Discharge device

Abstract

To provide a discharge device securing sealability between a fitting cylindrical part and an upper tip of a stem even when the fitting cylindrical part or the stem are swelled.SOLUTION: A discharge device 1 comprises: a pump 10 having a stem 11 arranged movably downward under an upward energized state on a mouth part of the container body W in which content fluid is received; and a depressing head 12 having a fitting cylindrical part 12a fitted in an upper part of the stem, in which a nozzle hole 12c is formed, to discharge the content fluid from the nozzle hole through the stem through driving the pump by moving the stem downward by depressing the depressing head in a state the mouth part is attached, wherein the depressing head is formed using polyolefin resin, and a support ring 21 which is another part from the stem and the depressing head is jacketed on the upper end part of the stem and a fitting part of the cylindrical part.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 pump having a stem that is biased upward and movable downward at the mouth of a container body that contains the liquid content, and a push-down head that has a fitting tubular portion that is fitted to the upper end of the stem and has a nozzle hole formed therein, and that, when attached to the mouth, pushes down the push-down head to move the stem downward and operate the pump, thereby discharging the liquid content through the stem and from the nozzle hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-41269 Summary of the Invention [Problem to be solved by the invention]

[0004] Depending on the type of liquid contained, the fitting cylindrical portion or the stem may swell, making it difficult to ensure a seal between the fitting cylindrical portion and the upper end of the stem. As a means for solving such problems, for example, as shown in the above-mentioned Patent Document 1, a configuration is known in which either the fitting cylindrical portion of the pressing head or the upper end portion of the stem is formed into a double cylindrical shape, and one of them sandwiches the other from both radial sides. However, it is not possible to prevent swelling of the fitting cylindrical portion or the stem, and there is a risk that the sealing performance between the fitting cylindrical portion and the upper end portion of the stem may still not be ensured.

[0005] An object of the present invention is to provide a dispenser that can ensure a seal between the fitting tubular portion and the upper end of the stem even if the fitting tubular portion or the stem swells. [Means for solving the problem]

[0006] A dispenser according to one aspect of the present invention comprises a pump having a stem that is biased upward and movable downwardly at the mouth of a container body containing liquid contents, and a push-down head having a fitting tubular portion fitted to the upper end of the stem and having a nozzle hole formed therein; when attached to the mouth, the push-down head is pushed down to move the stem downward and operate the pump, thereby discharging the liquid contents through the stem and from the nozzle hole; the push-down head is made of polyolefin resin, and a support ring, which is a separate part from the stem and the push-down head, is attached to the fitting portion between the upper end of the stem and the fitting tubular portion.

[0007] A support ring, which is a separate part from the stem and the push-down head, is attached to the mating portion between the upper end of the stem and the mating tubular portion of the push-down head, making it possible to prevent the support ring from swelling due to the contents.Even if the mating tubular portion or the stem swells due to the contents, the support ring supports the mating portion between the upper end of the stem and the mating tubular portion of the push-down head from the outside in the radial direction, thereby ensuring sealing between the mating tubular portion and the upper end of the stem. Since the press-down head is formed from a polyolefin resin, the press-down head, which is the part of the dispenser that is exposed to the outside and is easily visible to the user, can be easily formed in a desired color tone.

[0008] A plurality of vertical ribs may be formed on the inner peripheral surface of the support ring at intervals in the circumferential direction, protruding radially inward and extending in the up-down direction.

[0009] Since multiple vertical ribs are formed at circumferential intervals on the inner surface of the support ring, it is possible to reduce the contact area between the inner surface of the support ring and the mating portion between the upper end of the stem and the mating cylindrical portion of the pressing head, and the support ring can be easily fitted onto the aforementioned mating portion with little pushing force.

[0010] The pressing head may include an outer cylindrical portion that surrounds the support ring from the outside in the radial direction, and a support protrusion that supports the support ring from below the support ring may be formed on the inner peripheral surface of the outer cylindrical portion.

