Elastic body and discharger

Abstract

To provide a technique which is excellent in recyclability and can contribute to reduction of the number of components.SOLUTION: A synthetic resin-made elastic body 7 arranged in an installation part provided with an opening includes an annular first base part side 7a arranged in the installation part, a second base part side 7a provided at an interval from the first base part side 7b, and an elastic part side 7a that integrally connects the first base part side 7b and the second base part side 7a and is elastically deformable in a direction in which the first base part side 7b and the second base part side 7d approach each other. An inner side of the first base side 7a is provided with a valving element side 7f covering the opening and an elastic piece side 7f integrally connecting the valving element side 7a and the first base side 7g.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an elastic body and a dispenser that includes the elastic body and dispenses a liquid content contained in a container. [Background technology]

[0002] BACKGROUND ART Known as a dispenser for discharging a liquid content contained in a container is one in which a head is pressed down to drive a pump, thereby discharging the liquid content from a nozzle provided on the head (see, for example, Patent Document 1).

[0003] As shown in Patent Document 1, a coil spring is provided inside such a dispenser to return the head, which has been moved toward the cap, to its initial position. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-31950 [Patent Document 2] Japanese Patent Application Laid-Open No. 2024-50382 Summary of the Invention [Problem to be solved by the invention]

[0005] In the dispenser shown in Patent Document 1, most of the components are made of synthetic resin, but the coil spring is made of metal. Therefore, when discarded after use, the dispenser cannot be recycled as a resin product in its current state. Furthermore, in general, in this type of dispenser, the components are firmly fixed to each other, for example, by fitting, to prevent them from coming apart during normal use. Therefore, it takes time and effort to disassemble the dispenser and separate the coil spring from the other components.

[0006] To address these problems, Patent Document 2 discloses a dispenser in which an elastic piece is provided on the cap or head instead of a coil spring. In the dispenser of Patent Document 2, the elastic piece elastically deforms when the head is lowered toward the cap, and the elastically deformed elastic piece returns to its original shape, allowing the head to be raised in the same way as in the conventional dispenser. Furthermore, the dispenser of Patent Document 2 does not require separation of the coil spring when disposed of, and can be reused as a resin product as is, making it highly recyclable.

[0007] In recent years, however, there has been an increasing demand for efforts to reduce the burden on the environment. In light of this, an object of the present invention is to propose a technology that is not only highly recyclable but also contributes to reducing the number of parts in order to reduce the burden on the environment. [Means for solving the problem]

[0008] The present invention provides an elastic body made of synthetic resin that is placed on an installation section having an opening, the elastic body comprising: a first annular base that is placed on the installation section; a second base that is spaced apart from the first base; and an elastic section that connects the first base and the second base together and is elastically deformable in a direction that brings the first base and the second base closer to each other. A valve body that covers the opening and an elastic piece that connects the valve body and the first base together are provided inside the first base. [Effects of the Invention]

[0009] Because the elastic body of the present invention is made of synthetic resin, it can be recycled as a resin product when various synthetic resin products using this elastic body are discarded. Furthermore, this elastic body can utilize the restoring force of the elastically deformed elastic part and can also be used as a check valve for an opening provided in the installation part. In other words, the component used in the past to obtain elastic force and the component used as a check valve can be combined into a single component, contributing to a reduction in the number of parts. [Brief explanation of the drawings]

[0010] [Figure 1]1 is a cross-sectional side view of a first embodiment of a dispenser according to the present invention; [Figure 2A] FIG. 2 is a partially enlarged view of the elastic body shown in FIG. [Figure 2B] 2B is a bottom view of the elastic body shown in FIG. 2A. FIG. [Figure 3] 2 is a diagram illustrating a state in which the operation unit illustrated in FIG. 1 is pressed. FIG. [Figure 4] 10A and 10B are diagrams illustrating a state in which a pressed operating unit is raised. [Figure 5] FIG. 10 is a cross-sectional side view of a dispenser according to a second embodiment of the present invention. [Figure 6A] FIG. 6 is a plan view of the dispenser shown in FIG. 5. [Figure 6B] FIG. 6B is a cross-sectional view taken along line AA shown in FIG. 6A. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of an elastic body and a dispenser according to the present invention will be described with reference to the drawings. In this specification and the like, the up-down direction refers to the direction along the illustrated axis O (the central axis of the cylindrical wall 6a, which will be described later), with the side on which the pipe 2 is located being the "bottom" and the side on which the elastic cover 9A is located being the "top." The radial direction is the direction perpendicular to the axis O in a plane perpendicular to the axis O, and the circumferential direction is the direction rotating around the axis O in this plane. The side from which the nozzle 10d extends (the left side in FIG. 1) will be referred to as the "front" side, and the opposite side (the right side in FIG. 1) will be referred to as the "rear" side.

