Discharge device

Abstract

To increase the number of times of discharges of a content from a discharge device by operating a trigger lever one time.SOLUTION: A discharge device includes a trigger lever linked to a discharge head, and the discharge head includes: a piston guide having a plug part for closing a first communication hole at a forefront position and undercut parts which intermittently contact with an inner wall surface of the first communication hole in a circumferential direction and are detachably fitted in the inner wall surface in a front-back direction; a piston which engages with the piston guide so as to be relatively movable in a predetermined range in the front-back direction and moves backward with the piston guide as a content is supplied to a front storage part; a first biasing member which biases the piston forward; a storage plunger which closes a second communication hole at a forefront position and moves backward as the content is supplied to a rear storage part; and a second biasing member which biases the storage plunger forward.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a dispenser. [Background technology]

[0002] A dispenser described in Patent Document 1 below has been known. This dispenser includes a stem that is biased upward and arranged to be freely movable downward, a dispenser head that is attached to the upper end of the stem and has a dispense hole for dispensing the contents, a trigger lever for pressing down the dispenser head, a cylindrical piston that moves in conjunction with the stem, and a cylinder that houses the piston so that it can slide up and down. When the trigger lever is pulled, the piston moves downward together with the stem, and the contents in the cylinder, which have been pressurized by the piston, are dispensed through the stem and from the dispense hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-13824 Summary of the Invention [Problem to be solved by the invention]

[0004] Dispensers that dispense contents such as dry shampoo onto the scalp or skin are characterized by the force of the contents being dispensed to achieve a cleansing effect that removes dirt and a massage effect. For this reason, dispensing the contents with a single operation of the trigger lever requires repeated operation of the trigger lever, which makes the operation difficult and increases the intervals between dispenses, thereby reducing the cleansing and massage effects.

[0005] The present invention has been made in view of the above circumstances, and its object is to increase the number of times that the contents are discharged from the dispenser with a single operation of the trigger lever. [Means for solving the problem]

[0006] The dispenser according to the present invention includes a stem disposed at the mouth of a container body for containing contents so as to be movable downward in an upwardly biased state, a discharge head provided at the upper end of the stem and having a discharge hole formed therein, and a trigger lever linked to the discharge head. The discharge head includes a front storage portion having a first communication hole formed therein that communicates with the discharge hole in the front, and a rear storage portion disposed behind the front storage portion, having a second communication hole formed therein that communicates with the front storage portion in the front, and storing the contents that have passed through the stem. The front storage portion includes a plug portion movably disposed within the front storage portion and closing the first communication hole at the most forward position, and a piston guide having an undercut portion that intermittently contacts the inner wall surface of the first communication hole in the circumferential direction and is detachably fitted in the front-rear direction. The piston is engaged with the piston guide so as to be relatively movable within a predetermined range in the front-rear direction, and moves rearward together with the piston guide as the contents are supplied to the front storage portion. The front storage portion further includes a first biasing member that biases the piston forward. The rear storage portion includes a storage plunger movably disposed within the rear storage portion and closing the second communication hole at the most forward position, and moving rearward as the contents are supplied to the rear storage portion. The rear storage portion further includes a second biasing member that biases the storage plunger forward. The piston is capable of elastic deformation that allows communication between the space in front of the piston and the space behind the piston in the front storage portion, and restoration deformation that blocks communication between the space in front of the piston and the space behind the piston in the front storage portion, in response to the pressure of the contents. When the pressure of the contents when the piston undergoes the elastic deformation is designated as P1, the pressure of the contents when the piston moves rearward against the biasing force of the first biasing member is designated as P2, and the pressure of the contents when the storage plunger moves rearward against the biasing force of the second biasing member is designated as P3, the relationship P1 < P2 < P3 holds.

[0007] In the dispenser according to the present invention, when the trigger lever is operated and the stem moves downward against the biasing force, the contents are supplied from the stem to the rear reservoir. When the contents are supplied to the rear reservoir, the pressure of the contents increases in the rear reservoir (pressure P3), and the reservoir plunger moves rearward against the biasing force of the second biasing member. When the reservoir plunger moves rearward, the second communication hole formed in front of the rear reservoir is opened, and the contents in the rear reservoir are supplied to the front reservoir via the second communication hole. When contents are supplied to the front storage section, the pressure of the contents increases in the front storage section (pressure P1), causing the piston to elastically deform, and the contents are supplied from the space behind the piston to the space ahead in the front storage section. When the pressure of the contents in the front storage section increases further (pressure P2) due to the supply of contents from the rear storage section to the front storage section, the piston moves rearward against the bias of the first biasing member. As the piston moves rearward, the piston guide, which is undercut-fitted into the inner wall surface of the first communication hole, is pulled by the piston and detaches from the inner wall surface of the first communication hole, moving rearward. The piston guide has a plug portion that closes the first communication hole formed in front of the front storage section, and opens the first communication hole when it moves rearward. When the first communication hole is opened, the space in front of the piston in the front storage portion communicates with the discharge hole, and the pressure in the space in front of the piston in the front storage portion decreases. When the pressure in the space in front of the piston in the front storage portion decreases, the piston moves forward due to the bias of the first biasing member. When the piston moves forward, the volume of the space behind the piston in the front storage portion increases, and the pressure in the rear space decreases, so the piston undergoes restoration deformation. When the piston undergoes restoration deformation, communication between the space in front of the piston and the space behind it in the front storage portion is blocked, and the forward movement of the piston pressurizes the space in front of the piston in the front storage portion. When the space in front of the piston in the front reservoir is pressurized, the contents in the front reservoir are supplied to the discharge hole through the first communication hole, and the contents are discharged to the outside. Here, the piston guide has undercut portions that intermittently abut against the inner wall surface of the first communication hole in the circumferential direction, so the contents can pass through gaps in the undercut portions and flow from the front reservoir to the discharge hole. Furthermore, because the piston guide in the non-engaged state abuts against the inner wall surface of the first communication hole or its vicinity through the undercut portions, when the piston begins to move forward, it does not move forward with the piston, keeping the first communication hole open. When the piston moves further forward and exceeds the stroke at which it can move relative to the piston guide, the piston guide moves forward together with the piston and fits against the inner wall surface of the first communication hole, causing the plug portion to close the first communication hole. When the first communication hole is closed, the pressure of the contents increases again in the front storage portion (pressure P1) due to the supply of contents from the rear storage portion to the front storage portion, causing the piston to elastically deform, and the contents are supplied from the space behind the piston to the space in front of it in the front storage portion. Thereafter, the above-described cycle is repeated, and the pressure of the contents in the rear reservoir decreases, and the contents are intermittently discharged from the discharge hole until the reservoir plunger closes the second communication hole. Thus, according to the dispenser of the present invention, the number of times the contents are dispensed from the dispenser with one operation of the trigger lever can be increased, thereby improving the cleansing effect and the massaging effect.

[0008] (2) The piston may include a first pressure receiving portion facing forward and a second pressure receiving portion facing rearward and having a smaller pressure receiving area than the first pressure receiving portion.

