Dispenser

Abstract

To provide a discharger having a structure which can reduce metallic materials to be used.SOLUTION: In a discharger (10), a push-down head (10a) is mounted in a stem (42). The push-down head has a valve member (80) for closing a nozzle hole (74) and a moving mechanism section (90) for moving the valve member in a longitudinal direction. The valve member has a first drawing section (84) extending backward from a valve body section (81). The moving mechanism section has a rotation section (91) for moving the first drawing section in a longitudinal direction by rotation and a second drawing section (92) in which a vertical relative position with the rotation section is changed involved in the rotation of the rotation section. The rotation section rotates in a direction for moving downward with respect to the second drawing section and moving the first drawing section backward when a head body moves downward. The discharger further includes a resin spring section (55) which biases the head body upward with respect to the stem.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] As a dispenser attached to the mouth of a container body, a configuration in which a push-down head is attached to a standing stem that can be pushed in while being biased upward is known. The push-down head has a head body in which a nozzle hole that opens forward is formed, and a mounting tubular member that connects the head body and the stem. For example, Patent Document 1 describes, as such a dispenser, a dispenser that includes a valve member that closes the nozzle hole. The valve member is configured to move backward and open the nozzle hole when the push-down head is pressed down against the mounting tubular member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2011 / 093027 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned dispenser, there is a demand to reduce the amount of metal material used in the dispenser, for example, to comply with environmental requirements. However, in the above-mentioned dispenser, in order to return the valve member that has moved rearward to its original position and close the nozzle hole again, it is necessary to provide a metal coil spring that urges the valve member forward. Therefore, there is a problem in that the amount of metal material used in the dispenser cannot be sufficiently reduced.

[0005] In view of the above circumstances, an object of one aspect of the present invention is to provide a dispenser having a structure that allows for a reduction in the amount of metal material used. [Means for solving the problem]

[0006] One aspect of the dispenser of the present invention is a dispenser in which a push-down head is attached to a stem that stands up and can be pushed in in an upwardly biased state, the push-down head having a head body with a nozzle hole that opens forward and communicates with the inside of the stem, a valve member that closes the nozzle hole, and a moving mechanism that moves the valve member in a front-to-rear direction, the head body being movable downward relative to the stem material, the valve member being disposed inside the head body, the valve member having a valve body portion that closes the nozzle hole, and a first extension portion that extends rearward from the valve body portion, The moving mechanism has a rotating part that is disposed on the head body and is rotatable around a rotation axis extending in the left-right direction, and moves the first extension part in the front-rear direction when it rotates, and a second extension part that extends in the vertical direction and whose relative position in the vertical direction with the rotating part changes as the rotating part rotates, and when the head body moves downward relative to the stem, the rotating part moves downward relative to the second extension part and rotates in a direction that moves the first extension part rearward, and the dispenser is provided with a resin spring part that urges the head body upward relative to the stem.

[0007] According to one aspect of the dispenser of the present invention, the valve member has a valve body portion that closes the nozzle hole and a first extension portion that extends backward from the valve body portion. The moving mechanism portion has a rotating portion that is arranged on the head body and can rotate around a rotation axis that extends in the left-right direction, and moves the first extension portion in the front-rear direction by rotating, and a second extension portion that extends in the up-down direction and changes its relative position in the up-down direction with respect to the rotating portion as the rotating portion rotates. When the head body moves downward relative to the stem, the rotating portion moves downward relative to the second extension portion and rotates in a direction that moves the first extension portion backward. Therefore, the mechanism formed by the first extension portion, the second extension portion, and the rotating portion can convert the up-down movement of the head body relative to the stem into a front-rear movement and transmit it to the valve member. As a result, by pressing down the pressing head, the valve member can be easily and suitably moved backward to open the nozzle hole.

[0008] As described above, the valve member can be moved backward by moving the head body downward relative to the stem using a mechanism composed of the first extension section, the second extension section, and the rotation section, so that the valve member can be moved forward by moving the head body upward relative to the stem. Therefore, by providing a resin spring section that urges the head body upward relative to the stem, the valve member can be returned to a position that blocks the nozzle hole again by utilizing the restoring force of the resin spring section when the pressing head is released. In other words, there is no need to provide a urging member that pushes the valve member forward to return the valve member to its original position. This improves the degree of freedom in selecting the urging member, compared to, for example, a case in which a urging member for returning the valve member to its original position is provided in the space (valve chamber) in which the valve member is provided and the valve member is urged forward.

[0009] Specifically, in the past, for example, when a biasing member is provided in the valve chamber to bias the valve member forward, it was necessary to use a metal coil spring as the biasing member due to problems such as space constraints and durability in the valve chamber. However, according to one aspect of the dispenser of the present invention, the biasing member can be disposed below the head main body, where a relatively large space can be easily secured, and therefore the range of biasing members that can be used can be increased. Therefore, the biasing member can be a resin spring portion made of resin. This makes it possible to suitably replace the metal coil spring with the resin spring portion made of resin. Therefore, according to one aspect of the dispenser of the present invention, the metal material used in the dispenser can be reduced. In addition, since there is no need to provide a metal biasing member in the valve chamber, there is no need to seal the biasing member in the valve chamber to prevent the contents from contacting the biasing member. Therefore, the number of sealed locations in the dispenser can be reduced.

