Pump dispenser, discharge container, and discharge container containing contents

Abstract

A pump dispenser (3) is provided with: an inner rod (110) that is inserted through the inside of a hydraulic piston (104) provided in a cylinder (26) and reciprocates in accordance with the reciprocating motion of a nozzle (24), moves along the axis in accordance with the reciprocating motion of the nozzle (24), and has a first engagement section (166) at one end; and a cylindrical plunger (112) housed in the liquid chamber (220) and having a second engagement section (182) that defines the range of movement of the inner rod (110) by engaging with the first engagement section (166), the second engagement section (182) having an inclined guide surface (182a) and having formed therein an opening (182b) into which the first engagement section (166) is fitted. The first engagement portion (166) has an end portion (166a) having a diameter larger than that of the opening portion (182b), and a restricting portion (166b) that abuts the inner peripheral surface of the opening portion (182b) and restricts the relative inclination of the plunger (112) and the inner rod (110).

Description

Technical Field

[0001] The present invention relates to a pump dispenser, a spray container, and a spray container filled with a content. Background Art

[0002] Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 2021-160748, a pump dispenser for ejecting a liquid and a spray container using the pump dispenser have been known. When assembling such a pump dispenser, a hydraulic piston, an inner rod, a plug column, and a coil spring are unitized as part of a piston unit.

[0003] In recent years, in consideration of the global environment, it has been desired to reduce the amount of resin discharged as waste. As one of the means for this, attempts have been made to reduce the amount of resin used, such as thinning and lightening the resin container.

[0004] Here, the components for the pump dispenser are manufactured by molding resin, and for example, the inner rod is also made of resin. If the amount of resin usually used is reduced, the strength of the components tends to be impaired. Therefore, specifications are required such that even components with a reduced amount of resin do not cause any problems during manufacturing and use.

[0005] Prior Art Documents

[0006] Patent Documents

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2021-160748 Summary of the Invention

[0008] Problems to be Solved by the Invention

[0009] When assembling such a pump dispenser, it is preferable that the axis of the inner rod is parallel to the axis of the plug column, and it is particularly preferable to insert them at a position where the axes of the inner rod and the plug column coincide with each other.

[0010] However, due to the mechanical clearance between the inner rod and the plug column of the pump dispenser, and the positioning accuracy of the assembling device in the piston unit, etc., the axes of the inner rod and the plug column sometimes deviate from each other. Due to this deviation, the inner rod tilts with respect to the axis of the plug column while being inserted.

[0011] If this tilt becomes large, the shaft body of the inner rod deforms, and sometimes it cannot be fitted with the plug column without applying an appropriate fitting force to the inner rod. In components with a reduced amount of resin used, since there is a greater possibility of deformation, a mechanism for suppressing tilt when the inner rod is inserted into the plug column is required.

[0012] Therefore, an object of the present invention is to provide a pump dispenser, a spray container, and a spray container filled with a content that can suppress the relative tilt of the inner rod and the plug column during assembly.

[0013] Solution to the problem

[0014] According to one aspect of the present invention, a pump dispenser includes: a nozzle; a cylinder body; a hydraulic piston disposed in the cylinder body and reciprocating as the nozzle reciprocates; an inner rod inserted inside the hydraulic piston and moving along the axis as the nozzle reciprocates, having a first engaging portion at one end; and a cylindrical plug column housed in a liquid chamber formed by the hydraulic piston and the cylinder body, into which the inner rod is inserted, and having a second engaging portion that defines a moving range of the inner rod moving relative to the cylinder body by engaging with the first engaging portion. The second engaging portion has a guiding surface that guides the first engaging portion and is inclined relative to the axis of the plug column, and an opening portion into which the first engaging portion is fitted is formed on the guiding surface. The first engaging portion has: an end portion formed to have a diameter larger than that of the opening portion; and a restricting portion provided at the end portion to restrict relative inclination of the plug column and the inner rod by abutting against the inner peripheral surface of the opening portion.

[0015] Advantageous effects of the invention

[0016] According to the present invention, it is possible to provide a pump dispenser, a spray container, and a spray container filled with a content that can suppress relative inclination of an inner rod and a plug column during assembly. Description of the drawings

[0017] Figure 1 It is a cross-sectional view showing the structure of a spray container according to an embodiment of the present invention.

[0018] Figure 2 It is a cross-sectional view showing the structure of an inner rod used in the pump dispenser of the spray container.

[0019] Figure 3 It is a cross-sectional view showing the main part structure of the inner rod.

[0020] Figure 4 It is a bottom view showing the main part structure of the inner rod.

[0021] Figure 5 It is a cross-sectional view showing the structure of a plug column used in the pump dispenser.

[0022] Figure 6 It is a cross-sectional view showing an enlarged main part structure of the plug column.

[0023] Figure 7 It is an explanatory view showing the structures of the inner rod and the plug column of the embodiment and the comparative example arranged side by side.

[0024] Figure 8 It is an explanatory view showing an example of the operation when the inner rod and the plug column are fitted together.

[0025] Figure 9 It is a bottom view showing the main part structure of the inner rod representing other embodiments of the present invention.

[0026] Figure 10 It is a bottom view showing the main part structure of the inner rod representing other embodiments of the present invention. Detailed implementation mode

[0027] Hereinafter, use Figures 1 to 8 to illustrate the structure of the ejection container 1 of an embodiment of the present invention.

[0028] Figure 1 It is a cross-sectional view showing the structure of the ejection container 1 of an embodiment of the present invention. Figure 2 It is a cross-sectional view showing the structure of the inner rod 110 used in the pump dispenser 3 of the ejection container 1. Figure 3 It is a cross-sectional view showing the structure of the first engaging portion 166 of the inner rod 110, Figure 4 It is a bottom view showing the structure of the first engaging portion 166 of the inner rod 110. Figure 5 It is a cross-sectional view showing the structure of the plug column 112 for the pump dispenser 3. Figure 6 It is a cross-sectional view showing the structure of the second engaging portion 182 of the plug column 112. Figure 7 It is an explanatory view showing the structures of the inner rod 110 and the plug column 112 of the embodiment and the comparative example arranged. Figure 8 It is an explanatory view showing an example of the operation of the inner rod 110 when the inner rod 110 is engaged with the plug column 112 in the assembly process of the pump dispenser 3.

[0029] As Figure 1 shown, the ejection container 1 includes a container body 2, a pump dispenser 3, a tube body 4, and a cap 5. In addition, Figure 1 the ejection container 1 shown is an ejection container filled with a content, and stores a liquid 400 as the content.

[0030] The ejection container 1 is a so-called manual pump that sucks up the liquid 400 stored in the container body 2 by the pump dispenser 3 and ejects the liquid 400 as a foam, for example. In the present embodiment, the container body 2 of the ejection container 1 is set to the lower side, and the pump dispenser 3 is set to the upper side, and the vertical direction is defined, and the following description will be made.

[0031] The liquid 400 is the content stored in the container body 2. The liquid 400 is cosmetics, detergents, pharmaceuticals, products with mild pharmacological effects, foods, etc. As specific examples, liquids containing surfactants such as shampoo, hand soap, facial cleanser, and shaving cream can be cited.

[0032] The container body 2 is, for example, a bottomed cylindrical shape such as a bottomed tubular shape. The container body 2 can store the liquid 400 inside it. The container body 2 is formed of a resin material, a metal material, glass, pottery, or the like. The container body 2 includes a main body 12 for storing the liquid 400 and a fixing portion 14 having an opening portion where a part of the upper end of the main body 12 protrudes and opens. The fixing portion 14 has an external thread portion 14a on its outer peripheral surface.

