Synthetic resin discharger

Abstract

To reduce the number of components.SOLUTION: A synthetic resin discharger comprises a fitting cap 11, a push-down head 12, and a connection cylinder part 13. A first communication hole 24 for communicating the inside of a container body W with the inside of the connection cylinder part is formed on a top wall of the fitting cap. An elastically deformable suction valve 26 which blocks the first communication hole and the inside of the connection cylinder part so as to be communicatable with each other and a discharge valve 29 which blocks the discharge hole 14 and the inside of the connection cylinder part so as to be communicatable with each other are formed at the connection cylinder part 13. When the push-down head is pushed down to compressively deform the connection cylinder part in a vertical direction, the suction valve blocks a communication between the first communication hole and the inside of the connection cylinder part, and also, the discharge valve is elastically deformed to communicate the discharge hole with the inside of the connection cylinder part, and when the pushing down of the push-down head is released to restoratively deform the connection cylinder part, the suction valve is elastically deformed to communicate the first communication hole with the inside of the connection cylinder part, and also, the discharge valve blocks the communication between the discharge hole and the inside of the connection cylinder part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a dispenser made of synthetic resin. [Background technology]

[0002] Conventionally, dispensers made of synthetic resin that do not use metal parts in consideration of environmental issues and the like have been known (see, for example, Patent Document 1 below). This type of dispenser reduces the effort required for sorting disposal, is less likely to cause problems in recycling due to the mixing of different materials (metals), and has the advantage of being applicable to contents that are altered by metal or that alter metal, thereby increasing the choice of contents. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-111623 Summary of the Invention [Problem to be solved by the invention]

[0004] However, conventional dispensers have room for improvement in terms of reducing the number of parts.

[0005] The present invention provides a dispenser made of synthetic resin that can reduce the number of parts. [Means for solving the problem]

[0006] A synthetic resin dispenser according to one aspect of the present invention comprises a cylindrical attachment cap with a top that is attached to the mouth of a container body; a push-down head that is formed with a discharge hole for the contents and is disposed above the top wall of the attachment cap so as to be movable downward; and an elastically deformable connecting tube portion that extends vertically and connects the top wall of the attachment cap and the push-down head. The top wall of the attachment cap is formed with a first communication hole that connects the inside of the container body with the inside of the connecting tube portion, and the connecting tube portion has an elastically deformable suction valve that blocks communication between the first communication hole and the inside of the connecting tube portion, and and an elastically deformable discharge valve that blocks communication between the discharge hole and the inside of the connecting tubular portion, and when the push-down head is pressed down to compress and deform the connecting tubular portion in the vertical direction, the suction valve blocks communication between the first communication hole and the inside of the connecting tubular portion, and the discharge valve elastically deforms to connect the discharge hole and the inside of the connecting tubular portion, and when the push-down head is released and the connecting tubular portion is deformed to its original state, the suction valve elastically deforms to connect the first communication hole and the inside of the connecting tubular portion, and the discharge valve blocks communication between the discharge hole and the inside of the connecting tubular portion.

[0007] When the depression head is pressed down to compress and deform the connecting tube portion in the vertical direction and increase the internal pressure of the connecting tube portion, the suction valve blocks communication between the first communicating hole and the inside of the connecting tube portion, and the discharge valve elastically deforms to connect the discharge hole and the inside of the connecting tube portion, so that the contents inside the connecting tube portion are discharged to the outside through the discharge hole without being returned to the container body through the first communicating hole. When the pressing head is released to restore and deform the connecting tubular portion and reduce the pressure inside the connecting tubular portion, the suction valve elastically deforms to connect the first communicating hole to the inside of the connecting tubular portion, and the discharge valve blocks communication between the discharge hole and the inside of the connecting tubular portion, so that the contents inside the container body are supplied into the connecting tubular portion through the first communicating hole. In this way, when the connecting tube portion is compressed and deformed in the vertical direction, the contents inside the connecting tube portion are discharged to the outside through the discharge hole, and when the connecting tube portion is restored and deformed, the contents inside the container body are supplied into the connecting tube portion through the first communicating hole.As a result, the connecting tube portion also serves as the cylinder, piston, and biasing member that restores the piston upward, which make up a conventional dispenser, and since the connecting tube portion also has an intake valve and a discharge valve formed therein, the number of parts can be reduced.

