Discharger

Abstract

To provide a discharger of a two-stage cylinder accumulator type capable of re-engaging by a pressing operation even when shocks such as falling disengages a piston guide with a stem.SOLUTION: A discharger 2 comprises: a cylinder 2a; a piston 2b; an accumulator cylinder 2c; an accumulator piston 2d; a holding member 2e having an outlet 2e1, a stem 2e2, and a piston guide 2e3; an inner flow path 2f; a biasing part 2g; and an accumulator biasing part 2h. The piston guide 2e3 includes a rod 6, and the rod 6 has an engagement part 6a. A piston guide reception part 2c3 is provided. In a state where the piston guide 2e3 is received by the piston guide reception part 2c3, the holding member 2e is lowered with respect to the cylinder 2a by a pressing operation to re-engage the engagement part 6a with the stem 2e2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] A dispenser that is attached to the mouth of a container body and dispenses contents accommodated in the accommodation space of the container body, the dispenser comprising a holding member having a discharge port, a stem, and a piston guide, and an internal flow path that extends from the accommodation space to the discharge port via a pump chamber defined by a pressure accumulator cylinder, a pressure accumulator piston, the cylinder, and the piston, the piston guide having a fitting portion that is fitted into a seated portion and an inner peripheral surface of the stem to restrict upward and downward movement relative to the stem, the pressure accumulator piston rises relative to the seated portion against the biasing force of the pressure accumulator biasing portion due to the accumulation of pressure in the pump chamber, and A known dispenser has a seat that separates from the seat to open an internal flow path, and when the holding member is pressed down, the holding member, together with the accumulator piston, descends relative to a pressure accumulator cylinder that has a smaller cross-sectional area than the cylinder, and then descends relative to the cylinder, along with the accumulator cylinder and piston, thereby sending and discharging the contents from the pump chamber to the discharge port, and when the pressing operation is released, the holding member rises relative to the pressure accumulator cylinder, and then rises relative to the cylinder, along with the accumulator cylinder and piston, thereby sucking the contents from the storage space into the pump chamber (see, for example, Patent Document 1). A two-stage cylinder pressure accumulator dispenser with the above configuration can achieve a large discharge volume. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-143668 Summary of the Invention [Problem to be solved by the invention]

[0004] In the dispenser having the above-described configuration, the piston guide may become disengaged from the stem due to an impact such as being dropped.

[0005] Therefore, an object of the present invention is to provide a two-stage cylinder pressure accumulation type dispenser that can be re-engaged by pressing down the piston guide even if the piston guide becomes disengaged from the stem due to an impact such as being dropped. [Means for solving the problem]

[0006] One aspect of the present invention is as follows.

[0007] [1] A dispenser that is attached to the mouth of a container body having a mouth, a body, and a bottom, connected in this order, and that dispenses contents contained in a storage space of the container body, A cylinder; a piston that slides on the cylinder; an accumulator cylinder having a cross-sectional area smaller than that of the cylinder; an accumulator piston that slides on the accumulator cylinder; a holding member having a discharge port, a stem, and a piston guide; an internal flow path extending from the accommodation space to the discharge port via the pressure accumulator cylinder, the pressure accumulator piston, and a pump chamber defined by the cylinder and the piston; a biasing portion that generates a biasing force that raises the holding member relative to the cylinder; a pressure-accumulator biasing portion that generates a biasing force that moves the pressure-accumulator piston downward relative to the piston guide, the piston guide has a seated portion and a rod portion extending upward from the seated portion, the pressure accumulator piston has a seating portion that rises relative to the seated portion against the biasing force of the pressure-accumulation biasing portion due to the pressure accumulated in the pump chamber, and separates from the seated portion to open the internal flow path, the rod portion has a fitting portion that fits into an inner circumferential surface of the stem to restrict upward and downward movement of the rod portion relative to the stem, a discharger in which, by a pressing operation for pressing down the holding member, the holding member, together with the pressure accumulator piston, descends relative to the pressure accumulator cylinder, and then descends relative to the cylinder, together with the pressure accumulator cylinder and the piston, thereby sending and discharging the content from the pump chamber to the discharge port; and, by releasing the pressing operation, the holding member, after rising relative to the pressure accumulator cylinder, rises relative to the cylinder, together with the pressure accumulator cylinder and the piston, thereby sucking the content from the storage space into the pump chamber, a piston guide receiving portion that receives the piston guide, which descends relative to the stem when the fitting portion is disengaged, from below at a position that prevents the rod portion from slipping out of the pressure accumulator piston, With the piston guide received by the piston guide receiving portion, the holding member is lowered relative to the cylinder by the pressing operation, whereby the fitting portion of the rod portion is fitted again into the stem.