[0011] A support protrusion that supports the support ring from below is formed on the inner surface of the outer cylindrical portion of the push-down head.Therefore, by inserting the support ring inside the outer cylindrical portion and supporting the support ring from below with the support protrusion, it is possible to handle the push-down head and fit the mating cylindrical portion onto the upper end of the stem, making it easy to assemble the dispenser. [Effects of the Invention]

[0012] According to this invention, even if the fitting cylindrical portion or the stem swells, the sealing performance between the fitting cylindrical portion and the upper end portion of the stem can be ensured. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a vertical cross-sectional view of a dispenser shown as a first embodiment. [Figure 2] 2A to 2C are explanatory views for explaining a method of manufacturing the dispenser of FIG. 1. [Figure 3] FIG. 10 is a vertical cross-sectional view of a dispenser shown as a second embodiment. [Figure 4] 4A to 4C are explanatory views for explaining a method of manufacturing the dispenser of FIG. 3. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a dispenser according to a first embodiment will be described with reference to the drawings. 1, the dispenser 1 according to this embodiment includes a pump 10 and a push-down head 12 having a nozzle hole 12c. The pump 10 includes a stem 11, a piston 13, a piston guide 14, and a cylinder 15. When the dispenser 1 is attached to the opening of a container body W containing the liquid content, the push-down head 12 is pushed down to move the stem 11 downward, thereby operating the pump 10, thereby discharging the liquid content through the stem 11 and from the nozzle hole 12c.

[0015] The stem 11, the piston 13, the piston guide 14, and the cylinder 15 are arranged with their respective central axes positioned on a common axis. Hereinafter, this common axis will be referred to as the central axis O, and the direction along the central axis O will be referred to as the vertical direction. Also, when viewed from the vertical direction, the direction intersecting the central axis O will be referred to as the radial direction, and the direction going around the central axis O will be referred to as the circumferential direction.

[0016] The pump 10 is attached to the container body W via an attachment cap 16. The attachment cap 16 is formed in the shape of a cylinder with a top having an annular top wall. An upwardly extending standing tube 16a is formed on the upper surface of the top wall. The standing tube 16a is formed in the radially middle portion of the top wall of the attachment cap 16. The standing tube 16a is formed in a double-cylinder shape having an inner tube portion and an outer tube portion, with the upper ends of the inner tube portion and the outer tube portion connected to each other in the radial direction and a radial gap provided between the lower ends of the inner tube portion and the outer tube portion. The mounting cap 16 has an internal thread formed on its inner peripheral surface to be threadedly engaged with an external thread formed on the outer peripheral surface of the mouth of the container body W. The mounting cap 16 is disposed coaxially with the central axis O.

[0017] The stem 11 is provided at the mouth of the container body W so as to be movable downward while being biased upward. The lower part of the stem 11 is inserted into the cylinder 15, and the upper part protrudes upward from the cylinder 15. The inner and outer diameters of the lower end of the stem 11 are larger than the inner and outer diameters of the portion located above the lower end.

[0018] A plurality of ridges 11a projecting radially inward are formed at intervals in the circumferential direction on the inner peripheral surface of a portion of the stem 11 located between the lower end and the upper end. The upper portions of the ridges 11a project radially inward more than the lower portions of the ridges 11a, and downward-facing steps 11c are formed in the vertically intermediate portions of the ridges 11a. A valve seat ring 11b is formed on the inner peripheral surface of the stem 11, protruding radially inward and extending continuously around the entire circumference. The valve seat ring 11b connects the upper edges of the multiple protrusions 11a in the circumferential direction. An upper valve element 19 is housed within the upper end of the stem 11. The upper valve element 19 is spherical and abuts against the upper surface of the valve seat ring 11b so as to be able to move upward. The upper valve element 19 is a check valve that allows the flow of content liquid from below to above, and restricts the flow of content liquid from above to below. The upper valve element 19 is not necessarily provided.

