Discharger

Abstract

To increase a discharge quantity of a content of a discharger by one operation of a trigger lever and to enable uninterrupted discharge.SOLUTION: A discharger 1 comprises: a first piston 40A and a second piston 40B which are attached to a stem 10; a first cylinder 30A which accommodates the first piston 40A; a second cylinder 30B which has an inner diameter smaller than the first cylinder 30A, and accommodates the second piston 40B; a valve part 80 which permits communication between a space S1 below and a space S2 above the first piston 40A when the stem 10 moved downward, and blocks communication between the space S1 below and the space S2 above the first piston 40A when the stem 10 moves upward; a storge part 100 which is provided in a discharge head 20, and in which a content is stored; a storage plunger 101 which moves in association with supply of the content into the storge part 100; and an energization member 102 which energizes the storge plunger 101 toward a discharge hole 3a.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a dispenser.

Background Art

[0002] Conventionally, a dispenser described in Patent Document 1 below has been known. This dispenser includes a stem that is disposed so as to be movable downward in an upwardly biased state, a discharge head attached to the upper end of the stem and having a discharge hole for the content, a trigger lever for pushing down the discharge head, a cylindrical piston interlocked with the stem, and a cylinder in which the piston is accommodated so as to be slidable up and down. When the trigger lever is pulled, the piston moves downward together with the stem, and the content in the cylinder pressurized by the piston is discharged from the discharge hole through the stem.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, there is a demand for a conventional dispenser to discharge (apply, adhere) the content over a wide range and to extend the discharge time of the content. For this reason, it is required to increase the discharge amount of the content by one operation of the trigger lever and to enable a discharge that is less likely to be interrupted.

[0005] The present invention has been made in view of such circumstances, and an object thereof is to increase the discharge amount of the content of the dispenser by one operation of the trigger lever and to enable a discharge that is less likely to be interrupted.

Means for Solving the Problems

[0006] (1) The dispenser according to the present invention includes a stem disposed at the mouth of a container body for accommodating contents, the stem being movable downward in an upwardly biased state, a discharge head having a discharge hole formed therein and communicating with the inside of the stem, a trigger lever linked to the discharge head, a first piston provided on the stem, a second piston provided on the stem at a position different from the first piston in the vertical direction, a first cylinder for slidably accommodating the first piston in the vertical direction, a second cylinder connected to the first cylinder and having an interior vertically communicating with the interior of the first cylinder and a smaller inner diameter than the first cylinder, the second cylinder slidably accommodating the second piston in the vertical direction, a valve portion that allows communication between a space below the first piston and a space above the first piston inside the first cylinder when the stem moves downward, and blocks communication between the space below the first piston and the space above the first piston inside the first cylinder when the stem moves upward, a storage portion provided inside the discharge head for storing the contents that have passed through the stem, a storage plunger movably disposed inside the storage portion and moving toward the side opposite to the discharge hole as the contents are supplied to the storage portion, and a biasing member for biasing the storage plunger toward the discharge hole.

[0007] According to the dispenser of the present invention, when the trigger lever is operated and the stem moves downward against the bias, the contents filled inside the second cylinder are pressurized by the second piston and discharged to the outside through the discharge hole via the stem. When the stem moves downward, the valve portion allows communication between the space below the first piston and the space above the first piston inside the first cylinder. Then, while the contents are being discharged from inside the second cylinder, the inside of the first cylinder that vertically communicates with the inside of the second cylinder is filled with the contents from the space below the first piston. When the trigger lever is released and the stem moves upward by biasing, the valve part blocks the communication between the space below the first piston and the space above the first piston inside the first cylinder. Then, the content filled inside the first cylinder is pressurized by the first piston that moves upward together with the stem. Here, inside the second cylinder, although the volume increases due to the second piston that moves upward together with the stem, since the inner diameter of the second cylinder is smaller than the inner diameter of the first cylinder, the decrease in the volume of the first cylinder is larger than the increase in the volume of the second cylinder. As a result, the content is discharged from the discharge hole by the difference between the volume (inner volume) of the first cylinder and the volume (inner volume) of the second cylinder. That is, the inside of the first cylinder and the inside of the second cylinder are in a pressurized state as a whole. Then, even when the trigger lever linked to the stem returns to its original position, the content inside the second cylinder is pressurized, and the content is discharged to the outside from the discharge hole through the stem. By the way, after finishing pulling the trigger lever and while releasing the hand and the trigger lever starts to return to its original position, the supply of the content from the second cylinder to the stem temporarily stops. However, a storage part for the content is provided in the discharge head communicating with the stem, and the content is stored in advance. When the supply of the content from the second cylinder to the stem temporarily stops, the storage plunger moves toward the discharge hole, and thereby, the content filled in the storage part can be pushed out from the inside of the storage part toward the discharge hole side. Therefore, it is possible to perform the discharge of the content without interruption. As described above, according to the dispenser according to the present invention, not only the content is discharged when the trigger lever is operated, but also after finishing pulling the trigger lever and until the operation of releasing the hand and the trigger lever starts to return to its original position, and further, the content can be discharged even when the trigger lever returns to its original position. For this reason, it is possible to increase the discharge amount of the content by one operation of the trigger lever and enable a discharge that is less likely to be interrupted.

