Dispenser

Abstract

To prevent a content from being unintentionally discharged by unexpected external force.SOLUTION: According to a discharger 1 comprising a push-down head 13 provided with protrusions 96, 97; an energization member 80 arranged in a more compressed state than natural length; and a regulating cylinder 22 which the push-down head is allowed to enter, that can be switched between a regulation position P1 and an allowable position at which downward movement is allowed, by rotation around a container axis O, vertical grooves 100, 101 where downward movement of a protrusion is allowed when the push-down head is an allowable position, and peripheral grooves 105, 106 where the protrusion is arranged when the push-down head is at the regulation position are formed in the regulating cylinder; a bottom wall face of each of the peripheral grooves is made to be a regulation wall; the protrusion rides over the regulation wall from the vertical grooves while pulling upward by bringing an inclined plane into contact with the regulation wall, along with rotation of the push-down head; and according to the energization member, compressibility at the time when the push-down head is located at the regulation position is smaller than compressibility at the time when the push-down head is located at the allowable position.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Conventionally, as shown in Patent Document 1 below, for example, there has been known a dispenser that includes a stem that is arranged inside the mouth of a container body in an upwardly biased state so as to be able to move downwards, a cylinder into which the stem is inserted, a piston that is linked to the up and down movement of the stem and is fitted within the cylinder so as to be able to slide up and down, and a push-down head that is attached to the upper end of the stem and has a nozzle hole for dispensing the contents. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-123927 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned dispenser, the contents can be dispensed by pressing the press head. However, for example, when an external force is suddenly applied to the press head during storage, the press head may be pressed down, resulting in the contents being unintentionally dispensed.

[0005] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a dispenser that can prevent unintended discharge of contents due to unexpected external force. [Means for solving the problem]

[0006] (1) A dispenser according to the present invention comprises a stem arranged inside the mouth of a container body that contains contents and movable downward in an upwardly biased state, a cylinder attached to the mouth of the container body via an attachment cap, a piston linked to the up and down movement of the stem and fitted inside the cylinder so as to be vertically slidable, a push-down head having a nozzle hole for dispensing the contents, attached to the upper end of the stem and rotatable about a container axis of the container body, a regulating tube into which the push-down head can enter, and a biasing member arranged in a compressed state relative to its natural length and biasing the stem upward, the push-down head being formed in a topped cylindrical shape having a head peripheral wall and being switchable by rotation about the container axis between a restricted position where downward movement is restricted and an allowed position where downward movement is allowed, the head peripheral wall being formed with a protrusion that protrudes radially outward and is located inside the regulating tube, the push-down head being positioned at the allowed position on an inner circumferential surface of the regulating tube, a vertical groove that allows downward movement of the protrusion when the press-down head is in the restricted position, and a circumferential groove that extends circumferentially and is connected to the vertical groove, and in which the protrusion is disposed when the press-down head is in the restricted position, a bottom wall surface of the circumferential groove serves as a restricting wall that contacts the protrusion from below and restricts the downward movement of the protrusion, a sloped surface that extends from the circumferential groove to the vertical groove as it moves from above to below is formed on a portion of the protrusion that faces the circumferential groove in the circumferential direction when the press-down head is in the permitted position, and the sloped surface extends from the circumferential groove to the vertical groove as it moves from above to below, and the protrusion rides up from the vertical groove onto the restricting wall as it is pulled upward as the press-down head rotates from the permitted position to the restricting position, and the compression rate of the biasing member when the press-down head is in the restricted position is smaller than the compression rate when the press-down head is in the permitted position due to the protrusion riding up onto the restricting wall.

[0007] According to the dispenser of the present invention, when the push-down head is in the restricted position, the protrusion rides up on the restricting wall, restricting the downward movement of the protrusion. This restricts the downward movement of the push-down head. Therefore, even if an unexpected external force acts on the push-down head, the push-down head will not be pushed down, and unintended ejection of the contents can be prevented.

[0008] When dispensing the contents, the press-down head is rotated around the container axis to move the press-down head from the restricted position to the permitted position. This allows the protrusion to move with the rotation of the press-down head, so that the protrusion can be moved from inside the circumferential groove to inside the vertical groove. This allows the restriction on the downward movement of the press-down head to be released, so that the downward movement of the press-down head can be permitted. Therefore, by pressing down the press-down head while elastically deforming the biasing member, the piston can be pressed down together with the stem, and the contents can be dispensed through the nozzle hole.

[0009] As described above, the push-down head cannot be depressed unless the push-down head is switched from the restricting position to the allowing position, so it is possible to prevent the contents from being unintentionally discharged due to unexpected external forces, for example, during product distribution, storage, etc. Furthermore, since the stem does not move downward unintentionally, it is also possible to prevent, for example, the sealing performance of the dispenser from being deteriorated and the contents from being exposed to the outside air.

[0010] In particular, when the pressing head is positioned at the restricting position, the protrusion can ride up on the restricting wall, so that the pressing head can be raised higher than when it is positioned at the permissible position. Therefore, the stem can be raised higher via the pressing head, so that the biasing member can be brought to a state close to its natural length. Therefore, the compression rate of the biasing member when the pressing head is positioned at the restricting position can be made smaller than the compression rate of the biasing member when the pressing head is positioned at the permissible position. Therefore, the burden on the urging member during product distribution, storage, etc. can be reduced, and the urging member can be prevented from becoming worn or losing its strength, etc. Therefore, even if the product is stored for a long period of time, the strength and quality of the urging member can be maintained, and the sealing performance of the dispenser can be stably maintained. Furthermore, since the protrusion is formed with an inclined surface, when the push-down head is rotated around the container axis from the permitted position to the restricted position, the inclined surface can be used to smoothly guide the protrusion onto the restricting wall, thereby allowing the push-down head to be rotated with little resistance, improving the operability of switching from the permitted position to the restricted position.

[0011] (2) A ring member having the protrusion formed thereon is combined with the head peripheral wall and is rotatable around the container axis relative to the head peripheral wall, and the head peripheral wall and the ring member may be combined while maintaining a predetermined rotational resistance.

[0012] In this case, since the head peripheral wall and the ring member are combined while maintaining a predetermined rotational resistance, the ring member on which the protrusions are formed can be rotated together with the rotation of the push-down head about the container axis, so that the push-down head can be switched between the restricting position and the allowing position in accordance with the rotation about the container axis. In addition, when the press-down head is positioned at the permissible position, for example, if the press-down head is further rotated in a direction from the restricted position toward the permissible position, the head peripheral wall rotates while the protrusion of the ring member contacts the vertical groove, so that a rotational force exceeding the rotational resistance can be applied to the head peripheral wall. Therefore, the head peripheral wall can continue to rotate without rotating the ring member. This allows the nozzle hole to be freely adjusted to face in any direction before pressing down the press-down head. Therefore, a dispenser that is easy to use and has excellent convenience can be obtained.