[0019] The piston 13 is housed in a cylinder 15 so as to be able to slide up and down. The piston 13 is formed in a cylindrical shape and is linked to the up and down movement of the stem 11. The piston 13 includes an outer cylinder piston 51, an inner cylinder piston 52, and an annular connecting portion 53. The outer cylinder piston 51, the inner cylinder piston 52, and the annular connecting portion 53 are each arranged coaxially with the central axis O. In the illustrated example, the outer cylinder piston 51, the inner cylinder piston 52, and the annular connecting portion 53 are integrally formed. The outer cylindrical piston 51 is fitted into the cylinder 15 so as to be able to slide up and down. The inner cylindrical piston 52 is disposed radially inside the outer cylindrical piston 51 and surrounds the piston guide 14 from the radial outside. The annular connecting portion 53 radially connects the outer cylindrical piston 51 and the inner cylindrical piston 52. The upper surface of the annular connecting portion 53 is spaced downward from the lower end opening edge of the stem 11. The lower end opening edge of the stem 11 abuts against the upper surface of the annular connecting portion 53 when the stem 11 moves downward.

[0020] The piston guide 14 is formed in a cylindrical shape with a top, protrudes downward from the stem 11, and penetrates the inside of the piston 13 in the vertical direction. The top of the piston guide 14 is fitted into the protrusion 11a of the stem 11. The upper surface of the top of the piston guide 14 abuts against the step 11c of the protrusion 11a. The lower end portion (hereinafter referred to as the protruding portion 14a) of the piston guide 14 is formed to have a larger diameter than the portion located above the protruding portion 14a, and is formed in the shape of a closed-top cylinder having an annular top wall. The lower end of the inner-cylindrical piston 52 is in releasable contact with the upper surface of the top wall of the protruding portion 14a. A sliding protrusion 24 that protrudes radially inward is formed on the inner circumferential surface of the top wall of the protruding portion 14a. The sliding protrusion 24 extends continuously around the entire circumference and has a curved shape that protrudes radially inward in a cross-sectional view along the vertical direction. The outer peripheral surface of the peripheral wall of the overhanging portion 14a abuts against or is close to the inner peripheral surface of the cylinder 15. A communicating vertical groove 25 is formed along the entire length in the vertical direction on the outer peripheral surface of the peripheral wall of the overhanging portion 14a. The upper end of the coil spring 17 is inserted into the peripheral wall of the overhanging portion 14a, and the edge of the upper end opening of the coil spring 17 is supported by the underside of the top wall of the overhanging portion 14a.

[0021] The portion of the cylinder 15 located below the piston guide 14 serves as a storage space A in which the liquid content in the container body W is temporarily stored. A flange 15a protruding radially outward is formed at the upper end of the cylinder 15. The flange 15a is fixed by undercut fitting into the upper end of the mounting cap 16. A connecting tube 15b extending downward is provided at the lower end of the cylinder 15. A suction pipe P is fitted into the connecting tube 15b. The lower end of the suction pipe P is located within the bottom of the container body W. A step 15e is formed on the inner peripheral surface of the lower portion of the cylinder 15, facing upward, and supporting the lower end opening edge of the coil spring 17. A plurality of vertical grooves 15c are formed in the step 15e at intervals in the circumferential direction. The vertical grooves 15c open upward and radially inward. The upper end openings of the vertical grooves 15c are covered by the lower end opening edge of the coil spring 17.

[0022] A seal cylinder 15d is tightly fitted into the upper end of the cylinder 15. The stem 11 is inserted into the seal cylinder 15d so as to be movable up and down. The upper end of the outer cylinder piston 51 of the piston 13 tightly contacts the edge of the lower opening of the seal cylinder 15d.

[0023] A lower valve element 18 is disposed within the cylinder 15. The lower valve element 18 is formed in a rod shape extending in the vertical direction and is disposed coaxially with the central axis O. The upper part of the lower valve element 18 is fitted within a sliding protrusion 24 of the piston guide 14 so as to be able to slide vertically. The lower part of the lower valve element 18 is formed with a plurality of wing portions 18a spaced apart in the circumferential direction, protruding radially outward and with their front and back surfaces facing the circumferential direction. The wing portions 18a are inserted into vertical grooves 15c of the cylinder 15. The lower end of the lower valve element 18 is spaced upward from the periphery of the lower-end opening on the inner surface of the cylinder 15. When the piston guide 14 moves downward, the sliding protrusion 24 moves the lower valve element 18 downward, causing the lower end of the lower valve element 18 to abut against the periphery of the lower-end opening on the inner surface of the cylinder 15, thereby blocking communication between the storage space A and the inside of the container body W.

