Ejector

Abstract

A single press of the dispensing head dispenses the liquid contents multiple times. [Solution] The pump mechanism 11 has a stem 13 and a discharge head 12 has a first space X1. The first space is provided with a discharge cylinder member 43 that extends in the front-rear direction and whose front end opening is a discharge hole 12b for the liquid contents, a valve member 44 that is disposed to be movable in the front-rear direction relative to the discharge cylinder member, and a first biasing member 45 that biases the valve member backward when it has moved forward relative to the discharge cylinder member. The portion of the first space located behind the valve member is a supply section X3 to which the liquid contents that have passed through the stem are supplied. The valve member moves in the front-rear direction in accordance with the increase or decrease in the internal pressure of the supply section. The valve member blocks communication between the inside of the discharge cylinder member and the supply section, and when it moves forward relative to the discharge cylinder member, it connects the inside of the discharge cylinder member and the supply section. The discharge cylinder member, valve member, and first biasing member are made of synthetic resin material.

Description

Technical Field

[0001] The present invention relates to a dispenser.

Background Art

[0002] Conventionally, as shown in Patent Document 1 below, there is a pump mechanism having a stem disposed movably downward in an upwardly biased state at the mouth of a container body in which a content liquid is stored, and the content liquid is sucked into the stem as the stem moves downward, and a discharge head provided at the upper end of the stem and having a discharge hole through which the content liquid passing through the stem is discharged. A dispenser provided with the same is known.

Prior Art Document

Patent Document

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When, for example, dry shampoo or the like is adopted as the content liquid and the dispenser is used to discharge the content liquid toward the scalp or skin, it is expected to exhibit a cleaning effect of removing dirt or a massage effect. However, with a conventional dispenser, if the pressing operation of the discharge head is repeated, the discharged range of the content liquid is not determined, and there is a possibility that the desired cleaning effect or massage effect may not be easily obtained.

[0005] The present invention provides a dispenser capable of discharging the content liquid a plurality of times by a single pressing operation of the discharge head.

Means for Solving the Problems

[0006] A discharger according to one aspect of the present invention comprises a pump mechanism that has a stem disposed at the mouth of a container body containing liquid contents so as to be movable downward in an upward biased state, and as the stem moves downward, the liquid contents are drawn up into the stem; and a discharge head provided at the upper end of the stem and having a first space into which the liquid contents that have passed through the stem are supplied, wherein the first space includes a discharge cylinder member that extends in the front-rear direction and whose front end opening is a discharge hole for the liquid contents, a valve member disposed so as to be movable in the front-rear direction relative to the discharge cylinder member, and relative to the discharge cylinder member A first biasing member is provided which biases the valve member, which has moved forward, to the rear. The portion of the first space located behind the valve member is a supply section to which the liquid contents that have passed through the stem are supplied. The valve member moves in the front-rear direction in accordance with the increase or decrease in the internal pressure of the supply section. The valve member blocks communication between the discharge cylinder member and the supply section, and when it moves forward relative to the discharge cylinder member, it allows communication between the discharge cylinder member and the supply section. The discharge cylinder member, the valve member, and the first biasing member are made of synthetic resin material.

[0007] By pressing down the discharge head and moving the stem downward, the liquid contents that have passed through the stem are supplied to the supply section in the first space, increasing the internal pressure of the supply section. This causes the valve member to move forward relative to the discharge cylinder member, creating communication between the discharge cylinder member and the supply section. As a result, the liquid contents that have passed through the stem and been supplied to the supply section are discharged to the outside through the discharge hole in the discharge cylinder member. Then, when the internal pressure of the supply section decreases, the valve member returns to its original position towards the rear, blocking communication between the discharge cylinder member and the supply section, and stopping the discharge of the liquid contents. As the internal pressure of the supply section decreases, if liquid continues to be supplied to the supply section from the stem side, the internal pressure of the supply section will rise again. As described above, the valve member will move forward relative to the discharge cylinder member, creating communication between the discharge cylinder member and the supply section, and the liquid supplied to the supply section from the stem side will be discharged to the outside through the discharge hole via the discharge cylinder member. Subsequently, the discharge of the liquid will be repeated intermittently as described above until the supply of liquid from the stem side to the supply section is stopped. Therefore, the liquid contents can be dispensed multiple times with a single press of the dispensing head. Since the discharge cylinder member, valve member, and first biasing member are made of synthetic resin material, separate disposal is unnecessary, and recyclability can be improved.

[0008] The discharge cylinder member is arranged to be movable in the front-rear direction, and a second biasing member made of synthetic resin is provided in the first space to bias the discharge cylinder member that has moved forward toward the rear, and the rearward biasing force applied by the second biasing member to the discharge cylinder member that has moved forward may be smaller than the rearward biasing force applied by the first biasing member to the valve member that has moved forward relative to the discharge cylinder member.

[0009] The discharge cylinder member is arranged to be movable in the front-rear direction, and a second biasing member is provided in the first space. The rearward biasing force applied by the second biasing member to the discharge cylinder member when it moves forward is smaller than the rearward biasing force applied by the first biasing member to the valve member when it moves forward relative to the discharge cylinder member. Therefore, when the discharge head is pressed down and the internal pressure of the supply section is increased as described above, the valve member does not move forward relative to the discharge cylinder member, and the discharge cylinder member and the valve member move together toward the front in the first space with communication between the inside of the discharge cylinder member and the supply section blocked. Subsequently, when the internal pressure of the supply section rises further and reaches a predetermined value, the valve member moves toward the front relative to the discharge cylinder member, and communication between the inside of the discharge cylinder member and the supply section is established. As a result, the liquid contents supplied to the supply section through the stem are discharged to the outside through the discharge hole in the discharge cylinder member. Then, as the internal pressure of the supply section decreases, as mentioned above, the backward biasing force applied by the second biasing member to the discharge cylinder member that has moved forward is smaller than the backward biasing force applied by the first biasing member to the valve member that has moved forward relative to the discharge cylinder member. As a result, the valve member returns to its original position backward before the discharge cylinder member, blocking communication between the discharge cylinder member and the supply section, stopping the discharge of the liquid contents, and then the discharge cylinder member and valve member move together to return to their original position backward in the first space. Consequently, as the internal volume of the supply section decreases and the internal pressure of the supply section increases, the discharge cylinder member and valve member move together forward in the first space. In this case, if the liquid contents continue to be supplied from the stem side to the supply section, the internal pressure of the supply section will rise further, causing the valve member to move forward relative to the discharge cylinder member, as described above, and the discharge cylinder member and the supply section to communicate with each other. The liquid contents supplied from the stem side to the supply section will then be discharged to the outside through the discharge hole via the discharge cylinder member. Subsequently, the discharge of the liquid contents will be repeated intermittently as described above until the supply of liquid contents from the stem side to the supply section is stopped. As described above, since the discharge cylinder member and the valve member will not communicate with the supply unit until they have moved forward as a single unit, it is possible to lengthen the interval between the stopping of the discharge of the liquid contents, and thus the desired cleaning and massaging effects can be reliably obtained.