[0012] 1 is a diagram showing a dispenser 100A which is a first embodiment of the dispenser according to the present invention, and a container 50 to which the dispenser 100A is attached. The dispenser 100A is provided with an elastic body 7 which is one embodiment of the elastic body according to the present invention.

[0013] First, we will explain the container 50. The container 50 of this embodiment is a so-called double container (sometimes called a delaminated container or a delaminate container), and is composed of an inner layer body 51 and an outer layer body 52 provided on the outside of the inner layer body 51.

[0014] The inner layer body 51 is made of a thin synthetic resin and is deformable so as to reduce its volume, and has a storage space S1 inside it that can store the liquid content.

[0015] The outer layer body 52 has a cylindrical mouth portion 52a extending along the axis O. A male thread portion 52b is provided on the outer peripheral surface of the mouth portion 52a. A hollow body portion 52c extending radially outward and then downward is provided below the mouth portion 52a, and a bottom portion (not shown) closes the lower end of the body portion 52c, giving the outer layer body 52 a bottle-like shape. In this embodiment, the outer layer body 52 is made of synthetic resin. The outer layer body 52 has an outside air inlet that penetrates the body portion 52c or the bottom portion (or the mouth portion 52a). Air is taken in through this outside air inlet between the inner layer body 51 and the outer layer body 52, so that when the content liquid from the storage space S1 is discharged to the outside, only the inner layer body 51 can be reduced in volume while maintaining the shape of the outer layer body 52.

[0016] Next, the dispenser 100A will be described. The dispenser 100A of this embodiment is composed of a holder 1, a pipe 2, an attachment cap 4, a packing 5, an upper cylinder 6A, an elastic body 7, an upper support 8A, an elastic cover 9A, and a nozzle head 10. Of the above components, the packing 5, the elastic body 7, and the elastic cover 9A are made of soft elastic materials (e.g., relatively soft synthetic resins such as polyethylene (LDPE, HDPE, and foamed PE), rubber, elastomers, etc.), while the other components are made of hard materials (e.g., hard synthetic resins such as polypropylene (PP), polybutylene terephthalate (PBT), polyacetal (POM), and polyketone (POK) resins, etc.). The upper support 8A and the nozzle head 10 described above are components that correspond to the "operating unit" in this specification.

[0017] The holder 1 includes a cylindrical holder outer peripheral wall 1a located radially inward of the opening 52a when the dispenser 100A is attached to the container 50. A flange 1b extending radially outward is provided at the upper end of the holder outer peripheral wall 1a. A partition wall 1c extending radially inward is provided at the lower end of the holder outer peripheral wall 1a, and an opening 1d is provided at the center of the partition wall 1c. The partition wall 1c separates the storage space S1 from an internal space S2 (described later), and the storage space S1 and the internal space S2 are connected by the opening 1d. The partition wall 1c is a portion where the elastic body 7 is disposed, as described later, and corresponds to the "mounting portion" in this specification. A cylindrical holder inner peripheral wall 1e extending upward radially inward of the holder outer peripheral wall 1a is provided on the upper surface of the partition wall 1c. A cylindrical pipe holder tube 1f extending downward is provided on the lower surface of the partition wall 1c.

[0018] The pipe 2 is hollow, and its upper end is inserted into and fitted into a pipe holding cylinder 1f.

[0019] The attachment cap 4 has a cap top wall 4a that extends horizontally and has a circular through-hole in the center, and a cylindrical cap peripheral wall 4b that extends downward from the outer edge of the cap top wall 4a. An internal thread 4c is provided on the inner peripheral surface of the cap peripheral wall 4b, and the dispenser 100A can be held in the container 50 by threading the internal thread 4c onto the external thread 52b of the container 50.

[0020] The packing 5 is in the shape of an annular plate, and is inserted into and fitted into the holder outer peripheral wall 1a. When the female threaded portion 4c of the attachment cap 4 is screwed onto the male threaded portion 52b of the container 50, the packing 5 is sandwiched between the inner layer 51 covering the upper end of the opening 52a and the cap top wall 4a. This prevents problems such as the content liquid contained in the storage space S1 overflowing to the outside when the container 50 is displaced into an inverted position, for example.

[0021] The upper cylinder 6A has a cylindrical wall 6a. Here, the space located inside the cylindrical wall 6a is referred to as the internal space S2. An annular support wall 6b extending radially outward is provided at the upper end of the cylindrical wall 6a. An outer peripheral wall 6d extending upward is provided at the outer edge of the support wall 6b, and an annular upper support wall 6e extending radially inward is provided at the upper end of the outer peripheral wall 6d, with a gap between it and the support wall 6b.

[0022] The above-mentioned cylindrical wall 6a is fitted and held by the holder outer peripheral wall 1a and the holder inner peripheral wall 1e by being inserted between the holder outer peripheral wall 1a and the holder inner peripheral wall 1e of the holder 1. That is, in this embodiment, the cylindrical wall 6a is indirectly held by the mouth 52a of the container 50 via the holder 1.

