Pump dispenser, discharge container, and discharge container containing contents

Abstract

A pump distributor (3) is provided with: an air compression cylinder (52); an air compression piston (102) which is provided in the air compression cylinder (52) and reciprocates; a liquid cylinder (54); a hydraulic piston (104) that reciprocates in the liquid cylinder (54); a mixing chamber (136) which is provided on the secondary side of the pneumatic piston (102) and the hydraulic piston (104), mixes the liquid (400) supplied by the reciprocating motion of the pneumatic piston (102) and the hydraulic piston (104) with air, and has a communication hole (138) formed in the upper wall thereof; a porous body (24) provided on the secondary side of the mixing chamber (136); and a nozzle (22) which forms a flow path (22a) on the secondary side of the communication hole (24), and which forms a discharge hole (48d) having a smaller opening area than the flow path (22a), and which reciprocates the air compression piston (102) and the hydraulic piston (104).

Description

Technical Field

[0001] The present invention relates to a pump dispenser for dispensing liquid in a foamy form, a dispensing container, and a dispensing container containing the contents. Background Art

[0002] For example, as disclosed in Japanese Patent Application Laid-Open No. 2019-177950, pump dispensers that dispense liquids in a foamy form and dispenser containers using these pump dispensers have been known. Such dispensers dispense pressurized foam by pressing a nozzle, but the dispensed foam falls roughly vertically from the nozzle tip when the nozzle is pressed slowly. Furthermore, even when the nozzle is pressed quickly, the dispensed foam is projected horizontally but still only sprayed close to the container. Therefore, it is impossible to increase the flight distance of the dispensed foam, such as by causing it to adhere to a target far from the nozzle or by rapidly ejecting it toward a target near the nozzle.

[0003] Furthermore, to form good foam, a liquid mixed with air needs to be pumped from a mixing chamber for mixing air and liquid to a porous body (mesh holder) provided in a foam flow path at the outlet of the mixing chamber. However, the pressure during this pumping affects the foam quality.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Publication No. 2019-177950 Summary of the Invention

[0007] Problems to be solved by the invention

[0008] In the above-mentioned spray container, the pressure of the liquid pumped from the mixing chamber to the mesh holding body when the nozzle is pressed cannot be greatly changed in order not to affect the foam quality.

[0009] Therefore, an object of the present invention is to provide a pump dispenser, a spray container, and a spray container containing a content, which can increase the flight distance of the sprayed foam while maintaining the stability of the foam quality.

[0010] Solutions to Problems

[0011] According to one embodiment of the present invention, a pump-type dispenser comprises: a pneumatic cylinder; a pneumatic piston, which is arranged in the pneumatic cylinder and performs reciprocating motion; a hydraulic cylinder; a hydraulic piston, which is arranged in the hydraulic cylinder and performs reciprocating motion; a mixing chamber, which is arranged on the secondary side of the pneumatic piston and the hydraulic piston, mixes the liquid and air supplied by the reciprocating motion of the pneumatic piston and the hydraulic piston, and has a connecting hole formed on the upper wall; a porous body, which is arranged on the secondary side of the mixing chamber; and a nozzle, which forms a flow path on the secondary side of the connecting hole and has a spray hole with an opening area smaller than the opening area of ​​the flow path, so that the pneumatic piston and the hydraulic piston are reciprocated by the reciprocating motion of the nozzle.

[0012] According to one aspect of the present invention, a dispensing container includes a container body for storing a liquid and the pump dispenser fixed to the container body.

[0013] According to one aspect of the present invention, a dispensing container containing a content includes a liquid, a container body that accommodates the liquid, and the pump dispenser fixed to the container body.

[0014] Effects of the Invention

[0015] According to the present invention, a pump dispenser, a dispensing container, and a dispensing container containing a content thereof can be provided, which can increase the flight distance of the discharged foam while maintaining the stability of the foam quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a side view showing the structure of the spray container according to one embodiment of the present invention in a partial cross section.

[0017] Figure 2 It is a front view showing the structure of the pump dispenser of the spray container.

[0018] Figure 3 It is a cross-sectional view showing the structure of the pump dispenser with the nozzle in a first position.

[0019] Figure 4 This is a cross-sectional view showing the structure of the pump dispenser with the nozzle in the second position.

[0020] Figure 5 This is a perspective view showing the structure of a nozzle head used in the pump dispenser.

[0021] Figure 6 It is a perspective view showing the structure of the nozzle head.

[0022] Figure 7 This is a front view showing the structure of the nozzle head.

[0023] Figure 8Therefore Figure 7 The section taken along line VIII-VIII is a cross-sectional view of the structure of the nozzle head.

[0024] Figure 9 It is a front view showing the structure of another example of the nozzle head.

[0025] Figure 10 It is a front view showing the structure of another example of the nozzle head.

[0026] Figure 11 It is an explanatory diagram showing the results of the first evaluation test of the discharge container.

[0027] Figure 12 It is an explanatory diagram showing the results of the second evaluation test of the discharge container.

[0028] Figure 13 It is an explanatory diagram showing the results of the third evaluation test of the spray container.

[0029] Figure 14 It is an explanatory diagram showing the results of the fourth evaluation test of the spray container.

[0030] Figure 15 It is a front view showing the structure of another modified example of the nozzle head. DETAILED DESCRIPTION

[0031] Below, use Figures 1 to 10 The structure of the discharge container 1 according to one embodiment of the present invention will be described.

[0032] Figure 1 This is a side view showing a partial cross section of the structure of a discharge container 1 according to one embodiment of the present invention. Figure 2 It is a front view showing the structure of the pump dispenser 3 for dispensing the container 1.

[0033] Figure 3 2 is a cross-sectional view showing the structure of the pump dispenser 3 with the nozzle 22 in the first position. Figure 4 This is a cross-sectional view showing the structure of the pump dispenser 3 with the nozzle 22 in the second position.

[0034] Figure 5 and Figure 6 The present invention is a perspective view showing the structure of the nozzle head 48 used in the pump dispenser 3 from different directions. Figure 7 It is a front view showing the structure of the nozzle head 48. Figure 8 Therefore Figure 7 The section taken along line VIII-VIII is a cross-sectional view of the structure of the nozzle head 48 . Figure 9 4 is a front view showing the structure of another example of the nozzle head 48. Figure 10It is a front view showing the structure of another example of the nozzle head 48.

[0035] [Spray container 1]

[0036] like Figure 1 As shown, the spray container 1 includes a container body 2, a pump dispenser 3 and a tube body 4. Figure 1 The illustrated discharge container 1 is a filled discharge container containing a liquid 400 as a content.