[0013] (3) The biasing member may be made of a synthetic resin material.

[0014] In this case, since the urging member is made of synthetic resin, it is possible to reduce the environmental impact and realize a dispenser in which, for example, all components are made of synthetic resin, which eliminates the need to separate the urging member from other components when disposing of the dispenser, making disposal easier for users. Furthermore, as mentioned above, since the urging member can be kept close to its natural length during product distribution, storage, etc., even if the urging member is made of synthetic resin, it is unlikely to become worn or lose strength, etc. Therefore, even if the urging member is made of synthetic resin, it can be stored for a long period of time and the sealing performance of the dispenser can be stably maintained.

[0015] (4) The biasing member may include a plurality of annular bodies arranged at intervals in the vertical direction, into which the stem is inserted, and a plurality of elastic spring portions that connect each of the plurality of annular bodies in the vertical direction, are arranged at intervals in the circumferential direction, and are elastically deformable in the vertical direction, and may bias the stem upward via the pressing head.

[0016] In this case, the biasing member is configured to connect multiple annular bodies in the vertical direction using multiple elastic spring portions that are spaced apart in the circumferential direction. Therefore, compared to, for example, a coil spring in which a wire is wound, twisting or distortion is less likely to occur, and it is easier to generate a stable biasing force (elastic force) over a long period of time. Effect of the Invention

[0017] According to the dispenser of the present invention, it is possible to prevent the content from being unintentionally dispensed due to an unexpected external force. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a first embodiment of a dispenser according to the present invention. [Diagram 2] 2 is a vertical cross-sectional view of the dispenser showing a state in which the press-down head has been moved from the restricting position shown in FIG. 1 to a permitted position. [Diagram 3]FIG. 3 is a cross-sectional view taken along the line AA shown in FIG. 2. [Figure 4] FIG. 4 is a vertical cross-sectional view taken along line BB shown in FIG. [Diagram 5] 5 is a vertical cross-sectional view showing a state in which the presser head is moved from the permitted position shown in FIG. 4 to a restricted position. [Figure 6] FIG. 2 is a side view of the urging member shown in FIG. [Figure 7] 3 is a vertical cross-sectional view of the dispenser showing a state in which the press-down head is pressed down from the state shown in FIG. 2. [Figure 8] FIG. 4 is a vertical sectional view showing a second embodiment of a dispenser according to the present invention. [Figure 9] FIG. 11 is a vertical sectional view showing a third embodiment of a dispenser according to the present invention. [Figure 10] 10 is a cross-sectional view of the dispenser taken along line CC shown in FIG. 9. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, a first embodiment of a dispenser according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the dispenser 1 of this embodiment comprises a pump module 11 having a stem 10, an attachment cap 12 that is attached to the mouth 3 of a container body 2 containing the contents and combines the pump module 11 with the mouth 3 of the container body 2, and a push-down head 13 attached to the stem 10. Unless otherwise specified, each component of the dispenser 1 is a molded product made of a synthetic resin material. Furthermore, the dispenser 1 may be provided with a cover cap that covers the press-down head 13 and the mounting cap 12.

[0020] The stem 10 and the mounting cap 12 are disposed coaxially with the container axis O of the container body 2. Hereinafter, the push-down head 13 side along the container axis O will be referred to as the upper side, and the container body 2 side will be referred to as the lower side, and the direction along the container axis O will be referred to as the up-down direction. Furthermore, in a plan view seen from the up-down direction, the direction intersecting the container axis O will be referred to as the radial direction, and the direction going around the container axis O will be referred to as the circumferential direction. Furthermore, among the circumferential directions, a direction going around the container axis O clockwise in a top view of the dispenser 1 is referred to as a first direction M1, and a direction going around the container axis O counterclockwise is referred to as a second direction M2.

[0021] (Container body) The container body 2 is formed in a bottomed cylindrical shape with a mouth 3, a shoulder (not shown), a body (not shown), and a bottom (not shown) that are connected in this order from above. A male screw portion 4 is formed on the outer peripheral surface of the mouth 3 of the outer container.

[0022] (Attachment cap) The mounting cap 12 comprises a mounting tube 20 that surrounds the mouth 3 of the container body 2 from the radial outside, a ring-shaped cap top wall 21 that protrudes radially inward from the upper end of the mounting tube 20, and a regulating tube 22 that extends upward from the cap top wall 21 and surrounds the stem 10 from the radial outside.

[0023] A female threaded portion 23 that screws into the male threaded portion 4 formed on the mouth portion 3 of the container body 2 is formed on the inner peripheral surface of the mounting tube 20. As a result, the mounting cap 12 is attached to the mouth portion 3 of the container body 2 by screwing the male threaded portion 4 and the female threaded portion 23 together through a screw connection. However, the method of attaching the attachment cap 12 is not limited to screwing, and it may be attached to the mouth portion 3 of the container body 2 by, for example, undercut fitting.

[0024] The cap top wall 21 is disposed on the upper opening edge of the mouth part 3 of the container body 2, sandwiching a packing 24 and a flange part 33 of a cylinder 30 described later. The stem 10 is inserted inside the cap top wall 21 so as to be movable up and down. The regulating tube 22 is formed in a cylindrical shape with an outer diameter smaller than that of the mounting tube 20. In the illustrated example, the regulating tube 22 extends upward from the cap top wall 21 so as to have a length approximately equal to the vertical length of the mounting tube 20.

[0025] (Pump module) The pump module 11 includes a cylinder 30, a lower valve body 40, a stem 10, a piston guide 50, a piston 60, a support cylinder 70, and a biasing member 80.

[0026] (Cylinder) The cylinder 30 is formed in a bottomed cylindrical shape having a cylinder peripheral wall 31 and an annular cylinder bottom wall 32, and is disposed coaxially with the container axis O. The cylinder peripheral wall 31 is formed with an outer diameter smaller than the inner diameter of the mouth 3 of the container body 2, and a predetermined gap is secured between the cylinder peripheral wall 31 and the mouth 3 of the container body 2. An annular flange portion 33 that protrudes radially outward is formed at the upper end of the cylinder peripheral wall 31. The flange portion 33 is disposed on the upper opening edge of the mouth 3 of the container body 2 via a packing 24, and is sandwiched in the vertical direction between the flange portion 3 and the upper opening edge of the mouth 3 by the mounting cap 12 that is attached to the mouth 3 of the container body 2.

[0027] As a result, the entire pump module 11 including the cylinder 30 is attached to the mouth 3 of the container body 2 via the mounting cap 12. The cylinder 30 extends downward beyond the mouth 3 of the container body 2 and is attached to the mouth 3 of the container body 2 via the mounting cap 12 so as to enter the inside of the container body 2. The cylinder peripheral wall 31 opens upward through the inside of the cap top wall 21. Thus, the stem 10 is inserted into the inside of the cylinder peripheral wall 31 from above.