[0023] The elastic body 7 includes a first base portion 7a having an annular shape centered on the axis O, a second base portion 7b having an annular shape centered on the axis O and provided at a distance in the up-down direction from the first base portion 7a, and a plurality of inner annular portions 7c (three in this embodiment) having an annular shape centered on the axis O and provided between the first base portion 7a and the second base portion 7b. The first base portion 7a, the second base portion 7b, and the plurality of inner annular portions 7c are provided at equal intervals in the up-down direction.

[0024] The elastic body 7 also includes an elastic portion 7d that is provided between the first base portion 7a, the second base portion 7b, and the multiple inner annular portions 7c and integrally connects them. The elastic portion 7d elastically deforms when a force is applied so that the first base portion 7a and the second base portion 7b move relatively closer together, and when the force is removed, the elastic portion 7d exerts an elastic force so that the first base portion 7a and the second base portion 7b move relatively farther apart. In this embodiment, the elastic portion 7d extends in an arc shape so as to fit within the width of the first base portion 7a, etc., in a plan view, and extends generally obliquely relative to the axis O while curving in a wavy shape in a side view. The elastic portion 7d also has a shape that is point-symmetrical about the point where it intersects with the axis O. Referring to FIG. 2A, the shape of the elastic portion 7d in a side view will be described in more detail. The elastic portion 7d extending from the first base portion 7a to the inner annular portion 7c located directly above it (the elastic portion 7d located at the bottom in FIG. 2A) is curved in a wave-like manner in a side view and extends diagonally generally upward to the right with respect to the axis O. Specifically, the elastic portion 7d has a first curved portion 7d1 that is curved in an arc shape convex upward and extends diagonally upward to the right from the first base portion 7a, a second curved portion 7d2 that is curved in an arc shape convex downward and extends diagonally upward to the right from the first curved portion 7d1, a third curved portion 7d3 that is curved in an arc shape convex upward and extends diagonally upward to the right from the second curved portion 7d2, and a fourth curved portion 7d4 that is curved in an arc shape convex downward and extends diagonally upward to the right from the third curved portion 7d3. 2A, the second elastic portion 7d from the bottom, which is located above the bottom elastic portion 7d, extends in the opposite direction to the bottom elastic portion 7d (extending generally diagonally upward to the left with respect to the axis O while curved in a wavy manner in side view), but is otherwise similar to the bottom elastic portion 7d, and includes a fifth curved portion 7d5, a sixth curved portion 7d6, a seventh curved portion 7d7, and an eighth curved portion 7d8 that have shapes similar to the first curved portion 7d1, the second curved portion 7d2, the third curved portion 7d3, and the fourth curved portion 7d4, respectively.Similarly to the bottommost elastic portion 7d, the second-lowest elastic portion 7d has a shape that is point-symmetrical about point P2, where the axis O intersects with the location where the sixth curved portion 7d6 and the seventh curved portion 7d7 are connected. Furthermore, in the elastic body 7 of this embodiment, the third-lowest elastic portion 7d has the same shape as the bottommost elastic portion 7d, and the topmost elastic portion 7d has the same shape as the second-lowest elastic portion 7d. Thus, the elastic body 7 of this embodiment is configured such that the elastic portions 7d are alternately arranged with opposite tilt directions, such as an elastic portion 7d extending diagonally upward to the right followed by an elastic portion 7d extending diagonally upward to the left. While the bottommost elastic portion 7d in this embodiment extends diagonally upward to the right, the bottommost elastic portion 7d may also extend diagonally upward to the left.

[0025] The shape of the elastic piece 7g is not limited to that shown in the figure. Examples of modified elastic pieces 7g include those with a different number of arcuate curved portions forming a wave shape, those with a linear connection between the second curved portion 7d2 and the third curved portion 7d3 and between the sixth curved portion 7d6 and the seventh curved portion 7d7, and those with curved portions only at the portions connecting the first base portion 7a, the second base portion 7b, and the inner annular portion 7c, with the intermediate portion connecting the two curved portions extending linearly. While the elastic body 7 of this embodiment includes three inner annular portions 7c in the illustrated example, the number can be changed as appropriate, and may be two or less, four or more, or may not include any inner annular portions 7c.

[0026] 2A and 2B, a disk-shaped valve element 7f and an elastic piece 7g are provided inside a through hole located in the center of the first base portion 7a. One end of the elastic piece 7g is integrally connected to the valve element 7f and the other end is integrally connected to the first base portion 7a. The cross-hatching in FIG. 2B indicates the through hole located around the elastic piece 7g, and the location of the elastic piece 7g is the white area excluding the cross-hatching in FIG. 2B. The elastic piece 7g of this embodiment extends radially outward from the valve element 7f, then extends in an arc, and then extends toward the first base portion 7a. The elastic body 7 of this embodiment has a total of three elastic pieces 7g of this shape around the valve element 7f.

