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 pump mechanism 10 having a discharge hole 11 for discharging a content W. The pump mechanism includes a cylinder 30 provided with a first inflow hole 31 and a cylinder cover 70. A first outside air introduction hole 34 is formed at the cylinder and a second inflow hole 71 and a second outside air introduction hole 72 communicating with the inside of a container body are formed in the cylinder cover. An inflow passage 80 allowing communication between the first inflow hole and the second inflow hole, an outside air introduction passage 81 allowing communication between the first outside air introduction hole and the second outside air introduction hole, and an air-tightness part 82 which blocks communication between the inflow passage and the outside air introduction passage are formed between the cylinder and the cylinder cover. The first outside air introduction hole is closed when a piston 50 is located at a highest elevated position and is opened when the piston 50 moves downward from the highest elevated position.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a dispenser.

Background Art

[0002] Conventionally, as shown in Patent Document 1 below, for example, there is known a dispenser having a pump mechanism and suitable for discharging the contents accommodated in a first container body into a second container body different from the first container body. The pump mechanism has a suction hole and a cylinder for the contents, a fixed part attached to the mouth part of the first container body, a piston and a discharge hole for the contents, and an operating part that can move forward and backward in the vertical direction with respect to the fixed part, and a pump chamber whose internal pressure increases and decreases as the operating part moves forward and backward. Further, the operating part has a pressing part that can be pressed against the mouth part of the second container body.

[0003] When discharging the contents, with the first container body in an inverted posture so that the discharge port faces downward, the first container body is pushed down while pressing the pressing part against the mouth part of the second container body. As a result, the operating part can be advanced with respect to the fixed part, and the inside of the pump chamber can be pressurized. Therefore, the contents in the pump chamber can be discharged through the discharge hole and can be mixed in the second container body.

[0004] The first container body is a laminated peelable container (delaminated container) including an inner layer body that accommodates the contents and reduces its volume as the contents decrease, and an outer layer body that accommodates the inner layer body inside. Between the inner layer body and the outer layer body, outside air can be introduced through an outside air introduction hole formed at the bottom of the first container body. Thereby, the inner layer body can be reduced in volume and deformed so as to peel off from the outer layer body as the contents decrease.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In the above-mentioned conventional ejector, it is used in combination with the first container body that is a laminated peeling container. However, there is a need to apply it to a container body (non-delaminating container) that is not a laminated peeling container for various applications and the like. In this case, in order to eliminate the negative pressure in the container body as the content decreases, it is necessary to introduce outside air into the container body for air replacement. Therefore, for example, it is conceivable to form an outside air introduction hole for introducing outside air into the container body in a cylinder. However, for example, when in an inverted posture, the content may enter the outside air introduction hole and the content may leak to the outside.

[0007] The present invention has been made in view of such circumstances, and its purpose is to provide an ejector that can appropriately perform air replacement in the container body and suppress the leakage of the content through the outside air introduction hole.

Means for Solving the Problems

[0008] (1) The dispenser according to the present invention is attached to the mouth of a container body in which the content is stored, and includes a pump mechanism having a discharge hole for discharging the content. The pump mechanism includes a cylinder having a first inflow hole formed at the lower end for allowing the content to flow into the interior thereof, a stem disposed to be movable downward in an upwardly biased state with respect to the cylinder, and having an interior communicating with the interior of the cylinder and the discharge hole, a piston fitted to be vertically slidable within the cylinder and operating in conjunction with the vertical movement of the stem, a check valve provided within the cylinder for allowing the movement of the content from the interior of the container body into the cylinder through the first inflow hole and suppressing the movement of the content from the interior of the cylinder into the container body through the first inflow hole, and a bottomed cylindrical cylinder cover covering the cylinder from the radially outer side and downward. The cylinder is formed with a first outside air introduction hole for introducing outside air, the cylinder cover is formed with a second inflow hole and a second outside air introduction hole communicating with the interior of the container body, and between the cylinder and the cylinder cover, there are formed an inflow passage communicating the first inflow hole and the second inflow hole and guiding the content into the cylinder, an outside air introduction passage communicating the first outside air introduction hole and the second outside air introduction hole and guiding outside air into the container body, and an airtight portion for blocking the communication between the inflow passage and the outside air introduction passage. The first outside air introduction hole is closed when the piston is in the uppermost position and is opened when the piston moves downward from the uppermost position.

[0009] According to the dispenser of the present invention, when discharging the content, the stem that is upwardly biased with respect to the cylinder is moved downward. As a result, the piston can be moved downward from the uppermost position together with the stem. Therefore, the interior of the cylinder can be pressurized while keeping the check valve closed, and the content in the cylinder can be supplied to the discharge hole through the stem. Accordingly, the content can be discharged to the outside through the discharge hole. Incidentally, when discharging the content, the first outside air introduction hole is opened by the piston moving downward from the uppermost position.

[0010] After discharging the contents, by releasing the movement of the stem relative to the cylinder, the stem can be moved upward together with the piston by the upward biasing of the stem. Therefore, the inside of the cylinder can be depressurized (made negative pressure), and the check valve can be opened. As a result, the contents in the container body can be supplied into the cylinder through the second inlet hole, the inlet passage, and the first inlet hole, and preparations can be made for the next discharge. Also, the inside of the container body is depressurized (made negative pressure) by the movement of the contents from the container body into the cylinder. As a result, outside air from the outside can be supplied into the container body through the first outside air introduction hole, the outside air introduction passage, and the second outside air introduction hole. Therefore, air replacement inside the container body can be performed, and the depressurization inside the container body can be eliminated. Note that the first outside air introduction hole is blocked when the piston moves upward (restores) to the uppermost position.

[0011] In particular, since a cylinder cover covering the cylinder is provided, for example, even when used in an inverted posture such that the mouth of the container body faces downward, it is difficult for the contents in the container body to reach the first outside air introduction hole via the second outside air introduction hole and the outside air introduction passage. Moreover, the first outside air introduction hole is blocked when the piston is located at the uppermost position. Therefore, it is possible to suppress the leakage of the contents in the container body to the outside through the outside air introduction hole. Furthermore, the inflow passage and the outside air introduction passage are separated by an airtight portion, and their communication with each other is blocked. Therefore, for example, it is possible to prevent problems such as the outside air in the outside air introduction passage flowing into the cylinder through the introduction passage, causing problems such as poor discharge, or the contents in the introduction passage leaking to the outside through the outside air introduction hole and the first outside air introduction hole.

[0012] (2) The outside air introduction passage may be disposed above the inflow passage, and the airtight portion may airtightly seal the outer peripheral surface of the cylinder and the inner peripheral surface of the cylinder cover so as to vertically separate the inflow passage and the outside air introduction passage over the entire circumference.

