Discharge container

Abstract

To provide a discharge container which enables air replacement in a container body to be performed properly and can inhibit leakage of a content through an outside air introduction hole.SOLUTION: A discharge container 1 includes a container body 2, and a pump mechanism 3. The pump mechanism 3 includes: a cylinder 30 in which a content introduction hole 30A for introducing a content into the inside is formed at a lower end part 33 and an outside air introduction hole 30B for introducing outside air into the container body 2 is formed at a peripheral wall part 32; a cylinder cover 50 which is externally fitted on the cylinder 30 in a state that the content introduction hole 30A and the inside of the container body 2 communicate with each other and forms an outside air communication passage 70 communicating with the outside air introduction hole 30B with the cylinder 30; and a pipe 60 which is provided at the cylinder cover 50 and allows communication between the outside air communication passage 70 and an area near a bottom part 2d of the container body 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a dispenser.

Background Art

[0002] As a dispenser, for example, a two-liquid mixing container described in Patent Document 1 below is known. This two-liquid mixing container includes a first container provided with a pressure accumulation pump and a second container. The first container is used in an inverted posture to mix the first content liquid with the second content liquid accommodated in the second container. The first container is a sealed container capable of ejecting the first content liquid from the ejection port of the pressure accumulation pump without replacing the first content liquid with air.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Specifically, the first container is a laminated peeling container (delamination container) including an inner layer body deformable so as to reduce the volume as the first content liquid is ejected, an outer layer body that houses the inner layer body inside, and an outside air introduction port through which outside air can be introduced between the inner layer body and the outer layer body. However, there is a desire to apply this structure to other than the delamination container.

[0005] The present invention has been made in view of such circumstances, and an object thereof is to provide a dispenser that can appropriately perform air replacement in the container body and suppress leakage of the content through the outside air introduction hole.

Means for Solving the Problems

[0006] (1) The dispenser according to the present invention includes a container body for accommodating the content, and a pump mechanism attached to the mouth of the container body and having a discharge hole for discharging the content. The pump mechanism has a cylinder with a content introduction hole for introducing the content therein formed at the lower end, and an outside air introduction hole for introducing outside air into the container body formed in the peripheral wall portion. A stem is disposed so as to be movable downward in an upwardly biased state with respect to the cylinder, and communicates the cylinder with the discharge hole. A piston is fitted in the cylinder so as to be slidable up and down, and is linked to the vertical movement of the stem. A check valve allows the flow of the content from the container body to the cylinder through the content introduction hole and restricts the flow of the content from the cylinder to the container body through the content introduction hole. A cylinder cover is externally fitted to the cylinder in a state where the content introduction hole communicates with the inside of the container body, and forms an outside air communication passage communicating with the outside air introduction hole between the cylinder cover and the cylinder. A pipe is provided on the cylinder cover and communicates the outside air communication passage with the vicinity of the bottom of the container body.

[0007] According to the dispenser of the present invention, by moving the stem, which is upwardly biased with respect to the cylinder, downward, the inside of the cylinder can be pressurized by the piston while keeping the check valve closed, and the content in the cylinder can be discharged from the discharge hole through the stem. After discharging the content, when the piston moves upward together with the stem due to the upward biasing of the stem, the inside of the cylinder becomes negative pressure and the check valve opens, allowing the content in the container body to be supplied into the cylinder. When the inside of the container body becomes negative pressure due to the movement of the content from the container body into the cylinder, outside air is introduced through the outside air introduction hole formed in the peripheral wall portion of the cylinder. A cylinder cover is externally fitted to the cylinder, and the outside air that has passed through the outside air introduction hole flows through the outside air communication passage formed between the cylinder and the cylinder cover, and flows out from the tip of the pipe attached to the cylinder cover into the container body, releasing the negative pressure in the container body. Here, since the pipe attached to the cylinder cover extends to near the bottom of the container body, when used in an inverted posture with the mouth of the container body facing downward, the tip of the pipe is positioned above the liquid level. For example, even when the internal pressure of the container body rises, it becomes difficult for the contents inside the container body to reach the outside air introduction hole from the tip of the pipe via the outside air communication flow path. Therefore, the air replacement inside the container body can be appropriately performed, and leakage of the contents through the outside air introduction hole can be suppressed. Further, since the cylinder cover is externally fitted to the cylinder in a state where the content introduction hole and the inside of the container body are in communication, an outside air communication flow path through which outside air circulates can be formed independently of the flow path of the contents without hindering the flow of the contents. Thereby, compared with a structure in which the flow path of the contents and the outside air communication flow path are shared, the structure can be simplified.