[0028] The cylinder bottom wall 32 is formed with a flow hole 34 through which the contents flow. Furthermore, a connecting tube 35 extending downward is formed integrally with the inner peripheral edge of the cylinder bottom wall 32. The upper end of a pipe 36 for sucking up the contents is fitted into the inside of the connecting tube 35. In this way, the cylinder 30 and the pipe 36 are combined integrally. The lower end opening of the pipe 36 is located within the bottom of the container body 2.

[0029] (Lower valve body) The lower valve body 40 includes a cylindrical fitting member 41 with a top, a valve body 42, and a resilient arm 43 that is resiliently deformable. The fitting member 41 is fitted to the inside of the lower end of the cylinder peripheral wall 31. A communication hole (not shown) that passes through the top wall in the vertical direction is formed in the top wall of the fitting member 41. This allows the contents sucked up from the pipe 36 to be supplied into the cylinder 30 through the flow hole 34 and the communication hole. However, the fitting member 41 does not have to be formed in a cylindrical shape with a top, and may be formed in a ring shape that fits inside the cylinder peripheral wall 31, for example.

[0030] The valve body 42 is formed, for example, in a circular shape in a plan view, and is seated releasably on the cylinder peripheral wall 31 to releasably close the flow hole 34 . The elastic arms 43 integrally connect the valve body 42 and the cylindrical portion of the fitting member 41, and are formed, for example, in a plurality of positions spaced apart in the circumferential direction. As a result, the lower valve body 40 of this embodiment is a multi-point valve (for example, a three-point valve) having a plurality of elastic arms 43. The elastic arms 43 are formed to extend, for example, in the circumferential direction to ensure appropriate springiness, and have their inner ends connected to the outer edge of the valve body 42 and their outer ends connected to the tubular portion of the fitting member 41. Therefore, the valve body 42 is elastically displaceable in the vertical direction as the multiple elastic arms 43 elastically deform.

[0031] The lower valve body 40 configured in this manner functions as a check valve that maintains the flow hole 34 in a closed state when the inside of the cylinder 30 is pressurized, and opens the flow hole 34 when the inside of the cylinder 30 is depressurized. As a result, the lower valve body 40 prevents the contents in the cylinder 30 from flowing back into the container body 2 through the flow hole 34 when the inside of the cylinder 30 is pressurized, and allows the contents in the container body 2 to flow into the cylinder 30 through the flow hole 34 when the inside of the cylinder 30 is depressurized. However, the lower valve body 40 is not limited to the multi-point valve described above, and may have a valve structure other than the above configuration.

[0032] (Stem) The stem 10 is erected inside the mouth 3 of the container body 2 in an upwardly biased state so as to be movable downward. The stem 10 is formed in a cylindrical shape extending in the vertical direction, and is disposed inside the cap top wall 21 and inside the cylinder peripheral wall 31. The stem 10 is disposed so that, before the push-down head 13 is pressed down, the upper end protrudes above the regulating tube 22 of the attachment cap 12, and the lower end is accommodated within the cylinder 30. The lower end of the stem 10 is formed as an expanded diameter portion 10a that expands radially outward, so that the stem 10 is formed in a two-stage cylindrical shape whose outer diameter changes in the vertical direction.

[0033] (Piston guide) The piston guide 50 is disposed coaxially with the container axis O, and is disposed below the stem 10. The piston guide 50 includes a guide tube 51 formed in a cylindrical shape with a bottom, and an annular guide flange 52 protruding radially outward from the lower end of the guide tube 51.

[0034] The upper end of the guide tube 51 is fitted inside a portion of the stem 10 that is located above the enlarged diameter portion 10a. This allows the piston guide 50 to be combined integrally with the stem 10 and to move up and down together with the stem 10. The guide tube 51 is combined with the stem 10 such that the lower end is located below and away from the enlarged diameter portion 10a of the stem 10.

[0035] In a portion of the guide tube 51 that is located below the portion that fits inside the stem 10, a plurality of first through holes 53 that penetrate the guide tube 51 in the radial direction are formed at intervals in the circumferential direction. The guide flange 52 serves to support the piston 60, which will be described later, from below. The guide flange 52 is formed with a plurality of second through holes (not shown) that penetrate the guide flange 52 in the up-down direction and are spaced apart in the circumferential direction. This makes it possible to supply the contents in the cylinder 30 into the stem 10 through the second through holes of the guide flange 52 and the first through hole 53 of the guide tube 51. The piston guide 50 thus configured functions as an upper valve body in the pump module 11 in cooperation with a piston 60 which will be described later.

[0036] (piston) The piston 60 is linked to the up and down movement of the stem 10 and is fitted inside the cylinder 30 so as to be able to slide up and down. The piston 60 includes an outer sliding cylinder 61, an inner sliding cylinder 62, and a connecting cylinder 63, and is disposed coaxially with the container axis O in a state where it is disposed between the expanded diameter portion 10a of the stem 10 and the guide flange 52.

[0037] The outer sliding cylinder 61 is formed in a tapered shape that gradually expands in diameter from the vertical center toward the top and bottom, and has lips located at both vertical ends. The lips are in close sliding contact with the inner circumferential surface of the cylinder peripheral wall 31. This ensures a predetermined seal between the lips and the inner circumferential surface of the cylinder peripheral wall 31. Before the pressing head 13 is pressed down, the outer sliding cylinder 61 is disposed in a position where it blocks the air hole 64 formed in the cylinder peripheral wall 31 .

[0038] The inner sliding cylinder 62 is disposed between the outer sliding cylinder 61 and the guide cylinder 51. The upper end of the inner sliding cylinder 62 enters the inside of the expanded diameter portion 10a of the stem 10 from below and is in close sliding contact with the inner circumferential surface of the expanded diameter portion 10a. The lower end of the inner sliding cylinder 62 is seated on the guide flange 52 so as to be able to separate from above. This makes it possible for the inner sliding tube 62 to switch between communication and blocking between the part of the cylinder 30 located below the piston 60 (hereinafter referred to as the lower chamber 38) and the first through hole 53 in the piston guide 50.

[0039] The connecting tube 63 connects the inner peripheral surface of the outer sliding tube 61 and the outer peripheral surface of the inner sliding tube 62, and extends continuously over the entire circumferential length. The upper part of the connecting tube 63 faces the lower end opening edge of the enlarged diameter portion 10a of the stem 10 in the vertical direction with a certain gap therebetween.

[0040] (Support tube) The support tube 70 functions as a retaining member for each component arranged inside the cylinder 30, such as the piston 60. The support tube 70 is attached to the inside of the upper end of the cylinder peripheral wall 31 and is arranged coaxially with the container axis O. The support tube 70 includes a support tube main body 71 fitted to the inside of the cylinder peripheral wall 31, and an annular flange portion 72 protruding radially outward from the upper end of the support tube main body 71.