[0027] As shown in the figure, the elastic body 7 is attached so that the first base portion 7a is positioned on the upper surface of the partition wall 1c radially inside the holder inner peripheral wall 1e. In this state, the valve body 7f is seated on the upper surface of the partition wall 1c, covering the opening 1d. When the pressure in the internal space S2 becomes relatively lower than the pressure in the accommodation space S1, the elastic piece 7g of the valve body 7f elastically deforms and moves away from the upper surface of the partition wall 1c, thereby opening the opening 1d. In other words, the first base portion 7a functions as a check valve.

[0028] In this embodiment, the upper support body 8A includes a support portion 8a having a cross-sectional shape curved in an arcuate shape, forming an overall dome shape, as shown in the figure. An upper peripheral wall 8b extending downward is provided on the underside of the support portion 8a, and a step portion 8c extending horizontally is provided on the radially inner side of the upper peripheral wall 8b. The second base portion 7b is inserted inside the upper peripheral wall 8b and is supported by the support portion 8a while in contact with the step portion 8c.

[0029] A cylindrical inner tube portion 8d extending upward is provided in the center of the support portion 8a. The passage provided inside the inner tube portion 8d is referred to as an inner passage S3. A communication port 8e is provided at the base of the inner tube portion 8d, penetrating the inner tube portion 8d and communicating with the inner passage S3.

[0030] The elastic cover 9A is elastically deformable and has an upper wall 9a that extends in an arc shape in cross section and covers the upper part of the upper support 8A. The outer edge of the upper wall 9a is provided with a cover holding portion 9b that is held in a gap that is defined by the support wall 6b, the support wall outer edge wall 6d, and the support wall upper side wall 6e and has a U-shaped cross section.

[0031] The upper wall 9a of this embodiment has a through-hole 9c located in the center of the upper wall 9a and penetrating the upper wall 9a in the vertical direction, and an outer cylindrical portion 9d surrounding the through-hole 9c and standing upright from the upper wall 9a. The inner cylindrical portion 8d is inserted inside the through-hole 9c and the outer cylindrical portion 9d.

[0032] A convex first seal portion 9e that protrudes downward is provided on the underside of the upper wall 9a (see the partially enlarged view in FIG. 1). In the state shown in FIG. 1 (when the nozzle head 10 is moved to its upper limit by the elastic body 7), the first seal portion 9e is in liquid-tight contact with the upper surface of the support portion 8a. A convex second seal portion 9f that protrudes radially inward is provided on the inner circumferential surface of the outer cylindrical portion 9d (see the partially enlarged view in FIG. 1). The second seal portion 9f is in slidable and liquid-tight contact with the outer circumferential surface of the inner cylindrical portion 8d. Note that in the partially enlarged view in FIG. 1, the first seal portion 9e and the second seal portion 9f are shown overlapping with their respective contacting counterparts, but in reality, the first seal portion 9e and the second seal portion 9f are elastically deformed so as to be crushed.

[0033] The nozzle head 10 includes a cylindrical connecting tube portion 10a into which the inner tube portion 8d is inserted and held by the inner tube portion 8d. In the state shown in FIG. 1, the lower end of the connecting tube portion 10a is located above the upper end of the outer tube portion 9d. The outer diameter of the connecting tube portion 10a is larger than the inner diameter of the outer tube portion 9d. As shown in FIG. 3, when the nozzle head 10 is pushed down, the lower end of the connecting tube portion 10a contacts the upper end of the outer tube portion 9d, allowing the connecting tube portion 10a to push down the outer tube portion 9d. A top wall portion 10b is provided above the connecting tube portion 10a, and serves as a surface against which a finger is pressed when the nozzle head 10 is pushed down. A head outer periphery portion 10c is provided at the outer edge of the top wall portion 10b, extending downward and surrounding the connecting tube portion 10a. A cylindrical nozzle 10d is provided in front of the head outer periphery portion 10c, extending radially outward. A passage provided inside the nozzle 10d communicates with the aforementioned inner passage S3.

[0034] Next, the procedure for discharging the liquid content from the dispenser 100A will be described. First, the nozzle head 10 is pressed downward against the dispenser 100A attached to the container 50. This causes the upper support 8A to move downward together with the nozzle head 10, so that the first seal portion 9e (see the enlarged partial view in FIG. 1 ) separates from the upper surface of the support portion 8a and the communication port 8e communicates with the internal space S2. The downward movement of the upper support 8A also presses down the second base portion 7b, elastically compressing and deforming the elastic portion 7d. After the lower end of the connecting tube portion 10a contacts the upper end of the outer tube portion 9d, the upper wall 9a is elastically deformed downward by the outer tube portion 9d, which moves downward together with the nozzle head 10, thereby reducing the volume of the internal space S2. At this time, the opening 1d connecting the storage space S1 and the internal space S2 is closed by the valve body 7f, so that the internal space S2, whose volume decreases when the nozzle head 10 is pressed down, is pressurized. Therefore, the pressurized air in the internal space S2 (or the pressurized liquid if the liquid is already contained in the internal space S2) passes from the internal space S2 through the communication port 8e, passes through the inner passage S3, and is discharged from the nozzle 10d.

