Ejector

Abstract

To provide a discharge tool capable of easily detaching an energization member in a cylinder.SOLUTION: A discharge tool 13 comprises: a stem 22 arranged inside an opening part in a container body to be movable downward in an upward-energizing state; a cylindrical cylinder 18 which is mounted with a fitting cap 33 fitted to the opening part and into which the stem 22 is inserted; a piston 23 which is linked with vertical motion of the stem 22 in the cylinder 18 and is fitted in an inner peripheral surface of the cylinder 18 while slidable vertically; a discharge head 34 which is mounted on an upper end part of the stem 22 and has a discharge port for discharging a content; an energization member 20 which is arranged in the cylinder 18 to energize the stem 22 upward; and a blocking member 25 which is fitted in the cylinder 18 in a state where the stem 22 is inserted and blocks the upper end opening of the cylinder 18. The cylinder 18 comprises an engagement part for engaging with a screw part in a state where an outer shape of the screw part formed in the blocking member 25 is transferred.SELECTED DRAWING: Figure 2

Description

[Technical Field]

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

[0002] A dispensing container has a configuration in which a dispenser is attached to the opening of a container body. For example, Patent Document 1 below discloses a dispenser including a dispensing head, a stem, a cylinder in which the stem is arranged so as to be movable up and down, a piston member slidably arranged within the cylinder, and a biasing member that biases the stem upward. With this dispenser, by pressing down the dispensing head, the contents in the cylinder can be dispensed via the dispensing head, and the contents can be sucked up into the cylinder as the biasing member, such as a coil spring, restores its shape upward. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-274983 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, when disposing of waste, waste is generally separated according to type before disposal in order to, for example, reduce environmental impact and improve waste disposal efficiency. From this perspective, when disposing of a used dispenser, if the coil spring, which is often made of metal, is still attached, the entire dispenser falls under the category of so-called non-burnable waste, even if the other components are made of synthetic resin. For this reason, it is desirable to separate the metal coil spring from the other components made of synthetic resin before disposal.

[0005] However, in conventional dispensers, the coil spring is installed in a space below the stem inside a cylindrical cylinder with a bottom, which makes it difficult to easily remove the coil spring when disposing of the dispenser, making it difficult to meet the above-mentioned needs.

[0006] One aspect of the present invention has been made to solve the above problem, and one of its objects is to provide a dispenser in which the biasing member inside the cylinder can be easily removed when discarded. [Means for solving the problem]

[0007] In order to achieve the above object, one embodiment of the dispenser of the present invention comprises: a stem arranged inside the mouth of the container body so as to be movable downward while being biased upward; a cylindrical cylinder to which an attachment cap is attached to the mouth and into which the stem is inserted; a piston that is linked to the up and down movement of the stem within the cylinder and is fitted to the inner surface of the cylinder so as to be able to slide up and down; a dispenser head attached to the upper end of the stem and having a discharge port for discharging the contents; a biasing member that is arranged within the cylinder and biases the stem upward; and a closing member that is fitted into the cylinder with the stem inserted and closes the upper end opening of the cylinder, and the cylinder has an engaging portion that engages with the threaded portion formed on the closing member with the outer shape of the threaded portion transferred thereto.

[0008] In one aspect of the dispenser of the present invention, the upper end opening of the cylinder can be opened by disengaging the cylinder from the closing member. This allows the biasing member disposed in the cylinder to be removed from the constituent components of the dispenser. Therefore, the biasing member can be easily removed when disposing of the dispenser, and the biasing member can be separated from the other constituent components. This contributes to reducing environmental impact and improving waste disposal efficiency. Furthermore, because the threaded portion of the closing member engages with the engaging portion of the cylinder, the closing member can be easily removed from the cylinder by rotating the closing member and the cylinder relative to each other in the direction of release. This allows the biasing member to be easily removed.

[0009] In particular, according to one aspect of the dispenser of the present invention, the outer shape of the threaded portion of the closure member is transferred to the cylinder by fitting the closure member into the cylinder, eliminating the need to pre-form the threaded shape on the cylinder. For example, simply by fitting the closure member into the cylinder by capping or the like, the outer shape of the threaded portion of the closure member can be easily transferred to the cylinder. This improves manufacturing efficiency and reduces manufacturing costs.

