Pressure-accumulating discharge device

Abstract

To provide a pressure accumulation type discharging tool which can prevent occurrence of liquid spill during operation while stabilizing mist quality of a liquid discharged from a nozzle.SOLUTION: A pressure accumulation type discharging tool 1, which is used in the state of being attached to a mouth 2a of a container body 2, has: a driver 50 that comprises a contacted part 51 which faces a contact part 22d provided on a piston 22 with a prescribed space below the contact part, is so located in a cylinder chamber 26 as to be vertically movable, and moves downward in such a manner that the contacted part 51 is pushed by the contact part 22d when the piston 22 has moved to a bottom dead point; and a push-up piece 54 that is so provided at a lower end of the driver 50 as to project downward, is located on a side of a ball valve 23, is elastically deformed radially inward along an inclined plane 21f provided on a bottom wall 21b when the driver 50 has moved downward, and contacts a side lower than a center position of the ball valve 23.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a pressure-accumulation type dispenser that is attached to the mouth of a container body when in use. [Background technology]

[0002] A commonly used discharge device that is attached to the mouth of a container body includes a cylinder with an inlet in the bottom wall, a piston with an outlet at its axis and slidably disposed inside the cylinder to define a cylinder chamber together with the cylinder, a ball valve disposed in the cylinder chamber to close the inlet, a flow path connected to the outlet and a nozzle attached to the tip of the flow path, a push-down body connected to the piston and movable up and down together with the piston, and a valve disposed in the flow path that blocks the flow path and activates to open the flow path when the pressure inside the flow path exceeds a predetermined value; when the push-down body is pushed down, the piston descends and the liquid in the cylinder chamber and flow path is pressurized to a predetermined pressure, which opens the valve and allows the liquid to be discharged from the nozzle in a pressurized state to the outside in a spray form.

[0003] Conventionally, such pressure-accumulation type discharge devices have generally been configured so that grooves or ribs are provided on the inner surface of the cylinder to release residual pressure in the cylinder chamber and flow path after discharging liquid, and when the piston moves to bottom dead center, the grooves or ribs release the seal on the piston, allowing the residual pressure in the cylinder chamber to be discharged into the inside of the container body through a discharge hole provided in the cylinder (see, for example, Patent Documents 1 and 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3957960 [Patent Document 1] Jikko No. 61-904 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the above-mentioned conventional pressure-accumulation type discharge device, the piston seal for isolating the cylinder chamber from the outside of the container is released by a groove or rib provided on the inner surface of the cylinder, so when the piston moves downward to pressurize the cylinder chamber, there is a problem in that the piston seal may suddenly be released, causing liquid to leak from the cylinder chamber.

[0006] In response to this problem, it is conceivable to use a configuration in which, without providing grooves or ribs on the inner peripheral surface of the cylinder, the valve is physically opened to release the residual pressure when the piston reaches bottom dead center. However, with this configuration, the residual pressure is discharged from the nozzle to the outside every time a liquid is discharged, which can result in large droplets of liquid being discharged at the end of the discharge, potentially degrading the mist quality of the discharged liquid.

[0007] The present invention has been made in consideration of such problems, and its purpose is to provide a pressure-accumulation type discharge device that can stabilize the mist quality of the liquid discharged from the nozzle while preventing liquid leakage during operation. [Means for solving the problem]

[0008] The pressure-accumulation type dispensing device of the present invention is a pressure-accumulation type dispensing device that is attached to the opening of a container body and is used, and includes a cylinder with an inlet on the bottom wall, a piston with an outlet at its axis and slidably disposed inside the cylinder to define a cylinder chamber together with the cylinder, a ball valve disposed in the cylinder chamber and closing the inlet, a flow path connected to the outlet and a nozzle attached to the tip of the flow path, and a push-down body connected to the piston and movable up and down together with the piston, and a push-down body disposed in the flow path that blocks the flow path and is activated when the pressure inside the flow path reaches or exceeds a predetermined value. The valve is characterized by having: a valve that opens the flow path; a driver that is provided with an abutted portion that faces an abutting portion provided on the piston with a predetermined gap therebelow, and is arranged to be freely movable in the vertical direction in the cylinder chamber, and when the piston moves to the bottom dead center, the abutted portion is pushed by the abutting portion and moves downward; and a push-up piece that is provided at the lower end of the driver so as to protrude downward, is arranged to the side of the ball valve, and is configured so that when the driver moves downward, it elastically deforms radially inward along an inclined surface provided on the bottom wall and abuts below the center position of the ball valve.

