JP2019064674A - Discharger - Google Patents

Abstract

To suppress inner pressure in a storage tube part from increasing when remounting a push-down head on a regulation tube.SOLUTION: A cylinder 15 comprises: a slidable tube part 15a fitted with a piston 14 slidably in a vertical direction; and a storage tube part 15b, positioned lower than the slidable tube part, whose inner diameter is smaller than the inner diameter of the slidable tube part and in which a lower valve body 18 is arranged. A piston guide 17 comprises a seal part 12 which when the part is positioned at a descent end position together with a push-down head 16 and a stem 11, is detachably fitted into the storage tube part 15b and cuts off communication between the inside of the storage tube part and the inside of the slidable tube part. In the piston guide, in at least one of a wall surface defining a closed space X between the inner surface of the storage tube part and the wall surface, a valve main body 34 of a lower valve body and the storage tube part is formed an inner pressure absorption part 35 which absorbs increased inner pressure in the storage tube part by being restorably deformed when descending the push-down head positioned at an ascent end position to mount the head on a regulation tube 22 when the piston guide is positioned at the descent end position.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a dispenser.

Conventionally, for example, as shown in Patent Document 1 below, a mounting cap attached to the mouth of the container body, and a pump having a stem penetrably and movably penetrated downward in the mounting cap. A pressing head mounted on the upper end of the stem and having a discharge hole for discharging the contents formed therein, and a pressing head located at the lower end position are detachably mounted to restrict upward movement of the pressing head and the stem The pump includes a cylindrical piston linked to the vertical movement of the stem, a cylinder having a sliding cylindrical portion in which the piston is fitted slidably in the vertical direction, and linked to the vertical movement of the stem There is known a discharger including a piston guide inserted inside a piston and a lower valve body having a valve body for opening and closing a lower end opening of a cylinder.
As a discharge device of this type, a cylinder is provided below the sliding cylinder, the inner diameter is smaller than the inner diameter of the sliding cylinder, and the inner cylinder is provided with the lower valve body inside, and the piston guide is It is known that a configuration including a seal that is detachably fitted in the receiving cylinder and that blocks communication between the inside of the receiving cylinder and the inside of the sliding cylinder when the pressing head and the stem are located at the lowered end position. There is. In this dispenser, the seal portion is fitted in the storage cylinder portion in a state in which the pressing head is mounted on the restriction cylinder, so even if the internal pressure of the container body rises in this state, the contents in the container body are And can be prevented from entering the sliding cylinder of the cylinder.
By the way, some users remove the pressing head from the restriction cylinder and use the contents with the pressing head, the stem, the piston, and the piston guide positioned at the rising end position, and then use the container body with the dispenser, for example, outside. In order to bring it out, the pressing head or the like may be again positioned at the lowering end position, and the pressing head may be attached to the restriction cylinder.

JP, 2015-182801, A

  However, in the conventional discharger, when the pressing head located at the rising end position is mounted on the regulation cylinder again, the internal pressure of the containing cylindrical portion rises, so that, for example, the pressing head is moved to the lowering end position. There is a fear that the pressing head can not be reached, the mounting of the pressing head to the regulating cylinder becomes insufficient, or the pressing head comes off from the regulating cylinder due to the repulsive force from the contents in the housing cylinder. .

  The present invention has been made in consideration of such circumstances, and it is an object of the present invention to provide a discharger capable of suppressing an increase in the internal pressure of the storage cylinder portion when the pressing head is remounted on the restriction cylinder. To aim.

  In order to solve the above problems and achieve such an object, the dispenser according to the present invention is capable of moving downward with an attachment cap attached to the mouth of the container body and the attachment cap in an upwardly biased state. A pump having a stem through which is inserted, a pressing head mounted on the upper end of the stem and having a discharge hole for discharging the contents, and the pressing head located at the lower end position are detachably attachable The pump includes a cylindrical piston linked to the vertical movement of the stem, and the piston is fitted so that the piston can slide up and down. A cylinder having a sliding cylinder portion, a piston guide which is linked to the vertical movement of the stem and is inserted inside the piston, and a lower valve body having a valve body for opening and closing the lower end opening of the cylinder; The cylinder includes an accommodating cylindrical portion located below the sliding cylindrical portion, having an inner diameter smaller than the inner diameter of the sliding cylindrical portion, and in which the lower valve body is disposed inside, and the piston guide The discharge is provided with a seal that is detachably fitted in the receiving cylinder and is located between the receiving cylinder and the sliding cylinder when the pressing head and the stem are located at the lowering end position. A wall surface defining a closed space with the inner surface of the storage cylinder when the piston guide is positioned at the lower end position, the valve body, and the storage cylinder; An internal pressure absorbing portion is formed that absorbs increase in internal pressure of the containing cylindrical portion by deforming so as to be recoverable when the pressing head located at the rising end position is lowered and attached to the restriction cylinder at least one. In particular To.