[0010] In one aspect of the dispenser of the present invention, the cylinder may comprise a tubular portion located within the mounting cap, and a vertical rib that protrudes radially inward from the inner surface of the tubular portion and extends in the vertical direction, and the engaging portion may be formed by transferring the outer shape of the threaded portion onto the vertical rib.

[0011] This configuration reduces the contact area between the cylinder and the threaded portion compared to when the outer shape of the threaded portion is transferred to the entire circumference of the cylinder, thereby increasing the surface pressure acting between the longitudinal rib of the cylinder and the threaded portion, thereby allowing the outer shape of the threaded portion to be transferred to the cylinder well.

[0012] In the dispenser according to one aspect of the present invention, the closing member may be made of a material harder than the cylinder.

[0013] According to this configuration, when the closing member is fitted to the cylinder, deformation of the threaded portion can be suppressed and the outer shape of the threaded portion can be transferred satisfactorily to the cylinder. [Effects of the Invention]

[0014] According to one aspect of the present invention, it is possible to provide a dispenser in which the biasing member in the cylinder can be easily removed when discarded. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a vertical cross-sectional view showing a partly broken away state of a dispenser of a first embodiment. [Figure 2] FIG. 2 is a vertical cross-sectional view showing the dispenser in an exploded state. [Figure 3] FIG. 2 is an enlarged longitudinal cross-sectional view of a main part of the dispenser. [Figure 4] FIG. 10 is a vertical cross-sectional view showing a partly broken away dispenser of a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] [First embodiment] A first embodiment of the present invention will be described below with reference to FIGS. In the following description, a description will be given of a discharge container in a state where a discharger according to one embodiment of the present invention is attached to a container body. Fig. 1 also shows a discharge container in a state where the discharge head is not pressed down, i.e., where the cylinder is not pressurized. Hereinafter, the position shown in Fig. 1 may be referred to as the rising end position of the stem.

[0017] 1 and 2, the dispensing container 10 includes a cylindrical container body 11 with a bottom, and a dispenser 13 detachably attached to an opening 12 of the container body 11. The container body 11 is configured to be able to contain contents. The contents are liquids such as shampoo, body soap, cosmetics, etc.

[0018] The dispenser 13 includes a pump mechanism 15 and an exterior member 16 attached to the pump mechanism 15. The pump mechanism 15 includes a pump module 17, a cylinder 18 into which the pump module 17 is inserted, a lower valve body 19, and a biasing member 20. The exterior member 16 includes an attachment cap 33 and a discharge head 34.

[0019] The pump module 17 includes a stem 22, a piston 23, a piston guide 24, and a closing member 25. Of the pump mechanism 15, at least the stem 22, the piston 23, and the cylinder 18 are formed into a cylindrical shape and arranged coaxially on a common axis. Hereinafter, this common axis will be referred to as the axis O, and the direction along the axis O will be referred to as the vertical direction. Within the vertical direction, the direction from the bottom of the container body 11 toward the dispenser 13 will be referred to as the upward direction, and the direction from the dispenser 13 toward the bottom of the container body 11 will be referred to as the downward direction. In a plan view seen from the vertical direction, the direction intersecting the axis O will be referred to as the radial direction, and the direction circumferential around the axis O will be referred to as the circumferential direction.

[0020] Cylinder 18 is formed as a multi-stage cylinder with multiple tapered sections so that the outer diameter gradually increases as it moves upward. Specifically, cylinder 18 is formed integrally with an attachment cylinder 27, a storage cylinder 28, a sliding cylinder 29, and a protruding cylinder 30 (cylinder section) that are connected from bottom to top. In addition, a suction cylinder 31 is attached to attachment cylinder 27 in a fitted state. The lower end opening of suction cylinder 31 extends to a position close to the bottom of container body 11.

[0021] The lower valve body 19 is accommodated inside the accommodation cylinder 28. The piston 23 is slidably accommodated inside the sliding cylinder 29. An introduction hole 29h that penetrates the sliding cylinder 29 in the radial direction is formed in the upper part of the sliding cylinder 29. The protruding cylinder 30 is located inside the attachment cap 33. A flange portion 36 that protrudes radially outward is formed on the upper opening edge of the protruding cylinder 30. The flange portion 36 is formed around the entire circumference of the protruding cylinder 30. When the dispenser 13 is attached to the container body 11, the flange portion 36 is positioned on the upper opening edge of the mouth portion 12 with a gasket 37 sandwiched therebetween.