[0009] In the pressure-accumulation type discharge device of the present invention having the above-mentioned configuration, it is preferable that the driver includes a stopper that comes into contact with the bottom wall when the piston moves to the bottom dead center.

[0010] In the pressure-accumulation type discharge device of the present invention, in the above configuration, it is preferable that the bottom wall has a truncated cone shape whose diameter decreases downward, and that the inclined surface is provided in a recess formed on the inner peripheral surface of the bottom wall.

[0011] In the pressure-accumulation type discharge device of the present invention, in the above configuration, it is preferable that a plurality of retaining pieces, each having a smaller downward protrusion than the push-up piece, are arranged at the lower end of the drive body and spaced apart circumferentially from the push-up piece, and that the ball valve is arranged inside the push-up piece and the plurality of retaining pieces.

[0012] In the above-described configuration, the pressure-accumulation type discharge device of the present invention preferably has a trigger that presses the depressor downward. [Effects of the Invention]

[0013] According to the present invention, it is possible to provide a pressure-accumulation type discharge device that can stabilize the mist quality of the liquid discharged from the nozzle while preventing the occurrence of liquid leakage during operation. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a cross-sectional front view of a discharge container equipped with a pressure-accumulation type discharge device according to an embodiment of the present invention. [Figure 2] FIG. 2 is an enlarged cross-sectional view of a portion of the pressure-accumulation-type discharge device shown in FIG. 1 where a ball valve is provided. [Figure 3] FIG. 3 is a cross-sectional view of a lower end portion of the cylinder shown in FIG. 2. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Figure 5] 3 is a cross-sectional view of a lower end portion of the driver shown in FIG. 2. FIG. [Figure 6] FIG. 3 is a bottom view of the driver shown in FIG. 2. [Figure 7] 10 is a cross-sectional view showing a state in which the driver has moved downward and the lower end of the push-up piece has come into contact with the inclined surface. FIG. [Figure 8] 8 is a cross-sectional view showing a state in which the driver has moved further downward from the state shown in FIG. 7 and the push-up pieces have begun to elastically deform radially inward along the inclined surfaces. [Figure 9] 10 is a cross-sectional view showing the state of the lifting piece and the ball valve when the piston has moved to the bottom dead center. FIG. [Figure 10] 2 is a cross-sectional view of the pressure-accumulation-type discharge device shown in FIG. 1 when viewed from the front in a state in which liquid is being discharged. FIG. [Figure 11] 2 is a cross-sectional view of the pressure-accumulation-type discharge device shown in FIG. 1 in a state where the piston has moved to the bottom dead center, as viewed from the front. DETAILED DESCRIPTION OF THE INVENTION

[0015] A pressure-accumulation type discharge device 1 according to one embodiment of the present invention will be described in detail below with reference to the drawings.

[0016] In this specification and claims, the up-down direction refers to the up-down direction when the pressure-accumulation type discharge device 1 is in the upright position shown in Fig. 1. The radial direction refers to the direction along a straight line that passes through the central axis O and is perpendicular to the central axis O, and the circumferential direction refers to the circumferential direction centered on the central axis O.

[0017] As shown in Fig. 1, the pressure-accumulation type dispensing device 1 according to this embodiment is a so-called dispenser that is used by being attached to the opening 2a of the container body 2. The pressure-accumulation type dispensing device 1 and the container body 2 form a dispensing container 3. The pressure-accumulation type dispensing device 1 can dispense a predetermined amount of liquid 4 stored in the container body 2 and discharge it to the outside in a spray (mist) form.

