JP7158253B2 - ejector - Google Patents

Description

The present invention relates to dispensers.

Conventionally, as shown in Patent Document 1 below, for example, a mounting cap mounted on the mouth of a container body, a pump having a stem penetrating the mounting cap so as to be movable downward in an upward biased state, A push-down head, which is attached to the upper end of the stem and has a discharge hole formed therein for discharging the contents, and a push-down head positioned at the lower end position are detachably mounted to restrict upward movement of the push-down head and the stem. a regulating cylinder, wherein the pump has a cylindrical piston that is linked to the vertical movement of the stem; a cylinder that has a sliding cylindrical portion in which the piston is fitted so as to be vertically slidable; A dispenser is known that includes a piston guide inserted inside and a lower valve body that opens and closes a lower end opening of a cylinder.
In this type of dispenser, a cylinder is positioned below the sliding cylinder, has an inner diameter smaller than the inner diameter of the sliding cylinder, and includes a housing cylinder in which a lower valve body is arranged, and a push-down head. When the piston guide is positioned at the lower end position, the piston guide has a seal portion that is detachably fitted into the housing cylinder and blocks communication between the housing cylinder and the sliding cylinder. Arrangements are known to provide. In this dispenser, the seal portion is fitted into the housing cylinder portion with the push-down head attached to the regulating cylinder. , can be prevented from entering the sliding tube portion of the cylinder.

JP 2015-182801 A

However, in the conventional dispenser, the lower end opening of the cylinder, which the lower valve body opens and closes, is formed in the housing tube portion whose inner diameter is smaller than the inner diameter of the sliding tube portion, so the lower end opening of the cylinder can be widened. The flow resistance is high when the contents in the container body pass through the lower end opening of the cylinder, and it takes time to restore and move the push-down head, stem, piston guide, and piston upward after discharging the contents. I had a problem with it. This problem becomes apparent when the viscosity of the content is high.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a dispenser in which the push-down head, stem, piston guide, and piston can be quickly restored upward after dispensing the contents. aim.

In order to solve the above-mentioned problems and achieve such objects, the dispenser of the present invention includes a mounting cap mounted on the mouth of a container body, and a mounting cap capable of moving downward in an upwardly biased state. a push-down head attached to the upper end of the stem and formed with a discharge hole for discharging contents; and the push-down head positioned at the lower end position are detachable. a regulating cylinder mounted to regulate upward movement of the push-down head and the stem, wherein the pump is fitted with a cylindrical piston that is linked to the vertical movement of the stem, and the piston is vertically slidable. a piston guide fixed to the stem and inserted through the inside of the piston; and a lower valve body that opens and closes a lower end opening of the cylinder. A housing cylinder portion positioned below the sliding cylinder portion and having the lower valve body disposed thereinside is provided, and the lower valve body includes a fitting portion fitted in the housing cylinder portion and the fitting portion. a valve body disposed inside the valve body and mounted on the peripheral edge portion of the lower end opening of the cylindrical housing portion on the inner surface of the cylindrical housing portion so as to be separated upward; and a connecting piece connecting the valve body and the inner peripheral surface of the fitting portion; is positioned at the lower end position, the piston guide presses the valve body through the valve projection against the peripheral edge portion of the lower end opening of the cylindrical housing portion on the inner surface of the cylindrical housing portion. The inner peripheral surfaces of the cylinder portion and the housing cylinder portion are connected without steps, the inner diameters of the sliding cylinder portion and the housing cylinder portion are equal to each other , and the piston guide is provided inside the lower portion of the stem. and a capped cylindrical enlarged diameter portion protruding downward from the lower end of the mounting portion, wherein the mounting portion extends downward from the lower end opening of the stem. The radially outer portion of the ceiling wall portion of the enlarged diameter portion gradually extends upward in the radial direction from the upper end portion of the peripheral wall portion of the enlarged diameter portion and extends radially inward. is formed flat and connected to the lower end of the mounting portion, the valve projection is formed in the shape of a shaft extending in the vertical direction, the push-down head is mounted on the regulating cylinder, and the piston guide is positioned at the lower end position, the lower surface of the radially inner portion of the top wall portion of the enlarged diameter portion pushes the valve projection downward. sink in