[0033] As Figure 1 shown, the pump dispenser 3 includes a support portion 22, a nozzle 24, a cylinder body 26, a piston unit 28, and a spherical valve element 30.

[0034] The support portion 22 includes, for example, a cylindrical nozzle guide cylinder 32 and a fixed portion 34 that is formed in a cylindrical shape with a diameter larger than that of the nozzle guide cylinder 32 and is fixed to the fixing portion 14 of the container body 2. The support portion 22 is formed in a double-cylindrical shape, for example, by the nozzle guide cylinder 32 extending from an opening at one end of the fixed portion 34 into the inside of the fixed portion 34. The nozzle guide cylinder 32 and the fixed portion 34 are integrally formed of a resin material, for example. The nozzle guide cylinder 32 and the fixed portion 34 are coaxially arranged, for example.

[0035] The nozzle guide cylinder 32 guides the nozzle 24 in the vertical direction. In other words, the nozzle 24 can be guided to move along the axis of the nozzle guide cylinder 32.

[0036] The fixed portion 34 is gradually reduced in diameter to a curved surface shape on the upper end side, for example. The fixed portion 34 has an internal thread portion 34a formed on its inner peripheral surface and a fitting portion 34b formed on its outer peripheral surface. The internal thread portion 34a is screwed with the external thread portion 14a of the container body 2. Thus, the container body 2 and the pump dispenser 3 can be detachably formed. The fitting portion 34b is formed to be able to be fitted with the lid 5.

[0037] The nozzle 24 is disposed above the support portion 22. The nozzle 24 has an inner cylinder 42, an outer cylinder 44 with a diameter larger than that of the inner cylinder 42, a spray cylinder 46 that is fluidly continuous with the inner cylinder 42, and a mesh filter 48 provided on the inner cylinder 42 and / or the spray cylinder 46. The inner cylinder 42, the outer cylinder 44, and the spray cylinder 46 are integrally formed of a resin material, for example. The outer diameter of the outer cylinder 44 is formed to be smaller than the inner diameter of the nozzle guide cylinder 32.

[0038] The inner cylinder 42 and the spray cylinder 46 together form a fluid flow path 24a. The inner cylinder 42 and the outer cylinder 44 are coaxially arranged, for example.

[0039] A part of the lower end side of the outer cylinder 44 is disposed inside the nozzle guide cylinder 32 and is formed to be able to reciprocate in one direction within the nozzle guide cylinder 32. The outer cylinder 44 reciprocates between a first position (normal position) and a second position (pressed position) different from the first position along the axis of the nozzle guide cylinder 32 with respect to the support portion 22.

[0040] The ejection cylinder 46 protrudes from the upper end of the inner cylinder 42 in a direction intersecting the axis of the inner cylinder 42, for example, laterally and upward.

[0041] When the mesh filter 48 allows the liquid 400 and gas passing through the flow path 24a to pass through, high-quality bubbly liquid 400 is generated. The mesh filter 48 is supported, for example, inside the inner cylinder 42. The mesh filter 48 has a cylindrical main body portion 48a and two meshes 48b, 48c separated from the main body portion 48a. For example, the two meshes 48b, 48c are fixed to both ends of the main body portion 48a.

[0042] The cylinder block 26 is supported below the support portion 22. The cylinder block 26 is cylindrical. The cylinder block 26 includes a first cylinder (pneumatic cylinder block) 52, a second cylinder (hydraulic cylinder block) 54 having an inner peripheral surface with a diameter smaller than the inner peripheral surface of the first cylinder 52, and a mounting cylinder 56 having an inner peripheral surface with a diameter smaller than the inner peripheral surface of the second cylinder 54 and to which the pipe body 4 is mounted. The first cylinder 52, the second cylinder 54, and the mounting cylinder 56 are integrally formed of a resin material, for example. The first cylinder 52, the second cylinder 54, and the mounting cylinder 56 are coaxially arranged and are also coaxially arranged with the support portion 22.

[0043] The first cylinder 52 has: a first slidable portion 62 for the pneumatic piston 102 (to be described later) of the piston unit 28 to slide; a fixed end 64 supported between the outer peripheral surface of the nozzle guide cylinder 32 of the support portion 22 and the inner peripheral surface of the fixed portion 34; and a first annular portion 66 that makes the lower end of the first cylinder 52 and the second cylinder 54 continuous. The first slidable portion 62 has a constant inner diameter, for example. In addition, a through hole 62b is formed in the first slidable portion 62. The through hole 62b is blocked by the pneumatic piston 102 in the first position and is separated from the pneumatic piston 102 in the second position, and communicates the inside of the first cylinder 52 and the inside of the container body 2.

[0044] The fixed end 64 is continuously provided with the first slidable portion 62 at the upper end of the first slidable portion 62. The fixed end 64 is fitted, for example, between the outer peripheral surface of the nozzle guide cylinder 32 of the support portion 22 and the inner peripheral surface of the fixed portion 34, and is supported via a seal 64a at the upper end of the fixed portion 14 of the container body 2. The first annular portion 66 is provided below the first slidable portion 62. The outer peripheral edge of the first annular portion 66 is continuously integrated with the first slidable portion 62, and is open at the central side, and is continuously integrated with the second cylinder 54 at the central side. For example, the first annular portion 66 is inclined with respect to the axis such that the opening from the outer peripheral edge side toward the center side is downward on the outer peripheral edge side and upward on the center side.

[0045] The second cylinder 54 has a second slidable portion 72 for the hydraulic piston 104 (to be described later) of the piston unit 28 to slide, a plug post seat portion 74 for supporting the plug post 112 (to be described later) of the piston unit 28, and a second annular portion 76 that makes the second cylinder 54 and the mounting cylinder 56 continuous.

[0046] The second slidable portion 72 has, for example, a constant inner diameter. The plug column seat portion 74 has a seat surface 74a extending in a direction orthogonal to the axis of the second cylinder 54. The seat surface 74a supports the plug column 112 on the upper surface. The second annular portion 76 has a valve seat 76a for the spherical valve element 30. The valve seat 76a annularly abuts against a part of the outer peripheral surface of the spherical valve element 30.

[0047] The piston unit 28 is supported by the nozzle 24 and is disposed within the support portion 22, the nozzle 24, and the cylinder block 26. The piston unit 28 includes a pneumatic piston 102, a hydraulic piston 104, an air chamber valve element 106, an inner rod (rod-shaped valve element) 110, a plug column 112, and a biasing member 114.

[0048] The pneumatic piston 102 and the hydraulic piston 104 are coaxially arranged. The pneumatic piston 102 has an annular main body portion 122, a holding portion 124 for holding the air chamber valve element 106, a cylindrical first fitting cylinder 126 that fits with the hydraulic piston 104, and a cylindrical second fitting cylinder 128 that fits with the nozzle 24. The main body portion 122, the holding portion 124, the first fitting cylinder 126, and the second fitting cylinder 128 are integrally formed of, for example, a resin material. In addition, one or more through holes 102a that penetrate the pneumatic piston 102 in the vertical direction are formed in a part between the main body portion 122 and the holding portion 124 of the pneumatic piston 102.