[0008] [2] The discharger according to [1], wherein the piston guide receiving portion is integrally provided with the pressure accumulator cylinder.

[0009] [3] the accumulator cylinder has a receiving portion that receives the accumulator piston from below when the fitting portion is fitted to the stem and the holding member and the accumulator piston are lowered relative to the accumulator cylinder by the pressing operation, the receiving portion has an annular upper surface that protrudes radially inward over the entire circumference on the inner circumferential surface of the pressure accumulator cylinder, The piston guide receiving portion is arranged in a circumferential direction at intervals to form a gap that serves as a flow path for the contents when the piston guide is received, and each of the piston guide receiving portions consists of a plurality of protrusions that protrude from the inner peripheral edge of the receiving portion. [1] The dispenser described in [2].

[0010] [4] The dispenser according to [1] or [2], wherein the piston guide receiving portion is a perforated wall that receives from below the lower end surface of the piston guide, which descends relative to the stem when the fitting portion is disengaged, at a position that prevents the rod portion from slipping out of the pressure accumulator piston, and has a plurality of through holes that become a flow path for the contents when the piston guide receiving portion receives the lower end surface of the piston guide, and is provided integrally with the pressure accumulator cylinder.

[0011] [5] the accumulator cylinder has a receiving portion that receives the accumulator piston from below when the fitting portion is fitted to the stem and the holding member and the accumulator piston are lowered relative to the accumulator cylinder by the pressing operation, the receiving portion has an annular upper surface that protrudes radially inward over the entire circumference on the inner circumferential surface of the pressure accumulator cylinder, The discharger according to [4], wherein the piston guide receiving portion is configured by a plurality of extending portions that extend radially in the radial direction of the pressure accumulator cylinder and are each integrally connected to the inner peripheral edge portion of the receiving portion. [Effects of the Invention]

[0012] According to the present invention, it is possible to provide a two-stage cylinder pressure accumulation type dispenser in which, even if the piston guide becomes disengaged from the stem due to an impact such as being dropped, it can be re-engaged by pressing down. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 2 is a vertical cross-sectional view showing a state before a pressing operation of the discharge container according to the embodiment of the present invention. [Figure 2] 2A is a longitudinal cross-sectional view of the accumulator cylinder shown in FIG. 1, and FIG. 2B is a cross-sectional view taken along the line BB in FIG. [Figure 3] 1. FIG. 2(a) is a side view of the piston guide shown in FIG. 1, and FIG. 2(b) is a cross-sectional view taken along CC in FIG. [Figure 4] FIG. 2 is an enlarged view of part A in FIG. [Figure 5] 5 is a cross-sectional view showing a state when a pressing operation is started from the state shown in FIG. 4. FIG. [Figure 6] 6 is a cross-sectional view showing a state when the pressing operation is completed from the state shown in FIG. 5. FIG. [Figure 7] 1. FIG. 4 is a cross-sectional view showing the state before the pushing operation when the piston guide is disengaged from the stem and the piston guide is lowered relative to the stem in the discharge container shown in FIG. [Figure 8] 8 is a cross-sectional view showing a state when a pressing operation is performed from the state shown in FIG. 7 and the piston reaches its lowest limit position. [Figure 9] FIG. 10 is a vertical cross-sectional view showing a state before a pushing operation of a discharge container according to another embodiment of the present invention. [Figure 10] 10 is a cross-sectional view showing a state when the pressing operation is completed from the state shown in FIG. 9. FIG. [Figure 11] 10(a) is a longitudinal sectional view of the accumulator cylinder shown in FIG. 9, and FIG. 10(b) is a DD sectional view of FIG. [Figure 12] 10(a) is a side view of the piston guide shown in FIG. 9, and (b) is an E-E cross-sectional view of (a). DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0015] As shown in FIG. 1 , in one embodiment of the present invention, a dispensing container 1 includes a dispenser 2 and a container body 3. The container body 3 includes a mouth 3a, a body 3b, and a bottom 3c, which are connected in this order, and defines an internal storage space S for storing contents 4. The dispenser 2 is attached to the mouth 3a of the container body 3 and dispenses the contents 4 stored in the storage space S of the container body 3 in response to operation. In this embodiment, the vertical direction is a direction along a central axis O passing through the center of the mouth 3a, the upward direction is a direction from the bottom 3c toward the mouth 3a along the vertical direction, and the downward direction is the opposite direction, the radial direction is a direction perpendicular to the central axis O, and the circumferential direction is a direction circumferential around the central axis O. The contents 4 are not particularly limited, and are a liquid in this embodiment.

