Coating container

Abstract

To provide a coating container where a specified amount of contents is stored in a storage chamber when the pressing of an application part against a coated part is released.SOLUTION: The coating container includes a container body W comprising an inner container W2 and an outer container W3, a plug member 11, a check valve 12, a discharge member 13, and an application cap 14. The application cap includes an elastic cylindrical part 35 covering a communication hole 21 from above and defining a storage chamber X with the plug member, and an application portion 36 provided on a top wall 38 of the elastic cylindrical part and protruding upward from the discharge member through the discharge hole 28. A slit 41 is formed in the top wall of the elastic cylindrical part to block communication between the storage chamber and the discharge hole and to open when the elastic cylindrical part is compression-deformed downward. At least an upper portion continuous with the top wall of the elastic cylindrical part in a peripheral wall 39 of the elastic cylindrical part, is formed elastically deformably, and a portion where the slit is formed in the top wall of the elastic cylindrical part is thicker than the upper portion of the peripheral wall of the elastic cylindrical part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an application container. [Background technology]

[0002] Conventionally, there has been known an applicator container comprising an inner container that accommodates contents and undergoes volume reduction as the contents decrease, a container body having an outer container in which the inner container is housed and which has an air intake hole between the inner container and the outer container, an inner stopper member that is attached to the mouth of the container body and has a communication hole that communicates with the inside of the inner container, a check valve that fits tightly and can be separated upward against the opening periphery of the communication hole in the inner stopper member, a discharge member that covers the communication hole from above and has a discharge hole for the contents, and an applicator stopper that is provided between the inner stopper member and the discharge member. For example, in the application container described in Patent Document 1 below, the application stopper is formed in a cylindrical shape with a top and includes an elastic cylindrical portion that covers the communication hole from above and defines a storage chamber between it and the inner stopper member, and an application portion that is provided on the top wall of the elastic cylindrical portion and protrudes upward from the discharge member through the discharge hole, and the top wall of the elastic cylindrical portion is formed with a slit that blocks communication between the storage chamber and the discharge hole and expands when the elastic cylindrical portion is compressed and deformed downward to communicate between the storage chamber and the discharge hole. In this applicator container, when the applicator part of the applicator stopper is pressed against the part to be applied, the applicator part is pushed into the storage chamber through the discharge hole, compressing and deforming the elastic cylindrical part in the vertical direction, widening the slit, and connecting the storage chamber and the discharge hole. At this time, the storage chamber is pressurized due to the compressive deformation of the elastic cylindrical part. If the contents are stored in the storage chamber, the contents are discharged through the slit and the discharge hole into the part to be applied, and the check valve maintains the communication hole in a closed state. Therefore, with the communication between the inner container and the storage chamber through the communication hole blocked, only the specified amount of contents stored in the storage chamber can be applied to the part to be applied. As described above, by pressing the application part against the part to be applied, it is possible to eject and apply the amount of contents stored in the storage chamber without having to squeeze and deform the outer container, and even small amounts of contents can be applied stably. When the pressure of the applicator part against the part to be applied is released, the elastic cylindrical part deforms to restore its original shape, closing the slit and blocking communication between the reservoir chamber and the discharge hole. At this time, the reservoir chamber becomes under negative pressure, the check valve moves upward away from the communication hole, and the inner container and the reservoir chamber communicate through the communication hole. The contents in the inner container flow into the reservoir chamber through the communication hole and are stored there. On the other hand, when the inner container undergoes volume reduction and deformation due to a decrease in the contents, negative pressure is created between the inner and outer containers, and outside air is drawn into the gap between the inner and outer containers through the intake holes in the outer container. This keeps the inner container in a volume reduction and deformation state, preventing outside air from entering the inner container, preventing oxidation of the contents inside the inner container, and maintaining the quality of the contents. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-144263 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional applicator containers, when the application part is released from pressing against the part to be applied, the elastic cylindrical part begins to restore its original shape before the slit closes, and outside air flows into the storage chamber through the slit, preventing the internal pressure of the storage chamber from decreasing, which means that the check valve does not open and there is a risk that less content than the specified amount will be stored in the storage chamber.

