Ejector

Abstract

To improve recyclability. [Solution] The push head 10 comprises a head body 11 having a valve chamber A and a nozzle hole 17 opening forward from the valve chamber; a connecting cylinder member 12 having a support wall 18 with its front and back surfaces facing vertically, and a connecting cylinder 19 extending downward from the support wall and connected to the upper end of the stem 22; a valve member 13; a guide member 14 provided on the support wall and having a guide surface 14a that causes the rear end of the valve member to slide backward when the head body moves downward relative to the connecting cylinder member; and a biasing member 27 provided on the support wall and having a pair of left and right elastic pieces 27a located behind the guide member. As the valve member moves backward, the rear end of the valve member slides backward between the pair of left and right elastic pieces, and the first sliding portion 34 of the outer circumferential surface of the rear end of the valve member that slides against the elastic pieces is reduced in diameter as it moves backward.

Description

Technical Field

[0001] The present invention relates to a discharge device.

Background Art

[0002] As a discharge device in which a pressing head is mounted on a stem provided to be movable downward while being urged upward relative to a cylinder, there is known a configuration, for example, as shown in Patent Document 1 below, in which the pressing head includes: 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, the valve member opening and closing the nozzle hole as it moves back and forth; and a metal coil spring provided in the valve chamber, the coil spring supporting the valve member so as to be movable backward while urging the valve member forward. When the head main body is pressed, the valve member moves backward in the valve chamber while compressively 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, so that the content in the cylinder is discharged from the nozzle hole through the inside of the stem.

Prior Art Literature

Patent Literature

[0003]

Patent Document 1

Summary of the Invention

Problem to be Solved by the Invention

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

[0005] The present invention provides a discharge device 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 mounted on a stem that is provided to be movable downward in an upward biased state relative to a cylinder, 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, and a support wall whose front and back surfaces face in the vertical direction, a connecting cylinder that extends downward from the support wall and is connected to the upper end of the stem, and a connecting cylinder that extends upward from the support wall and is fitted to the first sliding cylinder so as to be vertically slidable and communicates with the inside of the connecting cylinder The device comprises a member, a valve member provided in the valve chamber so as to be movable back and forth and opening and closing the nozzle hole as it moves back and forth, a guide member provided on the support wall and having a guide surface on which the rear end of the valve member slides when the head body moves downward relative to the connecting cylinder member, thereby causing the valve member to move backward, and a biasing member provided on the support wall and having a pair of left and right elastic pieces located behind the guide member, wherein as the valve member moves backward, the rear end of the valve member slides backward between the pair of left and right elastic pieces, and the first sliding portion of the outer circumferential surface of the rear end of the valve member that slides against the elastic pieces is reduced in diameter as it moves backward.

[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 second sliding portion, which is located in front of the first sliding portion on the outer circumferential surface of the rear end of the valve member, slides along the guide surface, causing the valve member to move backward and the nozzle hole to open. The first sliding portion slides backward between a pair of left and right elastic pieces, elastically deforming the elastic pieces in the left-right direction. 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, since the first sliding portion of the valve member is reduced in diameter as it moves towards the rear, when the head body is released, the pair of elastic pieces on the left and right return to their original shape and deform in the left-right direction. As a result, a biasing force is applied to the first sliding portion of the valve member not only upward but also forward. This causes the head body to return to its original shape and move upward relative to the connecting cylinder member, while 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.

[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 biasing member has an elastic ring that is C-shaped and opens upward when viewed from the front-rear direction, and the pair of left and right elastic pieces may extend upward from both ends of the elastic ring.

[0011] Since the pair of left and right elastic pieces extend upward from both ends of an elastic ring that has a C-shape and opens upward when viewed from the front and rear, when the rear end of the valve member elastically deforms the pair of left and right elastic pieces in the left and right direction, not only the elastic pieces but also the elastic ring is elastically deformed. This makes it easy to adjust the pressing force applied to the head body required to move the head body downward relative to the connecting cylinder member, and the forward and upward biasing forces applied to the rear end of the valve member when the pressure on the head body is released. Since the biasing member is equipped with an elastic ring, when the first sliding portion of the valve member slides backward between a pair of left and right elastic pieces, while elastically deforming the elastic pieces in the left-right direction, it becomes easier to elastically deform the elastic pieces so that the gap in the left-right direction widens as it moves upward. This ensures that when the head body is released, an upward biasing force can be reliably applied to the first sliding portion of the valve member from the pair of left and right elastic pieces. [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 showing the standby state of a discharger according to one embodiment. [Figure 2] Figure 1 shows the biasing member as viewed from the front. [Figure 3] This is a longitudinal cross-sectional view showing the discharge state of a dispenser according to one embodiment. [Figure 4] Figure 3 shows the biasing member as viewed from the front. [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 this embodiment includes a push head 10 and a pump 20, as shown in Figure 1. All components of the push head 10 and the pump 20 are made of synthetic resin material.