[0016] As shown in Figures 1 to 4, the dispenser 2 includes a cylinder 2a, a piston 2b sliding on the cylinder 2a, a pressure-accumulating cylinder 2c having a cross-sectional area smaller than that of the cylinder 2a, a pressure-accumulating piston 2d sliding on the pressure-accumulating cylinder 2c, a holding member 2e having a discharge port 2e1, a stem 2e2, and a piston guide 2e3, an internal flow path 2f extending from the storage space S to the discharge port 2e1 via a pump chamber 2f1 defined by the pressure-accumulating cylinder 2c, the pressure-accumulating piston 2d, the cylinder 2a, and the piston 2b, a biasing portion 2g that generates a biasing force to raise the holding member 2e relative to the cylinder 2a, and a pressure-accumulating biasing portion 2h that generates a biasing force to lower the pressure-accumulating piston 2d relative to the piston guide 2e3. In this embodiment, the discharge port 2e1 discharges (sprays) the contents 4 in a mist form. However, the discharge port 2e1 is not limited to this configuration, and may be configured to discharge the contents 4 in a straight flow, for example.

[0017] The holding member 2e has a connecting portion 2e4 that connects the stem 2e2 to the accumulator cylinder 2c, and the connecting portion 2e4 holds the accumulator cylinder 2c on the stem 2e2 so that the accumulator cylinder 2c is movable up and down within a certain range. That is, the accumulator cylinder 2c is movable upward relative to the stem 2e2 until the upper end surface of the accumulator cylinder 2c abuts against the lower surface of the connecting portion 2e4 that connects the accumulator cylinder 2c to the stem 2e2, and is movable downward relative to the stem 2e2 until the locked portion 2c1 of the accumulator cylinder 2c abuts against the locking portion 2e5 of the connecting portion 2e4 in the up and down direction and is locked. In this embodiment, the locked portion 2c1 is formed by the lower surface of a circumferential groove provided on the outer peripheral surface of the accumulator cylinder 2c, and the locking portion 2e5 is formed by a plurality of protrusions that protrude radially inward, but the present invention is not limited to this.

[0018] The piston guide 2e3 has a seated portion 5a and a rod portion 6 extending upward from the seated portion 5a. The pressure-accumulating piston 2d has a seating portion 2d1 that rises relative to the seated portion 5a against the biasing force of the pressure-accumulation biasing portion 2h due to the accumulated pressure in the pump chamber 2f1, thereby separating from the seated portion 5a and opening the internal flow path 2f (see FIG. 5). The piston guide 2e3 also has a cylindrical portion 2d2 extending upward from the seating portion 2d1. The rod portion 6 has a fitting portion 6a that fits into the inner circumferential surface of the stem 2e2, thereby restricting upward and downward movement relative to the stem 2e2. As shown in FIG. 3, the fitting portion 6a is formed as a circumferential groove. The inner circumferential surface of the stem 2e2 has a plurality of ribs arranged circumferentially at intervals and extending vertically. Each rib has a protrusion 2e6 that protrudes radially inward and fits into the fitting portion 6a.

