Ejector

Abstract

In a discharger that can release residual pressure in the cylinder when the discharge of contents is complete, the discharge volume is stabilized. [Solution] The discharger 4 comprises a first cylinder section 20, a second cylinder section 30, a movable section 50, and a columnar section 80. The movable section 50 has a communication channel section 51 that connects the inside of the first cylinder section 20 and the inside of the second cylinder section 30, and a pressure accumulator valve section 72 that can open and close the space between the inside of the second cylinder section 30 and the discharge hole 48. The pressure accumulator valve section 72 is provided with a communication hole section 73 that connects the inside of the movable section 50 and the discharge hole 48. The movable section 50 is provided with an annular sealing projection 74 that contacts the columnar section 80. The columnar section 80 is provided with a recess 85 located below the sealing projection 74. When the sealing projection 74 is radially opposite to the recess 85, the inside of the first cylinder section 20 and the discharge hole 48 communicate through the gap between the inner circumferential surface of the movable section 50 and the outer circumferential surface of the columnar section 80, and through the communication hole section 73.

Description

Technical Field

[0001] The present invention relates to a discharger.

Background Art

[0002] As a pressure-accumulation type discharger, there is known a discharger including: a mounting member to be mounted on a mouth portion of a container body, a cylinder hanging downward from the mounting member, a plunger body that is biased upward relative to the cylinder and is provided to be movable up and down, and stands upright from the inside of the cylinder, a cylindrical stem that is provided to be movable up and down relative to the cylinder and forms a discharge valve between itself and the plunger body, and a head portion that is depressibly attached to an upper part of the stem and has a nozzle for discharging the content liquid (for example, refer to Patent Document 1). This type of discharger may be provided with a pressure relief portion that releases the hydraulic pressure in the cylinder into the container body when the discharge of the content liquid is completed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of Invention

Problems to be Solved by the Invention

[0004] However, in the discharger as described above, there is a problem that, for example, when the head portion is pressed quickly, the residual pressure in the cylinder escapes before a specified amount of the content is discharged, and the discharge amount becomes unstable.

[0005] The present invention has been made in view of such circumstances, and aims to stabilize the discharge amount in a discharger capable of releasing the residual pressure in the cylinder when the discharge of the content is completed.

Means for Solving the Problems

[0006] A discharger according to a first aspect of the present invention is a discharger attached to the mouth of a container body containing contents, comprising: a first cylinder portion whose interior is connected to the interior of the container body; a second cylinder portion positioned above the first cylinder portion and movable downward in an upward biased state; a cylindrical movable portion positioned between the first cylinder portion and the second cylinder portion in the vertical direction, movable downward in an upward biased state and opening downward; a head portion having a discharge hole connected to the interior of the second cylinder portion; a columnar portion inserted into the movable portion so as to be vertically movable; and a check valve portion that allows the flow of the contents from the interior of the container body to the interior of the first cylinder portion and restricts the flow of the contents from the interior of the first cylinder portion to the interior of the container body, wherein the movable portion comprises: a first piston portion slidably arranged vertically inside the first cylinder portion; and a check valve portion slidably arranged vertically inside the second cylinder portion. The device comprises a movably positioned second piston section, a communication passage section connecting the interior of the first cylinder section and the interior of the second cylinder section, and a pressure accumulator valve section that can open and close the space between the interior of the second cylinder section and the discharge hole. The pressure accumulator valve section is provided with a communication hole section that connects the interior of the movable section and the discharge hole. One of the inner circumferential surface of the movable section and the outer circumferential surface of the columnar section is provided with an annular sealing projection that protrudes radially to the other side and contacts the other. The other side is provided with a recess that is recessed radially to the opposite side from the one and is located below the sealing projection section. When the second cylinder section is in the lowered end position, the sealing projection section and the recess section face each other radially, and when the sealing projection section faces the recess section radially, the interior of the first cylinder section and the discharge hole communicate through the gap between the inner circumferential surface of the movable section and the outer circumferential surface of the columnar section, and through the communication hole section.

[0007] According to the first embodiment, when the pressure accumulator valve is closed before the second cylinder section is moved downward and the discharge of contents is completed, and residual pressure is generated inside the first cylinder section which is connected to the inside of the second cylinder section, the seal protrusion and recess face each other, allowing the residual pressure inside the first cylinder section to be released through the gap between the inner surface of the movable section and the outer surface of the columnar section, and through the communication hole. As a result, the residual pressure inside the first cylinder section can be released when the discharge of contents is completed, and unlike configurations in which the residual pressure inside the cylinder is released into the container body, even if the internal pressure inside the first cylinder section rises rapidly due to rapid operation of the dispenser, the internal pressure does not escape into the container body, so that a specified amount of contents can be discharged.Therefore, in a dispenser that can release the residual pressure inside the cylinder when the discharge of contents is completed, the discharge amount can be stabilized.

[0008] In a second aspect of the present invention, the discharger according to the first aspect may have a check valve formed at the lower end of the columnar portion.

[0009] According to the second embodiment, since the valve body can be formed integrally with the columnar portion, compared to a configuration in which a ball valve or the like is provided separately from the columnar portion, it is possible to reduce the number of parts and reduce manufacturing costs by reducing assembly man-hours.

[0010] A third aspect of the present invention is a discharger according to the second aspect, wherein the check valve portion is provided in the first cylinder portion and has a fitted valve seat that can be fitted to the valve body.