  According to the present invention, the internal pressure absorbing portion is formed on at least one of the wall surface of the piston guide, the valve main body, and the storage cylindrical portion, so the pressing head located at the rising end position is lowered to control the cylinder When the inner pressure of the storage cylinder is about to rise when mounting on the cylinder, that is, when the piston guide located at the rising end position is lowered and the seal is fitted in the storage cylinder, the internal pressure absorbing part is deformed By doing this, it is possible to absorb the rise in the internal pressure of the storage cylinder. Therefore, the push head, the stem, the piston, and the piston guide located at the rising end position can be made to reach the lowering end position, and the push head can be reliably attached to the restriction cylinder again.

Here, the internal pressure absorbing portion is formed on at least one of the wall surface of the piston guide and the valve main body, and when the pressing head located at the rising end position is lowered and mounted on the restriction cylinder Alternatively, reverse deformation or elastic deformation may be performed toward the outside of the storage cylinder.
In this case, when the internal pressure absorbing portion is formed on at least one of the wall surface of the piston guide and the valve main body, and the pressing head located at the rising end position is lowered and mounted on the restriction cylinder, As the internal pressure of the containing cylinder is going to rise as described above, the internal pressure absorbing part reverses or elastically deforms toward the outside of the containing cylinder as described above. By doing this, this rise in internal pressure can be absorbed.

Further, the internal pressure absorbing portion is formed in the valve main body, is formed in a curved surface shape protruding toward the inside of the storage cylinder, and is formed so as to be capable of reverse deformation toward the outside of the storage cylinder. It is also good.
In this case, the internal pressure absorbing portion is formed in a curved surface shape protruding toward the inside of the storage cylinder and formed so as to be capable of reverse deformation toward the outside of the storage cylinder, as described above. When the internal pressure is about to rise, the internal pressure can be absorbed by reversely deforming the internal pressure absorbing portion toward the outside of the storage cylinder.
Further, since the internal pressure absorbing portion is formed in the valve body, the size of the internal pressure absorbing portion can be easily secured widely.

  According to the present invention, it is possible to suppress an increase in the internal pressure of the storage cylinder portion when the pressing head is remounted on the restriction cylinder.

It is a longitudinal cross-sectional view of the discharger shown as one embodiment concerning the present invention. In the dispenser shown in FIG. 1, it is a figure which shows the state which the pressing head was located in the raising end position. FIG. 3 is a partial longitudinal cross-sectional view showing the main parts of the dispenser of FIGS. 1 and 2 in a state where the pressing head located at the rising end position is again mounted on the restriction cylinder.

Hereinafter, the discharger 1 according to an embodiment of the present invention will be described with reference to the drawings.
The dispenser 1 of this embodiment, as shown in FIGS. 1 and 2, can be moved downward to the mounting cap 21 mounted on the mouth W1 of the container body W and the mounting cap 21 in an upward biased state. A pump 24 having a stem 11 penetrating therethrough, a pressing head 16 mounted on the upper end of the stem 11 and having a discharge hole 16a for discharging the contents formed therein, and a pressing head 16 located at a lowering end position And a restricting cylinder 22 which is detachably mounted and restricts the upward movement of the pressing head 16 and the stem 11. The content is a liquid or the like that is more difficult to compress than air.
The mounting cap 21 is formed in a top cylindrical shape including an annular top wall portion 21 a. On the inner peripheral surface of the mounting cap 21, a female screw portion screwed to the mouth W1 is formed.

The pump 24 is linked to the vertical movement of the stem 11, and a cylinder 15 having a cylindrical piston 14 linked to the vertical movement of the stem 11, a sliding cylindrical portion 15a in which the piston 14 is fitted slidably in the vertical direction, And a lower valve body 18 having a valve body 34 for opening and closing the lower end opening of the cylinder 15.
The mounting cap 21, the stem 11, the regulating cylinder 22, the piston 14, and the cylinder 15 are disposed coaxially with the common axis. Hereinafter, this common axis is referred to as an axis O, a direction intersecting the axis O as viewed from the direction of the axis O is referred to as a radial direction, and a direction circling around the axis O is referred to as a circumferential direction.