[0009] In this case, the piston can be moved rearward due to the difference between the area receiving the pressure applied to the front side of the piston and the area receiving the pressure applied to the rear side of the piston.

[0010] (3) The valve may include a lower piston provided at the bottom of the stem, an upper piston provided on the stem above the lower piston, a lower cylinder that houses the lower piston so that it can slide up and down, an upper cylinder that is connected to the top of the lower cylinder, the interior of which is in vertical communication with the interior of the lower cylinder and has an inner diameter smaller than that of the lower cylinder, and that houses the upper piston so that it can slide up and down, and a valve that allows communication between the space below the lower piston and the space above within the lower cylinder when the stem moves downward, and blocks communication between the space below the lower piston and the space above within the lower cylinder when the stem moves upward.

[0011] In this case, when the trigger lever is operated and the stem moves downward against the bias, the contents stored inside 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 space below the lower piston in the lower cylinder and the space above. As a result, the contents are discharged from inside the upper cylinder, while the contents are filled from the space below the lower piston into the lower cylinder, which is connected vertically to the interior of the upper cylinder. When the trigger lever is released and the stem moves upward due to the force, the valve section blocks communication between the space below the lower piston in the lower cylinder and the space above. The contents stored in the lower cylinder are then pressurized by the lower piston, which moves upward with the stem. While the volume of the upper cylinder increases due to the upper piston moving upward with the stem, the decrease in the volume of the lower cylinder is greater than the increase in the volume of the upper cylinder because the inner diameter of the upper cylinder is smaller than that of the lower cylinder. As a result, the difference between the volume (internal volume) of the lower cylinder and the volume (internal volume) of the upper cylinder allows the contents to be supplied to the discharge head. In other words, the interiors of the lower and upper cylinders are pressurized as a whole. When the trigger lever connected to the stem returns to its original position, the contents in the upper cylinder are still pressurized, and the contents are discharged to the outside through the discharge hole via the stem. In this way, the contents are not only discharged when the trigger lever is operated, but also supplied to the discharge head when the trigger lever returns to its original position, which increases the amount of contents supplied to the discharge head with one operation of the trigger lever and increases the number of intermittent discharges of the contents from the discharge head. [Effects of the Invention]

[0012] According to the dispenser of the present invention, the number of times the content is dispensed from the dispenser with one operation of the trigger lever can be increased. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a longitudinal sectional view of a dispenser according to an embodiment of the present invention. [Figure 2] 1A is an enlarged view of a main part (valve part) of a lower piston moving upward, and FIG. 1B is an enlarged view of a main part (valve part) of a lower piston moving downward, according to an embodiment of the present invention. [Figure 3] 5A to 5C are longitudinal cross-sectional views illustrating the operation of the intermittent discharge mechanism according to the embodiment of the present invention. [Figure 4]5A to 5C are longitudinal cross-sectional views illustrating the operation of the intermittent discharge mechanism according to the embodiment of the present invention. [Figure 5] 5A to 5C are longitudinal cross-sectional views illustrating the operation of the intermittent discharge mechanism according to the embodiment of the present invention. [Figure 6] 5A to 5C are longitudinal cross-sectional views illustrating the operation of the intermittent discharge mechanism according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A dispenser according to an embodiment of the present invention will now be described with reference to the drawings.

[0015] 1 includes a pump section 3 that dispenses content from a cylindrical container body 2 with a bottom, an attachment cap 4 that attaches the pump section 3 to the opening 2a of the container body 2, a trigger lever 6 that connects to the pump section 3, and a support member 5 that supports the trigger lever 6. The pump section 3 includes a stem 10, a discharge head 20, a cylinder 30, a lower piston 40A, and an upper piston 40B.

[0016] The mounting cap 4, stem 10, cylinder 30, lower piston 40A, and upper piston 40B are arranged with their respective central axes positioned on a common axis. Hereinafter, this common axis will be referred to as the container axis O1, and the direction along the container axis O1 will be referred to as the vertical direction. Furthermore, in a plan view seen from the vertical direction, the direction intersecting the container axis O1 will be referred to as the radial direction, and the direction circumferential around the container axis O1 will be referred to as the circumferential direction.

[0017] The discharge head 20 extends along a central axis O2 that intersects with the container axis O1. Hereinafter, the direction in which the discharge head 20 extends in a plan view will be referred to as the front-rear direction, the side of the discharge holes 3a of the discharge head 20 along the front-rear direction will be referred to as the front, and the side of the discharge head 20 opposite the discharge holes 3a will be referred to as the rear. The direction perpendicular to both the up-down direction and the front-rear direction will be referred to as the left-right direction.

[0018] The attachment cap 4 is formed in a cylindrical shape with a top and an opening in the center. The inner peripheral surface of the attachment cap 4 is formed with a female thread that screws into a male thread formed on the outer peripheral surface of the mouth portion 2a of the container body 2.

[0019] The support member 5 is attached to the upper end of the cylinder 30 inserted into the opening of the attachment cap 4. The support member 5 includes a topped cylindrical surrounding cylinder portion 51 fitted onto the upper end of the cylinder 30, a guide cylinder 52 extending upward from the top wall of the surrounding cylinder portion 51, a pair of side wall portions 56 projecting rearward from the surrounding cylinder portion 51 and arranged with a gap in between in the left-right direction, and a rear wall portion 57 connecting the rear end edges of the side wall portions 56 to each other in the left-right direction.

[0020] The top wall of surrounding tube portion 51 is formed in a circular ring shape with an opening in the center, and guide tube 52 is connected to the inner peripheral edge of this top wall. Stem 10 is inserted into guide tube 52 so as to be movable in the vertical direction. On the underside of the top wall of surrounding tube portion 51, there are formed inner hanging tube portion 54, into which stem 10 is inserted, and outer hanging tube portion 55, which is disposed between inner hanging tube portion 54 and the peripheral wall of surrounding tube portion 51.

[0021] An opposing portion 51a is formed on the peripheral surface of the lower end portion of the peripheral wall of surrounding tube portion 51, and faces the top wall portion of attachment cap 4 in the vertical direction via a gap. Outer hanging tube portion 55 is fitted inside the upper end portion of cylinder 30. Inner hanging tube portion 54 is connected to guide tube 52.

[0022] The pair of side walls 56 extend gradually upward from the front to the rear. A shaft 58 protrudes outward in the left-right direction from the upper ends of the pair of side walls 56. The shaft 58 is disposed rearward of the stem 10. The shaft 58 serves as the pivot axis of the trigger lever 6. A reinforcing wall 59 protrudes upward from the inner surface of the rear wall 57 and connects the inner surfaces of the pair of side walls 56 together in the left-right direction.