[0010] The rotating portion may be a pinion gear, and the first extension portion and the second extension portion may be rack gears that mesh with the pinion gear. According to this configuration, a rack-and-pinion mechanism can be formed by the first extension portion, the second extension portion, and the rotating portion. This allows the valve member to be stably moved by the rack-and-pinion mechanism. Therefore, by pressing down the pressing head, the valve member can be stably moved backward, and the nozzle hole can be suitably opened.

[0011] The press-down head may have a mounting tube member that connects the head body and the stem, the mounting tube member having a top wall portion and a mounting tube extending downward from the top wall portion and fitted into the upper end portion of the stem, and the resin spring portion may be configured to be positioned between the top wall portion and the head body. According to this configuration, the resin spring portion can suitably and easily bias the head body upward relative to the stem.

[0012] The first extension portion may be located above the rotating portion, the second extension portion may be located in front of the rotating portion, the head body may include a head portion having a accommodating hole portion opening to the front, and a nozzle tube having the nozzle hole and inserted into the accommodating hole portion from the front, the nozzle tube having an opposing portion extending in the front-to-rear direction, and the opposing portion may be arranged opposite to and above the first extension portion. According to this configuration, the rotating portion can be disposed at a position where it is unlikely to interfere with the valve main body, and the first extension portion can be moved rearward by moving the rotating portion downward. Furthermore, with this configuration, the opposing portion can prevent the first extension portion from moving upward. This can prevent the first extension portion from moving upward and coming off the rotating portion. Furthermore, since a space is provided between the first extension portion and the upper surface of the inner surface of the accommodation hole in which the opposing portion is disposed, when the valve member is inserted into the accommodation hole, the first extension portion can be inserted above the rotating portion without contacting the rotating portion. In this case, the first extension portion can be inserted above the rotating portion by moving the valve member downward after inserting it above the rotating portion. This can facilitate assembly of the dispenser. Effect of the Invention

[0013] According to one aspect of the present invention, the amount of metal material used in the dispenser can be reduced. [Brief description of the drawings]

[0014] [Figure 1] FIG. 2 is a cross-sectional view of an embodiment of a dispenser. [Diagram 2] FIG. 2 is a cross-sectional view showing the ejector of the embodiment, illustrating a state in which a nozzle hole is open. [Diagram 3] FIG. 2 is a diagram showing a part of the dispenser of the embodiment, and is a partial cross-sectional view taken along line III-III shown in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, a dispenser according to an embodiment of the present invention will be described with reference to the drawings. Note that the scope of the present invention is not limited to the following embodiment, and can be arbitrarily modified within the scope of the technical concept of the present invention. 1 and 2, the dispenser 10 of this embodiment is a dispenser that is attached to the mouth 21 of a container body 20 in which the contents are accommodated. By attaching the dispenser 10 to the mouth 21, a dispensing container 100 including the container body 20 and the dispenser 10 is configured. The contents accommodated in the container body 20 are not particularly limited. The dispenser 10 includes an attachment cap 30, a pump part 40 having a cylinder 41 and a stem 42, and a push-down head 10a.

[0016] The mounting cap 30, the cylinder 41, and the stem 42 are each formed in a cylindrical shape, and are arranged with their central axes positioned on a common axis. Hereinafter, this common axis is referred to as the axis O. The direction in which the axis O extends is referred to as the up-down direction, and is shown in the Z-axis direction in each drawing. The direction from the container body 20 toward the dispenser 10 in the up-down direction, i.e., the direction in which the Z-axis arrow points, is referred to as the upward direction. The direction from the dispenser 10 toward the container body 20 in the up-down direction, i.e., the opposite direction to the direction in which the Z-axis arrow points, is referred to as the downward direction. In addition, one direction among the directions perpendicular to the axis O is referred to as the front-rear direction, and is shown in the X-axis direction in each drawing. In the front-rear direction, the direction in which the X-axis arrow points is referred to as the forward direction, and in the front-rear direction, the opposite direction to the direction in which the X-axis arrow points is referred to as the rearward direction. In addition, among the directions perpendicular to the axis O, the direction perpendicular to the front-rear direction is referred to as the left-right direction, and is shown in the Y-axis direction in each drawing. Moreover, the direction intersecting the axis O in a plan view seen from the top and bottom direction is called the radial direction.

[0017] The mounting cap 30 has an annular wall portion 31 in the form of a circular ring plate arranged coaxially with the axis O, an inner cylinder portion 32 extending downward from the annular wall portion 31, an outer cylinder portion 33 located radially outward from the inner cylinder portion 32 and extending downward from the radial outer edge portion of the annular wall portion 31, and an upper cylinder portion 34 extending upward from the annular wall portion 31. The radial inner edge portion of the annular wall portion 31 is located above the mouth portion 21 of the container body 20. The inner cylinder portion 32 is attached to the mouth portion 21 of the container body 20. In this embodiment, the inner cylinder portion 32 is screwed into the mouth portion 21. The upper cylinder portion 34 is arranged coaxially with the axis O and is cylindrical in shape opening upward.

[0018] The pump portion 40 sends the contents in the container body 20 toward a nozzle hole 74 (described later) provided in the press-down head 10a. The cylinder 41 of the pump section 40 is cylindrical and has an upward opening, with the axis O as its center. The cylinder 41 is inserted into the mouth section 21 of the container body 20. The upper end of the cylinder 41 is provided with a flange section 41a that protrudes radially outward. The flange section 41a is sandwiched between the annular wall section 31 and the upper end section 21 in the vertical direction. A seal member 41b is provided between the flange section 41a and the upper end section 21 in the vertical direction. Although not shown, a spring that urges the stem 42 upward is disposed inside the cylinder 41. The spring is preferably made of resin. The spring that urges the stem 42 upward may be disposed outside the cylinder 41.