[0010] The first biasing member is a protruding rib extending forward from the valve member, and the second biasing member is a protruding rib extending rearward from the front wall defining the first space. The discharge cylinder member has a first sliding surface on which the front end of the first biasing member slides in accordance with the forward and backward movement of the valve member, and a second sliding surface on which the rear end of the second biasing member slides in accordance with the forward and backward movement of the discharge cylinder member. The inclination angle of the second sliding surface with respect to the front-rear direction may be smaller than the inclination angle of the first sliding surface with respect to the front-rear direction.

[0011] A first biasing member that biases a valve member that has moved forward relative to the discharge cylinder member toward the rear is a protruding rib extending forward from the valve member, and a second biasing member that biases a discharge cylinder member that has moved forward toward the rear is a protruding rib extending backward from the front wall that defines the first space, and a first sliding surface on which the front end of the first biasing member slides and a second sliding surface on which the rear end of the second biasing member slides are formed on the discharge cylinder member, so that the first biasing member, the second biasing member, the first sliding surface and the second sliding surface can be provided in a simple configuration while keeping bulk down. Since the inclination angle of the second sliding surface with respect to the front-rear direction is smaller than the inclination angle of the first sliding surface with respect to the front-rear direction, the rearward biasing force applied by the second biasing member to the discharge cylinder member that has moved forward can be easily made smaller than the rearward biasing force applied by the first biasing member to the valve member that has moved forward relative to the discharge cylinder member.

[0012] The discharge head may be provided with a second space located behind the first space and communicating the first space and the stem, the second space being movably disposed in the front-rear direction, blocking communication between the second space and the first space at its foremost position, and moving rearward as liquid contents are supplied to the second space, and a third biasing member that biases the storage plunger forward.

[0013] Since the discharge head is equipped with a second space containing a storage plunger and a third biasing member, when the discharge head is pressed, the liquid contents that have passed through the stem are supplied to the second space before reaching the supply section of the first space. As the internal pressure of the second space increases, the storage plunger moves backward against the forward biasing force of the third biasing member, thereby connecting the second space and the first space, and the liquid contents of the second space are supplied to the supply section of the first space. Subsequently, as described above, the discharge and cessation of the liquid contents are repeated, and the liquid contents of the second space are pushed forward by the storage plunger. The liquid contents are continuously supplied to the supply section of the first space until the storage plunger reaches its furthest forward position and communication between the second space and the first space is severed. Therefore, a single press of the dispensing head allows for stable dispensing of the liquid contents multiple times.

[0014] The pump mechanism may include a lower piston that is linked to the up-and-down movement of the stem, an upper piston that is located above the lower piston and is linked to the up-and-down movement of the stem, a lower cylinder that houses the lower piston so that it can slide up and down, an upper cylinder that extends upward from the lower cylinder and whose interior is in vertical communication with the interior of the lower cylinder and has a smaller inner diameter than the lower cylinder, and houses the upper piston so that it can slide up and down, and a valve that, when the stem moves downward, allows communication between a lower chamber located below the lower piston and an upper chamber located above the lower piston within the lower cylinder, and blocks communication between the lower chamber and the upper chamber when the stem moves upward.

[0015] When the discharge head is pressed down and the stem moves downward, the liquid contents filling the upper cylinder are pressurized by the upper piston and supplied to the discharge head through the stem. As the stem moves downward, the valve allows communication between the lower and upper chambers in the lower cylinder, so the liquid contents of the lower chamber are supplied to the upper cylinder through the upper chamber. When the discharge head is released and the stem is returned to its original position, the valve mechanism blocks communication between the lower and upper chambers within the lower cylinder. As a result, the liquid contents of the upper chamber of the lower cylinder are pushed up by the lower piston, which moves upward with the stem, and supplied into the upper cylinder. Here, within the upper cylinder, the working chamber located below the upper piston increases in volume as the upper piston moves upward. However, because the inner diameter of the upper cylinder is smaller than that of the lower cylinder, the decrease in volume of the upper chamber of the lower cylinder is greater than the increase in volume of the working chamber of the upper cylinder. As a result, the working chamber of the upper cylinder and the upper chamber of the lower cylinder are pressurized, and the liquid contents of the working chambers and upper chambers are supplied to the discharge head. As described above, not only when the discharge head is pressed but also when the pressing of the discharge head is released, the content liquid can be supplied to the discharge head. By increasing the amount of the content liquid supplied to the discharge head by a single pressing operation of the discharge head, the number of intermittent discharges of the content liquid from the discharge head can be increased.

Advantages of the Invention

[0016] According to the above aspect of the present invention, the content liquid can be discharged a plurality of times by a single pressing operation of the discharge head.

Brief Description of the Drawings

[0017] [Figure 1] It is a longitudinal sectional view of a discharger according to an embodiment of the present invention. [Figure 2] In FIG. 1, (a) is an enlarged view of the main part (valve part) of the lower piston moving upward, and (b) is an enlarged view of the main part (valve part) of the lower piston moving downward. [Figure 3] It is an enlarged view of the discharge head and the intermittent discharge mechanism of FIG. 1. [Figure 4] It is a diagram showing the operation of the intermittent discharge mechanism of FIG. 3. [Figure 5] It is a diagram showing the operation of the intermittent discharge mechanism of FIG. 3.

Mode for Carrying Out the Invention

[0018] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the discharger 1 of the present embodiment includes a pump mechanism 11 and a discharge head 12.

[0019] The pump mechanism 11 includes a stem 13, a cylinder 14, a lower piston 15, and an upper piston 16. The stem 13, the cylinder 14, the lower piston 15, and the upper piston 16 are arranged such that their respective central axes are located on a common axis. '

[0020] Hereinafter, this common shaft will be referred to as the pump shaft O1, the discharge head 12 side along the pump shaft O1 will be referred to as the upper side, and the cylinder 14 side along the pump shaft O1 will be referred to as the lower side. The direction along the pump shaft O1 will be referred to as the vertical direction, the direction intersecting the pump shaft O1 when viewed from the vertical direction will be referred to as the radial direction, and the direction revolving around the pump shaft O1 when viewed from the vertical direction will be referred to as the circumferential direction. When viewed from above, the discharge head 12 extends from the upper end of the stem 13 in a direction intersecting the pump shaft O1. Hereinafter, the direction in which the discharge head 12 extends when viewed from above or below will be referred to as the front-to-back direction. Within the front-to-back direction, the side with the discharge hole 12b (described later) will be referred to as the front side, and the side opposite the discharge hole 12b will be referred to as the rear side. The direction perpendicular to both the vertical and horizontal directions is called the left-right direction.