[0023] The trigger lever 6 is attached to the support member 5 via a shaft 58. This connects the trigger lever 6 to the support member 5 so that it can swing about an axis extending in the left-right direction. The trigger lever 6 has a top plate 61 that covers the discharge head 20 from above, a front plate 62 that extends gradually downward as it moves forward from the front edge of the top plate 61, and a pair of side plate portions 63 that extend downward from the left and right side edges of the top plate 61 and face each other in the left-right direction.

[0024] The discharge head 20 is disposed in an internal space surrounded by the top plate 61 and a pair of side plate portions 63. The pair of side plate portions 63 are disposed so as to sandwich the discharge head 20 from the left and right. The top plate portion 61 has a smoothly curved shape that bulges upward, and its rear end portion abuts from above against the upper end portion of the rear wall portion 57 of the support member 5. This restricts the trigger lever 6 from swinging further upward around the shaft body 58.

[0025] An opening 64 is formed in the front portion of the top plate 61, penetrating the top plate 61. The opening 64 is formed in the center portion of the top plate 61 in the left-right direction and opens forward. This gives the front portion of the top plate 61 a bifurcated shape in the left-right direction. The front plate 62 extends gradually downward as it moves forward from the front end edge of the bifurcated top plate 61.

[0026] The discharge head 20 is inserted into the opening 64. The discharge head 20 protrudes forward from the front plate 62 through the opening 64. The pair of side plate portions 63 of the trigger lever 6 laterally sandwich the upper portions of the pair of side wall portions 56 of the support member 5. The lower portion of the front plate portion 62 serves as a finger hook portion for resting the fingertips.

[0027] The trigger lever 6 has a plate portion that projects inward in the left-right direction from the pair of side plate portions 63, and at the lower end thereof, an engagement groove that engages with the shaft portion 20a of the discharge head 20. In the above configuration, when the trigger lever 6 is swung downward around the shaft body 58, the trigger lever 6 pushes the shaft portion 20a of the discharge head 20 downward, and the stem 10 moves downward.

[0028] The stem 10 is formed in a cylindrical shape extending in the vertical direction, and is provided inside the guide tube 52 so as to be movable downward while being biased upward. A cylindrical guide member 11 is fitted onto the stem 10 from below. The guide member 11 extends downward beyond the lower end of the stem 10. The guide member 11 is one of the components of the stem 10. Note that if the ejection head 20 is a separate part from the stem 10 and is attached to the upper end of the stem 10, the stem 10 and the guide member 11 may be formed integrally.

[0029] A communication hole 12 is formed on the outer peripheral surface of a guide member 11 that extends downward from the stem 10. The communication hole 12 communicates the inside of the stem 10 with the inside of the cylinder 30 through the inside of the guide member 11. A ring-shaped mounting groove 13 is formed on the peripheral surface of the lower end of the guide member 11, into which the lower piston 40A is attached.

[0030] The guide member 11 has a rod portion 14 that extends downward beyond the lower piston 40A. When the stem 10 is at its lowest position, the lower end of the rod portion 14 is located directly above the valve body 33 (described later). This prevents the valve body 33 from moving upwardly away from the restricting protrusion 31e.

[0031] A discharge head 20 having a discharge hole 3a formed therein is provided at the upper end of the stem 10. A shaft portion 20a protruding in the left-right direction is formed on the outside of the discharge head 20. An intermittent discharge mechanism 100 (described later) that intermittently discharges the contents is provided inside the discharge head 20.

[0032] The stopper 70 is provided to be swingable around the rotation shaft 71 and restricts the downward movement of the discharge head 20. The stopper 70 is arranged to be movable between a restricting position where it restricts the downward movement of the discharge head 20 and a non-restricting position where it swings rearward around the rotation shaft 71 from the restricting position and allows the downward movement of the discharge head 20. Both left and right ends of the rotation shaft 71 are journaled by the surrounding cylinder portion 51.

[0033] The stopper 70 has a main operation surface 72, a pair of operation side surfaces 73 connected to the main operation surface 72, and a restricting plate portion 74 provided on the pair of operation side surfaces 73 so as to be interposable between the discharge head 20 and the guide tube 52. The pair of operation side surfaces 73 have a fan-shaped outline when viewed from the left and right, and the rotation shaft 71 is disposed at the central corner of the fan-shaped outline. The restricting plate portion 74 is formed in a semi-cylindrical shape with an open front side.

[0034] When the stopper 70 is brought close to the stem 10 to be in a locked state, the restricting plate portion 74 restricts the downward pushing of the discharge head 20. When the stopper 70 is moved away from the stem 10 to be in an unlocked state, the restriction on the downward pushing by the restricting plate portion 74 is released. With this configuration, the main operating surface 72 of the stopper 70 can be provided at a position outside (rear of) the support member 5, and the stopper 70 can be made large, resulting in a stopper 70 that is easy to operate.

[0035] The lower piston 40A is attached to the attachment groove 13 of the guide member 11 of the stem 10. The lower piston 40A includes a base 41A, a sliding portion 42A, a cylindrical seal portion 43A, and a spring receiving portion 44A. The base 41A is formed in a disk shape in a plan view and extends radially outward from the guide member 11.

[0036] The sliding portion 42A extends upward in a cylindrical shape from the outer periphery of the base portion 41A. The sliding portion 42A is formed in an inverted cone shape that increases in diameter and gradually decreases in thickness as it extends upward. The upper end of the sliding portion 42A is easily elastically deformed in the radial direction and abuts against the inner wall surface of the lower cylinder 30A (described below) so as to be slidable in the vertical direction. The sliding portion 42A forms a valve portion 80 (described below).

[0037] The cylindrical seal portion 43A extends upward in a cylindrical shape from the center of the upper surface of the base portion 41A. The inner peripheral surface of the cylindrical seal portion 43A is in close contact with the outer peripheral surface of the guide member 11. The spring receiving portion 44A is provided perpendicularly from the lower surface of the base portion 41A. A step is formed on the outer peripheral surface of the spring receiving portion 44A to receive the upper end of the coil spring 34.

[0038] The upper piston 40B is provided above the lower piston 40A on the stem 10. The upper piston 40B includes a connecting cylindrical portion 41B and a cylindrical sliding portion 42B. The connecting cylindrical portion 41B is formed in an annular shape extending radially outward from the outer circumferential surface of the guide member 11.

[0039] The cylindrical sliding portion 42B is connected to the radially outer end of the connecting cylindrical portion 41B and extends vertically from that portion. The upper end of the cylindrical sliding portion 42B faces the lower end of the inner hanging cylindrical portion 54 in the vertical direction, with the seal member 50 sandwiched therebetween. The lower end of the cylindrical sliding portion 42B abuts against the inner wall surface of the upper cylinder 30B (described below) so as to be slidable vertically. The connecting cylindrical portion 41B is located above the communicating hole 12 on the outer peripheral surface of the guide member 11.