[0035] When the pressure on the nozzle head 10 is released, the elastically deformed elastic portion 7d returns to its original state, moving the upper support 8A upward, as shown in FIG. 4. This causes the first seal portion 9e (see the enlarged partial view in FIG. 1) to contact the upper surface of the support portion 8a, and the internal space S2 becomes disconnected from the inner passage S3. Furthermore, the upward movement of the support portion 8a causes the upper wall 9a, which had been elastically deformed downward, to gradually return to its original state. This increases the volume of the internal space S2, creating a reduced-pressure atmosphere in the internal space S2. At this time, the pressure in the storage space S1 becomes relatively higher than that in the internal space S2. Therefore, the valve element 7f, which had been closing the opening 1d, elastically deforms the elastic piece 7g and moves away from the upper surface of the partition wall 1c, opening the opening 1d. The liquid contained in the storage space S1 then flows through the pipe 2 and the opening 1d into the internal space S2.

[0036] When the nozzle head 10 is pressed again, the elastic portion 7d is elastically deformed so as to be compressed, and the liquid content in the internal space S2 is pressurized. The pressurized liquid content passes from the internal space S2 through the communication port 8e, passes through the inner passage S3, and is ejected from the nozzle 10d to the outside world.

[0037] Thereafter, when the ejection of the content liquid is completed and the pressing force on the nozzle head 10 is released, the elastically deformed elastic portion 7d returns to its original shape, and new content liquid is introduced into the internal space S2. Therefore, by repeatedly pressing and releasing the nozzle head 10, the content liquid contained in the storage space S1 can be ejected to the outside.

[0038] Next, a dispenser 100B, which is a second embodiment of a dispenser according to the present invention, will be described with reference to Figures 5, 6A, and 6B. In the following description, the differences in function from the dispenser 100A described above will be mainly described, and parts that share the same function will be denoted by the same reference numerals in the drawings and detailed description will be omitted.

[0039] The dispenser 100B is provided with an upper cylinder 6B, an upper support 8B and an elastic cover 9B instead of the upper cylinder 6A, upper support 8A and elastic cover 9A described above, and the nozzle head 10 is eliminated.

[0040] The upper cylinder 6B has a cylindrical wall 6a, and an internal space S2 is defined inside the cylindrical wall 6a. In this embodiment, a support wall 6b extending radially outward and having an arc-shaped configuration in plan view is provided at the upper end of the cylindrical wall 6a from the rear to the front, as shown in FIGS. 5 and 6A. A base wall 6c extending radially outward and having a rectangular shape in plan view is provided at the front. A support wall outer edge wall 6d extending upward is provided at the outer edge of the support wall 6b. A support wall upper side wall 6e extending radially inward and spaced apart from the support wall 6b is provided at the upper end of the support wall outer edge wall 6d. A base wall outer edge wall 6f extending upward is provided at the outer edge (the widthwise end of the base wall 6c) of the base wall 6c, as shown in FIG. 6B. A side wall 6g extending radially inward and spaced apart from the base wall 6c is provided at the upper end of the base wall outer edge wall 6f. In this embodiment, the base wall outer edge walls 6f and the side walls 6g are provided on both sides of the base wall 6c in the width direction, and the upper cylinder 6B has a pair of base wall outer edge walls 6f and a pair of side walls 6g.

[0041] The upper support body 8B is provided with the above-mentioned support portion 8a, upper peripheral wall 8b, and step portion 8c, while the inner cylindrical portion 8d and communication port 8e are omitted.

[0042] The elastic cover 9B is elastically deformable and includes a dome-shaped upper wall 9g that covers the upper support 8A. The central portion of the upper wall 9g is the portion that is operated to eject the liquid contents, as described below. This portion corresponds to the "operation portion" in this specification. The outer edge of the upper wall 9g is provided with a cover holding portion 9h that is held in a gap that is U-shaped in cross section and is defined by the support wall 6b, the support wall outer edge wall 6d, and the support wall upper side wall 6e, as shown in Figures 5 and 6A. In this way, the outer edge of the upper wall 9g is held by the cover holding portion 9h, thereby closing off the upper portion of the internal space S2 and sealing the internal space S2 from the outside.

[0043] An elastic wall 9j is provided at the front side of the outer edge of the upper wall 9g, extending downward and then radially outward to overlap the base wall 6c. As shown in FIG. 6B , the widthwise outer end 9k of the elastic wall 9j is held by a gap defined by the base wall 6c, the base wall outer edge wall 6f, and the side wall 6g, forming a U-shaped cross-sectional view. The widthwise central portion 9m of the elastic wall 9j is elastically deformable away from the base wall 6c and is normally in contact with the upper surface of the base wall 6c. When the liquid contained in the internal space S2 is pressurized, as described below, the elastically deforms, forming a gap between the base wall 6c and the widthwise central portion 9m that allows the liquid to be ejected to the outside. In this embodiment, the base wall 6c and the elastic wall 9j constitute a "nozzle" as described herein.