[0008] (2) A supply hole that communicates the discharge hole with the inside of the stem is formed in the discharge head, and the storage plunger may block the supply hole at the foremost position on the discharge hole side to cut off the communication with the discharge hole through the inside of the stem.

[0009] In this case, since the storage plunger functions as a pressure accumulator valve, the pressure at which the content is discharged can be adjusted to a predetermined value, and the state of discharge of the content (discharge pattern, etc.) can be maintained constant.

Advantages of the Invention

[0010] According to the dispenser of the present invention, it is possible to increase the discharge amount of the content of the dispenser by one operation of the trigger lever and enable a discharge that is less likely to be interrupted.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Mode for Carrying Out the Invention

[0012] Hereinafter, with reference to the drawings, a dispenser according to each embodiment of the present invention will be described.

[0013] (First Embodiment) The discharger 1 shown in Fig. 1 includes a pump section 3 that discharges the contents from a bottomed cylindrical container body 2, a mounting cap 4 that mounts the pump section 3 to the mouth portion 2a of the container body 2, a trigger lever 6 linked 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 first piston 40A, and a second piston 40B.

[0014] The mounting cap 4, the stem 10, the cylinder 30, the first piston 40A, and the second piston 40B are arranged in a state where their respective central axes are located on a common axis. Hereinafter, this common axis is referred to as the container axis O, and the direction along the container axis O is referred to as the vertical direction. Also, in a plan view seen from the vertical direction, the direction intersecting the container axis O is referred to as the radial direction, and the direction orbiting around the container axis O is referred to as the circumferential direction.

[0015] Also, the direction in which the discharge head 20 extends in a plan view is referred to as the front-rear direction. Along the front-rear direction, the side of the discharge head 20 on the discharge hole 3a side is referred to as the front, and the side opposite to the discharge hole 3a of the discharge head 20 is referred to as the rear. The direction orthogonal to both the vertical direction and the front-rear direction is referred to as the left-right direction.

[0016] The mounting cap 4 is formed in a toped cylindrical shape with an opening formed at the center. On the inner peripheral surface of the mounting cap 4, a female screw is formed that screws onto the male screw formed on the outer peripheral surface at the mouth portion 2a of the container body 2.

[0017] The support member 5 is mounted on the upper end portion of the cylinder 30 inserted through the opening of the mounting cap 4. The support member 5 includes a toped cylindrical surrounding cylinder portion 51 externally mounted on the upper end portion 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 at intervals in the left-right direction, and a rear wall portion 57 connecting the rear end edges of the side wall portions 56 in the left-right direction.

[0018] The top wall of the surrounding cylinder part 51 is formed in an annular shape with an opening at the center, and a guide cylinder 52 is continuously provided at the inner peripheral edge of this top wall. A stem 10 is inserted into the guide cylinder 52 so as to be movable in the vertical direction. On the lower surface of the top wall of the surrounding cylinder part 51, an inner hanging cylinder part 54 through which the stem 10 is inserted inward and an outer hanging cylinder part 55 arranged between the inner hanging cylinder part 54 and the peripheral wall of the surrounding cylinder part 51 are formed.

[0019] On the peripheral surface of the lower end part of the peripheral wall of the surrounding cylinder part 51, a facing part 51a is formed which faces the top wall part of the mounting cap 4 in the vertical direction with a gap therebetween. The outer hanging cylinder part 55 is fitted inside the upper end part of the cylinder 30. The inner hanging cylinder part 54 is continuously provided with the guide cylinder 52.

[0020] The pair of side wall parts 56 gradually extend upward from the front side toward the rear side. At the upper ends of the pair of side wall parts 56, a shaft body 58 protrudes outward in the left - right direction. The shaft body 58 is arranged behind the stem 10. The shaft body 58 serves as the swing axis of the trigger lever 6. On the inner surface of the rear wall part 57, a reinforcing wall 59 is formed which protrudes upward and integrally connects the inner surfaces of the pair of side wall parts 56 in the left - right direction.