[0040] The cylinder 30 includes an outer cylindrical member 31 and an inner cylindrical member 32 assembled inside the outer cylindrical member 31. The outer cylindrical member 31 is formed in a multi-stage cylindrical shape. The outer cylindrical member 31 includes an upper cylindrical portion 31a extending in the vertical direction, a lower cylindrical portion 31b extending downward from the lower end of the upper cylindrical portion 31a and having smaller inner and outer diameters than the upper cylindrical portion 31a, and a connecting cylindrical portion 31c extending downward from the lower end of the lower cylindrical portion 31b and having smaller inner and outer diameters than the lower cylindrical portion 31b.

[0041] An inner cylindrical member 32 is fitted inside the upper cylindrical portion 31a. The lower end of the inner cylindrical member 32 abuts against the upper surface of the step between the upper cylindrical portion 31a and the lower cylindrical portion 31b. A first air hole 31g that connects the inside and outside of the upper cylindrical portion 31a is formed in the upper part of the upper cylindrical portion 31a. An annular support plate portion 31f that protrudes radially outward is formed in the upper end of the upper cylindrical portion 31a. The lower surface of the top wall portion of the attachment cap 4 abuts against the outer periphery of the upper surface of the support plate portion 31f.

[0042] A packing material 35 is disposed between the support plate portion 31f and the upper opening edge of the mouth portion 2a of the container body 2. The mouth portion attachment portion 11b of the attachment cap 4 is screwed onto the mouth portion 2a, whereby the support plate portion 31f and the packing material 35 are fixed between the top wall of the attachment cap 4 and the mouth portion 2a.

[0043] A coil spring 34 is disposed inside the lower cylindrical portion 31b. The upper end of the coil spring 34 extends from the lower cylindrical portion 31b into the upper cylindrical portion 31a and abuts against a spring bearing portion 44A of the lower piston 40A. As a result, the stem 10 receives an upward biasing force from the coil spring 34 via the lower piston 40A and the guide member 11.

[0044] A tapered valve seat 31d is formed at the lower end of the lower cylindrical portion 31b, with the inner diameter gradually decreasing as it extends downward. A valve element 33 is seated on the valve seat 31d so as to be removably positioned upward. The valve element 33 is a so-called ball valve formed in a spherical shape. Note that the valve element 33 may also be a check valve using various valve elements instead of a ball valve.

[0045] A restricting protrusion 31e is provided on the inner peripheral surface of the lower cylindrical portion 31b, extending gradually upward from the outer radial direction toward the inner radial direction. The inner diameter of the upper end of the restricting protrusion 31e is smaller than the outer diameter of the valve body 33, thereby restricting the valve body 33 from detaching upward from the restricting protrusion 31e. A gap is formed in the restricting protrusion 31e to interrupt its circumferential extension.

[0046] The connecting tube portion 31c communicates with the lower end of the lower tube portion 31b via the valve body 33. A pipe attachment 113 is attached to the connecting tube portion 31c. The pipe attachment 113 includes a pipe member 114 that extends to the vicinity of the bottom of the container body 2, and connects the lower end opening of the outer tube member 31 with the upper end opening of the pipe member 114. Note that a forward / inverted dual-purpose adapter (not shown) may be connected to the connecting tube portion 31c, which supplies the contents into the cylinder 30 when negative pressure is created inside the cylinder 30 when the dispenser 1 is in both the upright and inverted positions.

[0047] The inner cylinder member 32 includes a lower cylinder forming portion 32a, an upper cylinder forming portion 32b, a restricting portion 32c, a flange portion 32d, and an upright cylinder portion 32e. The lower cylinder forming portion 32a forms the lower end portion of the inner cylinder member 32. The lower cylinder forming portion 32a is formed in a cylindrical shape that extends in the vertical direction and is fitted inside the upper cylinder portion 31a of the outer cylinder member 31. Note that the first air hole 31g of the upper cylinder portion 31a is located above the fitting position of the lower cylinder forming portion 32a.

[0048] The lower cylinder-forming portion 32a forms the lower cylinder 30A that houses the lower piston 40A. An annular groove 32g that is recessed radially outward is formed in the lower part of the inner wall surface of the lower cylinder-forming portion 32a. When the stem 10 is positioned at the lowest position, the upper end of the sliding portion 42A of the lower piston 40A is positioned in the annular groove 32g.

[0049] The upper cylinder forming portion 32b extends upward from the upper end of the lower cylinder forming portion 32a. The upper cylinder forming portion 32b has smaller inner and outer diameters than the lower cylinder forming portion 32a. The upper cylinder forming portion 32b forms the upper cylinder 30B that houses the upper piston 40B.

[0050] A second air hole 32f is formed in the upper part of the upper cylinder-forming portion 32b, connecting the inside and outside of the upper cylinder-forming portion 32b. The second air hole 32f communicates with the first air hole 31g through a gap (annular space) between the upper cylinder-forming portion 32b and the upper cylindrical portion 31a on the outside of the upper cylinder-forming portion 32b. When the stem 10 is positioned at the uppermost position, the second air hole 32f is not blocked by the cylindrical sliding portion 42B of the upper piston 40B and is open.

[0051] The restricting portion 32c is formed in a cylindrical shape and is connected to the step between the lower cylinder forming portion 32a and the upper cylinder forming portion 32b. When the stem 10 is at the uppermost position, the lower end surface of the restricting portion 32c abuts against the upper end of the sliding portion 42A to restrict the upward movement of the lower piston 40A, which is biased upward by the coil spring 34. When the stem 10 is at the lowermost position, the upper end surface of the restricting portion 32c abuts against the lower end of the cylindrical sliding portion 42B to restrict the downward movement of the upper piston 40B.

[0052] The flange portion 32d protrudes radially outward from the upper end of the upper cylinder forming portion 32b and is disposed on the upper end opening edge of the upper tubular portion 31a. The flange portion 32d is fixed to the upper end opening edge of the upper tubular portion 31a by the surrounding tubular portion 51 of the support member 5. An upright tubular portion 32e extending upward is formed on the upper surface of the flange portion 32d. The upright tubular portion 32e forms the upper end of the cylinder 30. In other words, the surrounding tubular portion 51 is fitted on the outside of the upright tubular portion 32e, and the outer hanging tubular portion 55 is fitted inside the upright tubular portion 32e.

[0053] The inner tube member 32 is formed by an upper tube member 111 and a lower tube member 112. The upper tube member 111 forms the upper part of the inner tube member 32. The upper tube member 111 forms the above-mentioned upper cylinder forming portion 32b, flange portion 32d, and upright tube portion 32e. The lower tube member 112 forms the lower part of the inner tube member 32. The lower tube member 112 forms the above-mentioned lower cylinder forming portion 32a and restricting portion 32c. A fitting groove portion 112a into which the lower end portion of the upper tube member 111 fits is formed at the upper end of the lower tube member 112.

[0054] The discharger 1 having the above-described configuration is formed with a lower cylinder 30A that houses the lower piston 40A so that it can slide up and down, and an upper cylinder 30B that is connected to the upper end of the lower cylinder 30A, has an interior that is vertically connected to the interior of the lower cylinder 30A, has an inner diameter smaller than that of the lower cylinder 30A, and houses the upper piston 40B so that it can slide up and down.