[0044] In this embodiment, the upper cylinder 6B and the elastic cover 9B are formed by integrating the material forming the upper cylinder 6B and the material forming the elastic cover 9B in a mold using a technique such as insert molding. After molding, the base wall 6c and the widthwise central portion 9m of the elastic wall 9j are pseudo-adhered and can be peeled off when force is applied.

[0045] In the dispenser 100B configured as described above, when the upper wall 9g is pressed downward, the upper support 8B moves downward together with the upper wall 9g, pushing down the second base portion 7b, and elastically deforming to compress the elastic portion 7d. Furthermore, because the opening 1d connecting the storage space S1 and the internal space S2 is closed by the valve body 7f, the internal space S2, whose volume decreases when the upper wall 9g is pressed down, is pressurized. Therefore, the pressurized air in the internal space S2 (or the pressurized liquid if the internal space S2 already contains liquid) applies a force to the widthwise center 9m of the elastic wall 9j to move it away from the base wall 6c, thereby separating the base wall 6c and the widthwise center 9m even when they are pseudo-bonded.

[0046] When the pressing force on the upper wall 9g is released, the elastically deformed elastic portion 7d returns to its original state and moves the upper wall 9g upward together with the upper support body 8B, increasing the volume of the internal space S2 and creating a reduced-pressure atmosphere in the internal space S2. At this time, the pressure in the storage space S1 becomes relatively higher than that in the internal space S2, so the valve body 7f that had been closing the opening 1d elastically deforms the elastic piece 7g and moves away from the upper surface of the partition wall 1c, opening the opening 1d, and the liquid contained in the storage space S1 passes through the pipe 2 and the opening 1d and is introduced into the internal space S2.

[0047] When the upper wall 9g is pressed again, the elastic portion 7d is elastically deformed so as to be compressed, and the liquid contents in the internal space S2 are pressurized. The pressurized liquid contents elastically deform the widthwise central portion 9m of the elastic wall 9j, causing the liquid contents to pass through the gap between the base wall 6c and the widthwise central portion 9m and be ejected to the outside world from the tip of the base wall 6c.

[0048] When the widthwise central portion 9m of the elastic wall 9j elastically deforms, an upward force also acts on the widthwise end portion 9k of the elastic wall 9j. However, in this embodiment, the widthwise end portion 9k is sandwiched between the widthwise end portion of the base wall 6c and the side wall 6g, thereby preventing the widthwise end portion 9k from peeling off from the base wall 6c.

[0049] Subsequently, when the liquid content has been discharged and the pressure on the upper wall 9g is released, the elastically deformed widthwise center portion 9m returns to its original shape and contacts the base wall 6c. This prevents the liquid content from remaining between the base wall 6c and the widthwise center portion 9m, preventing the liquid content from dripping after it has been discharged. Furthermore, when the pressure on the upper wall 9g is released, the elastically deformed elastic portion 7d returns to its original shape, allowing new liquid content to be introduced into the internal space S2. Therefore, by repeatedly releasing the pressure on the upper wall 9g, the liquid content contained in the storage space S1 can be discharged to the outside.

[0050] While one embodiment of the present invention has been described above with reference to the drawings, this embodiment may be modified as follows. For example, the elastic body 7 described above is not limited to use in dispensers such as dispensers 100A and 100B, but may also be used in products in which the elastic portion has a restoring force and functions as a check valve. Furthermore, while the cylindrical wall 6a described above is indirectly held by the opening 52a of the container 50 via the holder 1, the holder 1 may be omitted and the cylindrical wall 6a may be directly held by the opening 52a. In this embodiment, the elastic pieces 7g are arc-shaped as shown in FIG. 2B, and a total of three elastic pieces 7g are provided. However, the shape and number of the elastic pieces 7g may be modified as appropriate. For example, the number of elastic pieces 7g may be two or less, four or more.

[0051] In the above-described embodiment, the first seal portion 9e is provided on the upper wall 9a and is configured to contact the support portion 8a, but it may also be configured to be provided on the support portion 8a and contact the upper wall 9a. Furthermore, in the above-described embodiment, the second seal portion 9f is provided on the outer cylindrical portion 9d and is configured to contact the inner cylindrical portion 8d, but it may also be configured to be provided on the inner cylindrical portion 8d and contact the outer cylindrical portion 9d.

[0052] Furthermore, the containers to which the dispensers 100A and 100B are attached are not limited to so-called double containers, but may also be pouch containers. The orientation in which the dispensers 100A and 100B are used is not limited to the orientation shown in the drawings, and they may also be used in an orientation in which the nozzle head 10 and the elastic cover 9B face downward or to the side.

