Ejector

Abstract

To improve recyclability. [Solution] The pressing head 10 comprises a head body 11 having a valve chamber A and a nozzle hole 17 opening forward from the valve chamber, and a first sliding cylinder 32 protruding downward and communicating with the valve chamber; a connecting cylinder member 12 having a sliding wall 18 with its front and back surfaces facing vertically, a connecting cylinder 19 extending downward from the sliding wall and connected to the upper end of the stem, and a second sliding cylinder 33 extending upward from the sliding wall, fitted to the first sliding cylinder so as to be vertically slidable, and communicating with the inside of the connecting cylinder; and a lever member 14. Either the head body or the connecting cylinder member has a pressing portion 35 formed thereon that, when the head body moves downward relative to the connecting cylinder member, presses an elastic piece 36 formed on the other of the head body or the connecting cylinder member, causing the elastic piece to elastically deform so as to bias the head body upward relative to the connecting cylinder member.

Description

[Technical Field]

[0001] The present invention relates to a discharger. [Background Art]

[0002] As a discharger in which a pressing head is mounted on a stem provided to be movable downward relative to a cylinder in an upward biased state, for example, as disclosed in the following Patent Document 1, the pressing head comprises: a head main body formed with a valve chamber and a nozzle hole opening forward from the valve chamber; a valve member provided in the valve chamber to be movable back and forth, which opens and closes the nozzle hole as it moves back and forth; and a metal coil spring provided in the valve chamber, which supports the valve member in a forward biased state to allow the valve member to move backward. When the head main body is pressed down, the valve member moves backward in the valve chamber while compressing and deforming the coil spring in the front-rear direction, thereby opening the nozzle hole, and the stem descends relative to the cylinder to pressurize the inside of the cylinder, whereby the content in the cylinder is discharged from the nozzle hole through the stem. Such a configuration is known. [Prior Art Literature] [Patent Literature]

[0003] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2015-047546 [Summary of the Invention] [Problem to be Solved by the Invention]

[0004] However, conventional dischargers have a metal coil spring, and there is room for improvement in terms of recyclability.

[0005] The present invention provides a discharger capable of improving recyclability. [Means for Solving the Problem]

[0006] A discharger according to one aspect of the present invention is a discharger in which a push head is attached to a stem that is mounted on a cylinder so as to be movable downward in an upward biased state, wherein the push head has a head body having a valve chamber and a nozzle hole that opens forward from the valve chamber and a first sliding cylinder that protrudes downward and communicates with the valve chamber; a connecting cylinder member having a sliding wall whose front and back surfaces face in the vertical direction, a connecting cylinder that extends downward from the sliding wall and is connected to the upper end of the stem, and a second sliding cylinder that extends upward from the sliding wall, is fitted to the first sliding cylinder so as to be slidable up and down and communicates with the inside of the connecting cylinder; a valve member provided in the valve chamber so as to be movable back and forth and opens and closes the nozzle hole as it moves back and forth; and the valve The device comprises a lever member which bends forward from the rear end downward and has its lower end slidably positioned on the sliding wall, wherein the lever member is swingably supported such that it moves the valve member backward when the head body moves downward relative to the connecting cylinder member and moves the valve member forward when the head body moves upward relative to the connecting cylinder member, and a pressing portion is formed on either the head body or the connecting cylinder member which presses against an elastic piece formed on the other of the head body or the connecting cylinder member when the head body moves downward relative to the connecting cylinder member, thereby elastically deforming the elastic piece to bias the head body upward relative to the connecting cylinder member.