[0013] In this case, since the outside air introduction passage can be arranged at a position close to the first outside air introduction hole that is closed when the piston is at the top dead center position, outside air can be introduced into the container body with less resistance through the first outside air introduction hole, the outside air introduction passage, and the second outside air introduction hole. Therefore, air replacement can be easily performed efficiently. Further, since the airtight portion seals the outer peripheral surface of the cylinder and the inner peripheral surface of the cylinder cover airtightly over the entire circumference, the communication between the inflow passage and the outside air introduction passage can be more reliably blocked.

[0014] (3) The second outside air introduction hole is arranged in a portion of the cylinder cover that is located above the first outside air introduction hole. On the inner peripheral surface of the cylinder cover, an arc-shaped seal portion is formed that protrudes radially inward and contacts the outer peripheral surface of the cylinder, and extends along the circumferential direction that circulates around the container axis in a cross-sectional view perpendicular to the container axis of the container body. Between the outer peripheral surface of the cylinder and the inner peripheral surface of the cylinder cover, a non-formed portion of the seal portion may be a communication portion that communicates with the outside air introduction passage and extends along the circumferential direction in the cross-sectional view.

[0015] In this case, since the second outside air introduction hole is arranged above the first outside air introduction hole, for example, at the upper end portion of the cylinder cover, when used in an inverted posture where the mouth portion of the container body faces downward, for example, it becomes more difficult for the content in the container body to reach the first outside air introduction hole via the second outside air introduction hole and the outside air introduction passage. Furthermore, by using the arc-shaped seal portion formed on the inner peripheral surface of the cylinder cover, an arc-shaped communication portion (a non-formed portion of the seal portion) that communicates with the outside air introduction passage is formed between the outer peripheral surface of the cylinder and the inner peripheral surface of the cylinder cover. Moreover, the communication portion is formed such that the length along the circumferential direction is shorter than the length along the circumferential direction of the seal portion. Thereby, since the inside and the outside of the container body are communicated via a narrow range of the communication portion, it is possible to suppress the content in the container body from reaching the first outside air introduction hole even more.

[0016] (4) The inflow path is formed in an arc shape extending along the circumferential direction in a cross-sectional view between the outer peripheral surface of the cylinder and the inner peripheral surface of the cylinder cover, and the communication part and the inflow path may be arranged such that their positions in the circumferential direction are different from each other.

[0017] In this case, since the communication part in an arc shape in plan view and the inflow path in an arc shape in plan view are arranged such that their positions in the circumferential direction are different from each other, for example, when used in an inverted posture where the mouth part of the container body faces downward, it is possible to suppress the movement (rise) of the outside air introduced into the outside air introduction path from the first outside air introduction hole toward the inflow path side through the communication part. Therefore, it is possible to suppress the inconvenience that the outside air flows into the cylinder via the inflow path, and the operating performance of the ejector can be ensured.

[0018] (5) A positioning member for positioning the cylinder cover in the circumferential direction with respect to the cylinder may be provided between the cylinder and the cylinder cover.

[0019] In this case, the cylinder and the cylinder cover can be combined in a state where they are positioned in the circumferential direction using the positioning member. In particular, when the communication part and the inflow path are configured such that their positions in the circumferential direction are different from each other, it is easy to appropriately align the positions of the communication part and the inflow path so as to have such a positional relationship. Furthermore, it is possible to prevent an unintentional circumferential displacement between the cylinder and the cylinder cover during use or the like.

Effects of the Invention

[0020] According to the ejector of the present invention, it is possible to appropriately perform air replacement in the container body and suppress leakage of the content through the outside air introduction hole. Therefore, it can be suitably used for a container body such as a non-delaminated container, and can be an ejector applicable to various uses.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Mode for Carrying Out the Invention

[0022] (First Embodiment) Hereinafter, a first embodiment of a dispenser according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the dispenser 1 of the present embodiment is attached to the mouth portion 3 of a container body 2 in which the content W is accommodated, and has a pump mechanism 10 having a discharge hole 11 for discharging the content W, and a cap member (operation member) 15 that is combined with the pump mechanism 10 so as to be relatively movable.

[0023] In addition, each component of the dispenser 1 is a molded product made of a synthetic resin material unless otherwise specified. The content W is not particularly limited, and examples thereof include liquids such as foods, fragrances, drugs, cosmetics, disinfectants, and detergents.

[0024] Each component constituting the pump mechanism 10 and the cap member 15 are arranged coaxially with the container axis O of the container body 2. Hereinafter, the side of the cap member 15 is referred to as upward and the side of the container body 2 is referred to as downward along the container axis O, and the direction along the container axis O is referred to as the vertical direction. Further, in a plan view seen from the vertical direction, the direction intersecting the container axis O is referred to as the radial direction, and the direction of orbiting around the container axis O is referred to as the circumferential direction. Note that the posture in which the mouth portion 3 of the container body 2 faces upward is referred to as the upright posture, and the posture in which the mouth portion 3 of the container body 2 faces downward is referred to as the inverted posture. Hereinafter, the configuration of the dispenser 1 will be described in the upright posture.

[0025] (Container body) First, the container body 2 to which the dispenser 1 is combined will be briefly described. The container body 2 is formed in a bottomed cylindrical shape in which a mouth portion 3, a shoulder portion 4, a body portion 5, and a bottom portion (not shown) are successively connected from above. An annular neck ring 6 protruding outward in the radial direction is formed at the mouth portion 3 of the container body 2. Further, a male screw portion 7 is formed on the outer peripheral surface of the portion of the mouth portion 3 of the container body 2 that is located above the neck ring 6. Note that the neck ring 6 is not essential and may not be provided.

[0026] (Pump mechanism) The pump mechanism 10 includes a mounting cap 20 mounted on the mouth portion 3 of the container body 2, a cylinder 30 in which a first inflow hole 31 for allowing the content W to flow in is formed, a stem 40 that is arranged to be movable downward in an upwardly biased state with respect to the cylinder 30 and whose interior communicates with the inside of the cylinder 30 and the discharge hole 11, a piston 50 that is slidably fitted up and down in the cylinder 30 and operates in conjunction with the vertical movement of the stem 40, a check valve 60 provided in the cylinder 30, and a cylinder cover 70 that covers the cylinder 30 from the outside in the radial direction and from below.

[0027] (Mounting cap) The mounting cap 20 includes a mounting cylinder 21 that surrounds the mouth portion 3 of the container body 2 from the outside in the radial direction, an annular cap top wall 22 that projects radially inward from the upper end portion of the mounting cylinder 21, and a guide cylinder 23 that extends upward from the cap top wall 22.