[0055] A valve portion 80 is provided at a sliding portion 42A of the lower piston 40A with the lower cylinder 30A. When the stem 10 moves downward, the valve portion 80 elastically deforms radially inward, allowing communication between a space S1 below the lower piston 40A and a space S2 above inside the lower cylinder 30A. When the stem 10 moves upward, the valve portion 80 restores its original shape radially outward, blocking communication between the space S1 below the lower piston 40A and the space S2 above inside the lower cylinder 30A.

[0056] To operate the dispenser 1 having the above configuration, first, the stopper 70 is swung from the restricting position to the releasing position to allow the trigger lever 6 and stem 10 to move downward. Next, the trigger lever 6 is rotated downward around the shaft 58.

[0057] At this time, the trigger lever 6 is rotated downward while the fingertip is placed on the finger rest on the front plate 62 of the trigger lever 6. When the trigger lever 6 is rotated downward, the stem 10 moves downward against the biasing force. When the stem 10 moves downward, the inside of the cylinder 30 is pressurized with the valve body 33 seated on the valve seat 31d.

[0058] Specifically, when the trigger lever 6 is operated and the stem 10 moves downward against the force, the contents filled inside the upper cylinder 30B are pressurized by the upper piston 40B, and rise inside the stem 10 through the communicating hole 12 of the guide member 11 and are supplied into the discharge head 20.

[0059] When the stem 10 moves downward, the valve portion 80 elastically deforms radially inward, as shown in Fig. 2(b), allowing communication between the space S1 below the lower piston 40A and the space S2 above inside the lower cylinder 30A. As a result, the contents are discharged from inside the upper cylinder 30B, and the inside of the lower cylinder 30A, which is in vertical communication with the inside of the upper cylinder 30B, is filled with the contents from the space S1 below the lower piston 40A.

[0060] When the trigger lever 6 is released and the stem 10 is forced to move upward, the valve portion 80 deforms and restores its original shape, as shown in Figure 2(a), blocking communication between the space S1 below the lower piston 40A and the space S2 above it inside the lower cylinder 30A. As a result, the contents stored inside the lower cylinder 30A are pressurized by the lower piston 40A, which moves upward together with the stem 10.

[0061] 1, the volume inside the upper cylinder 30B increases due to the upper piston 40B moving upward together with the stem 10. However, because the inner diameter of the upper cylinder 30B is smaller than the inner diameter of the lower cylinder 30A, the decrease in the volume of the lower cylinder 30A is greater than the increase in the volume of the upper cylinder 30B. As a result, the difference between the volume (internal volume) of the lower cylinder 30A and the volume (internal volume) of the upper cylinder 30B allows the content to be supplied to the discharge head 20 through the stem 10. In other words, the insides of the lower cylinder 30A and the upper cylinder 30B are pressurized as a whole.

[0062] In this way, even when the trigger lever 6 connected to the stem 10 returns from its fully pulled state to its original position shown in Figure 1, the contents inside the upper cylinder 30B are pressurized and the contents are supplied to the discharge head 20 through the stem 10.

[0063] When the stem 10 is forced to move upward, negative pressure is created in the space S1 below the lower piston 40A, the valve body 33 moves upward away from the valve seat 31d, and the contents in the container body 2 are sucked up into the cylinder 30. During this time, the first air hole 31g, the second air hole 32f, and the gap between the stem 10 and the guide tube 52 are connected, allowing outside air to be drawn into the container body 2 and releasing the negative pressure inside the container body 2.

[0064] As described above, the dispenser 1 according to this embodiment not only dispenses the contents when the trigger lever 6 is operated, but also supplies the contents to the discharge head 20 when the trigger lever 6 returns to its original position. This makes it possible to increase the amount of contents supplied to the discharge head 20 with a single operation of the trigger lever 6.

[0065] 3 to 6, the configuration of the discharge head 20 will be described. In the following description, the direction intersecting the central axis O2 of the discharge head 20 that passes through the center of the discharge hole 3a is referred to as the radial direction, and the direction going around the central axis O2 is referred to as the circumferential direction.

[0066] As shown in Fig. 3, the ejection head 20 includes a nozzle portion 21, an intermediary portion 22, an injection tube portion 23, and a lid portion 24. The nozzle portion 21, the intermediary portion 22, the injection tube portion 23, and the lid portion 24 are combined along a central axis O2. The injection tube portion 23 is connected to the upper end of the stem 10 so as to extend in the front-to-rear direction. The injection tube portion 23 is formed in a topped cylindrical shape with an open rear end and a closed front end. The interior of the injection tube portion 23 is in communication with the interior of the stem 10.

[0067] At the closed front end of injection tube portion 23, a plurality of through holes 23a are formed that penetrate the peripheral wall of injection tube portion 23 in the radial direction. In addition, at the closed front end of injection tube portion 23, a guide tube portion 23b that protrudes forward is formed. Lid portion 24 closes the rear end opening of injection tube portion 23. Intermediate portion 22 is formed in a cylindrical shape that extends in the front-to-rear direction, and is fitted onto injection tube portion 23 from the front. The interior of intermediate portion 22 is in communication with the interior of injection tube portion 23 via through holes 23a.

[0068] The front end of relay section 22 is provided with nozzle mounting section 22a, which has a smaller diameter than the portion that fits onto injection tube section 23. Nozzle section 21 is fitted inside nozzle mounting section 22a. Nozzle section 21 is fixed by fixing member 21a arranged inside nozzle mounting section 22a so that its tip protrudes forward from nozzle mounting section 22a. Nozzle section 21 is formed in a topped cylindrical shape with an open rear end and a closed front end, and a discharge hole 3a is formed in the closed wall of the front end. The interior of nozzle section 21 is in communication with the interior of relay section 22.

[0069] The discharge head 20 having the above-described configuration is provided with an intermittent discharge mechanism 100. Specifically, the discharge head 20 includes a front storage section 110 having a first communication hole 110a formed in the front thereof that communicates with the discharge hole 3a, and a rear storage section 120 that is disposed behind the front storage section 110 and has a second communication hole 120a formed in the front thereof that communicates with the front storage section 110, and in which the content that has passed through the stem 10 is stored.

[0070] The front reservoir 110 is formed inside the relay section 22. The first communication hole 110a connects the front reservoir 110 with the inside of the nozzle mounting section 22a. A fitted portion 110b into which a piston guide 130 (described later) is undercut fitted is formed on the inner wall surface of the first communication hole 110a. The fitted portion 110b may be a convex portion that protrudes radially inward, or a concave portion that is recessed radially outward.

[0071] The front reservoir 110 includes a piston guide 130, a piston 140, and a first biasing member 150. The piston guide 130 is formed in a rod shape extending in the front-rear direction, and is disposed so as to be freely movable within the front reservoir 110. The piston guide 130 includes a stopper portion 131 that closes the first communication hole 110a at the frontmost position. The stopper portion 131 has a conical shape whose diameter decreases as it extends forward, and abuts against the first communication hole 110a from behind.