[0011] According to the third embodiment, it is easier to maintain the closed state of the check valve. Therefore, the function of the check valve can be stabilized regardless of the material used to form the check valve.

[0012] A discharger according to a fourth aspect of the present invention is a discharger according to any of the first to third aspects described above, wherein the movable part comprises an outer cylinder having the first piston part and the second piston part, and an inner cylinder disposed inside the outer cylinder part and having the pressure accumulator valve part, and one of the seal protrusion and the recess, and forming the communication flow path between itself and the outer cylinder part.

[0013] According to the fourth aspect, since the first piston portion and the second piston portion are provided on the same member, it is possible to avoid the formation of joint surfaces between multiple members in the communication flow path portion, as would occur when the first piston portion and the second piston portion are provided on separate members. Therefore, the airtightness of the interior of the first cylinder portion, the interior of the second cylinder portion, and the communication flow path portion can be improved. [Effects of the Invention]

[0014] According to the present invention, in a discharger that can release residual pressure in the cylinder when the discharge of contents is completed, the discharge volume can be stabilized. [Brief explanation of the drawing]

[0015] [Figure 1] This is a cross-sectional view showing the dispenser of an embodiment, specifically the dispenser in a state where the head portion is not pressed down. [Figure 2] This is a cross-sectional view showing the dispenser of an embodiment, specifically the dispenser in a state where the head portion is being pushed down. [Figure 3] This is a cross-sectional view showing the discharger of the embodiment, illustrating the discharger in a state where the head portion is being further pushed down from the state shown in Figure 2. [Figure 4] This is a cross-sectional view showing the discharger of an embodiment, with the head portion fully depressed. [Modes for carrying out the invention]

[0016] Hereinafter, embodiments of the dispenser according to the present invention will be described based on the drawings.

[0017] As shown in Figure 1, the dispenser 4 of the present embodiment is attached to the mouth portion 3 of the bottomed cylindrical container body 2 in which contents are stored. By mounting the dispenser 4 on the mouth portion 3, the dispensing container 1 including the container body 2 and the dispenser 4 is configured. The contents are, for example, liquids such as pharmaceuticals, cosmetics, and fragrances.

[0018] Here, the mouth portion 3 and the dispenser 4 are each formed in a cylindrical shape coaxially arranged on a common axis. Hereinafter, the common axis is referred to as the container axis O, and the direction along the container axis O is referred to as the vertical direction. Of the vertical directions, the direction from the bottom of the container body 2 toward the mouth portion 3 is defined as upward, and the opposite direction is defined as downward. In a plan view as viewed from the vertical direction, the direction intersecting the container axis O is referred to as the radial direction, and the direction orbiting around the container axis O is referred to as the circumferential direction.

[0019] The dispenser 4 includes a mounting cylinder portion 10, a first cylinder portion 20, a second cylinder portion 30, a head portion 40, a movable portion 50, a columnar portion 80, and a check valve portion 90.

[0020] The mounting cylinder portion 10 is mounted on the mouth portion 3 of the container body 2. The mounting cylinder portion 10 has an annular plate portion 11, a mounting cylinder portion main body 12, and an outer peripheral wall 14. The annular plate portion 11 is in the shape of an annular plate arranged coaxially with the container axis O.

[0021] The mounting cylinder portion main body 12 extends downward from the radially outer edge portion of the annular plate portion 11. The mounting cylinder portion main body 12 is in a cylindrical shape arranged coaxially with the container axis O. The mounting cylinder portion main body 12 is open downward. A female thread is formed on the inner peripheral surface of the mounting cylinder portion main body 12. The female thread of the mounting cylinder portion main body 12 is threadedly engaged with a male thread formed on the mouth portion 3 of the container body 2. Thereby, the mounting cylinder portion 10 is mounted on the mouth portion 3, and the dispenser 4 is fixed to the container body 2.

[0022] The outer peripheral wall 14 protrudes upward from the radially inner edge of the annular plate portion 11. The outer peripheral wall 14 has a cylindrical shape arranged coaxially with the container axis O. The outer peripheral wall 14 is located radially inward of the mounting cylinder portion main body 12. The outer peripheral wall 14 is open upward. On the inner peripheral surface at the upper end portion of the outer peripheral wall 14, an engagement protrusion protruding radially inward is formed. A cap body 6 covering the head portion 40 is detachably attached to the outer peripheral surface of the outer peripheral wall 14.

[0023] The first cylinder portion 20 has a cylindrical shape extending in the vertical direction. The first cylinder portion 20 is arranged coaxially with the container axis O. The first cylinder portion 20 is open on both sides in the vertical direction. The first cylinder portion 20 protrudes downward beyond the mounting cylinder portion 10 from the inside of the mounting cylinder portion 10. The first cylinder portion 20 is inserted into the interior of the container body 2. The outer diameter of the first cylinder portion 20 is smaller than the inner diameter of the annular plate portion 11.

[0024] The first cylinder portion 20 includes a cylindrical peripheral wall portion 21, a cylinder flange portion 22 extending radially outward from the upper end of the peripheral wall portion 21, and a mounting cylinder 23. The peripheral wall portion 21 is formed in a multi-stage cylindrical shape whose inner diameter increases toward the upper side. Specifically, the peripheral wall portion 21 is formed by a lower cylinder portion 21a, a middle cylinder portion 21b, and an upper cylinder portion 21c connected sequentially from below to above. The lower cylinder portion 21a is formed in a bottomed cylindrical shape. A through hole 25 penetrating in the vertical direction is formed in the bottom wall of the lower cylinder portion 21a. On the inner peripheral surface of the lower cylinder portion 21a, a regulation convex portion 26 is provided protruding radially inward. A plurality of the regulation convex portions 26 are arranged at intervals from each other along the circumferential direction.