[0053] (Addendum) This specification discloses the following technology in one aspect. Note that the reference numerals described below correspond to the reference numerals in the accompanying drawings, but are presented as examples and are not intended to limit the invention of this application.

[0054] (Technology 1) An elastic body (7) made of synthetic resin that is placed in an installation part having an opening, the annular first base portion (7a) is placed on the installation portion; a second base portion (7b) is provided at a distance from the first base portion (7a); and an elastic portion (7d) that integrally connects the first base portion (7a) and the second base portion (7b) and is elastically deformable in a direction in which the first base portion (7a) and the second base portion (7b) approach each other; An elastic body (7) provided on the inside of the first base portion (7a) with a valve body (7f) that covers the opening and an elastic piece (7g) that integrally connects the valve body (7f) and the first base portion (7a).

[0055] This technology allows the elastic part to have both the restoring force and the function of a check valve to be obtained in a single component, which contributes to reducing the number of parts in products that use this elastic body.

[0056] (Technology 2) A dispenser (100A) that is attached to a mouth (52a) of a container (50) that contains a liquid content, and that dispenses the liquid content from a nozzle (10d) when an operating part is operated, a cylindrical wall (6a) held directly or indirectly against the mouth portion (52a) and having an internal space (S2) formed therein; The elastic body (7) according to the first technique is disposed inside the cylindrical wall (6a); a partition wall (1c) that separates the inside of the container (50) from the internal space (S2) and functions as the installation section; an upper wall (9a) that is elastically deformable and whose outer edge is held by the upper end of the cylindrical wall (6a); When the operating part is operated, the elastic part (7d) is elastically deformed and the upper wall (9a) is elastically deformed downward, pressurizing the internal space (S2) and discharging the content liquid from the nozzle (10d).

[0057] This technology allows the component used to obtain elasticity and the component used as a check valve to be combined into one component, thereby reducing the number of parts.In addition, because it does not use the coil spring used in previous dispensers, there is no need to separate the coil spring when disposing of it, making it highly recyclable.

[0058] (Technology 3) The upper wall (9a) has a through-hole (9c) penetrating the upper wall (9a) and an outer cylindrical portion (9d) surrounding the through-hole (9c) and standing upright from the upper wall (9a), the operating portion includes the nozzle (10d), a support portion (8a) that supports the second base portion (7b) inside the upper wall (9a), a cylindrical inner cylinder portion (8d) that extends upward from the support portion (8a) and is inserted into the outer cylinder portion (9d), and an inner passage (S3) that communicates with the nozzle (10d), and a communication port (8e) that penetrates the inner cylinder portion (8d) and communicates with the inner passage (S3), one of the upper wall (9a) and the support portion (8a) has a first seal portion (9e) that normally comes into liquid-tight contact with the other of the upper wall (9a) and the support portion (8a); one of the outer cylindrical portion (9d) and the inner cylindrical portion (8d) has a second seal portion (9f) above the communication port (8e) that is slidable relative to the other of the outer cylindrical portion (9d) and the inner cylindrical portion (8d) and is in liquid-tight contact with the other of the outer cylindrical portion (9d) and the inner cylindrical portion (8d); In the discharger (100A) according to Technology 2, when the operating part is operated, the inner cylinder part (8d) moves downward relative to the outer cylinder part (9d), and the internal space (S2) and the inner passage (S3) communicate with each other through the communication port (8e).

[0059] This technology makes the configuration of the dispenser, in which the nozzle is provided in the operating part and moves together with the operating part when discharging the liquid content, more suitable for mass production, making it easier to realize the present invention.

[0060] (Technology 4) The upper wall (9g) has a shape that covers the upper part of the cylindrical wall (6a) and has the operating part at the center thereof, The dispenser (100B) according to technique 2, wherein the nozzle extends outward from the cylindrical wall (6a).

[0061] This technology makes it possible to provide a dispenser having a nozzle on the cylindrical wall, in which the nozzle does not move when discharging the liquid content, but only the operating part moves, making it more suitable for mass production and making it easier to realize the present invention.

[0062] (Technology 5) The nozzle has a base wall (6c) and an elastic wall (9j) superimposed on the base wall (6c), The base wall (6c) extends outward from the cylindrical wall (6a), The elastic wall (9j) has a pair of widthwise end portions (9k) located on the outer sides of the nozzle in the width direction, which are fixed to the base wall (6c), and a widthwise central portion (9m) located on the inner side of the nozzle (10d) in the width direction, which is elastically deformable in a direction away from the base wall (6c), The dispenser (100B) according to Technology 4, wherein the elastic wall (9j) and the upper wall (9g) are integrally connected.

[0063] This technology allows the elastic wall and the upper wall to be constructed from a single member, which simplifies the structure and reduces the number of parts, thereby advantageously reducing costs.