According to this aspect of the invention, the inner peripheral surfaces of the cylindrical sliding portion and the cylindrical housing portion are continuous without steps, and the inner diameters of the cylindrical sliding portion and the cylindrical housing portion are equal to each other. It is possible to widen the inner diameter of the container body, reduce the flow resistance when the contents in the container body pass through the lower end opening of the cylinder, and after the contents are discharged, the push-down head, stem, piston guide, and piston It can be quickly restored and moved upwards.
When the push-down head is attached to the regulating cylinder and the piston guide is positioned at the lower end position (hereinafter referred to as a storage state), the piston guide moves the valve body through the valve protrusion to the housing cylinder on the inner surface of the housing cylinder. Therefore, even if the internal pressure of the container body rises during storage, the valve body is separated upward from the peripheral edge of the lower end opening of the housing cylinder on the inner surface of the housing cylinder. As a result, the contents in the container body can be prevented from entering the storage cylinder. Therefore, even if the inner diameter of the housing cylinder is made smaller than the inner diameter of the sliding cylinder and the seal part of the piston guide is not detachably fitted into the housing cylinder in the storage state as in the conventional art, the piston guide can be kept in the storage state. It is possible to reliably prevent the contents in the container body from reaching the sliding cylindrical portion of the cylinder when the internal pressure of the container body rises.

Here, the peripheral edge portion of the lower end opening of the cylindrical housing portion on the inner surface of the cylindrical housing portion gradually extends downward from the radially outer side to the inner side, A portion of the inner surface that abuts against the peripheral edge portion of the lower end opening of the housing cylinder portion may be formed in a curved surface shape that protrudes downward.

In this case, the peripheral edge portion of the lower end opening of the cylindrical housing portion (hereinafter referred to as a valve seat surface) on the inner surface of the cylindrical housing portion gradually extends downward from the radially outer side to the inner side, and the valve main body: Since the portion of the housing cylinder that abuts against the valve seat surface is formed in the shape of a curved surface protruding downward, it is possible to reliably ensure sealing between the valve main body and the valve seat surface.

Further, the pump includes a coil spring that urges the stem and the piston guide together upward. The valve body is connected to the inner peripheral surface of the lower portion via the connecting piece, and is radially inwardly attached to the inner peripheral surface of the upper tubular portion. A protrusion projecting toward and extending continuously over the entire circumference and having a seat surface facing upward is formed, the lower end opening edge of the coil spring abuts the seat surface, and the valve protrusion is It may be inserted inside the fitting portion with a radial gap provided between it and the inner peripheral surface of the fitting portion.

In this case, since the valve projection is inserted inside the fitting portion with a radial gap between itself and the inner peripheral surface of the fitting portion, the flow resistance of the contents flowing through this gap is reduced. can be suppressed, and the contents in the container body can be smoothly introduced into the cylinder with little resistance. Therefore, after the contents are discharged, the pressing head, the stem, the piston guide, and the piston can be reliably moved back up quickly.

According to the present invention, the pressing head, stem, piston guide, and piston can be quickly restored upward after the content is discharged.

FIG. 4 is a longitudinal cross-sectional view of the dispenser shown as one embodiment of the present invention, showing a state in which the push-down head is positioned at the lower end position; FIG. 4 is a vertical cross-sectional view of the dispenser shown as one embodiment of the present invention, showing a state in which the push-down head is positioned at the upper end position;

A discharger 1 according to an embodiment of the present invention will be described below with reference to the drawings.
As shown in FIGS. 1 and 2, the dispenser 1 of this embodiment has a mounting cap 21 mounted on the mouth portion W2 of the container body W, and the mounting cap 21 is urged upward to be movable downward. A pump 24 having a penetrating stem 11, a push-down head 16 attached to the upper end of the stem 11 and formed with a discharge hole 16a for discharging contents, and a push-down head 16 positioned at the lower end position. and a restricting cylinder 22 that is detachably mounted and restricts upward movement of the pressing head 16 and the stem 11 .

The pump 24 is fixed to the stem 11 and has a cylinder 15 having a tubular piston 14 that is linked to the vertical movement of the stem 11, a sliding tubular portion 15a in which the piston 14 is fitted so as to be vertically slidable, and the piston 14. a lower valve body 18 that opens and closes the lower end opening of the cylinder 15; and a coil spring 19 that is disposed inside the cylinder 15 and biases the piston guide 17 upward.