The piston 14 is an annular connection that connects the outer cylinder 28 in sliding contact with the inner circumferential surface of the cylinder 15, the inner cylinder 29 disposed inside the outer cylinder 28, and the outer cylinder 28 and the inner cylinder 29 all around. And 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. The inner cylinder 29 is fitted in the lower end portion of the stem 11 so as to be vertically slidable.

  The cylinder 15 is located below the sliding cylinder 15a, has a smaller inside diameter than the inside diameter of the sliding cylinder 15a, and a lower cylinder from which the lower cylinder 18 is disposed and the lower cylinder 18b. And a connecting cylindrical portion 15c which protrudes toward the lower end of the housing cylindrical portion 15b and has a smaller diameter than the receiving cylindrical portion 15b.

A suction pipe 15e whose lower end opening is located at the bottom of the container body W is fitted in the connecting cylindrical portion 15c.
A flange portion 15d which protrudes outward in the radial direction is formed on the upper portion of the sliding cylindrical portion 15a over the entire circumference, and the flange portion 15d is disposed on the upper end opening edge of the opening W1 of the container main body W. An upper end portion of the sliding cylindrical portion 15 a located above the flange portion 15 d is inserted into the top wall portion 21 a of the mounting cap 21. The top wall 21a of the mounting cap 21 is disposed on the upper surface of the flange 15d.

  The cylinder 15 is formed with an introduction hole 20 which is opened in the radial direction and which communicates the inside of the container body W with the inside of the cylinder 15. In the example of illustration, the introductory hole 20 is formed in the part located below the flange part 15d among the upper parts of the sliding cylinder part 15a. The introduction hole 20 is closed by the outer peripheral surface of the outer cylinder 28 in a standby state where the push head 16 and the stem 11 are positioned at the rising end position as shown in FIG. In the illustrated example, the upper end and the lower end of the outer cylinder 28 are respectively formed with bulging parts that expand outward in the radial direction, and the introduction hole 20 is inserted into the outer cylinder 28 in the standby state described above. It is closed by being located between both the bulging parts of.

  The piston guide 17 includes a mounting portion 31 fitted in the lower portion of the stem 11. The mounting portion 31 protrudes downward from the lower end opening of the stem 11. The mounting portion 31 is positioned in the sliding cylindrical portion 15 a of the cylinder 15 with the piston guide 17 positioned at the lowering end position as shown in FIG. 1. The mounting portion 31 is arranged at intervals in the circumferential direction, and is radially inside each of the plurality of divided circumferential walls fitted in the lower portion of the stem 11 and the circumferential center portion of the plurality of divided circumferential walls. And ribs which project towards one another and are connected to one another on an axis O. The rib is disposed over the entire area in the direction of the axis O in the divided peripheral wall.

  The piston guide 17 includes a plug portion 13 which protrudes downward from the lower end portion of the mounting portion 31. The plug portion 13 is formed in a top cylindrical shape. The plug portion 13 may be formed solid. The mounting portion 31 extends upward from the top wall portion of the plug portion 13. The peripheral wall portion of the plug portion 13 is located radially outward of the divided peripheral wall of the mounting portion 31. A plurality of proximity protrusions 13a close to the inner peripheral surface of the sliding cylindrical portion 15a of the cylinder 15 are formed on the outer peripheral surface of the peripheral wall portion of the plug portion 13 at intervals in the circumferential direction. The radially outer end portion of the proximity projection 13 a is located radially outward of the inner peripheral surface of the receiving cylindrical portion 15 b of the cylinder 15. The proximity projection 13 a is located at the lower end portion in the sliding cylindrical portion 15 a of the cylinder 15 with the piston guide 17 located at the lowering end position. The proximity protrusion 13 a is disposed at an intermediate portion in the axial line O direction in the peripheral wall portion of the plug portion 13.