[0028] On the inner peripheral surface of the mounting cylinder 21, a female screw portion 24 that engages with the male screw portion 7 formed on the mouth portion 3 of the container body 2 is formed. Thereby, the mounting cap 20 is mounted on the mouth portion 3 of the container body 2 by screwing by screw connection between the male screw portion 7 and the female screw portion 24. However, the mounting method of the mounting cap 20 is not limited to screwing, and for example, it may be mounted on the mouth portion 3 of the container body 2 by undercut fitting.

[0029] The guide cylinder 23 is integrally formed so as to extend upward from the cap top wall 22 and serves to guide the movement (vertical movement) of the cap member 15. The guide cylinder 23 is formed in a cylindrical shape smaller than the outer diameter of the mounting cylinder 21, for example. Note that the guide cylinder 23 does not have to be integrally formed with the mounting cap 20, and it may be formed separately and then combined with the mounting cap 20.

[0030] On the inner peripheral surface of the guide cylinder 23, a guide groove 25 that is recessed radially outward and extends in the vertical direction is formed. The guide groove 25 opens upward and a plurality of guide grooves 25 are formed at intervals in the circumferential direction.

[0031] (Cylinder) The cylinder 30 is formed in a bottomed cylindrical shape having a cylinder peripheral wall 32 and a bottom wall portion. An annular flange portion 33 that projects radially outward is formed at the upper end portion of the cylinder peripheral wall 32. The flange portion 33 is disposed on the upper end opening edge of the mouth portion 3 of the container body 2 via a packing and is sandwiched vertically between the cap top wall 22 of the mounting cap 20 and the upper end opening edge of the mouth portion 3. As a result, the cylinder 30 is mounted inside the mouth portion 3 of the container body 2. Note that the cylinder 30 extends downward from the mouth portion 3 of the container body 2 and enters the inside of the container body 2. The cylinder peripheral wall 32 is open upward.

[0032] A first outside air introduction hole 34 that penetrates the cylinder peripheral wall 32 in the radial direction is formed in the cylinder peripheral wall 32. The first outside air introduction hole 34 serves to guide the outside air introduced from the outside of the ejector 1 to an outside air introduction passage 81 described later. The first outside air introduction hole 34 is formed in a portion of the cylinder peripheral wall 32 that can be blocked by the piston 50 when the piston 50 is in the uppermost position shown in FIG. 1. Therefore, the first outside air introduction hole 34 is blocked when the piston 50 is in the uppermost position and is opened when the piston 50 moves downward from the uppermost position. In the illustrated example, the first outside air introduction hole 34 is formed at one location in the cylinder peripheral wall 32.

[0033] A first inflow hole 31 that penetrates the bottom wall portion located at the lower end of the cylinder 30 in the vertical direction is formed in the bottom wall portion. The first inflow hole 31 is formed, for example, in a circular shape in plan view. Further, an engaging cylinder 35 that protrudes downward is formed in the bottom wall portion of the cylinder 30. The inside of the engaging cylinder 35 communicates with the first inflow hole 31.

[0034] (Check valve) The check valve 60 is provided in the cylinder 30 configured as described above and freely opens and closes the first inflow hole 31. The check valve 60 includes a toped cylindrical fitting member 61, a valve body 62, and an elastically deformable elastic arm 63. The fitting member 61 is fitted inside the circumferential wall 32 of the cylinder. A communication hole (not shown) that penetrates the top wall of the fitting member 61 vertically is formed in the top wall. Thereby, the content W from the first inflow hole 31 can be moved into the cylinder 30 through the communication hole. However, the fitting member 61 does not necessarily have to be formed in a toped cylindrical shape, and may be formed in a ring shape that fits inside the circumferential wall 32 of the cylinder, for example.

[0035] The elastic arms 63 integrally connect the valve body 62 and the cylindrical portion of the fitting member 61, and a plurality of them are formed at intervals in the circumferential direction, for example. The elastic arms 63 are formed to extend in the circumferential direction, for example, so as to ensure appropriate springiness. The inner ends are connected to the outer edge of the valve body 62, and the outer ends are connected to the cylindrical portion of the fitting member 61. Therefore, the valve body 62 can be elastically displaced in the vertical direction as the plurality of elastic arms 63 elastically deform.

[0036] The check valve 60 configured in this way allows the movement of the content W from the inside of the container body 2 into the cylinder 30 through the first inflow hole 31 using the valve body 62, and restricts the movement of the content W from the inside of the cylinder 30 into the container body 2 through the first inflow hole 31. In this embodiment, a multi-point valve (for example, a three-point valve) is described as an example of the check valve 60, but it is not limited to this case, and other known valve structures may be adopted.

[0037] (Cylinder cover) The cylinder cover 70 is formed in a bottomed cylindrical shape and is mounted so as to cover the cylinder 30 from the outside in the radial direction and downward. Specifically, the cylinder cover 70 is formed in a bottomed cylindrical shape that covers the circumferential wall 32 of the cylinder and the engaging cylinder 35 from the outside in the radial direction and covers the lower end opening of the engaging cylinder 35 from below. The cylinder cover 70 is integrally combined with the cylinder 30 mainly by fitting to the circumferential wall 32 of the cylinder and the engaging cylinder 35. In the illustrated example, the cylinder cover 70 enters the gap between the cylinder peripheral wall 32 and the mouth portion 3 of the container body 2, thereby covering substantially the entire length of the cylinder peripheral wall 32 from the radially outer side.

[0038] The cylinder cover 70 is formed with a second inflow hole 71 and a second outside air introduction hole 72 that communicate with the inside of the container body 2. The second inflow hole 71 is formed at the connecting portion between the portion of the cylinder cover 70 that covers the cylinder peripheral wall 32 from the radially outer side and the portion that covers the engaging cylinder 35 from the radially outer side, and is formed so as to penetrate the cylinder cover 70 in the radial direction. In particular, the second inflow hole 71 is located below the mouth portion 3 of the container body 2. Thereby, for example, when the container body 2 is in an inverted posture, it is easy to introduce the content W in the container body 2 into the second inflow hole 71. Furthermore, in the illustrated example, the second inflow hole 71 is disposed on the radially opposite side of the first outside air introduction hole 34 formed in the cylinder 30 with respect to the container axis O.