[0021] The pump mechanism 11 is fixed to the container body W containing the liquid via the mounting cap C. The stem 13 is positioned at the mouth W1 of the container body W so as to be movable downward while biased upward, and the pump mechanism 11 draws the liquid into the stem 13 as the stem 13 moves downward. The mounting cap C is formed in a top-cylindrical shape with an annular top wall. The inner circumferential surface of the mounting cap C has a female thread that screws onto a male thread formed on the outer circumferential surface of the mouth W1 of the container body W. The upper part of the cylinder 14 is inserted inside the top wall of the mounting cap C. Here, a support member 17 that supports the trigger lever 18 is attached to the upper part of the cylinder 14.

[0022] The support member 17 comprises a surrounding cylindrical portion 21, a guide cylinder 22, a side wall portion 23, and a rear wall portion 24.

[0023] The surrounding cylindrical portion 21 is formed in a topped cylindrical shape with an annular top wall and is externally mounted on the upper part of the cylinder 14. On the lower surface of the top wall of the surrounding cylindrical portion 21, there is an inner hanging cylindrical portion 25 into which the stem 13 is inserted, and an outer hanging cylindrical portion 26 positioned between the inner hanging cylindrical portion 25 and the peripheral wall of the surrounding cylindrical portion 21. The inner hanging cylindrical portion 25 extends downward from the inner peripheral edge of the top wall. The outer hanging cylindrical portion 26 is fitted into the upper end of the cylinder 14. The guide tube 22 extends upward from the inner peripheral edge of the top wall of the surrounding tube portion 21. The stem 13 is inserted into the guide tube 22 so as to be movable in the vertical direction. The side wall portions 23 protrude upward from the rear of the surrounding cylindrical portion 21 and are arranged in pairs with a gap between them in the left-right direction. The pair of side wall portions 23 extend towards the rear as they move from bottom to top. A shaft body 27 is provided protruding outward in the left-right direction from the upper ends of the pair of side wall portions 23. The shaft body 27 is positioned behind the stem 13. The rear wall portion 24 connects the rear end edges of the side wall portions 23 in the left-right direction.

[0024] The trigger lever 18 is attached to the support member 17 via a shaft 27. This allows the trigger lever 18 to rotate around an axis extending in the left-right direction relative to the support member 17. The trigger lever 18 comprises a top plate portion 31, a front plate portion 32, and a side plate portion 33.

[0025] The top plate portion 31 covers the rear of the discharge head 12 from above. The top plate portion 31 is formed in a curved shape that protrudes upward when viewed from the left and right directions. The rear end of the top plate portion 31 abuts against the upper end of the rear wall portion 24 of the support member 17 from above the support member 17. As a result, the trigger lever 18 is restricted from rotating any further upward around the shaft 27. An opening 34 is formed in the front portion of the top plate 31, penetrating the top plate 31. The discharge head 12 is inserted into the opening 34. The front portion of the discharge head 12 protrudes forward from the top plate 31 through the opening 34. The opening 34 is formed in the central part of the top plate 31 in the left-right direction and opens forward. As a result, the front portion of the top plate 31 is divided into two branches in the left-right direction. The front panel 32 extends downward from the front edge of the bifurcated top panel 31 as it moves forward. The side plate portions 33 extend downward from both left and right edges of the top plate portion 31 and face each other in the left-right direction. The pair of side plate portions 33 face each other, sandwiching the discharge head 12 in the left-right direction. The pair of side plate portions 33 sandwich the upper parts of the pair of side wall portions 23 of the support member 17 in the left-right direction. On the inner surfaces of the pair of side plate portions 33 that face each other in the left-right direction, there are engagement grooves that open downward and engage with the shaft portion 12a of the discharge head 12.

[0026] When the trigger lever 18 is rotated downward around the shaft 27 of the support member 17, the trigger lever 18 pushes the shaft 12a of the discharge head 12 downward, causing the stem 13 to move downward.

[0027] The stem 13 is formed in a cylindrical shape that extends vertically. The stem 13 is inserted into the guide tube 22 and the inner hanging tube portion 25. The upper part of the stem 13 protrudes upward from inside the guide cylinder 22. A stopper 36 is detachably attached to the upper part of the stem 13. The stopper 36 is formed in a cylindrical shape that exhibits a C-shape when viewed from above or below. The lower end opening edge of the stopper 36 abuts against or is close to the upper end opening edge of the guide cylinder 22. The upper end opening edge of the stopper 36 abuts against or is close to the outer circumferential surface of the discharge head 12. A bottomed cylindrical piston cylinder 35 extending downward is connected to the stem 13. If the discharge head 12 is a separate part from the stem 13, the stem 13 and the piston cylinder 35 may be formed as a single unit. A communication hole 35a is formed on the outer surface of the piston cylinder 35 in the portion located below the stem 13, opening toward the inside of the cylinder 14. The communication hole 35a connects the inside of the cylinder 14 and the inside of the stem 13 through the piston cylinder 35.

[0028] The discharge head 12 is provided at the upper end of the stem 13. The discharge head 12 extends in the front-rear direction and protrudes both forward and backward relative to the stem 13. The discharge head 12 has a first space X1 and a second space X2 to which the liquid contents that have passed through the stem 13 are supplied. A shaft portion 12a protruding in the left-right direction is formed on the outer circumferential surface of the discharge head 12. The first space X1 and the second space X2 have discharge holes 12b, and an intermittent discharge mechanism 10 (described later) is provided to intermittently discharge the liquid contents from the discharge holes 12b.