A lower portion of the peripheral wall portion of the plug portion 13 located below the proximity protrusion 13a is detachably fitted in the storage cylindrical portion 15b when the piston guide 17 is positioned at the lowering end position together with the pressing head 16 and the stem 11. Thus, the seal portion 12 is configured to shut off the communication between the inside of the receiving cylindrical portion 15b and the inside of the sliding cylindrical portion 15a.
An upper end portion of the biasing means 19 is disposed in the plug portion 13. After the discharge of the contents, when the stem 11 is restored and moved upward, the top wall portion of the plug portion 13 engages with the lower end of the piston 14, and the piston 14 is restored and moved upward.

The lower valve body 18 is disposed in the cylinder 15 at a portion located below the piston guide 17. The lower valve body 18 is disposed in the housing cylinder 15b. In the example of illustration, the upper end part of the lower valve body 18 is located in the lower end part of the sliding cylinder part 15a.
The lower valve body 18 includes a fitting portion 33 fitted in the receiving cylinder portion 15b, and a valve main body 34 disposed inside the fitting portion 33 and opening and closing the lower end opening of the cylinder 15.

The fitting portion 33 includes a lower portion 33a fitted in the lower end portion of the receiving cylindrical portion 15b, and an upper portion 33b positioned above the lower portion 33a.
The upper portion 33 b is located radially inward of the lower portion 33 a. The upper portion 33b is disposed on both sides radially sandwiching the axis O, and a pair of side plates facing each other, a middle plate connecting the side plates, and a top plate integrally connected to upper ends of the side plates and the middle plate. And. When viewed in the direction of the axis O, the pair of side plates and the middle plate have an H-shape as a whole, and the top plate has a circular shape circumscribing the pair of side plates. The lengths in the direction of the axis O of the pair of side plates and the middle plate are equal to each other. The positions of the pair of side plates and the middle plate in the direction of the axis O are equal to each other.
The lower portion 33a includes an annular body located at the lower end portion and continuously extending around the entire circumference, and a pair of connecting plates connecting the annular body and a pair of side plates in the upper portion 33b. The connecting plate connects the upper end opening edge of the annular body and the lower end edge of the side plate, and has a seat surface 33c facing upward.

  The valve main body 34 is mounted on the periphery of the lower end opening of the storage cylindrical portion 15 b on the inner surface of the storage cylindrical portion 15 b so as to be separated upward. The valve body 34 is disposed 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 in the lower portion 33 a of the fitting portion 33 via an elastically deformable connection piece. In the fitting portion 33, the upper portion 33b is inserted into the inside of the biasing means 19, and the lower end portion of the biasing means 19 is disposed on the seat surface 33c. The biasing means 19 biases the stem 11 and the piston guide 17 integrally upward.

  The lower valve body 18 is a check valve which keeps the lower end opening of the cylinder 15 closed at the time of pressurization in the cylinder 15 and opens the lower end opening of the cylinder 15 at the time of pressure reduction in the cylinder 15. As a result, the content in the cylinder 15 is prevented from returning from the lower end opening of the cylinder 15 into the container body W when the pressure in the cylinder 15 is pressurized, and the content in the container body W is reduced when the pressure in the cylinder 15 is reduced. It flows into the cylinder 15 from the lower end opening of the cylinder 15.

  The pressing head 16 includes a fitting cylinder 16b fitted to the upper end portion of the stem 11, and a discharge cylinder 16c projecting radially outward from the fitting cylinder 16b and having a discharge hole 16a formed at the tip thereof. And a screwing cylinder 16d surrounding the fitting cylinder 16b from the outer side in the radial direction. The discharge cylinder 16c penetrates the screwing cylinder 16d in the radial direction. The upper portion of the fitting cylinder 16b protrudes upward from the upper end portion of the stem 11, and in this upper portion, a locking projection 16e which protrudes outward in the radial direction and is in contact with the upper end opening edge of the stem 11 is formed ing. The locking projection 16 e protrudes radially outward from the upper end opening edge of the stem 11.

  The restricting cylinder 22 includes an externally fitted cylinder 22a externally fitted to the upper end portion of the cylinder 15, and an externally threaded cylinder 22b to which a screwed cylinder 16d of the push head 16 positioned at the lowered end position is screwed. The lower portion of the male screw cylinder 22b is inserted into the upper end portion of the cylinder 15, and the upper portion protrudes upward from the upper end portion of the cylinder 15, and a male screw portion is formed on the outer peripheral surface of the upper portion. On the outer peripheral surface of the lower portion of the male screw cylinder 22b and the inner peripheral surface of the upper end portion of the cylinder 15, there are formed rotation preventing portions that engage with each other.