[0025] The cylinder flange portion 22 is fitted into the interior at the upper end of the mounting cylinder portion main body 12. Thereby, the first cylinder portion 20 is attached to the mounting cylinder portion 10 via the cylinder flange portion 22. The upper surface of the cylinder flange portion 22 is in contact with the lower surface of the annular plate portion 11. The lower surface of the cylinder flange portion 22 contacts the upper end of the mouth portion 3 of the container body 2 via the seal member 5.

[0026] The mounting cylinder 23 extends downward from the bottom wall of the lower cylinder portion 21a. The inside of the mounting cylinder 23 communicates with the inside of the peripheral wall portion 21 through the through hole 25 in the bottom wall of the lower cylinder portion 21a. The mounting cylinder 23 opens downward. The upper end of the suction cylinder 24 is fitted inside the mounting cylinder 23. The inside of the first cylinder portion 20 communicates with the inside of the container body 2 via the suction cylinder 24.

[0027] The second cylinder portion 30 is positioned above the first cylinder portion 20 and is movable downward while biased upward. The second cylinder portion 30 is a cylindrical shape with a top that opens downward. The second cylinder portion 30 is positioned coaxially with the container axis O. The second cylinder portion 30 has a top wall 31 and a circumferential wall 32. The top wall 31 is a disc shape positioned coaxially with the container axis O. A through hole 33 is formed in the center of the top wall 31, penetrating the top wall 31 in the vertical direction.

[0028] The peripheral wall 32 extends downward from the radial outer edge of the top wall 31. The peripheral wall 32 is cylindrical with an opening downward. The lower end of the peripheral wall 32 is fitted radially inward to the upper cylindrical portion 21c of the first cylinder portion 20. The peripheral wall 32 is slidable vertically relative to the upper cylindrical portion 21c.

[0029] In this embodiment, the peripheral wall 32 is formed by two members. Specifically, the peripheral wall 32 is formed by an inner cylindrical member 36 provided integrally with the top wall 31, and an outer cylindrical member 37 fitted radially outward of the inner cylindrical member 36 and extending downward from the inner cylindrical member 36. The outer cylindrical member 37 is inserted inside the upper cylindrical portion 21c of the first cylinder portion 20.

[0030] The second cylinder portion 30 further comprises a protruding cylindrical portion 34 that protrudes upward from the upper surface of the top wall 31, and a hanging cylindrical portion 35 that protrudes downward from the lower surface of the top wall 31 inside the peripheral wall 32. The protruding cylindrical portion 34 is cylindrical with an upward opening. The protruding cylindrical portion 34 is arranged coaxially with the container axis O. The protruding cylindrical portion 34 protrudes upward from the peripheral edge of the through hole 33 in the top wall 31. The hanging cylindrical portion 35 is cylindrical with a downward opening. The hanging cylindrical portion 35 is arranged coaxially with the container axis O. The hanging cylindrical portion 35 protrudes downward from the peripheral edge of the through hole 33 in the top wall 31. The hanging cylindrical portion 35 has a gap around its entire circumference relative to the peripheral wall 32. The inside of the hanging cylindrical portion 35 is connected to the inside of the protruding cylindrical portion 34 via the through hole 33.

[0031] The head portion 40 is attached to the second cylinder portion 30. The head portion 40 is positioned coaxially with the container axis O and is a substantially cylindrical shape with a top that opens downward. The head portion 40, together with the second cylinder portion 30, is movable downward while biased upward. The head portion 40 has a head top wall portion 41, a head outer cylinder portion 42 extending downward from the radial outer edge of the head top wall portion 41, and a head inner cylinder portion 43 located radially inside the head outer cylinder portion 42 and extending downward from the head top wall portion 41. The head top wall portion 41 is positioned above the top wall 31 of the second cylinder portion 30. The head top wall portion 41 is in contact with the upper surface of the top wall 31.

[0032] The head outer cylinder portion 42 is fitted radially outward to the peripheral wall 32 of the second cylinder portion 30. The lower end of the head outer cylinder portion 42 is located above the lower end of the second cylinder portion 30. The lower end of the head outer cylinder portion 42 is inserted inside the peripheral wall 14 of the mounting cylinder portion 10. An engaging projection is formed on the peripheral surface of the lower end of the head outer cylinder portion 42, projecting radially outward. The engaging projection of the head outer cylinder portion 42 engages with the engaging projection of the peripheral wall 14 from below.

[0033] The inner cylinder portion 43 of the head is fitted radially inward to the protruding cylinder portion 34 provided on the second cylinder portion 30. As a result, the head portion 40 is attached to the second cylinder portion 30 via the protruding cylinder portion 34.

[0034] The head portion 40 has a nozzle portion 44. The nozzle portion 44 has a nozzle through hole 45, a nozzle tip 46, and a nozzle shaft portion 47. The nozzle through-hole 45 is a hole that extends radially from the outer circumferential surface of the head outer cylinder portion 42 to the inner circumferential surface of the head inner cylinder portion 43.