[0037] Dispenser 1 is a so-called manual pump that uses a pump dispenser 3 to draw liquid 400 stored in container 2 through tube 4 and dispense the liquid 400 in the form of foam. In this embodiment, container 2 of dispenser 1 is positioned at the bottom, and pump dispenser 3 is positioned at the top, defining the vertical direction. The following description will provide this aspect.

[0038] The liquid 400 is the content stored in the container 2. The liquid 400 is a cosmetic, detergent, pharmaceutical, a product with a mild pharmacological effect, a food, etc. Specific examples of the liquid 400 include liquids containing surfactants such as shampoo, hand soap, facial cleanser, and shaving cream.

[0039] The container body 2 is, for example, a bottomed cylindrical shape, such as a bottomed cylindrical shape, but is not limited to a cylindrical shape as long as it can store the liquid 400. The container body 2 can store the liquid 400 therein. The container body 2 is formed of a resin material, a metal material, glass, or ceramics. The container body 2 includes a main body 12 for storing the liquid 400 and a fixing portion 14 having an opening portion in which a portion of the upper end of the main body 12 protrudes and opens. The fixing portion 14 is formed so as to be able to fix the pump dispenser 3. Figure 3 As shown, the fixing portion 14 has, for example, an external thread portion 14 a on its outer peripheral surface.

[0040] like Figures 1 to 4 As shown, the pump dispenser 3 includes a support 20, a nozzle 22, a mesh holder 24, a cylinder 26, a piston unit 28, and a spherical valve core 30. The nozzle 22, the mesh holder 24, and the piston unit 28 constitute a rod that reciprocates in one direction relative to the support 20 and the cylinder 26.

[0041] The support portion 20 includes, for example, a cylindrical nozzle guide tube 32 and a fixed portion 34 having a larger diameter than the nozzle guide tube 32 and fixed to the fixing portion 14 of the container body 2. The support portion 20 extends the nozzle guide tube 32 from an opening at one end of the fixed portion 34 toward the outside of the fixed portion 34. In other words, the nozzle guide tube 32 extends upward from the center of the fixed portion 34. The nozzle guide tube 32 and the fixed portion 34 are integrally molded from, for example, a resin material. The nozzle guide tube 32 and the fixed portion 34 are, for example, coaxially disposed.

[0042] The nozzle guide tube 32 guides the nozzle 22 so that the nozzle 22 can move in the up-down direction, in other words, so that the nozzle 22 can move along the axis of the nozzle guide tube 32 .

[0043] The fixed portion 34 gradually tapers to a curved shape at its upper end, for example. The fixed portion 34 has an internal threaded portion 34a formed on the inner circumferential surface. The internal threaded portion 34a is screwed into the external threaded portion 14a of the container body 2. As a result, the container body 2 and the pump dispenser 3 are formed so that they can be assembled and disassembled. Alternatively, the fixed portion 34 may be a structure that is fixed to the container body 2 by interlocking. In addition, the spray container 1 may also have a cover for preventing erroneous operation of the nozzle 22. In the case of such a spray container 1, the fixed portion 34 has an interlocking portion on the outer circumferential surface that can be interlocked.

[0044] The nozzle 22 is disposed above the support portion 20. The nozzle 22 comprises an inner cylinder 42, an outer cylinder 44 having a larger diameter than the inner cylinder 42, a discharge cylinder 46 in fluid communication with the inner cylinder 42, and a nozzle head 48 disposed within the discharge cylinder 46. The inner cylinder 42, outer cylinder 44, and discharge cylinder 46 are integrally molded from, for example, a resin material. The inner diameter of the outer cylinder 44 is formed to be larger than the outer diameter of the nozzle guide cylinder 32.

[0045] The inner cylinder 42 and the ejection cylinder 46 together form a continuous flow path 22a from the mesh retaining body 24 to the outside, through which the foamed liquid 400 flows. Here, the flow path 22a of the nozzle 22 is formed in the inner cylinder 42, for example, and includes a first flow path 22a1 extending along the direction of movement of the nozzle 22, and a second flow path 22a2 extending in a direction intersecting the first flow path 22a1, or in this embodiment, in a direction orthogonal to the first flow path 22a1.

[0046] A portion of the lower end of the inner cylinder 42 is disposed within the nozzle guide cylinder 32 and is configured to reciprocate in one direction within the nozzle guide cylinder 32. The outer cylinder 44 reciprocates relative to the support portion 20 along the axis of the nozzle guide cylinder 32 between a first position (normal position) and a second position (pressing position) different from the first position. For example, the inner cylinder 42 and the outer cylinder 44 are coaxially arranged.

[0047] The ejection tube 46 protrudes from the upper end of the inner tube 42 in a direction intersecting the axis of the inner tube 42, for example, to the side. The flow path cross-sectional area of ​​the ejection tube 46 gradually increases from the open end of the second flow path 22a2 that is continuous with the inner tube 42 to the middle of the second flow path 22a2, specifically, to the nozzle head 48. The ejection tube 46 is formed so that the nozzle head 48 can be fitted at the end. Figures 1 to 4 As shown in FIG, the ejection tube 46 is formed into a rectangular tube shape, for example. As a specific example, Figure 2As shown, the ejection tube 46 is formed into a rectangular cylindrical shape, with the width direction being longer than the vertical direction. Alternatively, the ejection tube 46 may have a shape other than a rectangular cylindrical shape, such as a cylindrical shape, an elliptical cylindrical shape, or a polygonal cylindrical shape other than a rectangular shape. The ejection tube 46 has an engaging portion 46a, such as a protrusion or a groove, on its inner circumferential surface at the distal end for engaging with the nozzle head 48. The engaging portion 46a is, for example, an annular protrusion.

[0048] like Figures 2 to 8 As shown in FIG. 4 , the nozzle head 48 is formed into a bottomed cylindrical shape. The nozzle head 48 is provided on the second flow path 22a2. Figure 3 and Figure 4 As shown, the nozzle head 48 is fitted with the ejection tube 46 in a posture in which the axial direction of the nozzle head 48 is the same as the axial direction of the ejection tube 46 (the axial direction of the second flow path 22a2). For example, since the ejection tube 46 is a rectangular tube, Figure 5 As shown in FIG. 4 , the nozzle head 48 is formed in a bottomed rectangular cylindrical shape whose width direction is longer than the vertical direction. The nozzle head 48 has a peripheral wall portion 48a and a bottom wall portion 48b.

[0049] The peripheral wall portion 48a is formed in a rectangular cylindrical shape and has an engaged portion 48c such as a protrusion or groove on its outer peripheral surface for engaging with the engaging portion 46a of the ejection tube 46. The internal space of the peripheral wall portion 48a constitutes a portion of the second flow path 22a2.