[0008] A regulating shaft extending upward is provided on the top wall of the mounting cap, and a vertical hole extending in the vertical direction and communicating with the discharge hole is formed in the push-down head, and when the push-down head is pressed down, the upper end of the regulating shaft may abut against the upper end surface of the inner surface of the vertical hole.

[0009] When the push-down head is pressed down, the upper end of the regulating shaft provided on the top wall of the attachment cap abuts against the upper end surface of the inner surface of the vertical hole formed in the push-down head, thereby stabilizing the amount of pressure applied by the push-down head, i.e., the amount of content ejected, and also making it easy to adjust the amount of pressure applied by the push-down head.

[0010] A regulating shaft extending upward is provided on the top wall of the mounting cap, the discharge valve is formed in a cylindrical shape extending in the vertical direction and is formed to be able to expand and deform in diameter, the regulating shaft is fitted inside the discharge valve so that it can slide up and down, and the regulating shaft is formed with a regulating portion that regulates the expansion and deformation of the discharge valve, and when the pressing head is pressed down to compress and deform the connecting cylindrical portion in the vertical direction, the discharge valve may move downward away from the regulating portion.

[0011] Since a regulating portion is formed on the regulating shaft to regulate the expansion and deformation of the cylindrically formed discharge valve, the expansion and deformation of the discharge valve is regulated by the regulating portion, and even if the internal pressure of the connecting cylindrical portion increases in a standby state, such as during distribution, the contents inside the connecting cylindrical portion can be prevented from being unintentionally discharged to the outside through the discharge hole. [Effects of the Invention]

[0012] According to the above aspect of the present invention, the number of parts can be reduced. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a longitudinal sectional view of a dispenser made of synthetic resin according to an embodiment of the present invention; [Figure 2] 2 is a diagram showing the dispenser of FIG. 1 in a state where a depression head is depressed. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a synthetic resin dispenser according to one embodiment will be described with reference to the drawings. 1, the dispenser 1 includes an attachment cap 11, a push-down head 12, and a connecting cylinder portion 13. The attachment cap 11, the push-down head 12, and the connecting cylinder portion 13 are made of a synthetic resin material. The mounting cap 11, the pressing head 12, and the connecting tubular portion 13 are each formed in a cylindrical shape with a top, and are arranged coaxially with a common axis.

[0015] Hereinafter, this common axis will be referred to as the central axis O, the side of the push-down head 12 along the central axis O will be referred to as the upper side, the side of the container body W along the central axis O will be referred to as the lower side, and the direction along the central axis O will be referred to as the up-down direction. The direction that intersects with the central axis O when viewed from the up-down direction will be referred to as the radial direction, and the direction that circles around the central axis O when viewed from the up-down direction will be referred to as the circumferential direction.

[0016] The attachment cap 11 is attached to the mouth of the container body W. The inner peripheral surface of the peripheral wall of the attachment cap 11 is formed with a female thread portion that can be screwed onto a male thread portion formed on the mouth of the container body W. The top wall of the attachment cap 11 is formed with a guide tube 21, an upper fitting tube 22, a lower fitting tube 23, a first communication hole 24, and an outside air introduction hole 25.