[0008] (2) A sealing portion for sealing between the cylinder and the cylinder cover may be provided at a position above the outside air introduction hole.

[0009] In this case, when used in an inverted posture with the mouth of the container body facing downward, it becomes difficult for the contents inside the container body to reach the outside air introduction hole via between the cylinder and the cylinder cover. Therefore, leakage of the contents through the outside air introduction hole can be suppressed.

Advantages of the Invention

[0010] According to the ejector according to the present invention, air replacement inside the container body can be appropriately performed, and leakage of the contents through the outside air introduction hole can be suppressed.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Best Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments of the dispenser according to the present invention will be described with reference to the drawings.

[0013] As shown in FIG. 1, the dispenser 1 of the present embodiment includes a container body 2 for storing the content, and a pump mechanism 3 attached to the mouth portion 2a of the container body 2 for discharging the content. The pump mechanism 3 has a discharge hole 3a for discharging the content, and includes a mounting portion 4 that is detachably mounted on a container different from the dispenser 1.

[0014] In addition, each component of the dispenser 1 is formed using synthetic resin, metal, or the like unless otherwise specified. The content is not particularly limited, and examples thereof include liquids such as foods, fragrances, drugs, cosmetics, disinfectants, and detergents.

[0015] The container body 2 includes a mouth portion 2a, a shoulder portion 2b, a body portion 2c, and a bottom portion 2d, and these are connected in this order in a schematic configuration in which their respective central axes are located on a common axis. The diameter of the body portion 2c is larger than that of the mouth portion 2a. A male screw portion is formed on the outer peripheral surface of the mouth portion 2a.

[0016] Hereinafter, the common axis is referred to as axis O, the side of the mouth portion 2a along the direction of axis O is referred to as the upper side, the side of the bottom portion 2d is referred to as the lower side, the direction along axis O is referred to as the vertical direction, the direction intersecting axis O when viewed from the vertical direction is referred to as the radial direction, and the direction of orbiting around axis O when viewed from the vertical direction is referred to as the circumferential direction. A state in which the discharge hole 3a is located above and the container body 2 is located below is referred to as an upright state. Note that the description of the structure of the dispenser 1 is made based on the dispenser 1 in the upright state.

[0017] The pump mechanism 3 includes a mounting cap 10, a stem 20, a cylinder 30, a piston 40, a cylinder cover 50, and a pipe 60. The mounting cap 10 is formed in a toped cylindrical shape, and an internal thread portion that engages with the male thread portion of the mouth portion 2a of the container body 2 is formed on the inner peripheral surface of its peripheral wall. An insertion hole penetrating in the vertical direction is formed at the center of the top wall portion of the mounting cap 10, and the stem 20 is inserted through this insertion hole with a gap therebetween.

[0018] On the upper surface of the top wall portion of the mounting cap 10, a guide cylinder 10a erected upward is integrally formed. The guide cylinder 10a is disposed radially outside the opening peripheral edge portion of the insertion hole in the top wall portion of the mounting cap 10. The guide cylinder 10a is a member that guides the mounting portion 4, and a plurality of guide grooves 10b extending in the vertical direction are formed at intervals in the circumferential direction on the inner peripheral surface of the guide cylinder 10a.

[0019] The mounting portion 4 is formed in a bottomed cylindrical shape disposed coaxially with the axis O and is configured to be attachable to the mouth portion of another container 100. A nozzle cylinder 11 is provided on the bottom wall portion of the mounting portion 4 so as to penetrate the bottom wall portion in the vertical direction. That is, the bottom wall portion of the mounting portion 4 is integrally connected to the outer peripheral surface of the intermediate portion of the nozzle cylinder 11 in the vertical direction. A discharge hole 3a is formed at the upper end of the nozzle cylinder 11. The lower end portion of the nozzle cylinder 11 is fitted inside the upper end portion of the stem 20.