[0022] 3, a vertical rib 39 is formed on the inner peripheral surface of the protruding tube 30. The vertical rib 39 protrudes radially inward of the protruding tube 30 and extends in the up-down direction. An engaging portion 40 is formed on the vertical rib 39 to engage with the threaded portion of the closing member 25. The configuration of the engaging portion 40 will be described in detail later.

[0023] As shown in Figures 1 and 2, the lower valve element 19 is housed inside the housing cylinder 28. The lower valve element 19 has a valve body 42 and a sliding portion 43. The valve body 42 is supported at the lower part inside the housing cylinder 28 and has a support protrusion 44 that protrudes radially outward. The support protrusion 44 abuts against the inner circumferential surface of the housing cylinder 28, supports the lower end of the biasing member 20, and restricts downward movement of the biasing member 20. The sliding portion 43 is formed above the valve body 42 and has a smaller diameter than the valve body 42.

[0024] Lower valve element 19 functions as a check valve that closes the lower end opening of cylinder 18 when the pressure inside cylinder 18 is increased, and opens the lower end opening of cylinder 18 when the pressure inside cylinder 18 is reduced. That is, when the pressure inside cylinder 18 is increased, lower valve element 19 abuts against the inner circumferential surface of storage tube 28, preventing the contents inside cylinder 18 from flowing out into container body 11 through the lower end opening of storage tube 28. On the other hand, when the pressure inside cylinder 18 is reduced, lower valve element 19 rises and moves away from the inner circumferential surface of storage tube 28, allowing the contents inside container body 11 to flow into cylinder 18 through the lower end opening of storage tube 28.

[0025] The piston guide 24 is configured to be able to move up and down together with the stem 22 within the cylinder 18. The piston guide 24 has a mounting portion 46 and a piston support portion 47 formed below the mounting portion 46.

[0026] The mounting portion 46 is formed in a cylindrical shape extending in the vertical direction. A communication port 46h is formed in a part of the mounting portion 46, which connects the outer space and inner space of the piston guide 24. As shown in Fig. 1, the piston support portion 47 supports the lower end of the piston 23 when the discharge head 34 is not pressed down, but when the discharge head 34 is pressed down, the piston support portion 47 moves away from the lower end of the piston 23 as the mounting portion 46 moves down.

[0027] The stem 22 is inserted into the sliding tube 29 of the cylinder 18 from above the cylinder 18. The stem 22 is disposed inside the mouth 12 when the dispenser 13 is attached to the container body 11. The stem 22 is configured to be movable downward within the cylinder 18 while being biased upward by the biasing member 20. The stem 22 includes a lower tube portion 49 and an upper tube portion 50 formed with a smaller diameter than the lower tube portion 49.

[0028] The lower cylindrical portion 49 surrounds the mounting portion 46 of the piston guide 24. A gap is formed between the inner peripheral surface of the lower cylindrical portion 49 and the outer peripheral surface of the mounting portion 46 over the entire circumferential direction. A step 52 is formed radially inward at the edge of the upper opening of the lower cylindrical portion 49. In the illustrated example, the step 52 is tapered so that its diameter decreases radially inward as it extends upward. The step 52 may also protrude in a direction perpendicular to the axis O. The upper cylindrical portion 50 extends upward from the upper end of the step 52. The mounting portion 46 of the piston guide 24 is fitted into the lower part of the upper cylindrical portion 50. Therefore, the piston guide 24 moves up and down in accordance with the up and down movement of the stem 22.

[0029] The piston 23 has a configuration in which an outer cylinder 54 and an inner cylinder 55 are connected by a connecting portion 56. The outer diameter of the outer cylinder 54 increases from the vertical center toward both ends. The outer cylinder 54 is configured so that both vertical ends can slide up and down on the inner circumferential surface of the sliding cylinder 29. The inner cylinder 55 is fitted into the lower cylinder portion 49 of the stem 22 so as to be slidable up and down.