[0039] On the other hand, the second outside air introduction hole 72 is disposed at the upper end portion of the cylinder cover 70. In the illustrated example, the upper end opening of the cylinder cover 70 functions as the second outside air introduction hole 72. In particular, the upper end opening edge of the cylinder cover 70 is disposed below the packing with a gap with respect to the packing disposed between the flange portion 33 of the cylinder 30 and the upper end opening edge of the mouth portion 3 of the container body 2. Therefore, the second outside air introduction hole 72, which is the upper end opening of the cylinder cover 70, communicates with the inside of the container body 2 through the above gap.

[0040] In particular, the second outside air introduction hole 72 is disposed above the first outside air introduction hole 34 formed in the cylinder 30. Note that the second outside air introduction hole 72 does not necessarily have to be the upper end opening of the cylinder cover 70. For example, a through hole may be formed in a portion of the cylinder cover 70 that is located above the first outside air introduction hole 34 so as to penetrate the cylinder cover 70 in the radial direction, and this through hole may function as the second outside air introduction hole 72.

[0041] Between the cylinder cover 70 and the cylinder 30 configured as described above, there are provided an inflow passage 80 that connects the first inflow hole 31 and the second inflow hole 71 and guides the content W into the cylinder 30, an outside air introduction passage 81 that connects the first outside air introduction hole 34 and the second outside air introduction hole 72 and guides outside air into the container body 2, and an airtight portion 82 that blocks communication between the inflow passage 80 and the outside air introduction passage 81.

[0042] As shown in FIGS. 1 and 2, on the inner peripheral surface of the cylinder cover 70, a concave inflow groove 73 that connects the first inflow hole 31 and the second inflow hole 71 is formed. The inflow groove 73 extends upward from the bottom wall portion of the cylinder cover 70 and then extends radially outward to communicate with the second inflow hole 71. Thereby, an inflow passage 80 that connects the first inflow hole 31 and the second inflow hole 71 through the inflow groove 73 is provided between the outer peripheral surface of the cylinder 30 and the inner peripheral surface of the cylinder cover 70. Note that the inflow passage 80 is formed in an arc shape that extends along the circumferential direction in a plan view (a cross-sectional view perpendicular to the container axis O). Also, like the second inflow hole 71, the inflow passage 80 is disposed on the radially opposite side of the first outside air introduction hole 34 formed in the cylinder 30 with respect to the container axis O.

[0043] As shown in FIGS. 1 and 3, a circular gap is formed over the entire circumference of the cylinder cover 70 and the cylinder 30 in a portion above the airtight portion 82, which will be described later, between the inner peripheral surface of the cylinder cover 70 and the outer peripheral surface of the cylinder 30. This circular gap serves as the outside air introduction passage 81. Thereby, the first outside air introduction hole 34 and the second outside air introduction hole 72 communicate with each other through the outside air introduction passage 81.

[0044] Furthermore, as shown in FIGS. 3 and 4, on the inner peripheral surface of the cylinder cover 70, an arc-shaped seal portion 75 that protrudes radially inward, contacts the outer peripheral surface of the cylinder 30, and extends along the circumferential direction is formed. In the illustrated example, the seal portion 75 is formed at the upper end portion of the cylinder cover 70 and is formed to protrude in a semi-circular shape in a longitudinal cross-sectional view, and is in close contact with the outer peripheral surface of the cylinder 30. And, between the outer peripheral surface of the cylinder 30 and the inner peripheral surface of the cylinder cover 70, a non-formed portion of the seal portion 75 is a communication portion 83 that communicates with the outside air introduction passage 81 and extends along the circumferential direction. In particular, the length of the communication portion 83 along the circumferential direction is formed shorter than the length of the seal portion 75 along the circumferential direction. Thereby, the first outside air introduction hole 34 and the second outside air introduction hole 72 communicate with each other through the outside air introduction passage 81 while passing through a narrow range of the communication portion 83.

[0045] The communication portion 83 is formed such that an intermediate portion in the circumferential direction of the communication portion 83 is located above the first outside air introduction hole 34 formed in the cylinder 30 in a plan view. However, it is sufficient that the formation range of the communication portion 83 is located above the first outside air introduction hole 34 in a plan view. Therefore, the communication portion 83 is arranged on the radially opposite side of the second inflow hole 71 shown in FIG. 1 with respect to the container axis O. Similarly, the communication portion 83 is arranged on the radially opposite side of the inflow passage 80 with respect to the container axis O. Therefore, the communication portion 83 and the inflow passage 80 are arranged such that their circumferential positions are different from each other. Note that the communication portion 83, the second inflow hole 71, and the inflow passage 80 may be arranged such that their circumferential positions are different from each other. For example, it is not necessary that the communication portion 83, the second inflow hole 71, and the inflow passage 80 are arranged on the radially opposite sides with respect to the container axis O. Furthermore, the communication portion 83 may have a circumferential width (length along the circumferential direction) that allows the outside air to pass through. For example, it may have a circumferential width equal to or less than the diameter of the first outside air introduction hole 34.

[0046] As shown in FIG. 3, in an upper end portion of the cylinder cover 70, a through groove 74 that penetrates the cylinder cover 70 in the radial direction and opens upward is formed in a portion located above the communication portion 83. Therefore, this through groove 74 may function as, for example, a second outside air introduction hole. However, in the present embodiment, the through groove 74 is not essential and may not be provided.

[0047] As shown in FIG. 1, the airtight portion 82 airtightly seals the outer peripheral surface of the cylinder 30 and the inner peripheral surface of the cylinder cover 70 over the entire circumference so as to vertically divide the inflow passage 80 and the outside air introduction passage 81. In the illustrated example, the airtight portion 82 is located above the inflow passage 80 and airtightly seals the outer peripheral surface of the cylinder 30 and the inner peripheral surface of the cylinder cover 70 at a position radially outside the check valve 60. More specifically, the airtight portion 82 is configured by closely contacting an annular seal portion formed to protrude radially inward from the inner peripheral surface of the cylinder cover 70 with respect to the outer peripheral surface of the cylinder 30.

[0048] (Stem) As shown in FIG. 1, the stem 40 is coaxially arranged with the container axis O inside the mouth portion 3 of the container body 2. In the state before use of the ejector 1, the upper end portion of the stem 40 protrudes above the guide cylinder 23 of the mounting cap 20, and the lower end portion is arranged to be accommodated in the cylinder 30. The upper end portion of the stem 40 is fitted to the lower end portion of a nozzle cylinder 123 (to be described later) of the cap member 15. Thereby, the stem 40 and the cap member 15 are integrally combined. Therefore, the stem 40 is configured to be vertically movable with respect to the cylinder 30 in a state where the inside communicates with the cylinder 30 in accordance with the vertical movement (relative movement) of the cap member 15 with respect to the pump mechanism 10.