[0024] The push-down head 12 includes a cylindrical fitting portion 12a having a top that is fitted to the upper end of the stem 11, and a nozzle portion 12b that protrudes radially outward from the fitting portion 12a. The stem 11 is fitted into the fitting portion 12a. The tip opening of the nozzle portion 12b forms a nozzle hole 12c through which the content liquid is ejected. The fitting portion 12a may be fitted into the stem 11.

[0025] A support ring 21, which is a separate part from the stem 11 and the press-down head 12, is fitted over the fitting portion between the upper end of the stem 11 and the fitting tubular portion 12a. The support ring 21 is fitted over the fitting tubular portion 12a. The support ring 21 is a cylindrical body that extends continuously around the entire circumference. The support ring may be C-shaped when viewed from above and below. The push-down head 12 has an outer cylindrical portion 12d that radially surrounds the support ring 21. The nozzle cylindrical portion 12b protrudes radially outward from the outer cylindrical portion 12d. The support ring may abut against both the mating portion between the upper end of the stem 11 and the mating cylindrical portion 12a and the inner circumferential surface of the outer cylindrical portion 12d.

[0026] A plurality of vertical ribs 21a that protrude radially inward and extend vertically are formed at intervals in the circumferential direction on the inner peripheral surface of the support ring 21. The vertical ribs 21a are formed over the entire vertical area of ​​the inner peripheral surface of the support ring 21 except for the upper end portion. A receiving plate 21b is formed at the lower end of the support ring 21, protruding radially inward and extending continuously around the entire circumference. The upper surface of the receiving plate 21b abuts against the edge of the lower end opening of the fitting tubular portion 12a. The inner peripheral surface of the receiving plate 21b is located radially outward of the inner peripheral surface of the fitting tubular portion 12a.

[0027] A locking plate 21c is formed at the lower end of the support ring 21, protruding radially outward and extending continuously around the entire circumference. In a vertical cross-sectional view, the locking plate 21c has a curved shape that protrudes diagonally downward and faces radially inward. The end face of the locking plate 21c, located at the outer end in the radial direction and facing radially outward, abuts against the inner circumferential surface of the outer tube portion 12d of the press-down head 12. A support protrusion 12e is formed on the inner peripheral surface of the outer cylindrical portion 12d to support the support ring 21 from below the support ring 21. The support protrusion 12e supports the radial outer end of the locking plate 21c from below the support ring 21. The support protrusion 12e is located below the receiving plate 21b.

[0028] As shown in Figure 2, when fitting the fitting cylindrical portion 12a of the push-down head 12 to the upper end of the stem 11 in the assembled pump 10, the upper surface of the receiving plate 21b is first abutted against the lower end opening edge of the fitting cylindrical portion 12a, and the radial outer end of the locking plate 21c is supported by the support protrusion 12e, and the support ring 21 is then fitted externally onto the fitting cylindrical portion 12a, and the upper end of the stem 11 is then fitted into the fitting cylindrical portion 12a to assemble the dispenser 1.

[0029] The pressing head 12 is made of, for example, polypropylene, and the stem 11 and the support ring 21 are made of, for example, polybutylene terephthalate. In particular, the stem 11, which comes into contact with the liquid content, is preferably made of polybutylene terephthalate, which is resistant to swelling. On the other hand, if the push-down head 12 of the dispenser 1, which is exposed to the outside and is easily seen by the user, is made of polybutylene terephthalate, it is difficult to form it in the desired color tone. It is to be noted that the materials of the stem 11 and the support ring 21 may be changed as appropriate. The support ring 21 may be made of polyolefin resin, metal, elastomer, rubber, or the like.

[0030] Next, a method of using the dispenser 1 configured as described above will be described.