[0018] The container body 2 is, for example, a bottle container made of synthetic resin, and the mouth portion 2a is cylindrical with the center being a central axis O. The container body 2 can store a liquid 4 therein as a content.

[0019] The pressure-accumulation type discharge device 1 includes an attachment part 10. In this embodiment, the attachment part 10 is configured in the shape of a cap, and is attached to the mouth part 2a of the container body 2 by screw connection. More specifically, the attachment part 10 is cylindrical with the central axis O as its center, and is configured to be attached to the outside of the mouth part 2a by screw connection. Note that the attachment part 10 may also be configured to be attached to the outside of the mouth part 2a by stoppering (undercut engagement).

[0020] The pressure-accumulation type discharge device 1 includes a pump 20. The pump 20 includes a cylinder 21, a piston 22, and a ball valve 23.

[0021] The cylinder 21 has a cylinder body 21a having a cylindrical outer shape centered on a central axis O, and a bottom wall 21b integrally connected to the lower end of the cylinder body 21a. A flange portion 21c is further provided integrally connected to the upper end of the cylinder body 21a, and the flange portion 21c is sandwiched between the attachment portion 10 and the upper end surface of the mouth portion 2a, thereby holding the cylinder 21 in a suspended state inside the container body 2. Reference numeral 24 denotes a seal member that liquid-tightly seals the gap between the upper end surface of the mouth portion 2a and the flange portion 21c.

[0022] Bottom wall 21b has a truncated cone shape whose diameter decreases downward, and at its axis is provided circular inlet 21d whose center is centered on central axis O. As shown in Fig. 2, an annular recess 21e whose center is on central axis O and recessed downward is formed on the inner peripheral surface (upward surface) of bottom wall 21b, and the bottom surface of recess 21e forms inclined surface 21f whose diameter decreases downward.

[0023] 1, a cylindrical body portion 21g having a cylindrical shape and centered on a central axis O is integrally provided on the upper surface of the flange portion 21c, and a cap 25 is fitted and fixed to the body portion 21g. The cap 25 has a cylindrical support body portion 25a having a cylindrical shape and centered on the central axis O.

[0024] Spring support portions 21h are integrally provided on the lower end side portion of the cylinder 21. More specifically, as shown in Figures 3 and 4, five plate-shaped spring support portions 21h are provided radially outside the recessed portion 21e and arranged at equal intervals in the circumferential direction, from the bottom wall 21b of the cylinder 21 to the inner surface of the cylinder body 21a.

[0025] As shown in FIG. 1, a tube 21i that is connected to the inlet 21d and extends to the bottom of the container body 2 is connected to the bottom wall 21b.

[0026] The piston 22 is cylindrical with an outlet 22a at its axis and is slidably disposed inside the cylinder 21. More specifically, the piston 22 has an annular piston body 22b with an outer diameter corresponding to the inner diameter of the cylinder 21, and a connecting cylinder portion 22c that is integrally connected to the piston body 22b and extends upward. The piston body 22b is slidably disposed inside the cylinder 21 and defines a cylinder chamber 26 together with the cylinder 21. The connecting cylinder portion 22c is disposed inside the support cylinder portion 25a and is supported by the support cylinder portion 25a so as to be vertically movably, and protrudes upward from the upper end of the support cylinder portion 25a.

[0027] A spring 27 is disposed between the lower end of the connecting cylindrical portion 22c of the piston 22 and the spring support portion 21h. The piston 22 is biased by the spring 27 and is held at the top dead center (the position shown in FIG. 1) where the piston body 22b abuts against the lower end of the support cylindrical portion 25a via a sealing material.

[0028] As shown in FIG. 2, ball valve 23 is spherical and has a larger diameter than inlet 21d, and is disposed inside cylinder chamber 26. Due to its own weight, ball valve 23 abuts against bottom wall 21b around inlet 21d over the entire circumference, thereby closing inlet 21d. Ball valve 23 is movable radially or upward from the position shown in FIG. 2. Ball valve 23 prevents liquid 4 from flowing out from cylinder chamber 26 through inlet 21d, and operates to move radially or upward when cylinder chamber 26 becomes negative pressure, opening inlet 21d and allowing liquid 4 from inside container body 2 to flow into cylinder chamber 26 through inlet 21d.