[0021] The trigger lever 6 is attached to the support member 5 via the shaft body 58. Thereby, the trigger lever 6 is connected to the support member 5 so as to be swingable about an axis extending in the left - right direction. The trigger lever 6 has a top plate part 61 that covers the discharge head 20 from above, a front plate part 62 that gradually extends downward from the front edge of the top plate part 61 toward the front, and a pair of side plate parts 63 that extend downward from the side edges on both the left and right sides of the top plate part 61 and face each other in the left - right direction.

[0022] In the internal space surrounded by the top plate portion 61 and the pair of side plate portions 63, the discharge head 20 is disposed. The pair of side plate portions 63 are arranged so as to sandwich the discharge head 20 from the left and right directions. The top plate portion 61 has a smoothly curved shape that bulges upward, and the rear end portion thereof is in contact with the upper end portion of the rear wall portion 57 of the support member 5 from above. Thereby, further upward swinging of the trigger lever 6 about the shaft body 58 is restricted.

[0023] In the front side portion of the top plate portion 61, a through hole 64 penetrating the top plate portion 61 is formed. The through hole 64 is formed in the central portion in the left - right direction of the top plate portion 61 and opens forward. Thereby, the front side portion of the top plate portion 61 has a bifurcated shape in the left - right direction. The front plate portion 62 extends gradually downward from the front edge of the bifurcated top plate portion 61 toward the front.

[0024] The nozzle cylinder portion 22 of the discharge head 20 is inserted into the through hole 64. The nozzle cylinder portion 22 projects forward from the front plate portion 62 through the through hole 64. The pair of side plate portions 63 of the trigger lever 6 sandwich the upper portions of the pair of side wall portions 56 of the support member 5 in the left - right direction. The lower side portion of the front plate portion 62 is a finger - hanging portion for hanging a fingertip.

[0025] In the trigger lever 6, an engagement groove that engages with the shaft portion 23 of the discharge head 20 is formed at the lower end of the plate portion that projects inward in the left - right direction from the pair of side plate portions 63. In the above configuration, when the trigger lever 6 is swung downward about the shaft body 58, the shaft portion 23 of the discharge head 20 is pushed downward by the trigger lever 6, and the stem 10 moves downward.

[0026] The stem 10 is formed in a cylindrical shape extending in the vertical direction and is provided inside the guide cylinder 52 so as to be movable downward in an upwardly biased state. A piston guide 11 is fitted to the stem 10 from below. The piston guide 11 extends downward beyond the lower end of the stem 10. The piston guide 11 is a part of the components of the stem 10. When the discharge 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 piston guide 11 may be integrally formed.

[0027] A communication hole 12 is formed in the outer peripheral surface of the piston guide 11 extending downward from the stem 10. The communication hole 12 communicates the inside of the stem 10 with the inside of the cylinder 30 via the inside of the piston guide 11. An attachment groove 13 for attaching the first piston 40A is formed in an annular shape on the peripheral surface of the lower end of the piston guide 11.

[0028] The piston guide 11 includes a rod portion 14 extending downward from the first piston 40A. The lower end of the rod portion 14 is located directly above a valve body 33, which will be described later, when the stem 10 is in the lowered end position. Thereby, the valve body 33 is restricted from moving upward away from the regulating protrusion 31e.

[0029] A discharge head 20 having a discharge hole 3a formed at its upper end is provided at the upper end of the stem 10. A shaft portion 23 protruding in the left - right direction is formed on the outside of the discharge head 20. The discharge head 20 includes a cylindrical nozzle cylinder portion 22 protruding forward from the upper end of the stem 10 and a storage cylinder 27 communicating with the rear end portion of the nozzle cylinder portion 22 and protruding rearward from the upper end of the stem 10.

[0030] Inside the nozzle cylinder portion 22, a supply hole 22a that communicates the flow path inside the nozzle cylinder portion 22 in the front - rear direction is formed. The rear side of the supply hole 22a in the nozzle cylinder portion 22 communicates with the inside of the storage cylinder 27. The rear end opening of the storage cylinder 27 is closed by a lid member 24. A stopper 70 for restricting the downward movement of the stem 10 can be locked to the lower end of the storage cylinder 27.

[0031] The stopper 70 is provided so as to be swingable around the rotation axis 71 and restricts the downward movement of the discharge head 20. The stopper 70 is disposed so as to be movable between a restricting position that restricts the downward movement of the discharge head 20 and a restriction release position that swings backward around the rotation axis 71 with respect to the restricting position and allows the downward movement of the discharge head 20. Both end portions of the rotation axis 71 in the left-right direction are pivotally supported by the surrounding cylinder portion 51.