The mounting cap 21, the stem 11, the regulating cylinder 22, the piston 14, the cylinder 15, and the coil spring 19 are each arranged coaxially with a common shaft extending in the vertical direction. Hereinafter, this common axis will be referred to as the axis O, the direction that intersects the axis O when viewed from above and below will be referred to as the radial direction, and the direction that rotates around the axis O will be referred to as the circumferential direction.

The container main body W includes a flexible bag-like pouch W1 that deforms to reduce the volume as the content decreases, and a spout W3 that is fixed to the upper end of the pouch W1 and has a mouth portion W2.
The piston 14 includes an outer cylinder 28 that slides on the inner peripheral surface of the cylinder 15, an inner cylinder 29 disposed inside the outer cylinder 28, and an annular connection that connects the outer cylinder 28 and the inner cylinder 29 over the entire circumference. a portion 27;
The connecting portion 27 connects intermediate portions located between the upper end portion and the lower end portion of each of the outer cylinder 28 and the inner cylinder 29 . As shown in FIG. 2, in the standby state in which the pressing head 16 and the stem 11 are positioned at the raised end position, the upper surface of the connecting portion 27 is positioned below the lower edge of the opening of the stem 11, and the pressing head 16 is positioned downward. When the stem 11 is pushed down, the lower opening edge of the stem 11 abuts on the upper surface of the connecting portion 27 . The inner cylinder 29 is fitted in the lower end portion of the stem 11 so as to be vertically slidable.

A flange portion 15d that protrudes radially outward is formed on the upper portion of the cylinder 15 over the entire circumference, and the flange portion 15d is arranged on the upper end opening edge of the mouth portion W2 of the container body W. The cylinder 15 is positioned below the sliding tubular portion 15a and includes a tubular housing portion 15b in which the lower valve body 18 is disposed, and a connecting tubular portion 15c projecting downward from the tubular housing portion 15b. Prepare.
A suction pipe 15e having a lower end opening positioned at the bottom of the container body W is fitted in the connecting tube portion 15c.

The inner peripheral surfaces of the sliding tubular portion 15a and the accommodating tubular portion 15b are continuous without steps, and the inner diameters of the sliding tubular portion 15a and the accommodating tubular portion 15b are equal to each other. The push-down head 16, the stem 11, and the piston guide 17 are positioned at the lower end positions on the inner peripheral surface of the connecting portion between the slide cylinder portion 15a and the housing cylinder portion 15b, and the push-down head 16 is screwed into the regulation cylinder 22. In the fitted storage condition, the lower end of the outer cylinder 28 of the piston 14 is located.

The mounting cap 21 is formed in a truncated tubular shape having an annular top wall portion 21a. A female screw portion is formed on the inner peripheral surface of the mounting cap 21 to be screwed into the mouth portion W2.
The ceiling wall portion 21 a is arranged on the upper surface of the flange portion 15 d of the cylinder 15 . An upper end portion of the cylinder 15 located above the flange portion 15d is inserted inside the top wall portion 21a.

The piston guide 17 is fitted into the stem 11, protrudes downward from the stem 11, and penetrates the inside of the piston 14 in the vertical direction. The piston guide 17 has a tubular mounting portion 31 fitted within the lower portion of the stem 11 . The mounting portion 31 protrudes downward from the lower end opening of the stem 11 . A through hole 31 b that opens radially is formed in the lower end portion of the mounting portion 31 . The through hole 31b has a vertically elongated rectangular shape with long sides extending straight in the vertical direction and short sides curving outward in the vertical direction when viewed from the outside in the radial direction.

The piston guide 17 has an enlarged diameter portion 13 projecting downward from the lower end portion of the mounting portion 31 . The enlarged diameter portion 13 is formed in a capped tubular shape. The inner and outer diameters of the peripheral wall portion of the expanded diameter portion 13 are larger than the inner and outer diameters of the mounting portion 31, respectively. The inner diameter of the peripheral wall portion of the enlarged diameter portion 13 is larger than the outer diameter of the mounting portion 31 . A plurality of through holes are formed in the circumferential wall portion of the expanded diameter portion 13 at intervals in the circumferential direction. A gap is provided between the outer peripheral surface of the peripheral wall portion of the enlarged diameter portion 13 and the inner peripheral surface of the cylinder 15 . Of the ceiling wall portion of the enlarged diameter portion 13, the radially outer portion gradually extends upward from the upper end portion of the peripheral wall portion toward the radially inner side, and the radially inner portion is formed flat. , is connected to the lower end of the mounting portion 31 .