[0035] The nozzle tip 46 is fitted and fixed into the nozzle through-hole 45 from the radially outer side. The nozzle tip 46 is a cylindrical member that opens radially inward and has a lid on the radially outer side. A discharge hole 48 is formed in the center of the lid of the nozzle tip 46, passing radially through the lid of the nozzle tip 46. The discharge hole 48 is connected to the inside of the second cylinder part 30 via the nozzle through-hole 45, the inside of the head inner cylinder part 43, the inside of the protruding cylinder part 34 provided in the second cylinder part 30, and the inside of the second cylinder part 30 via the through-hole 33.

[0036] The nozzle shaft portion 47 protrudes radially outward from the head inner cylinder portion 43. The nozzle shaft portion 47 is inserted inside the nozzle tip 46. The radially outer end of the nozzle shaft portion 47 faces the lid portion of the nozzle tip 46 with a gap between them. The outer circumferential surface of the nozzle shaft portion 47 faces the inner circumferential surface of the nozzle tip 46 with a gap between them.

[0037] The movable part 50 is positioned between the first cylinder part 20 and the second cylinder part 30 in the vertical direction and is movable downward while biased upward. The movable part 50 is positioned coaxially with the container axis O and is cylindrical in shape, extending vertically as a whole. The movable part 50 is open downwards. The movable part 50 has an outer cylinder part 60, an inner cylinder part 70, and a connecting part 75.

[0038] The outer cylinder portion 60 is cylindrical in shape and extends in the vertical direction. The outer cylinder portion 60 is arranged coaxially with the container axis O. The outer cylinder portion 60 is open on both sides in the vertical direction. The lower end of the outer cylinder portion 60 is inserted into the interior of the middle cylinder portion 21b of the first cylinder portion 20. The upper end of the outer cylinder portion 60 is inserted between the peripheral wall 32 of the second cylinder portion 30 and the hanging cylinder portion 35. The outer cylinder portion 60 comprises an outer cylinder body portion 61, a first piston portion 62, and a second piston portion 63.

[0039] The outer cylinder body portion 61 is cylindrical in shape and extends vertically. The upper end of the outer cylinder body portion 61 is inserted between the peripheral wall 32 of the second cylinder portion 30 and the hanging cylinder portion 35. A gap extending vertically is formed between the outer cylinder body portion 61 and the hanging cylinder portion 35. This gap connects the space between the top wall 31 of the second cylinder portion 30 and the upper end edge of the outer cylinder body portion 61, and the space below the hanging cylinder portion 35.

[0040] The first piston portion 62 is located inside the first cylinder portion 20. The first piston portion 62 protrudes downward from the lower end of the outer cylinder body portion 61. The first piston portion 62 extends radially outward as it extends downward. The first piston portion 62 is cylindrical, arranged coaxially with the container axis O, and opens downward. The outer circumferential surface of the lower end of the first piston portion 62 is in close contact with the inner circumferential surface of the middle cylinder portion 21b of the first cylinder portion 20 over its entire circumference. The first piston portion 62 is slidably positioned vertically inside the first cylinder portion 20.

[0041] The second piston portion 63 is inserted inside the second cylinder portion 30. The second piston portion 63 protrudes radially outward from the upper end of the outer cylinder body portion 61. The second piston portion 63 is cylindrical, arranged coaxially with the container axis O, and opening on both the vertical and horizontal sides. The vertical central portion of the second piston portion 63 is connected to the outer circumferential surface of the upper end of the outer cylinder body portion 61. The upper portion of the second piston portion 63 extends radially outward as it moves upward. The lower portion of the second piston portion 63 extends radially outward as it moves downward. The outer circumferential surface at the upper end of the second piston portion 63 and the outer circumferential surface at the lower end of the second piston portion 63 are in close contact with the inner circumferential surface of the peripheral wall 32 of the second cylinder portion 30 over their entire circumference. The second piston portion 63 is slidably arranged vertically inside the peripheral wall 32 of the second cylinder portion 30. The surface area of ​​the second piston portion 63 that receives pressure within the second cylinder portion 30 is larger than the surface area of ​​the first piston portion 62 that receives pressure within the first cylinder portion 20.

[0042] The inner cylinder portion 70 is a top-ended cylindrical shape extending in the vertical direction. The inner cylinder portion 70 is arranged coaxially with the container axis O. 70 is open downwards. The lower end of the inner cylinder portion 70 is inserted into the interior of the first cylinder portion 20. The upper end of the inner cylinder portion 70 is inserted into the interior of the hanging cylinder portion 35 of the second cylinder portion 30. The inner cylinder portion 70 has an inner cylinder body portion 71 and a pressure accumulator valve portion 72.

[0043] The inner cylinder body portion 71 is positioned inside the outer cylinder body portion 61. The inner cylinder body portion 71 has a radial gap around its entire circumference relative to the outer cylinder body portion 61. The inner cylinder body portion 71 is fixed to the outer cylinder body portion 61 via a connecting portion 75. The lower end of the inner cylinder body portion 71 is inside the outer cylinder body portion 61. The upper end of the inner cylinder body portion 71 is inserted into the hanging cylinder portion 35 of the second cylinder portion 30. A gap extending in the vertical direction is formed between the inner cylinder body portion 71 and the hanging cylinder portion 35. This gap connects the space between the top wall 31 of the second cylinder portion 30 and the top wall portion of the inner cylinder portion 70, and the space below the hanging cylinder portion 35.