[0032] The stopper 70 has an operation main surface 72, a pair of operation side surfaces 73 connected to the operation main surface 72, and a restricting plate portion 74 provided on the pair of operation side surfaces 73 and provided so as to be intervenable between the discharge head 20 and the guide cylinder 52. The pair of operation side surfaces 73 are formed in a fan shape when viewed from the left-right direction, and the rotation axis 71 is disposed at the central angle portion thereof. The restricting plate portion 74 is formed in a semi-cylindrical shape with the front side open.

[0033] When the stopper 70 is brought close to the stem 10 to be in a locked state, the restricting plate portion 74 restricts the pressing down of the discharge head 20. When the stopper 70 is separated from the stem 10 to be in a non-locked state, the restriction on pressing down by the restricting plate portion 74 is released. According to this configuration, it becomes possible to provide the operation main surface 72 of the stopper 70 at a position (rearward) outside the support member 5, and since the stopper 70 can have a large configuration, the stopper 70 can be made easy to operate.

[0034] A mandrel body 25 extending in the front-rear direction and a nozzle tip 26 having a top-shaped cylinder attached to the front end portion of the mandrel body 25 are provided in front of the supply hole 22a in the nozzle cylinder portion 22. A plurality of flow path grooves are formed on the outer peripheral surface of the mandrel body 25 so as to extend in the front-rear direction and allow the flow of the content between the inner peripheral surface of the nozzle cylinder portion 22.

[0035] The nozzle tip 26 is disposed coaxially with the mandrel body 25 and is formed in a capped cylindrical shape with the front end portion of the mandrel body 25 inserted therein. The peripheral wall of the nozzle tip 26 is fitted within the nozzle cylinder portion 22. The top wall of the nozzle tip 26 abuts against the front end face of the mandrel body 25. On the rear face of the top wall of the nozzle tip 26 that abuts against the front end face of the mandrel body 25, a spin flow path communicating with the flow path groove of the mandrel body 25 is formed. At the central portion of the top wall of the nozzle tip 26, a discharge hole 3a communicating with the spin flow path opens forward.

[0036] The first piston 40A is attached to the attachment groove 13 of the piston guide 11 of the stem 10. The first piston 40A includes a base portion 41A, a sliding portion 42A, a seal cylinder portion 43A, and a spring receiving portion 44A. The base portion 41A is formed in a disc shape in plan view and extends radially outward from the piston guide 11.

[0037] The sliding portion 42A extends upward in a cylindrical shape from the outer peripheral edge of the base portion 41A. The sliding portion 42A is formed in an inverted conical shape that expands in diameter and gradually becomes thinner as it goes upward. The upper end portion of the sliding portion 42A is easily elastically deformed in the radial direction and is slidably in contact with the inner wall surface of the first cylinder 30A (described later) in the vertical direction. The sliding portion 42A forms a valve portion 80 (described later).

[0038] The seal cylinder portion 43A extends upward in a cylindrical shape from the central portion on the upper surface of the base portion 41A. The inner peripheral surface of the seal cylinder portion 43A is in close contact with the outer peripheral surface of the piston guide 11. The spring receiving portion 44A is vertically provided from the lower surface of the base portion 41A. A step for receiving the upper end portion of the coil spring 34 is formed on the outer peripheral surface of the spring receiving portion 44A.

[0039] The second piston 40B is provided above the first piston 40A on the stem 10. The second piston 40B includes a continuous cylinder portion 41B and a cylindrical sliding portion 42B. The continuous cylinder portion 41B is formed in an annular shape that extends radially outward from the outer peripheral surface of the piston guide 11.

[0040] The cylindrical sliding part 42B is connected to the radially outer end of the continuous cylindrical part 41B and extends vertically from this part. The upper end of the cylindrical sliding part 42B faces vertically opposite the lower end of the inner hanging cylinder part 54 with the sealing member 50 interposed therebetween. The lower end of the cylindrical sliding part 42B is in slidable contact with the inner wall surface of the second cylinder 30B (described later) in the vertical direction. Note that the continuous cylindrical part 41B is located above the communication hole 12 on the outer peripheral surface of the piston guide 11.

[0041] The cylinder 30 includes an outer cylinder member 31 and an inner cylinder member 32 assembled inside the outer cylinder member 31. The outer cylinder member 31 is formed in a multi-stage cylindrical shape. The outer cylinder member 31 includes an upper cylinder part 31a extending in the vertical direction, a lower cylinder part 31b extending downward from the lower end of the upper cylinder part 31a and having a smaller inner diameter and outer diameter than the upper cylinder part 31a, and a connecting cylinder part 31c extending downward from the lower end of the lower cylinder part 31b and having a smaller inner diameter and outer diameter than the lower cylinder part 31b.