[0020] On the bottom wall portion of the mounting portion 4, a first surrounding cylinder 12 that protrudes upward and surrounds the nozzle cylinder 11 from the radially outside is integrally formed. An internal thread portion 14 for screwing with another container 100 shown in FIG. 2 is formed on the inner peripheral surface of the first surrounding cylinder 12. Note that the internal thread portion 14 may not be formed, and the mounting portion 4 may be attachable to the mouth portion of another container 100 without rotating around the axis O. A plurality of ribs 13 extending in both the vertical and radial directions are formed at intervals in the circumferential direction on the inner peripheral surface of the lower end portion of the first surrounding cylinder 12. Note that instead of the ribs 13, an annular stepped portion extending in the circumferential direction may be provided on the inner peripheral surface of the lower end portion of the mounting portion 4.

[0021] On the bottom wall portion of the mounting portion 4, a second surrounding cylinder 15 is integrally formed which protrudes downward and surrounds the nozzle cylinder 11 from the radially outer side. On the outer peripheral surface of the lower end portion of the second surrounding cylinder 15, a plurality of engaging claws 16 protruding radially outward are formed at intervals in the circumferential direction. The plurality of engaging claws 16 are slidably fitted in the plurality of guide grooves 10b in the guide cylinder 10a in the vertical direction. For this reason, the pump mechanism 3 and the mounting portion 4 can move relative to each other in the vertical direction without rotating relative to each other about the axis O.

[0022] The stem 20 is a cylindrical member that allows the contents in the container body 2 to flow toward the discharge hole 3a. The stem 20 is arranged coaxially with the axis O. The upper end portion of the stem 20 is externally fitted to the lower end portion of the nozzle cylinder 11 of the mounting portion 4, and the stem 20 is integrally movable up and down with the nozzle cylinder 11. The lower end portion of the stem 20 has a larger diameter than the portion above it.

[0023] The cylinder 30 is formed in a bottomed cylindrical shape having a bottom wall portion 31 and a peripheral wall portion 32. On the bottom wall portion 31, a lower end portion 33 protruding downward is formed, and a contents introduction hole 30A opening radially is formed in the lower end portion 33. In the peripheral wall portion 32, an outside air introduction hole 30B for introducing outside air into the container body 2 is formed to penetrate radially.

[0024] A flange portion 34 extending radially outward is formed at the upper end opening edge of the cylinder 30. The flange portion 34 is sandwiched between the top wall portion of the mounting cap 10 and the upper end opening edge of the mouth portion 2a together with the packing 5 formed of an elastic member, and thereby the cylinder 30 is held in the container body 2.

[0025] On the bottom wall portion 31 of the cylinder 30, a check valve 37 is provided that allows the flow of the contents from the container body 2 to the cylinder 30 through the contents introduction hole 30A and restricts the flow of the contents from the cylinder 30 to the container body 2 through the contents introduction hole 30A. The check valve 37 of the present embodiment is a three-way valve, but a valve body with other structures may also be used. The check valve 37 includes a beam portion 38 that straddles the upper part of the three-way valve in the radial direction. The contents pass through the gaps on both sides of the beam portion 38 and are introduced into the cylinder 30.

[0026] A first annular member 35 is fitted inside the upper end portion of the cylinder 30. The first annular member 35 has a flange portion that protrudes radially outward, and the first annular member 35 is fixed to the cylinder 30 by sandwiching the flange portion between the flange portion 34 of the cylinder 30 and the top wall portion of the mounting cap 10.

[0027] A stem 20 is inserted inside the first annular member 35 so as to be slidable up and down. On the surface of the first annular member 35 facing downward, the enlarged diameter portion at the lower end of the stem 20 faces in the vertical direction, and the first annular member 35 restricts the stem 20 from coming out above the first annular member 35.

[0028] A second annular member 24 is engaged with the outer peripheral surface of the upper end portion of the stem 20, and the second annular member 24 is integrally movable up and down with the stem 20. A biasing member 25 is disposed between the first annular member 35 and the second annular member 24. The biasing member 25 is a coil spring, is disposed coaxially with the axis O, and biases the stem 20 upward. Note that the biasing member 25 is not limited to a coil spring and may be a resin spring or the like.