[0005] The present invention provides an applicator container that can store a specified amount of content in a storage chamber when the application part is released from pressing against a part to be applied. [Means for solving the problem]

[0006] An applicator container according to one aspect of the present invention comprises an inner container that accommodates contents and undergoes volume reduction deformation as the contents decrease, and a container body including an outer container in which the inner container is housed and an air intake hole for drawing in outside air between the inner container and the outer container; an inner plug member that is attached to the mouth of the container body and has a communication hole that communicates with the inside of the inner container; a check valve that is removably fitted upward against the opening periphery of the communication hole in the inner plug member; a discharge member that covers the communication hole from above and has a discharge hole for the contents; and an applicator stopper that is provided between the inner plug member and the discharge member, wherein the applicator stopper is formed in a cylindrical shape with a top and The device comprises an elastic cylindrical portion that covers the communication hole from above and defines a storage chamber between itself and the inner stopper member, and an application portion that is provided on the top wall of the elastic cylindrical portion and protrudes upward from the discharge member through the discharge hole, and a slit is formed in the top wall of the elastic cylindrical portion that blocks communication between the storage chamber and the discharge hole and expands when the elastic cylindrical portion is compressed and deformed downward to communicate between the storage chamber and the discharge hole, at least the upper part of the peripheral wall of the elastic cylindrical portion that is continuous with the top wall of the elastic cylindrical portion is formed to be elastically deformable, and the portion of the top wall of the elastic cylindrical portion where the slit is formed is formed thicker than the upper part of the peripheral wall of the elastic cylindrical portion.

[0007] The portion of the top wall of the elastic cylindrical portion where the slit is formed is thicker than the upper portion of the peripheral wall of the elastic cylindrical portion, which is continuous with the top wall of the elastic cylindrical portion and is formed to be elastically deformable.Therefore, when the applicator portion is pressed against the part to be applied and the elastic cylindrical portion is elastically deformed, it is possible to prevent the slit from widening too much, and when the pressure of the applicator portion against the part to be applied is released, the slit can be closed instantly. This makes it possible to prevent the elastic cylindrical portion from beginning to restore its original shape before the slit closes after the application portion is released from pressing against the application portion, allowing the specified amount of contents to be stored in the storage chamber.

[0008] The slits may be provided in the top wall of the elastic cylindrical portion in a number of two to four, spaced equally apart in the circumferential direction, so as to surround the applicator portion from the outside in the radial direction.

[0009] Two to four slits are provided at equal intervals around the circumference on the top wall of the elastic cylindrical portion so as to surround the application portion from the radial outside, which makes it possible to reduce the timing discrepancy between the opening and closing of each slit, and ensures that the specified amount of contents is stored in the storage chamber after the application portion is released from pressing against the application portion.

[0010] The storage chamber may be formed in a flat shape whose vertical size is equal to or smaller than the size in a radial direction intersecting the container axis when viewed from the vertical direction.

[0011] Since the storage chamber is formed in a flat shape whose vertical size is equal to or smaller than its radial size, when the applicator part is pressed against the part to be applied, the internal volume of the storage chamber can be significantly reduced without significantly compressing and deforming the elastic cylindrical part in the vertical direction, and when the elastic cylindrical part returns to its original shape, a large amount of the contents in the inner container can flow into the storage chamber. This reduces the number of times the applicator part is pressed against the part to be applied and the number of times it is released.

[0012] A regulating protrusion protruding upward may be provided on the peripheral edge of the opening of the discharge hole in the discharge member, and the amount by which the application portion protrudes upward from the regulating protrusion may be smaller than the vertical distance between the top wall of the elastic cylindrical portion and the check valve.

[0013] A restricting protrusion that protrudes upward is provided on the periphery of the opening of the discharge hole in the discharge member, so that when the applicator part is pressed against the part to be applied, the restricting protrusion abuts against the part to be applied, preventing the applicator part from being pushed further into the storage chamber. At this time, the amount by which the applicator part protrudes upward from the restricting protrusion is smaller than the vertical distance between the top wall of the elastic cylindrical part and the check valve, so that when the applicator part is pressed against the part to be applied, the top wall of the elastic cylindrical part does not press the check valve downward, and it is possible to prevent the check valve from becoming difficult to move upward away from the communicating hole when negative pressure is created in the storage chamber. [Effects of the Invention]

[0014] According to the above aspect of the present invention, when the pressing of the application part against the application target part is released, a specified amount of the contents can be stored in the storage chamber. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a vertical cross-sectional view showing a part of an application container according to one embodiment. [Figure 2] FIG. 2 is a top view of the applicator plug shown in FIG. [Figure 3] 2 is a diagram showing a state in which the applicator container shown in FIG. 1 is inverted and the applicator part is pressed against a part to be applied. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of an application container according to the present invention will be described with reference to the drawings. 1, the application container 1 of this embodiment includes a container body W, an inner plug member 11, a check valve 12, a discharge member 13, an application plug 14, an application member 15, a fixing ring 16, and a cap 17. The application member 15, the fixing ring 16, and the cap 17 do not necessarily have to be provided.