[0019] The stem 42 of the pump section 40 stands upright in an upwardly biased state so as to be pushable downward. The stem 42 is disposed coaxially with the axis O and has a cylindrical shape that opens upward. The stem 42 is inserted into the cylinder 41 from above. An upper portion of the stem 42 protrudes above the cylinder 41 and is located within the upper tube section 34 of the attachment cap 30. Although not shown in the figures, the stem 42 has a piston portion that slides against the inner circumferential surface of the cylinder 41. When the stem 42 is pushed downward and then pushed upward by a spring (not shown), negative pressure is created inside the cylinder 41, and the contents inside the container body 20 are sucked up into the cylinder 41. When the stem 42 is pushed downward in this state, the contents inside the cylinder 41 are sent through the stem 42 to a nozzle hole 74, which will be described later.

[0020] The press-down head 10a has a head main body 10b, a mounting tubular member 50, a valve member 80, and a movement mechanism unit 90. The head main body 10b has a head unit 60 and a nozzle tube . The mounting tube member 50 is attached to the upper end of the stem 42. The mounting tube member 50 is a member that connects the head main body 10b and the stem 42. The mounting tube member 50 has a top wall portion 51, a surrounding tube 52 and a mounting tube 53 that extend downward from the top wall portion 51, a sliding tube 54 that extends upward from the top wall portion 51, and a resin spring portion 55.

[0021] The top wall portion 51 is an annular plate disposed coaxially with the axis O. The top wall portion 51 protrudes radially outward from the upper end of the stem 42. The radial inner edge of the top wall portion 51 contacts the upper end of the stem 42 from above. The radial outer edge of the top wall portion 51 is located radially inward from the upper tube portion 34 of the mounting cap 30. The top wall portion 51 is formed with a hole portion 51a penetrating the top wall portion 51 in the up-down direction. In this embodiment, two hole portions 51a are provided at an interval in the circumferential direction around the axis O. The two hole portions 51a are disposed on either side of the axis O in the radial direction. Although not shown, each hole portion 51a is an arc-shaped hole extending in the circumferential direction around the axis O.

[0022] The surrounding tube 52 protrudes downward from the radial outer edge of the top wall portion 51. The surrounding tube 52 is arranged coaxially with the axis O and is cylindrical and opens downward. The surrounding tube 52 is located radially inside the upper tube portion 34 of the mounting cap 30. The surrounding tube 52 surrounds the upper end of the stem 42 from the radial outside. An engagement protrusion 52a is formed on the outer circumferential surface of the surrounding tube 52. The mounting tube 53 protrudes downward from the radial inner edge of the top wall portion 51. The mounting tube 53 is disposed coaxially with the axis O and is cylindrical in shape and opens in both the up and down directions. The mounting tube 53 is fitted into the upper end portion of the stem 42. The inside of the mounting tube 53 communicates with the inside of the stem 42. The lower end portion of the mounting tube 53 is located lower than the lower end portion of the surrounding tube 52.

[0023] The sliding tube 54 protrudes upward from a portion of the top wall portion 51 located radially inward from the hole portion 51a. In this embodiment, the sliding tube 54 protrudes upward from the radial inner edge portion of the top wall portion 51. The sliding tube 54 is arranged coaxially with the axis O and has a cylindrical shape that opens upward. In this embodiment, the outer diameter of the sliding tube 54 is larger than the outer diameter of the mounting tube 53. The inner peripheral surface of the sliding tube 54 is located radially outward from the inner peripheral surface of the mounting tube 53. The upper end portion of the sliding tube 54 is a sliding portion 54a that slides against the inner peripheral surface of the hanging tube 63 described later. The sliding portion 54a extends radially outward as it goes upward.

[0024] In this embodiment, the resin spring portion 55 is provided between the top wall portion 51 and the head main body 10b in the up-down direction. The resin spring portion 55 is a spring portion made of resin that urges the head main body 10b upward relative to the stem 42. In this embodiment, the resin spring portion 55 is disposed in the top wall portion 51. The resin spring portion 55 protrudes upward from the top wall portion 51. The resin spring portion 55 is molded integrally with the top wall portion 51. In this embodiment, the resin spring portion 55 is a leaf spring that is elastically deformable in the up-down direction.

[0025] The resin spring portion 55 is provided at intervals in the circumferential direction around the axis O. In this embodiment, two resin spring portions 55 are provided on either side of the axis O in the radial direction. The two resin spring portions 55 are respectively disposed above the two holes 51a. The lower end of each resin spring portion 55 is connected to one end of each hole portion 51a in the circumferential direction around the axis O. Although not shown, each resin spring portion 55 extends in an arc shape from one end to the other end of each hole portion 51a in the circumferential direction around the axis O when viewed from the top-bottom direction. That is, in this embodiment, the resin spring portion 55 is a leaf spring that extends in a spiral shape around the axis O from the top wall portion 51 upward. The upper end of the resin spring portion 55 is located above the upper end of the sliding tube 54. The resin spring portion 55 is elastically deformable with a force smaller than that of a spring (not shown) that urges the stem 42 upward. The spring constant of the resin spring portion 55 is smaller than the spring constant of a spring (not shown) that urges the stem 42 upward.