[0030] When the stem 22 is at the raised end position, the piston 23 closes the introduction hole 29h of the cylinder 18 with the outer cylinder 54. Specifically, the upper end of the outer cylinder 54 abuts against the upper side of the introduction hole 29h of the sliding cylinder 29, and the lower end of the outer cylinder 54 abuts against the lower side of the introduction hole 29h of the sliding cylinder 29, thereby closing the introduction hole 29h.

[0031] The biasing member 20 is interposed between the piston guide 24 and the lower valve body 19 inside the cylinder 18. The biasing member 20 is formed, for example, by a coil spring. The biasing member 20 is provided in the cylinder 18 so as to surround the periphery of the lower valve body 19. The lower end of the biasing member 20 is supported by the upper surface of the support protrusion 44 of the lower valve body 19. The upper end of the biasing member 20 is supported by the lower surface of the piston support portion 47. The biasing member 20 biases the stem 22 upward via the piston guide 24.

[0032] The biasing member 20 is made of a material that must be separated from the other components of the dispenser 13 when disposed of. Considering ease of manufacturing and physical properties such as a tendency for the restoring force to remain stable even when compressed for a long period of time, it is preferable to use a metal as such a material. In this embodiment, the other components are made of a synthetic resin material. The biasing member 20 is not limited to a coil spring.

[0033] 3, the closing member 25 is fitted into the cylinder 18 with the stem 22 inserted therethrough. The closing member 25 has an upper cylinder portion 58 that surrounds the periphery of the upper cylinder portion 50 of the stem 22, a lower cylinder portion 59 that surrounds the periphery of the lower cylinder portion 49 of the stem 22, and a flange portion 60 formed between the upper cylinder portion 58 and the lower cylinder portion 59.

[0034] In this embodiment, the closing member 25 is made of a synthetic resin material that is harder than the cylinder 18. Specifically, the cylinder 18 is made of, for example, polypropylene (PP), while the closing member 25 is made of, for example, polyethylene terephthalate (PET), polyacetal (POM), polybutylene terephthalate (PBT), or the like.

[0035] The upper tube portion 58 is formed with vertical ribs 62 that protrude radially outward and extend in the up-down direction. The vertical ribs 62 are engaged with locking portions 63 formed on the inner peripheral surface of the mounting cap 33, thereby preventing the closing member 25 from rotating relatively to the mounting cap 33. The lower tube portion 59 has a threaded portion 64 formed on its inner peripheral surface that abuts against the outer peripheral surface of the protruding tube 30 of the cylinder 18.

[0036] The flange portion 60 protrudes radially outward from the outer periphery of the upper end of the lower tube portion 59 and abuts against the top wall of the protruding tube 30 of the cylinder 18. The inner circumferential surface of the flange portion 60 is tapered so that its diameter decreases radially inward as it extends upward, corresponding to the step portion 52 of the stem 22.

[0037] As described above, a plurality of vertical ribs 39 are formed on the outer peripheral surface of the protruding tube 30 of the cylinder 18. The plurality of vertical ribs 39 are formed at intervals in the circumferential direction. When the protruding tube 30 is fitted into the inside of the closure member 25 by capping during the manufacturing process of the dispenser 13, the vertical ribs 39 are pressed radially inward by the threads of the threaded portion 64 of the closure member 25. In other words, the vertical ribs 39 are capped into the inside of the closure member 25 in a state where they are deformed by the threads of the threaded portion 64. As a result, the vertical ribs 39 of the cylinder 18 are formed with engagement portions 40 that are transferred to the outer shape of the threaded portion 64 of the closure member 25. The engagement portions 40 enter the thread grooves of the threaded portion 64 and engage with the threads in the vertical direction. This restricts the upward movement of the closure member 25 relative to the cylinder 18.

[0038] The portions of the vertical ribs 39 against which the threads are pressed may undergo creep deformation (plastic deformation) due to the action of sustained stress, and may recover and deform when the closing member 25 is removed from the cylinder 18. Furthermore, the vertical ribs 39 may be located radially outward from the threads and radially inward from the inner peripheral surface of the closing member 25 before the closing member 25 is plugged.

[0039] As shown in FIG. 1, the exterior member 16 is exposed to the outside of the dispenser 13 when the dispenser 13 is attached to the container body 11.