[0017] The guide tube 21 is disposed coaxially with the central axis O and extends upward from the top wall of the mounting cap 11. The upper fitting cylinder 22 extends upward from a portion of the top wall of the attachment cap 11 that is located radially inward of the guide cylinder 21. The upper fitting cylinder 22 is disposed coaxially with the central axis O. The upper end of the upper fitting cylinder 22 is located lower than the upper end of the guide cylinder 21. The lower fitting tube 23 extends downward from a portion of the top wall of the attachment cap 11 that is located radially inward from the guide tube 21. The central axis of the lower fitting tube 23 is radially spaced from the central axis O. The lower fitting tube 23 is inserted into the mouth of the container body W. The upper part of the pipe P is fitted into the lower fitting tube 23. The lower end of the pipe P is located within the bottom of the container body W. The first communication hole 24 passes through the top wall of the attachment cap 11 in the vertical direction, and communicates between the inside of the container body W and the inside of the connecting cylinder portion 13. The first communication hole 24 opens into the lower fitting cylinder 23 (pipe P). The outside air introduction hole 25 passes through the top wall of the attachment cap 11 in the vertical direction and opens into the container body W. The outside air introduction hole 25 is formed on the outer peripheral edge of the top wall of the attachment cap 11 in a portion that is located radially inward from the guide tube 21. The outside air introduction hole 25 is located radially outward from the first communication hole 24. The flow path cross-sectional area of ​​the outside air introduction hole 25 is smaller than the flow path cross-sectional area of ​​the first communication hole 24.

[0018] A restricting shaft 31 extending upward is provided on the top wall of the attachment cap 11. The restricting shaft 31 is disposed coaxially with the central axis O. Note that the restricting shaft 31 does not necessarily have to be provided, and may be formed integrally with the attachment cap 11. The lower part of the regulating shaft 31 is fitted and fixed in the upper fitting cylinder 22. The upper end of the regulating shaft 31 is located above the upper end of the guide cylinder 21. The upper end of the regulating shaft 31 has a larger outer diameter than the part located below the upper end. A groove-shaped regulating portion 32 is formed on the underside of the upper end of the regulating shaft 31, which is recessed upward and extends continuously around the entire circumference. The regulating shaft 31 is provided over the entire length in the vertical direction within the connecting cylinder portion 13. The upper end of the regulating shaft 31 is located above the top wall of the connecting cylinder portion 13.

[0019] The connecting tube portion 13 extends in the vertical direction, is formed to be elastically deformable, and connects the top wall of the attachment cap 11 and the press-down head 12. The connecting tube portion 13 is formed of, for example, rubber, elastomer, or the like. The peripheral wall of the connecting tube portion 13 extends radially inward and is narrowed toward the center in the vertical direction. The lower end opening edge 13b of the peripheral wall of the connecting tube portion 13 abuts over the entire circumference against a portion of the top wall of the attachment cap 11 that is located radially outward from the first communication hole 24 and radially inward from the outside air introduction hole 25. The connecting tubular portion 13 has a lower end portion of a peripheral wall formed with a suction valve 26 and an outside air introduction valve 27 .

[0020] The suction valve 26 is formed to be elastically deformable, and blocks communication between the first communication hole 24 and the inside of the connecting tubular portion 13. The suction valve 26 protrudes radially inward from the lower end of the peripheral wall of the connecting tubular portion 13 and is formed to be elastically deformable in the vertical direction. The suction valve 26 is formed in the shape of a flange that extends continuously over the entire length in the circumferential direction. The suction valve 26 closes the opening of the first communication hole 24 on the upper surface of the top wall of the attachment cap 11.

[0021] The outside air introduction valve 27 blocks communication between the outside and the inside of the container body W, and connects the outside and the inside of the container body W when the pressure inside the container body W is reduced. The outside air introduction valve 27 extends downward and radially outward from a portion of the lower end of the peripheral wall of the connecting tube portion 13 that is located above the connecting portion with the suction valve 26. The outside air introduction valve 27 is formed in a cylindrical shape that extends continuously over the entire length in the circumferential direction. The outside air introduction valve 27 is formed to be elastically deformable in the radial direction. The outside air introduction valve 27 abuts against the inner circumferential surface of the lower end of the guide tube 21 so as to be able to be separated radially inward. The outside air introduction valve 27 is spaced above the upper surface of the top wall of the attachment cap 11.