[0072] An undercut portion 132 that fits into the inner wall surface of the first communication hole 110a is provided in front of the plug portion 131 on the piston guide 130. The undercut portion 132 abuts intermittently in the circumferential direction against the inner wall surface of the first communication hole 110a. Specifically, the undercut portions 132 have multiple rib shapes that protrude radially from the circumferential surface of the tip end of the piston guide 130, and multiple undercut portions 132 (for example, four at 90° intervals) are provided at intervals in the circumferential direction.

[0073] The undercut portion 132 is detachably fitted to the inner wall surface of the first communicating hole 110a in the front-rear direction. That is, the undercut portion 132 is capable of climbing over a fitted portion 110b formed on the inner wall surface of the first communicating hole 110a in the front-rear direction. When the undercut portion 132 is fitted over the fitted portion 110b, the first communicating hole 110a is closed by the stopper portion 131. When the undercut portion 132 climbs over the fitted portion 110b rearward, the stopper portion 131 separates from the first communicating hole 110a, and the first communicating hole 110a is opened.

[0074] Piston 140 has an umbrella shape with a diameter that widens toward the front. Piston 140 is disposed within front storage portion 110 so as to be movable in the front-rear direction, and is engaged with piston guide 130 so as to be relatively movable within a predetermined range in the front-rear direction. Piston 140 includes an engaging portion 141 that engages with piston guide 130, a first pressure-receiving portion 142 that extends forward from engaging portion 141, and a second pressure-receiving portion 143 that extends rearward from engaging portion 141.

[0075] A guide groove 133 is formed on the circumferential surface of the rear end of the piston guide 130. The guide groove 133 is formed to a constant depth in the radial direction and extends in the front-rear direction. The engagement portion 141 is formed in a ring shape and is engaged with the guide groove 133 so as to be slidable in the front-rear direction along the guide groove 133. The length of the guide groove 133 in the front-rear direction (the movement stroke of the engagement portion 141) is smaller than the movement stroke of the piston 140 in the front reservoir portion 110.

[0076] The first pressure receiving portion 142 is formed from the radial outer end edge of the engaging portion 141 toward the front. The first pressure receiving portion 142 has a diameter that increases as it extends forward. The front end of the first pressure receiving portion 142 slidably abuts against the inner circumferential surface of the front reservoir 110. The second pressure receiving portion 143 is formed from the radial outer end edge of the engaging portion 141 toward the rear. The diameter of the second pressure receiving portion 143 decreases as it extends rearward. The rear end of the second pressure receiving portion 143 is spaced apart from the inner circumferential surface of the front reservoir 110 and slidably abuts against the outer circumferential surface of the guide tube portion 23b.

[0077] The first biasing member 150 is disposed inside the guide tube portion 23b and biases the piston 140 forward. The first biasing member 150 is disposed behind the piston 140 in the front reservoir 110. The first biasing member 150 biases the piston 140 forward in the initial state before the trigger lever 6 is operated. As a result, the piston 140 and the piston guide 130 are positioned at their frontmost positions. The first biasing member 150 is a metal coil spring. However, for example, a resin spring or other elastic members may be used as the first biasing member 150.

[0078] Rear reservoir 120 is formed inside injection tube 23. Second communication hole 120a is formed between rear reservoir 120 and the plurality of through-holes 23a. A reservoir plunger 160 is disposed in rear reservoir 120 so as to be movable in the front-rear direction. Reservoir plunger 160 has a seal portion 161 that slides tightly in the front-rear direction along the inner wall of rear reservoir 120. Reservoir plunger 160 moves rearward as the content is supplied to rear reservoir 120. When reservoir plunger 160 is at its forward-most position, it closes second communication hole 120a, thereby blocking communication with front reservoir 110 through stem 10, and when reservoir plunger 160 moves rearward, it opens second communication hole 120a, allowing communication with front reservoir 110 through stem 10.

[0079] In the rear reservoir 120, the space located forward of the reservoir plunger 160 stores the contents that have passed through the stem 10. The space located forward of the reservoir plunger 160 in the rear reservoir 120 expands as the reservoir plunger 160 moves rearward due to the supply of the contents.

[0080] The rear reservoir 120 is provided with a second biasing member 170 that biases the reservoir plunger 160 forward. The second biasing member 170 biases the reservoir plunger 160 forward. The second biasing member 170 is disposed rearward of the reservoir plunger 160 in the rear reservoir 120. The second biasing member 170 biases the reservoir plunger 160 forward in the initial state before the trigger lever 6 is operated. As a result, the reservoir plunger 160 is positioned at the frontmost position. The second biasing member 170 is a metal coil spring. However, for example, a resin spring or other elastic members may be used as the second biasing member 170.

[0081] In rear reservoir 120 configured as described above, the contents can be pressurized within rear reservoir 120 until reservoir plunger 160 moves rearward. Thereafter, when the liquid pressure in rear reservoir 120 reaches a predetermined value, reservoir plunger 160 moves rearward against second biasing member 170. This allows the contents in rear reservoir 120 to be supplied to front reservoir 110.

[0082] Incidentally, piston 140 is capable of elastic deformation that allows communication between space S4 in front of piston 140 and space S3 behind piston 140 in front storage section 110, depending on the pressure of the contents, and restoration deformation that blocks communication between space S4 in front of piston 140 and space S3 behind piston 140 in front storage section 110. Note that elastic deformation of piston 140 refers to a state in which first pressure-receiving portion 142 elastically deforms radially inward, forming a gap between the front end of first pressure-receiving portion 142 and the inner circumferential surface of front storage section 110, through which the contents can flow, as shown in Fig. 4 .

[0083] Here, let the pressure of the content when the piston 140 elastically deform be P1, the pressure of the content when the piston 140 moves backward against the biasing force of the first biasing member 150 be P2, and the pressure of the content when the storage plunger 160 moves backward against the biasing force of the second biasing member 170 be P3. Then, the relationship of P1 < P2 < P3 holds. That is, before the piston 140 moves backward, the piston 140 elastically deforms. Also, before the storage plunger 160 moves backward, the piston 140 moves backward.

[0084] According to the ejector 1 having the above configuration, when the trigger lever 6 is operated and the stem 10 moves downward against the biasing force, as shown in FIG. 3, the content is supplied from the stem 10 to the rear storage portion 120. When the content is supplied to the rear storage portion 120, the pressure of the content in the rear storage portion 120 increases (pressure P3), and the storage plunger 160 moves backward against the biasing force of the second biasing member 170. When the storage plunger 160 moves backward, the second communication hole 120a formed in front of the rear storage portion 120 is opened, and the content in the rear storage portion 120 is supplied to the front storage portion 110 through the second communication hole 120a.