[0017] The container body W is formed in a cylindrical shape with a bottom. Hereinafter, the central axis of the container body W will be referred to as the container axis O, the side of the mouth W1 of the container body W in the direction along the container axis O will be referred to as the upper side, the bottom side of the container body W in the direction along the container axis O will be referred to as the lower side, and the direction along the container axis O will be referred to as the up-down direction. When viewed from the up-down direction, the direction intersecting the container axis O will be referred to as the radial direction, and the direction going around the container axis O will be referred to as the circumferential direction.

[0018] (Container body and cap) The container body W includes an inner container W2 that accommodates contents and undergoes volume-reducing deformation (shrinkage deformation) as the contents decrease, and an outer container W3 that houses the inner container W2. The container body W is a delaminating container (delamination bottle) in which the inner container W2 is peelably laminated on the inner surface of the outer container W3. The outer container W3 is formed to have a constant rigidity throughout, and the body of the outer container W3 is resistant to deformation even when pressed radially inward. The outer container W3 is provided with an air intake hole (not shown) that introduces outside air between it and the inner container W2. The air intake hole is provided, for example, in the bottom or opening of the outer container W3. For example, a slit in the outer container W3 at a pinch-off portion provided at the bottom of the container body W may be used as the air intake hole. A cylindrical cap 17 with a top is detachably screwed onto the opening of the outer container W3.

[0019] (Inner plug component) The inner plug member 11 is attached to the mouth W1 of the container body W and has a communication hole 21 that communicates with the inside of the inner container W2. The inner plug member 11 is formed in a cylindrical shape with a top, having an inner plug top wall 22 and an inner plug peripheral wall 23, and is disposed coaxially with the container axis O. A communication hole 21 that passes through in the vertical direction is formed in the inside plug top wall 22. The communication hole 21 is disposed coaxially with the axis O of the container. The inner plug peripheral wall 23 is formed in a double-cylinder shape having an outer cylinder 23a and an inner cylinder 23b. The lower ends of the outer cylinder 23a and the inner cylinder 23b are connected to each other. The outer cylinder 23a is tightly fitted into the mouth W1 of the container body W. A flange portion 23c is formed at the upper end of the outer cylinder 23a, protruding radially outward and positioned at the upper opening edge of the mouth W1.

[0020] (non-return valve) The check valve 12 includes a valve body 24, a fixed portion 25, and an elastic connecting piece 26, and closes the communication hole 21 in an openable manner. The valve body 24 is formed in a flat plate shape with its front and back surfaces facing up and down, and is in close contact with the opening periphery of the communication hole 21 on the upper surface of the inner plug top wall 22 of the inner plug member 11 so as to be able to move upward and away from it. The fixing portion 25 is formed in a cylindrical shape and is fitted onto the upper end of the inner tube 23b of the inside plug peripheral wall 23 and fixed thereto. The elastic connecting pieces 26 radially connect the outer peripheral surface of the valve body 24 and the upper end of the inner peripheral surface of the fixing portion 25. Three elastic connecting pieces 26 are provided at equal intervals in the circumferential direction. The check valve 12 constitutes a so-called three-point valve.

[0021] (Discharge member) The discharge member 13 includes a covering portion 31 and a mounting portion 32 . The mounting portion 32 is formed in a cylindrical shape and is fitted and fixed within the upper end of the outer cylinder 23a of the inside plug peripheral wall 23. The upper part of the mounting portion 32 protrudes upward from the outer cylinder 23a. The covering portion 31 covers the communication hole 21 from above and has a discharge hole 28 for the contents. The covering portion 31 protrudes radially inward from the vertical middle portion of the attachment portion 32. The covering portion 31 is formed in a plate shape with its front and back surfaces facing vertically, and extends upward as it moves radially inward. A restricting protrusion 33 protruding upward is provided on the upper surface of the covering portion 31 around the opening periphery of the discharge hole 28. The restricting protrusion 33 is formed in a cylindrical shape. The upper opening edges of the restricting protrusion 33 and the mounting portion 32 are located at the same vertical position. The restricting protrusion 33 and the discharge hole 28 are arranged coaxially with the container axis O. The restricting projection 33 is not limited to a cylindrical shape extending continuously over the entire circumferential length, but may be, for example, a plurality of plate bodies provided at intervals in the circumferential direction.