[0026] The head body 10b is movable downward relative to the mounting tube member 50. The head portion 60 of the head body 10b is disposed coaxially with the axis O and has a cylindrical shape with an open top that opens downward. The head portion 60 covers the mounting tubular member 50 from above. The head portion 60 has a main body portion 61 located above the mounting tubular member 50, and a peripheral wall portion 62 and a hanging tube 63 that extend downward from the main body portion 61. The upper end of the resin spring portion 55 is in contact with the lower surface of the main body portion 61. The main body portion 61 is biased upward by the resin spring portion 55. The main body portion 61 has an accommodating hole portion 61a that opens forward. The accommodating hole portion 61a is a hole having a bottom portion 61d at the rear end. The accommodating hole portion 61a is a circular hole that is arranged coaxially with a center line L that extends in the front-rear direction. The center line L is perpendicular to the axis line O. As shown in FIG. 3, the accommodating hole portion 61a extends in the front-rear direction across the axis line O.

[0027] Support walls 61b are formed on both left and right sides of the inner surface of the accommodating hole 61a. The pair of support walls 61b are arranged on either side of the axis O in the left-right direction. The pair of support walls 61b protrude from the inner surface of the accommodating hole 61a in directions approaching each other in the left-right direction. The pair of support walls 61b extend in the front-rear direction. The front ends of the pair of support walls 61b are located forward of the axis O. The rear ends of the pair of support walls 61b are located rearward of the axis O and are connected to the bottom 61d of the accommodating hole 61a. Each of the pair of support walls 61b has a groove 61c on a surface facing the other support wall 61b. The groove 61c extends in the front-rear direction and opens forward. The front end of the groove 61c is located forward of the axis O. The rear end of the groove 61c is located rearward of the axis O and forward of the bottom 61d of the accommodation hole 61a.

[0028] As shown in FIG. 1, the peripheral wall portion 62 extends downward from the radial outer edge of the main body portion 61. The peripheral wall portion 62 is arranged coaxially with the axis O and is cylindrical and opens downward. The peripheral wall portion 62 is located radially outside the mounting tube member 50 and surrounds the mounting tube member 50. The lower end of the peripheral wall portion 62 is located radially between the upper tube portion 34 of the mounting cap 30 and the surrounding tube 52 of the mounting tube member 50. The lower end of the peripheral wall portion 62 is fitted onto the surrounding tube 52. An engagement protrusion 62a that engages from below with an engagement protrusion 52a formed on the outer peripheral surface of the surrounding tube 52 is formed on the inner peripheral surface of the peripheral tube 52. This prevents the peripheral wall portion 62 from coming off upward from the surrounding tube 52. The outer peripheral surface at the lower end of the peripheral wall portion 62 is arranged radially opposite the inner peripheral surface of the upper tube portion 34 via a gap. The vertical position of the lower end of the peripheral wall 62 is the same as the vertical position of the lower end of the surrounding cylinder 52 when the dispenser 10 is not being operated. The state in which the dispenser 10 is not being operated refers to a state in which the push-down head 10a is not being pressed down, which is the state shown in Fig. 1. The peripheral wall 62 is slidable downward relative to the surrounding cylinder 52.

[0029] The hanging tube 63 extends downward from a portion of the main body 61 located radially inward from the peripheral wall 62. The hanging tube 63 is arranged coaxially with the axis O and is cylindrical in shape and opens in both the up and down directions. The lower end of the hanging tube 63 is located above the lower end of the peripheral wall 62. The upper end of the hanging tube 63 opens into the interior of the accommodation hole 61a. The hanging tube 63 is fitted onto the sliding tube 54. The hanging tube 63 is located radially inward from the resin spring 55. An upper portion of the resin spring 55 is arranged radially between the peripheral wall 62 and the hanging tube 63.

[0030] The nozzle cylinder 70 of the head body 10b is inserted into the accommodation hole portion 61a from the front. The nozzle cylinder 70 is arranged coaxially with the center line L and is cylindrical and opens in both the front-rear direction. The front portion of the nozzle cylinder 70 protrudes forward beyond the accommodation hole portion 61a. The nozzle cylinder 70 has a cylindrical nozzle cylinder main body 71 extending in the front-rear direction, a flange portion 72 protruding from the outer circumferential surface of the nozzle cylinder main body 71 in a direction perpendicular to the center line L, and an opposing portion 73 extending rearward from the nozzle cylinder main body 71.

[0031] The nozzle cylinder body 71 is located forward of the axis O. The nozzle cylinder body 71 opens in both the front and rear directions. The front opening of the nozzle cylinder body 71 is a nozzle hole 74. The nozzle hole 74 opens forward. The nozzle hole 74 communicates with the inside of the stem 42. As shown in FIG. 3, the rear part of the nozzle cylinder body 71 is fitted into the accommodation hole 61a. The rear end of the nozzle cylinder body 71 is disposed opposite the front end of the pair of support wall parts 61b with a gap therebetween. The front part of the nozzle cylinder body 71 protrudes forward from the accommodation hole 61a. The outer diameter and the inner diameter of the front part of the nozzle cylinder body 71 become smaller toward the front. A rib 71a extending in the front and rear directions is formed on the inner peripheral surface of the nozzle cylinder body 71. A plurality of ribs 71a are provided at intervals in the circumferential direction around the center line L. The flange portion 72 is located outside the receiving hole 61a. The flange portion 72 contacts the periphery of the receiving hole 61a on the front surface of the head portion 60 from the front side.