[0007] When the head body is pressed down, the first sliding cylinder of the head body slides against the second sliding cylinder of the connecting cylinder member, and the head body moves downward relative to the connecting cylinder member. At this time, the lower end of the lever member slides forward on the sliding wall of the connecting cylinder member, causing the lever member to swing so that the upper end of the lever member moves backward, moving the valve member backward and opening the nozzle hole. In addition, the stem descends relative to the cylinder, pressurizing the inside of the cylinder, and the contents of the cylinder are discharged through the stem and out of the nozzle hole. Here, the lever member is provided so as to be swingable that it moves the valve member backward when the head body moves downward relative to the connecting cylinder member, and moves the valve member forward when the head body moves upward relative to the connecting cylinder member. A pressing portion is formed on either the head body or the connecting cylinder member, which elastically deforms an elastic piece formed on the other of the head body or the connecting cylinder member when the head body moves downward relative to the connecting cylinder member, thereby biasing the head body upward relative to the connecting cylinder member. Therefore, when the head body is released, the stem returns to its original position relative to the cylinder, and the elastic piece deforms to its original position, pushing up the pressing portion. As the head body returns to its original position relative to the connecting cylinder member, the valve member moves forward and closes the nozzle hole. As described above, even without using a metal coil spring, the valve member can be moved back and forth in conjunction with the vertical movement of the head body relative to the connecting cylinder member to open and close the nozzle hole. This eliminates the need to disassemble and separate the push head when disposing of the discharger, thereby improving recyclability. A pressing portion is formed on either the head body or the connecting cylindrical member, and an elastic piece is formed on the other of the head body or the connecting cylindrical member. Since the elastic piece and the pressing portion are located on the outside of the valve chamber, it is possible to increase the thickness of the elastic piece without increasing the internal volume of the head body. This improves recyclability while maintaining the appearance and durability of the discharger.

[0008] The downward force applied to the head body required to move the head body downward relative to the connecting cylindrical member may be less than the downward force applied to the head body required to move the stem downward relative to the cylinder.

[0009] Since the pressing force applied to the head body is greater when moving the stem downward relative to the cylinder than when moving the head body downward relative to the connecting cylinder member, in the process of pressing the head body, first the head body is moved downward relative to the connecting cylinder member to open the nozzle hole, and then the stem is moved downward relative to the cylinder to pressurize the inside of the cylinder, making it possible to circulate the contents inside the cylinder upward through the stem, and thus the contents can be smoothly discharged from the nozzle hole.

[0010] The elastic piece is formed in a plate shape with its front and back surfaces facing radially, and the pressing portion may press the elastic piece radially when the head body moves downward relative to the connecting cylindrical member.

[0011] As the head body moves downward relative to the connecting cylinder member, the pressing part presses radially against a plate-shaped elastic piece whose front and back surfaces face radially. This suppresses an increase in the pressing force applied to the head body while ensuring a longer vertical movement stroke for the head body. [Effects of the Invention]

[0012] According to the above embodiment of the present invention, recyclability can be improved. [Brief explanation of the drawing]

[0013] [Figure 1] This is a longitudinal cross-sectional view of a discharger according to one embodiment. [Figure 2] Figure 1 shows the state in which the head body has been moved downward relative to the connecting cylindrical member. [Figure 3] Figure 1 shows the state in which the push head and stem are moved downward relative to the cylinder. [Modes for carrying out the invention]

[0014] An embodiment of the present invention will be described below with reference to the drawings. The discharger 1 of the present embodiment includes a pressing head 10 and a pump 20, as shown in FIGS. 1 to 3. All components constituting the pressing head 10 and the pump 20 are formed of a synthetic resin material.

[0015] The pressing head 10 includes a head main body 11, a connecting cylinder member 12, a valve member 13, and a lever member 14. The pump 20 includes a mounting cap C, a cylinder 21, a stem 22, a stem biasing member 23, a piston 24, and a piston guide 25. The connecting cylinder member 12, the mounting cap C, the cylinder 21, the stem 22, the piston 24, and the piston guide 25 are each formed in a cylindrical shape and disposed coaxially with a common axis.

[0016] Hereinafter, this common axis is referred to as axis O. The pressing head 10 side along the axis O and the opposite side are referred to as the upper side and the lower side, respectively, and the direction along the axis O is referred to as the vertical direction. A direction intersecting the axis O when viewed from the vertical direction is referred to as the radial direction, and a direction rotating around the axis O when viewed from the vertical direction is referred to as the circumferential direction.