[0015] The pressing head 10 comprises a head body 11, a connecting cylindrical member 12, a valve member 13, a guide member 14, and a biasing member 27. The pump 20 comprises 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 cylindrical member 12, mounting cap C, cylinder 21, stem 22, stem biasing member 23, piston 24, and piston guide 25 are each formed in a cylindrical shape and are disposed coaxially with a common axis.

[0016] Hereinafter, this common axis is referred to as axis O; the push-down head 10 side along the axis O and the opposite side thereof are respectively referred to as the upper side and the lower side; the direction along the axis O is referred to as the up-down direction. A direction intersecting the axis O when viewed from the up-down direction is referred to as the radial direction, and a direction circling around the axis O when viewed from the up-down 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 on the mouth portion W1 of the 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 the opening peripheral edge portion on the lower surface of the bottom wall of the cylinder 21. The upper end portion of the suction pipe P is liquid-tightly fitted into the connecting cylinder 21a. The lower end portion of the suction pipe P is positioned within the bottom portion of the container body W. Inside the cylinder 21, a check valve 26 is provided which is detachably seated upward on the opening peripheral edge portion of the upper surface of the bottom wall.

[0020] A fixed cylindrical member 38 is fitted and fixed inside the upper portion of the cylinder 21. The upper portion of the fixed cylindrical member 38 protrudes upward from the upper end opening of the cylinder 21. A flange portion 38a extending continuously over the entire circumference is formed at the upper end portion of the fixed cylindrical member 38. The lower surface of the flange portion 38a is disposed via a packing on the upper end opening edge of the mouth portion W1 of the container body W. The upper surface of the flange portion 38a abuts against the lower surface of the top wall of the mounting cap C. On the inner peripheral surface of the lower portion of the fixed cylindrical member 38, an annular receiving wall 38b that protrudes radially inward and extends continuously over the entire circumference is formed.

[0021] The stem 22 is mounted so as to be movable downward while being biased upward relative to the cylinder 21. The lower part of the stem 22 is inserted into the cylinder 21, and the upper part of the stem 22 protrudes upward from inside the cylinder 21. The lower end of the stem 22 has a larger diameter than the portion located above the lower end.

[0022] The stem biasing member 23 is a spring member made of synthetic resin that extends in the vertical direction. The lower end of the stem biasing member 23 is supported on the upper surface of the receiving wall 38b of the fixed cylindrical member 38 provided on the cylinder 21. The upper end of the stem biasing member 23 is supported on the lower surface of the support wall 18, which will be described later.

[0023] 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.

[0024] 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, which penetrate radially, are formed in the portion of the piston guide 25 located between the upper part and the base portion 25a, spaced apart in the circumferential direction.

[0025] Next, we will describe the press head 10.

[0026] 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.

[0027] 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.

[0028] 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 L 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.

[0029] The connecting cylindrical member 12 comprises a support wall 18, a connecting cylinder 19, a second sliding cylinder 33, and a peripheral wall 37.

[0030] The support wall 18 is formed in a plate shape with its front and back surfaces facing vertically. The support wall 18 is fitted into the main body cylinder 15 so as to be able to slide vertically. The support wall 18 has a vertically penetrating flow hole that opens toward the upper end opening of the stem 22. The connecting cylinder 19 extends downward from the support wall 18 and is connected to the upper end of the stem 22. Thus, the pressing 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 support wall 18 and is liquid-tightly fitted into the upper end of the stem 22. The second sliding cylinder 33 extends upward from the support 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 support 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 support wall 18. The peripheral wall 37 extends downward from the outer peripheral edge of the support wall 18. A downward-facing step is formed on the outer peripheral surface of the peripheral wall 37, and this step is engaged with a radially inward-bulging bulge 15b formed on the inner peripheral surface of the lower end of the main body cylinder 15. The upper end of the stem biasing member 23 is inserted inside the peripheral wall 37.

[0031] 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.