[0050] The engaged portion 48c is formed, for example, by an annular groove and an annular protrusion arranged axially on the peripheral wall portion 48a. In other words, the engaged portion 48c is reduced in size on the bottom wall portion 48b side of the peripheral wall portion 48a, and the annular protrusion is formed adjacent to the reduced portion, creating a continuous annular groove and protrusion. Furthermore, by arranging the engaging portion 46a within the groove of the engaged portion 48c, the protrusion of the engaged portion 48c engages with the engaging portion 46a in the axial direction of the ejection tube 46 and the nozzle head 48, allowing the nozzle head 48 to engage with the ejection tube 46.

[0051] The bottom wall portion 48b is formed in a flat plate shape. When the nozzle head 48 is engaged with the ejection tube 46, the bottom wall portion 48b extends in a direction perpendicular to the axial direction of the ejection tube 46. A ejection hole 48d is formed in the bottom wall portion 48b. The thickness of the bottom wall portion 48b is formed, for example, to be 0.5 mm to 3.0 mm. This is to maintain the rigidity of the bottom wall portion 48b by the thickness of the bottom wall portion 48b, and to minimize the influence of the pressure loss of the foamy liquid 400 passing through the ejection hole 48d formed in the bottom wall portion 48b, thereby ensuring a range of appropriate ejection distance.

[0052] The ejection hole 48d is provided on the flow path 22a formed in the nozzle 22. The ejection hole 48d is provided on the second flow path 22a2. The axial direction of the ejection hole 48d is, for example, along the axial direction of the peripheral wall portion 48a and the axial direction of the ejection tube 46 (the second flow path 22a2). The ejection hole 48d is arranged between the end of the ejection tube 46 and the end portion continuous with the inner tube 42 of the ejection tube 46 (the boundary between the first flow path 22a1 and the second flow path 22a2). That is, the ejection hole 48d is provided at the end of the ejection tube 46 or at a position closer to the inner tube 42 side than the end of the ejection tube 46, that is, inside. Preferably, the ejection hole 48d is provided at a position closer to the inside than the end of the ejection tube 46. The ejection hole 48d is formed, for example, at the center of the bottom wall portion 48b. The flow path cross-sectional area (opening area) of the ejection hole 48d is smaller than the flow path cross-sectional area of ​​the inner tube 42, the flow path cross-sectional area of ​​the ejection tube 46, and the flow path cross-sectional area of ​​the peripheral wall portion 48a. The ejection hole 48d is, for example, a circular opening. Furthermore, the inner diameter of the ejection hole 48d is, for example, formed to be constant.

[0053] The inner diameter of the ejection hole 48d is in the range of 0.5 mm to 3.0 mm, more preferably in the range of 1.0 mm to 2.0 mm. In other words, the flow path cross-sectional area (opening area) of the ejection hole 48d is in the range of 0.19 mm2 to 7.10 mm2, more preferably in the range of 0.78 mm2 to 3.20 mm2.

[0054] In addition, the ejection hole 48d is as follows Figure 9 As shown in the modified example, it can be a rectangular opening, and in addition, Figure 10 In the embodiment of the present invention, the ejection hole 48d may be elliptical in shape, as shown in other modified examples. In addition, when being made into the rectangular ejection hole 48d, the ejection hole 48d may be square or rectangular. In addition, the ejection hole 48d may be formed into other shapes, polygonal or special-shaped.

[0055] The mesh retainer 24 is disposed on the inner cylinder 42. The mesh retainer 24 is disposed on the primary side of the flow path 22a. The mesh retainer 24 produces high-quality foamed liquid 400 when the liquid 400 and gas pass through it. The mesh retainer 24 is supported, for example, within the inner cylinder 42. The mesh retainer 24 is a porous body having a cylindrical main body 24a and two meshes 24b and 24c separated from the main body 24a. For example, the two meshes 24b and 24c are fixed to both ends of the main body 24a.

[0056] The cylinder body 26 is supported on the lower side of the support portion 20. The cylinder body 26 is cylindrical. The cylinder body 26 includes a first cylinder (pneumatic cylinder) 52, a second cylinder (hydraulic cylinder) 54 having an inner circumference smaller than that of the first cylinder 52, and a mounting cylinder 56 having an inner circumference smaller than that of the second cylinder 54 and to which the tube body 4 is mounted. The first cylinder 52, the second cylinder 54, and the mounting cylinder 56 are integrally molded from, for example, a resin material. The first cylinder 52, the second cylinder 54, and the mounting cylinder 56 are coaxially arranged and coaxially arranged with the support portion 20.

[0057] The first cylinder 52 includes a first sliding portion 62 on which the pneumatic piston 102 (described later) of the piston unit 28 slides; a fixed end 64 supported between the outer circumferential surface of the nozzle guide cylinder 32 of the support portion 20 and the inner circumferential surface of the fixed portion 34; and a first annular portion 66 that connects the lower end of the first cylinder 52 with the second cylinder 54. The first sliding portion 62 has, for example, a constant inner diameter. Furthermore, a through-hole 62b is formed in the first sliding portion 62. This 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, providing communication between the interior of the first cylinder 52 and the interior of the container body 2.

[0058] The fixed end 64 is provided at the upper end of the first slidable portion 62 and is continuous with the first slidable portion 62. The fixed end 64 is, for example, fitted between the outer peripheral surface of the nozzle guide cylinder 32 of the support portion 20 and the inner peripheral surface of the fixed portion 34, and is supported at the upper end of the fixed portion 14 of the container body 2 via a seal 64a. The first annular portion 66 is provided below the first slidable portion 62. The first annular portion 66 is integrally continuous with the first slidable portion 62 at the outer peripheral edge, is open at the center side, and is integrally continuous with the second cylinder 54 at the center side. For example, the first annular portion 66 is inclined relative to the axis in a manner such that the outer peripheral side is downward and the center side is upward, from the outer peripheral side toward the opening at the center side.

[0059] The second cylinder 54 includes a second slidable portion 72 on which a hydraulic piston 104 of the piston unit 28 described later slides, a plug seat 74 that supports a plug 112 of the piston unit 28 described later, and a second annular portion 76 continuous with the mounting cylinder 56 .

[0060] The second sliding portion 72 has, for example, a constant inner diameter. The plug seat portion 74 includes a seat surface 74a extending in a direction perpendicular to the axis of the second cylinder 54. The seat surface 74a supports the plug 112 on its upper surface. The second annular portion 76 includes a valve seat 76a for the spherical valve element 30. The valve seat 76a annularly contacts a portion of the outer circumferential surface of the spherical valve element 30.

[0061] The piston unit 28 is supported by the nozzle 22 and is disposed within the support portion 20, the nozzle 22, and the cylinder 26. The piston unit 28 includes a pneumatic piston 102, a hydraulic piston 104, an air chamber valve element 106, an inner rod 110, a plunger 112, and a biasing member 114.