[0017] First, the pump 20 will be described.

[0018] The mounting cap C is formed into a capped cylindrical shape having an annular top wall, and is mounted to a mouth portion W1 of a container body W.

[0019] The cylinder 21 is formed into a bottomed cylindrical shape having an annular bottom wall, and is inserted into the container body W. A connecting cylinder 21a extending downward is formed at an opening peripheral edge portion on the lower surface of the bottom wall of the cylinder 21. An upper end portion of a suction pipe P is liquid-tightly fitted into the connecting cylinder 21a. A lower end portion of the suction pipe P is located within a bottom portion of the container body W. A check valve 26, which is separably seated upward at an opening peripheral edge portion on the upper surface of the bottom wall, is provided inside the cylinder 21. An upper end portion of a cylinder 21 is formed with a flange portion 21b continuously extending over the entire circumference. A lower surface of the flange portion 21b is arranged on an upper opening edge of a mouth portion W1 of a container body W via a packing. An upper surface of the flange portion 21b is in contact with a lower surface of a top wall of a mounting cap C.

[0020] A stem 22 is provided to be movable downward relative to the cylinder 21 in an upward biased state. A lower portion of the stem 22 is inserted into the cylinder 21, and an upper portion of the stem 22 projects upward from the inside of the cylinder 21. A lower end portion of the stem 22 has a larger diameter than a portion located above the lower end portion. A stem pressing portion 27 is provided at an upper portion of the stem 22. The stem pressing portion 27 may be formed integrally with the stem 22.

[0021] The stem pressing portion 27 includes: a fixed cylindrical portion 27a that is externally fitted onto and fixed to the upper portion of the stem 22; an inner pressing cylindrical portion 27b extending downward from the fixed cylindrical portion 27a; and an outer pressing cylindrical portion 27c extending upward from a lower end portion of the inner pressing cylindrical portion 27b. The fixed cylindrical portion 27a, the inner pressing cylindrical portion 27b, and the outer pressing cylindrical portion 27c are arranged coaxially with an axis O. The inner pressing cylindrical portion 27b extends radially outward as it goes downward. The outer pressing cylindrical portion 27c extends radially outward as it goes upward. Upper end portions of the outer pressing cylindrical portion 27c and the inner pressing cylindrical portion 27b are respectively located at equivalent positions in the vertical direction.

[0022] A stem biasing member 23 includes an inner spring plate 28 and an outer spring plate 29 that sandwich the stem pressing portion 27 in the radial direction. The inner spring plate 28 and the outer spring plate 29 are each formed in a plate shape whose front and back surfaces face the radial direction. The inner spring plate 28 and the outer spring plate 29 are formed to be elastically deformable in the radial direction. A plurality of the inner spring plates 28 and a plurality of the outer spring plates 29 are respectively provided at intervals in the circumferential direction. Plate thicknesses of the inner spring plate 28 and the outer spring plate 29 are equal to each other.

[0023] The inner spring plate 28 extends upward from a fixed cylindrical portion 28a that is fitted and fixed within the upper end of the cylinder 21. The inner spring plate 28 protrudes upward from inside the cylinder 21. Of the inner spring plate 28, the upper end of the outer surface facing radially outward extends radially inward as it extends upward, and abuts against the lower end of the inner circumferential surface of the pressing inner cylindrical portion 27b. The outer spring plate 29 extends upward from the upper surface of the top wall of the mounting cap C. Of the outer spring plate 29, the upper end of the inner surface facing radially inward extends radially outward as it extends upward, and contacts the lower part of the outer circumferential surface of the pressing outer cylinder portion 27c. The upper ends of the outer spring plate 29 and the inner spring plate 28 are located at the same position in the vertical direction. The lower end of the outer spring plate 29 is located above the lower end of the inner spring plate 28.