[0029] The stem 20 is provided with a holding cylinder 21 attached from below. The holding cylinder 21 is formed in a bottomed cylindrical shape, the upper end portion thereof is fitted into the stem 20, and it is integrally movable up and down with the stem 20. A plurality of holes 22 penetrating in the radial direction are formed at intervals in the circumferential direction on the peripheral wall of the holding cylinder 21. An annular holding portion 23 arranged coaxially with the axis O is formed on the outer peripheral surface of the lower end portion of the holding cylinder 21. A piston 40 is disposed between the holding portion 23 and the lower end opening edge of the stem 20.

[0030] The piston 40 is relatively movable in the vertical direction with respect to the stem 20 and the holding cylinder 21 between the holding portion 23 and the lower end opening edge of the stem 20. When the piston 40 is in contact with the holding portion 23 of the holding cylinder 21, the flow of the content from inside the stem 20 toward the cylinder 30 is restricted, and when the piston 40 is in contact with the lower end opening edge of the stem 20, the flow of the content from the cylinder 30 toward the inside of the stem 20 is allowed. The regulation and allowance of the flow of the content by the piston 40 will be described in detail in the operation of the ejector 1 described later. Note that the outside air introduction hole 30B is blocked by the piston 40 when the stem 20 is at the rising end position.

[0031] The cylinder cover 50 is formed in a bottomed cylindrical shape having a bottom wall 51 and a peripheral wall 52. An engaging cylinder 53 is provided on the bottom wall 51 of the cylinder cover 50 so as to penetrate the bottom wall 51 in the vertical direction. The engaging cylinder 53 is engaged with the outer peripheral surface of the lower end portion 33 of the cylinder 30. By engaging the engaging cylinder 53 with the lower end portion 33, the cylinder cover 50 is fixed in a state where the content introduction hole 30A is exposed into the container body 2.

[0032] The cylinder cover 50 covers the bottom wall portion 31 of the cylinder 30 and the peripheral wall portion 32 where the outside air introduction hole 30B is formed from the outside. The upper end opening edge of the cylinder cover 50 is disposed below the flange portion 34 of the cylinder 30 and is located inside the mouth portion 2a. The cylinder cover 50 forms an outside air communication passage 70 communicating with the outside air introduction hole 30B between it and the cylinder 30.

[0033] The bottom wall 51 of the cylinder cover 50 is spaced downward from the bottom wall portion 31 of the cylinder 30. Further, the peripheral wall 52 of the cylinder cover 50 is spaced radially outward from the peripheral wall portion 32 of the cylinder 30. A sealing portion 71 for sealing between the cylinder 30 and the cylinder cover 50 is formed at an upper position of the outside air introduction hole 30B.

[0034] The sealing portion 71 prevents the content from being introduced into the outside air communication passage 70 from the gap between the peripheral wall portion 32 of the cylinder 30 and the upper end opening of the cylinder cover 50. The sealing portion 71 of the present embodiment is an annular convex portion protruding radially inward from the peripheral wall 52 of the cylinder cover 50, but the annular convex portion may be formed on the cylinder 30 side.

[0035] The container body 2 is provided with a flange portion 2e that faces the mounting cap 10 in the vertical direction below the male screw portion on the outer peripheral surface of the mouth portion 2a. Below the flange portion 2e, a constricted portion 2f that is close to the peripheral wall 52 of the cylinder cover 50 is formed. By the constricted portion 2f, the volume of the container body 2 above the content introduction hole 30A is reduced, so that the volume of the content that is not introduced into the content introduction hole 30A when the ejector 1 is in an inverted posture can be reduced as described later.

[0036] On the lower surface of the bottom wall 51 of the cylinder cover 50, a mounting cylinder 54 that communicates with the outside air communication passage 70 is vertically provided downward on the radially outer side of the engagement cylinder 53. The upper end portion of the pipe 60 is fitted into the mounting cylinder 54. The lower end portion (tip) of the pipe 60 extends to the vicinity of the bottom portion 2d of the container body 2. That is, the pipe 60 communicates the outside air communication passage 70 with the vicinity of the bottom portion 2d of the container body 2.