[0064] Although one embodiment of the present invention has been described above, the present invention is not limited to this specific embodiment, and unless otherwise limited in the above description, various modifications and variations are possible within the spirit and scope of the present invention as defined in the claims. For example, the configurations of the above-described embodiment may be added or deleted as appropriate, and the configurations of one embodiment may be incorporated into other embodiments. Furthermore, the effects of the above-described embodiment are merely examples of the effects that can be obtained from the present invention. In other words, the effects of the present invention are not limited to the above-described effects, and additional effects may be obtained in addition to the above-described effects. [Explanation of symbols]

[0065] 1: Holder 1a: holder outer wall 1b: flange 1c: Partition wall (installation area) 1d:Aperture 1e: Inner wall of holder 1f: Pipe holding tube 2: Pipe 4: Mounting cap 4a: Cap top wall 4b: Cap peripheral wall 4c: Female thread 5: Packing 6A, 6B: Upper cylinder 6a: Cylindrical wall 6b: Support wall 6c: Base wall (nozzle) 6d: Support wall outer edge wall 6e: Support wall upper wall 6f: Base wall outer edge wall 6g: Side wall 7: Elastic body 7a: First base 7b:Second base 7c: Inner annular part 7d: Elastic part 7d1: First curved part 7d2: Second curved part 7d3: Third curved part 7d4: Fourth curved part 7d5: Fifth curved part 7d6: Sixth curved part 7d7: Seventh curved part 7d8: Eighth curved part 7f: Valve body 7g: Elastic piece 8A, 8B: Upper support 8a: Support part 8b: Upper peripheral wall 8c:Dan section 8d: Inner cylinder part 8e: Communication port 9A, 9B: Elastic cover 9a: Upper wall 9b: Cover holding part 9c: Penetration part 9d: Outer cylinder 9e: First seal part 9f: Second seal part 9g: Upper wall (operation part) 9h: Cover holder 9j: Elastic wall (nozzle) 9k: Width end 9m: Width center part 10: Nozzle head 10a: Connecting cylinder part 10b: Ceiling wall part 10c: Head outer periphery 10d: Nozzle 50: Container 51: Inner layer 52: Outer body 52a: Mouth 52b: Male thread 52c: Torso 100A, 100B: Discharge device O: Axis line S1: Containment Space S2: Internal space S3: Inner passage

Claims

1. An elastic body made of synthetic resin that is placed in an installation part having an opening, a first annular base portion disposed on the installation portion, a second base portion disposed at a distance from the first base portion, and an elastic portion that integrally connects the first base portion and the second base portion and is elastically deformable in a direction in which the first base portion and the second base portion approach each other; An elastic body is provided on the inside of the first base portion, the elastic body including a valve body that covers the opening and an elastic piece that integrally connects the valve body and the first base portion.

2. A dispenser that is attached to the mouth of a container that contains a liquid content, and that dispenses the liquid content from a nozzle when an operating part is operated, A cylindrical wall that is directly or indirectly held against the mouth portion and has an internal space provided therein; The elastic body according to claim 1 , which is disposed inside the cylindrical wall; a partition wall that separates the inside of the container from the internal space and functions as the installation section; an upper wall that is elastically deformable and has an outer edge portion that is held by the upper end portion of the cylindrical wall; When the operating portion is operated, the elastic portion is elastically deformed, and the upper wall is elastically deformed downward, pressurizing the internal space and discharging the content liquid from the nozzle.

3. the upper wall includes a through-hole that penetrates the upper wall and an outer tubular portion that surrounds the through-hole and stands up from the upper wall, the operating portion includes the nozzle, a support portion that supports the second base portion inside the upper wall, a cylindrical inner cylindrical portion that extends upward from the support portion and is inserted into the outer cylindrical portion, an inner passage that communicates with the nozzle, and a communication port that penetrates the inner cylindrical portion and communicates with the inner passage, one of the upper wall and the support portion has a first seal portion that normally comes into liquid-tight contact with the other of the upper wall and the support portion; one of the outer cylindrical portion and the inner cylindrical portion has a second seal portion above the communication port that is slidable relative to the other of the outer cylindrical portion and the inner cylindrical portion and that is in liquid-tight contact with the other of the outer cylindrical portion and the inner cylindrical portion; The dispenser according to claim 2, wherein when the operating portion is operated, the inner cylinder portion moves downward relative to the outer cylinder portion, and the internal space and the inner passage communicate with each other through the communication port.

4. the upper wall has a shape that covers the upper part of the cylindrical wall and includes the operation unit at a central portion, The dispenser of claim 2 , wherein the nozzle extends outwardly from the cylindrical wall.

5. The nozzle has a base wall and an elastic wall superimposed on the base wall, The base wall extends outward from the cylindrical wall, a pair of widthwise end portions of the elastic wall located on outer sides of the nozzle in the width direction are fixed to the base wall, and a widthwise central portion of the elastic wall located on the inner side of the nozzle in the width direction is elastically deformable in a direction away from the base wall, The dispenser of claim 4, wherein the resilient wall and the top wall are integrally connected.

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