[0062] The pneumatic piston 102 is coaxially arranged with the hydraulic piston 104. The pneumatic piston 102 includes an annular main body 122, a retaining portion 124 that holds the air chamber valve core 106, a cylindrical first fitting tube 126 that fits with the hydraulic piston 104, and a cylindrical second fitting tube 128 that fits with the nozzle 22. The main body 122, retaining portion 124, first fitting tube 126, and second fitting tube 128 are integrally molded from, for example, a resin material. Furthermore, one or more through-holes 102a are formed in a portion between the main body 122 and retaining portion 124 of the pneumatic piston 102, extending vertically through the pneumatic piston 102.

[0063] When the pneumatic piston 102 moves in the vertical direction (axial direction), the main body 122 slides on the inner circumferential surface of the first sliding portion 62 of the cylinder 26. The outer diameter of at least a portion of the main body 122, for example, the outer diameters of the upper and lower ends of the main body 122, is formed to be the same diameter as or slightly larger than the inner diameter of the inner circumferential surface of the first sliding portion 62 of the cylinder 26. When the main body 122 contacts the first sliding portion 62 of the cylinder 26, the main body 122 elastically deforms, maintaining contact with the inner circumferential surface of the first sliding portion 62 of the cylinder 26, and can slide while sealing the air chamber 210.

[0064] The retaining portion 124 is provided radially inward of the main body 122. The retaining portion 124 is formed into a bi-cylindrical shape having a diameter smaller than the inner diameter of the main body 122, and is fitted between an inner cylinder and an outer cylinder to retain the air chamber valve element 106.

[0065] The diameter of the first fitting cylinder 126 is smaller than the inner diameter of the inner cylinder of the retaining portion 124. The first fitting cylinder 126 fits into the upper end of the hydraulic piston 104. The upper end of the hydraulic piston 104 and the upper end of the inner rod 110 are located inside the first fitting cylinder 126. Together with the upper end of the hydraulic piston 104, the first fitting cylinder 126 forms a mixing chamber 136 for the supplied air and liquid 400. Specifically, the mixing chamber 136 is formed on the secondary side of the pneumatic piston 102 and the secondary side of the hydraulic piston 104, where the air supplied from the pneumatic piston 102 and the liquid 400 supplied from the hydraulic piston 104 mix. The mixing chamber 136 communicates with the flow path 22a of the nozzle 22. Furthermore, a communication hole 138 is formed in the upper portion of the mixing chamber 136 of the first fitting cylinder 126, connecting the mixing chamber 136 with the flow path 22a of the nozzle 22.

[0066] The inner surface 136a of the mixing chamber 136 inside the first fitting cylinder 126 has an inclined surface or ribs that can press the valve core 164 of the inner rod 110. The inclined surface or ribs of the mixing chamber 136 are inclined so that the inner diameter or width decreases from the hydraulic piston 104 side toward the flow path 22a of the nozzle 22.

[0067] The communication hole 138 is formed in the upper wall formed at the upper portion of the mixing chamber 136. The communication hole 138 is formed, for example, at the center of the upper wall of the mixing chamber 136. The flow path cross-sectional area (opening area) of the communication hole 138 is smaller than the flow path cross-sectional area of ​​the inner cylinder 42, the flow path cross-sectional area of ​​the ejection cylinder 46, and the flow path cross-sectional area of ​​the mixing chamber 136. The communication hole 138 is, for example, a circular opening.

[0068] The second fitting tube 128 is fitted with, for example, the inner peripheral surface of the inner tube 42 of the nozzle 22. Therefore, the pneumatic piston 102 moves along with the movement of the nozzle 22.

[0069] The air chamber valve core 106 is annular and made of a resin material having a higher flexibility than the pneumatic piston 102. The air chamber valve core 106 includes a cylindrical portion 140 held by the retaining portion 124 below the retaining portion 124, and an outer annular valve core 142 and an inner annular valve core 144 integrally formed with the lower end of the cylindrical portion 140.

[0070] The cylindrical portion 140 is fitted into the gap between the outer and inner cylinders of the retaining portion 124. The outer annular valve core 142 is formed into an annular shape, extending radially outward from the lower end of the cylindrical portion 140. The outer annular valve core 142 opens and closes the through-hole 102a, which serves as the flow path for air in the pneumatic piston 102. The inner annular valve core 144 is formed into an annular shape, extending radially inward from the lower end of the cylindrical portion 140. The inner annular valve core 144 opens and closes the flow path for air between the hydraulic piston 104 and the first fitting cylinder 126. The outer and inner annular valve cores 142 and 144 elastically deform due to changes in air pressure associated with the movement of the nozzle 22, thereby opening and closing the flow path for air.

[0071] The hydraulic piston 104 is fitted into the first fitting tube 126 inside the pneumatic piston 102. The hydraulic piston 104, together with the first tube 52 of the cylinder 26 and the pneumatic piston 102, forms an air chamber 210. Furthermore, the hydraulic piston 104, together with the second tube 54 of the cylinder 26, forms a liquid chamber 220. As the nozzle 22 reciprocates, the hydraulic piston 104 reciprocates along with the pneumatic piston 102, thereby changing the volumes of the air chamber 210 and the liquid chamber 220.

[0072] The hydraulic piston 104 includes a cylindrical body 152, a valve seat 154, a support seat 156 supporting the upper end of the urging member 114, and a flange 158 extending radially outward from the cylindrical body 152. The cylindrical body 152, valve seat 154, support seat 156, and flange 158 are integrally molded from, for example, a resin material.

[0073] The upper end of the cylindrical body 152 is engaged with the first mating tube 126 of the pneumatic piston 102. The outer circumferential surface of the upper end of the cylindrical body 152 has a plurality of ribs 152a extending in the axial direction and protruding radially outward. 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 predetermined intervals along the circumferential direction on the outer circumferential surface of the upper end of the cylindrical body 152. When the upper end of the cylindrical body 152 of the hydraulic piston 104 is engaged with the first mating tube 126 of the pneumatic piston 102, an air passage allowing air to flow is formed between the outer circumferential surface of the cylindrical body 152 of the hydraulic piston 104 and the first mating tube 126 of the pneumatic piston 102 via the plurality of ribs 152a. Alternatively, the cylindrical body 152 may not include the plurality of ribs 152 a that form the air passage, but may instead be configured such that the air passage is formed by a cutout or the like formed inside the first fitting cylinder 126 .