[0019] The accumulator piston 2d has a pressure accumulator sliding portion 2d3 that extends radially outward from the seating portion 2d1 and slides up and down on the accumulator cylinder 2c, and the cylindrical portion 2d2 of the accumulator piston 2d has an inner sliding portion 2d4 that slides up and down on the inner circumferential surface of the lower end portion of the stem 2e2 at the upper end portion of the cylindrical portion 2d2, and the accumulator piston 2d has an abutment portion 2d5 radially outward from the inner sliding portion 2d4, and is movable upward relative to the stem 2e2 and the piston guide 2e3 until the abutment portion 2d5 abuts against the lower end surface of the stem 2e2, and is movable downward relative to the stem 2e2 and the piston guide 2e3 until the seating portion 2d1 abuts against a seated portion 5a of the piston guide 2e3.

[0020] The stem 2e2 has an upper pressure accumulator spring receiving portion 2e7 on the outer peripheral surface of the stem 2e2 below the connecting portion of the connecting portion 2e4, which receives the upper end of the pressure accumulator biasing portion 2h, which is a compression spring that can expand and contract in the vertical direction. The pressure accumulator piston 2d has a lower pressure accumulator spring receiving portion 2d6 that receives the lower end of the pressure accumulator biasing portion 2h radially outward of the abutting portion 2d5.

[0021] The piston guide 2e3 has a rod-like shape extending in the vertical direction and has an expanded diameter portion 5 whose diameter expands downward, and the expanded diameter portion 5 has a seating portion 5a. The piston guide 2e3 also has a flange portion 5b at the lower end of the expanded diameter portion 5.

[0022] The discharger 2 includes a cylinder 2a, a mounting cap 2i, and a retaining member 2j. The cylinder 2a includes a cylindrical cylinder wall 2a1 centered on a central axis O, a flange 2a2 extending radially outward from the upper end of the cylinder wall 2a1, and a suction port 2a3 of a pump chamber 2f1. The piston 2b slides up and down on the cylinder wall 2a1. The mounting cap 2i includes an annular flange holder 2i1 centered on the central axis O and a retaining cylindrical portion 2i2 extending downward from the outer periphery of the flange holder 2i1 and retaining against the outer periphery of the port 3a with the flange 2a2 sandwiched between the flange holder 2i1 and the port 3a. The retaining member 2j is annular and surrounds the pressure accumulator cylinder 2c. It is attached to the upper end of the cylinder 2a and prevents the piston 2b from slipping out upward from the cylinder 2a.

[0023] The connecting portion 2e4 of the holding member 2e has an upper spring bearing portion 2e8 that receives the upper end of the biasing portion 2g, which is a compression spring that can expand and contract in the vertical direction. The retaining member 2j has a lower spring bearing portion 2j1 that receives the lower end of the biasing portion 2g.

[0024] The holding member 2e has a discharge port 2e1 and a push-down head 2e9 that is held at the upper end of the stem 2e2 so as to be movable in the up and down direction and that receives a push-down operation. In this embodiment, the push-down head 2e9 is a finger-type that receives a push-down operation with a finger, but is not limited to this. Note that the holding member 2e is not limited to a configuration that includes the push-down head 2e9.

[0025] The dispenser 2 has a forward and inverted unit 2k, which has a lower suction port 2k1 and an upper suction port 2k2 located above the lower suction port 2k1. When the discharge container 1 is in the upright position, the holding member 2e moves up and down to flow the contents 4 from the storage space S through the lower suction port 2k1 to the suction port 2a3 of the pump chamber 2f1. When the discharge container 1 is in the inverted position, the holding member 2e moves up and down to flow the contents 4 from the container body 3 through the upper suction port 2k2 to the suction port 2a3 of the pump chamber 2f1. The forward and inverted unit 2k allows the contents 4 to be dispensed in both the upright and inverted positions. Note that the forward and inverted unit 2k may not be provided.