[0041] The support tube body 71 is formed so as to surround the expanded diameter portion 10a of the stem 10 from the radial outside. As a result, the outer sliding tube 61 of the piston 60 is disposed below the support tube body 71. The flange portion 72 is disposed on the flange portion 33 of the cylinder 30, and is sandwiched in the vertical direction between the flange portion 33 and the cap top wall 21. As a result, the entire support tube 70 is attached to the inside of the cylinder peripheral wall 31.

[0042] A support tube 73 that protrudes radially inward and then extends upward is integrally formed on the inner circumferential surface of the support tube body 71. The support tube 73 surrounds a portion of the stem 10 that is located above the expanded diameter portion 10a from the radial outside. Therefore, by using the support tube 73, it is possible to prevent, for example, the stem 10 from slipping out of the cylinder 30 in the upward direction.

[0043] (urging member) The biasing member 80 is disposed in a state compressed from its natural length, and biases the stem 10 upward via the pressing head 13. The urging member 80 is disposed inside the cylinder 30 in a state surrounding the stem 10 from the outside in the radial direction, and is disposed coaxially with the container axis O. The lower end of the urging member 80 is disposed between the support tube 73 and the support tube main body 71, and is fitted into the support tube 73. The upper end of the urging member 80 is disposed above the upper end of the stem 10, and is fitted into a connecting rib 95 of the press-down head 13, which will be described later. As a result, the biasing member 80 is disposed in a vertically compressed state between the support tube 70 and the press-down head 13. The biasing member 80 will be described in detail later.

[0044] (Pressing head) The push-down head 13 is disposed above the pump module 11 configured as described above, and is attached to the upper end of the stem 10 . The push-down head 13 is formed in a cylindrical shape with a top having a head top wall 90 and a head peripheral wall 91, and is disposed coaxially with the container axis O. The head peripheral wall 91 is formed with an outer diameter smaller than the inner diameter of the regulating tube 22 in the mounting cap 12, and is capable of moving downward within the regulating tube 22 when the push-down head 13 is pressed down (see FIG. 7). The lower end of the head peripheral wall 91 is located below the upper end of the regulating tube 22.

[0045] A connecting tube portion 92 extending downward from the head top wall 90 is formed coaxially with the container axis O on the inner side of the head peripheral wall 91. In the illustrated example, the connecting tube portion 92 is formed so as to protrude downward beyond the head peripheral wall 91. The connecting tube portion 92 is inserted into the inner side of the upper end portion of the stem 10. At this time, the connecting tube portion 92 is fitted into the stem 10. As a result, the press-down head 13 is attached to the upper end portion of the stem 10.

[0046] Furthermore, the press-down head 13 includes a nozzle tube portion 93 extending radially outward from the head peripheral wall 91. The nozzle tube portion 93 is formed to a length such that it does not protrude radially outward beyond the mounting tube 20 of the mounting cap 12, and is formed to extend toward the inside of the head peripheral wall 91 and communicate with the inside of the connecting tube portion 92. A nozzle hole 94 for discharging the contents to the outside is formed at the tip of the nozzle tube portion 93. Therefore, the nozzle hole 94 communicates with the inside of the stem 10 through the nozzle tube portion 93 and the connecting tube portion 92. Therefore, the contents supplied into the stem 10 can be discharged to the outside through the nozzle hole 94.

[0047] A plurality of connecting ribs 95 protruding radially outward are formed at intervals in the circumferential direction on the outer circumferential surface of the upper end of the connecting tube portion 92. In the illustrated example, the connecting ribs 95 are formed so as to curve radially inward as they extend from the top to the bottom. As described above, the upper end of the urging member 80 is fitted to the plurality of connecting ribs 95 so as to surround them from the outside in the radial direction.

[0048] 1 to 3, a protrusion is formed on the lower end of the head peripheral wall 91, protruding radially outward and positioned inside the regulating tube 22. In the illustrated example, two protrusions, a first protrusion 96 and a second protrusion 97, are formed. The first protrusion 96 is formed on a portion of the outer circumferential surface of the head peripheral wall 91 that is located below the nozzle cylinder portion 93. The second protrusion 97 is formed on a portion of the outer circumferential surface of the head peripheral wall 91 that is located on the radially opposite side with the container axis O in between.

[0049] The first protrusion 96 and the second protrusion 97 are formed to extend in the circumferential direction by a predetermined circumferential width in a plan view seen from the container axis O direction, and to extend in the vertical direction by a predetermined length. In the illustrated example, the second protrusion 97 is formed to have a circumferential width longer than the circumferential width of the first protrusion 96. However, this is not limited to this case. The circumferential width of the second protrusion 97 may be equal to the circumferential width of the first protrusion 96, or may be smaller than the circumferential width of the first protrusion 96.

[0050] The press-down head 13 configured as described above can be switched, by rotation about the container axis O, between a restricted position P1 in which downward movement is restricted and an allowed position P2 in which downward movement is allowed. The restricted position P1 refers to a state in which the first protrusion 96 and the second protrusion 97 of the press-down head 13 are positioned within a first circumferential groove 105 and a second circumferential groove 106 (see FIG. 5), as will be described later, as shown in Fig. 1. The permitted position P2 refers to a state in which the first protrusion 96 and the second protrusion 97 of the press-down head 13 are positioned within a first longitudinal groove 100 and a second longitudinal groove 101, as shown in Figs. 2 and 3.

[0051] In this embodiment, when the press-down head 13 is located at the permissible position P2, the nozzle cylinder portion 93 is generally aligned in the front-rear direction and the nozzle hole 94 opens forward. Furthermore, by rotating the press-down head 13 in the second direction M2 about the container axis O, it is possible to switch from the restricting position P1 to the permissible position P2, and conversely, by rotating the press-down head 13 in the first direction M1, it is possible to switch from the permissible position P2 to the restricting position P1.

[0052] The first longitudinal groove 100, the first circumferential groove 105, the second longitudinal groove 101 and the second circumferential groove 106 will be described in detail. 1 to 5, a first vertical groove 100 and a second vertical groove 101, which open upward, are formed at intervals in the circumferential direction on the inner peripheral surface of the regulating tube 22 in the attachment cap 12. The first vertical groove 100 and the second vertical groove 101 are formed to face each other in the radial direction with the container axis O in between, and are formed to be aligned in the front-rear direction in a plan view seen from the direction of the container axis O. Furthermore, the first vertical groove 100 and the second vertical groove 101 are formed over the entire length of the regulating tube 22.

[0053] 3, the first vertical groove 100 is formed in a shape corresponding to the outer shape of the first protrusion 96 in a plan view seen from the container axis O direction, and is formed so as to have a circumferential width slightly larger than that of the first protrusion 96. Furthermore, the depth (radial recess amount) of the first vertical groove 100 is larger than the radial protrusion amount of the first protrusion 96. The second vertical groove 101 is formed in the same manner as the first vertical groove 100. That is, the second vertical groove 101 is formed in a shape corresponding to the outer shape of the second protrusion 97 in a plan view seen from the container axis O direction, and is formed so as to have a circumferential width slightly larger than that of the second protrusion 97. Furthermore, the depth (radial recess amount) of the second vertical groove 101 is larger than the radial protrusion amount of the second protrusion 97.