  Here, the pressing head 16 is located at the lowering end position between the inner peripheral surface of each of the male screw cylinder 22 b of the restriction cylinder 22 and the sliding cylinder 15 a of the cylinder 15 and the outer peripheral surface of the stem 11. At the same time, a closing cylinder 23 for closing the introduction hole 20 of the cylinder 15 is disposed.

  At the lower end portion of the closing cylinder 23, a closing cylinder part 23a slidably fitted in the cylinder 15 is formed. The closed cylinder portion 23a protrudes downward from the male screw cylinder 22b and abuts on the inner circumferential surface of the cylinder 15 in the standby state where the push head 16 and the stem 11 are positioned at the rising end position as shown in FIG. At this time, the lower end opening edge of the closed cylinder portion 23 a is in contact with the upper end opening edge of the outer cylinder 28 of the piston 14. On the other hand, as shown in FIG. 1, when the stem 11 and the pressing head 16 are positioned at the lowering end position and the pressing head 16 is screwed to the regulating cylinder 22, the closed cylinder portion 23 a introduces the cylinder 15. The hole 20 is closed. In the illustrated example, a bulging portion that bulges outward in the radial direction is formed on each of the upper end portion and the lower end portion of the closed cylinder portion 23 a, and the state where the pressing head 16 is screwed to the restriction cylinder 22 Then, the introduction hole 20 is closed by being located between the both bulging portions of the closed cylinder portion 23a. An introduction passage 25 is formed between the outer peripheral surface of the stem 11 and the inner peripheral surface of the closed cylinder 23 for communicating the outside with the inner peripheral surface of the outer cylinder 28 of the piston 14. The upper end portion of the closing cylinder 23 is located above the male screw cylinder 22 b of the regulating cylinder 22 during the above-described standby state.

  The usage method of the dispenser 1 comprised as mentioned above is demonstrated.

First, by rotating the pressing head 16 located at the lowering end position about the axis O with respect to the regulating cylinder 22, the female screw portion of the screwing cylinder 16d of the pressing head 16 and the male screw of the male screw cylinder 22b of the regulating cylinder 22 Release the screwing of the part. At this time, the push head 16, the stem 11, and the piston guide 17 move up with respect to the cylinder 15, and the seal portion 12 of the piston guide 17 separates from the receiving cylindrical portion 15b of the cylinder 15, and slides with the inside of the receiving cylindrical portion 15b. The inside of the movable cylinder portion 15a communicates with the inside. Then, due to the upward biasing force of the biasing means 19, the piston guide 17, the stem 11, and the pressing head 16 are integrally lifted. In this process, the top wall portion of the plug portion 13 of the piston guide 17 engages with the lower end portion of the inner cylinder 29 of the piston 14, and the piston 14 also rises.
As a result, the pressure in the cylinder 15 is reduced, so that the lower valve body 18 opens the lower end opening of the cylinder 15, and the contents in the container body W flow into the cylinder 15 through the suction pipe 15e. Further, the upper end opening edge of the outer cylinder 28 of the piston 14 engages with the lower end opening edge of the closing cylinder portion 23 a of the closing cylinder 23 to raise the closing cylinder 23 and separate it upward from the introduction hole 20. A cylinder 28 covers the introduction hole 20 of the cylinder 15.

Then, when the pressing head 16 is pressed down and moved down together with the stem 11 and the piston guide 17, first, the top wall portion of the plug portion 13 of the piston guide 17 separates downward from the lower end of the inner cylinder 29 of the piston 14 Thus, the cylinder 15 and the stem 11 communicate with each other, and the lower end of the stem 11 abuts on the connecting portion 27 of the piston 14. Further, when the downward movement is continued, the piston 14 is also moved downward so that the contents in the cylinder 15 are adjacent to each other in the circumferential direction in the piston guide 17 while the piston 14 is separated downward from the introduction hole 20 It flows into the stem 11 through the space between the protrusions 13a, and is discharged from the discharge hole 16a.
Next, when the depression of the depression head 16 is released, the piston guide 17, the piston 14, the stem 11, and the depression head 16 are restored and moved upward by the upward biasing force of the biasing means 19 as described above. The contents in W flow into the cylinder 15.