[0024] The piston 24 is fitted into the cylinder 21 so as to be able to slide up and down. The piston 24 engages with the lower end of the stem 22 and slides up and down within the cylinder 21 in conjunction with the up and down movement of the stem 22. The piston 24 is formed in a double-cylinder shape having an inner cylinder and an outer cylinder. The outer cylinder of the piston 24 is fitted into the cylinder 21 so as to be vertically slidable. The upper end of the inner cylinder of the piston 24 is fitted into the lower end of the stem 22 so as to be vertically slidable.

[0025] The piston guide 25 is formed in a bottomed cylindrical shape. The upper part of the piston guide 25 is fitted and fixed inside the stem 22. The lower end of the piston guide 25 protrudes downward from the stem 22. A base portion 25a is formed at the lower end of the piston guide 25, protruding radially outward and extending continuously around its entire circumference. The lower end of the inner cylinder of the piston 24 is in liquid-tight contact with the upper surface of the base portion 25a, so as to be able to move away from it relatively upward. Multiple first communication holes 25b are formed in the portion of the piston guide 25 located between the upper part and the base portion 25a, passing through in the radial direction, at intervals in the circumferential and vertical directions.

[0026] Next, we will describe the press head 10.

[0027] The head body 11 comprises a main body cylinder 15 and a nozzle cylinder 16. The main body cylinder 15 is formed in a top-shaped cylinder and is arranged coaxially with axis O. Through holes 15a extending radially are formed in the peripheral wall of the main body cylinder 15. Hereinafter, when viewed from above, the direction in which the through-hole 15a is open in the radial direction will be referred to as the front, and the opposite direction will be referred to as the rear. When viewed from above, the direction perpendicular to the front-to-back direction will be referred to as the left-to-right direction.

[0028] A valve chamber cylinder 31 is formed on the inner circumferential surface of the main cylinder 15 at the opening edge of the through hole 15a, extending rearward and having a rear wall portion 31b that closes the rear end opening. The rear wall portion 31b is separated forward from the rear end of the inner circumferential surface of the main cylinder 15. The valve chamber cylinder 31 is formed integrally with the top wall of the main cylinder 15. The valve chamber cylinder 31 is provided with a first sliding cylinder 32 that extends downward from the valve chamber cylinder 31. The inside of the first sliding cylinder 32 is in communication with the inside of the valve chamber cylinder 31.

[0029] The nozzle cylinder 16 extends in the front-rear direction and is fitted and fixed within the through hole 15a and the valve chamber cylinder 31. The front end of the nozzle cylinder 16 protrudes forward from the peripheral wall of the main cylinder 15. The rear end opening edge of the nozzle cylinder 16 abuts against the front surface of the rear wall portion 31b of the valve chamber cylinder 31. The nozzle cylinder 16 has a second communication hole 16a that connects the inside of the nozzle cylinder 16 to the inside of the valve chamber cylinder 31. Multiple second communication holes 16a are provided at intervals around the central axis of the nozzle cylinder 16. The front end opening of the nozzle cylinder 16 is a nozzle hole 17 through which the contents are discharged. The inside of the nozzle cylinder 16 and the inside of the valve chamber cylinder 31 communicate with the outside through the nozzle hole 17 and also form a valve chamber A that communicates with the inside of the stem 22 through the first sliding cylinder 32.

[0030] The connecting cylinder member 12 comprises a sliding wall 18, a connecting cylinder 19, and a second sliding cylinder 33.