[0031] When the pressing head 12 is pressed down, the stem 11 and the piston guide 14 move downward while compressing the coil spring 17 in the vertical direction, and the upper surface of the top wall of the protruding portion 14a of the piston guide 14 moves downward away from the lower end of the inner cylindrical piston 52 of the piston 13, so that the storage space A of the cylinder 15 and the inside of the stem 11 are connected through the connecting vertical groove 25. At this time, the sliding protrusion 24 of the piston guide 14 moves the lower valve body 18 downward, causing the lower end of the lower valve body 18 to abut against the peripheral edge of the lower end opening on the inner surface of the cylinder 15, blocking communication between the storage space A and the inside of the container body W. In addition, the edge of the lower end opening of the stem 11 abuts against the upper surface of the annular connecting portion 53 of the piston 13, so that when the pressing head 12 continues to be pressed down, the piston 13 also moves downward together with the stem 11 and piston guide 14. This increases the internal pressure of the storage space A, and the content liquid in the storage space A is supplied into the stem 11 through the communicating vertical groove 25 and the gap between the piston guide 14 and the piston 13, causing the upper valve body 19 to move upward away from the upper surface of the valve seat ring 11b, and then discharged from the nozzle hole 12c.

[0032] Thereafter, when the pressing head 12 is released, the stem 11 and piston guide 14 move upward due to the restoration deformation of the coil spring 17, the upper surface of the top wall of the protruding portion 14a of the piston guide 14 comes into contact with the lower end of the inner cylinder piston 52 of the piston 13, the edge of the lower end opening of the stem 11 moves upward away from the annular connecting portion 53 of the piston 13, and the sliding protrusion 24 of the piston guide 14 moves upward the lower valve body 18. As a result, communication between the storage space A of the cylinder 15 and the inside of the stem 11 is blocked, and the lower end of the lower valve body 18 moves upward away from the periphery of the lower end opening on the inner surface of the cylinder 15, connecting the storage space A to the inside of the container body W. In this state, as the stem 11 and piston guide 14 continue to move upward due to the restoring deformation of the coil spring 17, the lower end of the inner cylinder piston 52 of the piston 13 is pushed up against the upper surface of the top wall of the protruding portion 14a of the piston guide 14, and the piston 13 also moves upward, creating a negative pressure in the storage space A and causing the content liquid of the container body W to be supplied to the storage space A from the lower end opening of the cylinder 15.

[0033] As described above, in the dispenser 1 of this embodiment, the support ring 21, which is a separate part from the stem 11 and the push-down head 12, is fitted to the fitting portion between the upper end of the stem 11 and the fitting tubular portion 12a of the push-down head 12, so that it is possible to prevent the support ring 21 from swelling due to the liquid contents. Even if the fitting tubular portion 12a or the stem 11 swells due to the liquid contents, the support ring 21 supports the fitting portion between the upper end of the stem 11 and the fitting tubular portion 12a of the push-down head 12 from the outside in the radial direction, thereby ensuring sealing between the fitting tubular portion 12a and the upper end of the stem 11. Since the push-down head 12 is made of polyolefin resin, the push-down head 12, which is exposed to the outside of the dispenser 1 and is easily visible to the user, can be easily formed in a desired color tone.

[0034] Since multiple vertical ribs 21a are formed at intervals around the circumference on the inner surface of the support ring 21, it is possible to reduce the contact area between the inner surface of the support ring 21 and the mating portion between the upper end of the stem 11 and the mating cylindrical portion 12a of the pressing head 12, and the support ring 21 can be easily fitted onto the aforementioned mating portion with little pushing force.

[0035] A support protrusion 12e that supports the support ring 21 from below is formed on the inner surface of the outer cylindrical portion 12d of the push-down head 12. Therefore, by inserting the support ring 21 inside the outer cylindrical portion 12d and supporting the support ring 21 from below with the support protrusion 12e, the push-down head 12 can be handled and the mating cylindrical portion 12a can be fitted into the upper end of the stem 11, making it possible to assemble the dispenser 1 easily.

[0036] Next, a dispenser 2 according to a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted, with only the differences being described.

[0037] In the dispenser 2 of this embodiment, the locking plate 21c of the support ring 21 and the support protrusion 12e of the outer tube portion 12d of the pressing head 12 are not provided, and a base 22 is provided that is undercut and fitted into the inner tube portion of the upright tube 16a of the mounting cap 16.