[0049] When the pneumatic piston 102 moves in the vertical direction (axial direction), the main body portion 122 slides on the inner peripheral surface of the first slidable portion 62 of the cylinder block 26. The outer diameter of at least a part of the main body portion 122, for example, the outer diameters of the upper end and the lower end of the main body portion 122, are formed to have the same diameter as or slightly larger than the inner diameter of the inner peripheral surface of the first slidable portion 62 of the cylinder block 26, and elastically deform when contacting the first slidable portion 62 of the cylinder block 26, and can slide while maintaining contact with the inner peripheral surface of the first slidable portion 62 of the cylinder block 26.

[0050] The holding portion 124 is provided at a position radially inward of the main body portion 122. The holding portion 124 is formed, for example, in a double cylindrical shape with a diameter smaller than the inner diameter of the main body portion 122, and the air chamber valve element 106 is held by being fitted between the inner cylinder and the outer cylinder.

[0051] The diameter of the first fitting cylinder 126 is smaller than the inner diameter of the inner cylinder of the holding portion 124. The first fitting cylinder 126 is fitted to the upper end portion of the hydraulic piston 104. The upper end of the hydraulic piston 104 and the upper end of the inner rod 110 are disposed inside the first fitting cylinder 126. The first fitting cylinder 126 and the upper end of the hydraulic piston 104 together form a mixing chamber 136 for a mixture of air and a liquid 400 inside. That is, on the secondary side of the pneumatic piston 102 and the secondary side of the hydraulic piston 104, a mixing chamber 136 is formed in which the air conveyed by the pneumatic piston 102 and the liquid 400 conveyed by the hydraulic piston 104 are mixed. The mixing chamber 136 communicates with the flow path 24a of the nozzle 24. Further, an opening 138 that communicates the mixing chamber 136 and the flow path 24a of the nozzle 24 is formed above the mixing chamber 136 of the first fitting cylinder 126.

[0052] The inner surface 136a of the mixing chamber 136 inside the first fitting cylinder 126 has an inclined surface or a rib or the like that can press the valve element 164 of the inner rod 110. The inclined surface or rib of the mixing chamber 136 is inclined such that the inner diameter or width decreases from the side of the hydraulic piston 104 toward the flow path 24a of the nozzle 24.

[0053] The second fitting cylinder 128 is fitted to, for example, the inner peripheral surface of the inner cylinder 42 of the nozzle 24. Accordingly, the pneumatic piston 102 moves as the nozzle 24 moves.

[0054] The air chamber valve element 106 is formed in a ring shape and is made of a resin material having a higher flexibility than the pneumatic piston 102. The air chamber valve element 106 has, at a position below the holding portion 124: a cylindrical portion 140 held by the holding portion 124; and an outer ring-shaped valve element 142 and an inner ring-shaped valve element 144 integrally formed with the lower end of the cylindrical portion 140.

[0055] The cylindrical portion 140 is fitted into the gap between the outer cylinder and the inner cylinder of the holding portion 124. The outer ring-shaped valve element 142 is formed in a ring shape extending radially outward from the lower end of the cylindrical portion 140. The outer ring-shaped valve element 142 opens and closes the through hole 102a that is the flow path of the air for the pneumatic piston 102. The inner ring-shaped valve element 144 is formed in a ring shape extending radially inward from the lower end side of the cylindrical portion 140. The inner ring-shaped valve element 144 opens and closes the flow path of the air between the hydraulic piston 104 and the first fitting cylinder 126. The outer ring-shaped valve element 142 and the inner ring-shaped valve element 144 elastically deform due to a change in air pressure accompanying the movement of the nozzle 24 and open and close the flow path of the air.

[0056] The hydraulic piston 104 is fitted to the first fitting cylinder 126 inside the pneumatic piston 102. The hydraulic piston 104, the first cylinder 52 of the cylinder block 26, and the pneumatic piston 102 together form an air chamber 210. In addition, the hydraulic piston 104 and the second cylinder 54 of the cylinder block 26 together form a liquid chamber 220. The hydraulic piston 104 reciprocates together with the pneumatic piston 102 as the nozzle 24 reciprocates, thereby changing the volumes of the air chamber 210 and the liquid chamber 220.

[0057] The hydraulic piston 104 has a cylindrical body 152, a valve seat 154, a support seat 156 that supports the upper end of the biasing member 114, and a flange 158 that extends radially outward from the cylindrical body 152. The cylindrical body 152, the valve seat 154, the support seat 156, and the flange 158 are integrally formed of, for example, a resin material.

[0058] The upper end portion of the cylindrical body 152 is fitted to the first fitting cylinder 126 of the pneumatic piston 102. On the outer peripheral surface of the upper end portion of the cylindrical body 152, a plurality of ribs 152a that extend in the axial direction and protrude radially outward are provided. The ribs 152a are provided between the upper end of the cylindrical body 152 and the flange 158. The ribs 152a are preferably formed at regular intervals in the circumferential direction on the outer peripheral surface of the upper end portion of the cylindrical body 152. Between the ribs 152a adjacent in the circumferential direction, in a state where the upper end portion of the cylindrical body 152 of the hydraulic piston 104 is fitted to the first fitting cylinder 126 of the pneumatic piston 102, an air passage that allows air to flow is formed between the outer peripheral surface of the cylindrical body 152 of the hydraulic piston 104 and the first fitting cylinder 126 of the pneumatic piston 102.

[0059] The outer diameter of the lower end portion of the cylindrical body 152 of the hydraulic piston 104 that is below the flange 158 is the same as the inner diameter of the second slidable portion 72 of the second cylinder 54 of the cylinder block 26, or slightly larger than the inner diameter of the second slidable portion 72. Therefore, the cylindrical body 152 of the hydraulic piston 104 slides on the inner peripheral surface of the second slidable portion 72 of the second cylinder 54 of the cylinder block 26 while sealing the liquid chamber 220.

[0060] The valve seat 154 is provided on the inner peripheral surface of the upper end of the cylindrical body 152. The valve seat 154 is formed in a ring shape.

[0061] The support seat 156 is a circular ring-shaped seat surface that extends in a direction orthogonal to the axial direction. The support seat 156 supports the upper end of the biasing member 114. The support seat 156 is provided inside the hydraulic piston 104. For example, the support seat 156 is provided at the same position as the flange 158 in the axial direction.

[0062] The flange 158 has, for example, a notch 158a opened and closed by the inner annular valve element 144. By opening the inner annular valve element 144, the notch 158a makes the air passage between the air chamber 210 and the outer peripheral surface of the cylindrical body 152 of the hydraulic piston 104 and the first fitting cylinder 126 of the pneumatic piston 102 continuous.

[0063] As Figure 2 shown, the inner rod 110 has a shaft body (rod portion) 162, a valve element 164 provided at the upper end of the shaft body 162, and a first engaging portion 166 provided at the lower end of the shaft body 162. The shaft body 162, the valve element 164, and the first engaging portion 166 are coaxially arranged. In addition, the shaft body 162, the valve element 164, and the first engaging portion 166 are integrally formed of a resin material.