[0040] The attachment cap 33 has an insertion tube 66 and a cap body 67 formed with a diameter larger than that of the insertion tube 66. The above-mentioned closure member 25, stem 22, and piston guide 24 are inserted into the insertion tube 66. The cap body 67 is detachably screwed onto the opening 12 of the container body 11. In other words, the pump mechanism 15 is attached to the container body 11 via the attachment cap 33. Note that the attachment cap 33 may be attached to the opening 12 by a method other than screwing, such as undercut fitting.

[0041] The discharge head 34 includes an operating section 69, an attachment tube 70, an outer tube 71, and a discharge tube 72. The operating section 69 is a section where the user presses down the discharge head 34 with their hand, and is formed in the shape of a cylinder with a top.

[0042] The mounting tube 70 extends downward from the top wall of the operating portion 69. The mounting tube 70 is arranged in a cylindrical shape coaxially with the axis O. The upper part of the stem 22 is fitted to the lower part of the mounting tube 70 by plugging or the like. The outer tube 71 extends downward from the peripheral wall part of the discharge head 34 and surrounds the periphery of the insertion tube 66 of the mounting cap 33. When the discharge head 34 is pressed down, the lower end of the outer tube 71 abuts against the upper surface of the mounting cap 33. This restricts the lowered position of the discharge head 34, i.e., the lower end position of the stem 22.

[0043] The discharge tube 72 is formed to radially penetrate the peripheral wall of the operating part 69 and the outer tube 71. The radial inner opening of the discharge tube 72 communicates with the interior of the mounting tube 70. The radial outer opening of the discharge tube 72 forms a discharge port 72a that communicates with the internal space of the stem 22 through the mounting tube 70 and the discharge tube 72.

[0044] In addition, the outer peripheral surface of the sliding tube 29 of the cylinder 18 is knurled to form anti-slip irregularities 74. In the illustrated example, a plurality of protruding stripes extending in the vertical direction are formed as the irregularities, but the shape of the irregularities is not particularly limited.

[0045] A method for discharging the contents using the dispensing container 10 having the above-described configuration will be described below. 1, when the discharge head 34 is not pressed down, the piston guide 24, piston 23, stem 22, and discharge head 34 are in their raised positions due to the upward biasing force of the biasing member 20. At this time, the pressure inside the cylinder 18 is reduced relative to the pressure when the discharge head 34 is pressed down, and the lower valve body 19 moves away from the inner circumferential surface of the cylinder 18, opening the lower end opening of the cylinder 18. As a result, the contents inside the container body 11 flows into the cylinder 18 through the suction tube 31. In addition, the outer tube 54 of the piston 23 closes the introduction hole 29h of the cylinder 18.

[0046] When the discharge head 34 is pressed down from this state, the stem 22 and the piston guide 24 move downward without moving the piston 23, and the lower end of the stem 22 comes into contact with the piston 23, and the piston support portion 47 of the piston guide 24 moves away from the piston 23. As a result, the space between the piston 23 and the piston guide 24 communicates with the internal space of the stem 22 via the communication port 46h.

[0047] Thereafter, as the stem 22 and piston guide 24 move further downward, the piston 23 also moves downward together with the stem 22 and piston guide 24. As a result, the piston 23 moves downward away from the introduction hole 29h, and the contents in the cylinder 18 pass through the gap between the piston guide 24 and the cylinder 18, and flow from the space between the piston 23 and the piston guide 24 through the communication port 46h into the stem 22. As a result, the contents in the stem 22 pass through the inside of the discharge tube 72 of the discharge head 34 and are discharged from the discharge port 72a.

[0048] Next, when the pressing down of the discharge head 34 is released, the discharge head 34 is pushed up by the upward biasing force of the biasing member 20. As a result, the stem 22, piston guide 24, and piston 23 move upward and return to their original position together with the discharge head 34. At this time, as the stem 22 etc. move upward, the contents in the container body 11 flow into the cylinder 18 through the suction tube 31, as described above.

[0049] Next, a method for disassembling the dispenser 13 will be described. It is preferable that the disassembly of the dispenser 13 be carried out with the dispenser 13 removed from the container body 11. 1, with the dispenser 13 at its uppermost position, for example, the cylinder 18 and the mounting cap 33 are gripped and rotated relative to the dispenser 13 about the axis O. At this time, since the closure member 25 is configured to be unable to rotate relative to the mounting cap 33 as described above, the closure member 25 fixed to the mounting cap 33 rotates relative to the cylinder 18, and the fastening between the threaded portion 64 and the engaging portion 40 is released. By releasing the fastening between the threaded portion 64 and the engaging portion 40, the closure member 25 becomes movable up and down relative to the cylinder 18 with the stem 22 inserted.