[0054] Therefore, when the first protrusion 96 is located in the first vertical groove 100 and the second protrusion 97 is located in the second vertical groove 101 (i.e., when the pressing head 13 is located in the permissible position P2), it is possible to press down the pressing head 13.

[0055] 1 to 5, the first circumferential groove 105 is formed on the inner circumferential surface at the upper end of the regulating tube 22. The first circumferential groove 105 is formed so as to communicate with the inside of the first vertical groove 100 and to extend circumferentially from the first vertical groove 100 in the first direction M1. Furthermore, the first circumferential groove 105 opens upward. Among the wall surfaces defining the first circumferential groove 105, the bottom wall surface facing upward functions as a regulating wall 110 that regulates the downward movement of the first protrusion 96 by contacting the first protrusion 96 from below when the pressing head 13 is positioned at the regulating position P1.

[0056] As shown in Fig. 4, the height of the restriction wall 110 is formed to be located higher than the lower surface 96a of the first protrusion 96 when it is located in the first vertical groove 100. This allows the first protrusion 96 to ride up from the first vertical groove 100 onto the restriction wall 110 while being pulled upward (lifted) as the press-down head 13 rotates from the allowable position P2 toward the restriction position P1, as shown in Fig. 5.

[0057] 4, when the pressing head 13 is located at the permissible position P2, a portion of the first protrusion 96 that faces the first circumferential groove 105 in the circumferential direction is formed with an inclined surface 111 that extends from above toward the second direction M2 (extending from the first circumferential groove 105 side toward the first longitudinal groove 100 side) from above toward below. In the illustrated example, the inclined surface 111 is inclined while being curved. Therefore, the first protrusion 96 is capable of climbing up onto the restriction wall 110 while being in contact with the inclined surface 111 as the press-down head 13 rotates from the permitted position P2 towards the restriction position P1.

[0058] As described above, when the first protrusion 96 is positioned in the first circumferential groove 105, as shown in Fig. 5, the first protrusion 96 rides up onto the regulating wall 110, thereby restricting the downward movement of the first protrusion 96. This makes it possible to restrict the pressing operation of the press-down head 13.

[0059] 3 and 5, the peripheral end wall that defines the first circumferential groove 105 faces the second direction M2 and serves as a positioning surface 112 that contacts the first protrusion 96 when the first protrusion 96 moves in the first direction M1. This makes it possible to restrict the rotation of the press head 13 in the first direction M1 and to appropriately position the press head 13 at the restriction position P1. 3 and 5, the wall surface that faces the first direction M1 among the wall surfaces that define the first longitudinal groove 100 is a positioning surface 113 that contacts the first protrusion 96 when the first protrusion 96 moves in the second direction M2. This makes it possible to restrict the rotation of the press-down head 13 in the second direction M2, and to appropriately position the press-down head 13 at the permissible position P2.

[0060] 3, a jumping over projection 114 that projects radially inward is formed so as to extend circumferentially on the outer wall surface that defines the first circumferential groove 105. The jumping over projection 114 projects so as to press against the outer circumferential surface of the first protrusion 96 with an appropriate frictional resistance. This makes it possible to apply a resistance force to the first protrusion 96 when switching the press-down head 13 between the restricted position P1 and the permitted position P2, and makes it possible to perform a switching operation of the press-down head 13 while feeling a sense of operation.

[0061] The second circumferential groove 106 has a similar configuration to the above-mentioned first circumferential groove 105. Therefore, detailed description of the second circumferential groove 106 will be omitted, and the same reference numerals will be used for components corresponding to the first circumferential groove 105. Furthermore, the second protrusion 97 also has an inclined surface 111 like the first protrusion 96.

[0062] (urging member) As shown in FIGS. 1 and 2, the biasing member 80 is disposed in a state compressed from its natural length regardless of whether the pressing head 13 is located at the restricting position P1 or the allowing position P2. In this regard, when the pressing head 13 is located at the restricting position P1 as shown in Fig. 1, the first protrusion 96 (as well as the second protrusion 97) rides up onto the restricting wall 110 so as to be pulled upward. As a result, the pressing head 13 is positioned higher when it is located at the restricting position P1 as shown in Fig. 1 than when it is located at the allowable position P2 as shown in Fig. 2.

[0063] Therefore, the urging member 80 is designed so that the compression ratio when the press-down head 13 is located at the regulating position P1 is smaller than the compression ratio when the press-down head 13 is located at the permissible position P2 due to the first protrusion 96 and the second protrusion 97 climbing up onto the regulating wall 110. In other words, the urging member 80 is in a state closer to its natural length when the press-down head 13 is located at the regulating position P1. Therefore, at the restricted position P1, the biasing member 80 biases the press-down head 13 upward with a weaker elastic restoring force (spring force) caused by compression (or with no force applied) than at the permitted position P2.

[0064] 1, when the pressing head 13 is located at the restriction position P1, the first protrusion 96 and the second protrusion 97 climb up onto the restriction wall 110, so that the pressing head 13 is located above the allowable position P2 shown in FIG. 2. Therefore, the stem 10 and the piston guide 50 are pulled upward along with the pressing head 13. Therefore, the guide flange 52 can be strongly pressed against the piston 60 from below, and the sealing performance between the piston 60 and the guide flange 52 can be improved.

[0065] The shape of the biasing member 80 will now be described in detail. As shown in Figures 1 and 6, the biasing member 80 includes a plurality of ring portions (annular bodies) 81 arranged at intervals in the vertical direction, a plurality of elastic spring portions 82 that connect each of the plurality of ring portions 81 in the vertical direction and are arranged at intervals in the circumferential direction and are elastically deformable in the vertical direction, an upper tube 83 arranged above the plurality of ring portions 81, and a lower tube 84 arranged below the plurality of ring portions 81, and is formed of a synthetic resin material.

[0066] The upper tube 83 is formed in a cylindrical shape that surrounds the connecting rib 95 formed on the press-down head 13 from the outside in the radial direction, and is fitted into the connecting rib 95. The lower tube 84 is formed in a cylindrical shape that surrounds the support tube 73 from the outside in the radial direction, and is fitted into the support tube 73. The upper tube 83 and the lower tube 84 are formed to have the same diameter.

[0067] The multiple ring portions 81 are formed in annular shapes of the same diameter as the upper tube 83 and the lower tube 84, and are arranged between the upper tube 83 and the lower tube 84 at equal intervals in the vertical direction. The elastic spring portions 82 are arranged at equal intervals in the circumferential direction. In the illustrated example, three elastic spring portions 82 are arranged at equal intervals in the circumferential direction. Each elastic spring portion 82 connects the multiple ring portions 81 in the up-down direction, and has an upper end connected to the lower opening edge of the upper tube 83 and a lower end connected to the upper opening edge of the lower tube 84.