[0042] The inner cylinder member 32 is fitted inside the upper cylinder part 31a. The lower end of the inner cylinder member 32 abuts on the upper surface of the step part between the upper cylinder part 31a and the lower cylinder part 31b. A first air hole 31g for communicating the inside and outside of the upper cylinder part 31a is formed in the upper part of the upper cylinder part 31a. An annular support plate part 31f protruding radially outward is formed at the upper end of the upper cylinder part 31a. The lower surface of the top wall part of the mounting cap 4 abuts on the outer peripheral part of the upper surface of the support plate part 31f.

[0043] A packing material 35 is disposed between the support plate part 31f and the upper end opening edge of the mouth part 2a of the container body 2. By screwing the mouth part mounting part 11b of the mounting cap 4 to the mouth part 2a, the support plate part 31f and the packing material 35 are fixed between the top wall of the mounting cap 4 and the mouth part 2a.

[0044] Inside the lower cylinder part 31b, a coil spring 34 is disposed. The upper end part of the coil spring 34 extends from the lower cylinder part 31b into the upper cylinder part 31a and abuts against the spring receiving part 44A of the first piston 40A. Thereby, the stem 10 receives an upward biasing force from the coil spring 34 via the first piston 40A and the piston guide 11.

[0045] At the lower end part of the lower cylinder part 31b, a tapered valve seat 31d with a gradually decreasing inner diameter is formed as it goes downward. A valve body 33 is seated on the valve seat 31d so as to be detachable upward. The valve body 33 is a so-called ball valve formed in a spherical shape. Note that the valve body 33 may be a check valve using various valve bodies instead of the ball valve.

[0046] On the inner peripheral surface of the lower cylinder part 31b, a regulating projection 31e that gradually extends upward is protruding from the outer side in the radial direction toward the inner side. The inner diameter at the upper end of the regulating projection 31e is smaller than the outer diameter of the valve body 33. Thereby, the valve body 33 is regulated from detaching upward from the regulating projection 31e. Note that a gap that interrupts the circumferential extension is formed in the regulating projection 31e.

[0047] The connecting cylinder part 31c communicates with the lower end part of the lower cylinder part 31b via the valve body 33. A pipe attachment 113 is attached to the connecting cylinder part 31c. The pipe attachment 113 includes a pipe member 114 that extends to the vicinity of the bottom of the container body 2 and communicates the lower end opening of the outer cylinder member 31 and the upper end opening of the pipe member 114. Note that a non-illustrated upright and inverted dual-purpose adapter for supplying the content into the cylinder 30 when the cylinder 30 is in a negative pressure state both when the ejector 1 is upright and inverted may be connected to the connecting cylinder part 31c.

[0048] The inner cylinder member 32 includes a first cylinder forming portion 32a, a second cylinder forming portion 32b, a restricting portion 32c, a flange portion 32d, and a standing cylinder portion 32e. The first cylinder forming portion 32a forms the lower end portion of the inner cylinder member 32. The first cylinder forming portion 32a is formed in a cylindrical shape extending 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 first cylinder forming portion 32a.

[0049] The first cylinder forming portion 32a forms a first cylinder 30A that houses the first piston 40A. An annular groove 32g that is recessed radially outward is formed in the lower portion of the inner wall surface of the first cylinder forming portion 32a. When the stem 10 is at the descending end position, the upper end portion of the sliding portion 42A of the first piston 40A is disposed in the annular groove 32g.

[0050] The second cylinder forming portion 32b extends upward from the upper end portion of the first cylinder forming portion 32a. The second cylinder forming portion 32b has a smaller inner diameter and outer diameter than the first cylinder forming portion 32a. The second cylinder forming portion 32b forms a second cylinder 30B that houses the second piston 40B.

[0051] A second air hole 32f that communicates the inside and outside of the second cylinder forming portion 32b is formed in the upper portion of the second cylinder forming portion 32b. The second air hole 32f communicates with the first air hole 31g through a gap (annular space) between the second cylinder forming portion 32b and the upper cylinder portion 31a on the outside. When the stem 10 is at the ascending end position, the second air hole 32f is not blocked by the cylindrical sliding portion 42B of the second piston 40B and is open.

[0052] The restricting portion 32c is formed in a cylindrical shape and is continuously provided at the stepped portion between the first cylinder forming portion 32a and the second cylinder forming portion 32b. When the stem 10 is at the upper end 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 first piston 40A that is biased upward by the coil spring 34. When the stem 10 is at the lower end 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 second piston 40B.