[0029] 1, a pusher 30 is connected to the piston 22. In this embodiment, the pusher 30 has a main body portion 31 and a stem portion 32.

[0030] The main body 31 is cylindrical and has a flow path 31a for the liquid 4 therein, and is disposed at an angle such that the tip is positioned slightly above the base end. A nozzle 33 connected to the flow path 31a is attached to the tip of the main body 31. The nozzle 33 has an outlet 33a, and the liquid 4 pumped from the flow path 31a can be discharged from the outlet 33a to the outside in a spray (mist) form.

[0031] The stem portion 32 is cylindrical and has a smaller diameter than the connecting cylinder portion 22c of the piston 22, with its center at the central axis O, and is integrally connected at its upper end to the main body portion 31. The interior of the stem portion 32 forms a flow path 32a for the liquid 4 that is connected to the flow path 31a of the main body portion 31. The lower end portion of the stem portion 32 is fitted and fixed to the connecting cylinder portion 22c of the piston 22. As a result, the push-down body 30 is connected to the piston 22 at the stem portion 32, and is movable vertically between a first position (the position shown in FIG. 1, where the piston 22 is at its top dead center) and a second position (the position shown in FIG. 11, where the piston 22 is at its bottom dead center) that is lower than the first position.

[0032] The main body 31 is provided with an annular valve seat 31b midway through the flow path 31a. A valve 34 is also disposed inside the main body 31. The valve 34 is cylindrical with a diameter smaller than that of the flow path 31a and is movable toward and away from the valve seat 31b. A housing 31c is provided at the base end of the main body 31. An isolation piston 35, which is provided at the base end of the valve 34, is slidably disposed in the housing 31c, and the opening on the base end side of the housing 31c is closed by a lid 36. A spring 37 is disposed between the isolation piston 35 and the lid 36. The valve 34 is biased toward the nozzle 33 by the spring 37. As a result, the seal portion 34a of the valve 34 abuts against the valve seat 31b, blocking the flow path 31a. Furthermore, when the pressure inside the flow path 31a reaches a predetermined value or higher, the isolation piston 35 compresses the spring 37 and moves in a direction away from the nozzle 33, which causes the seal portion 34a of the valve 34 to move away from the valve seat portion 31b, opening the flow path 31a.

[0033] The cap 25 has a pair of support walls 28 (only one of the support walls 28 is shown in FIG. 1). The pair of support walls 28 are plate-shaped and extend diagonally upward to the right from the cap 25 in FIG. 1, parallel to the central axis O. A connecting wall 29 is provided between the pair of support walls 28, and the pair of support walls 28 are connected to each other via the connecting wall 29.

[0034] In this embodiment, the pressure-accumulation type discharge device 1 has a trigger 40 that pushes the push-down body 30 downward, and is a so-called trigger type in which the pump 20 is actuated by pulling the trigger 40.

[0035] More specifically, trigger 40 has a dogleg shape, and one end thereof is rotatably (swingably) supported on support wall 28 by a rotation shaft 41. The other end of trigger 40 forms operating unit 42 that is pulled by the user. Operating unit 42 is located on the opposite side of central axis O from rotation shaft 41. Furthermore, trigger 40 is rotatably engaged with the outer circumferential surface of push-down body 30 by a rotation shaft 43 between rotation shaft 41 and operating unit 42.