[0029] The lower piston 15 is linked to the up-and-down movement of the stem 13. The lower piston 15 is attached to the lower end of the piston cylinder 35. The lower piston 15 is formed in a bottomed cylindrical shape with an annular bottom wall. The lower end of the piston cylinder 35 is liquid-tightly fitted into the bottom wall. The peripheral wall of the lower piston 15 is fitted into the lower cylinder 14a (described later) so as to be slidable in the vertical direction. The peripheral wall of the lower piston 15 is a valve portion 37 formed to be elastically deformable in the radial direction. The valve portion 37 extends radially outward as it is directed upward. When the stem 13 moves downward, the valve portion 37 elastically deforms radially inward, allowing communication between the lower chamber S1 located below the lower piston 15 and the upper chamber S2 located above the lower piston 15 within the lower cylinder 14a. When the stem 13 moves upward, the valve portion 37 returns to its original shape radially outward, blocking communication between the lower chamber S1 and the upper chamber S2.

[0030] The upper piston 16 is located above the lower piston 15 and is linked to the vertical movement of the stem 13. The upper piston 16 is located in the portion of the piston cylinder 35 that is above the lower piston 15 and the communication hole 35a. The upper piston 16 is formed in a topped cylindrical shape with an annular top wall. The inner circumferential surface of the top wall is integrally formed with the outer circumferential surface of the stem 13. The lower end opening edge of the inner hanging cylindrical portion 25 abuts against the upper surface of the top wall via a packing. The circumferential wall of the upper piston 16 is fitted into the upper cylinder 14b (described later) so as to be slidable in the vertical direction.

[0031] The cylinder 14 comprises an outer cylinder member 38 and an inner cylinder member 39 assembled inside the outer cylinder member 38.

[0032] The outer cylindrical member 38 comprises an upper cylindrical portion 38a, a lower cylindrical portion 38b, and a connecting cylindrical portion 38c.

[0033] The upper cylindrical portion 38a extends vertically. The upper part of the upper cylindrical portion 38a protrudes upward from the mouth W1 of the container body W. A support plate portion 38d is formed on the upper part of the upper cylindrical portion 38a, protruding radially outward and extending continuously around its entire circumference. The lower surface of the top wall of the mounting cap C abuts against the outer circumference of the upper surface of the support plate portion 38d. A packing is disposed between the lower surface of the support plate portion 38d and the upper opening edge of the mouth W1 of the container body W. A first air hole 38g is formed in the portion of the upper cylindrical portion 38a located inside the mouth W1, connecting the inside of the upper cylindrical portion 38a with the inside of the container body W.

[0034] The lower cylinder portion 38b has a smaller inner and outer diameter than the upper cylinder portion 38a and extends downward from the lower end of the upper cylinder portion 38a. The lower part of the coil spring 41 is inserted inside the lower cylinder portion 38b. The lower end of the coil spring 41 is supported on the upper surface of the stepped portion between the lower cylinder portion 38b and the connecting cylinder portion 38c. The coil spring 41 is arranged to straddle the lower parts of the lower cylinder portion 38b and the upper cylinder portion 38a. The upper end of the coil spring 41 is supported on the lower surface of the bottom wall of the lower piston 15. The coil spring 41 biases the stem 13 upward via the lower piston 15 and the piston cylinder 35. At the lower end of the lower cylinder portion 38b, a tapered valve seat 38e is formed, with its inner diameter decreasing as it extends downward. A valve body 42 is seated on the valve seat 38e so as to be able to move upward. The valve body 42 is a so-called ball valve, formed in a spherical shape. However, the valve body 42 may also be a check valve using various valve bodies instead of a ball valve.

[0035] The connecting cylinder portion 38c has a smaller inner and outer diameter than the lower cylinder portion 38b and extends downward from the lower end of the lower cylinder portion 38b. An attachment 38f with a pipe P attached is mounted on the connecting cylinder portion 38c. The pipe P connects the inside of the container body W and the inside of the cylinder 14. Furthermore, a dual-purpose adapter (not shown) for use in both upright and inverted positions may be connected to the connecting cylinder portion 38c to supply the liquid contents into the cylinder 14 when negative pressure is created inside the cylinder 14, regardless of whether the discharger 1 is upright or inverted.

[0036] The inner cylinder member 39 is fitted into the upper cylinder portion 38a of the outer cylinder member 38. The inner cylinder member 39 includes a lower cylinder 14a that houses the lower piston 15 so that it can slide up and down, and an upper cylinder 14b that houses the upper piston 16 so that it can slide up and down.

[0037] The lower cylinder 14a is formed in a cylindrical shape that extends vertically. In the upper cylindrical portion 38a of the outer cylindrical member 38, the fitting position of the lower cylinder 14a is located below the first air hole 38g. The lower end opening edge of the lower cylinder 14a abuts against the upper surface of the stepped portion between the upper cylindrical portion 38a and the lower cylindrical portion 38b. The upper cylinder 14b is formed in a cylindrical shape that extends vertically. The upper cylinder 14b extends upward from the upper end of the lower cylinder 14a. The interiors of the upper cylinder 14b and the lower cylinder 14a are in vertical communication. The upper cylinder 14b has a smaller inner and outer diameter than the lower cylinder 14a. The lower end of the upper cylinder 14b is liquid-tightly fitted and fixed inside the upper end of the lower cylinder 14a.

[0038] The upper cylinder 14b has a second air hole 39c that connects the inside and outside of the upper cylinder 14b. The second air hole 39c communicates with the first air hole 38g through the gap between the outer circumferential surface of the upper cylinder 14b and the inner circumferential surface of the upper cylindrical portion 38a. The second air hole 39c is located below the upper piston 16 and is open when the stem 13 is in the raised end position. The upper end of the upper cylinder 14b is provided with a fixed cylinder 39d that extends upward and protrudes upward from within the upper cylindrical portion 38a of the outer cylindrical member 38. The surrounding cylindrical portion 21 is attached to the fixed cylinder 39d, and the outer hanging cylindrical portion 26 is fitted inside the fixed cylinder 39d.

[0039] When operating the discharger 1 with the above configuration, first remove the stopper 36 from the top of the stem 13, so that the trigger lever 18 and the stem 13 can move downward. Next, when the trigger lever 18 is rotated downward around the shaft 27, and the stem 13 is moved downward against the upward biasing force, the lower piston 15 and the upper piston 16 also move downward, pressurizing the inside of the cylinder 14 with the valve body 42 seated on the valve seat 38e. At this time, the liquid contents that were filled in the upper cylinder 14b are pressurized by the upper piston 16, flow into the piston cylinder 35 through the communication hole 35a of the piston cylinder 35, and then rise up inside the stem 13 and are supplied into the discharge head 12. Furthermore, as shown in Figure 2(b), the valve portion 37 of the lower piston 15 elastically deforms radially inward, allowing communication between the lower chamber S1 located below the lower piston 15 and the upper chamber S2 located above the lower piston 15 within the lower cylinder 14a. As a result, the fluid contents of the lower chamber S1 are supplied through the upper chamber S2 to the working chamber S3 located below the upper piston 16 within the upper cylinder 14b.