[0026] The cylinder wall 2a1 of the cylinder 2a has an outside air inlet 2a4 that introduces outside air to replace the contents 4 into the storage space S as the contents 4 are discharged, and the dispenser 2 has an outside air introduction valve 2l attached to the outer peripheral surface of the cylinder wall 2a1. The outside air introduction valve 2l allows air to flow from the outside air introduction port 2a4 toward the storage space S while suppressing air flow in the opposite direction. The outside air introduction valve 2l can prevent the contents 4 from leaking out of the storage space S through the outside air introduction port 2a4 when discharging in an inverted position. Note that a configuration without the outside air introduction valve 2l is also possible.

[0027] The dispenser 2 has an overcap 2m ​​that exposes the press-down head 2e9 when removed from the mounting cap 2i, but this is not limiting.

[0028] The pressure-accumulation biasing portion 2h and the biasing portion 2g may be made of any material, and in this embodiment, they are made of metal. The piston guide 2e3, the stem 2e2, the pressure-accumulation piston 2d, and the pressure-accumulation cylinder 2c may be made of any material, and in this embodiment, they are made of resin.

[0029] In the dispenser 2, when the holding member 2e (push-down head 2e9) is depressed, the holding member 2e, together with the accumulator piston 2d, descends relative to the accumulator cylinder 2c as shown in FIGS. 4-5, and then descends relative to the cylinder 2a, together with the accumulator cylinder 2c and piston 2b, as shown in FIGS. 5-6, thereby sending and discharging the contents 4 from the pump chamber 2f1 to the discharge port 2e1. Furthermore, when the depression operation is released, the holding member 2e rises relative to the accumulator cylinder 2c, and then ascends relative to the cylinder 2a, together with the accumulator cylinder 2c and piston 2b, thereby sucking the contents 4 from the storage space S into the pump chamber 2f1. With the two-stage cylinder accumulator-type dispenser 2 configured as described above, the contents 4 can be forcefully discharged with a light operation by the accumulator cylinder 2c with a smaller cross-sectional area at the start of the depression operation. Thereafter, the contents 4 can be continued to be discharged with a light operation by the cylinder 2a with a larger cross-sectional area, maintaining the momentum of the depression operation. Therefore, a large discharge amount can be achieved while preventing the operating force from becoming excessive and the stroke of the cylinder 2a from becoming excessive.

[0030] As shown in Fig. 7, the dispenser 2 has a piston guide receiving portion 2c3 that receives the piston guide 2e3, which descends relative to the stem 2e2 when the engagement of the engagement portion 6a is released, from below at a position where the rod portion 6 does not come out of the pressure accumulator piston 2d, and as shown in Fig. 8, when the piston guide 2e3 is received by the piston guide receiving portion 2c3, the holding member 2e is lowered relative to the cylinder 2a by a pressing operation, and the engagement portion 6a of the rod portion 6 re-engages with the stem 2e2, resulting in the state shown in Fig. 6. In the illustrated example, the engagement portion 6a re-engages when the holding member 2e reaches the lower limit position.

[0031] The piston guide receiving portion 2c3 is provided integrally with the pressure accumulator cylinder 2c. Note that the piston guide receiving portion 2c3 is not limited to being provided integrally with the pressure accumulator cylinder 2c. For example, the configuration of the piston guide 2e3 (such as the vertical length of the piston guide 2e3) may be changed so that the suction valve element 2n provided at the suction port 2a3 of the cylinder 2a functions as the piston guide receiving portion 2c3. In this embodiment, the suction valve element 2n constitutes a ball valve, but is not limited to this. Any configuration may be adopted as long as the valve element allows the flow of the contents 4 from the suction port 2a3 to the pump chamber 2f1 while suppressing flow in the opposite direction.

[0032] The pressure accumulator cylinder 2c has a receiving portion 2c2 that receives the pressure accumulator piston 2d from below when the fitting portion 6a is fitted into the stem 2e2 and the holding member 2e and the pressure accumulator piston 2d are lowered relative to the pressure accumulator cylinder 2c by a pressing operation. Due to the receiving portion 2c2, when a pressing operation is continued after the pressure accumulator piston 2d is received by the receiving portion 2c2, even if the force of the pressing operation weakens, the force of the pressure accumulator biasing portion 2h presses down the piston 2b via the receiving portion 2c2, thereby maintaining the force of the discharge of the contents 4 and realizing stable discharge.