In the standby state in which the pressing head 16 and the stem 11 are positioned at the raised end position, the lower end of the inner cylinder 29 of the piston 14 is in contact with the upper surface of the radially outer portion of the top wall portion of the enlarged diameter portion 13 . As a result, communication between a portion of the cylinder 15 located below the piston 14 and the through hole 31b of the piston guide 17 is blocked.
When the push-down head 16 is pushed down, the upper surface of the radially outer portion of the top wall portion of the enlarged diameter portion 13 moves downward away from the lower end of the inner cylinder 29 of the piston 14 and is positioned below the piston 14 in the cylinder 15 . The portion that does so communicates with the through hole 31b of the piston guide 17 .
After the push-down head 16 is pushed down to eject the contents, when the stem 11 is restored upward, the upper surface of the radially outer portion of the ceiling wall portion of the enlarged diameter portion 13 is pushed against the inner cylinder 29 of the piston 14 . By coming into contact with the lower end, the piston 14 restores and moves upward while the communication between the portion located below the piston 14 and the through hole 31b of the piston guide 17 in the cylinder 15 is cut off.

The lower valve body 18 is arranged in a portion positioned below the piston guide 17 within the cylinder 15 in a standby state in which the push-down head 16 and the stem 11 are positioned at the raised end position. The lower valve body 18 is arranged inside the housing cylinder portion 15b.
The lower valve body 18 includes a fitting portion 33 fitted into the housing cylinder portion 15b, a valve main body 34 arranged inside the fitting portion 33 for opening and closing the lower end opening of the cylinder 15, and an elastically deformable valve body 34. A connecting piece 34 a is formed and connects the valve main body 34 and the inner peripheral surface of the fitting portion 33 .

The fitting portion 33 includes a lower portion 33a fitted into the lower end portion of the housing tubular portion 15b, and an upper tubular portion 33b extending upward from the lower portion 33a.
The lower portion 33a includes an annular body positioned at the lower end portion and extending continuously over the entire circumference, and a connecting portion that connects the upper end opening edge of the annular body and the lower end opening edge of the upper cylindrical portion 33b. The connecting portions are separately arranged on both sides of the axis O in the radial direction.
A ridge portion is formed on the inner peripheral surface of the lower end portion of the upper tubular portion 33b so as to protrude radially inward and extend continuously over the entire circumference. A seat surface 33c facing upward is formed on the ridge portion, and the seat surface 33c vertically faces the outer peripheral edge portion of the lower surface of the top wall portion of the enlarged diameter portion 13 of the piston guide 17. As shown in FIG.

The valve main body 34 is placed upwardly and separably from a peripheral edge portion (hereinafter referred to as a valve seat surface) 15f of the lower end opening of the cylindrical housing portion 15b on the inner surface of the cylindrical housing portion 15b. The valve seat surface 15f gradually extends downward from the radially outer side to the inner side. The valve body 34 is arranged inside the lower portion 33 a of the fitting portion 33 . The valve body 34 is connected to the inner peripheral surface of the annular body at the lower portion 33a of the fitting portion 33 via an elastically deformable connecting piece 34a. The valve body 34 has a circular shape when viewed in the vertical direction. A portion of the valve main body 34 that abuts against the valve seat surface 15f of the housing cylinder portion 15b is formed in a curved surface shape protruding downward.

The lower valve body 18 serves as a check valve that keeps the lower end opening of the cylinder 15 closed when the cylinder 15 is pressurized, and opens the lower end opening of the cylinder 15 when the cylinder 15 is decompressed. As a result, when the cylinder 15 is pressurized, the contents in the cylinder 15 are prevented from returning into the container body W from the lower end opening of the cylinder 15, and when the pressure in the cylinder 15 is decompressed, the contents in the container body W are prevented from returning. It flows into the cylinder 15 from the lower end opening of the cylinder 15 .