[0040] When the trigger lever 18 is released and the stem 13 moves upward with the lower piston 15 due to the upward biasing force, the lower chamber S1 of the lower cylinder 14a becomes negative pressure, and the valve portion 37 deforms to its original shape radially outward, as shown in Figure 2(a), blocking communication between the lower chamber S1 and the upper chamber S2. As a result, the liquid inside the upper chamber S2 is pushed up by the lower piston 15 moving upward with the stem 13 and supplied into the working chamber S3 of the upper cylinder 14b. When the lower chamber S1 of the lower cylinder 14a becomes negative pressure, the valve body 42 moves upward away from the valve seat 38e, the liquid contents in the container body W are drawn up into the cylinder 14, and outside air is drawn into the container body W through the gap between the stem 13 and the guide cylinder 22, the gap between the stem 13 and the inner hanging cylindrical portion 25, the second air hole 39c, and the first air hole 38g, thereby eliminating the negative pressure inside the container body W.

[0041] Here, in the working chamber S3 of the upper cylinder 14b, the volume increases due to the upper piston 16 moving upward together with the stem 13. However, since the inner diameter of the upper cylinder 14b is smaller than the inner diameter of the lower cylinder 14a, the decrease in the volume of the upper chamber S2 of the lower cylinder 14a is greater than the increase in the volume of the working chamber S3. As a result, the internal pressure of the working chamber S3 and the upper chamber S2 becomes pressurized, and the liquid contents of the working chamber S3 and the upper chamber S2 are supplied to the discharge head 12 through the communication hole 35a, the piston cylinder 35, and the stem 13.

[0042] Therefore, the liquid contents can be discharged from the discharge port 12b not only when the stem 13 is moved downward, but also when it is moved upward to its original position.

[0043] Next, the discharge head 12 and the intermittent discharge mechanism 10 will be described with reference to Figures 3 to 5.

[0044] The discharge head 12 comprises a first lid 61, a first relay section 62, a second relay section 63, and a second lid section 64. The first relay section 62 and the second relay section 63 may be formed integrally. The first lid section 61, the first relay section 62, the second relay section 63, and the second lid section 64 are arranged coaxially with a common axis extending in the front-rear direction.

[0045] Hereinafter, the common axis will be referred to as the central axis O2, the direction that intersects the central axis O2 when viewed from the front-to-back direction will be referred to as the discharge radial direction, and the direction that circles around the central axis O2 when viewed from the front-to-back direction will be referred to as the discharge circumferential direction.

[0046] The discharge head 12 is configured with a first cover 61, a first relay section 62, a second relay section 63, and a second cover section 64 arranged in this order from front to rear. The space enclosed by the first cover section 61 and the first relay section 62 contains the first space X1, and the space enclosed by the second relay section 63 and the second cover section 64 contains the second space X2. The second space X2 is located behind the first space X1 and connects the inside of the first space X1 with the inside of the stem 13. Note that the discharge head 12 does not necessarily have to have the second space X2.

[0047] The second relay section 63 is formed in a cylindrical shape extending in the front-rear direction and protrudes both forward and backward relative to the upper end of the stem 13. The inside of the second relay section 63 is in communication with the inside of the stem 13. The second relay section 63 is formed in a cylindrical shape with openings at both ends in the front-rear direction. On the inner circumferential surface of the second relay section 63, a ring-shaped valve seat portion 23a is formed in the portion located forward of the upper end opening of the stem 13, protruding inward in the discharge diameter direction. The second lid portion 64 is formed in a horizontal, bottomed cylindrical shape with a closed rear end, and is liquid-tightly fitted into the rear end of the second relay portion 63. The first relay section 62 is formed in a cylindrical shape extending in the front-rear direction. The first relay section 62 is formed in a cylindrical shape with both ends in the front-rear direction open. The rear part of the first relay section 62 is fitted to the front part of the second relay section 63. The front part of the first relay section 62 has a larger inner diameter and outer diameter than the rear part of the first relay section 62. The first lid portion 61 is formed in a horizontal, top-closed cylindrical shape with a closed front end and is liquid-tightly fitted into the first relay portion 62. The rear surface of the top wall of the first lid portion 61 is located in front of the front end opening edge of the first relay portion 62. The first lid portion 61 covers the outer peripheral surface of the front part of the first relay portion 62 over its entire length in the front-rear direction and is located in front of the rear part of the first relay portion 62.

[0048] The intermittent discharge mechanism 10 comprises a discharge cylinder member 43 having a discharge hole 12b, a valve member 44, a first biasing member 45, a second biasing member 46, a storage plunger 47, and a third biasing member 48. The intermittent discharge mechanism 10 does not necessarily have to include the second biasing member 46, the storage plunger 47, and the third biasing member 48.

[0049] The discharge cylinder member 43, valve member 44, first biasing member 45, and second biasing member 46 are provided in the first space X1, while the storage plunger 47 and third biasing member 48 are provided in the second space X2. The discharge cylinder member 43, valve member 44, first biasing member 45, second biasing member 46, and storage plunger 47 are formed from synthetic resin material.

[0050] The storage plunger 47 is disposed in the second space X2 so as to be movable in the front-rear direction. The storage plunger 47 is formed in a horizontally oriented, top-closed cylindrical shape with its front end closed. The storage plunger 47 is disposed coaxially with the central axis O2. The storage plunger 47 is located in the portion of the second relay section 63 that is located behind the valve seat section 23a. The front end of the storage plunger 47 is in liquid-tight contact with the valve seat portion 23a from behind the valve seat portion 23a. At its foremost position, the storage plunger 47 is in contact with the valve seat portion 23a, blocking communication between the second space X2 and the first space X1. The second space X2 is the portion of the second relay portion 63 located behind the valve seat portion 23a. A sliding portion 47a is formed at the rear end of the storage plunger 47, protruding outward in the discharge radial direction and fitted into the second relay portion 63 so as to be slidable back and forth. The sliding portion 47a is located behind the upper end opening of the stem 13. As the liquid contents are supplied from the upper end opening of the stem 13 to the second space X2, the storage plunger 47 moves backward while the sliding portion 47a slides along the inner circumferential surface of the second relay portion 63.

[0051] The third biasing member 48 is a coil spring disposed between the rear end of the storage plunger 47 and the bottom wall of the second lid 64. The third biasing member 48 is disposed coaxially with the central axis O2. The third biasing member 48 biases the rearward-moving storage plunger 47 forward. The third biasing member 48 biases the storage plunger 47 forward from a standby state before the discharge head 12 is pressed down. Although the third biasing member 48 is described as a metal coil spring, a resin spring or other elastic material may also be used.

