JP2020001789A - Two-liquid mixing container and ejection container for mixing two liquids - Google Patents

Abstract

To provide a two-liquid mixing container capable of reducing the need to shake and mix.SOLUTION: A two-liquid mixing container 1 comprises: a first container 1a having a pressure accumulating pump 3 and a second container 1b. The first container 1a is used in an inverted posture to mix a content liquid C1 with a second content liquid C2 contained in the second container 1b. The pressure accumulating pump 3 comprises: a fixed part 7 having a suction port 5 and a cylinder 6; an operating part 11 having a pressed part 8 pressed against an opening 4a of a second container body 4, a piston 9 and an ejection port 10, and capable of moving back and forth with respect to the fixed part 7; and a pump chamber 12 partitioned into a flow path R ranging from the suction port 5 to the ejection port 10 by the fixed part 7 and the operating part 11. A recessed part 23 is provided in an inner peripheral surface of the cylinder 6 so that a part of the flow path R between itself and the piston 9 is formed when the operating part 11 advances.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a two-liquid mixing container and a two-liquid mixing ejection container.

  A second container for storing the first content liquid and a second container for storing the second content liquid, wherein the first container is used in an inverted posture to mix the first content liquid with the second content liquid; As a liquid mixing container, for example, one described in Patent Document 1 is known. In the two-liquid mixing container described in Patent Literature 1, the mouth of the first container in the inverted posture is attached to the mouth of the second container in the upright posture, and the first content liquid is subjected to the first content liquid by its own weight. It is configured to be introduced into two containers.

JP-A-9-254988

  In the conventional two-liquid mixing container as described above, it is necessary to shake the second container after introducing the first content liquid into the second container, and there is room for improvement in usability. In addition, for example, when mixing with a content liquid that is difficult to mix by shaking with carbon dioxide or the like, it is desirable that mixing can be performed without shaking as much as possible.

  An object of the present invention is to provide a two-liquid mixing container and a two-liquid mixing ejection container that can reduce the necessity of shaking and mixing and can be easily mixed.

The two-liquid mixing container according to one embodiment of the present invention,
A first container including a first container body having a cylindrical mouth portion connected to a storage space for storing the first content liquid, and a pressure accumulation pump;
A second container provided with a second container body having a cylindrical mouth portion connected to a storage space for storing the second content liquid,
The first container is used in an inverted posture to mix the first content liquid with the second content liquid contained in the second container,
The accumulator pump,
A fixing portion fixed to the mouth portion of the first container body and having a suction port for the first content liquid and a cylinder;
A cylinder having a pressing portion pressed against the mouth of the second container body, a piston slidable on an inner peripheral surface of the cylinder, and an ejection port for the first content liquid; An actuating part that can advance and retreat in the axial direction of
A pump chamber partitioned by the fixed portion and the operating portion into a flow path from the suction port to the jet port, and having a volume reduced by advancing the operating portion and increasing by a retreat of the operating portion. When,
A backflow prevention unit located upstream of the pump chamber,
A concave portion is formed on an inner peripheral surface of the cylinder to form a part of the flow path between the cylinder and the piston as the operating portion advances.

The two-liquid mixing container according to the present invention,
The actuation unit,
A piston member having the piston,
A pressing member that is attached to the piston member to form another part of the flow path between the piston member and the pressing member, and that has the pressing portion.

  In the two-liquid mixing container according to the present invention, an air chamber may be provided inside the pump chamber so as to expand and contract air in accordance with an increase and decrease in the internal pressure of the pump chamber.

The two-liquid mixing container according to the present invention,
The fixing part,
A top wall extending radially inward from the cylinder and having the suction port;
A cylindrical wall hanging down from the top wall and surrounding the suction port,
A valve member that has a valve body that constitutes the backflow prevention unit and that fits inside the cylindrical wall,
The air chamber may be defined by an outer peripheral surface of the cylindrical wall, a lower surface of the top wall, and an inner peripheral surface of the cylinder.

  The two-liquid mixing container according to the present invention may be a sealed container in which the first container main body can be ejected from the ejection port of the pressure accumulation pump without replacing the first content liquid with air.

The two-liquid mixing ejection container according to one embodiment of the present invention,
A container main body having a cylindrical mouth portion connected to the storage space for storing the content liquid, and a pressure accumulation pump,
The content liquid is used in an inverted posture to be mixed with another content liquid stored in a storage space connected to a cylindrical mouth portion of a container body of another container,
The accumulator pump,
A fixed portion fixed to the mouth of the container body and having a suction port and a cylinder for the content liquid,
The container has a pressing portion pressed against the mouth portion of the other container body, a piston slidable on the inner peripheral surface of the cylinder, and a discharge port for the content liquid, and the shaft of the cylinder with respect to the fixed portion. An operating part that can move back and forth in the direction,
A pump chamber partitioned by the fixed portion and the operating portion into a flow path from the suction port to the jet port, and having a volume reduced by advancing the operating portion and increasing by a retreat of the operating portion. When,
A backflow prevention unit located upstream of the pump chamber,
A concave portion is formed on an inner peripheral surface of the cylinder to form a part of the flow path between the cylinder and the piston as the operating portion advances.

  ADVANTAGE OF THE INVENTION According to this invention, the necessity of shaking and mixing can be reduced, and the two-liquid mixing container and the jet container for two-liquid mixing which can be easily mixed can be provided.