[0049] A cylindrical pressing member 91 that presses an urging member 90 such as a coil spring from above is fitted to the outer peripheral surface of the upper end portion of the stem 40. Therefore, the pressing member 91 is integrally combined with the stem 40 and is configured to be vertically movable together with the stem 40. The lower end portion of the stem 40 is a diameter-expanded cylinder 41 having an expanded diameter radially outward. Thereby, the entire stem 40 is formed in a two-stage cylindrical shape with an outer diameter that changes in the vertical direction.

[0050] The stem 40 configured as described above is vertically movably supported by a cylindrical support member 100 fitted inside the upper end portion of the cylinder peripheral wall 32. The support member 100 has a flange portion 101 that protrudes radially outward and contacts the flange portion 33 of the cylinder 30 from above. This flange portion 101 is sandwiched vertically between the flange portion 33 of the cylinder 30 and the cap top wall 22 of the mounting cap 20. Thereby, the entire support member 100 is combined with the cylinder 30 in a vertically positioned state.

[0051] The stem 40 is inserted into the inside of the support member 100 so as to be vertically slidable. The support member 100 is formed to correspond to the shape of the enlarged diameter cylinder 41 of the stem 40, and restricts the stem 40 from coming out above the support member 100. Therefore, the stem 40 is restricted from moving upward any further by the support member 100.

[0052] An urging member 90 is disposed coaxially with the container axis O between the support member 100 and the pressing member 91. The urging member 90 is disposed so as to surround the stem 40 from the outside in the radial direction, the lower end portion contacts the support member 100 from above, and the upper end portion contacts the pressing member 91 from below. Thereby, the urging member 90 urges the stem 40 upward via the pressing member 91 using its elastic restoring force.

[0053] A minute gap is formed between the support member 100 and the stem 40 to allow outside air outside the ejector 1 to be introduced into the cylinder 30. Thereby, it is possible to introduce outside air from the outside into the first outside air introduction hole 34 formed in the cylinder 30.

[0054] Furthermore, a piston guide 110 for holding the piston 50 with respect to the stem 40 is combined with the stem 40. The piston guide 110 is formed in a bottomed cylindrical shape and is disposed coaxially with the container axis O in a state of being disposed below the stem 40. The upper end portion of the piston guide 110 is fitted inside the stem 40. Thereby, the piston guide 110 is enabled to move up and down together with the stem 40. On the peripheral wall of the piston guide 110, through holes 111 that penetrate the peripheral wall in the radial direction are formed. The through holes 111 are formed vertically and a plurality of them are formed at intervals in the circumferential direction. On the outer peripheral surface on the bottom wall portion side of the piston guide 110, an annular holding cylinder 112 arranged coaxially with the container axis O is formed.

[0055] The interior of the piston guide 110 configured in this way communicates with the interior of the stem 40. Therefore, the interior of the stem 40 communicates with the interior of the cylinder 30 through the interior of the piston guide 110 and the through holes 111.

[0056] (Piston) The piston 50 is disposed between the holding cylinder 112 of the piston guide 110 and the lower end opening edge of the enlarged diameter cylinder 41 in the stem 40. The piston 50 is fitted to be vertically slidable on the inner peripheral surface of the enlarged diameter cylinder 41 and is also fitted to be vertically slidable on the inner peripheral surface of the cylinder peripheral wall 32. Thereby, the piston 50 operates in linkage with the vertical movement of the stem 40. Note that the piston 50 is located at the uppermost position in the state before use of the ejector 1. The piston 50 located at the uppermost position is positioned by contacting the support member 100 from below and closes the first outside air introduction hole 34.

[0057] The piston 50 of the present embodiment is capable of relative movement in the vertical direction with respect to the stem 40 and the piston guide 110. And when the holding cylinder 112 of the piston guide 110 contacts the piston 50 from below, it is possible to regulate the movement of the content W from the cylinder 30 into the stem 40. On the other hand, when the piston 50 and the holding cylinder 112 of the piston guide 110 are separated and the enlarged diameter cylinder 41 of the stem 40 contacts the piston 50 (see FIG. 5), it is possible to allow the movement of the content W from the cylinder 30 into the stem 40.

[0058] (Cap member) The cap member 15 is configured to be vertically movable with respect to the pump mechanism 10. In addition to serving as an operating member that presses down the stem 40 against the cylinder 30, the cap member 15 also functions as an adapter that can be detachably attached to the mouth portion 131 of another container body 130 (see FIG. 5). Thus, the content W in the container body 2 can be discharged into the interior of another container body 130.

[0059] The cap member 15 includes a bottomed cylindrical cap cylinder 120 that opens upward. The cap cylinder 120 is arranged coaxially with the container axis O in a state where it is disposed above the guide cylinder 23 of the mounting cap 20. On the inner peripheral surface of the cap cylinder 120, there is formed an internal thread portion 121 that engages with an external thread portion 132 (see FIG. 5) formed on the mouth portion 131 of another container body 130. However, the internal thread portion 121 is not essential and may not be provided. Particularly, when the mouth portion 131 of another container body 130 does not have an external thread portion 132 or the like, the internal thread portion 121 is unnecessary. Furthermore, on a portion of the inner peripheral surface of the cap cylinder 120 that is located below the internal thread portion 121, there are formed vertical ribs 122 that project radially inward and extend in the vertical direction. A plurality of the vertical ribs 122 are formed at intervals in the circumferential direction.

[0060] On the bottom wall portion of the cap cylinder 120, there is formed a nozzle cylinder 123 that penetrates the bottom wall portion vertically. The nozzle cylinder 123 is arranged coaxially with the container axis O and is formed such that the bottom wall portion of the cap cylinder 120 is integrally connected to the outer peripheral surface of the middle portion. At the upper end portion of the nozzle cylinder 123, a discharge hole 11 for discharging the content W is formed. The lower end portion of the nozzle cylinder 123 is fitted inside the upper end portion of the stem 40. Thus, the interior of the stem 40 communicates with the discharge hole 11. Furthermore, the upper opening edge of the stem 40 and the upper surface of the pressing member 91 are in contact with the lower surface of the bottom wall portion of the cap cylinder 120.

[0061] As a result, the entire cap member 15 is integrally combined with the stem 40, and it is possible to move the stem 40 downward along with the pressing-down operation. Further, due to the upward biasing of the stem 40 by the biasing member 90, it is possible to move the cap member 15 upward together with the stem 40.