[0037] Subsequently, the operation of the ejector 1 will be described. When discharging the contents from the discharger 1 and supplying the contents into another container 100 different from the discharger 1, the operation is performed in an inverted state where the container body 2 is positioned upward and the discharge hole 3a is positioned downward along the axis O as shown in FIG. 2. Hereinafter, when explaining the operation of the discharger 1, the vertical relationship will be explained based on the discharger 1 in the inverted state. That is, regarding the expression of the vertical direction, in the explanation during the operation (use), it is opposite to the definition in the upright state described above.

[0038] Hereinafter, although the operation mode of supplying the contents into another container 100 will be described, it is not limited thereto, and for example, it may be a mode of supplying the contents into a container such as a cup. Further, the discharger 1 of the present embodiment may be used as a two-fluid mixing container that supplies the first contents stored in the container body 2 into another container 100 and mixes it with the second contents stored in the other container 100. Further, the discharger 1 of the present embodiment may be used to supply the contents in the container body 2 to another empty container 100, such as refilling the contents into another container.

[0039] First, the user grips the mounting portion 4 of the discharger 1 in the inverted state and mounts it on the mouth portion of another upright container 100. At this time, the upper end opening edge of the mouth portion of the other container 100 abuts against the lower end portion of the rib 13 of the mounting portion 4. With the contents stored in the container body 2 and the contents stored in the cylinder 30, when the user pushes down the container body 2 against the biasing force of the biasing member 25, the mounting cap 10 moves downward along the engaging claw 16 of the mounting portion 4.

[0040] When the mounting cap 10 moves downward, since the lower end opening edge (the upper end opening edge in the upright state) of the stem 20 abuts against the mounting portion 4, the downward movement of the stem 20 is restricted. Here, since the check valve 37 restricts the flow of the contents from the inside of the cylinder 30 into the container body 2, the internal space of the cylinder 30 decreases and its internal pressure increases due to the relative upward movement of the piston 40 with respect to the cylinder 30.

[0041] When the cylinder 30 moves downward, a frictional force is generated as the inner peripheral surface of the cylinder 30 and the piston 40 slide against each other. Due to this frictional force, the piston 40 moves slightly downward relative to the stem 20 and the holding cylinder 21 until it abuts against the lower end opening edge of the stem 20. Thus, the piston 40 separates from the holding portion 23 of the holding cylinder 21 and a gap is formed.

[0042] Therefore, the contents inside the cylinder 30 with increased internal pressure are discharged from the discharge hole 3a toward the outside of the ejector 1 through the gap between the piston 40 and the holding portion 23, the hole portion 22, the inside of the holding cylinder 21, the inside of the stem 20, and the inside of the nozzle cylinder 11. The contents discharged from the discharge hole 3a are supplied into another container 100.

[0043] When the user releases the pressing down of the container body 2, the biasing force of the biasing member 25 is transmitted to the cylinder 30 through the first annular member 35, and the cylinder 30 moves upward relative to the stem 20 and the like. At this time, a frictional force is generated as the inner peripheral surface of the cylinder 30 and the piston 40 slide against each other. Due to this frictional force, the piston 40 moves slightly upward relative to the stem 20 and the holding cylinder 21. Thus, the piston 40 abuts against the holding portion 23 of the holding cylinder 21.

[0044] In this state, when the cylinder 30 further moves upward relative to the piston 40, the piston 40 moves downward relative to the cylinder 30. Thus, the internal pressure of the cylinder 30 decreases and becomes a negative pressure. When the inside of the cylinder 30 becomes a negative pressure, the check valve 37 opens the content introduction hole 30A, and the contents inside the container body 2 are supplied into the cylinder 30 through the content introduction hole 30A. Thereby, it is possible to prepare for the next discharge of the contents.

[0045] Incidentally, when the content in the container body 2 is supplied into the cylinder 30, the inside of the container body 2 becomes a negative pressure. The negative pressure in the container body 2 is released by introducing outside air into the container body 2 through the outside air introduction hole 30B formed in the peripheral wall portion 32 of the cylinder 30. Specifically, when the user pushes down the container body 2 against the biasing force of the biasing member 25, the outside air introduction hole 30B of the cylinder 30 is opened by the relative upward movement of the piston 40 with respect to the cylinder 30.