[0032] The guide member 14 is provided on the support wall 18 and has a guide surface 14a that causes the rear end of the valve member 13 to slide backward when the head body 11 moves downward relative to the connecting cylinder member 12. The guide member 14 is located behind the valve chamber cylinder 31. A pair of guide surfaces 14a are provided on the left and right sides, and they support both ends in the left-right direction on the outer circumferential surface of the rear end of the valve member 13 from below the valve member 13.

[0033] The guide member 14 extends upward from the support wall 18 and includes a vertical wall portion 28 formed in a plate shape with its front and back surfaces facing the front-rear direction. The left-right central portion of the vertical wall portion 28 is located in the same left-right direction as the central axis L of the valve member 13. The upper end surface of the vertical wall portion 28 is located below the rear end of the valve member 13. Two guide protrusions projecting upward are formed on the upper end surface of the vertical wall portion 28, spaced apart in the left-right direction. The two guide protrusions are separated by the same distance in the left-right direction from the central axis L of the valve member 13. A guide surface 14a is formed on the upper surface of the guide protrusions, and the guide surface 14a extends downward as it is directed towards the rear.

[0034] The biasing member 27 is provided on the support wall 18 and has a pair of left and right elastic pieces 27a located behind the guide member 14. As the valve member 13 moves backward, the rear end of the valve member 13 slides backward between the pair of left and right elastic pieces 27a, while elastically deforming the elastic pieces 27a outward in the left-right direction. At this time, the pair of left and right elastic pieces 27a elastically deform so that the gap between them in the left-right direction widens as they move upward.

[0035] In this embodiment, the biasing member 27 has a base portion 39 and an elastic ring 29. The base portion 39 is formed in an annular shape and is positioned and fixed on the upper surface of the support wall 18. The second sliding cylinder 33 and the vertical wall portion 28 are located inside the base portion 39, and the lower end of the first sliding cylinder 32 enters when the head body 11 moves downward relative to the connecting cylinder member 12. The elastic ring 29 is formed to be elastically deformable and has a C-shape that opens upward when viewed from the front-to-back direction. The elastic ring 29 extends upward from the rear end of the base portion 39. The pair of left and right elastic pieces 27a extend upward from both circumferential ends of the elastic ring 29.

[0036] Here, the first sliding portion 34 on the outer circumferential surface of the rear end of the valve member 13, which slides against the elastic piece 27a, is narrower in diameter as it extends towards the rear. The rear end surface of the first sliding portion 34 constitutes the rear end surface of the valve member 13 and is formed in a hemispherical shape with a projection towards the rear. As shown in Figures 1 and 2, the rear end of the first sliding portion 34 is sandwiched in the left-right direction by the front ends of a pair of elastic pieces 27a. The front end of the first sliding portion 34 is located in front of the elastic pieces 27a and reaches the front ends of the pair of elastic pieces 27a when the head body 11 moves downward relative to the connecting cylinder member 12, as shown in Figures 3 and 4. At this time, the first sliding portion 34 does not detach downward from the pair of elastic pieces 27a, but is biased upward by the restoring force of the pair of elastic pieces 27a, and the front end of the first sliding portion 34 is located at the lower ends of the pair of elastic pieces 27a.

[0037] The second sliding portion 35, which slides against the guide surface 14a on the outer circumferential surface of the rear end of the valve member 13, widens in diameter as it extends towards the rear. The second sliding portion 35 extends forward from the front end of the first sliding portion 34. The size of the second sliding portion 35 in the front-rear direction is smaller than the size of the first sliding portion 34 in the front-rear direction. The inclination angle of the second sliding portion 35 with respect to the central axis L of the valve member 13 is greater than the inclination angle of the first sliding portion 34 with respect to the central axis L. As shown in Figure 1, both ends of the second sliding portion 35 in the left-right direction at the lower end of the second sliding portion 35 abut against the upper end of the guide surface 14a, and as shown in Figure 3, when the head body 11 moves downward relative to the connecting cylinder member 12, it reaches the lower end of the guide surface 14a.

[0038] 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.

[0039] Next, we will explain the operation of the discharger 1.