[0033] The receiving portion 2c2 has an annular upper surface that protrudes radially inward along the entire circumference on the inner circumferential surface of the pressure accumulator cylinder 2c. The pressure accumulator cylinder 2c has a fitting tube 2c5 that extends downward from the receiving portion 2c2 and is integrally connected to the receiving portion 2c2, and a fitted tube 2c6 that is integrally attached to the inner circumferential surface of the fitting tube 2c5 and is integrally connected to the piston 2b. The piston guide receiving portions 2c3 are arranged circumferentially at intervals to form gaps that serve as a flow path for the contents 4 when the piston guide 2e3 is received therein. Each of the piston guide receiving portions 2c3 consists of multiple (four in this embodiment) protrusions 2c4 that protrude radially inward and upward from the inner circumferential edge of the receiving portion 2c2. When the fitting portion 6a is disengaged, the upper surfaces of the protrusions 2c4 of the piston guide receiving portions 2c3 receive the lower surface of the flange portion 5b of the piston guide 2e3. The internal flow path 2f sends the contents 4 from the pump chamber 2f1 toward the discharge port 2e1 until the holding member 2e descends relative to the cylinder 2a by a pressing operation with the piston guide 2e3 received by the piston guide receiving portion 2c3 and reaches its lowest position.

[0034] According to the discharge container 1 of this embodiment, which has the piston guide receiving portion 2c3, even if the piston guide 2e3 becomes disengaged from the stem 2e2 due to an impact such as being dropped, it can be re-engaged by simply pressing it down, allowing it to continue to be used.

[0035] As in other embodiments shown in Figures 9 to 12, the piston guide receiving portion 2c3 is a perforated wall that receives from below the lower end surface of the piston guide 2e3, which descends relative to the stem 2e2 when the fitting portion 2c5 is disengaged, at a position where the rod portion 6 does not slip out of the pressure accumulator piston 2d, and has multiple (three in this embodiment) through holes 2c7 that become a flow path for the contents when the piston guide 2e3 is receiving the lower end surface, and may be configured to be integral with the pressure accumulator cylinder 2c.

[0036] In this embodiment, the pressure accumulator cylinder 2c has a receiving portion 2c2 similar to that of the previously described embodiment, and the piston guide receiving portion 2c3 is composed of multiple (three in this embodiment) extension portions 2c8 that extend radially in the radial direction of the pressure accumulator cylinder 2c and are each integrally connected to the inner peripheral edge portion of the receiving portion 2c2.

[0037] Even with this configuration, if the piston guide 2e3 becomes disengaged from the stem 2e2 due to an impact such as a drop, the piston guide 2e3 can be re-engaged by simply pressing it down, allowing continued use.

[0038] Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and the above-described embodiments can be modified in various ways without departing from the gist of the present invention. [Explanation of symbols]

[0039] 1 Discharge container 2 Dispenser 2a Cylinder 2a1 Cylinder wall 2a2 flange 2a3 Intake port 2a4 Outside air intake 2b piston 2c Accumulator cylinder 2c1 Locked part 2c2 Receiving part 2c3 Piston guide receiving part 2c4 protrusion 2c5 fitting tube 2c6 Mated tube 2c7 through hole 2c8 extension 2d Accumulator piston 2d1 Seating area 2d2 Cylindrical part 2d3 Accumulator sliding part 2d4 Inner sliding part 2d5 Contact part 2d6 Lower pressure accumulator spring support 2e Retaining member 2e1 Discharge port 2e2 stem 2e3 Piston Guide 2e4 connection 2e5 Locking part 2e6 Protrusion 2e7 Upper pressure storage spring support 2e8 Upper spring holder 2e9 Depressor Head 2f Internal flow path 2f1 Pump room 2g Force part 2h Accumulator energizing section 2i Mounting Cap 2i1 Flange holder 2i2 Locking cylinder part 2j Stopper 2j1 Lower spring holder 2k forward and inverted unit 2k1 Lower suction port 2k2 Upper suction port 2l fresh air intake valve 2m overcap 2n Suction valve body 3 Container body 3a Mouth 3b Torso 3c bottom 4 Contents 5 Expanded diameter part 5a Seated part 5b Flange part 6 Rod section 6a Fitting part O center axis S Storage space