[0032] As shown in FIG. 1, the facing portion 73 extends in the front-rear direction. In this embodiment, the facing portion 73 extends rearward from the upper end at the rear end of the nozzle cylinder main body 71. The facing portion 73 is plate-shaped with a plate surface facing the up-down direction. The rear end of the facing portion 73 is located rearward of the axis O. The rear end of the facing portion 73 is disposed facing the bottom 61d of the accommodation hole 61a with a small gap therebetween. The upper surface of the facing portion 73 is in contact with a portion of the inner surface of the accommodation hole 61a that is located on the upper side. In the following description, the portion of the inner surface of the accommodation hole 61a that is located on the upper side is referred to as the upper inner wall surface 61e. Although not shown in the drawings, a pair of facing portions 73 are provided with a gap therebetween in the left-right direction.

[0033] A valve chamber 10c is defined inside the head body 10b, which is connected to the inside of the stem 42 and can communicate with the outside via a nozzle hole 74. In this embodiment, the inside of the valve chamber 10c is composed of a part of the inside of the accommodation hole 61a and the inside of the nozzle cylinder body 71. More specifically, the inside of the valve chamber 10c is composed of a rear part of the inside of the accommodation hole 61a and the inside of the nozzle cylinder body 71, which are connected in the front-rear direction. The inside of the valve chamber 10c is communicated with the inside of the hanging tube 63. As a result, the nozzle hole 74 and the inside of the stem 42 are communicated with each other via the inside of the valve chamber 10c, the inside of the hanging tube 63, the inside of the sliding tube 54, and the inside of the mounting tube 53.

[0034] The valve member 80 is a member that closes the nozzle hole 74. The valve member 80 is disposed inside the head main body 10b. More specifically, the valve member 80 is disposed inside the valve chamber 10c. The valve member 80 has a valve main body portion 81 that closes the nozzle hole 74, and a first extension portion 84 that extends rearward from the valve main body portion 81. The valve body 81 is arranged coaxially with the center line L and has a cylindrical shape extending in the front-rear direction. The valve body 81 is housed in the nozzle cylinder 70 except for the rear end portion. The valve body 81 is supported by a plurality of ribs 71a provided on the inner peripheral surface of the nozzle cylinder 70 so as to be movable in the front-rear direction. The outer diameter of the front end portion 81a of the valve body 81 becomes smaller toward the front. The front end portion 81a of the valve body 81 is fitted into the nozzle hole 74 from the rear and closes the nozzle hole 74.

[0035] In this embodiment, the first extension portion 84 is a rack gear that meshes with a rotating portion 91, which is a pinion gear and will be described later. The first extension portion 84 has a protruding portion 82 that protrudes upward from the rear end portion of the valve body portion 81, and a first rack gear portion 83 that extends rearward from the protruding portion 82. 3, the protruding portion 82 extends in the left-right direction and protrudes beyond the valve main body 81 on both sides in the left-right direction. In this embodiment, the first rack gear portion 83 is connected to the valve body portion 81 via the protruding portion 82. The first rack gear portion 83 has a rectangular prism shape extending in the front-rear direction. In this embodiment, a pair of the first rack gear portions 83 are provided with a gap in the left-right direction. The pair of first rack gear portions 83 each extend rearward from both left-right ends of the protruding portion 82. As shown in FIG. 1, a plurality of teeth portions 83a arranged side by side in the front-rear direction are provided on the underside of a portion of the first rack gear portion 83 located rearward of the axis O. A pair of opposing portions 73 of the nozzle cylinder 70 are disposed opposite each other above the pair of first rack gear portions 83. The upper surface of the first rack gear portion 83 contacts the lower surface of the opposing portion 73. When the dispenser 10 is not in operation, the rear end portion of the first rack gear portion 83 is located forward and away from the bottom portion 61d of the accommodation hole portion 61a.

[0036] The movement mechanism 90 moves the valve member 80 in the front-rear direction. The movement mechanism 90 has a rotating part 91 disposed in the head main body 10b and a second extending part 92 disposed in the mounting tubular member 50. The rotating portion 91 is a portion that can move the first extension portion 84 in the front-rear direction by rotating. In this embodiment, the rotating portion 91 is a pinion gear. The rotating portion 91 is accommodated in a portion of the interior of the accommodation hole portion 61a that is located rearward of the axis O. In this embodiment, the rotating portion 91 is located below the pair of first rack gear portions 83. In other words, the pair of first rack gear portions 83 are located above the rotating portion 91. The rotating portion 91 is rotatable around a rotation axis R that extends in the left-right direction. The rotation axis R is located rearward of the axis O. The rotation axis R is perpendicular to the center line L.

[0037] As shown in FIG. 3, the rotating part 91 has a pinion gear part 91a and a pair of shaft parts 91b. The pinion gear part 91a is cylindrical and arranged coaxially with the rotation axis R. The outer peripheral surface of the pinion gear part 91a is provided with a plurality of teeth parts 91c arranged side by side in the circumferential direction around the rotation axis R. The plurality of teeth parts 91c are provided over the entire circumference of the pinion gear part 91a. As shown in FIG. 1, the upper tooth part 91c among the plurality of teeth parts 91c meshes with the tooth part 83a of the first rack gear part 83. As a result, the rotating part 91 meshes with the pair of first rack gear parts 83. 3, the pair of shaft portions 91b protrude from the pinion gear portion 91a on both the left and right sides. The pair of shaft portions 91b are cylindrical and arranged coaxially with the rotation axis R. The pair of shaft portions 91b are fitted into rear ends of the pair of grooves 61c, respectively, and are held rotatably around the rotation axis R.