[0085] When the content is supplied to the front storage portion 110, the pressure of the content in the front storage portion 110 increases (pressure P1), and as shown in FIG. 4, the piston 140 elastically deforms, and the content is supplied from the space S3 behind the piston 140 to the space S4 in front in the front storage portion 110. When the pressure of the content in the front storage portion 110 further increases (pressure P2) due to the supply of the content from the rear storage portion 120 to the front storage portion 110, the piston 140 moves backward against the biasing force of the first biasing member 150.

[0086] As the piston 140 moves further rearward, as shown in FIG. 5, the engaging portion 141 engages with the rear end wall of the guide groove 133, and the piston guide 130 moves rearward. At this time, the undercut portion 132 moves rearward over the fitted portion 110b of the first communicating hole 110a. That is, the piston guide 130, which is undercut-fitted to the inner wall surface of the first communicating hole 110a, is pulled by the piston 140, detaches from the inner wall surface of the first communicating hole 110a, and moves rearward. The piston guide 130 has a plug portion 131 that closes the first communicating hole 110a formed in front of the front reservoir 110, and this rearward movement opens the first communicating hole 110a.

[0087] When first communication hole 110a is opened, space S4 in front of piston 140 in front reservoir 110 communicates with discharge hole 3a, and the pressure in space S4 in front of piston 140 in front reservoir 110 decreases. When the pressure in space S4 in front of piston 140 in front reservoir 110 decreases, piston 140 moves forward due to the biasing force of first biasing member 150, as shown in FIG.

[0088] When piston 140 moves forward, the volume of space S3 behind piston 140 in front reservoir 110 increases and the pressure in the rear space S3 decreases, causing piston 140 to undergo restoration deformation. When piston 140 undergoes restoration deformation, communication between space S4 in front of piston 140 in front reservoir 110 and space S3 behind piston 140 is blocked, and the forward movement of piston 140 pressurizes space S4 in front of piston 140 in front reservoir 110.

[0089] When space S4 in front of piston 140 in front storage portion 110 is pressurized, the contents in front storage portion 110 are supplied to discharge hole 3a via first communication hole 110a, and the contents are discharged to the outside. Here, piston guide 130 has undercut portions 132 that intermittently abut against the inner wall surface of first communication hole 110a in the circumferential direction, so the contents can pass through gaps in undercut portions 132 and flow out from front storage portion 110 to discharge hole 3a. Furthermore, because piston guide 130 in the non-engaged state abuts against the inner wall surface of first communication hole 110a or its vicinity by undercut portions 132, when piston 140 begins to move forward, it does not move forward with piston 140, and keeps first communication hole 110a in an open state.

[0090] When piston 140 moves further forward and exceeds the stroke at which it can move relative to piston guide 130, engaging portion 141 engages with the front end wall of guide groove 133, causing piston guide 130 to move forward together with piston 140, and plug portion 131 closes first communication hole 110a, as shown in FIG. 3. At this time, undercut portion 132 fits into fitting portion 110b of first communication hole 110a. That is, piston guide 130 is in an undercut-fit state with the inner wall surface of first communication hole 110a. When first communication hole 110a is closed, the pressure of the contents increases again in front storage portion 110 (pressure P1) due to the supply of contents from rear storage portion 120 to front storage portion 110. As shown in FIG. 4, piston 140 elastically deforms, and the contents are supplied from space S3 behind piston 140 to space S4 in front of piston 140 in front storage portion 110.

[0091] Thereafter, the cycle described above is repeated, and the pressure of the contents in rear reservoir 120 decreases, and the contents are intermittently discharged from discharge hole 3a until reservoir plunger 160 closes second communication hole 120a. Thus, according to the dispenser 1 of the present invention, the number of times the contents are dispensed from the dispenser 1 with one operation of the trigger lever 6 can be increased, thereby improving the cleansing effect and the massaging effect.

[0092] As described above, the dispenser 1 according to the present embodiment includes a stem 10 disposed at the mouth portion 2a of the container body 2 in which the content is stored so as to be movable downward in an upwardly biased state, a discharge head 20 provided at the upper end portion of the stem 10 and having a discharge hole 3a formed therein, and a trigger lever 6 linked to the discharge head 20. The discharge head 20 includes a front storage portion 110 in which a first communication hole 110a communicating with the discharge hole 3a is formed in the front, and a rear storage portion 120 disposed behind the front storage portion 110, in which a second communication hole 120a communicating with the front storage portion 110 is formed in the front and the content passing through the stem 10 is stored. The front storage portion 110 includes a plug portion 131 movably disposed in the front storage portion 110 and closing the first communication hole 110a at the most forward position, and an undercut portion 132 that intermittently contacts the inner wall surface of the first communication hole 110a in the circumferential direction and is detachably fitted in the front-rear direction. The front storage portion 110 further includes a piston guide 130 having the undercut portion 132, a piston 140 engaged with the piston guide 130 so as to be relatively movable within a predetermined range in the front-rear direction and moving rearward together with the piston guide 130 as the content is supplied to the front storage portion 110, and a first biasing member 150 that biases the piston 140 forward. The rear storage portion 120 includes a storage plunger 160 movably disposed in the rear storage portion 120 and closing the second communication hole 120a at the most forward position and moving rearward as the content is supplied to the rear storage portion 120, and a second biasing member 170 that biases the storage plunger 160 forward. The piston 140 is capable of elastic deformation that allows communication between the space S4 in front of the piston 140 and the space S3 behind the piston 140 in the front storage portion 110, and restoration deformation that blocks communication between the space S4 in front of the piston 140 and the space S3 behind the piston 140 in the front storage portion 110, according to the pressure of the content. Let the pressure of the content when the piston 140 undergoes elastic deformation be P1, the pressure of the content when the piston 140 moves rearward against the biasing force of the first biasing member 150 be P2, and the pressure of the content when the storage plunger 160 moves rearward against the biasing force of the second biasing member 170 be P3. Then, the relationship P1 < P2 < P3 holds. According to this configuration, the number of times the contents are discharged from the dispenser 1 with one operation of the trigger lever 6 can be increased, and the cleaning effect and the massaging effect can be improved.

[0093] Moreover, in this embodiment, piston 140 includes first pressure receiving portion 142 facing forward, and second pressure receiving portion 143 facing rearward and having a smaller pressure receiving area than first pressure receiving portion 142. With this configuration, piston 140 can be moved rearward due to the difference between the pressure receiving area for pressure applied to the front side of piston 140 and the pressure receiving area for pressure applied to the rear side of piston 140.