[0022] (application plug) Applicator plug 14 includes an elastic cylindrical portion 35, an applicator portion 36, and a plug fixing portion 37, and is provided between inner plug member 11 and discharge member 13. Applicator plug 14 is formed from a soft material such as silicone rubber or elastomer.

[0023] The elastic cylindrical portion 35 is formed in a topped cylindrical shape having an elastic top wall (top wall) 38 and an elastic peripheral wall 39, and is disposed coaxially with the container axis O. The elastic cylindrical portion 35 covers the communication hole 21 and the valve body 24 from above. The elastic cylindrical portion 35 defines a storage chamber X that can communicate with the communication hole 21 between itself and the inner plug top wall 22 of the inner plug member 11. The elastic top wall 38 is formed in a flat plate shape with its front and back surfaces facing up and down. The elastic peripheral wall 39 extends radially inward as it extends upward. The applicator 36 is provided on the elastic top wall 38 and protrudes upward from the covering portion 31 through the discharge hole 28. The applicator 36 is formed in a rod shape extending in the vertical direction and is disposed coaxially with the container axis O. The upper end surface of the applicator 36 is located above the upper opening edges of the restricting projection 33 and the mounting portion 32. The amount by which the applicator 36 protrudes upward from the restricting projection 33 is smaller than the vertical distance between the lower surface of the elastic top wall 38 and the upper surface of the valve body 24 of the check valve 12. The plug fixing portion 37 is formed in a cylindrical shape extending in the vertical direction. The plug fixing portion 37 extends downward from the lower end opening edge of the elastic cylindrical portion 35 and is inserted and fixed between the inner circumferential surface of the outer tube 23a and the outer circumferential surface of the inner tube 23b of the inner plug peripheral wall 23. The thickness of the plug fixing portion 37 is thicker than the thickness of the elastic cylindrical portion 35. An upward-facing step is formed on the outer circumferential surface of the plug fixing portion 37, and the lower end opening edge of the mounting portion 32 of the discharge member 13 abuts against this step.

[0024] The elastic top wall 38 is formed with slits 41 that block communication between the reservoir chamber X and the discharge hole 28 and expand when the elastic tubular portion 35 is compressed and deformed downward to allow communication between the reservoir chamber X and the discharge hole 28. As shown in FIG. 2 , two to four slits 41 are provided at equal intervals around the circumferential direction so as to surround the applicator portion 36 from the radial outside. The slits 41 extend in a direction perpendicular to the radial direction when viewed from the top-bottom direction. The length of the slits 41 is 2 mm to 3 mm. The slits 41 face the lower surface of the covering portion 31 of the discharge member 13 in the vertical direction. The portion of the elastic top wall 38 where the slits 41 are formed is in contact with or close to the discharge member 13. In the illustrated example, the elastic top wall 38 and the elastic peripheral wall 39 are in contact with or close to the lower surface of the covering portion 31 of the discharge member 13.

[0025] At least the upper portion of elastic circumferential wall 39, which is continuous with elastic top wall 38, is formed to be elastically deformable. The portion of elastic top wall 38 where slits 41 are formed is formed to be thicker than the upper portion of elastic circumferential wall 39. The entire elastic top wall 38, except for outer peripheral edge 38a which is continuous with the upper portion of elastic circumferential wall 39, is formed to be thicker than the upper portion of elastic circumferential wall 39. The boundary portion of elastic top wall 38 between outer peripheral edge 38a and the portion located radially inward of outer peripheral edge 38a forms a step facing radially outward. The portion of elastic top wall 38 that is located radially inward from outer peripheral edge 38a protrudes downward from outer peripheral edge 38a. The thickness of outer peripheral edge 38a of elastic top wall 38 is approximately 0.6 mm, while the portion that is located radially inward from outer peripheral edge 38a and where slits 41 are formed is approximately 1.0 mm. The thickness of outer peripheral edge 38a of elastic top wall 38 is the same as the thickness of the upper part of elastic peripheral wall 39.