[0044] The pressure accumulator valve section 72 is the top wall of the inner cylinder section 70. The pressure accumulator valve section 72 is arranged coaxially with the container axis O and is substantially convex upwards. The outer diameter at the upper end of the pressure accumulator valve section 72 is smaller than the inner diameter of the through hole 33 provided in the second cylinder section 30. The outer diameter at the lower end of the pressure accumulator valve section 72 is larger than the inner diameter of the through hole 33 provided in the second cylinder section 30. The pressure accumulator valve section 72 is inserted into the through hole 33 from below and closes the through hole 33. When the through hole 33 is closed by the pressure accumulator valve section 72, communication between the inside of the second cylinder section 30 and the discharge hole 48 is blocked. When the pressure accumulator valve section 72 moves away below the through hole 33, the through hole 33 is opened and communication between the inside of the second cylinder section 30 and the discharge hole 48 is restored. In this way, the pressure accumulator valve 72 can open and close the space between the inside of the second cylinder section 30 and the discharge hole 48.

[0045] The pressure accumulator valve section 72 is provided with a communication hole 73 that penetrates the pressure accumulator valve section 72 in the vertical direction. The communication hole 73 connects the inside of the inner cylinder section 70 to the outside of the inner cylinder section 70. The communication hole 73 is arranged coaxially with the container axis O and penetrates the radial center of the pressure accumulator valve section 72, that is, the upper end of the pressure accumulator valve section 72, in the vertical direction. The communication hole 73 connects the inside of the inner cylinder section 70 to the discharge hole 48 via a through hole 33 provided in the second cylinder section 30 and a nozzle through hole 45. In other words, the communication hole 73 connects the inside of the movable section 50 to the discharge hole 48.

[0046] The inner cylinder portion 70 is provided with a sealing projection 74 that protrudes radially inward from the inner circumferential surface of the inner cylinder portion 70, i.e., from the inner circumferential surface of the movable portion 50. The sealing projection 74 extends continuously along its entire circumferential direction.

[0047] The connecting portion 75 is positioned between the outer cylinder body portion 61 and the inner cylinder body portion 71. The connecting portion 75 is connected to the inner circumferential surface of the outer cylinder body portion 61 and to the outer circumferential surface of the inner cylinder body portion 71. In this way, the connecting portion 75 fixes the outer cylinder portion 60 and the inner cylinder portion 70 to each other. The connecting portion 75 is connected below the upper ends of the outer cylinder body portion 61 and the inner cylinder body portion 71, and above the lower ends of the outer cylinder body portion 61 and the inner cylinder body portion 71. The connecting portion 75 faces the lower end edge of the hanging cylinder portion 35 of the second cylinder portion 30 in the vertical direction. The upper end edge of the connecting portion 75 has a vertical gap with respect to the lower end edge of the hanging cylinder portion 35. The connecting portion 75 has a through portion 76 that penetrates in the vertical direction.

[0048] The movable part 50 is provided with a communication passage section 51 that connects the interior of the first cylinder section 20 and the interior of the second cylinder section 30. More specifically, the communication passage section 51 connects the part of the interior of the first cylinder section 20 located below the first piston section 62 and the part of the interior of the second cylinder section 30 located above the second piston section 63. The communication passage section 51 is the space sandwiched between the outer cylinder body section 61 and the inner cylinder body section 71. More specifically, the communication passage section 51 is the portion extending from between the lower end of the outer cylinder body section 61 and the lower end of the inner cylinder body section 71 to between the upper end of the outer cylinder body section 61 and the upper end of the inner cylinder body section 71, and includes a through-hole 76 formed in the connecting section 75. The communication passage section 51 opens upward through the gap between the upper end of the outer cylinder body section 61 and the upper end of the inner cylinder body section 71 and communicates with the interior of the second cylinder section 30. The communication channel section 51 opens downward through the gap between the lower end of the outer cylinder body section 61 and the lower end of the inner cylinder body section 71, and communicates with the interior of the first cylinder section 20. In this embodiment, the hanging cylinder section 35 is inserted into the communication channel section 51 from above. Since the hanging cylinder section 35 forms a gap extending vertically between the outer cylinder body section 61 and the inner cylinder body section 71, the interior of the first cylinder section 20 communicates with the through hole 33 through the space radially outside the hanging cylinder section 35, the space below it, and the space radially inside the communication channel section 51.

[0049] The columnar portion 80 comprises a cylindrical column body 81 extending vertically and a plurality of leg portions 86 projecting radially outward from the column body 81. The column body 81 is arranged coaxially with the container axis O. The column body 81 is inserted into the inner cylinder portion 70 of the movable portion 50 so as to be vertically movable. The upper end of the column body 81 is located above the seal projection 74. The upper end of the column body 81 is located separately below the pressure accumulator valve portion 72. The column body 81 projects downward from the inner cylinder portion 70. The lower end of the column body 81 is located inside the lower cylinder portion 21a of the first cylinder portion 20. The column body 81 comprises an upper portion 82 extending vertically with a constant outer diameter, a reduced diameter portion 83 adjacent to the lower part of the upper portion 82, and a lower portion 84 adjacent to the lower part of the reduced diameter portion 83.