[0031] The sliding wall 18 is formed in a plate shape with its front and back surfaces facing vertically. The sliding wall 18 is fitted into the main body cylinder 15 so as to be able to slide vertically. The outer peripheral edge of the lower surface of the sliding wall 18 is locked to a bulge 15b formed on the inner circumferential surface of the lower end of the main body cylinder 15, which bulges radially inward. The lower surface of the sliding wall 18 abuts against the upper end opening edge of the stem 22. A flow hole that penetrates vertically is formed in the portion of the sliding wall 18 that is located radially inward from the inner circumferential surface of the stem 22. The connecting cylinder 19 extends downward from the sliding wall 18 and is connected to the upper end of the stem 22. Thus, the push head 10 is mounted on the stem 22 via the connecting cylinder 19. The connecting cylinder 19 extends downward from the opening periphery of the flow hole on the lower surface of the sliding wall 18 and is liquid-tightly fitted into the upper end of the stem 22. The second sliding cylinder 33 extends upward from the sliding wall 18 and is fitted into the first sliding cylinder 32 so as to be vertically slidable. The second sliding cylinder 33 extends upward from the opening periphery of the flow hole on the upper surface of the sliding wall 18 and is fitted into the first sliding cylinder 32 so as to be vertically slidable in a liquid-tight manner. The inside of the second sliding cylinder 33 is in communication with the connecting cylinder 19 through the flow hole in the sliding wall 18. On the upper surface of the sliding wall 18, a pair of wall portions 18b are formed, extending upward and sandwiching the second sliding cylinder 33 in the left-right direction. Guide pins 18a are formed on each wall portion 18b, projecting outward in the left-right direction. The guide pins 18a are located in the center of the sliding wall 18 in the front-rear direction.

[0032] The valve member 13 is provided in the valve chamber A so as to be movable back and forth, and opens and closes the nozzle hole 17 as it moves back and forth. The valve member 13 is formed in the shape of a solid rod extending in the front-rear direction. The front end of the valve member 13 is liquid-tightly fitted into the nozzle hole 17 so as to be removable. A sliding flange portion 13a is formed on the outer circumferential surface of the valve member 13, which slides liquid-tightly in the front-rear direction on the portion of the inner circumferential surface of the nozzle cylinder 16 that is located behind the second communication hole 16a. The valve member 13 penetrates the rear wall portion 31b of the valve chamber cylinder 31 in the front-rear direction, and the rear end of the valve member 13 is located in the portion of the main cylinder 15 that is located behind the rear wall portion 31b.

[0033] The lever member 14 bends forward as it extends downward from the rear end of the valve member 13, and its lower end is positioned to slide back and forth on the sliding wall 18 of the connecting cylinder member 12. The lever member 14 is pivotably provided to move the valve member 13 backward when the head body 11 moves downward relative to the connecting cylinder member 12, and to move the valve member 13 forward when the head body 11 moves upward relative to the connecting cylinder member 12. The lever member 14 is provided in the main cylinder 15 in a portion located outside the valve chamber A.

[0034] The lever member 14 comprises a vertical plate portion 14a and a horizontal plate portion 14b.

[0035] The vertical plate portion 14a is formed in a plate shape with its front and back surfaces facing in the front-to-back direction, and the rear end of the valve member 13 is connected to its upper end. The lower end of the vertical plate portion 14a is located above the sliding wall 18. The horizontal plate portion 14b is formed in a plate shape with its front and back surfaces facing the vertical direction. The horizontal plate portion 14b extends downward from the lower end of the vertical plate portion 14a toward the front. A notch is formed in the middle of the horizontal plate portion 14b in the left-right direction, penetrating in the vertical direction and opening toward the front. The first sliding cylinder 32, the second sliding cylinder 33, and the wall portion 18b of the sliding wall 18 are inserted into the notch. The horizontal plate portion 14b has a pair of bearing holes 14d that extend outward in the left-right direction from the inner surface of the notch and open to both end faces in the left-right direction of the horizontal plate portion 14b. The bearing holes 14d are elongated holes having a long axis that extends upward from front to rear when viewed from the left-right direction. Guide pins 18a formed in the wall portion 18b of the sliding wall 18 are inserted into the bearing holes 14d so as to be movable in the long axis direction of the bearing holes 14d. A pivot pin 14c is formed at the connection point between the vertical plate portion 14a and the horizontal plate portion 14b, projecting outward in the left-right direction. The pivot pin 14c is rotatably supported by a bearing plate 34, which is mounted within the peripheral wall of the main body cylinder 15 in a portion located below the valve chamber cylinder 31. The bearing plate 34 may be formed integrally with the main body cylinder 15.