Further, in this embodiment, the lower valve body 18 includes a valve projection 35 extending upwardly from the valve body 34 .
The valve projection 35 is formed integrally with the valve body 34 . The valve projection 35 is formed in the shape of a shaft coaxial with the axis O. As shown in FIG. The outer diameter of the valve projection 35 is smaller than the outer diameter of the valve body 34 . The valve projection 35 is inserted inside the fitting portion 33 with a radial gap provided between it and the inner peripheral surface of the fitting portion 33 , and protrudes upward from the upper end opening of the fitting portion 33 . .
When the push-down head 16 is attached to the regulating cylinder 22 and the piston guide 17 is positioned at the lower end position, the lower surface of the radially inner portion of the top wall portion of the piston guide 17 pushes the valve projection 35 downward. . As a result, the valve main body 34 is pressed against the valve seat surface 15f of the cylindrical housing portion 15b, and the opening at the lower end of the cylindrical housing portion 15b is sealed.

The coil spring 19 urges the stem 11 and the piston guide 17 together upward.
The upper end of the coil spring 19 is inserted inside the enlarged diameter portion 13 of the piston guide 17 . The outer peripheral surface of the upper end portion of the coil spring 19 is in contact with or close to the inner peripheral surface of the enlarged diameter portion 13 . The upper end opening edge of the coil spring 19 is in contact with the outer peripheral edge of the lower surface of the top wall portion of the enlarged diameter portion 13 .
The lower end of the coil spring 19 is inserted into the upper cylindrical portion 33b of the lower valve body 18. As shown in FIG. The outer peripheral surface of the lower end portion of the coil spring 19 is in contact with or close to the inner peripheral surface of the upper cylindrical portion 33b. A lower end opening edge of the coil spring 19 is in contact with the seat surface 33 c of the lower valve body 18 .

The pressing head 16 includes a fitting cylinder 16b fitted into the upper end of the stem 11, a discharge cylinder 16c protruding radially outward from the fitting cylinder 16b and having a discharge hole 16a formed at its tip. and a threaded tube 16d surrounding the fitting tube 16b from the outside in the radial direction. The discharge cylinder 16c penetrates the threaded cylinder 16d in the radial direction. A sealing projection 16e is formed continuously extending over the entire circumference on the outer peripheral surface of the portion of the fitting cylinder 16b that protrudes upward from the stem 11. As shown in FIG.

The regulating cylinder 22 includes an outer fitting cylinder 22a externally fitted to the upper end of the cylinder 15, and a male threaded cylinder 22b to which the screwing cylinder 16d of the push head 16 located at the lower end position is screwed.

The lower portion of the male threaded cylinder 22b is inserted into the upper end portion of the cylinder 15, the upper portion protrudes upward from the upper end portion of the cylinder 15, and a male threaded portion is formed on the outer peripheral surface of the upper portion. The outer peripheral surface of the lower portion of the male threaded cylinder 22b and the inner peripheral surface of the upper end portion of the cylinder 15 are respectively formed with anti-rotation portions that engage with each other. An introduction passage 25 is formed between the inner peripheral surface of the male threaded cylinder 22b and the outer peripheral surface of the stem 11 to communicate the outside with the inner peripheral surface side of the outer cylinder 28 of the piston 14 . In a standby state in which the pressing head 16 and the stem 11 are positioned at the raised end position, the upper opening edge of the outer cylinder 28 of the piston 14 abuts or approaches the lower opening edge of the male threaded cylinder 22b.

A seal tube portion 22c protruding upward is formed at the upper end opening edge of the male screw tube 22b. When the stem 11, the piston guide 17, and the push head 16 are positioned at the lowered end position and the push head 16 is screwed to the regulation cylinder 22, the seal protrusion of the push head 16 is inserted into the seal cylinder portion 22c. 16e are tightly fitted.

A method of using the discharger 1 configured as described above will be described.

First, by rotating the push-down head 16 located at the lower end position about the axis O with respect to the regulation cylinder 22, the female threaded portion of the threaded cylinder 16d of the push-down head 16 and the male screw of the male screw cylinder 22b of the regulation cylinder 22 are rotated. Unscrew the part and . At this time, the push head 16, the stem 11, and the piston guide 17 are raised relative to the cylinder 15, and the enlarged diameter portion 13 of the piston guide 17 is separated upward from the valve protrusion 35 of the lower valve body 18. Then, the upward biasing force of the coil spring 19 raises the piston guide 17, the stem 11, and the pressing head 16 together. In this process, the upper surface of the radially outer portion of the top wall portion of the enlarged diameter portion 13 of the piston guide 17 abuts the lower end portion of the inner cylinder 29 of the piston 14, and the piston 14 also rises.
As a result, the inside of the cylinder 15 is decompressed, and the valve main body 34 of the lower valve body 18 is separated upward from the valve seat surface 15f of the cylindrical housing portion 15b, and the lower end opening of the cylinder 15 is opened. flows into the cylinder 15 through the suction pipe 15e.