[0053] The flange portion 32d protrudes radially outward from the upper end portion of the second cylinder forming portion 32b and is disposed on the upper end opening edge of the upper cylinder portion 31a. The flange portion 32d is fixed on the upper end opening edge of the upper cylinder portion 31a by the surrounding cylinder portion 51 of the support member 5. An upright cylinder portion 32e extending upward is formed on the upper surface of the flange portion 32d. The upright cylinder portion 32e forms the upper end portion of the cylinder 30. That is, the surrounding cylinder portion 51 is externally mounted on the outside of the upright cylinder portion 32e, and the outer hanging cylinder portion 55 is fitted inside the upright cylinder portion 32e.

[0054] The inner cylinder member 32 is formed by an upper cylinder member 111 and a lower cylinder member 112. The upper cylinder member 111 constitutes the upper portion of the inner cylinder member 32. The upper cylinder member 111 forms the above-described second cylinder forming portion 32b, flange portion 32d, and upright cylinder portion 32e. The lower cylinder member 112 constitutes the lower portion of the inner cylinder member 32. The lower cylinder member 112 forms the above-described first cylinder forming portion 32a and restricting portion 32c. A fitting groove portion 112a into which the lower end portion of the upper cylinder member 111 is fitted is formed at the upper end portion of the lower cylinder member 112.

[0055] In the ejector 1 having the above configuration, there are formed a first cylinder 30A that accommodates the first piston 40A so as to be vertically slidable, and a second cylinder 30B that is continuously provided at the upper end of the first cylinder 30A, has an interior that communicates vertically with the interior of the first cylinder 30A, and has a smaller inner diameter than the first cylinder 30A and accommodates the second piston 40B so as to be vertically slidable.

[0056] A valve portion 80 is provided at a sliding portion 42A of the first piston 40A with the first cylinder 30A. When the stem 10 moves downward, the valve portion 80 elastically deforms radially inward to allow communication between a space S1 below the first piston 40A and a space S2 above it inside the first cylinder 30A. Also, when the stem 10 moves upward, the valve portion 80 restores and deforms radially outward to block communication between the space S1 below the first piston 40A and the space S2 above it inside the first cylinder 30A.

[0057] Inside the storage cylinder 27 (storage portion 100) of the discharge head 20, the content that has passed through the stem 10 is supplied by the backward swing of the trigger lever 6. Specifically, a communication hole communicating with the inside of the stem 10 is formed in the lower portion of the front end of the storage cylinder 27. Thereby, the content that has passed through the stem 10 can be supplied to the storage portion 100 through the communication hole.

[0058] A storage plunger 101 is disposed in the storage portion 100 so as to be movable in the front-rear direction. The storage plunger 101 slides tightly in the front-rear direction along the inner wall of the storage cylinder 27. The storage plunger 101 moves backward (toward the side opposite to the discharge hole 3a) as the content is supplied to the storage portion 100. The storage plunger 101 blocks communication with the discharge hole 3a through the stem 10 by closing the supply hole 22a at the most forward position, and allows communication with the discharge hole 3a through the stem 10 by opening the supply hole 22a when moving backward.

[0059] In the storage portion 100, the content that has passed through the stem 10 is stored in the space located in front of the storage plunger 101. The space in front of the storage plunger 101 in the storage portion 100 expands as the storage plunger 101 moves backward due to the supply of the content.

[0060] The storage unit 100 is provided with a biasing member 102 that biases the storage plunger 101 toward the discharge hole 3a. The biasing member 102 biases the storage plunger 101 forward (toward the discharge hole 3a). The biasing member 102 is disposed behind the storage plunger 101 in the storage unit 100. The biasing member 102 biases the storage plunger 101 forward in the initial state before the trigger lever 6 is operated. As a result, the storage plunger 101 is located at the foremost position. Note that the biasing member 102 is a metal coil spring. However, for example, a resin spring may be used as the biasing member 102, or other elastic members may be used.

[0061] In the storage cylinder 27 and the storage plunger 101 configured as described above, it is possible to pressurize the contents within the storage unit 100 until the storage plunger 101 moves rearward. Thereafter, when the hydraulic pressure in the storage unit 100 reaches a predetermined value, the storage plunger 101 moves rearward against the biasing member 102. As a result, the contents of the storage unit 100 can be supplied to the discharge hole 3a side.

[0062] When using the ejector 1 configured as above, first, the stopper 70 is swung from the regulating position to the regulating release position so that the trigger lever 6 and the stem 10 can move downward. Next, as shown in FIG. 2, the trigger lever 6 is rotated downward about the shaft body 58.

[0063] At this time, while hanging the fingertips on the finger-hooking portion of the front plate portion 62 of the trigger lever 6, the trigger lever 6 is rotated downward. 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.