[0074] The outer diameter of the lower end portion of the cylindrical body 152 below the flange 158 is the same as, or slightly larger than, the inner diameter of the second slidable portion 72 of the second tube 54 of the cylinder 26. Therefore, the cylindrical body 152 of the hydraulic piston 104 slides on the inner circumferential surface of the second slidable portion 72 of the second tube 54 of the cylinder 26 while sealing the liquid chamber 220.

[0075] 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 an annular shape.

[0076] The support seat 156 is an annular seat surface extending perpendicularly 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.

[0077] like Figure 3 and Figure 4 As shown, the inner lever 110 includes a shaft 162, a valve core 164 provided at the upper end of the shaft 162, and a first engaging portion 166 provided at the lower end of the shaft 162. The shaft 162, the valve core 164, and the first engaging portion 166 are coaxially arranged. Furthermore, the shaft 162, the valve core 164, and the first engaging portion 166 are integrally formed from a resin material.

[0078] The outer diameter of the shaft body 162 is smaller than the inner diameter of the hydraulic piston 104. The shaft body 162 includes, for example, a first shaft portion 172, a second shaft portion 174, and a shaft diameter change portion 176. The first shaft portion 172 of the shaft body 162 is continuous with the valve core 164. The second shaft portion 174 of the shaft body 162 is continuous with the first engaging portion 166. The first and second shaft portions 172, 174 are cylindrical. The cross-sectional area of ​​the shaft body 162 perpendicular to the axis of the first shaft portion 172, which is continuous with the valve core 164, is larger than the cross-sectional area of ​​the second shaft portion 174, which is continuous with the first engaging portion 166. The shaft diameter change portion 176 of the shaft body 162, where the cross-sectional area changes between the first and second shaft portions 172, 174, is tapered. The area where the diameter of the shaft body 162 changes may also be formed as a step. Furthermore, the second shaft portion 174 may include reinforcing ribs or the like extending in the axial direction and protruding radially as reinforcement.

[0079] The valve element 164 is formed as a poppet valve, for example. The longitudinal section including the axis of the valve element 164 is formed into a substantially triangular pyramid or V-shape having an inclined surface. The valve element 164 can contact and separate from the valve seat 154 of the hydraulic piston 104.

[0080] The first engaging portion 166 has a larger cross-sectional area perpendicular to the axis than the second shaft portion 174 of the shaft body 162. The first engaging portion 166 is formed in a conical shape, a dome shape, a spherical shape, or the like.

[0081] like Figure 3 and Figure 4 As shown, the plug 112 includes a cylindrical body 180, a second engaging portion 182 formed as a circular opening on the inner circumference of the upper end of the body 180, and a flange 184 formed at the lower end. The body 180, the second engaging portion 182, and the flange 184 are coaxially arranged.

[0082] A plurality of openings 186 are formed at the lower end of the main body 180. These openings 186 serve as liquid passages connecting the inside and outside of the plug 112. The openings 186 are rectangular and extend along the axis. The inner diameter of the main body 180 is larger than that of the second engaging portion 182.

[0083] The second engaging portion 182 is provided at the upper end of the main body 180 for the first engaging portion 166 of the inner rod 110 to be embedded in, and is an annular opening portion that engages with the first engaging portion 166 in the axial direction and in the direction in which the inner rod 110 and the plug 112 separate.

[0084] The flange portion 184 is supported on the seat surface 74a of the plug seat 74. The outer diameter of the flange portion 184 is smaller than the inner diameter of the second tube 54 of the cylinder 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 tube 54. Therefore, the plug 112 is supported on the plug seat 74 with the flange portion 184 facing downward.

[0085] Next, a specific example of the discharge hole 48d formed in the nozzle 22 of the pump dispenser 3 configured as described above and the communication hole 138 formed in the mixing chamber 136 will be described.

[0086] For example, the ejection hole 48d is formed to have the smallest flow path cross-sectional area in the flow path 22a of the nozzle 22 on the secondary side of the communicating hole 138. Furthermore, if the portion of the flow path 22a of the nozzle 22 with the smallest flow path cross-sectional area between the secondary side of the communicating hole 138 and the ejection hole 48d is defined as the reference portion 22b, the flow path cross-sectional area of ​​the ejection hole 48d is smaller than the flow path cross-sectional area of ​​the reference portion 22b. In this embodiment, the reference portion 22b is the intersection of the first flow path 22a1 within the inner tube 42 and the second flow path 22a2 within the ejection tube 46.

[0087] As a specific example, the flow path cross-sectional area of ​​the ejection hole 48d is set to be in the range of 0.5% to 40% of the flow path cross-sectional area of ​​the reference portion 22b. More preferably, the flow path cross-sectional area of ​​the ejection hole 48d is set to be in the range of 0.5% to 20% of the flow path cross-sectional area of ​​the reference portion 22b.

[0088] The ejection hole 48d is the same size as or smaller than the communicating hole 138. In other words, the flow path cross-sectional area of ​​the ejection hole 48d is less than or equal to the flow path cross-sectional area of ​​the communicating hole 138. In the present embodiment, the thickness of the bottom wall portion 48b forming the ejection hole 48d is 0.8 mm, and the thickness of the wall forming the communicating hole 138 is 1.0 mm.

[0089] The flow path cross-sectional area of ​​the communication hole 138 is smaller than the flow path cross-sectional area of ​​the reference portion 22b. As a specific example, the flow path cross-sectional area of ​​the discharge hole 48d is set within a range of 2% to 60% of the flow path cross-sectional area of ​​the reference portion 22b. More preferably, the flow path cross-sectional area of ​​the discharge hole 48d is set within a range of 2% to 40% of the flow path cross-sectional area of ​​the reference portion 22b.

[0090] Furthermore, the cross-sectional area of ​​the second flow path 22a2 within the ejection tube 46 gradually increases from the reference portion 22b (the primary side of the second flow path 22a2) to the ejection hole 48d. Furthermore, the cross-sectional area of ​​the flow path within the peripheral wall portion 48a of the nozzle head 48, which forms part of the second flow path 22a2, gradually increases from the ejection hole 48d side to the distal end of the nozzle head 48 (the distal end of the ejection tube 46).

[0091] The thus configured discharge container 1 includes a discharge hole 48d in the flow path 22a within the nozzle 22, which has a smaller cross-sectional area than the flow path 22a. By increasing the pressure of the foamed liquid 400 passing through the mesh retaining member (porous body) 24 via the discharge hole 48d, the discharge container 1 can extend the discharge distance of the foamed liquid 400 while maintaining its foam quality. Consequently, the discharge container 1 can cause the foamed liquid 400 to adhere to a target located far from the nozzle 22.