[0022] An outside air introduction hole 25 opens into an annular space X surrounded by the inner peripheral surface of the outside air introduction valve 27, the outer peripheral surface of the peripheral wall of the connecting cylindrical portion 13, and the upper surface of the top wall of the mounting cap 11.

[0023] The top wall of the connecting tubular portion 13 is formed with a discharge valve 29 which is elastically deformable and which shuts off communication between the discharge hole 14 of the press-down head 12 and the inside of the connecting tubular portion 13 . Here, a second communication hole 28 that can communicate between the discharge hole 14 and the inside of the connecting cylindrical portion 13 is formed in the top wall of the connecting cylindrical portion 13. The second communication hole 28 is arranged coaxially with the central axis O. The discharge valve 29 is formed in a cylindrical shape extending in the vertical direction and is formed to be capable of expanding in diameter (elastic deformation). The discharge valve 29 extends upward from the periphery of the opening of the second communication hole 28 on the upper surface of the top wall of the connecting cylindrical portion 13. The discharge valve 29 extends radially inward as it extends upward. A restricting shaft 31 is fitted inside the discharge valve 29 so as to be able to slide up and down. The discharge valve 29 is inserted into a groove-shaped restricting portion 32 formed in the restricting shaft 31. This restricts the discharge valve 29 from expanding in diameter. As shown in FIG. 2 , when the pressing head 12 is pressed down to compress and deform the connecting cylindrical portion 13 in the vertical direction, the discharge valve 29 moves downward away from the restricting portion 32. This allows the discharge valve 29 to be expandable in diameter. An annular groove 13a is formed in the upper surface of the top wall of the connecting cylindrical portion 13 in a portion positioned radially outward from the second communicating hole 28. The annular groove 13a is disposed coaxially with the central axis O.

[0024] In the illustrated example, the upper surface of the top wall of the connecting cylindrical portion 13 has an annular inner peripheral portion located radially inward from the annular groove 13a, the inner side of which is the above-mentioned second communication hole 28, which protrudes upward from the outer peripheral portion located radially outward from the annular groove 13a, and has a cylindrical shape extending in the vertical direction. Note that the upper surfaces of the top wall of the connecting cylindrical portion 13 may be located at the same vertical position on both the inner peripheral portion and the outer peripheral portion.

[0025] The press-down head 12 is provided above the top wall of the attachment cap 11 so as to be movable downward. The lower end of the peripheral wall 15 of the press-down head 12 is fitted into and fixed to the annular groove 13a of the connecting tubular portion 13. As a result, the upper end opening of the second communication hole 28, the discharge valve 29, and the upper part of the regulating shaft 31 in the connecting tubular portion 13 are positioned above the edge of the lower end opening of the peripheral wall 15 of the press-down head 12 and are inserted into the peripheral wall 15 of the press-down head 12. A plurality of ribs 12a, which protrude radially outward and have their front and back surfaces facing the circumferential direction, are formed at intervals around the periphery on the outer peripheral surface of the peripheral wall 15 of the press-down head 12. The lower end surfaces of the ribs 12a abut against the outer peripheral edge of the upper surface of the top wall of the connecting tubular portion 13. The press-down head 12 has an outer cylinder 12b that radially surrounds the peripheral wall 15. The outer cylinder 12b is fitted to the guide cylinder 21 of the mounting cap 11 so as to be movable downward while being restricted from moving further upward from the uppermost position. The press-down head 12 is formed with a nozzle tube 12c that extends radially outward from the peripheral wall 15 and protrudes radially outward from the outer tube 12b. The interior of the nozzle tube 12c is in communication with the interior of the peripheral wall 15 of the press-down head 12.

[0026] The presser head 12 is formed with a vertical hole 33 and a horizontal hole 34. The vertical hole 33 is located inside the peripheral wall 15 of the presser head 12, and the horizontal hole 34 is located inside the nozzle cylinder 12c. The vertical hole 33 extends in the vertical direction and is disposed coaxially with the central axis O. The horizontal hole 34 extends radially outward from the upper end of the vertical hole 33. The opening at the tip of the horizontal hole 34 serves as the discharge hole 14. The discharge hole 14 and the interior of the connecting tube portion 13 are in communication with each other through the horizontal hole 34, the vertical hole 33, and the second communication hole 28.