[0038] The base 22 has a ring-shaped bottom plate 22a with its front and back surfaces facing up and down, its lower surface resting on the upper surface of the top wall of the attachment cap 16, and a connecting tube 22b extending upward from the inner peripheral edge of the bottom plate 22a. The bottom plate 22a is fixed by an undercut fit within the inner cylindrical portion of the upright tube 16a. The inner diameter of the connecting tube 22b is larger than the outer diameter of the support ring 21. The outer diameter of the connecting tube 22b is smaller than the inner diameter of the outer cylindrical portion 12d of the press-down head 12. When the press-down head 12 is positioned at the lowest position, the upper end of the connecting tube 22b enters the gap between the inner peripheral surface of the outer cylindrical portion 12d and the outer peripheral surface of the support ring 21.

[0039] 4, when fitting the fitting cylindrical portion 12a of the push-down head 12 to the upper end of the stem 11 in the assembled pump 10, a component is prepared in advance, in which the lower end of the outer peripheral surface of the support ring 21 and the upper end of the inner peripheral surface of the connecting tube 22b are connected via a breakable weakened portion 23, and the bottom plate 22a of this component is undercut-fitted into the inner cylindrical portion of the upright tube 16a of the mounting cap 16. At this time, a radial gap is provided between the inner peripheral surface of the support ring 21 and the outer peripheral surface of the stem 11.

[0040] Then, while the fitting cylindrical portion 12a is inserted into the gap between the inner peripheral surface of the support ring 21 and the outer peripheral surface of the stem 11, the upper end of the stem 11 is fitted into the fitting cylindrical portion 12a, and as the support ring 21 descends together with the press-down head 12, the weakened portion 23 is broken, and when the press-down head 12 reaches its lowest position, the lower end opening edge of the fitting cylindrical portion 12a abuts against the upper surface of the receiving plate 21b, and the support ring 21 is fitted onto the fitting cylindrical portion 12a and moves. After that, when the press-down pressure of the press-down head 12 is released, the base 22 remains on the upper surface of the top wall of the attachment cap 16, and the support ring 21 rises together with the press-down head 12 and the stem 11. In this way, the dispenser 2 is assembled.

[0041] As described above, according to the dispenser 2 of this embodiment, similar to the dispenser 1 of the first embodiment, a support ring 21, which is a separate part from the stem 11 and the push-down head 12, is fitted to the fitting portion between the upper end of the stem 11 and the fitting tubular portion 12a of the push-down head 12, so that even if the fitting tubular portion 12a or the stem 11 swells, it is possible to ensure sealing between the fitting tubular portion 12a and the upper end of the stem 11.

[0042] 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.

[0043] For example, the dispenser may be configured such that a lever is used to press down a depression head, causing the content liquid to be dispensed in a mist form from a nozzle hole. In the second embodiment of the dispenser 2, the base 22 may not be provided, and the support ring 21 may be detachably provided on the pump 10, and when the fitting cylindrical portion 12a of the push-down head 12 is fitted onto the upper end of the stem 11, the support ring 21 may be fitted onto the fitting cylindrical portion 12a and moved when the push-down head 12 is positioned at the lower end position.

[0044] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and the above-described variations may be combined as appropriate. [Explanation of symbols]

[0045] 1, 2 Dispenser 10 Pump 11 Stem 12 Depressor head 12a Fitting cylinder part 12c Nozzle hole 12d Outer cylinder 12e Support protrusion 13 Piston 14 Piston guide 15 cylinders 21 Support ring 21a vertical rib W Container Body

Claims

1. a pump having a stem that is biased upward and movable downward at the opening of a container body containing the liquid content; a press-down head having a fitting tubular portion fitted to an upper end of the stem and having a nozzle hole formed therein; a dispenser that, when attached to the mouth portion, presses down the depression head to move the stem downward and operate the pump, thereby discharging the content liquid through the stem and from the nozzle hole, the pressing head is made of a polyolefin resin, A support ring, which is a separate part from the stem and the push-down head, is fitted on the fitting portion between the upper end of the stem and the fitting cylindrical portion.

2. The dispenser according to claim 1, wherein a plurality of vertical ribs are formed on an inner peripheral surface of the support ring at intervals in the circumferential direction, protruding radially inward and extending in the up-down direction.

3. the pressing head includes an outer cylindrical portion that surrounds the support ring from the outside in the radial direction, 3. The dispenser according to claim 1, wherein a support protrusion is formed on an inner peripheral surface of the outer cylindrical portion to support the support ring from below the support ring.

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