[0036] As shown in FIG. 1, a driver 50 is disposed inside the cylinder chamber 26. The driver 50 is rod-shaped and centered on a central axis O. It is disposed in the cylinder chamber 26 so as to be vertically movable. The driver 50 includes a contact portion 51 configured as an upward surface. The contact portion 51 faces, with a predetermined distance therebelow, a contact portion 22d that protrudes radially inward from the inner circumferential surface of the connecting cylindrical portion 22c of the piston 22. The driver 50 also includes a guide shaft portion 52 that extends upward from the contact portion 51. The guide shaft portion 52 penetrates the axis of the contact portion 22d and is supported by the piston 22. The liquid 4 can flow through a gap between the inner circumferential surface of the contact portion 22d and the outer circumferential surface of the guide shaft portion 52. A locking portion 53 is integrally formed at the upper end of the guide shaft portion 52. Since the locking portion 53 is locked to the upper surface of the abutting portion 22d, when the piston 22 is at the top dead center (the position shown in FIG. 1), the driver 50 is held at a predetermined position where its lower end does not contact the bottom wall 21b. On the other hand, when the piston 22 moves to the bottom dead center, the abutted portion 51 is pushed by the abutting portion 22d, and the driver 50 moves downward from the position shown in FIG.

[0037] As shown in Fig. 2, a downwardly protruding push-up piece 54 is integrally provided at the lower end of the driver 50. More specifically, as shown in Figs. 2, 5, and 6, a hemispherical recess 55 slightly larger than the ball valve 23 is formed at the lower end of the driver 50, and an arc-shaped push-up piece 54 extending circumferentially is integrally provided radially outward of the recess 55.

[0038] When the piston 22 is at the top dead center and the push-down body 30 is in the first position, as shown in FIG. 2, the push-up piece 54 is positioned to the side of the ball valve 23, and its lower end is positioned above the inclined surface 21f at a distance from the inclined surface 21f that is smaller than the vertical distance between the first position and the second position.

[0039] From this state, when the piston 22 moves from the top dead center to near the bottom dead center, the driver 50 is pushed downward by the piston 22, and the lower end of the pushing-up piece 54 abuts against the inclined surface 21f provided on the bottom wall 21b on the side of the ball valve 23, as shown in Figure 7.

[0040] When the piston 22 moves further downward from the state shown in Figure 7, the driver 50 is pushed further downward by the piston 22, as shown in Figure 8, and the lower end of the push-up piece 54 moves radially inward along the inclined surface 21f provided on the bottom wall 21b on the side of the ball valve 23, thereby elastically deforming the push-up piece 54 radially inward.

[0041] 8, when the piston 22 moves further downward and reaches the bottom dead center, as shown in Fig. 9, the driver 50 is pushed further downward by the piston 22, and the push-up piece 54 elastically deforms further radially inward and abuts on a position below the center of the ball valve 23. As a result, the ball valve 23 is pushed radially outward and obliquely upward by the push-up piece 54, and is displaced from the inlet 21d, slightly opening the inlet 21d.

[0042] 5 and 6, a configuration may also be adopted in which a plurality of retaining pieces 56, each protruding less downward than the push-up piece 54, are provided at the lower end of the driver 50 and are spaced apart in the circumferential direction relative to the push-up piece 54. In this embodiment, three retaining pieces 56, each shaped like an arc and extending in the circumferential direction, are provided radially outside the recess 55 and are spaced apart in the circumferential direction relative to the push-up piece 54. The height at which the retaining pieces 56 protrude from the lower end of the driver 50 is such that the retaining pieces 56 do not come into contact with the inclined surface 21f when the piston 22 moves from the top dead center to the bottom dead center and the driver 50 is pushed downward by the piston 22.

[0043] When a configuration is adopted in which a plurality of holding pieces 56, each of which protrudes downward less than the push-up piece 54, are arranged at the lower end of the driver 50 at intervals in the circumferential direction relative to the push-up piece 54, the ball valve 23 is disposed inside the push-up piece 54 and the plurality of holding pieces 56, as shown in Fig. 2. In this case, the ball valve 23 is movable radially and upwardly within a predetermined range inside the push-up piece 54 and the plurality of holding pieces 56.