[0038] As shown in FIG. 1, the second extension portion 92 is attached to the upper part of the mounting tube member 50. The second extension portion 92 extends in the vertical direction from the inside of the sliding tube 54 of the mounting tube member 50 to the inside of the accommodation hole portion 61a. In this embodiment, the second extension portion 92 is located in front of the rotating portion 91. The second extension portion 92 changes its vertical relative position with respect to the rotating portion 91 as the rotating portion 91 rotates. In this embodiment, the second extension portion 92 is a rack gear that meshes with the rotating portion 91, which is a pinion gear. The second extension portion 92 has a root portion 92a and a second rack gear portion 92b.

[0039] The root portion 92a is disposed coaxially with the axis O, and has a cylindrical shape with an apex that opens downward. The root portion 92a is fitted into the sliding tube 54. Although not shown, a groove is formed on the outer circumferential surface of the root portion 92a, into which a rotation prevention protrusion provided on the inner circumferential surface of the sliding tube 54 is fitted. This prevents the second extension portion 92 from rotating relative to the mounting tube member 50 around the axis O. A through hole 92d is formed in the top wall of the root portion 92a, vertically penetrating the top wall of the root portion 92a.

[0040] The second rack gear portion 92b extends upward from the rear portion of the base portion 92a. The second rack gear portion 92b is located rearward of the axis O. The second rack gear portion 92b has a rectangular prism shape extending in the vertical direction. The second rack gear portion 92b protrudes from the inside of the sliding tube 54 through the hanging tube 63 into the accommodation hole portion 61a. The upper portion of the second rack gear portion 92b is located in front of the rotating portion 91 and behind the valve main body portion 81. The upper end portion of the second rack gear portion 92b is located downward and away from the upper inner wall surface 61e of the accommodation hole portion 61a when the dispenser 10 is not operated.

[0041] A plurality of teeth 92c are provided on the rear surface of the second rack gear portion 92b in the vertical direction. Among the plurality of teeth 92c, the teeth 92c located in front of the rotating portion 91 meshes with the teeth 91c located in front of the plurality of teeth 91c of the rotating portion 91. As a result, the second rack gear portion 92b meshes with the rotating portion 91. As shown in FIG. 3, the second rack gear portion 92b is located between the pair of first rack gear portions 83 when viewed in the vertical direction.

[0042] As shown in FIG. 2, when a force is applied from above to below on the pressing head 10a, the head body 10b is pushed downward. As a result, the head body 10b moves downward relative to the mounting tube member 50. At this time, the resin spring portion 55 is elastically deformed downward from the state shown in FIG. 1. As the head body 10b moves downward, the valve member 80 disposed in the valve chamber 10c in the head body 10b and the rotating portion 91 disposed in the head body 10b also move downward. Since the rotating portion 91 is engaged with the second extending portion 92, it moves downward relative to the second extending portion 92 while rotating around the rotation axis R. At this time, the rotating portion 91 rotates clockwise around the rotation axis R as viewed from the direction of viewing the dispenser 10 in FIG. 1 and FIG. 2. When the rotating portion 91 rotates in this direction, the first extending portion 84 engaged with the rotating portion 91 moves backward. That is, in this embodiment, when the head body 10b moves downward relative to the mounting tube member 50, the rotating portion 91 moves downward relative to the second extending portion 92 and rotates in a direction that moves the first extending portion 84 rearward.

[0043] As the first extension portion 84 moves rearward, the entire valve member 80 moves rearward, and the front end portion 81a of the valve body portion 81 moves rearward away from the nozzle hole 74. Therefore, the nozzle hole 74 is opened. The first extension portion 84 moves rearward until the rear end portion of the first extension portion 84 abuts against the bottom portion 61d of the accommodation hole portion 61a or the upper end portion of the second extension portion 92 abuts against the upper inner wall surface 61e of the accommodation hole portion 61a. The example shown in FIG. 2 shows a state in which the rear end portion of the first extension portion 84 contacts the bottom portion 61d of the accommodation hole portion 61a and the upper end portion of the second extension portion 92 contacts the upper inner wall surface 61e of the accommodation hole portion 61a. At this time, the second rack gear portion 92b is passed between the pair of first rack gear portions 83 in the left-right direction. In addition, the upper end portion of the second rack gear portion 92b is located between the pair of opposing portions 73 in the left-right direction.

[0044] When the press head 10a is further pressed down with the nozzle hole 74 open, the head body 10b and the mounting tube member 50 move downward together, and the stem 42 is pressed down. As a result, the contents that have been sucked up from inside the container body 20 into the cylinder 41 in advance pass through the inside of the stem 42 and flow into the inside of the valve chamber 10c through the inside of the mounting tube 53, the inside of the sliding tube 54, the through hole 92d, and the inside of the hanging tube 63. The contents that flow into the inside of the valve chamber 10c are discharged forward from the nozzle hole 74. Note that the resin spring portion 55 is elastically deformable with a force smaller than that of the spring (not shown) that biases the stem 42 upward, so that the stem 42 can be prevented from being pressed down before the resin spring portion 55 is deformed. As a result, the stem 42 can be prevented from being pressed down and the inside of the cylinder 41 can be prevented from being pressurized before the nozzle hole 74 is opened.