[0064] The outer diameter of the shaft body 162 is formed to be smaller than the inner diameter of the hydraulic piston 104. The shaft body 162 has, for example, a first shaft portion 172, a second shaft portion 174, and a shaft diameter changing portion 176. The first shaft portion 172 of the shaft body 162 is continuous with the valve element 164. The second shaft portion 174 of the shaft body 162 is continuous with the first engaging portion 166. The first shaft portion 172 and the second shaft portion 174 are formed in a cylindrical shape. The cross-sectional area of the first shaft portion 172 of the shaft body 162 that is orthogonal to the coaxial center and continuous with the valve element 164 is larger than the cross-sectional area of the second shaft portion 174 that is continuous with the first engaging portion 166. The shaft diameter changing portion 176 where the cross-sectional area changes between the first shaft portion 172 and the second shaft portion 174 of the shaft body 162 is formed in a conical shape. The region where the diameter of the shaft body 162 changes may also be formed in a step. In addition, the second shaft portion 174 may also have a flange or rib or the like as a reinforcing portion that extends in the axial direction and protrudes in the radial direction.

[0065] The valve element 164 is formed as a lift valve, for example. The longitudinal section of the valve element 164 including the axis is formed in a substantially triangular pyramid shape or a substantially V-shaped shape having an inclined surface. The valve element 164 can contact and separate from the valve seat 154 of the hydraulic piston 104.

[0066] The first engaging portion 166 has a larger cross-sectional area orthogonal to the axis than the second shaft portion 174 of the shaft body 162. The first engaging portion 166 has, for example, an end portion 166a continuous with the second shaft portion 174 and a restricting portion 166b formed on the end side of the end portion 166a. The end portion 166a is formed in a hemispherical shape or a dome shape and has a curved surface portion on the end side.

[0067] As a specific example, as Figure 3 and Figure 4 shown, the portion of the end portion 166a that is continuous with the second shaft portion 174 is formed in a cylindrical shape, and the portion on the end side opposite to the second shaft portion 174 is formed in a dome shape formed by a curved surface with a specified radius of curvature. In Figure 3In this case, the outer peripheral surface of the cylindrical portion of the end portion 166a is denoted as 166a1, and the dome-shaped curved surface of the end-side portion is denoted as 166a2. In Figure 3 this case, the curved surface 166a2 of the end portion 166a is represented by a solid line, and the imaginary curved surface that extends this curved surface 166a2 is represented by a double-dashed line.

[0068] As Figure 3 and Figure 4 shown, the restricting portion 166b is integrally formed with the end portion 166a on the central side of the end of the end portion 166a. The restricting portion 166b is a protrusion that integrally protrudes from the dome-shaped curved surface of the end portion 166a. For example, the end surface of the restricting portion 166b is set to be the same as the end surface of the end portion 166a. The axis of the restricting portion 166b is coaxially arranged with the axis of the end portion 166a. The width orthogonal to the axial direction of the restricting portion 166b, that is, the outer diameter of the restricting portion 166b, is smaller than the maximum outer diameter of the end portion 166a. Here, the maximum outer diameter of the end portion 166a refers to the outer diameter of the outer peripheral surface 166a1 of the cylindrical portion of the end portion 166a. As a specific example, as Figure 3 and Figure 4 shown, the restricting portion 166b is formed in a cylindrical shape, for example, and the outer diameter is formed to be a diameter smaller than the maximum outer diameter of the end portion 166a.

[0069] As Figure 5 shown, the plug column 112 has a cylindrical main body portion 180, a circular opening, that is, a second engaging portion 182, formed on the inner peripheral surface at the upper end of the main body portion 180, and a flange portion 184 formed at the lower end. The main body portion 180, the second engaging portion 182, and the flange portion 184 are coaxially arranged.

[0070] A plurality of openings 186 are formed on the lower end side of the main body portion 180, and the openings 186 serve as liquid passages that communicate the inside and outside of the plug column 112. The openings 186 are formed in a rectangular shape extending along the axial direction. The inner diameter of the main body portion 180 is larger than the inner diameter of the second engaging portion 182.

[0071] The second engaging portion 182 is a portion with an annular opening that is provided at the upper end of the main body portion 180, into which the first engaging portion 166 of the inner rod 110 is inserted, and that engages with the first engaging portion 166 in the direction in which the inner rod 110 and the plug column 112 move away from each other in the axial direction.

[0072] As Figure 6As shown, the second engaging portion 182 has a guiding surface 182a that guides the first engaging portion 166 when the first engaging portion 166 at the thinner end of the inner rod 110 is engaged with the plug 112, and a circular opening 182b is formed at the center of the guiding surface 182a. In other words, the second engaging portion 182 is constituted by forming a frustum-shaped opening and a cylindrical opening 182b at the end of the main body portion 180. The guiding surface 182a and the opening 182b are coaxially arranged.

[0073] The guiding surface 182a is an annular conical surface that gradually reduces in diameter from the upper end toward the opening 182b, forming an insertion port for the inner rod 110. When the first engaging portion 166 of the inner rod 110 deviates from the axis (center) of the opening 182b and the first engaging portion 166 abuts against the guiding surface 182a, the guiding surface 182a guides the first engaging portion 166 so that the axis (center) of the first engaging portion 166 and the axis (center) of the opening 182b become coaxial, or guides the first engaging portion 166 to the opening 182b.

[0074] The inner diameter of the opening 182b of the second engaging portion 182 is formed to be smaller than the first engaging portion 166 of the inner rod 110. Thus, when the first engaging portion 166 of the inner rod 110 is inserted, the inner peripheral surface of the opening 182b abuts against the first engaging portion 166, and after the first engaging portion 166 is inserted, the first engaging portion 166 abuts against the peripheral portion of the opening 182b of the second engaging portion 182, thereby engaging with the first engaging portion 166.

[0075] The first engaging portion 166 of the inner rod 110 and the second engaging portion 182 of the plug 112 are engaged by pressing the first engaging portion 166 into the second engaging portion 182, so that the first engaging portion 166 and the second engaging portion 182 are elastically deformed, and the first engaging portion 166 is inserted from the opening 182b of the second engaging portion 182. Thus, the first engaging portion 166 of the inner rod 110 is located below the second engaging portion 182 of the plug 112, and the inner rod 110 is inserted into the plug 112.

[0076] The flange portion 184 is supported on the seat surface 74a of the plug seat portion 74. The outer diameter of the flange portion 184 is smaller than the inner diameter of the second cylinder 54 of the cylinder block 26. The outer diameter of the flange portion 184 is larger than the inner diameter of the valve seat 76a of the second annular portion 76 of the second cylinder 54. Therefore, the plug 112 is supported on the plug seat portion 74 with the flange portion 184 on the lower side.

[0077] Next, the dimensional relationship among the shaft body 162 of the inner rod 110, the first engaging portion 166, and the second engaging portion 182 of the plug 112 will be described.

[0078] As shown in Figure 7As shown, the outer diameter of the second shaft portion 174 of the shaft body 162 of the inner rod 110 is set to ΦA1, the maximum outer diameter of the end portion 166a of the first engaging portion 166 is set to ΦA2, the outer diameter of the restricting portion 166b of the first engaging portion 166 is set to ΦA3, and the outer diameter of the first shaft portion 172 is set to ΦA4. Additionally, the inner diameter (i.e., the maximum inner diameter of the guiding surface 182a) of the opening (insertion port) at the upper end of the guiding surface 182a of the second engaging portion 182 of the plug column 112 is set to ΦB1, and the inner diameter of the opening portion 182b of the second engaging portion 182 is set to ΦB2. At this time, the respective dimensions of the inner rod 110 are set such that ΦA4 > ΦA2 > ΦA1 and ΦA4 > ΦA2 > ΦA3. Additionally, the respective dimensions of the plug column 112 are set such that ΦB1 > ΦB2.