[0062] Furthermore, on the bottom wall portion of the cap cylinder 120, a surrounding cylinder 124 is formed which protrudes downward and surrounds the nozzle cylinder 123 from the outside in the radial direction. The surrounding cylinder 124 is disposed inside the guide cylinder 23 of the mounting cap 20. On the outer peripheral surface of the lower end portion of the surrounding cylinder 124, slide protrusions 125 are formed which protrude outward in the radial direction. A plurality of slide protrusions 125 are formed at intervals in the circumferential direction corresponding to the guide grooves 25, and are slidably fitted in the guide grooves 25 in the vertical direction. Thereby, the cap member 15 is stably movable up and down while being guided along the guide grooves 25 in a state where it cannot rotate relative to the container axis O.

[0063] (Operation of the ejector) Next, a case of discharging the content W using the ejector 1 configured as described above will be described. In the following description, as shown in FIG. 5, a case of discharging the content W in a state where the container body 2 and the ejector 1 are in an inverted posture such that the mouth portion 3 and the discharge hole 11 of the container body 2 face downward will be described as an example. Further, a case of attaching the cap member 15 to the mouth portion 131 of another container body 130 and discharging the content W into the other container body 130 will be described as an example. In the illustrated example, since the cap member 15 is screwed onto the mouth portion 131 of another container body 130, the ejector 1 can be set in an inverted posture state in a more stable posture.

[0064] As an initial state, as shown in FIG. 5, it is assumed that the content W in the container body 2 is stored in the cylinder 30. Further, it is assumed that the content W is supplied up to the inside of the engagement cylinder 35 through the second inflow hole 71 and the inflow path 80.

[0065] When discharging the content W, the container body 2 and the cap member 15 are relatively moved in the vertical direction to relatively move the cap member 15 with respect to the pump mechanism 10. Specifically, by operating so as to push the container body 2 toward another container body 130, the cap member 15 can be relatively moved toward the container body 2 side. At this time, using the guide cylinder 23 of the mounting cap 20, the cap member 15 can be moved while maintaining a stable posture.

[0066] Thereby, while elastically deforming the biasing member 90, the position of the piston 50 can be kept as it is, and the stem 40 and the piston guide 110 can be moved toward the inside of the cylinder 30. Therefore, a gap can be formed between the holding cylinder 112 of the piston guide 110 and the piston 50, and the lower end edge of the enlarged diameter cylinder 41 of the stem 40 can be brought into contact with the piston 50 in the vertical direction. Then, by further moving the stem 40 and the piston guide 110, as shown in FIG. 6, the piston 50 can be moved from the uppermost position toward the inside of the cylinder 30 while maintaining a state where a gap is provided between the holding cylinder 112 and the piston 50. Therefore, the inside of the cylinder 30 can be pressurized while keeping the check valve 60 closed, and the content W in the cylinder 30 can be supplied to the discharge hole 11 through the piston guide 110 and the stem 40.

[0067] Therefore, the content W can be discharged through the discharge hole 11. Therefore, various usage methods (for example, two-liquid mixing, etc.) such as mixing the discharged content W with the content accommodated in another container body 130 can be performed. Note that when discharging the content W, as shown in FIG. 6, the first outside air introduction hole 34 is opened when the piston 50 moves from the uppermost position.

[0068] After the content W is discharged, when the pushing operation of the container body 2 is released and the movement of the cap member 15 with respect to the pump mechanism 10 is released, the elastic restoring force of the biasing member 90 is utilized to move the cylinder 30, the container body 2, etc. in a direction away from another container body 130. Therefore, the stem 40 and the piston guide 110 can be relatively moved with respect to the cylinder 30 from the inside of the cylinder 30 toward the cap member 15 side.

[0069] Therefore, the holding cylinder 112 of the piston guide 110 can be brought into contact with the piston 50 in the vertical direction, and thereafter, the piston 50 can be moved together with the stem 40 and the piston guide 110. Accordingly, the inside of the cylinder 30 can be depressurized (made negative pressure), and the check valve 60 can be opened. Thereby, the content W in the container body 2 can be supplied into the cylinder 30 through the second inflow hole 71, the inflow path 80, and the first inflow hole 31, and can be prepared for the next discharge.

[0070] Furthermore, due to the movement of the content W from the inside of the container body 2 into the cylinder 30, the inside of the container body 2 is depressurized (made negative pressure). Thereby, outside air from the outside can be supplied into the container body 2 through the first outside air introduction hole 34, the outside air introduction path 81, and the second outside air introduction hole 72. Therefore, air replacement inside the container body 2 can be performed, and the depressurization inside the container body 2 can be eliminated. Note that the first outside air introduction hole 34 is closed when the piston 50 moves back to the uppermost position.

[0071] Particularly according to the ejector 1 of the present embodiment, since the cylinder cover 70 covering the cylinder 30 is provided, as shown in FIG. 5, even when used in an inverted posture such that the mouth portion 3 of the container body 2 faces downward, the content W in the container body 2 hardly reaches the first outside air introduction hole 34 via the second outside air introduction hole 72 and the outside air introduction path 81. In particular, since the outside air introduction path 81 is formed in a narrow gap between the outer peripheral surface of the cylinder 30 and the inner peripheral surface of the cylinder cover 70, this also contributes to the fact that the content W in the container body 2 hardly reaches the first outside air introduction hole 34. Moreover, when the piston 50 is located at the uppermost position, the first outside air introduction hole 34 is blocked. Therefore, it is possible to suppress the leakage of the content W in the container body 2 to the outside through the first outside air introduction hole 34.

[0072] Furthermore, the airtight portion 82 divides the inflow passage 80 and the outside air introduction passage 81, and blocks their communication with each other. Therefore, for example, if the outside air in the outside air introduction passage 81 flows into the cylinder 30 through the inflow passage 80, it can prevent problems such as ejection failure, or problems such as the content W in the inflow passage 80 leaking to the outside through the outside air introduction passage 81 and the first outside air introduction hole 34.

[0073] As described above, according to the ejector 1 of the present embodiment, the air replacement in the container body 2 can be appropriately performed, and the leakage of the content W through the first outside air introduction hole 34 can be suppressed. Therefore, it can be suitably used for the container body 2 which is a non-delamination container, and the ejector 1 can be made applicable to various uses.

[0074] Furthermore, in the ejector 1 of the present embodiment, as shown in FIG. 1, by arranging the outside air introduction passage 81 above the inflow passage 80, the outside air introduction passage 81 is arranged at a position close to the first outside air introduction hole 34 which is blocked when the piston 50 is located at the uppermost position. Therefore, the flow path length of the outside air introduction passage 81 can be shortened, and the outside air can be introduced into the container body 2 with less resistance through the first outside air introduction hole 34, the outside air introduction passage 81, and the second outside air introduction hole 72. Therefore, it is easy to perform air replacement efficiently. Furthermore, the airtight portion 82 hermetically seals the outer peripheral surface of the cylinder 30 and the inner peripheral surface of the cylinder cover 70 over the entire circumference so as to vertically divide the inflow passage 80 and the outside air introduction passage 81. Therefore, the communication between the inflow passage 80 and the outside air introduction passage 81 can be more reliably blocked.