[0027] Next, the operation of the dispenser 1 will be described.

[0028] As shown in Figure 2, when the pressing head 12 is pressed down to compress and deform the connecting tubular portion 13 in the vertical direction, the internal pressure of the connecting tubular portion 13 increases, and the suction valve 26 is pressed against the upper surface of the top wall of the mounting cap 11, thereby blocking communication between the first communicating hole 24 and the inside of the connecting tubular portion 13. As the connecting tubular portion 13 undergoes compressive deformation in the vertical direction, the discharge valve 29 slides downward on the outer circumferential surface of the restricting shaft 31, moving downward away from the restricting portion 32, and undergoes diameter expansion (elastic deformation) as the internal pressure of the connecting tubular portion 13 increases, moving away from the outer circumferential surface of the restricting shaft 31. As a result, the inside of the connecting tubular portion 13 communicates with the discharge hole 14 through the second communication hole 28, the inside of the discharge valve 29, the vertical hole 33, and the horizontal hole 34. As described above, when the connecting tubular portion 13 is compressed and deformed in the vertical direction, the content in the connecting tubular portion 13 is discharged to the outside through the discharge hole 14 without being returned to the container body W through the first communication hole 24.

[0029] When the press-down head 12 is pressed down, the upper end of the regulating shaft 31 abuts against the upper end surface of the inner surface of the vertical hole 33. This prevents the press-down head 12 from being pressed down any further. Because the peripheral wall of the connecting tubular portion 13 is constricted, extending radially inward as it approaches the center in the vertical direction, when the connecting tubular portion 13 is compressed and deformed in the vertical direction, it bends and deforms starting from the vertical center of the peripheral wall. At this time, the inner peripheral surface of the peripheral wall of the connecting tubular portion 13 is spaced radially outward from the outer peripheral surfaces of the upper fitting tube 22 and the regulating shaft 31. Following this deformation of the peripheral wall of the connecting tubular portion 13, the outside air introduction valve 27 is pressed against the inner peripheral surface of the lower end of the guide tube 21, blocking communication between the outside air introduction hole 25 and the outside.

[0030] Next, when the pressing head 12 is released, the discharge valve 29 slides upward on the outer circumferential surface of the restricting shaft 31, and the connecting tubular portion 13 is restored and deformed as shown in Fig. 1. This reduces the pressure inside the connecting tubular portion 13, and the suction valve 26 elastically deforms so as to move upward away from the upper surface of the top wall of the attachment cap 11, thereby connecting the inside of the connecting tubular portion 13 to the inside of the container body W through the first communication hole 24. When the pressure inside the connecting tubular portion 13 is reduced, the discharge valve 29 is pressed against the outer circumferential surface of the restricting shaft 31, and communication between the inside of the connecting tubular portion 13 and the discharge hole 14 is blocked. As a result, when the connecting tubular portion 13 is restored to its original shape, the contents in the container body W are supplied into the connecting tubular portion 13 through the first communication hole 24.

[0031] As the contents in the container body W are supplied into the connecting tube portion 13, the pressure inside the container body W decreases, and negative pressure is created in the annular space X surrounded by the outer surface of the lower end of the peripheral wall of the connecting tube portion 13, the upper surface of the top wall of the attachment cap 11, and the inner circumferential surface of the outside air introduction valve 27, causing the outside air introduction valve 27 to elastically deform radially inward and move away from the inner circumferential surface of the lower end of the guide tube 21. As a result, outside air flows into the container body W through the outside air introduction hole 25.