  And, in the present embodiment, when the piston guide 17 is positioned at the lowered end position, the wall surface defining the closed space X with the inner surface of the storage cylinder 15b, the valve main body 34, and the storage cylinder 15b. When the pressing head 16 located at the rising end position is lowered to at least one of the above and mounted on the restricting cylinder 22, the internal pressure is absorbed so as to absorb an increase in the internal pressure of the housing cylindrical portion 15b by deforming reversibly. The portion 35 is formed. In the illustrated example, the wall surface of the piston guide 17 is an inner surface 13 b of the plug portion 13 that faces the inside of the storage cylindrical portion 15 b. The internal pressure absorbing portion 35 is formed on at least one of the inner surface 13b of the plug portion 13 and the valve main body 34, and is accommodated when the pressing head 16 located at the rising end position is lowered and mounted on the regulating cylinder 22. It is reversely deformed or elastically deformed toward the outside of the cylindrical portion 15b.

  In the illustrated example, the internal pressure absorbing portion 35 is formed in the valve main body 34. The internal pressure absorbing portion 35 is formed in a curved shape protruding toward the inner side, that is, the upper side, of the receiving cylindrical portion 15b, and is formed so as to be reversely deformable toward the outer side, that is, the lower side of the receiving cylindrical portion 15b. The internal pressure absorbing portion 35 is configured to be reversely deformed upward by an elastic restoring force when this pressing force is released after a downward pressing force is applied and the downward deformation is reversely deformed. Even if this pressing force is released, the downward deformation may be maintained.

  The valve main body 34 is formed in a top cylindrical shape, the top wall portion is an internal pressure absorbing portion 35, and the peripheral wall portion 36 is connected to the inner circumferential surface of the lower portion 33a of the fitting portion 33 via the connection piece. . The thickness of the internal pressure absorbing portion 35 is thinner than the thickness of the peripheral wall portion 36 of the valve main body 34. The internal pressure absorbing portion 35 is located below the lower end portion of the upper portion 33 b of the fitting portion 33. The internal pressure absorbing portion 35 enters the inside of the peripheral wall portion 36 of the valve main body 34 in a state of being reversely deformed downward, and is positioned above the lower end opening of the accommodation cylindrical portion 15b. The internal pressure absorbing portion 35 may enter the lower end opening of the storage cylindrical portion 15b in a state of being reversely deformed downward. The internal pressure absorbing portion 35 is opposed in the direction of the axis O over the entire area of the lower end opening of the accommodation cylindrical portion 15b. The lower end opening edge of the peripheral wall portion 36 of the valve main body 34 is mounted on the peripheral portion of the lower end opening of the receiving cylindrical portion 15b on the inner surface of the receiving cylindrical portion 15b so as to be separated upward.

Then, in order to mount the pressing head 16 located at the rising end position on the regulating cylinder 22 again, the pressing head 16 is pushed downward and the screwing cylinder 16 d of the pressing head 16 is inserted into the male screw cylinder 22 b of the regulating cylinder 22. In the pressed state, the pressing head 16 is rotated about the axis O, and the screwing cylinder 16d is screwed to the male screw cylinder 22b.
At this time, the upper end opening edge of the closing cylinder 23 is pushed downward by the locking projection 16e formed on the fitting cylinder 16b of the pressing head 16, the closing cylinder 23 descends, and the closing cylinder part 23a is an introduction hole. Block 20.
Further, at this time, the seal portion 12 of the piston guide 17 is fitted in the receiving cylindrical portion 15b of the cylinder 15, and the communication between the inside of the receiving cylindrical portion 15b and the inside of the sliding cylindrical portion 15a is cut off. In this process, when the internal pressure of the storage cylinder 15b is going to rise, as shown in FIG. 3, the internal pressure absorbing part 35 is reversely deformed downward to absorb the rise of the internal pressure. .

As described above, according to the dispenser 1 of the present embodiment, the internal pressure absorbing portion 35 is formed in the valve main body 34. Therefore, the push head 16 located at the rising end position is lowered and mounted on the restriction cylinder 22. In other words, when the internal pressure of the storage cylindrical portion 15b is to rise when the piston guide 17 located at the rising end position is lowered to fit the seal portion 12 into the storage cylindrical portion 15b, the internal pressure absorbing portion The downward deformation of the member 35 in the downward direction can absorb an increase in the internal pressure of the storage cylinder 15b. Therefore, the push head 16, the stem 11, the piston 14 and the piston guide 17 located at the rising end position can be made to reach the lowering end position, and the push head 16 is securely attached to the restricting cylinder 22 again. Can.
Moreover, since the internal pressure absorption part 35 is formed in the valve main body 34, the size of the internal pressure absorption part 35 can be easily secured widely.