[0046] The outside air introduction hole 30B communicates with an outside air communication passage 70 formed between the cylinder 30 and the cylinder cover 50. Further, the outside air communication passage 70 communicates with the vicinity of the bottom 2d of the container body 2 via a pipe 60 attached to the cylinder cover 50. When the outside air introduction hole 30B is opened by the movement of the piston 40, the outside air communication passage 70 communicates with the outside through the gap between the stem 20 and the first annular member 35, the inner space of the guide cylinder 10a and the second surrounding cylinder 15, and the gap between the guide cylinder 10a and the second surrounding cylinder 15. As a result, outside air is introduced into the container body 2 through the outside air introduction hole 30B, the outside air communication passage 70, and the pipe 60, and the negative pressure in the container body 2 is released.

[0047] As described above, the dispenser 1 according to the present embodiment includes a container body 2 for storing the content, and a pump mechanism 3 attached to the mouth portion 2a of the container body 2 and having a discharge hole 3a for discharging the content. The pump mechanism 3 includes a cylinder 30 in which a content introduction hole 30A for introducing the content therein is formed at the lower end portion 33, and an outside air introduction hole 30B for introducing outside air into the container body 2 is formed in the peripheral wall portion 32; a stem 20 disposed so as to be movable downward in an upwardly biased state with respect to the cylinder 30 and communicating the cylinder 30 with the discharge hole 3a; a piston 40 fitted slidably up and down in the cylinder 30 and linked to the vertical movement of the stem 20; a check valve 37 that allows the flow of the content from the container body 2 to the cylinder 30 through the content introduction hole 30A and restricts the flow of the content from the cylinder 30 to the container body 2 through the content introduction hole 30A; a cylinder cover 50 externally fitted to the cylinder 30 in a state where the content introduction hole 30A is in communication with the inside of the container body 2 and forming an outside air communication passage 70 communicating with the outside air introduction hole 30B between the cylinder 30 and the cylinder cover 50; and a pipe 60 provided on the cylinder cover 50 and communicating the outside air communication passage 70 with the vicinity of the bottom portion 2d of the container body 2.

[0048] According to the dispenser 1 of the present embodiment, by moving the stem 20, which is upwardly biased with respect to the cylinder 30, downward, the inside of the cylinder 30 can be pressurized by the piston 40 while keeping the check valve 37 closed, and the content inside the cylinder 30 can be discharged from the discharge hole 3a through the stem 20. After discharging the content, when the piston 40 moves upward together with the stem 20 due to the upward biasing of the stem 20, the inside of the cylinder 30 becomes negative pressure and the check valve 37 opens, allowing the content inside the container body 2 to be supplied into the cylinder 30. When the inside of the container body 2 becomes negative pressure due to the movement of the content from the inside of the container body 2 into the cylinder 30, outside air is introduced from the outside air introduction hole 30B formed in the peripheral wall portion 32 of the cylinder 30. The cylinder 30 has a cylinder cover 50 externally fitted thereto, and the outside air that has passed through the outside air introduction hole 30B passes through the outside air communication passage 70 formed between the cylinder 30 and the cylinder cover 50 and flows out into the container body 2 from the tip of the pipe 60 attached to the cylinder cover 50, releasing the negative pressure inside the container body 2. Here, since the pipe 60 attached to the cylinder cover 50 extends to the vicinity of the bottom 2d of the container body 2, when used in an inverted posture such that the mouth 2a of the container body 2 faces downward, the tip of the pipe 60 is positioned above the liquid level. For example, even when the internal pressure of the container body 2 rises, it becomes difficult for the contents inside the container body 2 to reach the outside air introduction hole 30B from the tip of the pipe 60 via the outside air communication passage 70. Therefore, the air replacement inside the container body 2 can be appropriately performed, and leakage of the contents through the outside air introduction hole 30B can be suppressed. Also, since the cylinder cover 50 is externally fitted to the cylinder 30 with the lower end portion 33 of the cylinder 30 where the content introduction hole 30A is formed exposed, an outside air communication passage 70 through which outside air flows can be formed independently of the flow path of the contents without obstructing the flow of the contents. Thereby, compared with a structure in which the flow path of the contents and the outside air communication passage 70 are shared, the structure can be simplified.