[0094] In addition, this embodiment includes a lower piston 40A provided in the stem 10, an upper piston 40B provided in the stem 10 above the lower piston 40A, a lower cylinder 30A that houses the lower piston 40A so that it can slide up and down, an upper cylinder 30B that is connected above the lower cylinder 30A, has an interior that is vertically connected to the interior of the lower cylinder 30A, has an inner diameter smaller than that of the lower cylinder 30A, and houses the upper piston 40B so that it can slide up and down, and a valve section 80 that allows communication between a space S1 below the lower piston 40A inside the lower cylinder 30A and a space S2 above when the stem 10 moves downward, and blocks communication between the space S1 below the lower piston 40A inside the lower cylinder 30A and the space S2 above when the stem 10 moves upward. According to this configuration, when the trigger lever 6 is operated and the stem 10 moves downward against the biasing force, the contents filled inside the upper cylinder 30B are pressurized by the upper piston 40B and supplied to the discharge head 20 through the stem 10. When the stem 10 moves downward, the valve unit 80 allows communication between the space S1 below the lower piston 40A inside the lower cylinder 30A and the space S2 above. As a result, the contents are discharged from inside the upper cylinder 30B, and the inside of the lower cylinder 30A, which is in vertical communication with the inside of the upper cylinder 30B, is filled with the contents from the space S1 below the lower piston 40A. When the trigger lever 6 is released and the stem 10 moves upward due to the bias, the valve portion 80 blocks communication between the space S1 below the lower piston 40A inside the lower cylinder 30A and the space S2 above it. The contents stored inside the lower cylinder 30A are then pressurized by the lower piston 40A, which moves upward together with the stem 10. While the volume inside the upper cylinder 30B increases due to the upper piston 40B moving upward together with the stem 10, the decrease in the volume of the lower cylinder 30A is greater than the increase in the volume of the upper cylinder 30B because the inner diameter of the upper cylinder 30B is smaller than the inner diameter of the lower cylinder 30A. As a result, the contents are supplied to the discharge head 20 by the difference between the volume (internal volume) of the lower cylinder 30A and the volume (internal volume) of the upper cylinder 30B. In other words, the interiors of the lower cylinder 30A and the upper cylinder 30B are pressurized as a whole. Then, when the trigger lever 6 linked to the stem 10 returns to its original position, the contents inside the upper cylinder 30B are pressurized and the contents are discharged to the outside through the stem 10 and the discharge hole 3a. In this way, not only are the contents ejected when the trigger lever 6 is operated, but the contents can also be supplied to the ejection head 20 when the trigger lever 6 returns to its original position. This increases the amount of contents supplied to the ejection head 20 with one operation of the trigger lever 6, and increases the number of intermittent ejections of the contents from the ejection head 20.

[0095] The technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

[0096] In addition, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, without departing from the spirit of the present invention. [Explanation of symbols]

[0097] 1 Dispenser 2 Container body 2a Mouth 3 Pump section 3a Discharge hole 4 Mounting cap 5 Support member 6 Trigger Lever 10 Stem 11 Guide member 11b Mouth attachment part 12 Communication hole 13 Mounting groove 14 Rod section 20 Discharge head 20a Shaft 21 Nozzle section 21a Fixing member 22 Relay Section 22a Nozzle mounting part 23 Injection cylinder part 23a Through hole 23b Guide tube part 24 Lid 30 cylinders 30A Lower Cylinder 30B Upper Cylinder 31 Outer cylinder member 31a Upper cylinder part 31b Lower cylinder part 31c Connecting tube 31d valve seat 31e Regulating protrusion 31f Support plate part 31g First air vent 32 Inner cylinder member 32a Lower cylinder forming part 32b Upper cylinder forming part 32c Regulatory Department 32d flange 32e Standing cylinder part 32f Second air vent 32g Annular groove 33 Valve body 34 Coil spring 35 Packing material 40A Lower Piston 40B Upper piston 41A base 41B Continuous cylinder part 42A sliding part 42B Cylindrical sliding part 43A Seal cylinder 44A Spring support 50 sealing material 51 Surrounding tube 51a Opposite part 52 Guide tube 54 Inner hanging cylinder part 55 Outer hanging tube part 56 Side wall 57 Rear wall 58 Shaft 59 Reinforced Wall 61 Top plate 62 Front plate part 63 Side plate part 64 Opening 70 Stopper 71 Rotation axis 72 Main operation surface 73 Operation aspects 74 Regulating plate 80 Valve section 100 Intermittent discharge mechanism 110 Front reservoir 110a 1st communication hole 110b Mated part 111 Upper cylinder member 112 Lower cylinder member 112a Fitting groove 113 Pipe attachment 114 Pipe members 120 Rear reservoir 120a 2nd communication hole 130 Piston guide 131 Plug part 132 Undercut section 133 Guide groove 140 piston 141 Engagement part 142 First pressure receiving part 143 Second pressure receiving part 150 First biasing member 160 Reservoir Plunger 161 Seal part 170 second biasing member O1 Container axis O2 center axis P1 pressure P2 pressure P3 Pressure S1 space S2 space S3 space S4 Space

Claims

1. a stem disposed in an opening of a container body in which contents are accommodated, and movable downward in an upward biased state; a discharge head provided at an upper end of the stem and having a discharge hole; a trigger lever connected to the discharge head, The ejection head includes: a front reservoir portion having a first communication hole formed in the front portion and communicating with the discharge hole; a rear reservoir portion disposed behind the front reservoir portion, having a second communication hole formed in the front portion and communicating with the front reservoir portion, and in which the content that has passed through the stem is stored; The front reservoir is a stopper portion that is movably disposed within the front reservoir portion and closes the first communication hole at a forward-most position; and a piston guide that has an undercut portion that intermittently abuts against an inner wall surface of the first communication hole in a circumferential direction and is detachably fitted in a front-rear direction; a piston that engages with the piston guide so as to be relatively movable within a predetermined range in the front-rear direction and moves rearward together with the piston guide as the contents are supplied to the front storage section; a first biasing member that biases the piston forward, The rear reservoir is a storage plunger that is movably disposed within the rear storage portion, closes the second communication hole at a forward-most position, and moves rearward as the content is supplied to the rear storage portion; a second biasing member that biases the storage plunger forward, the piston is capable of elastic deformation in response to the pressure of the contents, allowing communication between a space in front of the piston and a space behind the piston in the front storage section, and restoring deformation in response to the pressure of the contents, blocking communication between the space in front of the piston and a space behind the piston in the front storage section, The pressure of the contents when the piston is elastically deformed is P1, The pressure of the contents when the piston moves rearward against the biasing force of the first biasing member is defined as P2, When the pressure of the contents when the storage plunger moves rearward against the biasing force of the second biasing member is P3, P1<P2<P3 Dispenser.

2. The piston includes a first pressure receiving portion facing forward and a second pressure receiving portion facing rearward and having a smaller pressure receiving area than the first pressure receiving portion. The dispenser of claim 1 .

3. a lower piston provided at a lower part of the stem; an upper piston provided on the stem above the lower piston; a lower cylinder that accommodates the lower piston so that it can slide up and down; an upper cylinder connected to the upper cylinder, the interior of which is in vertical communication with the interior of the lower cylinder, the upper cylinder having an inner diameter smaller than that of the lower cylinder, and the upper piston accommodated therein so as to be vertically slidable; a valve portion that allows communication between a space below the lower piston and a space above it inside the lower cylinder when the stem moves downward, and that blocks communication between the space below the lower piston and a space above it inside the lower cylinder when the stem moves upward. The dispenser according to claim 1 or 2.

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