[0075] Furthermore, since the second outside air introduction hole 72 is disposed above the first outside air introduction hole 34, when the container body 2 is used in an inverted posture such that the mouth portion 3 of the container body 2 faces downward as shown in FIG. 5, the content W in the container body 2 becomes less likely to reach the first outside air introduction hole 34 via the outside air introduction path 81 against its own weight from the second outside air introduction hole 72.

[0076] Moreover, as shown in FIGS. 3 and 4, an arcuate communication portion 83 communicating with the outside air introduction path 81 is formed between the outer peripheral surface of the cylinder 30 and the inner peripheral surface of the cylinder cover 70 by utilizing an arcuate seal portion 75 formed on the inner peripheral surface of the cylinder cover 70. Thereby, the inside of the container body 2 and the first outside air introduction hole 34 are communicated with each other via a narrow range of the communication portion 83. Therefore, it is possible to further suppress the content W in the container body 2 from reaching the first outside air introduction hole 34.

[0077] Furthermore, the arcuate communication portion 83 in a plan view shown in FIG. 4 and the arcuate inflow path 80 in a plan view shown in FIGS. 1 and 2 are arranged such that their circumferential positions are different from each other. Therefore, when the container body 2 is used in an inverted posture such that the mouth portion 3 of the container body 2 faces downward as shown in FIG. 5, the flow of the outside air can be suppressed so that the outside air introduced into the outside air introduction path 81 from the first outside air introduction hole 34 passes through the communication portion 83 and moves (rises) vertically toward the inflow path 80 side. Therefore, it is possible to suppress the inconvenience that the outside air flows into the cylinder 30 via the inflow path 80, and the operating performance of the ejector 1 can be ensured.

[0078] (Modification of the First Embodiment) In the above-described first embodiment, it is preferable to form a narrow gap between the mouth portion 3 of the container body 2 shown in FIG. 1 and the cylinder cover 70. For example, a constricted portion protruding radially inward may be provided at a portion of the mouth portion 3 of the container body 2 that is located below or above the neck ring 6 to narrow the gap with the cylinder cover 70. In this case, as shown in FIG. 5, when the container body 2 is in an inverted posture with the mouth portion 3 facing downward, it is possible to make it difficult for the content W in the container body 2 to enter the gap between the mouth portion 3 of the container body 2 and the cylinder cover 70. Therefore, the content W in the container body 2 can be more actively caused to flow into the second inflow hole 71. As a result, it is possible to use up the content W with a small remaining amount. Furthermore, since it is possible to make it difficult for the content W to reach the second outside air introduction hole 72, the possibility of leakage of the content W to the outside through the outside air introduction path 81 and the first outside air introduction hole 34 can be further reduced.

[0079] Also, in the above-described first embodiment, the case where the seal portion 75 is formed at the upper end portion of the cylinder cover 70 has been described as an example. However, for example, the seal portion 75 having an arcuate shape in plan view may be formed so as to extend downward to such an extent that it reaches the first outside air introduction hole 34. In this case, the communication portion 83 having an arcuate shape in plan view can be formed in a vertically long shape.

[0080] Furthermore, in the first embodiment, the case where the outside air introduction path 81 is formed in an annular shape between the cylinder 30 and the cylinder cover 70 has been described as an example. However, for example, the outside air introduction path 81 itself may be formed in an arcuate shape extending in the circumferential direction in plan view. In this case, for example, an outside air introduction groove that extends in the circumferential direction and also extends in the vertical direction may be formed on the inner peripheral surface of the cylinder cover 70, and the inside of the outside air introduction groove may be made to function as the outside air introduction path.

[0081] Furthermore, as shown in FIG. 7, the second inflow hole 71 may be formed in the cylinder cover 70 so as to be located above the connecting portion rather than at the connecting portion between the portion of the cylinder cover 70 that covers the cylinder peripheral wall 32 from the outside in the radial direction and the portion that covers the engaging cylinder 35 from the outside in the radial direction as in the first embodiment. In the illustrated example, the second inflow hole 71 is formed in the portion of the cylinder cover 70 that covers the cylinder peripheral wall 32 from the outside in the radial direction. Further, the inflow groove 73 extends upward from the bottom wall portion of the cylinder cover 70, then extends radially outward, and communicates with an annular gap formed between the cylinder peripheral wall 32 and the cylinder cover 70. Thereby, the inflow groove 73 communicates with the second inflow hole 71. Furthermore, the airtight portion 82 is formed above the second inflow hole 71. Therefore, the airtight portion 82 airtightly seals the outside air introduction passage 81 and the inflow groove 73 so as to vertically divide them.

[0082] In the case of the ejector 1 configured as described above, in addition to being able to achieve the same operational effects as those of the first embodiment, since the second inflow hole 71 is disposed upward, the remaining amount can be further reduced and the content W can be used up more completely.

[0083] (Second Embodiment) Next, a second embodiment of the ejector according to the present invention will be described with reference to the drawings. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and their descriptions are omitted.

[0084] As shown in FIGS. 8 and 9, the ejector 150 of the present embodiment includes a positioning member 151 that positions the cylinder cover 70 in the circumferential direction with respect to the cylinder 30 between the cylinder 30 and the cylinder cover 70. Specifically, on the outer peripheral surface of the engaging cylinder 35 in the cylinder 30, positioning ribs 152 that project radially outward and extend in the vertical direction are formed. Two positioning ribs 152 are formed at intervals in the circumferential direction and are housed in the inflow groove 73 formed in the cylinder cover 70. The two positioning ribs 152 are arranged at intervals corresponding to the circumferential width of the inflow groove 73 and can be respectively close to or in contact with the circumferential walls 73a facing each other in the circumferential direction of the inner wall of the inflow groove 73.

[0085] Therefore, by combining the cylinder cover 70 with the cylinder 30 so as to accommodate the two positioning ribs 152 in the inflow groove 73, it is possible to combine them in a circumferentially positioned state. Therefore, the positioning rib 152 and the inflow groove 73 function as a positioning member 151.