[0045] When the pressing head 10a is released from being pressed down, the stem 42 is pushed upward by a spring (not shown) in the cylinder 41, so that the entire pressing head 10a is pushed upward, and the resin spring portion 55 is deformed to restore its original shape, so that the head body 10b is pushed upward with respect to the mounting tube member 50. When the head body 10b moves upward relative to the mounting tube member 50, the rotating portion 91 moves upward with respect to the second extending portion 92 while rotating around the rotation axis R. At this time, the rotating portion 91 rotates counterclockwise around the rotation axis R as viewed from the direction in which the dispenser 10 is viewed in FIGS. 1 and 2. When the rotating portion 91 rotates in this direction, the first extending portion 84 meshing with the rotating portion 91 moves forward. As a result, the valve member 80 moves forward, and the nozzle hole 74 is closed again by the front end portion 81a of the valve body portion 81.

[0046] According to this embodiment, the valve member 80 has a valve body 81 that closes the nozzle hole 74, and a first extension 84 that extends rearward from the valve body 81. The movement mechanism 90 has a rotating part 91 that is disposed in the head body 10b and is rotatable about a rotation axis R that extends in the left-right direction, and moves the first extension 84 in the front-rear direction by rotating, and a second extension 92 that extends in the up-down direction and changes its relative position in the up-down direction with respect to the rotating part 91 as the rotating part 91 rotates. When the head body 10b moves downward with respect to the stem 42, the rotating part 91 moves downward relative to the second extension 92 and rotates in a direction that moves the first extension 84 rearward. Therefore, the mechanism formed by the first extension portion 84, the second extension portion 92, and the rotating portion 91 can convert the up-down movement of the head body 10b relative to the stem 42 into a front-rear movement and transmit it to the valve member 80. As a result, by pressing down the pressing head 10a, the valve member 80 can be easily and suitably moved backward to open the nozzle hole 74.

[0047] As described above, the valve member 80 can be moved backward by moving the head body 10b downward relative to the stem 42 using the mechanism formed by the first extension portion 84, the second extension portion 92, and the rotating portion 91, so that the valve member 80 can be moved forward by moving the head body 10b upward relative to the stem 42. Therefore, by providing the resin spring portion 55 that urges the head body 10b upward relative to the stem 42, when the pressing down of the pressing head 10a is released, the valve member 80 can be returned to a position that closes the nozzle hole 74 again by utilizing the restoring force of the resin spring portion 55. In other words, in order to return the valve member 80 to its original position, it is not necessary to provide a urging member that pushes the valve member 80 forward. This improves the degree of freedom in selecting the urging member, compared to, for example, a case in which a urging member for returning the valve member 80 to its original position is provided in the valve chamber 10c to urge the valve member 80 forward.

[0048] Specifically, in the past, for example, when a biasing member is provided in the valve chamber 10c to bias the valve member 80 forward, it was necessary to use a metal coil spring as the biasing member due to problems such as space restrictions and durability in the valve chamber 10c. However, according to this embodiment, the biasing member can be disposed below the head main body 10b, where a relatively large space can be easily secured, and the range of biasing members that can be used can be increased. Therefore, as in this embodiment, the biasing member can be a resin spring portion 55 made of resin. This allows the metal coil spring to be suitably replaced with the resin spring portion 55 made of resin. Therefore, according to this embodiment, the metal material used in the dispenser 10 can be reduced. In addition, since there is no need to provide a metal biasing member in the valve chamber 10c, there is no need to seal the valve chamber 10c to prevent the contents from contacting the biasing member. Therefore, the number of sealed locations in the dispenser 10 can be reduced. In this embodiment, by making the spring that biases the stem 42 upward from resin, the entire dispenser 10 can be made only from resin, and the entire dispenser container 100 including the dispenser 10 can be made only from resin.

[0049] Furthermore, according to this embodiment, the rotating portion 91 is a pinion gear, and the first extension portion 84 and the second extension portion 92 are rack gears that mesh with the rotating portion 91, which is a pinion gear. Therefore, the first extension portion 84, the second extension portion 92, and the rotating portion 91 can form a rack-and-pinion mechanism. This allows the valve member 80 to be stably moved by the rack-and-pinion mechanism. Therefore, by pressing down the pressing head 10a, the valve member 80 can be stably moved backward, and the nozzle hole 74 can be suitably opened.

[0050] Moreover, according to this embodiment, the press-down head 10a has a mounting tube member 50 that connects the head body 10b and the stem 42. The mounting tube member 50 has a top wall portion 51 and a mounting tube 53 that extends downward from the top wall portion 51 and is fitted into the upper end portion of the stem 42. The resin spring portion 55 is located between the top wall portion 51 and the head body 10b. Therefore, the resin spring portion 55 can suitably and easily bias the head body 10b upward relative to the stem 42.

[0051] Moreover, according to this embodiment, the resin spring portion 55 is a leaf spring disposed on the top wall portion 51. Therefore, the resin spring portion 55 is less likely to sag than when the resin spring portion 55 is a resin coil spring. This improves the durability of the resin spring portion 55. Also, the top wall portion 51 and the resin spring portion 55 can be easily molded integrally by injection molding or the like. Therefore, the number of parts of the dispenser 10 can be reduced compared to when the resin spring portion 55 is a separate member from the top wall portion 51.