[0049] Further, in the present embodiment, a seal portion 71 for sealing between the cylinder 30 and the cylinder cover 50 is provided at a position above the outside air introduction hole 30B. According to this configuration, when used in an inverted posture such that the mouth 2a of the container body 2 faces downward, it becomes difficult for the contents inside the container body 2 to reach the outside air introduction hole 30B via between the cylinder 30 and the cylinder cover 50. Therefore, leakage of the contents through the outside air introduction hole 30B can be suppressed.

[0050] As described above, one embodiment of the present invention has been described. However, this embodiment is presented as an example and is not intended to limit the scope of the invention. The embodiments of the present invention can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. Also, the embodiments of the present invention and their modifications include, for example, those that can be easily assumed by those skilled in the art, those that are substantially the same, and those within an equivalent range.

[0051] For example, as shown in FIG. 3, the mounting portion 4 may include a lid portion 17 that closes the discharge hole 3a in an openable manner. The lid portion 17 is formed in a toped cylindrical shape, one side in the radial direction is connected to the mounting portion 4 via a hinge 17a, and on the other side in the radial direction, an operation piece 17b that protrudes outward in the radial direction may be provided. The inner peripheral wall of the lid portion 17 may engage with an engagement convex portion 12a formed on the outer peripheral surface of the first surrounding cylinder 12. Further, an annular seal portion 19 that abuts against the opening peripheral edge portion of the nozzle cylinder 11 may be formed on the lower surface of the top wall of the lid portion 17. Note that, during use, the mouth portion of another container 100 may be engaged with the inside or outside in the radial direction of the first surrounding cylinder 12.

[0052] Also, for example, the cylinder cover 50 was externally fitted to the cylinder 30 with the lower end portion 33 of the cylinder 30 exposed, but an opening (passage) that communicates with the content introduction hole 30A and the inside of the container body 2 may be provided in the cylinder cover 50 without exposing the lower end portion 33.

[0053] Also, for example, the pipe 60 was attached to the cylinder cover 50 as a separate part, but the pipe 60 and the cylinder cover 50 may be integrally formed.

Explanation of Reference Numerals

[0054] 1 Dispenser 2 Container body 2a Mouth portion 2b Shoulder portion 2c Barrel portion 2d Bottom portion 2e Flange portion 2f Constriction portion 3 Pump mechanism 3a Discharge hole 4 Mounting portion 5 Packing 10 Mounting cap 10a Guide cylinder 10b Guide groove 11 Nozzle cylinder 12 First surrounding cylinder 12a Engagement convex portion 13 Rib 14 Female screw portion 15 Second surrounding cylinder 16 Engagement claw 17 Cover part 17a Hinge 17b Operation piece 19 Annular seal part 20 Stem 21 Holding cylinder 22 Hole part 23 Holding part 24 Second annular member 25 Biasing member 30 Cylinder 30A Contents introduction hole 30B Outside air introduction hole 31 Bottom wall part 32 Peripheral wall part 33 Lower end part 34 Flange part 35 First annular member 37 Check valve 38 Beam part 40 Piston 50 Cylinder cover 51 Bottom wall 52 Peripheral wall 53 Engagement cylinder 54 Mounting cylinder 60 Pipe 70 Outside air communication flow path 71 Seal part 100 Container O Axis

Claims

1. a container body for containing a content; a pump mechanism mounted on the mouth of the container body and having a discharge hole for discharging the content, and comprising: the pump mechanism includes: a cylinder having a content introduction hole for introducing the content therein formed at a lower end portion and an outside air introduction hole for introducing outside air into the container body formed at a peripheral wall portion; a stem disposed to be movable downward in an upwardly biased state with respect to the cylinder and communicating the cylinder with the discharge hole; a piston fitted in the cylinder so as to be slidable up and down and linked to the vertical movement of the stem; a check valve that allows the flow of the content through the content introduction hole from the container body to the cylinder and restricts the flow of the content through the content introduction hole from the cylinder to the container body; a cylinder cover externally fitted to the cylinder in a state where the content introduction hole communicates with the inside of the container body and forming an outside air communication passage communicating with the outside air introduction hole between the cylinder cover and the cylinder; a pipe provided on the cylinder cover and communicating the outside air communication passage with the vicinity of the bottom of the container body; a dispenser.

2. The dispenser according to claim 1, further comprising a seal portion for sealing between the cylinder and the cylinder cover at a position above the outside air introduction hole. The dispenser according to claim 1.

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