[0079] The outer diameter ΦA1 of the second shaft portion 174 of the inner rod 110 is set to be smaller than the maximum inner diameter ΦB1 of the guiding surface 182a and the inner diameter ΦB2 of the opening portion 182b of the second engaging portion 182 of the plug column 112 (ΦA1 < ΦB1, ΦA1 < ΦB2). The maximum outer diameter ΦA2 of the end portion 166a of the first engaging portion 166 of the inner rod 110 is set to be smaller than the maximum inner diameter ΦB1 of the guiding surface 182a of the second engaging portion 182 of the plug column 112 (ΦA2 < ΦB1), and larger than the inner diameter ΦB2 of the opening portion 182b (ΦA2 > ΦB2). Additionally, the inner rod 110 may also set the outer diameter ΦA1 of the second shaft portion 174 to be smaller than the maximum outer diameter ΦA2 of the end portion 166a of the first engaging portion 166, and larger than the inner diameter of the opening portion 182b (ΦB2 < ΦA1 < ΦA2).

[0080] The outer diameter ΦA3 of the restricting portion 166b of the first engaging portion 166 of the inner rod 110 is set to be smaller than the maximum inner diameter ΦB1 of the guiding surface 182a of the second engaging portion 182 of the plug column 112 (ΦA3 < ΦB1), and set to be equal to or smaller than the inner diameter ΦB2 of the opening portion 182b (ΦA3 ≤ ΦB2). The outer diameter ΦA4 of the first shaft portion 172 of the inner rod 110 is set to be larger than the maximum inner diameter ΦB1 of the guiding surface 182a and the inner diameter ΦB2 of the opening portion 182b of the second engaging portion 182 of the plug column 112 (ΦA4 > ΦB1, ΦA4 > ΦB2).

[0081] Additionally, when the inner rod 110 and the plug column 112 are inclined relative to each other by a predetermined angle θ, the restricting portion 166b abuts against the inner circumferential surface of the opening portion 182b of the second engaging portion 182, restricting the inner rod 110 and the plug column 112 from inclining beyond the predetermined angle θ. In other words, as Figure 8As shown in (being inserted), the restricting portion 166b is set such that when the inner rod 110 is inserted into the plug post 112, when the axis C1 of the inner rod 110 is inclined by a prescribed angle θ with respect to the axis C2 of the plug post 112, the outer diameter ΦA3 and / or the height from the end portion 166a at which a part of the restricting portion 166b abuts against the inner peripheral surface of the opening portion 182b.

[0082] With respect to the second engaging portion 182 of the plug post 112, the inner rod 110 and the plug post 112 in these dimensional relationships, the second shaft portion 174 of the shaft body 162 of the inner rod 110 can move along the axes of the inner rod 110 and the plug post 112. In addition, the first shaft portion 172 or the shaft diameter changing portion 176 of the shaft body 162 abuts against the second engaging portion 182.

[0083] Therefore, the inner rod 110 and the plug post 112 can move within a relative prescribed range. Therefore, the second engaging portion 182 of the plug post 112 defines the moving range of the inner rod 110 in which the shaft body 162 and the first engaging portion 166 of the inner rod 110 move relative to the cylinder block 26 along the axes of the inner rod 110 and the plug post 112. In addition, when the restricting portion 166b abuts against the inner peripheral surface of the opening portion 182b, the inner rod 110 and the plug post 112 limit the relative inclination angle θ when the inner rod 110 and the plug post 112 are inserted. More specifically, when the axis C1 of the inner rod 110 is inclined with respect to the axis C2 of the plug post 112 and a part of the outer peripheral surface 166a1 of the end portion 166a of the inner rod 110, for example, the connection point (i.e., the boundary between the outer peripheral surface 166a1 and the curved surface 166a2) P1 of the outer peripheral surface 166a1 of the end portion 166a of the first engaging portion 166 and the curved surface 166a2 is connected, the restricting portion 166b abuts against the inner peripheral surface of the opening portion 182b.

[0084] In addition, as an example, the outer diameter ΦA1 of the second shaft portion 174 of the inner rod 110 is Φ1.55 mm, the maximum outer diameter ΦA2 of the end portion 166a of the first engaging portion 166 is Φ1.75 mm, and the outer diameter ΦA3 of the restricting portion 166b of the first engaging portion 166 is Φ1.4 mm. In addition, as an example, the inner diameter (maximum inner diameter) ΦB1 at the upper end of the guiding surface 182a of the second engaging portion 182 of the plug post 112 is Φ2.42 mm, and the inner diameter ΦB2 of the opening portion 182b of the second engaging portion 182 is 1.6 mm.

[0085] In addition, since the outer diameter ΦA3 of the restricting portion 166b of the first engaging portion 166 is equal to or less than the inner diameter ΦB2 of the opening portion 182b of the second engaging portion 182, ΦA3 is set to 1.6 mm or less, and the relative inclination angle during the insertion of the inner rod 110 and the plug 112 is a diameter at or less than a specified angle θ. For example, the specified angle θ, which is the relative inclination angle during the insertion of the inner rod 110 and the plug 112 restricted by the restricting portion 166b, is set to 22° or less, preferably 15° or less. In addition, the specified angle θ is an angle that can suppress the bending of the inner rod 110 generated when assembling the inner rod 110 and the plug 112, and can be appropriately set according to the material or shape of the inner rod 110, etc. However, the smaller one can further suppress the bending of the inner rod 110, so it is preferred. In addition, when the angle between the axis C2 of the plug 112 and the guiding surface 182a of the second engaging portion 182 of the plug 112 is β, the specified angle θ is set to be equal to or less than β (θ ≤ β).

[0086] In addition, as Figure 3 shown, the line connecting the connection point (i.e., the boundary between the outer peripheral surface 166a and the curved surface a2) P1 of the outer peripheral surface 166a of the end portion 166a connecting the first engaging portion 166 and the curved surface 166a2 and the corner portion (i.e., the edge portion of the outer peripheral surface and the end surface of the restricting portion 166b) P2 that is outside in the radial direction of the restricting portion 166b is set as the connection line L. In addition, Figure 3 shown, the angle between the axis C1 of the inner rod 110 and the connection line L is set as α. In addition, as Figure 6 shown, the angle between the axis C2 of the plug 112 and the guiding surface 182a of the second engaging portion 182 of the plug 112 is set as β. In addition, the outer diameter ΦA3 of such a first engaging portion 166 is 1.6 mm, and the corner portion of the first engaging portion 166 is a sharp edge. At this time, the angle α between the axis C1 of the inner rod 110 and the connection line L is set to 8.5° ≤ α ≤ β. By making the angle α between the axis C1 of the inner rod 110 and the connection line L within the above range, when the inner rod 110 and the plug 112 are inclined, the end portion 166a of the first engaging portion 166 abuts against the guiding surface 182a of the second engaging portion 182, the restricting portion 166b of the first engaging portion 166 abuts against the inner peripheral surface of the opening portion 182b of the second engaging portion 182, and the inclination angle of the inner rod 110 and the plug 112 is at or less than the specified angle θ.

[0087] The biasing member 114 is formed of, for example, a resin material or a metal material. The biasing member 114 is a compression coil spring wound in a coil shape around the axis. The upper end of the biasing member 114 is supported by the support seat 156 of the hydraulic piston 104, and the lower end is supported by the flange portion 184 of the plug column 112. The biasing member 114 is located outside the shaft body 162 of the inner rod 110 and outside the plug column 112. The biasing member 114 biases the hydraulic piston 104 toward the pneumatic piston 102. Therefore, in the first position, the hydraulic piston 104 is biased by the biasing member 114, and the valve element 164 at the upper end of the inner rod 110 is in close contact with the valve seat 154 of the hydraulic piston 104. In addition, the first engaging portion 166 of the inner rod 110 engages with the second engaging portion 182 of the plug column 112.

