not in use, closing the air hole 16d by the on-off valve 47 prevents leakage of liquid from the air hole 16d.

In addition, since the shaft case 43 does not rotate in the circumferential direction with respect to the case 16, the shaft case 43 is rotated by the torsion force of the bellows 42 even though the bellows 42 has a spiral shape. do not do. As a result, the on-off valve 47 provided on the shaft case 43 is maintained at a position corresponding to the air hole 16d. Further, the torsion force of the spiral bellows 42 is transmitted to the piston head 22, thereby preventing inconvenience such that the operability is impaired.

It should be noted that the present invention is not limited to the above examples, and various changes can be made without departing from the gist of the present invention. For example, as described above, as the spring body in place of the bellows 19, any other structure, that is, a cylindrical body having a restoring force (biasing force) equivalent to a panel may be used.

Industrial applicability ''

As described above, in the pump unit of the present invention and the container provided with the pump unit, since the non-threaded portion is formed in the shaft case, the piston head portion can be idled in the shaft case. As a result, it is possible to freely rotate the discharge port of the biston head separately from the operation of discharging the liquid in the container body, thereby improving the usability of the pump.

Also, rotate the biston head to insert the female screw into the female case of the shaft case. By screwing the male screw portion of the head portion, only the piston head portion can be housed in, for example, the shaft case without moving the shaft case. As a result, when packing, etc., the operability due to inconvenience, such as the fatigue caused by the resin urging member continuing to receive the compressive force against the urging force over a long period of time, resulting in stiffness Is prevented.

Claims

The scope of the claims

1. In the pump unit that is inserted into the container body and sucks the liquid in the container body out of the container body,

A liquid storage portion inserted into the container main body, and a liquid that is movably inserted into the liquid storage portion to reduce the volume of the liquid storage portion, thereby discharging the liquid from the liquid storage portion to the outside of the container main body, and A piston part for causing the liquid in the container body to flow into the liquid storage part by expanding the volume in the liquid storage part,

A shaft case in which the piston portion is provided in the liquid storage portion, and a female screw portion is formed on an inner peripheral surface thereof; A male screw portion formed to be screwed into the female screw portion, and a biston head portion movably penetrated into the shaft case, and the shaft case has the biston head portion. A pump unit with a non-threaded part that allows the external thread to rotate freely in the circumferential direction of the shaft case.

2. The pump screw according to claim 1, wherein the shaft case is provided with a resin urging member that urges the shaft case in a direction of returning the shaft case when the shaft case moves in a direction of reducing the volume in the liquid storage unit. Cut.

3. The pump unit according to claim 2, wherein the urging member is a panel-like body made of resin and capable of returning in an extending direction.

4. A container provided with the pump unit according to claim 1.