[0050] The upper part 82 extends downward from near the upper end of the columnar part 80. The entire upper part 82 is located inside the movable part 50, i.e., inside the inner cylinder part 70. The outer circumferential surface of the upper part 82 is in close contact with the sealing projection 74 over its entire circumferential direction. The close contact of the sealing projection 74 with the outer circumferential surface of the upper part 82 seals the radial space between the inner circumferential surface of the movable part 50 and the outer circumferential surface of the columnar part 80 over its entire circumferential direction. The upper part 82 has a radial gap with respect to the inner circumferential surface of the inner cylinder part 70 on both the upper and lower sides of the sealing projection 74.

[0051] The outer diameter of the reduced-diameter portion 83 is smaller than the outer diameter of the upper portion 82. The lower portion 84 extends downward from inside the inner cylinder portion 70 and protrudes downward from the lower end opening of the inner cylinder portion 70. The outer diameter of the lower portion 84 is larger than the outer diameter of the reduced-diameter portion 83 and gradually increases as it extends downward. Because the reduced-diameter portion 83 is formed between the upper portion 82 and the lower portion 84, an annular recess 85 is formed on the outer circumferential surface of the columnar portion 80, which is recessed radially inward and extends along the entire circumference. The lower portion 84 has a radial gap with respect to the inner circumferential surface of the inner cylinder portion 70, and as the movable portion 50 moves downward relative to the columnar portion 80, it slides against the inner circumferential surface of the lower end of the inner cylinder portion 70 along its entire circumference.

[0052] Multiple leg portions 86 protrude radially outward from the lower end of the column body 81. The multiple leg portions 86 are arranged at intervals from each other along the circumferential direction. The multiple leg portions 86 are fitted into the lower cylindrical portion 21a of the first cylinder portion 20 in a manner that allows them to move up and down. Each leg portion 86 is positioned to move up and down between a pair of adjacent regulating protrusions 26. Each leg portion has a circumferential gap with respect to adjacent regulating protrusions 26.

[0053] A biasing member 89 is externally fitted to the columnar portion 80. The biasing member 89 is a coil spring extending in the vertical direction. The biasing member 89 is housed inside the first cylinder portion 20. The lower end of the biasing member 89 contacts the upper edges of the multiple regulating protrusions 26 from above. The upper end of the biasing member 89 contacts the movable portion 50 from below, applying an upward elastic force to the movable portion 50. The biasing member 89 also applies an upward elastic force to the second cylinder portion 30 and the head portion 40 via the movable portion 50. As a result, the movable portion 50, the second cylinder portion 30, and the head portion 40 are biased upward by the biasing member 89. In this embodiment, the upper end of the biasing member 89 is inserted between the inner cylinder portion 70 and the outer cylinder portion 60 of the movable portion 50 and contacts the connecting portion 75 from below.

[0054] The check valve section 90 is located inside the first cylinder section 20. The check valve section 90 comprises a valve body 91 formed at the lower end of the column body 81 and a fitted valve seat 92 formed in the lower cylindrical section 21a of the peripheral wall section 21 of the first cylinder section 20. The fitted valve seat 92 is located on the periphery of the through hole 25 in the bottom wall of the lower cylindrical section 21a. The fitted valve seat 92 protrudes upward from the bottom wall of the lower cylindrical section 21a. The fitted valve seat 92 is cylindrical and is arranged coaxially with the container axis O. The valve body 91 is formed in a cylindrical shape coaxial with the container axis O. The valve body 91 opens downward. The lower end opening edge of the valve body 91 is set upward from the bottom wall of the lower cylindrical section 21a. The valve body 91 has a gap with respect to the fitted valve seat 92. The valve body 91 is fitted radially outward of the fitting valve seat 92 by the downward movement of the columnar portion 80, forming a sealing surface between it and the fitting valve seat 92. The check valve portion 90 restricts communication between the inside of the first cylinder portion 20 and the inside of the container body 2 by the valve body 91 being fitted onto the fitting valve seat 92. The check valve portion 90 allows communication between the inside of the first cylinder portion 20 and the inside of the container body 2 by the valve body 91 moving away from the fitting valve seat 92. In other words, the check valve portion 90 allows the flow of contents from the inside of the container body 2 to the inside of the first cylinder portion 20, and blocks the flow of contents from the inside of the first cylinder portion 20 to the inside of the container body 2.

[0055] Next, the operation of the discharger 4 in this embodiment will be described. As shown in Figure 2, when the head portion 40 is pushed downward against the elastic force of the biasing member 89, the second cylinder portion 30 and the movable portion 50 are pushed down together with the head portion 40. As the movable portion 50 moves downward, the columnar portion 80 also moves downward due to frictional engagement between the sealing projection 74 of the inner cylinder portion 70 of the movable portion 50 and the outer circumferential surface of the columnar body 81 of the columnar portion 80. As the columnar portion 80 moves downward, the valve body 91 of the check valve portion 90 fits into the fitting valve seat 92, and the check valve portion 90 blocks communication between the inside of the first cylinder portion 20 and the inside of the container body 2.

[0056] When the first piston portion 62 of the movable portion 50 moves downward, the volume of the portion of the first cylinder portion 20 located between the first piston portion 62 and the check valve portion 90 decreases. The check valve portion 90 is in a closed state. As a result, the inside of the first cylinder portion 20 is pressurized, and the internal pressure of the first cylinder portion 20 increases. When the internal pressure of the first cylinder portion 20 increases, the inside of the second cylinder portion 30, which is connected to the inside of the first cylinder portion 20 via the communication passage portion 51, is pressurized.