[0050] As shown in FIG. 2 , the mounting cap 33 and the discharge head 34 are pulled upward from the cylinder 18, thereby removing the pump module 17, which includes the stem 22, piston 23, piston guide 24, and closing member 25. In this embodiment, the upper end of the biasing member 20 is engaged with a spring engaging portion 48 formed on the piston support portion 47 of the piston guide 24. The spring engaging portion 48 is formed, for example, in the shape of a vertical rib extending in the vertical direction. This allows the biasing member 20 to be easily removed from the cylinder 18 along with the pump module 17, which includes the stem 22, piston 23, piston guide 24, and closing member 25. This configuration allows the biasing member 20 to be easily separated from the piston guide 24. In this manner, the biasing member 20, which needs to be separated, can be removed from the components of the dispenser 13. The biasing member 20 is then separated from the other components and discarded.

[0051] Note that even if the spring engaging portion 48 is provided, the biasing member 20 may remain in the cylinder 18 when the pump module 17 is pulled out from the cylinder 18. Furthermore, the biasing member 20 does not necessarily have to be engaged with the piston guide 24, i.e., the pump module 17, and may be configured to remain in the cylinder 18 when the pump module 17 is pulled out from the cylinder 18. Even with this configuration, there are no various components above the biasing member 20, so the biasing member 20 can be easily removed from inside the cylinder 18.

[0052] For example, if the above-mentioned closure member 25 were configured to be fixed to the cylinder 18 by means of undercut fitting or the like, there would be a problem in that it would be difficult to easily remove the urging member 20 arranged in the cylinder 18, and it would be difficult to separate the urging members 20. To address this problem, in the dispenser 13 of this embodiment, as described above, the cylinder 18 is provided with the engaging portion 40 that engages with the threaded portion 64 formed on the closure member 25, with the external shape of the threaded portion 64 transferred to it.

[0053] According to this configuration, the upper end opening of the cylinder 18 can be opened by releasing the fastening between the cylinder 18 and the closing member 25. This allows the biasing member 20 arranged in the cylinder 18 to be removed from the constituent members of the dispenser 13. Therefore, the biasing member 20 can be easily removed when disposing of the dispenser 13, and the biasing member 20 can be separated from the other constituent members. As a result, the dispenser 13 of this embodiment can contribute to reducing environmental impact and improving waste disposal efficiency. Furthermore, because the threaded portion 64 formed on the closing member 25 is engaged with the engaging portion 40 of the cylinder 18, the closing member 25 can be easily removed from the cylinder 18 by rotating the closing member 25 and the cylinder 18 relative to each other in the direction of release. This allows the biasing member 20 to be easily removed.

[0054] In particular, according to the dispenser 13 of this embodiment, the outer shape of the threaded portion 64 of the closure member 25 can be transferred to the cylinder 18 by fitting the closure member 25 into the cylinder 18, eliminating the need to form a threaded portion in the cylinder 18 in advance. For example, simply by fitting the closure member 25 into the cylinder 18 by capping or the like, the outer shape of the threaded portion 64 of the closure member 25 can be easily transferred to the cylinder 18. Therefore, there is no need to prepare equipment for forming a threaded portion in the cylinder 18, which improves the manufacturing efficiency of the dispenser 13 and reduces manufacturing costs.

[0055] Furthermore, in the dispenser 13 of this embodiment, the cylinder 18 protrudes radially from the protruding tube 30 and has a vertical rib 39 extending in the vertical direction, and the engagement portion 40 is formed by transferring the outer shape of the screw portion 64 to the vertical rib 39. According to this configuration, the contact area between the cylinder 18 and the threaded portion 64 can be made smaller than when the outer shape of the threaded portion 64 is transferred over the entire circumference of the cylinder 18. This makes it possible to increase the surface pressure acting between the longitudinal ribs 39 of the cylinder 18 and the threaded portion 64. This allows the outer shape of the threaded portion 64 to be transferred to the cylinder 18 well.