[0086] As shown in FIGS. 8 and 10, a plurality of convex ribs 155 that protrude radially inward and extend in the vertical direction are formed on a portion of the inner peripheral surface of the cylinder cover 70 that is located above the airtight portion 82. A plurality of convex ribs 155 are formed at equal intervals in the circumferential direction. The convex ribs 155 are formed to protrude in a semicircular shape in plan view and are in close contact with the outer peripheral surface of the cylinder 30. As a result, the gaps between adjacent convex ribs 155 in the circumferential direction are partitioned in a non-communicating state with each other in the circumferential direction. And one of the gaps between adjacent convex ribs 155 in the circumferential direction communicates with the first outside air introduction hole 34. Therefore, one of the gaps between adjacent convex ribs 155 in the circumferential direction functions as an outside air introduction path 81 that communicates the first outside air introduction hole 34 and the second outside air introduction hole 72.

[0087] (Operation of the ejector) Even when the content W is ejected using the ejector 150 of the present embodiment configured as described above, the same operational effects as those of the first embodiment can be achieved. Particularly in the case of the present embodiment, the cylinder 30 and the cylinder cover 70 can be combined in a circumferentially positioned state using the positioning member 151 (positioning rib 152, inflow groove 73). Therefore, the cylinder 30 and the cylinder cover 70 can be appropriately combined so that the first outside air introduction hole 34 formed in the cylinder 30 and the second inflow hole 71 formed in the cylinder cover 70 are located on opposite sides in the radial direction. Furthermore, it is possible to prevent an unintentional circumferential displacement between the cylinder 30 and the cylinder cover 70 during use or the like.

[0088] As described above, the embodiments of the present invention have been explained. However, these embodiments are presented as examples and are not intended to limit the scope of the invention. The embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. The embodiments 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 the equivalent range.

[0089] For example, in each of the above embodiments, the case where the cap member 15 is configured to be vertically movable with respect to the pump mechanism 10 has been described as an example. However, it is not limited to this case, and any configuration that allows relative movement is acceptable. For example, the cap member 15 may be configured to be relatively rotatable about the container axis O with respect to the pump mechanism 10, and the stem 40 may be moved downward with respect to the cylinder 30 by the relative rotation of the pump mechanism 10 and the cap member 15.

[0090] Furthermore, in each of the above embodiments, the case where the discharge hole 11 is formed in the nozzle cylinder 123 of the cap member 15 and the interior of the stem 40 is communicated with the discharge hole 11 by integrally combining the nozzle cylinder 123 and the stem 40 has been described as an example. However, it is not limited to this case. For example, the discharge hole 11 may be formed at the upper end of the stem 40. Even in this case, for example, the cap member 15 and the stem 40 may be integrally combined and configured to move up and down in conjunction with each other.

[0091] Furthermore, in each of the above embodiments, the second inflow hole 71 and the inflow path 80 only need to communicate with each other. For example, the opening position of the second inflow hole 71 does not have to be located at the center in the circumferential direction of the inflow path 80.

[0092] Furthermore, the positioning member 151 in the second embodiment may be applied to the first embodiment. Even in this case, the cylinder 30 and the cylinder cover 70 can be appropriately combined so that the first outside air introduction hole 34 formed in the cylinder 30 and the second inflow hole 71 formed in the cylinder cover 70 are located on opposite sides in the radial direction. Furthermore, the cylinder 30 and the cylinder cover 70 can be combined so that the communication portion 83 and the inflow passage 80 are located at different positions in the circumferential direction.

Explanation of Signs

[0093] O…Container axis 1, 150…Dispenser 2…Container body 3…Mouth portion of the container body 10…Pump mechanism 11…Discharge hole 30…Cylinder 31…First inflow hole 34…First outside air introduction hole 40…Stem 50…Piston 60…Check valve 70…Cylinder cover 71…Second inflow hole 72…Second outside air introduction hole 75…Sealing portion 80…Inflow passage 81…Outside air introduction passage 82…Airtight portion 83…Communication portion 151…Positioning member

Claims

1. A pump mechanism is attached to the mouth of a container body for accommodating contents and has a discharge hole for discharging the contents. The pump mechanism includes: a cylinder having a first inflow hole formed at a lower end for allowing the contents to flow into the interior; a stem that is disposed so as to be movable downward in an upwardly biased state with respect to the cylinder, and whose interior communicates with the interior of the cylinder and the discharge hole; a piston that is fitted into the cylinder so as to be slidable up and down and operates in conjunction with the vertical movement of the stem; a check valve provided in the cylinder that allows the movement of the contents from the interior of the container body into the cylinder through the first inflow hole and suppresses the movement of the contents from the cylinder into the container body through the first inflow hole; a bottomed cylindrical cylinder cover that covers the cylinder from the radially outer side and below; a first outside air introduction hole for introducing outside air is formed in the cylinder; a second inflow hole and a second outside air introduction hole that communicate with the interior of the container body are formed in the cylinder cover; Between the cylinder and the cylinder cover, an inflow path that communicates the first inflow hole and the second inflow hole and guides the contents into the cylinder, an outside air introduction path that communicates the first outside air introduction hole and the second outside air introduction hole and guides outside air into the container body, and an airtight portion that blocks the communication between the inflow path and the outside air introduction path are formed; The first outside air introduction hole is closed when the piston is in the uppermost position and is opened when the piston moves downward from the uppermost position. A discharger characterized by this.

2. In the discharger according to Claim 1, The outside air introduction path is disposed above the inflow path. The airtight portion airtightly seals the outer peripheral surface of the cylinder and the inner peripheral surface of the cylinder cover over the entire circumference so as to vertically separate the inflow path and the outside air introduction path. A discharger.

3. In the discharger according to Claim 2, The second outside air introduction hole is disposed in a portion of the cylinder cover that is located above the first outside air introduction hole. On the inner peripheral surface of the cylinder cover, an arc-shaped seal portion is formed that projects radially inward, contacts the outer peripheral surface of the cylinder, and extends along the circumferential direction that circulates around the container axis in a cross-sectional view orthogonal to the container axis of the container body. Between the outer peripheral surface of the cylinder and the inner peripheral surface of the cylinder cover, a non-formed portion of the seal portion communicates with the outside air introduction passage and is a communication portion extending along the circumferential direction in a cross-sectional view. The length of the communication portion along the circumferential direction is shorter than the length of the seal portion along the circumferential direction, the ejector.

4. In the ejector according to claim 3, The inflow passage is formed in an arc shape extending along the circumferential direction in a cross-sectional view between the outer peripheral surface of the cylinder and the inner peripheral surface of the cylinder cover. The communication portion and the inflow passage are arranged such that their circumferential positions are different from each other, the ejector.

5. In the ejector according to any one of claims 1 to 4, A positioning member for positioning the cylinder cover in the circumferential direction with respect to the cylinder is provided between the cylinder and the cylinder cover, the ejector.

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