[0052] The discharge cylinder member 43 extends in the front-rear direction, and its front end opening is the discharge hole 12b for the liquid contents. The discharge cylinder member 43 is located in front of the rear of the first relay section 62. The discharge cylinder member 43 is arranged to be movable in the front-rear direction. The discharge cylinder member 43 may also be fixed in place within the first space X1. The discharge cylinder member 43 comprises a front discharge cylinder 51 and a rear discharge cylinder 52. The front discharge cylinder 51 and the rear discharge cylinder 52 are arranged coaxially with the central axis O2. The front discharge cylinder 51 and the rear discharge cylinder 52 may be formed as a single unit.

[0053] The rear discharge cylinder 52 is formed in the shape of a closed-bottom cylinder with its rear end closed. An opening / closing cylinder 52a is formed on the outer circumferential surface of the rear end of the rear discharge cylinder 52, projecting toward the rear. The opening / closing cylinder 52a extends outward in the discharge diameter direction as it approaches the rear. The opening / closing cylinder 52a blocks communication between the front part of the first relay section 62 and the rear part of the first relay section 62. The rear end of the opening / closing cylinder 52a is in liquid-tight contact with the peripheral edge of the front end opening of the rear part of the first relay section 62 within the front part of the first relay section 62. An inlet hole 52b is formed at the rear of the rear discharge cylinder 52, penetrating in the discharge diameter direction. Multiple inlet holes 52b are provided at intervals in the discharge circumferential direction.

[0054] The front discharge cylinder 51 is formed in a cylindrical shape with openings at both ends in the front-rear direction. The front part of the rear discharge cylinder 52 is liquid-tightly fitted inside the rear part of the front discharge cylinder 51. The front end opening of the front discharge cylinder 51 is a discharge hole 12b through which the liquid contents are discharged to the outside. A regulating projection 51b is formed at the front end of the front discharge cylinder 51, projecting outward in the discharge radial direction. The regulating projection 51b is set back from the rear surface of the top wall of the first lid 61. A surrounding cylinder 51a is provided at the rear end of the front discharge cylinder 51, projecting rearward and surrounding the rear part of the rear discharge cylinder 52 from the outside in the discharge radial direction. The rear end of the surrounding cylinder 51a is located in front of the rear end of the rear discharge cylinder 52.

[0055] The valve member 44 is arranged to be movable in the front-rear direction relative to the discharge cylinder member 43. The portion of the first space X1 located behind the valve member 44 is the supply section X3 to which the liquid contents that have passed through the stem 13 and the second space X2 are supplied. The valve member 44 moves in the forward and backward direction in accordance with the increase or decrease in the internal pressure of the supply unit X3. The valve member 44 blocks communication between the discharge cylinder member 43 and the supply unit X3, and when it moves forward relative to the discharge cylinder member 43, it allows communication between the discharge cylinder member 43 and the supply unit X3.

[0056] The valve member 44 includes a sliding cylinder 53 and a closing cylinder 54. The sliding contact cylinder 53 is located outside the surrounding cylinder 51a in the discharge radial direction and is liquid-tightly fitted within the front part of the first relay section 62 so as to be slidable back and forth. The closing cylinder 54 is located inside the sliding contact cylinder 53 in the discharge radial direction. The front end of the closing cylinder 54 is liquid-tightly fitted within the surrounding cylinder 51a so as to be slidable back and forth. The rear end of the closing cylinder 54 is in liquid-tight contact with the outer circumferential surface of the opening / closing cylinder 52a.

[0057] The first biasing member 45 biases the valve member 44, which has moved forward relative to the discharge cylinder member 43, backward. The first biasing member 45 is a protruding rib extending forward from the valve member 44. The first biasing member 45 may be formed in a cylindrical shape extending in the front-rear direction, or it may be composed of a plurality of plates extending in the front-rear direction and spaced apart in the discharge circumferential direction. The first biasing member 45 extends forward from the front end opening edge of the sliding contact cylinder 53 and is formed integrally with the sliding contact cylinder 53. The first biasing member 45 surrounds the surrounding cylinder 51a from the outside in the discharge radial direction.

[0058] The second biasing member 46 biases the discharge cylinder member 43, which has moved forward, backward. The backward biasing force applied by the second biasing member 46 to the discharge cylinder member 43, which has moved forward, is smaller than the backward biasing force applied by the first biasing member 45 to the valve member 44, which has moved forward relative to the discharge cylinder member 43. The second biasing member 46 is a protruding rib extending rearward from the rear surface of the top wall of the first lid portion 61 (the front wall defining the first space X1). The second biasing member 46 may be formed in a cylindrical shape extending in the front-rear direction, or it may be composed of a plurality of plates extending in the front-rear direction and spaced apart in the discharge circumferential direction. The length of the second biasing member 46 is shorter than the length of the first biasing member 45. The inner diameter and outer diameter of the second biasing member 46 are the same as the inner diameter and outer diameter of the first biasing member 45.

[0059] Here, the discharge cylinder member 43 has a first sliding surface 43a on which the front end of the first biasing member 45 slides as the valve member 44 moves back and forth, and a second sliding surface 43b on which the rear end of the second biasing member 46 slides as the discharge cylinder member 43 moves back and forth. The inclination angle of the second sliding surface 43b with respect to the front and rear direction is smaller than the inclination angle of the first sliding surface 43a with respect to the front and rear direction. The first sliding surface 43a extends outward in the discharge radial direction from the outer peripheral surface of the rear end of the front discharge cylinder 51 of the discharge cylinder member 43 as it moves forward. The second sliding surface 43b extends inward in the discharge radial direction from the front end of the first sliding surface 43a as it moves forward. The size of the first sliding surface 43a in the front-rear direction is smaller than the size of the second sliding surface 43b in the front-rear direction. The first sliding surface 43a and the second sliding surface 43b are the sides of a plate-like body whose front and back surfaces face the discharge circumferential direction and which have a triangular shape when viewed from the discharge circumferential direction.

[0060] In the discharge head 12 and intermittent discharge mechanism 10 configured as described above, when the trigger lever 18 is rotated downward around the shaft 27 and the discharge head 12 is pushed down, the stem 13 is moved downward against an upward biasing force, the liquid contents are supplied to the second space X2 from the upper end opening of the stem 13, the internal pressure of the second space X2 increases, and the storage plunger 47 moves backward against the forward biasing force of the third biasing member 48. As a result, the second space X2 communicates with the first space X1, the liquid contents of the second space X2 are supplied to the supply section X3 of the first space X1, and the internal pressure of the supply section X3 increases.