[0036] In this embodiment, a pressing portion 35 is formed on either the head body 11 or the connecting cylindrical member 12, and an elastic piece 36 is formed on the other of the head body 11 or the connecting cylindrical member 12. When the head body 11 moves downward relative to the connecting cylindrical member 12, the pressing portion 35 presses against the elastic piece 36, causing the elastic piece 36 to elastically deform so that the head body 11 is biased upward relative to the connecting cylindrical member 12.

[0037] In the illustrated example, the pressing portion 35 is the outer circumferential surface of the lower end of the main cylinder 15 of the head body 11, and extends radially inward as it goes downward. The elastic piece 36 is formed on the connecting cylindrical member 12 and is in the shape of a plate with its front and back surfaces facing radially.

[0038] Here, the connecting cylindrical member 12 comprises a cylindrical portion 37, a ring portion 38, and a connecting piece 39. The cylindrical portion 37 is arranged coaxially with axis O and extends downward from the outer peripheral edge of the sliding wall 18. The lower end of the cylindrical portion 37 is located below the pressing portion 35. The ring portion 38 is arranged coaxially with axis O and is located below the lower end of the cylindrical portion 37. The outer circumferential surface of the ring portion 38 is located radially outward from the pressing portion 35. The connecting piece 39 connects the upper surface of the ring portion 38 and the outer circumferential surface of the lower end of the cylindrical portion 37, and extends upward from the radially outer side toward the radially inner side. Multiple connecting pieces 39 are provided at intervals in the circumferential direction.

[0039] The elastic piece 36 extends upward from the portion of the upper surface of the ring portion 38 located between adjacent connecting pieces 39 in the circumferential direction. The inner surface of the elastic piece 36 facing radially inward is radially outward from the cylindrical portion 37. The lower end of the pressing portion 35 is inserted between the inner surface of the elastic piece 36 and the outer surface of the cylindrical portion 37. The inner surface of the upper end of the elastic piece 36 extends radially outward from bottom to top and contacts the lower end of the pressing portion 35. As a result, when the head body 11 moves downward relative to the connecting cylindrical member 12, the pressing portion 35 presses the elastic piece 36 radially outward.

[0040] The downward force required to move the head body 11 downward relative to the connecting cylindrical member 12 is smaller than the downward force required to move the stem 22 downward relative to the cylinder 21.

[0041] Next, we will explain the operation of the discharger 1.

[0042] When the head body 11 of the pressing head 10 is pressed, the stem 22 does not move downward relative to the cylinder 21, the inner surface of the first sliding cylinder 32 slides against the outer surface of the second sliding cylinder 33, and the pressing portion 35 of the head body 11 causes the elastic piece 36 of the connecting cylinder member 12 to elastically deform outward in the radial direction, while the head body 11 moves downward relative to the connecting cylinder member 12. As a result, the front end of the horizontal plate portion 14b slides forward along the upper surface of the sliding wall 18 and is pushed upward against the upper surface of the sliding wall 18. This causes the guide pin 18a of the sliding wall 18 to move diagonally upward relative to the bearing hole 14d of the horizontal plate portion 14b, and the upper end of the vertical plate portion 14a to move backward, causing the lever member 14 to swing around the swing pin 14c. This causes the valve member 13 to move backward, the front end of the valve member 13 to move backward from the nozzle hole 17, and the nozzle hole 17 to open.