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

For example, in the embodiment described above, the configuration is shown in which the pressing head 16 located at the lowered end position is detachably screwed as the regulating cylinder 22. However, the present invention is not limited thereto. The configuration may be changed as appropriate.
Further, the internal pressure absorbing portion 35 may be formed on the inner surface 13b of the plug portion 13 which defines the closed space X with the inner surface of the receiving cylindrical portion 15b when the piston guide 17 is positioned at the lowered end position. It may be formed in the storage cylinder 15b, or may be formed in all of the inner surface 13b of the plug 13, the valve body 34, and the storage cylinder 15b. When the internal pressure absorbing portion 35 is formed on the inner surface 13b of the plug portion 13, for example, the top wall portion of the plug portion 13 is formed into a curved surface shape projecting toward the inside of the storage cylindrical portion 15b. It may be formed so as to be capable of reverse deformation toward the outside.
Further, the internal pressure absorbing portion 35 is not limited to the configuration in which the entire top wall portion of the valve main body 34 or the entire top wall portion of the plug portion 13 is reversely deformed as described above, for example, the plug portion 13 and the valve main body 34 respectively In such a configuration, only the wall surface of the wall that defines the closed space X may be elastically deformed and recessed toward the outside of the storage cylinder 15b.
When the internal pressure absorbing portion is formed in the accommodating cylindrical portion 15b, the internal pressure absorbing portion elongates and deforms downward when the internal pressure of the accommodating cylindrical portion 15b tries to rise, whereby the accommodating cylindrical portion 15b is lowered. It may be extended toward For example, a bellows or the like may be employed as the internal pressure absorbing portion.
Moreover, as a content which is harder to compress than air, for example, body soap, hand soap, shampoo, rinse, conditioner and the like can be mentioned.

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

DESCRIPTION OF SYMBOLS 1 Dispenser 11 Stem 12 Seal part 13b Inner surface (wall surface) of plug part
14 piston 15 cylinder 15a sliding cylinder 15b accommodation cylinder 16 depression head 16a discharge hole 17 piston guide 18 lower valve body 21 mounting cap 22 restriction cylinder 24 pump 34 valve main body 35 internal pressure absorbing part W container main body W1 opening X closed space

Claims (3)

A mounting cap attached to the mouth of the container body;
A pump having a stem movably penetrated downward in the upper state in the mounting cap;
A pressing head mounted on an upper end portion of the stem and having a discharge hole formed to discharge the contents;
The pressing head located at the lower end position is detachably mounted, and is provided with a control cylinder that restricts the upward movement of the pressing head and the stem;
The pump is
A cylindrical piston linked to the vertical movement of the stem;
A cylinder having a sliding cylinder portion in which the piston is slidably fitted up and down;
A piston guide which is linked to the up and down movement of the stem and is inserted inside the piston;
A lower valve body having a valve body for opening and closing a lower end opening of the cylinder;
The cylinder is positioned below the sliding cylinder, and has an accommodating cylinder in which the inner diameter is smaller than the inner diameter of the sliding cylinder, and the lower valve body is disposed inside the cylinder.
When the piston guide is positioned at the lowering end position together with the pressing head and the stem, the piston guide is detachably fitted in the receiving cylinder, and a seal that blocks communication between the receiving cylinder and the sliding cylinder. A dispenser comprising a
In the piston guide, at least one of a wall surface defining a closed space with the inner surface of the receiving cylindrical portion, the valve body, and the receiving cylindrical portion when the piston guide is positioned at the lowered end position; When the pressing head located at the rising end position is lowered and mounted on the restricting cylinder, it is possible to form an internal pressure absorbing portion that absorbs an increase in the internal pressure of the accommodating cylindrical portion by deforming so as to be recoverable. Distinctive dispenser.   The internal pressure absorbing portion is formed on at least one of the wall surface of the piston guide and the valve main body, and when the pressing head located at the rising end position is lowered and mounted on the restriction cylinder, A discharger characterized by reverse deformation or elastic deformation toward the outside of a storage cylindrical portion.   The internal pressure absorbing portion is formed in the valve main body, is formed in a curved surface shape protruding toward the inside of the storage cylinder, and is formed so as to be capable of reverse deformation toward the outside of the storage cylinder. The dispenser according to claim 2, characterized in that

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