[0092] Furthermore, the spray container 1 has a communication hole 138 on the primary side of the mesh retaining body 24 and on the secondary side of the mixing chamber 136. Thus, the spray container 1 can further increase the spray distance of the foamed liquid 400. Furthermore, the spray container 1 can increase the spray distance of the foamed liquid 400 by arranging the spray hole 48d between the distal end of the spray tube 46 and the end portion continuous with the inner tube 42 of the spray tube 46. Furthermore, by arranging the spray hole 48d inside the distal end, the spray container 1 can further increase the spray distance of the foamed liquid 400 compared to a structure in which the spray hole 48d is arranged at the distal end of the spray hole 48d.

[0093] Furthermore, the nozzle 22 is shaped so that the cross-sectional area of ​​the second flow path 22a2 on the secondary side of the ejection hole 48d, that is, the inner diameter of the peripheral wall portion 48a, gradually increases from the main surface of the bottom wall portion 48b, which is on the ejection hole 48d side, toward the distal end of the ejection tube 46. This prevents the foamy liquid 400 that has passed through the ejection hole 48d from contacting the inner surface of the peripheral wall portion 48a during ejection, thereby preventing a reduction in the ejection distance caused by contact with the peripheral wall portion 48a during ejection.

[0094] [Evaluation Test of Dispenser 1]

[0095] Next, the evaluation test and the evaluation results of the thus configured spray container will be described. The evaluation test is for more specifically describing the effects of the present embodiment, and the scope of the present invention is not limited to the following examples.

[0096] [First evaluation test]

[0097] As a first evaluation test, three types of pump dispensers 3 with different discharge amounts (g) of the liquid 400 were used to evaluate the discharge distance (mm) of the foamed liquid 100 relative to the presence or absence of the discharge hole 48d and the hole diameter (mm) of the discharge hole 48d.

[0098] Three types of pump dispensers 3 were used: 0.95g, 0.80g, and 0.45g. Here, the pump dispenser 3 with a 0.95g discharge volume is designated as Pump A, the pump dispenser 3 with a 0.80g discharge volume is designated as Pump B, and the pump dispenser with a 0.45g discharge volume is designated as Pump C. Pumps A through C differ in discharge volume by varying the diameters of the cylinder 26 and piston unit 28, while maintaining the same stroke length of the piston unit 28 (nozzle 22).

[0099] As examples, three types of nozzle tips 48 were used in each of pumps A through C: nozzle tips 48 with discharge holes 48d having diameters of 1.0 mm, 2.0 mm, and 3.0 mm, and axial lengths of 0.8 mm, respectively. Furthermore, as comparative examples, pumps A through C without discharge holes 48d, as in conventional pump dispensers, were used. Pumps A through C without discharge holes 48d are defined as pumps A through C without nozzle tips 48 within the discharge tube 46. In each of pumps A through C, the inner diameter of the mixing chamber 136 was 6.4 mm, the diameter of the communicating hole 138 was 2.0 mm, and the axial length of the communicating hole 138 was 1.0 mm.

[0100] In addition, the liquid 400 used used MONOGEN Y-500T (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) (registered trademark) as a surfactant.

[0101] Then, the nozzles 22 of pumps A to C were operated at 50 mm / sec, and the ejection distance of the foamy liquid 400 was measured three times respectively, and the average value was calculated.

[0102] [Results of the first evaluation test]

[0103] Figure 11 The results of the first evaluation test are shown. First, the results of the first evaluation test for Pump A are described. As a comparative example, in Pump A without the ejection hole 48d, the foamy liquid 400 was ejected over a distance of 140 mm. In contrast, in Pump A with the ejection hole 48d as an example, the ejection distance was 1275 mm when the hole diameter of the ejection hole 48d was 1.0 mm, 1156 mm when the hole diameter of the ejection hole 48d was 2.0 mm, and 493 mm when the hole diameter of the ejection hole 48d was 3.0 mm.

[0104] This also shows that the discharge distance of the foamy liquid 400 is longer in the pump A having the discharge hole 48d than in the pump A without the discharge hole 48d. Furthermore, it can be seen that the discharge distance decreases as the diameter of the discharge hole 48d increases. Therefore, it can be seen that the discharge distance can be adjusted by adjusting the diameter of the discharge hole 48d.

[0105] Next, the results of the first evaluation test of Pump B will be described. As a comparative example, in Pump B without the discharge hole 48d, the foamy liquid 400 was discharged over a distance of 112 mm. In contrast, in Pump B with the discharge hole 48d as an example, the discharge distance was 1597 mm when the discharge hole 48d had a diameter of 1.0 mm, 1563 mm when the discharge hole 48d had a diameter of 2.0 mm, and 760 mm when the discharge hole 48d had a diameter of 3.0 mm.

[0106] This also shows that the discharge distance of the foamy liquid 400 increases in the pump B having the discharge hole 48d compared to the pump B without the discharge hole 48d. Furthermore, it can be seen that the discharge distance decreases as the diameter of the discharge hole 48d increases from 1.0 mm to 3.0 mm. Therefore, it can be seen that the discharge distance can be adjusted by adjusting the diameter of the discharge hole 48d.

[0107] Next, the results of the first evaluation test of Pump C will be described. As a comparative example, in a pump C without a discharge hole 48d, the foamy liquid 400 was discharged over a distance of 100 mm. In contrast, in a pump C with a discharge hole 48d as an example, when the discharge hole 48d had a diameter of 1.0 mm, the discharge distance was 1778 mm; when the discharge hole 48d had a diameter of 2.0 mm, the discharge distance was 802 mm; and when the discharge hole 48d had a diameter of 3.0 mm, the discharge distance was 157 mm.

[0108] This also shows that the discharge distance of the foamy liquid 400 increases in the pump C having the discharge hole 48d compared to the pump C without the discharge hole 48d. Furthermore, it can be seen that the discharge distance decreases as the diameter of the discharge hole 48d increases from 1.0 mm to 3.0 mm. Therefore, it can be seen that the discharge distance can be adjusted by adjusting the diameter of the discharge hole 48d.

[0109] Furthermore, the results of the evaluation tests of pumps A to C show that providing the discharge hole 48d increases the discharge distance of the foamed liquid 400, regardless of the discharge volume of the pump dispenser 3, and that the discharge distance can be adjusted by adjusting the diameter of the discharge hole 48d. Furthermore, in pump C, when the discharge hole 48d had a diameter of 3.0 mm, the discharge distance was only increased by 50 mm compared to when the discharge hole 48d was not present. Furthermore, for all pumps A to C, the difference in discharge distance was significant when the discharge hole 48d had a diameter of 2.0 mm or 3.0 mm. This indicates that, to ensure a sufficient discharge distance, the discharge hole 48d diameter is preferably 3.0 mm or less, and more preferably 2.0 mm or less. However, since the structure in which the ejection hole 48d is provided extends the ejection distance compared to the structure without the ejection hole 48d, the ejection hole may be 3.0 mm or more depending on the desired ejection distance.