[0061] In this case, the rearward biasing force applied by the second biasing member 46 to the discharge cylinder member 43, which has moved forward, is smaller than the rearward biasing force applied by the first biasing member 45 to the valve member 44, which has moved forward relative to the discharge cylinder member 43. Therefore, as the internal pressure of the supply unit X3 increases, as shown in Figure 4, the valve member 44 does not move forward relative to the discharge cylinder member 43, and the rear end of the closing cylinder 54 remains in liquid-tight contact with the outer circumferential surface of the opening / closing cylinder 52a, while the communication between the inside of the discharge cylinder member 43 and the supply unit X3 is blocked. The discharge cylinder member 43 and the valve member 44 then move forward together in the first space X1.

[0062] Subsequently, when the internal pressure of the supply unit X3 rises further and reaches a predetermined value, as shown in Figure 5, the valve member 44 moves forward relative to the discharge cylinder member 43, the rear end of the closing cylinder 54 moves forward from the outer surface of the opening / closing cylinder 52a, and the supply unit X3 and the inside of the discharge cylinder member 43 communicate through the inlet hole 52b. As a result, the liquid contents supplied to the supply unit X3 through the stem 13 and the second space X2 are discharged to the outside through the discharge hole 12b inside the discharge cylinder member 43.

[0063] Then, as the internal pressure of the supply unit X3 decreases, as described above, the rearward biasing force applied by the second biasing member 46 to the discharge cylinder member 43 which has moved forward is smaller than the rearward biasing force applied by the first biasing member 45 to the valve member 44 which has moved forward relative to the discharge cylinder member 43. As shown in Figure 4, the valve member 44 returns to its original position towards the rear before the discharge cylinder member 43, blocking communication between the inside of the discharge cylinder member 43 and the supply unit X3, stopping the discharge of the liquid contents. Subsequently, the discharge cylinder member 43 and the valve member 44 move together towards the rear in the first space X1. As a result, the internal volume of the supply unit X3 decreases, and as the internal pressure of the supply unit X3 increases, the discharge cylinder member 43 and the valve member 44 move together towards the front in the first space X1.

[0064] At this time, as the storage plunger 47 returns to its original position forward in the second space X2, and liquid contents continue to be supplied from the second space X2 on the stem 13 side to the supply unit X3, the internal pressure of the supply unit X3 increases further. As described above, as shown in Figure 5, the valve member 44 moves forward relative to the discharge cylinder member 43, creating communication between the discharge cylinder member 43 and the supply unit X3. The liquid contents supplied to the supply unit X3 through the second space X2 are then discharged to the outside through the discharge hole 12b via the discharge cylinder member 43. Subsequently, the discharge of liquid contents is repeated intermittently as described above until the supply of liquid contents from the second space X2 to the supply unit X3 is stopped.

[0065] As described above, in the discharger 1 according to this embodiment, since the first space X1 is provided with a discharge cylinder member 43, a valve member 44, and a first biasing member 45, the liquid contents can be discharged multiple times with a single press of the discharge head 12. Since the discharge cylinder member 43, valve member 44, and first biasing member 45 are made of synthetic resin material, separate disposal is unnecessary, and recyclability can be improved.

[0066] The discharge cylinder member 43 is arranged to be movable in the front-rear direction, and a second biasing member 46 is provided in the first space X1. The rearward biasing force applied by the second biasing member 46 to the discharge cylinder member 43 when it has moved forward is smaller than the rearward biasing force applied by the first biasing member 45 to the valve member 44 when it has moved forward relative to the discharge cylinder member 43. Therefore, communication between the inside of the discharge cylinder member 43 and the supply unit X3 is lost until the discharge cylinder member 43 and the valve member 44 have moved forward together. This makes it possible to lengthen the stopping interval of the discharge of the liquid contents, and thus ensure that the desired cleaning and massage effects are reliably obtained.

[0067] The first biasing member 45, which biases the valve member 44 that has moved forward relative to the discharge cylinder member 43 toward the rear, is a protruding rib extending forward from the valve member 44, and the second biasing member 46, which biases the discharge cylinder member 43 that has moved forward toward the rear, is a protruding rib extending backward from the rear surface of the top wall of the first lid portion 61, and the discharge cylinder member 43 has a first sliding surface 43a on which the front end of the first biasing member 45 slides, and a second sliding surface 43b on which the rear end of the second biasing member 46 slides, so that the first biasing member 45, the second biasing member 46, the first sliding surface 43a, and the second sliding surface 43b can be provided in a simple configuration while keeping bulk down.

[0068] Since the inclination angle of the second sliding surface 43b with respect to the front-rear direction is smaller than the inclination angle of the first sliding surface 43a with respect to the front-rear direction, the rearward biasing force applied by the second biasing member 46 to the discharge cylinder member 43 that has moved forward can be easily made smaller than the rearward biasing force applied by the first biasing member 45 to the valve member 44 that has moved forward relative to the discharge cylinder member 43.

[0069] Since the discharge head 12 is equipped with a second space X2 in which a storage plunger 47 and a third biasing member 48 are provided, as described above, as the discharge and stopping of the liquid contents are repeated, the liquid contents of the second space X2 are pushed forward by the storage plunger 47, and the liquid contents are continuously supplied to the supply section X3 of the first space X1 until the storage plunger 47 reaches its furthest forward position and communication between the second space X2 and the first space X1 is cut off. Thus, the liquid contents can be discharged stably multiple times with a single press operation of the discharge head 12.

[0070] Since the pump mechanism 11 includes a lower piston 15, an upper piston 16, a lower cylinder 14a, an upper cylinder 14b, and a valve 37, it is possible to supply the liquid contents to the discharge head 12 not only when the discharge head 12 is pressed down, but also when the pressure on the discharge head 12 is released. By increasing the amount of liquid contents supplied to the discharge head 12 with a single press operation of the discharge head 12, the number of intermittent discharges of the liquid contents from the discharge head 12 can be increased.

[0071] It should be noted that 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.

[0072] For example, the trigger lever 18 and the support member 17 do not need to be provided.

[0073] 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.