[0068] Specifically, the elastic spring portion 82 is connected to the ring portion 81 located at the lowest stage in a state inclined so as to extend in the second direction M2 as it extends upward from the lower tube 84, and is connected to the ring portion 81 located above the lowest stage in a state inclined so as to extend in the first direction M1 as it extends upward from the ring portion 81, and thereafter, the direction of inclination alternates as it reaches the upper tube 83. In this manner, the elastic spring portion 82 connects the multiple ring portions 81 in the up-down direction while alternating inclination directions.

[0069] (Ejector Action) Next, a case where the content is discharged using the dispenser 1 configured as described above will be described. 1 and 5, when the press head 13 is located at the restriction position P1, the first protrusion 96 and the second protrusion 97 ride on the restriction wall 110, restricting the downward movement of the first protrusion 96 and the second protrusion 97. This restricts the downward movement of the press head 13. Therefore, even if an unexpected external force acts on the press-down head 13, the press-down head 13 will not be pressed down, and unintended discharge of the contents can be prevented.

[0070] Next, the discharge of the contents will be described. In this case, the press head 13 is rotated in the second direction M2 around the container axis O, and the press head 13 is moved from the restricted position P1 shown in Fig. 1 to the permitted position P2 shown in Fig. 2. Specifically, by rotating the press head 13 in the second direction M2, as shown in Figs. 2 and 3, the first protrusion 96 can be moved from inside the first circumferential groove 105 to inside the first vertical groove 100, and the second protrusion 97 can be moved from inside the second circumferential groove 106 to inside the second vertical groove 101. This releases the restriction on the downward movement of the press head 13, and allows the press head 13 to move downward.

[0071] Since the first protrusion 96 can be brought into contact with the positioning surface 113 of the first longitudinal groove 100 and the second protrusion 97 can be brought into contact with the positioning surface 113 of the second longitudinal groove 101, the first protrusion 96 and the second protrusion 97 can be reliably positioned in the first longitudinal groove 100 and the second longitudinal groove 101. This allows the pressing head 13 to be appropriately positioned at the permissible position P2.

[0072] After switching the push-down head 13 to the permitted position P2, the push-down head 13 shown in FIG. 2 is pushed down while the biasing member 80 is elastically deformed. This allows the stem 10 to be pushed down together with the push-down head 13. As a result, the enlarged diameter portion 10a of the stem 10 moves downward and approaches the piston 60, and at the same time, the piston guide 50 moves downward together with the stem 10, so that the guide flange 52 moves away from the piston 60. Therefore, the seal between the guide flange 52 and the inner sliding tube 62 of the piston 60 is released, and the lower chamber 38 in the cylinder 30 and the first through hole 53 of the piston guide 50 are in communication with each other through the second through hole.

[0073] 7, by further pressing down the push-down head 13, the enlarged diameter portion 10a of the stem 10 comes into contact with the piston 60, so that the piston 60 can be moved downward together with the push-down head 13. This makes it possible to pressurize the lower chamber 38 in the cylinder 30, and the content liquid in the cylinder 30 can be supplied into the stem 10 through the first through-hole 53 and the second through-hole, and can also be supplied from the stem 10 to the nozzle hole 94 through the connecting tube portion 92 and the nozzle tube portion 93. As a result, the contents can be discharged to the outside through the nozzle hole 94. When the contents are discharged, the valve body 42 of the lower valve element 40 is seated against the cylinder bottom wall 32, closing the flow hole 34.

[0074] When the pressing down of the press-down head 13 is released after the content is discharged, the urging member 80 elastically deforms to restore and can apply an upward urging force to the press-down head 13. This allows the stem 10 to move upward together with the press-down head 13 to restore it, and the press-down head 13 and the stem 10 can be returned to their original positions.

[0075] In the above process, the guide flange 52 can be brought into contact with the piston 60 from below as the stem 10 moves upward. This allows the gap between the guide flange 52 and the inner sliding cylinder 62 to be sealed, and communication between the lower chamber 38 in the cylinder 30 and the inside of the stem 10 to be blocked. Then, the piston 60 can be moved upward together with the piston guide 50 by further upward movement of the stem 10, so that the lower chamber 38 in the cylinder 30 can be depressurized. This allows the valve body 42 to be separated upward while elastically deforming the elastic arm 43 in the lower valve body 40, and the flow hole 34 to be opened. Therefore, the contents in the container body 2 can be sucked up into the cylinder 30 through the pipe 36, and can be prepared for the next discharge.

[0076] Furthermore, by sucking the contents into the cylinder 30, the negative pressure inside the cylinder 30 is released, and the elastic restoration deformation of the elastic arm 43 causes the valve body 42 to seat on the cylinder bottom wall 32, thereby closing the flow hole 34 again.

[0077] Then, after the pressing head 13 and the stem 10 are returned to their original positions, the pressing head 13 is rotated in the first direction M1 around the container axis O, and the pressing head 13 is moved from the permitted position P2 to the restricted position P1. Specifically, by rotating the pressing head 13 in the first direction M1, as shown in FIG. 5, the first protrusion 96 can be moved from inside the first vertical groove 100 to inside the first circumferential groove 105, and the second protrusion 97 can be moved from inside the second vertical groove 101 to inside the second circumferential groove 106. This allows the first protrusion 96 to ride up onto the restricting wall 110 of the first circumferential groove 105, and the second protrusion 97 to ride up onto the restricting wall 110 of the second circumferential groove 106. As a result, the downward movement of the pressing head 13 can be restricted again.

[0078] Since the first protrusion 96 can be brought into contact with the positioning surface 112 of the first circumferential groove 105 and the second protrusion 97 can be brought into contact with the positioning surface 112 of the second circumferential groove 106, the first protrusion 96 and the second protrusion 97 can be reliably positioned within the first circumferential groove 105 and the second circumferential groove 106. This allows the pressing head 13 to be appropriately positioned at the restriction position P1.

[0079] As described above, according to the dispenser 1 of this embodiment, the push-down head 13 cannot be pushed down unless the push-down head 13 is switched from the restricting position P1 to the allowing position P2, so that it is possible to prevent the contents from being unintentionally dispensed due to an unexpected external force, for example, during product distribution, storage, etc. Furthermore, since the stem 10 does not move downward unintentionally, it is also possible to prevent, for example, the sealing performance of the dispenser 1 from being deteriorated and the contents from being exposed to the outside air.

[0080] In particular, when the pressing head 13 is positioned at the restricting position P1, the first protrusion 96 and the second protrusion 97 can be caused to ride up on the restricting wall 110 as shown in Figs. 1 and 5, so that the position of the pressing head 13 can be raised higher than when the pressing head 13 is positioned at the permissible position P2. Therefore, the stem 10 can be raised higher via the pressing head 13, so that the biasing member 80 can be brought to a state close to its natural length. Therefore, the compression rate of the biasing member 80 when the pressing head 13 is positioned at the restricting position P1 can be made smaller than the compression rate of the biasing member 80 when the pressing head 13 is positioned at the permissible position P2.