[0040] When the head body 11 of the pressing head 10 is pressed, the stem 22 does not move downward relative to the cylinder 21, and the inner surface of the first sliding cylinder 32 slides against the outer surface of the second sliding cylinder 33, causing the head body 11 to move downward relative to the connecting cylinder member 12. At this time, the left and right ends of the lower end of the second sliding portion 35 of the valve member 13 slide downward on the guide surface 14a, causing the valve member 13 to move backward, the front end of the valve member 13 to move rearward from the nozzle hole 17, and the nozzle hole 17 to open. Meanwhile, the first sliding portion 34 slides downward while moving rearward between a pair of left and right elastic pieces 27a, elastically deforming the elastic pieces 27a in the left and right directions.

[0041] 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 case, the support wall 18 descends, causing the stem biasing member 23 to deform vertically in relation to the receiving wall 38b of the fixed cylindrical member 38, thereby applying an upward biasing force 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.

[0042] 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.

[0043] Furthermore, when the head body 11 is released from being pushed down, the first sliding portion 34 of the valve member 13 is reduced in diameter as it moves towards the rear. As the pair of left and right elastic pieces 27a deform inward in the left-right direction, a biasing force is applied to the first sliding portion 34 of the valve member 13 not only upward but also forward. As the head body 11 moves upward relative to the connecting cylinder member 12, the valve member 13 moves forward, and the front end of the valve member 13 is fitted into the nozzle hole 17 in a liquid-tight manner, thereby closing the nozzle hole 17.

[0044] As described above, according to the discharger 1 of this embodiment, when the head body 11 moves downward relative to the connecting cylinder member 12, the rear end of the valve member 13 slides on the guide surface 14a of the guide member 14, causing the valve member 13 to move backward. As the valve member 13 moves backward, the rear end of the valve member 13 slides backward between a pair of left and right elastic pieces 27a, and the first sliding portion 34 of the outer circumferential surface of the rear end of the valve member 13 that slides on the elastic pieces 27a decreases in diameter as it moves backward. Therefore, 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.

[0045] 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.

[0046] Since the pair of left and right elastic pieces 27a extend upward from both ends of the elastic ring 29, which has a C-shape that opens upward when viewed from the front and rear directions, when the rear end of the valve member 13 elastically deforms the pair of left and right elastic pieces 27a in the left and right directions, not only the elastic pieces 27a but also the elastic ring 29 is elastically deformed. This makes it easy to adjust the pressing force applied to the head body 11 required to move the head body 11 downward relative to the connecting cylinder member 12, and the forward biasing force and upward biasing force applied to the rear end of the valve member 13 when the pressure on the head body 11 is released.

[0047] Since the biasing member 27 is equipped with an elastic ring 29, when the first sliding portion 34 of the valve member 13 slides backward between a pair of left and right elastic pieces 27a, while elastically deforming the elastic pieces 27a in the left-right direction, it becomes easier to elastically deform the elastic pieces 27a so that the gap in the left-right direction widens as it moves upward. This ensures that when the head body 11 is released, an upward biasing force can be reliably applied to the first sliding portion 34 of the valve member 13 from the pair of left and right elastic pieces 27a.

[0048] 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.

[0049] For example, the stem biasing member 23 is configured to elastically deform as the stem 22 moves downward and apply an upward biasing force to the stem 22, and this configuration is not limited to the above embodiment and may be modified as appropriate. 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.

[0050] 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]

[0051] 1 Dispenser 10 Press head 11 Head body 12 Connecting cylindrical member 13 Valve member 14 Guide members 14a Guide surface 17 Nozzle holes 18 Supporting wall 19 Connecting tube 21 Cylinders 22 Stem 27. Biasing member 27a Elastic piece 29 Elastic ring 32 1st sliding tube 33 2nd sliding tube 34 First sliding part 35 Second sliding part 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 support wall with its front and back surfaces facing vertically, a connecting cylinder extending downward from the support wall and connected to the upper end of the stem, and a second sliding cylinder extending upward from the support 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, A guide member provided on the support wall, having a guide surface that causes the rear end of the valve member to slide when the head body moves downward relative to the connecting cylindrical member, thereby causing the valve member to move backward. The support wall is provided with a biasing member having a pair of left and right elastic pieces located behind the guide member, As the valve member moves backward, the rear end of the valve member slides backward between the pair of elastic pieces on the left and right. A discharger in which the first sliding portion of the outer circumferential surface of the rear end of the valve member, which slides against the elastic piece, decreases in diameter as it extends towards the rear.

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 biasing member has an elastic ring that is C-shaped and opens upward when viewed from the front-rear direction. The discharger according to claim 1 or 2, wherein the pair of left and right elastic pieces extend upward from both circumferential ends of the elastic ring.

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