[0052] Furthermore, according to this embodiment, the first extension portion 84 is located above the rotating portion 91. The second extension portion 92 is located in front of the rotating portion 91. Therefore, the rotating portion 91 can be positioned so as not to interfere with the valve main body 81, and the first extension portion 84 can be moved rearward by moving the rotating portion 91 downward. According to the present embodiment, the head body 10b includes a head portion 60 having a storage hole portion 61a that opens forward, and a nozzle tube 70 having a nozzle hole 74 and inserted into the storage hole portion 61a from the front. The nozzle tube 70 includes an opposing portion 73 extending in the front-rear direction. The opposing portion 73 is disposed facing the upper portion of the first extension portion 84. Therefore, the opposing portion 73 can prevent the first extension portion 84 from moving upward. This can prevent the first extension portion 84 from moving upward and coming off the rotating portion 91. In addition, since a space in which the opposing portion 73 is disposed is provided between the first extension portion 84 and the upper inner wall surface 61e of the storage hole portion 61a, when the valve member 80 is inserted into the storage hole portion 61a, the first extension portion 84 can be inserted above the rotating portion 91 without contacting the rotating portion 91, i.e., without engaging with the rotating portion 91. In this case, after the first extension portion 84 is inserted above the rotating portion 91, the valve member 80 is moved downward so that the first extension portion 84 comes into contact with and engages with the rotating portion 91. This makes it easy to assemble the dispenser 10.

[0053] According to the present embodiment, the first extension portion 84 has a first rack gear portion 83 that extends in the front-rear direction and meshes with the rotating portion 91. The first rack gear portion 83 is provided in a pair with a gap in the left-right direction. Therefore, the rotating portion 91 and the first extension portion 84 can be stably meshed, and the first extension portion 84 can be suitably moved in the front-rear direction by the rotation of the rotating portion 91. The second extension portion 92 has a second rack gear portion 92b that extends in the up-down direction and meshes with the rotating portion 91. The second rack gear portion 92b is located between the pair of first rack gear portions 83 when viewed from the up-down direction. Therefore, when the head body 10b moves downward relative to the second extension portion 92, the upper end portion of the second rack gear portion 92b can pass between the pair of first rack gear portions 83. This makes it possible to suppress interference between the second extension portion 92 and the first extension portion 84.

[0054] The present invention is not limited to the above-described embodiment, and the following configurations may also be adopted. The resin spring part may have any configuration as long as it biases the head body upward. The resin spring part does not have to be a leaf spring, and may be a resin coil spring. The resin spring part may be disposed on the top wall part of the mounting tube member. The resin spring part may be a separate member from the top wall part of the mounting tube member and the head body. Also, the mounting tube member may not be provided, and the resin spring part may be disposed between the mounting cap for mounting the dispenser to the container body and the head body in the up-down direction. In this case, the second extension part of the moving mechanism part is, for example, directly attached to the stem. The number of the resin spring parts is not particularly limited as long as it is one or more. The positional relationship between the first extension, the second extension, and the rotating part may be any positional relationship as long as the rotating part moves downward relative to the second extension and rotates in a direction that moves the first extension backward when the head body moves downward relative to the stem. The rotating part, the first extension, and the second extension may not be gears. The rotating part may be a friction wheel that contacts the first extension and the second extension, and the rotating part, the first extension, and the second extension may be configured to be able to transmit power to each other by frictional force. In addition, the rotating part, the first extension, and the second extension may each have a wing-shaped part and be configured to be able to transmit power to each other via the wing-shaped part. The configurations described in this specification can be combined with each other within the scope of not being mutually inconsistent. [Explanation of symbols]

[0055] 10...discharger, 10a...press-down head, 10b...head body, 42...stem, 50...mounting tube member, 51...top wall portion, 53...mounting tube, 55...resin spring portion, 60...head portion, 61a...accommodating hole portion, 70...nozzle tube, 73...opposing portion, 74...nozzle hole, 80...valve member, 81...valve body portion, 84...first extension portion, 90...moving mechanism portion, 91...rotating portion, 92...second extension portion, R...rotating shaft

Claims

1. A dispenser having a push-down head attached to a stem that stands up and can be pushed in in an upward biased state, The pressing head comprises: a head body having a nozzle hole that opens forward and communicates with the inside of the stem; a valve member that closes the nozzle hole; a movement mechanism for moving the valve member in a front-rear direction; having the head body is movable downward relative to the stem, The valve member is disposed inside the head body, The valve member is a valve body portion that closes the nozzle hole; a first extension portion extending rearward from the valve body portion; having The moving mechanism unit is a rotating part that is disposed on the head body, is rotatable about a rotation axis extending in a left-right direction, and moves the first extension part in a front-rear direction by rotating; A second extension portion that extends in a vertical direction and whose relative position in the vertical direction with respect to the rotating portion changes with rotation of the rotating portion; having the rotating portion moves downward relative to the second extending portion when the head body moves downward relative to the stem, and rotates in a direction that moves the first extending portion rearward; The ejector is provided with a resin spring portion that urges the head body upward relative to the stem.

2. the rotating portion is a pinion gear, The dispenser of claim 1 , wherein the first extension and the second extension are rack gears that mesh with the pinion gear.

3. the pressing head has a mounting tube member that connects the head body and the stem, The mounting tube member is A ceiling wall portion and a mounting tube extending downward from the top wall portion and fitted into an upper end portion of the stem; having The ejector according to claim 1 , wherein the resin spring portion is located between the top wall portion and the head main body.

4. The first extension portion is located above the rotating portion, The second extension portion is located in front of the rotating portion, The head body includes: A head portion having a receiving hole portion opening forward; a nozzle cylinder having the nozzle hole and inserted into the accommodation hole from the front; having The nozzle cylinder has an opposing portion extending in a front-rear direction, The discharge device according to claim 1 , wherein the facing portion is disposed above and facing the first extending portion.

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