[0081] Therefore, it is possible to reduce the burden on the urging member 80 during product distribution, storage, etc., and to prevent the urging member 80 from becoming worn or losing its strength. Therefore, even if the urging member 80 is stored for a long period of time, the strength and quality of the urging member 80 can be maintained, and the sealing performance of the dispenser 1 can be stably maintained. Furthermore, when the push-down head 13 is located at the regulating position P1, the guide flange 52 can be strongly pressed against the piston 60 from below, improving the sealing performance between the piston 60 and the guide flange 52. This allows the sealing performance of the dispenser 1 to be stably maintained, as described above.

[0082] Furthermore, in the dispenser 1 of this embodiment, when the push-down head 13 is rotated in the first direction M1 around the container axis O from the permissible position P2 toward the regulated position P1, the inclined surface 111 can be used to smoothly guide the first protrusion 96 and the second protrusion 97 onto the regulated wall 110. Therefore, the pressing head 13 can be rotated with little resistance, and the ease of switching from the permitted position P2 to the restricted position P1 can be improved.

[0083] Furthermore, in the dispenser 1 of this embodiment, the urging member 80 is made of synthetic resin, so that the environmental load can be reduced, and for example, a dispenser 1 in which all the components are made of synthetic resin can be realized. This eliminates the need to separate the urging member 80 from other components when disposing of the dispenser 1, which can lead to easier disposal by users. Furthermore, since the urging member 80 can be kept close to its natural length during product distribution and storage, even if the urging member 80 is made of synthetic resin, it is unlikely to become worn or lose strength. Therefore, even if the urging member 80 is made of synthetic resin, it can be stored for a long period of time, and the sealing property of the dispenser 1 can be stably maintained.

[0084] Furthermore, since the biasing member 80 is configured to connect multiple ring portions 81 in the vertical direction using multiple elastic spring portions 82 arranged at intervals in the circumferential direction, twisting or distortion is less likely to occur compared to, for example, a coil spring in which a wire is wound, and it is easier to generate a stable biasing force (elastic force) over a long period of time.

[0085] Second embodiment Next, a second embodiment of the dispenser according to the present invention will be described with reference to the drawings. In this second embodiment, the same components as those in the first embodiment are given the same reference numerals, and their description will be omitted. Only the differences will be described.

[0086] As shown in Fig. 8, in the dispenser 120 of this embodiment, a ring member 121 is attached to the lower end of the head peripheral wall 91 of the press-down head 13. Note that Fig. 8 shows a state in which the press-down head 13 is located at the permitted position P2. The ring member 121 surrounds the lower end portion of the head peripheral wall 91 from the outside in the radial direction, and is undercut-fitted to the head peripheral wall 91 so as to be rotatable around the container axis O. At this time, the ring member 121 is attached so as to have a certain frictional resistance (rotational resistance) between it and the head peripheral wall 91. The frictional resistance between the ring member 121 and the head peripheral wall 91 is set to be sufficiently larger than the frictional resistance between the first protrusion 96 and the climbing over projection 114 and the frictional resistance between the second protrusion 97 and the climbing over projection 114. A first protrusion 96 and a second protrusion 97 are integrally formed on the ring member 121 .

[0087] (Ejector Action) According to the dispenser 120 of this embodiment configured in this manner, when the push-down head 13 is rotated around the container axis O from the regulated position P1 toward the permitted position P2, due to the difference in frictional resistance as described above, the first protrusion 96 and the second protrusion 97 can be moved so as to overcome the overriding protrusion 114 in the circumferential direction without rotating the ring member 121 relative to the head peripheral wall 91. Therefore, the first protrusion 96 and the second protrusion 97 can follow the rotation of the press-down head 13, and the press-down head 13 can be switched from the restricted position P1 to the permitted position P2. Therefore, the dispenser 120 of this embodiment can achieve the same effects as those of the first embodiment.

[0088] In addition, according to the ejector 120 of this embodiment, when the push-down head 13 is positioned in the permissible position P2, the push-down head 13 can be further rotated in the second direction M2 to rotate the head peripheral wall 91 in the second direction M2 while keeping the first protrusion 96 and the second protrusion 97 in contact with the positioning surface 113 (while restricting the rotation of the ring member 121). In other words, with the rotation of the ring member 121 restricted, a stress exceeding the frictional resistance between the ring member 121 and the head peripheral wall 91 can be transmitted to the head peripheral wall 91, thereby allowing the head peripheral wall 91 to rotate in the second direction M2 relative to the ring member 121.

[0089] This allows the nozzle cylinder portion 93 and the nozzle hole 94 to be positioned so that they face in any direction before pressing down the press-down head 13. Therefore, the direction of the nozzle hole 94 can be freely adjusted, making the dispenser 120 easy to use and convenient.

[0090] Third embodiment Next, a third embodiment of the dispenser according to the present invention will be described with reference to the drawings. In this third embodiment, the same components as those in the second embodiment are denoted by the same reference numerals, and their description will be omitted. Only the differences will be described.

[0091] 9 and 10, in the dispenser 130 of this embodiment, unlike the case where the ring member 121 is undercut fitted to the lower end of the head peripheral wall 91, the head peripheral wall 91 and the ring member 121 are combined by the meshing of a first connecting protrusion 131 formed on the outer circumferential surface of the head peripheral wall 91 and a second connecting protrusion 132 formed on the inner circumferential surface of the ring member 121. Note that Fig. 9 shows a state where the press-down head 13 is located at the permissible position P2.

[0092] The first connecting projections 131 are formed so as to protrude radially outward from the outer circumferential surface at the lower end of the head peripheral wall 91, and are formed in plurality at intervals in the circumferential direction around the entire circumference of the head peripheral wall 91. In the illustrated example, the first connecting projections 131 are formed so as to bulge outward in a semispherical shape in a plan view seen from the container axis O direction.

[0093] The second connecting protrusions 132 are formed so as to protrude radially inward from the inner circumferential surface at the lower end of the ring member 121, and are formed in plurality at intervals in the circumferential direction around the entire circumference of the ring member 121. The second connecting projections 132 are formed so as to be the same in number as the first connecting projections 131, and are arranged at the same pitch in the circumferential direction.

[0094] Each second connecting protrusion 132 has a first engagement surface 132a facing in the second direction M2 about the container axis O, and a second engagement surface 132b facing in the first direction M1. The first engagement surface 132a is a flat surface formed along the radial direction in a plan view seen from the direction of the container axis O. In contrast, the second engagement surface 132b is an inclined surface that is inclined so as to gradually extend toward the second direction M2 from the inner circumferential surface of the ring member 121 toward the inside in the radial direction.