[0056] In the dispenser 13 of this embodiment, the closing member 25 is made of a synthetic resin material that is harder than the cylinder 18 . According to this configuration, when the closing member 25 is fitted to the cylinder 18, the outer shape of the threaded portion 64 can be transferred satisfactorily to the cylinder 18 while suppressing deformation of the threaded portion 64.

[0057] [Second embodiment] A second embodiment of the present invention will be described below with reference to FIG. The basic configuration of the dispenser of the second embodiment is the same as that of the first embodiment, but the configuration of the cylinder is different from that of the first embodiment, so an overall description of the dispenser of this embodiment will be omitted. FIG. 4 is a vertical cross-sectional view showing a part of a dispenser according to a second embodiment in a cutaway state. In FIG. 4, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted.

[0058] In the discharge container 80 of this embodiment, the discharger 83 includes a pump mechanism 85 and an exterior member 16 attached to the pump mechanism 85. The pump mechanism 85 includes a pump module 17, a cylinder 87 in which the pump module 17 is inserted, a lower valve body 19, and a biasing member 20.

[0059] In dispenser 13 of the first embodiment, the outer peripheral surface of cylinder 18 is knurled, whereas in dispenser 83 of this embodiment, the outer peripheral surface of the sliding tube of cylinder 87 is not knurled, and the outer peripheral surface functions as display unit 87f, which is a smooth, curved surface without any irregularities. Display unit 87f can display, for example, an indication that the user is gripping display unit 87f, an arrow indicating relative rotation, etc. Furthermore, in addition to being displayed by printing, display unit 87f can also be engraved with a mold. Other configurations of the dispenser 83 are similar to those of the dispenser 13 of the first embodiment.

[0060] When disassembling the dispenser 83 of this embodiment, similarly to the first embodiment, the cylinder 87 and the attachment cap 33 may be rotated relative to each other about the axis O. In this case, for example, the outer peripheral surface 87f of the cylinder 87 may be grasped, and the attachment cap 33 side, i.e., the ejection head 34 side, may be rotated in the direction indicated by the arrow D.

[0061] The dispenser 83 of this embodiment also has the same effects as the first embodiment, such as being able to reduce environmental impact, improve waste disposal efficiency, improve manufacturing efficiency of the dispenser 83, and reduce manufacturing costs.

[0062] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in the above embodiment, a configuration in which vertical ribs are formed on the cylinder and the outer shape of the threaded portion of the closing member is transferred to the vertical ribs is described, but this configuration is not necessarily limited to this. For example, the outer shape of the threaded portion may be transferred to the outer peripheral surface of the cylinder where no vertical ribs exist.

[0063] Furthermore, the number, shape, arrangement, etc. of the various components of the dispenser are not limited to those in the above embodiment and can be modified as appropriate. [Explanation of symbols]

[0064] 11 Container body 12 Mouth 13,83 Dispenser 18.87 cylinders 20 biasing member 22 Stem 23 Piston 25 Closure element 30 Projecting tube (cylindrical part) 33 Mounting cap 34 Discharge head 39 Vertical ribs 40 Engagement portion 64 Threaded section

Claims

1. a stem disposed inside the mouth of the container body and movable downward in an upward biased state; a cylindrical cylinder to which an attachment cap is attached to the mouth portion and into which the stem is inserted; a piston that is linked to the up and down movement of the stem within the cylinder and is fitted to the inner circumferential surface of the cylinder so as to be able to slide up and down; a discharge head attached to an upper end of the stem and having a discharge port for discharging the contents; a biasing member disposed within the cylinder and biasing the stem upward; a closing member that is fitted to the cylinder with the stem inserted therethrough and closes an upper end opening of the cylinder, The cylinder has an engaging portion that engages with the threaded portion formed on the closing member with the outer shape of the threaded portion transferred thereto.

2. The cylinder is a cylindrical portion located within the mounting cap; a vertical rib that protrudes radially inward from an inner circumferential surface of the cylindrical portion and extends in the up-down direction, The dispenser according to claim 1 , wherein the engaging portion is formed by transferring an outer shape of the threaded portion onto the longitudinal rib.

3. 3. The dispenser according to claim 1, wherein the closing member is made of a material harder than that of the cylinder.

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