[0064] Specifically, when the trigger lever 6 is operated and the stem 10 moves downward against the biasing force, the contents filled inside the second cylinder 30B are pressurized by the second piston 40B, rise within the stem 10 through the communication hole 12 of the piston guide 11, and are introduced into the discharge head 20, and discharged from the discharge hole 3a.

[0065] When the stem 10 moves downward, the valve portion 80 elastically deforms radially inward as shown in FIG. 3(b), and allows communication between the space S1 below the first piston 40A and the space S2 above it inside the first cylinder 30A. Then, while the contents are being discharged from inside the second cylinder 30B, the inside of the first cylinder 30A that communicates vertically with the inside of the second cylinder 30B is filled with the contents from the space S1 below the first piston 40A.

[0066] When the trigger lever 6 is released and the stem 10 moves upward by the biasing force, the valve portion 80 restores and deforms as shown in FIG. 3(a), and blocks the communication between the space S1 below the first piston 40A and the space S2 above it inside the first cylinder 30A. Then, the contents filled inside the first cylinder 30A are pressurized by the first piston 40A that moves upward together with the stem 10.

[0067] Here, inside the second cylinder 30B, as shown in FIG. 1, although the volume increases due to the second piston 40B that moves upward together with the stem 10, the inner diameter of the second cylinder 30B is smaller than the inner diameter of the first cylinder 30A. Therefore, the decrease in the volume of the first cylinder 30A is greater than the increase in the volume of the second cylinder 30B. As a result, the difference between the volume (inner volume) of the first cylinder 30A and the volume (inner volume) of the second cylinder 30B causes the contents to be discharged from the discharge hole 3a through the stem 10. That is, the inside of the first cylinder 30A and the inside of the second cylinder 30B are in a pressurized state as a whole.

[0068] Then, when the trigger lever 6 associated with the stem 10 returns from the state shown in FIG. 2 to its original position shown in FIG. 1, the contents inside the second cylinder 30B are pressurized, and the contents are discharged to the outside through the discharge hole through the stem 10.

[0069] When the stem 10 moves upward by biasing force from the state shown in FIG. 2, the space S1 below the first piston 40A becomes negative pressure, the valve body 33 separates upward from the valve seat 31d, and the contents in the container body 2 are sucked 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 cylinder 52 communicate, outside air is taken into the container body 2, and the negative pressure in the container body 2 is released.

[0070] By the way, after finishing pulling the trigger lever 6 and before releasing the hand and the trigger lever 6 starts to return to its original position, the supply of the contents from the second cylinder 30B to the stem 10 temporarily stops. However, the discharge head 20 communicating with the inside of the stem 10 is provided with a storage portion 100 for the contents, and the contents are stored in advance. That is, during the period from starting to pull the trigger lever 6 to finishing pulling the trigger lever 6, the contents supplied to the storage portion 100 through the inside of the stem 10 pressurize the storage portion 100.

[0071] Then, with the pressurization of the storage portion 100, the storage plunger 101 moves backward from the foremost position against the biasing force of the biasing member 102. Thereby, the contents can be stored (filled) in the storage portion 100. As the storage plunger 101 moves backward, the contents of the storage portion 100 with increased pressure can be guided to the discharge hole 3a through the supply hole 22a. Thereby, the contents can be discharged forward from the discharge hole 3a.

[0072] When the trigger lever 6 is fully pulled, although the supply of the content into the reservoir 100 through the stem 10 temporarily stops, as shown in FIG. 4, the biasing force of the biasing member 102 causes the reservoir plunger 101 to start moving forward toward the foremost position. As a result, the content accumulated in the reservoir 100 can be guided to the discharge hole 3a through the supply hole 22a, and the content can be continuously discharged forward through the discharge hole 3a.

[0073] Thus, according to the discharger 1 according to this embodiment, when operating the trigger lever 6, not only the content is discharged, but also after the trigger lever 6 is fully pulled and until the trigger lever 6 starts to return to its original position after the hand is released, and further, the content can also be discharged when the trigger lever 6 returns to its original position. Therefore, it is possible to increase the discharge amount of the content by one operation of the trigger lever 6 and enable a discharge that is less likely to be interrupted.