[0044] As shown in FIGS. 2, 5, and 6, the driver 50 may also be configured with stoppers 57 that abut against the bottom wall 21b when the piston 22 reaches the bottom dead center. In this embodiment, five stoppers 57 that protrude radially outward are integrally provided on the outer peripheral surface of the lower end of the driver 50 and are arranged at equal intervals in the circumferential direction. Each of the five stoppers 57 has a stopper surface 57a that is inclined to correspond to the inclination of the bottom wall 21b. When the piston 22 reaches the bottom dead center, as shown in FIG. 9, the stopper surfaces 57a abut against the bottom wall 21b, thereby restricting further downward movement of the driver 50. In other words, the bottom dead center of the driver 50 or the piston 22 is determined by the stopper surfaces 57a abutting against the bottom wall 21b.

[0045] As shown in FIG. 10 , in the pressure-accumulation-type discharge device 1 having the above configuration, when the user pulls the operating part 42 in a direction approaching the attachment part 10, the pusher 30 is driven by the trigger 40 and pushed downward from the first position (the position shown in FIG. 1 ). When the pusher 30 is pushed downward, the piston 22 moves downward together with the stem part 32, thereby pressurizing the cylinder chamber 26 and causing the pump 20 to perform a discharge operation. At this time, the ball valve 23 closes the inlet 21d. When the pump 20 performs a discharge operation, the liquid 4 sucked into the cylinder chamber 26 from inside the container body 2 is pressure-fed from the outlet 22a to the flow paths 32a and 31a. When the pressure of the liquid 4 pressure-fed to the flow paths 32a and 31a reaches a predetermined value or higher, the valve 34 opens, and the liquid 4 is pressure-fed from the flow path 31a to the nozzle 33 and discharged to the outside from the discharge port 33a in a spray (mist) form.

[0046] When the user further pulls operating unit 42 in the direction approaching mounting unit 10 from the state shown in Figure 10, push-down body 30 is pushed down to the second position, and piston 22 reaches its bottom dead center, as shown in Figure 11. When piston 22 reaches its bottom dead center, the pressure inside flow paths 31a, 31b and cylinder chamber 26 decreases as liquid 4 is discharged from discharge port 33a, and valve 34 closes.

[0047] At this time, as shown in Figure 9, when the piston 22 reaches the bottom dead center, the push-up piece 54 elastically deforms radially inward along the inclined surface 21f and abuts on a side below the center position of the ball valve 23, and the ball valve 23 is pushed radially outward and diagonally upward by the push-up piece 54, shifting it from the inlet 21d and leaving the inlet 21d slightly open.

[0048] Therefore, when the piston 22 reaches the bottom dead center and the valve 34 is closed, the residual pressure in the flow paths 31a, 31b and the cylinder chamber 26 is discharged into the container body 2 through the inlet 21d.

[0049] As described above, in the pressure-accumulation type discharge device 1 of this embodiment, the lower end of the driver 50 is provided with a push-up piece 54 that protrudes downward and is positioned to the side of the ball valve 23, and when the piston 22 reaches bottom dead center, the push-up piece 54 elastically deforms radially inward to move the ball valve 23 and open the inlet 21d, so that the piston 22 is always in liquid-tight contact with the inner circumferential surface of the cylinder 21, while preventing residual pressure from being generated within the flow paths 31a, 31b and the cylinder chamber 26. Therefore, when the pump 20 is operating to discharge the liquid 4, liquid leakage from the cylinder chamber 26 can be prevented.

[0050] Furthermore, in the pressure-accumulation type discharge device 1 of this embodiment, a push-up piece 54 is provided at the lower end of the driver 50, protruding downward and positioned to the side of the ball valve 23, and when the piston 22 reaches bottom dead center, the push-up piece 54 elastically deforms radially inward to move the ball valve 23 and open the inlet 21d, so there is no need to provide a configuration that physically opens the valve 34 to eliminate residual pressure when the piston 22 reaches bottom dead center. This prevents the liquid 4 from running out at the end of discharge and prevents a deterioration in the mist quality of the liquid 4 discharged from the discharge port 33a.

[0051] Furthermore, in the pressure-accumulation type discharge device 1 of this embodiment, the driver 50 is configured to include a stopper 57 that abuts against the bottom wall 21b when the piston 22 moves to the bottom dead center, so that the push-up piece 54 can be prevented from being excessively elastically deformed and breaking.