[0088] The piston unit 28 formed in this way is placed in the cylinder block 26 in which the spherical valve element 30 is provided between the second cylinder 54 and the mounting cylinder 56 of the cylinder block 26. The spherical valve element 30 is formed of, for example, a sphere made of a metal material or a resin material. The outer diameter of the spherical valve element 30 is larger than the inner diameter of the mounting cylinder 56. The outer diameter of the spherical valve element 30 is smaller than the inner diameter of the second cylinder 54 and the outer diameter of the flange portion 184 of the plug column 112.

[0089] The tube body 4 is a tube suitable for having flexibility. One end of the tube body 4 is connected to the pump dispenser 3, and the other end is a free end. The other end of the tube body 4 is in contact with, for example, the bottom surface of the container body 2.

[0090] The cap 5 is formed, for example, in a bottomed cylindrical shape with one end closed and the other end open. The cap 5 covers the nozzle 24 by engaging with the engaging portion 34b of the fixed portion 34 so that the operation of the nozzle 24 cannot be performed.

[0091] Next, a method of assembling the pump dispenser 3 and the ejection container 1 configured as described above will be briefly described.

[0092] Insert the first engaging portion 166 and the shaft body 162 of the inner rod 110 through the cylindrical body 152 of the hydraulic piston 104, and support the upper end of the biasing member 114 by the support seat 156 of the hydraulic piston 104. Place the second engaging portion 182 of the plug column 112 inside the biasing member 114. Then, insert the inner rod 110 into the plug column 112.

[0093] Specifically, as Figure 8As shown before embedding, first, the inner rod 110 and the plug 112 are relatively moved in the axial direction so that the first engaging portion 166 of the inner rod 110 and the second engaging portion 182 of the plug 112 are in contact. At this time, when the axis of the first engaging portion 166 is radially deviated from the axis of the second engaging portion 182, a part of the first engaging portion 166 contacts the guiding surface 182a of the second engaging portion 182, and the first engaging portion 166 is guided, so that the axis of the first engaging portion 166 and the axis of the second engaging portion 182 are coaxially arranged.

[0094] Moreover, when the inner rod 110 and the plug 112 are relatively moved in the axial direction, the end portion 166a of the first engaging portion 166 and the inner peripheral surface of the opening portion 182b of the plug 112 are in contact. At this time, since the maximum outer diameter ΦA2 of the end portion 166a is larger than the inner diameter of the opening portion 182b, the end portion 166a and the inner peripheral surface of the opening portion 182b are elastically deformed, and the first engaging portion 166 is inserted into the opening portion 182b. As Figure 8 As shown after embedding, the first engaging portion 166 is inserted into a position below the opening portion 182b. In addition, when the inner rod 110 and the plug 112 are embedded, external forces and tilts of the inner rod 110 and the plug 112 may occur when the inner rod 110 and the plug 112 are relatively moved in the axial direction. However, if the tilt angle of the axis C1 of the inner rod 110 with respect to the axis C2 of the plug 112 becomes a specified angle θ, a part of the restricting portion 166b contacts the inner peripheral surface of the opening portion 182b, and the tilt angle of the inner rod 110 and the plug 112 is limited to the specified angle θ as the upper limit. Therefore, bending deformation of the inner rod 110 can be suppressed.

[0095] In addition, the biasing member 114 is supported at its upper end by the support seat 156 of the hydraulic piston 104 and at its lower end by the flange portion 184 of the plug 112 in a compressed state shorter than the natural length. Therefore, the biasing member 114 biases the plug 112 downward with respect to the hydraulic piston 104. In addition, the first engaging portion 166 of the inner rod 110 is biased downward by the second engaging portion 182 of the plug 112. In addition, at this time, the valve element 164 of the inner rod 110 is supported by the valve seat 154 of the hydraulic piston 104.

[0096] In addition, the upper end of the hydraulic piston 104 is fitted into the first fitting cylinder 126 of the pneumatic piston 102. The piston unit 28 is configured in this way.

[0097] Next, the spherical valve element 30 is placed in the seat portion 74 for the plug rod of the second cylinder 54 of the cylinder block 26. In this state, the axis of the piston unit 28 is aligned with the axis of the cylinder block 26, and the piston unit 28 is placed in the cylinder block 26. Specifically, the plug rod 112, the biasing member 114, and the inner rod 110 are placed in the second cylinder 54, and the cylindrical main body portion 122 of the pneumatic piston 102 is placed in the first cylinder 52 while being in contact with the inner peripheral surface of the first cylinder 52 of the cylinder block 26. Thus, the spherical valve element 30 and the piston unit 28 are disposed in the cylinder block 26.

[0098] At this time, the pump type dispenser 3 forms an air chamber 210 between the lower side of the pneumatic piston 102, the lower side of the air chamber valve element 106, and the outside of the hydraulic piston 104 and the inside of the first cylinder 52 of the cylinder block 26. The pump type dispenser 3 forms a liquid chamber 220 between the inside of the second cylinder 54 of the cylinder block 26 and the spherical valve element 30.

[0099] In this state, the fixed end 64 of the cylinder block 26 is fitted and fixed between the outer peripheral surface of the nozzle guide cylinder 32 of the support portion 22 and the inner peripheral surface of the fixed portion 34. With the mesh filter 48 disposed in the flow path 24a of the nozzle 24, the second fitting cylinder 128 of the pneumatic piston 102 is fitted to the inner cylinder 42 of the nozzle 24. Thus, the pump type dispenser 3 is assembled. Further, a pipe body 4 is inserted and fixed in the mounting cylinder 56 of the pump type dispenser 3. The internal thread portion 34a of the fixed portion 34 of the support portion 22 is fastened to the external thread portion 14a of the fixed portion 14 of the container body 2, and the ejection container 1 is assembled.

[0100] Next, the operation of the ejection container 1 including the pump type dispenser 3 configured as described above will be described. Here, as an example where the liquid 400 is stored in the container body 2 and the liquid 400 is present in the liquid chamber 220, an example of ejecting the foamy liquid 400 from the nozzle 24 of the pump type dispenser 3 will be described.

[0101] When the nozzle 24 is at Figure 1 the upper limit position (top dead center), i.e., the first position shown, the spherical valve element 30 abuts against and closes the valve seat 76a of the second annular portion 76 of the cylinder block 26. The outer annular valve element 142 of the air chamber valve element 106 contacts the pneumatic piston 102 from below to prevent the communication between the air chamber 210 and the through hole 102a. The inner annular valve element 144 of the air chamber valve element 106 contacts the flange 158 of the hydraulic piston 104 from above to prevent the air chamber 210 from communicating with the outside of the piston unit 28 through the through hole 102a of the pneumatic piston 102. The valve element 164 of the inner rod 110 abuts against the valve seat 154 of the hydraulic piston 104.

[0102] When the valve core 164 of the inner rod 110 is supported by the valve seat 154 of the hydraulic piston 104, the axis of the inner rod 110 is aligned with or close to the axis of the hydraulic piston 104 (valve seat 154) at the upper end.