Then, when the pressing head 16 is pushed down to move the stem 11 and the piston guide 17 downward, first, the upper surface of the radially outer portion of the top wall portion of the enlarged diameter portion 13 of the piston guide 17 is positioned inside the piston 14. A portion located below the piston 14 in the cylinder 15 and the through hole 31b of the piston guide 17 communicate with each other, and the lower end opening edge of the stem 11 communicates with the piston. 14 is in contact with the upper surface of the connecting portion 27 . Further, when this downward movement is continued, the piston 14 also moves downward, so that the contents in the cylinder 15 flow into the stem 11 through the through hole 31b and the mounting portion 31 in the piston guide 17, and then into the discharge hole 16a. is discharged from
Next, when the depression of the push-down head 16 is released, the piston guide 17, the piston 14, the stem 11, and the push-down head 16 are restored and moved upward by the upward biasing force of the coil spring 19 in the same manner as described above. The contents inside flow into the cylinder 15 .

As described above, according to the discharger 1 according to the present embodiment, the inner peripheral surfaces of the sliding tubular portion 15a and the accommodating tubular portion 15b are connected without steps, and the inner diameters of the sliding tubular portion 15a and the accommodating tubular portion 15b are equal to each other. are equal to each other, it is possible to widen the inner diameter of the lower end opening of the housing cylinder portion 15b, and reduce the flow resistance when the contents in the container main body W pass through the lower end opening of the cylinder 15. , the push head 16, the stem 11, the piston guide 17, and the piston 14 can be quickly restored upward after the contents are discharged.

When the push-down head 16 is attached to the regulating cylinder 22 and the piston guide 17 is positioned at the lower end position (hereinafter referred to as a storage state), the piston guide 17 moves the valve main body 34 through the valve projection 35 into the housing cylinder portion. 15b against the valve seat surface 15f, even if the internal pressure of the container main body W rises in the storage state, the valve main body 34 separates upward from the valve seat surface 15f, and the contents in the container main body W are accommodated. It is possible to prevent it from entering the cylindrical portion 15b. Therefore, unlike the conventional art, the inner diameter of the housing cylinder portion 15b must be smaller than the inner diameter of the sliding cylinder portion 15a, and the sealing portion of the piston guide 17 must be detachably fitted into the housing cylinder portion 15b in the storage state. Also, it is possible to reliably prevent the contents in the container body W from reaching the sliding cylinder portion 15a of the cylinder 15 when the internal pressure of the container body W increases in the storage state.

In addition, the valve seat surface 15f of the housing cylinder portion 15b gradually extends downward from the radially outer side toward the inner side, and the portion of the valve main body 34 that contacts the valve seat surface 15f protrudes downward. , the sealing performance between the valve main body 34 and the valve seat surface 15f can be reliably ensured.

Further, since the valve projection 35 is inserted inside the fitting portion 33 with a radial gap between itself and the inner peripheral surface of the fitting portion 33, the contents flowing through this gap The flow resistance can be suppressed, and the contents in the container body W can be smoothly introduced into the cylinder 15 with little resistance. Therefore, after the contents are discharged, the pressing head 16, the stem 11, the piston guide 17, and the piston 14 can be quickly restored upward.

The present invention is not limited to the above-described embodiments, and can be modified as appropriate without departing from the scope of the invention.

For example, in the above-described embodiment, the push-down head 16 positioned at the lower end position is detachably screwed as the regulating cylinder 22. However, the present invention is not limited to this. It may be changed as appropriate, such as a configuration that
The mounting cap 21 and the restricting cylinder 22 may be integrally formed.
The valve seat surface 15f may be changed as appropriate, such as a flat surface extending in a direction orthogonal to the axis O, for example.
The portion of the valve main body 34 that abuts against the valve seat surface 15f of the cylindrical housing portion 15b may be changed as appropriate, such as a flat surface extending in a direction orthogonal to the axis O, for example.
An introduction hole may be formed in the cylinder 15 that opens in the radial direction and communicates the inside of the container body W with the inside of the cylinder 15 . This introduction hole may be closed by the outer peripheral surface of the outer cylinder 28 in the aforementioned standby state as shown in FIG. When the introduction hole is formed in the cylinder 15, the container body W does not need to be deformed to reduce its volume.