[0052] Furthermore, in the pressure-accumulation type discharge device 1 of this embodiment, the bottom wall 21b is formed in a truncated cone shape that narrows downward, and an inclined surface 21f is provided in the recess 21e formed on the inner peripheral surface of the bottom wall 21b, so that the push-up piece 54 is reliably guided by the inclined surface 21f and elastically deforms radially inward, thereby enabling the ball valve 23 to be reliably opened.

[0053] Furthermore, in the pressure-accumulation type discharge device 1 of this embodiment, a plurality of retaining pieces 56, which protrude downward less than the push-up piece 54, are arranged at the lower end of the drive body 50 at intervals in the circumferential direction relative to the push-up piece 54, and the ball valve 23 is arranged inside the push-up piece 54 and the plurality of retaining pieces 56, thereby preventing the ball valve 23 from moving excessively relative to the inlet 21d and allowing the ball valve 23 to operate reliably as a check valve.

[0054] The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit and scope of the present invention. [Explanation of symbols]

[0055] 1 Accumulator-type discharge device 2 Container body 2a Mouth 3 Discharge container 4 liquid 10. Mounting part 20 Pump 21 cylinders 21a Cylinder body 21b Bottom wall 21c Flange 21d Inlet 21e Recess 21f slope 21g cylinder part 21h Spring support 21i tube 22 Piston 22a Outlet 22b Piston body 22c Connecting cylinder part 22d Contact part 23 Ball valve 24 Sealing material 25 Cap 25a Support cylinder part 26 Cylinder chamber 27 Spring 28 Support wall section 29 Connecting wall 30 Push-down body 31 Main body 31a Flow path 31b Valve seat part 31c Storage section 32 Stem 32a Flow path 33 nozzle 33a Discharge port 34 Valve 34a Seal part 35 Isolation Piston 36 Lid 37 Spring 40 Trigger 41 Rotating shaft 42 Operation section 43 Rotating shaft 50 Driver 51 Abutted part 52 Guide shaft 53 Locking part 54 Push-up piece 55 recess 56 Holding piece 57 Stopper 57a Stopper surface O center axis

Claims

1. A pressure-accumulating type discharge device that is attached to the mouth of a container body and used, An attachment part attached to the mouth part; a cylinder having an inlet in a bottom wall and supported by the mounting portion; a piston having an outlet at its axis and slidably disposed inside the cylinder to define a cylinder chamber together with the cylinder; a ball valve disposed in the cylinder chamber and closing the inlet; a push-down body including a flow path connected to the outlet and a nozzle attached to a tip of the flow path, the push-down body being connected to the piston and being movable up and down together with the piston; a valve provided in the flow path, which blocks the flow path and operates to open the flow path when the pressure inside the flow path reaches a predetermined value or higher; a driver that includes an abutted portion that faces a contact portion provided on the piston with a predetermined gap therebelow, the driver being disposed in the cylinder chamber so as to be free to move vertically, and that moves downward when the piston reaches the bottom dead center by being pushed by the abutted portion; a push-up piece that is provided at the lower end of the driver and protrudes downward, is positioned to the side of the ball valve, and is configured to elastically deform radially inward along an inclined surface provided on the bottom wall when the driver moves downward, and to abut below the center position of the ball valve.

2. The pressure-accumulation type discharge device according to claim 1, wherein the driver includes a stopper that comes into contact with the bottom wall when the piston moves to the bottom dead center.

3. The pressure-accumulation type discharge device according to claim 1, wherein the bottom wall has a truncated cone shape that decreases in diameter downward, and the inclined surface is provided in a recess formed in the inner peripheral surface of the bottom wall.

4. a plurality of holding pieces, each having a smaller downward protrusion than the push-up piece, are provided at a lower end of the driver and are spaced apart from the push-up piece in a circumferential direction, The pressure-accumulation type discharge device according to claim 1 , wherein the ball valve is disposed inside the push-up piece and the plurality of holding pieces.

5. The pressure-accumulation type discharge device according to any one of claims 1 to 4, further comprising a trigger that pushes the push-down body downward.

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