[0103] The plug 112 is received in the second cylinder 54 of the cylinder block 26, and the axis of the plug 112 is aligned with or substantially aligned with the axis of the cylinder block 26. The first engaging portion 166 of the inner rod 110 abuts against and supports the second engaging portion 182 of the plug 112 from below.

[0104] Therefore, the axes of the support portion 22, the nozzle 24, the cylinder block 26, the pneumatic piston 102, the hydraulic piston 104, the inner rod 110, and the plug 112 are coaxially arranged or substantially coaxially arranged.

[0105] Starting from this state, if the user presses the nozzle 24 downward against the support portion 22, the pneumatic piston 102 and the hydraulic piston 104 of the piston unit 28 move downward against the acting force of the biasing member 114. At this time, the air chamber 210 of the pneumatic piston 102 and the liquid chamber 220 of the hydraulic piston 104 are pressurized, and the spherical valve core 30 is pressurized downward. The first engaging portion 166 of the inner rod 110 moves downward relative to the second engaging portion 182 of the plug 112. The spherical valve core 30 maintains the closed state.

[0106] As the hydraulic piston 104 moves downward in the cylindrical body 152, a gap is generated between the valve seat 154 of the hydraulic piston 104 and the valve core 164 of the inner rod 110. Therefore, the liquid 400 enters the mixing chamber 136 in the first fitting cylinder 126 through between the outer peripheral surface of the shaft body 162 of the inner rod 110 and the inner peripheral surface of the cylindrical body 152 of the hydraulic piston 104, and between the valve core 164 of the inner rod 110 and the valve seat 154 of the hydraulic piston 104.

[0107] The valve core 164 of the inner rod 110 is pressed downward by the inner surface 136a of the mixing chamber 136 of the first fitting cylinder 126 of the pneumatic piston 102. When the valve core 164 of the inner rod 110 and the opening 138 approach, the valve core 164 is guided by the inner surface 136a toward the axis of the mixing chamber 136 (first fitting cylinder 126).

[0108] The outer annular valve core 142 of the air chamber valve core 106 maintains the closed state due to the pressure rise accompanying the reduction in the volume of the air chamber 210. The inner annular valve core 144 of the air chamber valve core 106 opens due to the pressure rise in the air chamber 210. Therefore, the air in the air chamber 210 enters the mixing chamber 136 through between the outer peripheral surface of the cylindrical body 152 of the hydraulic piston 104 and the inner annular valve core 144 of the air chamber valve core 106, and between the inner peripheral surface of the pneumatic piston 102 and the outer peripheral surface of the cylindrical body 152 of the hydraulic piston 104.

[0109] In the mixing chamber 136 within the first fitting cylinder 126, the liquid 400 and air are mixed. The liquid 400 mixed with air in the mixing chamber 136 passes through the mesh filter 48 within the flow path 24a, and the bubbles formed by the liquid 400 and air are refined. Thus, the liquid 400 becomes bubbly within the flow path 24a of the nozzle 24 and is ejected from the ejection cylinder 46 of the nozzle 24.

[0110] When the nozzle 24 is depressed to the maximum amount and the nozzle 24 is located at the lower limit position (bottom dead center), i.e., the second position, where it abuts against the nozzle guide cylinder 32 of the support portion 22, the spherical valve element 30 remains in a closed state. The outer annular valve element 142 of the air chamber valve element 106 remains in a closed state, and the inner annular valve element 144 is closed due to the gravity of the inner annular valve element 144 and the air that enters the cylinder block 26 through the through hole 62b of the first cylinder 52 of the cylinder block 26.

[0111] When the user releases the nozzle 24 from the state where the nozzle 24 is depressed to the maximum amount, the hydraulic piston 104, the pneumatic piston 102, and the nozzle 24 rise due to the acting force of the biasing member 114. At this time, the valve seat 154 of the hydraulic piston 104 abuts against the valve element 164 of the inner rod 110. Thus, the valve seat 154 of the hydraulic piston 104 closes with respect to the valve element 164 of the inner rod 110.

[0112] After that, the hydraulic piston 104, the pneumatic piston 102, the nozzle 24, and the inner rod 110 rise together with respect to the support portion 22. At this time, the volumes of the air chamber 210 and the liquid chamber 220 increase, and negative pressures are formed within the air chamber 210 and the liquid chamber 220, respectively. Thus, the outer annular valve element 142 of the air chamber valve element 106 opens, and the air that enters through the through hole 62b of the cylinder block 26 enters the air chamber 210. The spherical valve element 30 rises with respect to the valve seat 76a of the second annular portion 76 of the second cylinder 54 of the cylinder block 26, and the liquid 400 enters the negative pressure liquid chamber 220 through the pipe body 4. Thus, during the movement of the nozzle 24 from the lower limit position to the upper limit position, air is inhaled into the air chamber 210, and the liquid 400 is sucked into the liquid chamber 220. The liquid 400 flows not only inside the plug 112 but also between the outer peripheral surface of the plug 112 and the inside of the second cylinder 54 of the cylinder block 26 through the pipe body 4, the mounting cylinder 56, the inside of the flange portion 184 of the plug 112, and the opening 186 of the plug 112.

[0113] When the first engaging portion 166 of the inner rod 110 engages with the second engaging portion 182 of the plug 112, the ascent of the nozzle 24 stops and returns Figure 1 to the state

[0114] As described above, when the pump dispenser 3 of the ejection container 1 presses the nozzle 24 from the first position to the second position, the liquid 400 in the container body 2 is ejected in a foamed state, and when the nozzle 24 returns from the second position to the first position according to the acting force of the biasing member 114, the liquid 400 is sucked into the liquid chamber 220.

[0115] According to the ejection container 1 and the pump dispenser 3 configured as described above, even when the axis of the first engaging portion 166 provided at the lower end of the inner rod 110 deviates from the axis of the plug 112 or is inserted in an inclined state during assembly, the inclination of the axis of the first engaging portion 166 with respect to the axis of the plug 112 can be restricted to a specified inclination angle by the restricting portion 166b. That is, even if the axis C1 of the inner rod 110 is inclined with respect to the axis C2 of the plug 112, by the restricting portion 166b abutting against the inner peripheral surface of the opening portion 182b of the plug 112, the inner rod 110 can be prevented from inclining beyond a specified angle θ. More specifically, a part of the outer peripheral surface of the end portion 166a of the first engaging portion 166 and a part of the restricting portion 166b respectively abut against the guiding surface 182a of the second engaging portion 182 and the inner peripheral surface of the opening portion 182b, and the inner rod 110 can be prevented from inclining with respect to the plug 112 beyond the specified angle θ.

[0116] As described above, by providing the restricting portion 166b, the upper limit angle θ of the inclination of the inner rod 110 and the plug 112 can be set. Therefore, compared with the case of the inner rod 110A shown in the comparative example that does not have the restricting portion 166b, during assembly, the relative inclination of the inner rod 110 and the plug 112 can be suppressed. Figure 7 Therefore, when an external force is applied to insert the inner rod 110 into the plug 112, the inner rod 110 can be prevented from being bent due to the inner rod 110 inclining beyond the specified angle θ. Therefore, when assembling using an assembling device for the pump dispenser 3, the bending defect of the inner rod 110 can be reduced.

[0117] As described above, according to the pump dispenser 3 and the ejection container 1, the relative inclination of the inner rod and the plug can be suppressed during assembly.