[0032] As described above, in the synthetic resin dispenser 1 of this embodiment, when the connecting tubular portion 13 is compressed and deformed in the vertical direction, the contents inside the connecting tubular portion 13 are discharged to the outside through the discharge hole 14, and when the connecting tubular portion 13 is restored and deformed, the contents inside the container body W are supplied into the connecting tubular portion 13 through the first communicating hole 24. Therefore, the connecting tubular portion 13 also serves as the cylinder, piston, and biasing member that restores the piston upward, which constitute a conventional dispenser, and further, the connecting tubular portion 13 is also formed with the suction valve 26 and discharge valve 29, making it possible to reduce the number of parts.

[0033] When the push-down head 12 is pressed down, the upper end of the regulating shaft 31 provided on the top wall of the attachment cap 11 abuts against the upper end surface of the inner surface of the vertical hole 33 formed in the push-down head 12, so that the amount of pressing down of the push-down head 12, i.e., the amount of content ejected, can be stabilized and the amount of pressing down of the push-down head 12 can be easily adjusted.

[0034] The regulating shaft 31 is formed with a regulating portion 32 that regulates the expansion and deformation of the cylindrically formed discharge valve 29. Therefore, the expansion and deformation of the discharge valve 29 is regulated by the regulating portion 32, and even if the internal pressure of the connecting tubular portion 13 increases during standby, such as during distribution, the contents in the connecting tubular portion 13 can be prevented from being unintentionally discharged to the outside through the discharge hole 14.

[0035] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0036] The upper end of the regulation shaft 31 may be located below the upper end surface of the inner surface of the vertical hole 33 when the press-down head 12 is pressed down. The upper end of the regulating shaft 31 may be located below the top wall of the connecting tubular portion 13. The regulating portion 32 does not have to be formed on the regulating shaft 31.

[0037] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and the above-described variations may be combined as appropriate. [Explanation of symbols]

[0038] 1 Dispenser 11 Mounting cap 12 Depressor head 13 Connecting cylinder part 14 Discharge hole 24 1st communication hole 26 Suction valve 29 Discharge valve 31 Regulatory Axis 32 Regulatory Department 33 Vertical hole W container body

Claims

1. a cylindrical cap with a top attached to the opening of the container body; a push-down head having a discharge hole for the contents formed therein and disposed above the top wall of the attachment cap so as to be movable downward; a connecting tube portion that extends in the vertical direction and is elastically deformable and connects the top wall of the attachment cap and the press-down head; a first communication hole that communicates between the inside of the container body and the inside of the connecting cylindrical portion is formed in the top wall of the attachment cap; The connecting tube portion has an elastically deformable intake valve that blocks communication between the first communication hole and the inside of the connecting cylindrical portion; an elastically deformable discharge valve that blocks communication between the discharge hole and the inside of the connecting cylindrical portion, When the pressing head is pressed down to compress and deform the connecting tube portion in the vertical direction, the suction valve blocks communication between the first communication hole and the inside of the connecting cylindrical portion, and the discharge valve elastically deforms to connect the discharge hole and the inside of the connecting cylindrical portion, When the pressing of the pressing head is released and the connecting tube portion is restored and deformed, A synthetic resin discharge device in which the suction valve elastically deforms to connect the first communication hole to the inside of the connecting tubular portion, and the discharge valve blocks communication between the discharge hole and the inside of the connecting tubular portion.

2. A restricting shaft extending upward is provided on the top wall of the attachment cap, The press-down head has a vertical hole extending in a vertical direction and communicating with the discharge hole, 2. The synthetic resin dispenser according to claim 1, wherein an upper end of the regulating shaft abuts against an upper end surface of the inner surface of the vertical hole when the depression head is depressed.

3. A restricting shaft extending upward is provided on the top wall of the attachment cap, The discharge valve is formed in a cylindrical shape extending in the vertical direction and is formed to be expandable and deformable in diameter, The regulation shaft is fitted inside the discharge valve so as to be vertically slidable, The restricting shaft is formed with a restricting portion that restricts the discharge valve from expanding and deforming, 3. The synthetic resin dispenser according to claim 1, wherein when the depression head is depressed to compress and deform the connecting tube portion in the vertical direction, the discharge valve moves downwardly away from the restricting portion.

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