Claims

1. A dispenser that is attached to the mouth of a container body having a mouth, a body, and a bottom, connected in this order, and that dispenses contents contained in a storage space of the container body, A cylinder; a piston that slides on the cylinder; an accumulator cylinder having a cross-sectional area smaller than that of the cylinder; an accumulator piston that slides on the accumulator cylinder; a holding member having a discharge port, a stem, and a piston guide; an internal flow path extending from the accommodation space to the discharge port via the pressure accumulator cylinder, the pressure accumulator piston, and a pump chamber defined by the cylinder and the piston; a biasing portion that generates a biasing force that raises the holding member relative to the cylinder; a pressure-accumulator biasing portion that generates a biasing force that moves the pressure-accumulator piston downward relative to the piston guide, the piston guide has a seated portion and a rod portion extending upward from the seated portion, the pressure accumulator piston has a seating portion that rises relative to the seated portion against the biasing force of the pressure-accumulation biasing portion due to the pressure accumulated in the pump chamber, and separates from the seated portion to open the internal flow path, the rod portion has a fitting portion that fits into an inner circumferential surface of the stem to restrict upward and downward movement of the rod portion relative to the stem, a discharger in which, by a pressing operation for pressing down the holding member, the holding member, together with the pressure accumulator piston, descends relative to the pressure accumulator cylinder, and then descends relative to the cylinder, together with the pressure accumulator cylinder and the piston, thereby sending and discharging the content from the pump chamber to the discharge port; and, by releasing the pressing operation, the holding member, after rising relative to the pressure accumulator cylinder, rises relative to the cylinder, together with the pressure accumulator cylinder and the piston, thereby sucking the content from the storage space into the pump chamber, a piston guide receiving portion that receives the piston guide, which descends relative to the stem when the fitting portion is disengaged, from below at a position that prevents the rod portion from slipping out of the pressure accumulator piston, With the piston guide received by the piston guide receiving portion, the holding member is lowered relative to the cylinder by the pressing operation, whereby the fitting portion of the rod portion is fitted again into the stem.

2. The dispenser according to claim 1 , wherein the piston guide receiving portion is provided integrally with the pressure accumulator cylinder.

3. the accumulator cylinder has a receiving portion that receives the accumulator piston from below when the fitting portion is fitted to the stem and the holding member and the accumulator piston are lowered relative to the accumulator cylinder by the pressing operation, the receiving portion has an annular upper surface that protrudes radially inward over the entire circumference on the inner circumferential surface of the pressure accumulator cylinder, 2. The dispenser according to claim 1, wherein the piston guide receiving portions are arranged in a circumferential direction at intervals to form gaps that serve as a flow path for the contents when the piston guide is received, and each of the piston guide receiving portions consists of a plurality of protrusions that protrude from the inner peripheral edge of the receiving portion.

4. 2. The dispenser according to claim 1, wherein the piston guide receiving portion is a perforated wall that receives from below the lower end surface of the piston guide, which descends relative to the stem when the fitting portion is disengaged, at a position that prevents the rod portion from slipping out of the pressure accumulator piston, and has a plurality of through holes that become a flow path for the contents when the piston guide receiving portion receives the lower end surface of the piston guide, and is provided integrally with the pressure accumulator cylinder.

5. the accumulator cylinder has a receiving portion that receives the accumulator piston from below when the fitting portion is fitted to the stem and the holding member and the accumulator piston are lowered relative to the accumulator cylinder by the pressing operation, the receiving portion has an annular upper surface that protrudes radially inward over the entire circumference on the inner circumferential surface of the pressure accumulator cylinder, The discharger according to claim 4, wherein the piston guide receiving portion is configured by a plurality of extending portions that extend radially in the radial direction of the pressure accumulator cylinder and are each integrally connected to an inner peripheral edge portion of the receiving portion.

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