In addition, it is possible to appropriately replace the components in the above-described embodiment with well-known components without departing from the gist of the present invention, and the above-described modifications may be combined as appropriate.

Reference Signs List 1 Discharger 11 Stem 14 Piston 15 Cylinder 15a Sliding cylinder portion 15b Housing cylinder portion 15f Valve seat surface (periphery)
16 push-down head 16a discharge hole 17 piston guide 18 lower valve body 19 coil spring 21 mounting cap 22 regulating cylinder 24 pump 33 fitting portion 33a lower portion 33b upper cylinder portion 33c seat surface 34 valve main body 34a connecting piece 35 valve projection W container main body W2 Mouth

Claims (3)

a mounting cap mounted on the mouth of the container body;
a pump having a stem penetrating the mounting cap so as to be movable downward in an upwardly biased state;
a push-down head mounted on the upper end of the stem and formed with a discharge hole for discharging contents;
a restriction cylinder to which the depressing head located at the lower end position is detachably attached and which restricts upward movement of the depressing head and the stem;
The pump is
a cylindrical piston linked to the vertical movement of the stem;
a cylinder having a sliding cylindrical portion in which the piston is fitted so as to be vertically slidable;
a piston guide fixed to the stem and inserted inside the piston;
a lower valve body that opens and closes the lower end opening of the cylinder,
The cylinder includes a housing cylinder located below the sliding cylinder and having the lower valve element disposed therein,
The lower valve body includes a fitting portion that is fitted into the housing cylinder portion, and is disposed inside the fitting portion, and is disposed on the inner surface of the housing cylinder portion at a peripheral edge portion of a lower end opening of the housing cylinder portion. a valve body mounted so as to be separable upward; a connecting piece formed to be elastically deformable and connecting the valve body and an inner peripheral surface of the fitting portion; a valve projection extending into
When the push-down head is attached to the regulating cylinder and the piston guide is positioned at the lower end position, the piston guide moves the valve body through the valve projection to the receiving cylinder on the inner surface of the receiving cylinder. Press against the peripheral edge of the lower end opening of the cylinder,
The inner peripheral surfaces of the sliding cylinder portion and the housing cylinder portion are connected without steps,
The inner diameters of the sliding cylinder portion and the housing cylinder portion are equal to each other ,
The piston guide is
a cylindrical mounting portion fitted in the lower portion of the stem;
a truncated cylindrical enlarged diameter portion protruding downward from the lower end of the mounting portion,
The mounting portion protrudes downward from a lower end opening of the stem,
A radially outer portion of the ceiling wall portion of the enlarged diameter portion gradually extends upward from the upper end portion of the peripheral wall portion of the enlarged diameter portion toward the inner side in the radial direction. is formed flat and connected to the lower end of the mounting part,
The valve projection is formed in the shape of a shaft extending in the vertical direction,
When the push-down head is attached to the regulating cylinder and the piston guide is positioned at the lower end position, the lower surface of the radially inner portion of the top wall portion of the enlarged diameter portion faces the valve projection downward. Push in, ejector. a peripheral edge portion of the lower end opening of the housing cylinder portion on the inner surface of the housing cylinder portion gradually extends downward from the radially outer side toward the inner side;
2. The discharge according to claim 1, wherein, in the valve body, a portion of the inner surface of the cylindrical housing portion that abuts against a peripheral edge portion of the lower end opening of the cylindrical housing portion is formed in a curved surface shape protruding downward. vessel. the pump includes a coil spring that biases the stem and the piston guide together upward;
The fitting portion includes a lower portion fitted into the lower end portion of the housing tubular portion, and an upper tubular portion extending upward from the lower portion,
The valve body is connected to the inner peripheral surface of the lower portion via the connecting piece,
On the inner peripheral surface of the upper cylindrical portion, a ridge portion is formed that protrudes radially inward, extends continuously over the entire circumference, and has a bearing surface that faces upward,
a lower end opening edge of the coil spring abuts against the seat surface;
3. The dispenser according to claim 1, wherein said valve projection is inserted inside said fitting portion with a radial gap provided between it and an inner peripheral surface of said fitting portion.

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