[0026] The storage chamber X is formed in a flat shape whose vertical size is equal to or smaller than its radial size. The vertical distance between the lower surface of the elastic top wall 38 and the upper surface of the valve body 24 of the check valve 12 is equal to or smaller than the radial size of the lower end of the storage chamber X. For example, the vertical size of the storage chamber X is 26% to 80% of the radial size of the storage chamber X. In the illustrated example, the vertical distance between the lower surface of the elastic top wall 38 and the upper surface of the valve body 24 of the check valve 12 is approximately 3.2 mm, the radial size of the lower end of the storage chamber X is approximately 10.7 mm, and the vertical distance between the lower surface of the elastic top wall 38 and the upper surface of the valve body 24 of the check valve 12 is approximately 29.9% of the radial size of the lower end of the storage chamber X. The storage chamber X has a circular shape when viewed from above and below, and the diameter of the storage chamber X decreases as it goes upward.

[0027] (Applicator and fixing ring) The applicator member 15 is formed of an elastically deformable porous material such as a sponge, etc. The applicator member 15 covers the discharge member 13 and the applicator plug 14 from above. The fixing ring 16 is fitted onto and fixed to the flange portion 23c of the inside plug peripheral wall 23 and the mounting portion 32 of the discharge member 13. The fixing ring 16 and the outer peripheral surface of the mounting portion 32 clamp and fix the outer peripheral edge portion of the applicator member 15 in the radial direction over the entire circumference.

[0028] (Action of application container) Next, a description will be given of the operation of the application container 1 configured as above. It is assumed that the content is stored in the storage chamber X.

[0029] First, the cap 17 is removed from the mouth portion W1 to expose the applicator 15. At this time, the slit 41 of the elastic cylindrical portion 35 is closed, and the portion of the elastic top wall 38 where the slit 41 is formed (hereinafter referred to as the slit portion) is in contact with or close to the discharge member 13. Therefore, even if the weight of the contents of the storage chamber X is applied to the elastic top wall 38 when the application container 1 is in an inverted position, the slit portion is in close contact with the underside of the covering portion 31 of the discharge member 13, thereby preventing the contents of the storage chamber X from leaking out of the storage chamber X through the slit 41 and preventing the contents of the inner container W2 from flowing into the storage chamber X through the communicating hole 21.

[0030] Next, as shown in FIG. 3, with the applicator container 1 in an inverted position, the applicator portion 36 of the applicator stopper 14 is pressed against the area to be coated via the applicator member 15. This pushes the applicator portion 36 toward the reservoir X through the discharge hole 28, compressing and deforming the elastic tubular portion 35 in the vertical direction, widening the slit 41, and connecting the reservoir X to the discharge hole 28. As this occurs, the reservoir X is pressurized due to the compressive deformation of the elastic tubular portion 35, causing the contents of the reservoir X to be discharged through the slit 41 and the discharge hole 28 into the area to be coated. Furthermore, the check valve 12 maintains the communication hole 21 in a closed state. Therefore, with communication between the inner container W2 and the reservoir X through the communication hole 21 blocked, only the amount of contents stored in the reservoir X can be discharged to the area to be coated. The contents discharged to the area to be coated are then applied to the area by, for example, rubbing the applicator portion 36 and the applicator member 15 against the area to be coated.

[0031] Next, when the pressing of the applicator part 36 against the part to be applied is released, the elastic tubular part 35 undergoes restoring deformation, causing the applicator part 36 to protrude from the discharge hole 28 and undergo restoration displacement, and the slit 41 is closed, blocking communication between the reservoir chamber X and the discharge hole 28. Consequently, negative pressure is created within the reservoir chamber X, elastically deforming the elastic connecting piece 26, causing the valve body 24 to move away from the inner plug top wall 22 and opening the communication hole 21. As a result, the interior of the inner container W2 and the reservoir chamber X are connected through the communication hole 21, and the contents within the inner container W2 flow into the reservoir chamber X through the communication hole 21 and are stored therein. At this time, when the inner container W2 undergoes volume reduction deformation due to the decrease in the contents, a negative pressure is created between the inner container W2 and the outer container W3, and outside air is drawn into the gap between the inner container W2 and the outer container W3 through the intake hole of the outer container W3, thereby maintaining the inner container W2 in its volume-reduced and deformed state.