[0095] (Ejector Action) According to the dispenser 130 of the present embodiment configured as described above, when the push-down head 13 is rotated in the second direction M2 from the restricted position P1 toward the permitted position P2 around the container axis O, the first connecting protrusion 131 formed on the head peripheral wall 91 can be engaged with the second engagement surface 132b of the second connecting protrusion 132 from the circumferential direction. At this time, since the second engagement surface 132b is an inclined surface, the first connecting protrusion 131 moves in the second direction M2 while climbing over the second engagement surface 132b in the circumferential direction. Meanwhile, the ring member 121 gradually moves in the second direction M2 since stress is transmitted from the first connecting protrusion 131 while the first connecting protrusion 131 climbs over the second engagement surface 132b in the circumferential direction.

[0096] Therefore, as the pressing head 13 rotates, the ring member 121 can be gradually rotated in the second direction M2, and can ultimately be moved to the permitted position P2 as shown in FIG.

[0097] Therefore, according to the dispenser 130 of this embodiment, it is possible to prevent easy switching from the regulating position P1 to the permissible position P2, and it is possible to effectively prevent unintentional pressing down of the press-down head 13.

[0098] Furthermore, when the presser head 13 is positioned at the permissible position P2, by further rotating the presser head 13 in the second direction M2, the first protrusion 96 and the second protrusion 97 come into contact with the positioning surface 113, so that the head peripheral wall 91 can be rotated in the second direction M2 while restricting the rotation of the ring member 121. In other words, while restricting the rotation of the ring member 121, the first connecting protrusion 131 can be moved so as to get over the second connecting protrusion 132 in the circumferential direction.

[0099] As a result, even in the case of this embodiment, the positions of the nozzle tube portion 93 and the nozzle hole 94 can be adjusted so that they face in any direction before pressing down the press-down head 13. Therefore, the direction of the nozzle hole 94 can be freely adjusted. In particular, in the case of this embodiment, a sense of resistance can be felt each time the first connecting protrusion 131 passes over the second connecting protrusion 132 in the circumferential direction, so that the press-down head 13 can be rotated while feeling, for example, a clicking sensation, making it easy to adjust the orientation of the nozzle hole 94.

[0100] Furthermore, after the contents have been ejected, when the pressing head 13 is rotated in the first direction M1 around the container axis O, the first connecting protrusion 131 engages with the first engagement surface 132a of the second connecting protrusion 132 from the circumferential direction, so that the ring member 121 can be rotated in the first direction M1 while maintaining the engagement state of the first connecting protrusion 131 and the second connecting protrusion 132. Therefore, the switching operation of the presser head 13 from the restricting position P1 to the allowing position P2 can be performed smoothly.

[0101] Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. The embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. The embodiments and their modifications include, for example, those that can be easily imagined by a person skilled in the art, those that are substantially the same, those that are within the scope of the equivalents, and the like.

[0102] For example, in each of the above embodiments, the biasing member is configured to mainly include a plurality of ring portions and a plurality of elastic spring portions, but this is not limited to this case and may be, for example, a coil spring made of synthetic resin, or other spring structures made of synthetic resin. Furthermore, in each of the above embodiments, a biasing member is arranged so as to bias the stem upward via the pressing head, but this is not limited to this case, and for example, a biasing member may be provided so as to directly bias the stem itself upward.

[0103] Furthermore, in each of the above embodiments, the configuration is provided with a first protrusion portion and a second protrusion portion, but the number of protrusion portions is not limited to two, and for example, it may be one, or three or more protrusion portions may be formed.

[0104] Furthermore, in each of the above embodiments, the push-down head is fitted to the stem so that it cannot move up and down and can rotate around the container axis, but this is not limited to this. For example, the stem may be configured to be rotatable around the container axis together with the push-down head. In this case, the piston may be combined with the stem so that it can rotate relative to the stem.

[0105] O…Container axis P1: Restriction position P2: Permitted position 1, 120, 130...dispenser 2…Container body 3…Container mouth 10…Stem 12...Attachment cap 13...Pressing head 22...Regulation tube 30…Cylinder 60…Piston 80... Urging member 81...Ring portion (annular body) 82...Elastic spring part 91…Head wall 94…Nozzle hole 96...First protrusion (protrusion) 97…Second protrusion (protrusion) 100…First vertical groove (vertical groove) 101…Second vertical groove (vertical groove) 105...First circumferential groove (circumferential groove) 106…Second circumferential groove (circumferential groove) 110...Regulatory wall 111…Slope surface 121...Ring member

Claims

1. a stem disposed inside a mouth of a container body for accommodating contents and movable downward in an upward biased state; A cylinder attached to the mouth of the container body via an attachment cap; a piston that is linked to the up and down movement of the stem and is fitted inside the cylinder so as to be able to slide up and down; a push-down head having a nozzle hole for discharging the contents, attached to an upper end of the stem, and rotatable around a container axis of the container body; a regulating cylinder into which the pressing head can enter; a biasing member arranged in a state compressed from its natural length and biasing the stem upward, the pressing head is formed in a cylindrical shape with a top having a head peripheral wall, and is switchable between a restricted position where downward movement is restricted and an allowed position where downward movement is allowed by rotation about the container axis, A protrusion is formed on the head peripheral wall, the protrusion protruding radially outward and positioned inside the regulating tube, a vertical groove that allows the protrusion to move downward when the pressing head is located at the permitted position, and a circumferential groove that extends in a circumferential direction and communicates with the vertical groove, and in which the protrusion is disposed when the pressing head is located at the regulating position, are formed on an inner peripheral surface of the regulating tube; a bottom wall surface of the circumferential groove serves as a restricting wall that restricts downward movement of the protrusion by contacting the protrusion from below, When the pressing head is positioned at the allowable position, a portion of the protrusion that faces the circumferential groove in the circumferential direction is formed with an inclined surface that extends from the circumferential groove side to the vertical groove side as it goes from above to below, the protrusion portion is pulled upward by contact of the inclined surface with the restricting wall as the pressing head rotates from the permitted position toward the restricting position, and the protrusion portion rides from the vertical groove onto the restricting wall, The ejector is characterized in that the compression rate of the urging member when the pressing head is positioned at the regulating position is smaller than the compression rate when the pressing head is positioned at the permissible position due to the protrusion riding up onto the regulating wall.

2. 2. The dispenser of claim 1, A ring member is combined with the head peripheral wall, the ring member being rotatable around the container axis relative to the head peripheral wall and having the protrusion formed thereon, The head peripheral wall and the ring member are assembled together while maintaining a predetermined rotational resistance.

3. The dispenser according to claim 1 or 2, The dispensing device, wherein the biasing member is made of a synthetic resin material.

4. The dispenser according to any one of claims 1 to 3, The biasing member is a plurality of annular bodies arranged at intervals in the vertical direction and into which the stem is inserted; The ejector includes a plurality of elastic spring portions that connect each of the plurality of annular bodies in the vertical direction, are arranged at intervals in the circumferential direction, and are elastically deformable in the vertical direction, and biases the stem upward via the pressing head.

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