[0043] Subsequently, when the head body 11 is pressed further, the stem 22 moves downward together with the piston guide 25 and the pressing head 10. In this process, the stem pressing portion 27 slides downward against the stem biasing member 23, causing the pressing inner cylinder portion 27b to elastically deform the inner spring plate 28 radially inward, and the pressing outer cylinder portion 27c to elastically deform the outer spring plate 29 radially outward. As a result, an upward biasing force is applied to the stem 22 from the stem biasing member 23. Furthermore, after the upper surface of the base portion 25a of the piston guide 25 separates downward from the lower end of the inner cylinder of the piston 24, the piston 24 slides downward inside the cylinder 21, pressurizing the inside of the cylinder 21. The contents of the cylinder 21 then flow into the piston guide 25 through the gap between the upper surface of the base portion 25a of the piston guide 25 and the lower end of the inner cylinder of the piston 24, as well as through the first communication hole 25b. After passing through the stem 22, the connecting cylinder 19, the second sliding cylinder 33, the first sliding cylinder 32, the valve chamber cylinder 31, the second communication hole 16a, and the nozzle cylinder 16 in that order, the contents are discharged to the outside from the nozzle hole 17.

[0044] When the head body 11 is released, the stem biasing member 23 returns to its original shape, causing the upper surface of the base portion 25a of the piston guide 25 to abut against the lower end of the inner cylinder of the piston 24. As the piston 24 slides upward within the cylinder 21 by the piston guide 25, the stem 22, piston guide 25, and the pressing head 10 move upward. This reduces the pressure inside the cylinder 21, causing the check valve 26 to move upward away from the upper surface of the bottom wall of the cylinder 21, and the contents of the container body W are supplied into the cylinder 21 through the suction pipe P.

[0045] Furthermore, when the downward pressure on the head body 11 is released, the elastic piece 36 of the connecting cylinder member 12 slides against the pressing portion 35 of the head body 11 and deforms radially inward, causing the outer circumferential surface of the second sliding cylinder 33 to slide against the inner circumferential surface of the first sliding cylinder 32, and the head body 11 to move upward relative to the connecting cylinder member 12. At this time, the upper end of the vertical plate portion 14a is pulled up to the rear end of the valve member 13, and the guide pin 18a of the sliding wall 18 moves diagonally downward relative to the bearing hole 14d of the horizontal plate portion 14b, causing the lever member 14 to swing around the swing pin 14c so that the upper end of the vertical plate portion 14a moves forward. As a result, the valve member 13 moves forward, and the front end of the valve member 13 is fitted liquid-tightly into the nozzle hole 17, closing the nozzle hole 17.

[0046] As described above, in the discharger 1 according to this embodiment, the lever member 14 is provided so as to be swingable to move the valve member 13 backward when the head body 11 moves downward relative to the connecting cylinder member 12, and to move the valve member 13 forward when the head body 11 moves upward relative to the connecting cylinder member 12. A pressing portion 35 is formed on either the head body 11 or the connecting cylinder member 12, which, when the head body 11 moves downward relative to the connecting cylinder member 12, presses against the elastic piece 36 formed on the other of the head body 11 or the connecting cylinder member 12, and elastically deforms the elastic piece 36 so as to bias the head body 11 upward relative to the connecting cylinder member 12.

[0047] Therefore, when the head body 11 is released, the stem 22 returns to its original position relative to the cylinder 21, and the elastic piece 36 deforms to its original position, pushing up the pressing portion 35, causing the head body 11 to return to its original position relative to the connecting cylindrical member 12. As described above, even without using a metal coil spring, the valve member 13 can be moved back and forth in conjunction with the vertical movement of the head body 11 relative to the connecting cylinder member 12 to open and close the nozzle hole 17. This eliminates the need to disassemble and separate the push head 10 when disposing of the discharger 1, thereby improving recyclability.

[0048] A pressing portion 35 is formed on either the head body 11 or the connecting cylindrical member 12, and an elastic piece 36 is formed on the other of the head body 11 or the connecting cylindrical member 12. Since the elastic piece 36 and the pressing portion 35 are located on the outside of the valve chamber A, it is possible to increase the thickness of the elastic piece 36 without increasing the internal volume of the head body 11, thereby improving recyclability while maintaining the appearance and durability of the discharger 1.