[0032] As described above, according to the applicator container 1 of this embodiment, the portion of the elastic top wall 38 in which the slit 41 is formed is formed thicker than the upper portion of the elastic peripheral wall 39 which is connected to the elastic top wall 38 and is formed to be elastically deformable.Therefore, when the applicator portion 36 is pressed against the part to be applied and the elastic cylindrical portion 35 is elastically deformed, it is possible to prevent the slit 41 from widening too much, and when the pressure of the applicator portion 36 against the part to be applied is released, the slit 41 can be closed instantly. This makes it possible to prevent the elastic cylindrical portion 35 from beginning to restore its original shape before the slit 41 closes after the application portion 36 is released from pressing against the application portion, and allows the specified amount of contents to be stored in the storage chamber X.

[0033] Two to four slits 41 are provided at equal intervals around the circumference in the elastic top wall 38 so as to surround the application section 36 from the radial outside, which makes it possible to reduce the discrepancy in the timing at which each slit 41 opens and closes, and after the application section 36 is released from pressing against the application section, the specified amount of contents can be reliably stored in the storage chamber X. Here, the negative pressure in the inner container W2 was measured when the application part 36 was pressed down to elastically deform the elastic cylindrical part 35, and then the application part 36 was released to allow the elastic cylindrical part 35 to return to its original deformation.The negative pressure was approximately 0.7 kPa when there was one slit, approximately 1.0 kPa when there were five slits, and approximately 1.2 kPa when there were two to four slits.It was confirmed that if the number of slits was between two and four, the suction force of the content liquid in the inner container W2 into the storage chamber X was increased compared to other numbers of slits.

[0034] Because the storage chamber X is formed in a flat shape whose vertical size is equal to or smaller than its radial size, when the applicator part 36 is pressed against the part to be applied, it is possible to greatly reduce the internal volume of the storage chamber X without significantly compressing and deforming the elastic cylindrical part 35 in the vertical direction, and when the elastic cylindrical part 35 is restored and deformed, a large amount of the contents in the inner container W2 can flow into the storage chamber X. This reduces the number of times the applicator part 36 is pressed against the part to be applied and the number of times it is released, which are required until the contents in the inner container W2 are filled into the storage chamber X.

[0035] Since a restricting protrusion 33 protruding upward is provided on the periphery of the opening of discharge hole 28 in discharge member 13, when applicator portion 36 is pressed against the part to be applied, restricting protrusion 33 abuts against the part to be applied, thereby restricting applicator portion 36 from being pushed further into reservoir chamber X. At this time, the amount by which applicator portion 36 protrudes upward from restricting protrusion 33 is smaller than the vertical distance between the lower surface of elastic top wall 38 and the upper surface of valve body 24 of check valve 12. Therefore, when applicator portion 36 is pressed against the part to be applied, elastic top wall 38 does not press the upper surface of valve body 24 downward, and it is possible to prevent valve body 24 from being difficult to move upward from communicating hole 21 when reservoir chamber X becomes negative pressure.

[0036] 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.

[0037] For example, the restricting protrusion 33 may not be provided. The container body W may have a configuration in which a gap is provided between the inner container W2 and the outer container W3, for example. The body of the outer container W3 may be formed to be deformable by squeezing. The elastic top wall 38 may be provided with one slit 41 or three or more slits 41 spaced equally apart in the circumferential direction so as to surround the applicator part 36 from the outside in the radial direction. The size of the storage chamber X in the vertical direction may be larger than the size of the storage chamber X in the radial direction. The amount by which the applicator portion 36 projects upward from the restricting projection 33 may be equal to or greater than the vertical distance between the lower surface of the elastic top wall 38 and the upper surface of the valve body 24 of the check valve 12 . A portion of the elastic top wall 38 located radially inward from the outer peripheral edge 38a may protrude upward from the outer peripheral edge 38a. The thickness of the elastic top wall 38 may be varied as desired.

[0038] 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.