[0110] [Second evaluation test]

[0111] As a second evaluation test, the foam density (g / cm2) of the foamed liquid 100 was measured using three types of pumps A to C with different discharge amounts (g) of the liquid 400. 3 ) Evaluation relative to the hole diameter (mm) of the ejection hole 48d.

[0112] In the second evaluation test, the same pumps A to C as in the first evaluation test were used, and in each of the pumps A to C, three types of nozzle heads 48 were used, each having a discharge hole 48d diameter of 1.0 mm, 2.0 mm, and 3.0 mm and an axial length of 0.8 mm.

[0113] In addition, the liquid 400 used used MONOGEN Y-500T (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) (registered trademark) as a surfactant.

[0114] Then, the nozzles 22 of pumps A to C were operated at 50 mm / sec, and a full cup of foamy liquid 400 was placed in a predetermined container of measured internal volume. The weight was measured three times, and the average value was obtained.

[0115] In addition, based on the discharge volumes of pumps A to C, the standard value of the bubble density in pump A is 0.095 g / cm 3 ±0.015g / cm 3 The standard value of the bubble density in pump B is 0.08 g / cm 3 ±0.015g / cm 3 The standard value of the bubble density in pump C is 0.045 g / cm 3 ±0.015g / cm 3 .

[0116] [Results of the Second Evaluation Test]

[0117] Figure 12 The results of the second evaluation test are shown. In the pump A having the discharge hole 48d, the bubble density when the hole diameter of the discharge hole 48d is 1.0 mm is 0.1046 g / cm 3 The bubble density when the diameter of the ejection hole 48d is 2.0 mm is 0.1017 g / cm 3 The bubble density when the diameter of the ejection hole 48d is 3.0 mm is 0.1001 g / cm 3 .

[0118] In the pump B having the discharge hole 48d, the bubble density when the hole diameter of the discharge hole 48d is 1.0 mm is 0.0846 g / cm 3 The bubble density when the diameter of the ejection hole 48d is 2.0 mm is 0.0805 g / cm 3 The bubble density when the diameter of the ejection hole 48d is 3.0 mm is 0.0804 g / cm 3 .

[0119] In the pump C having the discharge hole 48d, the bubble density when the hole diameter of the discharge hole 48d is 1.0 mm is 0.0490 g / cm 3 The bubble density when the diameter of the ejection hole 48d is 2.0 mm is 0.0496 g / cm 3 When the diameter of the ejection hole 48d is 3.0 mm, the bubble density is 0.0466 g / cm 3 .

[0120] The bubble density is within the standard value range for any of the ejection holes 48d of pumps A to C. This shows that even with the provision of the ejection holes 48d, the foam quality of the foamed liquid 400 is appropriate, ensuring foam stability.

[0121] [Third evaluation test]

[0122] As a third evaluation test, the pump dispenser 3 was used to evaluate the discharge distance (mm) of the foamy liquid 100 relative to the presence or absence of the communication hole 138 .

[0123] The pump dispenser 3 uses two pumps A with a discharge volume of 0.95 g, the aperture (mm) of the discharge hole 48d is 1.0 mm, the inner diameter of the mixing chamber 136 is 6.4 mm, the aperture of the connecting hole 138 of one pump A (with a connecting hole) is 2.0 mm, and the other pump A (without a connecting hole) does not have a connecting hole 138, and the upper end of the mixing chamber 136 opens with the same diameter (6.4 mm) as the inner diameter of the mixing chamber 136 (i.e., the mixing chamber 136 does not have an upper wall).

[0124] In addition, the liquid 400 used used MONOGEN Y-500T (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) (registered trademark) as a surfactant.

[0125] Then, the nozzles 22 of pumps A to C were operated at 50 mm / sec, and the ejection distance of the foamy liquid 400 was measured three times respectively, and the average value was calculated.

[0126] [Results of the third evaluation test]

[0127] Figure 13 The results of the third evaluation test are shown. In the pump A having the communication hole 138 , the foamy liquid 400 was ejected over a distance of 1424 mm. In contrast, in the pump A not having the communication hole 138 , the foamy liquid 400 was ejected over a distance of 1166 mm.

[0128] As can be seen from this, by forming a structure with the communicating holes 138 on the secondary side of the mixing chamber 136 and the primary side of the mesh retainer 24, it is possible to extend the ejection distance of the liquid body 400. This is because the speed of the liquid body 400 passing through the mixing chamber 136 and mixed with the air immersed in the mesh retainer 24 is increased, thereby increasing the pressure and speed of the liquid body 400.

[0129] [Fourth evaluation test]

[0130] As a fourth evaluation test, the pump dispenser 3 was used to evaluate the discharge distance (mm) of the foamed liquid 100 relative to the discharge hole 48 d .

[0131] The pump dispenser 3 uses two pumps A with a discharge volume of 0.95 g, the aperture (mm) of the discharge hole 48d is 1.0 mm, the inner diameter of the mixing chamber 136 is 6.4 mm, and the aperture of the connecting hole 138 is 2.0 mm. One pump A uses the discharge hole 48d as the end of the discharge tube 46 (the second flow path 22a2), and the other pump A uses the discharge hole 48d as the inner side of the end of the discharge tube 46 (the middle part of the second flow path 22a2) and is set at the reference position 22b of the discharge tube 46 (the boundary between the first flow path 22a1 and the second flow path 22a2).

[0132] In addition, the liquid 400 used used MONOGEN Y-500T (manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) (registered trademark) as a surfactant.

[0133] Then, the nozzles 22 of pumps A to C were operated at 50 mm / sec, and the ejection distance of the foamy liquid 400 was measured three times respectively, and the average value was calculated.

[0134] [Results of the fourth evaluation test]

[0135] Figure 14 The results of the fourth evaluation test are shown. In pump A, which had a discharge hole 48d at the distal end of the discharge tube 46, the foamy liquid 400 was discharged over a distance of 1424 mm. In contrast, in pump A, which had a discharge hole 48d midway along the discharge tube 46, the foamy liquid 400 was discharged over a distance of 1478 mm.

[0136] As can be seen from this, by providing the ejection hole 48d at a position further inward than the distal end of the ejection tube 46, the ejection distance of the foamy liquid 400 can be extended.

[0137] As described above, according to the spray container 1 of the embodiment, the spray container 1 having the spray hole 48d formed in the nozzle 22 can increase the flight distance of the sprayed foam while maintaining the stability of the foam quality.