[0049] Since the pressing force applied to the head body 11 is greater when moving the stem 22 downward relative to the cylinder 21 than when moving the head body 11 downward relative to the connecting cylinder member 12, in the process of pressing the head body 11, first the head body 11 is moved downward relative to the connecting cylinder member 12 to open the nozzle hole 17, and then the stem 22 is moved downward relative to the cylinder 21 to pressurize the inside of the cylinder 21, making it possible to circulate the contents inside the cylinder 21 upward through the stem 22, and allowing the contents to be smoothly discharged from the nozzle hole 17.

[0050] When the head body 11 moves downward relative to the connecting cylindrical member 12, the pressing portion 35 presses radially against the plate-shaped elastic piece 36, whose front and back surfaces face radially. This suppresses an increase in the pressing force applied to the head body 11 while ensuring a longer vertical movement stroke for the head body 11.

[0051] Furthermore, the technical scope of the present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[0052] For example, instead of providing a stem pressing portion 27 on the stem 22, a spring member made of synthetic resin that extends vertically and is provided between the fixed cylindrical portion 28a and the lower surface of the sliding wall 18 may be used as the stem biasing member 23, instead of the inner spring plate 28 and the outer spring plate 29. The pressing portion 35 may be formed on the connecting cylindrical member 12, and the elastic piece 36 may be formed on the head body 11. For example, the elastic piece 36 may be formed in the shape of a plate with its front and back surfaces facing vertically, and the pressing part 35 may be configured to press the elastic piece 36 downwards. The downward force applied to the head body 11 required to move the head body 11 downward relative to the connecting cylindrical member 12 may be greater than or equal to the downward force applied to the head body 11 required to move the stem 22 downward relative to the cylinder 21.

[0053] Furthermore, without departing from the spirit of the present invention, the components in the above embodiments may be replaced with well-known components as appropriate, and the above embodiments and modifications may be combined as appropriate. [Explanation of Symbols]

[0054] 1 Dispenser 10 Press head 11 Head body 12 Connecting cylindrical member 13 Valve member 14 Lever members 17 Nozzle holes 18 Sliding wall 19 Connecting tube 21 Cylinders 22 Stem 32 1st sliding tube 33 2nd sliding tube 35 Pressing part 36 Elastic pieces A Valve chamber

Claims

1. A discharger having a push head attached to a stem that is mounted on a cylinder so as to be movable downward while biased upward, The aforementioned pressing head is A head body having a valve chamber and a nozzle hole opening forward from the valve chamber, and a first sliding cylinder protruding downward and communicating with the valve chamber, A connecting cylinder member having a sliding wall with its front and back surfaces facing vertically, a connecting cylinder extending downward from the sliding wall and connected to the upper end of the stem, and a second sliding cylinder extending upward from the sliding wall, fitted to the first sliding cylinder so as to be vertically slidable, and communicating with the inside of the connecting cylinder, A valve member is provided in the valve chamber so as to be movable back and forth, and opens and closes the nozzle hole as it moves back and forth, The valve member comprises a lever member which bends forward from the rear end downward and its lower end is positioned to slide back and forth on the sliding wall, The lever member is provided so as to be swingable to move the valve member backward when the head body moves downward relative to the connecting cylinder member, and to move the valve member forward when the head body moves upward relative to the connecting cylinder member. Discharger, wherein one of the head body and the connecting cylindrical member has a pressing portion formed thereon that, when the head body moves downward relative to the connecting cylindrical member, presses against an elastic piece formed on the other of the head body and the connecting cylindrical member, causing the elastic piece to elastically deform so as to bias the head body upward relative to the connecting cylindrical member.

2. The discharger according to claim 1, wherein the downward force applied to the head body required to move the head body downward relative to the connecting cylindrical member is smaller than the downward force applied to the head body required to move the stem downward relative to the cylinder.

3. The elastic piece is formed in a plate shape with its front and back surfaces facing radially, The discharger according to claim 1 or 2, wherein the pressing portion presses the elastic piece radially when the head body moves downward relative to the connecting cylindrical member.

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