[0039] The aspects of the present invention are as follows, for example. <1> a container body including an inner container that accommodates contents and undergoes volume reduction deformation as the contents decrease, and an outer container that houses the inner container and has an air intake hole between the inner container and the outer container for drawing in outside air; an inner plug member attached to the opening of the container body and having a communication hole communicating with the inside of the inner container; a check valve that is in close contact with an opening peripheral edge of the communication hole in the inner plug member so as to be able to separate upward; a discharge member that covers the communication hole from above and has a discharge hole for the contents formed therein; an application plug provided between the inner plug member and the discharge member, The application plug is an elastic cylindrical portion formed in a topped cylindrical shape, covering the communication hole from above, and defining a storage chamber between the inner plug member and the elastic cylindrical portion; an application portion provided on a top wall of the elastic cylindrical portion and protruding upward from the discharge member through the discharge hole, A slit is formed in the top wall of the elastic cylindrical portion, which blocks communication between the storage chamber and the discharge hole and expands when the elastic cylindrical portion is compressed and deformed downward to communicate between the storage chamber and the discharge hole; At least an upper portion of the peripheral wall of the elastic cylindrical portion, which is continuous with the top wall of the elastic cylindrical portion, is formed to be elastically deformable, The applicator container, wherein a portion of the top wall of the elastic cylindrical portion where the slit is formed is formed to be thicker than an upper portion of the peripheral wall of the elastic cylindrical portion. <2> The slits are provided in the top wall of the elastic cylindrical portion at equal intervals in the circumferential direction so as to surround the applicator portion from the outside in the radial direction, and the number of the slits is two to four. <1> The application container according to claim 1. <3> The storage chamber is formed in a flat shape whose vertical size is equal to or smaller than the size in a radial direction intersecting the container axis when viewed from the vertical direction. <1> or <2> The application container according to claim 1. <4> a restricting protrusion protruding upward is provided on a peripheral edge of the opening of the discharge hole in the discharge member, a protruding amount of the application portion protruding upward from the restricting protrusion is smaller than a vertical distance between a top wall of the elastic cylindrical portion and the check valve; <1> from <3> 10. An application container according to any one of the above. [Explanation of symbols]

[0040] 1 Application container 11 Inner plug member 12 Check valve 13 Discharge member 14 Application stopper 21 Communication hole 28 Discharge hole 33 Regulating protrusion 35 Elastic cylindrical part 36 Application section 38 Elastic top wall (top wall) 39 Elastic peripheral wall (peripheral wall) 41 Slit W container body W1 Mouth W2 inner container W3 outer container X Storage Chamber

Claims

1. a container body including an inner container that accommodates contents and undergoes volume reduction deformation as the contents decrease, and an outer container that houses the inner container and has an air intake hole between the inner container and the outer container for drawing in outside air; an inner plug member attached to the opening of the container body and having a communication hole communicating with the inside of the inner container; a check valve that is in close contact with an opening peripheral edge of the communication hole in the inner plug member so as to be able to separate upward; a discharge member that covers the communication hole from above and has a discharge hole for the contents formed therein; an application plug provided between the inner plug member and the discharge member, The application plug is an elastic cylindrical portion formed in a topped cylindrical shape, covering the communication hole from above, and defining a storage chamber between the inner plug member and the elastic cylindrical portion; an application portion provided on a top wall of the elastic cylindrical portion and protruding upward from the discharge member through the discharge hole, A slit is formed in the top wall of the elastic cylindrical portion, which blocks communication between the storage chamber and the discharge hole and expands when the elastic cylindrical portion is compressed and deformed downward to communicate between the storage chamber and the discharge hole; At least an upper portion of the peripheral wall of the elastic cylindrical portion, which is continuous with the top wall of the elastic cylindrical portion, is formed to be elastically deformable, The applicator container, wherein a portion of the top wall of the elastic cylindrical portion where the slit is formed is formed to be thicker than an upper portion of the peripheral wall of the elastic cylindrical portion.

2. The applicator container according to claim 1 , wherein the slits are provided in the top wall of the elastic cylindrical portion in a number of two to four, spaced equally apart in the circumferential direction, so as to surround the applicator portion from the radial outside.

3. The applicator container according to claim 1 or 2, wherein the storage chamber is formed in a flat shape whose vertical size is equal to or smaller than a size in a radial direction intersecting with an axis of the container when viewed from the vertical direction.

4. a restricting protrusion protruding upward is provided on a peripheral edge of the opening of the discharge hole in the discharge member, 3. The applicator container according to claim 1, wherein the amount by which the applicator portion projects upward from the restricting projection is smaller than the vertical distance between the top wall of the elastic cylindrical portion and the check valve.

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