[0057] Here, when the head portion 40 is pushed down, the internal pressure of the first cylinder portion 20 and the internal pressure of the second cylinder portion 30 become the same. However, since the pressure-receiving area of ​​the second piston portion 63 is larger than that of the first piston portion 62, the downward force that the movable portion 50 receives from the contents inside the second cylinder portion 30 is greater than the upward force that the movable portion 50 receives from the contents inside the first cylinder portion 20. Therefore, when the insides of the first cylinder portion 20 and the second cylinder portion 30 are pressurized, the internal pressure of the second cylinder portion 30 causes the movable portion 50 to move downward relative to the second cylinder portion 30, against the elastic force of the biasing member 89. As a result, as shown in Figure 3, the pressure accumulator valve portion 72 separates below the through hole 33, and the through hole 33 is opened. Therefore, since the flow of contents through the through hole 33 is permitted, the contents contained inside the second cylinder section 30 flow around the lower part of the hanging cylinder section 35 towards the through hole 33, and the contents contained in the first cylinder section 20 flow through the communication flow path section 51 towards the through hole 33. The contents that have flowed towards the through hole 33 flow through the through hole 33 to the nozzle section 44 and are discharged from the discharge hole 48.

[0058] As the head portion 40 is further pushed down and the discharge of contents progresses, the movable portion 50 moves upward relative to the second cylinder portion 30 as the internal pressure of the first cylinder portion 20 and the second cylinder portion 30 decreases. As a result, the pressure accumulator valve portion 72 closes the through hole 25. At this time, residual pressure is generated inside the first cylinder portion 20.

[0059] As shown in Figure 4, when the head portion 40 is pushed all the way down and the second cylinder portion is in the lowered end position, the seal projection 74 provided on the movable portion 50 reaches a position where it is radially opposite to the recess 85 of the columnar portion 80. The recess 85 is radially opposite to the seal projection 74 when the head portion 40 is pushed down to the lower end position.

[0060] When the seal projection 74 is facing the recess 85 radially, the seal projection 74 is spaced radially outward from the outer circumferential surface of the columnar portion 80. As a result, the contents can flow up and down across the seal projection 74 between the inner circumferential surface of the movable portion 50 (inner cylinder portion 70) and the outer circumferential surface of the columnar portion 80. On the other hand, the outer circumferential surface of the columnar portion 80 slides against the inner circumferential surface of the lower end of the inner cylinder portion 70 over its entire circumference. If a residual pressure exceeding a predetermined level is generated inside the first cylinder portion 20, the contents of the first cylinder portion 20 enter the interior of the inner cylinder portion 70 by passing between the outer circumferential surface of the columnar portion 80 and the inner circumferential surface of the lower end of the inner cylinder portion 70. As a result, at least a portion of the contents inside the first cylinder portion 20 flows towards the communication hole portion 73 through the space between the seal projection 74 and the recess 85, then flows from the communication hole portion 73 to the discharge hole 48, and is discharged to the outside of the discharger 4 from the discharge hole 48.

[0061] In this way, the communication hole 73 connects the inside of the first cylinder portion 20 and the discharge hole 48 through the gap between the inner circumferential surface of the movable portion 50 and the outer circumferential surface of the columnar portion 80, when the sealing projection 74 is radially opposite to the recess 85 of the columnar portion 80. As a result, the residual pressure inside the first cylinder portion 20 is released to the outside of the discharge container 1 through the discharge hole 48 without being released into the container body 2. Therefore, the pressure inside the first cylinder portion 20 can be suitably reduced after the head portion 40 has been pushed down. As a result, when the head portion 40 is restored upward by the biasing member 89 after being pushed down to the lower end position, the inside of the first cylinder portion 20 can be suitably made into negative pressure. As a result, the contents inside the container body 2 can be suitably sucked into the first cylinder portion 20 via the suction cylinder 24. Therefore, even when the head portion 40 is pushed down again, the contents can be suitably discharged. Furthermore, by reducing the pressure inside the first cylinder section 20 and releasing the pressurized state inside the first cylinder section 20, it is possible to suppress the contents from dripping out of the discharge hole 48. In other words, it is possible to suppress liquid dripping from the discharge hole 48 and obtain a dispenser 4 with good liquid drainage. By preventing the contents from escaping into the container body 2 when the head section 40 is pushed down to the lower end position, the discharge volume can be stabilized.

[0062] As described above, according to the discharger 4 of this embodiment, when the second cylinder section 30 is moved downward by pressing down the head section 40 and just before the discharge of the contents is completed, the pressure accumulator valve section 72 is in a closed state, and residual pressure is generated inside the first cylinder section 20 which is connected to the inside of the second cylinder section 30. In this case, the seal protrusion 74 and recess 85 face each other, allowing the residual pressure inside the first cylinder section 20 to be released through the gap between the inner circumferential surface of the movable section 50 and the outer circumferential surface of the columnar section 80, and through the communication hole section 73. This allows the residual pressure inside the first cylinder section 20 to be released when the discharge of the contents is completed, and unlike a configuration in which the residual pressure inside the cylinder is released into the container body, even if the internal pressure of the first cylinder section 20 rises rapidly due to a rapid pressing operation of the discharger, the internal pressure does not escape into the container body 2, so that a specified amount of contents can be discharged.Therefore, in a discharger 4 that can release the residual pressure inside the cylinder when the discharge of contents is completed, the discharge amount can be stabilized.