[0074] As described above, the dispenser 1 according to the present embodiment includes a stem 10 disposed at the mouth 2a of the container body 2 that houses the content, the stem 10 being movable downward in an upwardly biased state, a discharge head 20 in which a discharge hole 3a communicating with the inside of the stem 10 is formed, a trigger lever 6 linked to the discharge head 20, a first piston 40A provided on the stem 10, a second piston 40B provided at a position different from the first piston 40A in the vertical direction on the stem 10, a first cylinder 30A that slidably houses the first piston 40A up and down, a second cylinder 30B that is connected to the first cylinder 30A and whose interior communicates vertically with the interior of the first cylinder 30A and has a smaller inner diameter than the first cylinder 30A and slidably houses the second piston 40B up and down, a valve portion 80 that allows communication between a space S1 below the first piston 40A and a space S2 above the first piston 40A inside the first cylinder 30A when the stem 10 moves downward, and blocks communication between the space S1 below the first piston 40A and the space S2 above the first piston 40A inside the first cylinder 30A when the stem 10 moves upward, a storage portion 100 provided inside the discharge head 20 for storing the content that has passed through the stem 10, a storage plunger 101 movably disposed inside the storage portion 100 and moving toward the side opposite to the discharge hole 3a as the content is supplied to the storage portion 100, and a biasing member 102 that biases the storage plunger 101 toward the discharge hole 3a. According to this configuration, it is possible to increase the discharge amount of the content of the dispenser 1 by one operation of the trigger lever 6 and enable a discharge that is less likely to be interrupted.

[0075] Further, in the present embodiment, a supply hole 22a that communicates the discharge hole 3a with the inside of the stem 10 is formed in the discharge head 20, and the storage plunger 101 blocks communication with the discharge hole 3a through the stem 10 by closing the supply hole 22a at the foremost position on the discharge hole 3a side. According to this configuration, since the storage plunger 101 functions as a pressure accumulation valve, the pressure at which the content is discharged can be adjusted to a predetermined value, and the state of discharge of the content (such as the discharge pattern) can be maintained constant.

[0076] Note that 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.

[0077] In addition, within the scope not departing from the spirit of the present invention, it is possible to appropriately replace the components in the above-described embodiments with well-known components.

Explanation of Reference Numerals

[0078] 1 Ejector 2 Container body 2a Mouth part 3 Pump part 3a Discharge hole 4 Mounting cap 5 Support member 6 Trigger lever 10 Stem 11 Piston guide 11b Mouth part mounting part 12 Communication hole 13 Mounting groove 14 Rod part 20 Discharge head 22 Nozzle cylinder part 22a Supply hole 23 Shaft part 24 Cover member 25 Mandrel body 26 Nozzle tip 27 Storage cylinder 30 Cylinder 30A First cylinder 30B Second cylinder 31 Outer cylinder member 31a Upper cylinder part 31b Lower cylinder part 31c Connection cylinder part 31d Valve seat 31e Regulation projection 31f Support plate part 31g First air hole 32 Inner cylinder member 32a First cylinder forming part 32b Second cylinder forming part 32c Regulation part 32d flange part 32e erected cylinder part 32f second air hole 32g annular groove 33 valve body 34 coil spring 35 packing material 40A first piston 40B second piston 41A base part 41B connected cylinder part 42A sliding part 42B cylindrical sliding part 43A seal cylinder part 44A spring receiving part 50 seal member 51 surrounding cylinder part 51a opposing part 52 guide cylinder 54 inner hanging cylinder part 55 outer hanging cylinder part 56 side wall part 57 rear wall part 58 shaft body 59 reinforcing wall 61 top plate part 62 front plate part 63 side plate part 64 through hole 70 stopper 71 rotating shaft 72 main operation surface 73 operation side surface 74 regulating plate part 80 valve part 100 storage part 101 storage plunger 102 biasing member 111 upper cylinder member 112 lower cylinder member 112a fitting groove part 113 pipe attachment 114 pipe member O container axis S1 space S2 space

Claims

1. a stem disposed movably downward in an upwardly biased state at the mouth of a container body for containing a content, a discharge head formed with a discharge hole communicating with the inside of the stem, a trigger lever linked to the discharge head, a first piston provided on the stem, a second piston provided on the stem at a position different from the first piston in the vertical direction, a first cylinder for slidably accommodating the first piston vertically, a second cylinder connected to the first cylinder and having an interior vertically communicating with the interior of the first cylinder and a smaller inner diameter than the first cylinder, for slidably accommodating the second piston vertically, a valve portion that allows communication between the space below the first piston and the space above in the interior of the first cylinder when the stem moves downward, and blocks communication between the space below the first piston and the space above in the interior of the first cylinder when the stem moves upward, a storage portion provided in the discharge head for storing the content that has passed through the stem, a storage plunger movably disposed in the storage portion and moving toward the side opposite to the discharge hole as the content is supplied to the storage portion, and a biasing member for biasing the storage plunger toward the discharge hole. A dispenser.

2. A supply hole for communicating the discharge hole with the inside of the stem is formed in the discharge head, and the storage plunger blocks communication with the discharge hole through the stem by closing the supply hole at the foremost position on the discharge hole side. The dispenser according to Claim 1.

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