[0118] In addition, the present invention is not limited to the above-described embodiment. In the above example, as shown, the restricting portion 166b is described as an example of a circumferentially continuous protrusion and is illustrated as being cylindrical, but is not limited thereto. That is, as long as the restricting portion 166b is a structure that can abut against the inner peripheral surface of the opening portion 182b when the inclination angles of the inner rod 110 and the plug 112 are at the specified angle θ, the shape of the restricting portion 166b can be appropriately set. For example, as

[0119] shown, Figure 4 Figure 9 Figure 9As in the other embodiments shown, the restricting portion 166b of the first engaging portion 166 may also be a polygonal prism shape. In addition, when the restricting portion 166b is a polygonal prism shape, it is preferably a polygonal prism shape with 5 or more sides, that is, a pentagon or more. In addition, when the restricting portion 166b is such a polygonal prism shape, the outer diameter ΦA3 of the restricting portion 166b becomes the diameter of the circumscribed circle of the restricting portion 166b.

[0120] In addition, for example, as Figure 10 in the other embodiments shown, the restricting portion 166b of the first engaging portion 166 may also be a plurality of protrusions separated along the circumferential direction. For example, as Figure 10 shown, it may also be configured such that a plurality of first engaging portions 166 are provided, and the respective restricting portions 166b extend radially and are arranged at equal intervals in the circumferential direction. When such a plurality of restricting portions 166b are provided, the outer diameter ΦA3 of the restricting portion 166b becomes the diameter of the circumscribed circle of the plurality of restricting portions 166b.

[0121] In addition, in the above example, the structure in which the plug column 112 has a plurality of openings 186 formed in a rectangular shape extending in the axial direction has been described. However, for example, the opening 186 may also be a slit shape extending to the upper end of the plug column 112. In addition, although the guide surface 182a of the second engaging portion 182 of the plug column 112 has been described as an annular conical surface, it may also be a linear shape inclined with respect to the axis C2, or a curved surface shape in which the connecting line is inclined with respect to the axis C2.

[0122] In addition, in the above example, the example of the pump dispenser 3 in which the ejection container 1 has an air chamber 210 and a liquid chamber 220 has been described, but it is not limited thereto. The ejection container 1 may also be a structure that does not have an air chamber 210, that is, a structure that does not have the first cylinder (air pressure cylinder body) 52 and the air pressure piston 102, and only has a liquid chamber 220.

[0123] In addition, the structures of the inner rod 110 and the plug column 112 are not limited to the above examples. As long as the inner rod 110 and the plug column 112 can be inserted, and the relative movement range of the inner rod 110 and the plug column 112 is defined, and the restricting portion 166b is provided on one of the inner rod 110 and the plug column 112, and the inclination angle of the inner rod 110 and the plug column 112 is restricted to a specified angle θ, it can be applied to various structures. Therefore, it may also be a structure in which the plug column 112 is arranged above and the inner rod 110 is arranged below.

[0124] In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the gist thereof at the implementation stage. Further, the respective embodiments can be implemented in appropriate combination, and in such a case, combined effects can be obtained. In addition, the above-described embodiments include various inventions, and various inventions can be extracted by combinations selected from a plurality of disclosed technical features. For example, even if several technical features are deleted from all the technical features shown in the embodiments, the problem can be solved, and in the case of obtaining an effect, a configuration in which the technical feature is deleted can be extracted as an invention.

[0125] Description of Reference Numerals

[0126] 1... ejection container, 2... container body, 3... pump dispenser, 4... tube body, 5... lid, 12... main body, 14... fixing portion, 14a... external thread portion, 22... support portion, 24... nozzle, 24a... flow path, 26... cylinder block, 28... piston unit, 30... spherical valve element, 32... nozzle guide cylinder, 34... fixed portion, 34a... internal thread portion, 34b... fitting portion, 42... inner cylinder, 44... outer cylinder, 46... ejection cylinder, 48... mesh filter, 48a... main trunk portion, 48b... mesh, 48c... mesh, 52... first cylinder (pneumatic cylinder block), 54... second cylinder (hydraulic cylinder block), 56... mounting cylinder, 62... first sliding portion, 62b... through hole, 64... fixed end, 64a... seal, 66... first annular portion, 72... second sliding portion, 74... seat portion for plug, 74a... seat surface, 76... second annular portion, 76a... valve seat, 102... pneumatic piston, 102a... through hole, 104... hydraulic piston, 106... valve element for air chamber, 110... inner rod (rod-shaped valve element), 112... plug, 114... biasing member, 122... main body portion, 124... holding portion, 126... first fitting cylinder, 128... second fitting cylinder, 136... mixing chamber, 136a... inner surface, 138... opening, 140... cylindrical portion, 142... outer annular valve element, 144... inner annular valve element, 152... cylindrical body, 152a... rib, 154... valve seat, 156... support seat, 158... flange, 158a... notch, 162... shaft body (rod portion), 164... valve element, 166... first engaging portion, 166a... end portion, 166a1... outer peripheral surface, 166a2... curved surface, 166b... restricting portion, 172... first shaft portion, 174... second shaft portion, 176... shaft diameter changing portion, 180... main trunk portion, 182... second engaging portion, 182a... guiding surface, 182b... opening portion, 184... flange portion, 186... opening, 210... air chamber, 220... liquid chamber, 400... liquid (content).

Claims

1. A pump dispenser, characterized in that, The pump dispenser includes: a nozzle; a cylinder body; a hydraulic piston disposed in the cylinder body and reciprocating as the nozzle reciprocates; an inner rod inserted inside the hydraulic piston, moving along the axis as the nozzle reciprocates, and having a first engaging portion at one end; and a cylindrical plug column housed in a liquid chamber formed by the hydraulic piston and the cylinder body, into which the inner rod is inserted, and having a second engaging portion that defines a moving range of the inner rod moving relative to the cylinder body by engaging with the first engaging portion, the second engaging portion has a guiding surface that guides the first engaging portion and is inclined with respect to the axis of the plug column, and an opening portion for the first engaging portion to be inserted is formed on the guiding surface, the first engaging portion has: an end portion formed to have a diameter larger than that of the opening portion; and a restricting portion provided on the end portion to restrict relative inclination of the plug column and the inner rod by abutting against the inner peripheral surface of the opening portion.

2. The pump dispenser according to claim 1, characterized in that, The restricting portion is a circumferentially continuous protrusion or a plurality of protrusions provided separately in the circumferential direction.

3. The pump dispenser according to claim 1, characterized in that, The outer diameter of the restricting portion is equal to or less than the inner diameter of the opening portion.

4. The pump dispenser according to claim 3, characterized in that, The end portion has an outer peripheral surface and a curved surface, assuming the angle of a connecting line with respect to the axis of the inner rod is α, and the angle of the guiding surface with respect to the axis of the plug column is β, then 8.5° ≤ α ≤ β, and the connecting line connects the connection point of the outer peripheral surface and the curved surface to the corner portion of the restricting portion.

5. The pump dispenser according to claim 4, characterized in that, When the outer peripheral surface of the end portion abuts against the guiding surface, the restricting portion abuts against the inner peripheral surface of the opening portion.

6. The pump dispenser according to claim 2, characterized in that, The restricting portion is a columnar protrusion coaxial with the end portion.

7. An ejection container, characterized in that, The ejection container includes: the pump dispenser according to any one of claims 1 to 6; a container body that can be detached from and attached to the pump dispenser; and a tube body installed on the cylinder body of the pump dispenser.

8. An ejection container filled with contents, characterized in that, The ejection container filled with a content includes: the ejection container according to claim 7; and a content housed in the ejection container.

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