[0063] The check valve section 90 has a valve body 91 formed at the lower end of the columnar section 80. With this configuration, the valve body 91 can be formed integrally with the columnar section 80, so compared to a configuration in which a ball valve or the like is provided separately from the columnar section, it is possible to reduce the number of parts and reduce manufacturing costs by reducing assembly man-hours.

[0064] The check valve section 90 is provided in the first cylinder section 20 and has a fitted valve seat 92 that can be fitted onto the valve body 91. With this configuration, it is easy to maintain a sealed state (closed state) in the check valve section 90. For example, if the columnar section is made of a soft material (such as high-density polyethylene), the seal is likely to break without fitting, whereas in this embodiment, the function of the check valve section 90 can be stabilized regardless of the material used to form the check valve section 90.

[0065] The movable part 50 comprises an outer cylinder 60 having a first piston part 62 and a second piston part 63, and an inner cylinder 70 disposed inside the outer cylinder 60, having a pressure accumulator valve part 72 and a sealing projection 74, and forming a communication passage 51 between itself and the outer cylinder 60. With this configuration, since the first piston part 62 and the second piston part 63 are provided on the same member, it is possible to avoid the formation of joint surfaces between multiple members in the communication passage, as would occur if the first piston part and the second piston part were provided on separate members. Therefore, the airtightness of the inside of the first cylinder part 20, the inside of the second cylinder part 30, and the communication passage 51 can be improved.

[0066] It should be noted that the present invention is not limited to the embodiments described above with reference to the drawings, and various modifications are conceivable within its technical scope. For example, in the above embodiment, the seal projection 74 is formed on the movable part 50 and the recess 85 is formed on the columnar part 80, but the configuration is not limited to this. That is, the seal projection may be formed on the columnar part, or the seal projection may be formed on the movable part.

[0067] Furthermore, in the above embodiment, the movable part 50 integrally includes the first piston part 62, the second piston part 63, and the pressure accumulating valve part 72, but the configuration of the movable part is not particularly limited. For example, the movable part may comprise the part having the second piston part and the part having the first piston part as two fixed members. Alternatively, the movable part may comprise the part having the second piston part and the part having the pressure accumulating valve part as two fixed members.

[0068] In the above embodiment, the valve body 91 of the check valve section 90 is formed on the columnar section 80, but the configuration is not limited to this. For example, the check valve section may include a ball valve, a disc valve, or the like.

[0069] In the above embodiment, the second cylinder portion 30 is composed of an inner cylinder member 36 and an outer cylinder member 37, but the second cylinder portion may be composed of a single member.

[0070] Furthermore, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, without departing from the spirit of the present invention. [Explanation of Symbols]

[0071] 2...Container body 3...Mouth 4...Discharger 20...First cylinder section 30...Second cylinder section 40...Head section 48...Discharge hole 50...Movable part 51...Communicating flow path section 60...Outer cylinder section 62...First piston section 63...Second piston section 70...Inner cylinder section 72...Pressure accumulation valve section 73...Communicating hole section 74...Seal protrusion 80...Columnar section 85...Recess 90...Check valve section 91...Valve body 92...Fitting valve seat

Claims

1. A dispensing device that is attached to the mouth of the container body in which the contents are contained, The first cylinder section has an interior that connects to the interior of the container body, A second cylinder portion is positioned above the first cylinder portion and is movable downward while biased upward, A cylindrical movable part is positioned between the first cylinder portion and the second cylinder portion in the vertical direction, is movable downward while biased upward, and has an opening at the bottom. A head portion having a discharge hole connected to the inside of the second cylinder portion, A columnar portion is inserted into the movable part so as to be able to move up and down, A check valve that allows the flow of the contents from the inside of the container body to the inside of the first cylinder and restricts the flow of the contents from the inside of the first cylinder to the inside of the container body, Equipped with, The aforementioned movable part is A first piston portion is slidably arranged in the vertical direction inside the first cylinder portion, A second piston portion is slidably arranged in the vertical direction inside the second cylinder portion, A communication channel connecting the inside of the first cylinder section and the inside of the second cylinder section, A pressure accumulator valve that can open and close the space between the inside of the second cylinder and the discharge hole, It has, The pressure accumulating valve section is provided with a communication hole that connects the inside of the movable section with the discharge hole. An annular sealing projection is provided on one of the inner circumferential surface of the movable part and the outer circumferential surface of the columnar part, projecting radially toward the other side and contacting the other side. The other side is provided with a recess that is recessed radially on the opposite side from the one side and located below the sealing protrusion, With the second cylinder portion in the lowered end position, the seal projection and the recess face each other in the radial direction. In a state where the seal projection faces the recess in the radial direction, the inside of the first cylinder portion and the discharge hole communicate through the gap between the inner circumferential surface of the movable portion and the outer circumferential surface of the columnar portion, and through the communication hole. Dispenser.

2. The check valve portion has a valve body formed at the lower end of the columnar portion. The discharger according to claim 1.

3. The check valve section is provided in the first cylinder section and has a fitting valve seat that can be fitted onto the valve body. The discharger according to claim 2.

4. The aforementioned movable part is The outer cylinder portion having the first piston portion and the second piston portion, An inner cylinder portion is disposed inside the outer cylinder portion and has the pressure accumulating valve portion, and one of the sealing protrusion and the recess, and forms the communication flow path portion with the outer cylinder portion, Equipped with, The discharger according to any one of claims 1 to 3.

Images