[0074] Examples of the present invention are as follows: <1> A pump mechanism having a stem disposed at the mouth of the container body containing the liquid contents, which is biased upward and movable downward, and the liquid contents being drawn up into the stem as the stem moves downward, The system includes a discharge head provided at the upper end of the stem, which has a first space into which the liquid contents that have passed through the stem are supplied, In the aforementioned first space, A discharge cylinder member that extends in the front-to-back direction and whose front end opening is used as a discharge hole for the liquid contents, A valve member is disposed so as to be movable in the front-rear direction relative to the discharge cylinder member, A first biasing member is provided which biases the valve member, which has moved forward relative to the discharge cylinder member, backward. The portion of the first space located behind the valve member is designated as a supply section to which the liquid contents that have passed through the stem are supplied. The valve member moves in the forward and backward direction in accordance with the increase or decrease in the internal pressure of the supply section. The valve member blocks communication between the discharge cylinder member and the supply unit, and when it moves forward relative to the discharge cylinder member, it allows communication between the discharge cylinder member and the supply unit. A discharger in which the discharge cylinder member, the valve member, and the first biasing member are formed of a synthetic resin material. <2> The discharge cylinder member is arranged to be movable in the front-rear direction, The first space is provided with a second biasing member made of synthetic resin that biases the discharge cylinder member, which has moved forward, to the rear. The rearward biasing force applied by the second biasing member to the discharge cylinder member that has moved forward is smaller than the rearward biasing force applied by the first biasing member to the valve member that has moved forward relative to the discharge cylinder member. <1> The discharger described above. <3> The first biasing member is a protruding rib extending forward from the valve member, The second biasing member is a protruding rib extending rearward from the front wall defining the first space. The discharge cylinder member includes: The first sliding surface on which the front end of the first biasing member slides in accordance with the forward and backward movement of the valve member, A second sliding surface is formed on which the rear end of the second biasing member slides in accordance with the forward and backward movement of the discharge cylinder member. The inclination angle of the second sliding surface with respect to the front-rear direction is smaller than the inclination angle of the first sliding surface with respect to the front-rear direction. <2> The discharger described above. <4> The discharge head is located behind the first space and includes a second space that connects the first space and the stem. In the aforementioned second space, A storage plunger is provided which is movable in the front-rear direction, which blocks communication between the second space and the first space at its foremost position, and which moves backward as liquid contents are supplied to the second space. A third biasing member is provided which biases the storage plunger forward. <1> from <3> A dispensing device as described in one of the following. <5> The aforementioned pump mechanism is A lower piston that is linked to the up-and-down movement of the aforementioned stem, An upper piston is provided above the lower piston and is linked to the vertical movement of the stem, A lower cylinder that houses the lower piston so that it can slide up and down, An upper cylinder extending upward from the lower cylinder, with its interior communicating vertically with the interior of the lower cylinder, having a smaller inner diameter than the lower cylinder, and housing the upper piston so that it can slide vertically; The valve portion provides, when the stem moves downward, the lower chamber located below the lower piston and the upper chamber located above the lower piston within the lower cylinder, and when the stem moves upward, the valve portion provides, <1> from <4> A dispensing device as described in one of the following. [Explanation of Symbols]

[0075] 1 Dispenser 11 Pump mechanism 12 Discharge heads 12b Discharge hole 13 Stem 14a Lower cylinder 14b Upper cylinder 15 Lower piston 16 Upper piston 37 Valve 43 Discharge pipe member 43a First sliding surface 43b 2nd sliding surface 44 Valve member 45 First biasing member 46 Second biasing member 47 Storage Plunger 48 Third biasing member S1 lower chamber S2 upper chamber W Container Body W1 Mouth X1 1st space X2 2nd space X3 supply section

Claims

1. A pump mechanism having a stem disposed at the mouth of the container body containing the liquid contents, which is biased upward and movable downward, and the liquid contents being drawn up into the stem as the stem moves downward, The system includes a discharge head provided at the upper end of the stem, which has a first space into which the liquid contents that have passed through the stem are supplied, In the first space, A discharge cylinder member that extends in the front-to-back direction and whose front end opening is used as a discharge hole for the liquid contents, A valve member is disposed so as to be movable in the front-rear direction relative to the discharge cylinder member, A first biasing member is provided which biases the valve member, which has moved forward relative to the discharge cylinder member, backward. The portion of the first space located behind the valve member is designated as a supply section to which the liquid contents that have passed through the stem are supplied. The valve member moves in the forward and backward direction in accordance with the increase or decrease in the internal pressure of the supply section. The valve member blocks communication between the discharge cylinder member and the supply unit, and when it moves forward relative to the discharge cylinder member, it allows communication between the discharge cylinder member and the supply unit. A discharger in which the discharge cylinder member, the valve member, and the first biasing member are formed of a synthetic resin material.

2. The discharge cylinder member is arranged to be movable in the front-rear direction, The first space is provided with a second biasing member made of synthetic resin that biases the discharge cylinder member, which has moved forward, to the rear. The discharger according to claim 1, wherein the rearward biasing force applied by the second biasing member to the discharge cylinder member that has moved forward is smaller than the rearward biasing force applied by the first biasing member to the valve member that has moved forward relative to the discharge cylinder member.

3. The first biasing member is a protruding rib extending forward from the valve member, The second biasing member is a protruding rib extending rearward from the front wall that defines the first space. The discharge cylinder member includes: The first sliding surface on which the front end of the first biasing member slides in accordance with the forward and backward movement of the valve member, A second sliding surface is formed on which the rear end of the second biasing member slides in accordance with the forward and backward movement of the discharge cylinder member, The discharger according to claim 2, wherein the inclination angle of the second sliding surface with respect to the front-rear direction is smaller than the inclination angle of the first sliding surface with respect to the front-rear direction.

4. The discharge head is located behind the first space and includes a second space that connects the first space and the stem. In the aforementioned second space, A storage plunger is provided which is movable in the front-rear direction, which blocks communication between the second space and the first space at its foremost position, and which moves backward as liquid contents are supplied to the second space. The discharger according to claim 1 or 2, further comprising a third biasing member that biases the storage plunger forward.

5. The aforementioned pump mechanism is A lower piston that is linked to the up-and-down movement of the aforementioned stem, An upper piston is provided above the lower piston and is linked to the vertical movement of the stem, A lower cylinder that houses the lower piston so that it can slide up and down, An upper cylinder extending upward from the lower cylinder, with its interior communicating vertically with the interior of the lower cylinder, having a smaller inner diameter than the lower cylinder, and housing the upper piston so that it can slide vertically; The discharger according to claim 1 or 2, further comprising: a valve that, when the stem moves downward, allows communication between a lower chamber located below the lower piston and an upper chamber located above the lower piston within the lower cylinder, and that blocks communication between the lower chamber and the upper chamber when the stem moves upward.

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