[0138] In addition, the present invention is not limited to the above embodiment. For example, in the above example, the ejection hole 48d is described as an opening having a constant inner diameter in the axial direction, but the ejection hole 48d is not limited to this. For example, the ejection hole 48d may be Figure 15 As shown in the modified example, the ejection hole 48d may also be an opening with different diameters in the axial direction. Figure 15 In the example, the ejection hole 48d has a shape in which the diameter (width) is smallest at the center side in the axial direction of the ejection hole 48d, but it may also have a shape in which the diameter (width) is smallest on one side in the axial direction.

[0139] Furthermore, in the above example, the ejection hole 48d provided in the nozzle 22 is provided in the nozzle head 48, but this is not limiting. Specifically, the ejection hole 48d may be integrally formed with the ejection tube 46 of the nozzle 22 by protruding from the inner circumferential surface of the ejection tube 46. Alternatively, a member such as an orifice plate having the ejection hole 48d formed therein may be provided in the ejection tube 46 (nozzle 22) by insert molding. Furthermore, while an example has been described in which the wall surrounding the ejection hole 48d extends in a direction perpendicular to the axial direction of the ejection hole 48d (second flow path 22a2), this is not limiting and may also be inclined relative to the axial direction of the ejection hole 48d (second flow path 22a2).

[0140] In the above example, the discharge container 1 discharges the liquid 400 in a foamy state. However, even when a liquid 400 that does not form a foam is used and the liquid 400 is discharged in a liquid state, the effect of increasing the flight distance can be achieved.

[0141] That is, the present invention is not limited to the above-mentioned embodiments, and various modifications can be made during the implementation stage without departing from the scope of the main purpose. In addition, the various embodiments can also be implemented in appropriate combination, in which case the combined effect can be obtained. In addition, the above-mentioned embodiments include various inventions, and various inventions can be extracted by combining the multiple technical features disclosed. For example, in the case where the problem can be solved and the effect can be obtained even if several technical features are deleted from all the technical features shown in the embodiment, the configuration in which the technical features are deleted can be extracted as an invention.

[0142] Description of Reference Signs

[0143] 1…Dispenser, 2…Container, 3…Pump dispenser, 4…Tube, 12…Main body, 14…Fixed portion, 14a…Externally threaded portion, 20…Support, 22…Nozzle, 22a…Flow path, 22a1…First flow path, 22a2…Second flow path, 22b…Reference portion, 24…Mesh retainer (porous body), 24a…Main body, 24b…Net, 24c…Net, 26…Cylinder, 28…Piston unit, 30…Spherical valve core, 32…Nozzle guide tube, 34…Fixed portion 34a…Internal thread portion, 42…Inner tube, 44…Outer tube, 46…Discharge tube, 46a…Engaging portion, 48…Nozzle head, 48a…Surrounding wall portion, 48b…Bottom wall portion, 48c…Engaged portion, 48d…Discharge hole, 52…First tube (pneumatic cylinder), 54…Second tube (hydraulic cylinder), 56…Mounting tube, 62…First sliding portion, 62b…Through hole, 64…Fixed end, 64a…Seal, 66…First annular portion, 72…Second sliding portion, 74…Plug seat , 74a… Seating surface, 76… Second annular portion, 76a… Valve seat, 100… Liquid, 102… Pneumatic piston, 102a… Through hole, 104… Hydraulic piston, 106… Air chamber valve core, 110… Inner rod, 112… Plug, 114… Biasing member, 122… Main body, 124… Retaining portion, 126… First fitting cylinder, 128… Second fitting cylinder, 136… Mixing chamber, 136a… Inner surface, 138… Communication hole, 140… Cylindrical portion, 142… Outer Side annular valve core, 144…inner annular valve core, 152…cylindrical body, 152a…rib, 154…valve seat, 156…support seat, 158…flange, 158a…cutout, 162…shaft body, 164…valve core, 166…first engaging portion, 172…first shaft portion, 174…second shaft portion, 176…shaft diameter changing portion, 180…main body, 182…second engaging portion, 184…flange portion, 186…opening, 210…air chamber, 220…liquid chamber, 400…liquid body.

Claims

1. A pump dispenser, characterized in that: The pump dispenser comprises: Air cylinder; A pneumatic piston is disposed in the pneumatic cylinder and performs reciprocating motion; Hydraulic cylinder; A hydraulic piston is disposed in the hydraulic cylinder and performs reciprocating motion; a mixing chamber provided on the secondary side of the pneumatic piston and the hydraulic piston, mixing the liquid supplied by the reciprocating motion of the pneumatic piston and the hydraulic piston with air, and having a communicating hole formed on an upper wall; a porous body disposed on the secondary side of the mixing chamber; and The nozzle forms a flow path on the secondary side of the communicating hole and has a discharge hole having an opening area smaller than that of the flow path. The reciprocating motion of the nozzle causes the pneumatic piston and the hydraulic piston to reciprocate.

2. The pump dispenser according to claim 1, wherein The flow path cross-sectional area of ​​the ejection hole is smaller than the flow path cross-sectional area of ​​the communication hole.

3. The pump dispenser according to claim 1, wherein The diameter of the ejection hole is 0.5 mm to 3.0 mm.

4. The pump dispenser according to claim 1, wherein The diameter of the ejection hole is in a range of 0.5% to 40% of the diameter of a portion of the flow path having the smallest flow path cross-sectional area.

5. The pump dispenser according to claim 1, wherein The hole diameter of the communication hole is in a range of 2% to 60% of the portion of the flow path having the smallest flow path cross-sectional area in the flow path.

6. The pump dispenser according to claim 1, wherein The flow path includes a first flow path along a moving direction of the nozzle and a second flow path along a direction intersecting the first flow path. The ejection hole is provided on the second flow path, The axial direction of the ejection hole is along the axial direction of the second flow path.

7. The pump dispenser according to claim 6, wherein The ejection hole is provided in a midway portion of the second flow path.

8. The pump dispenser according to claim 7, wherein The flow channel cross-sectional area of ​​the second flow channel on the secondary side of the ejection hole gradually increases from the ejection hole side toward the distal end.

9. The pump dispenser according to claim 1, wherein The nozzle includes a cylindrical nozzle head provided on the flow path and having the ejection hole formed therein.

10. The pump dispenser according to claim 9, wherein The secondary side of the ejection hole of the nozzle head forms a part of the flow path. The flow path cross-sectional area on the secondary side of the ejection hole of the nozzle head gradually increases from the ejection hole side toward the distal end.

11. A spray container, characterized in that: The spray container comprises: a container for accommodating a liquid; and The pump dispenser according to any one of claims 1 to 10, which is fixed to the container body.

12. A spray container containing a content, characterized in that: The spray container containing the contents comprises: liquid; a container for containing the liquid; and The pump dispenser according to any one of claims 1 to 10, which is fixed to the container body.

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