It is a partial section side view showing the 1st container (spout container for two liquid mixing) of the two liquid mixing container concerning one embodiment of the present invention in an upside down state at the time of non-use. FIG. 2 is a cross-sectional view illustrating a state where the first container illustrated in FIG. 1 is placed on an opening of a container body of a second container with an opening / closing lid removed, and pushing down is started. FIG. 3 is a partial cross-sectional side view showing a state in which the first container is further pressed down from the state of FIG. 2 and the first content liquid is mixed with the second content liquid. FIG. 4 is a partially enlarged view of FIG. 3. FIG. 5 is a partially enlarged view of FIG. 4.

  Hereinafter, a two-liquid mixing container and a two-liquid mixing ejection container according to an embodiment of the present invention will be described in detail with reference to the drawings. In the vertical direction, the first container is based on the inverted state, and the second container is based on the upright state. That is, the upper side of the first container means, for example, the upper side in FIG. 1, and the lower side means the opposite direction. In addition, the upper side of the second container means, for example, the upper side in FIG. 3, and the lower side means the opposite direction. Further, the term “axial direction” means the axial direction of a cylinder described later. Similarly, the term “radial direction” simply means the radial direction of the cylinder.

  As shown in FIGS. 1 to 3, the two-liquid mixing container 1 according to the present embodiment includes a first container (a two-liquid mixing ejection container according to the present embodiment) 1a and a second container 1b. As shown in FIG. 1, the first container 1a is configured so that it can be stored in an inverted posture when not in use. As shown in FIGS. 2 and 3, the first container 1a mixes the first content liquid C1 stored in the first container 1a with the second content liquid C2 stored in the second container 1b. In addition, it is configured to be used in an inverted posture.

  As shown in FIG. 1, the first container 1a includes a first container main body 2 and a pressure accumulating pump 3. The first container main body 2 has a cylindrical mouth 2a, a body 2b having one end connected to the mouth 2a, and a bottom 2c connected to the body 2b. The bottom 2c has a substantially conical shape so that the first container main body 2 is not accidentally stored in an upright state. However, the shape of the first container main body 2 can be appropriately changed. For example, the first container main body 2 may have a bottle shape having a bottom portion that can be a ground portion in an upright posture. An accommodation space S1 for accommodating the first content liquid C1 is formed inside the first container body 2. The mouth 2a is continuous with the accommodation space S1. On the outer peripheral surface of the mouth 2a, a male screw for screwing the pressure accumulating pump 3 is provided. However, a convex portion or a concave portion for attaching the pressure accumulating pump 3 by tapping may be provided on the outer peripheral surface of the mouth portion 2a instead of such a male screw.

  The first container main body 2 is formed by blow molding, partitions the storage space S1 of the first content liquid C1 inside, and is deformable so as to reduce the volume with the ejection of the first content liquid C1. And a delamination container (delamid container) including: an outer layer body L2 accommodating the inner layer body L1 inside; and an outside air inlet (not shown) capable of introducing outside air between the inner layer body L1 and the outer layer body L2. It is configured. The outside air inlet can be provided, for example, at the bottom 2c or the mouth 2a of the first container body 2. When the first container body 2 is formed by extrusion blow molding (EBM) of a laminated parison, the bottom crack of the outer layer body L2 formed by sandwiching the split mold in the bottom 2c of the first container body 2. The slit having the shape of a circle can be used as an outside air inlet. A through hole for the outer layer body L2 may be provided in the mouth 2a, and the through hole may constitute an outside air inlet. The first container main body 2 is not limited to a laminated peeling container formed by extrusion blow molding, and is, for example, a laminated peeling container formed by biaxially stretch blow molding a preform having a bottomed cylindrical laminated structure. Is also good. Further, the first container main body 2 may be a double container other than the laminated peeling container. That is, the first container body 2 may be formed by separately forming the inner layer body L1 and the outer layer body L2 and then combining them. As described above, the first container main body 2 of the present embodiment is configured as a sealed container that can be ejected from the ejection port 10 of the pressure accumulation pump 3 without replacing the first content liquid C1 with air. The first container main body 2 may be a sealed container other than the double container as described above. For example, with the ejection of the first content liquid C1, the inner plate disposed inside the container main body may be a storage space S1. It may be a medium dish type container that can be moved so as to reduce the volume of the medium. In addition, the first container body 2 is not limited to the above-described sealed container, and, for example, introduces outside air into the storage space S1 with the removal of the first content liquid C1, and, on the other hand, the first content liquid from the storage space S1. It may have a check valve structure for preventing leakage of C1.

  As shown in FIG. 3, the second container 1b includes a second container main body 4 and a cap having a cylindrical shape with a top (not shown). The second container body 4 has a bottle shape having a cylindrical mouth 4a, a body 4b connected to the mouth 4a, and a bottom 4c connected to the body 4b. Inside the second container body 4, an accommodation space S2 for accommodating the second content liquid C2 is formed. The mouth 4a is continuous with the accommodation space S2. An external thread for attaching the cap by screwing is provided on the outer peripheral surface of the mouth 4a.

  Examples of the first content liquid C1 stored in the first container 1a include, but are not limited to, flavor, whiskey, syrup, and milk. In addition, examples of the second content liquid C2 stored in the second container 1b include, but are not limited to, carbonated beverages such as carbonated water, water, and coffee. Further, the first content liquid C1 and the second content liquid C2 may be other than beverages.

  As shown in FIG. 1, the pressure accumulating pump 3 is fixed to the mouth 2 a of the first container body 2 and has a fixed portion 7 having a suction port 5 for the first content liquid C1 and a cylinder 6, and a second container body. 4 has a pressing portion 8 pressed against the mouth 4a (see FIGS. 2 and 3), a piston 9 slidable on the inner peripheral surface of the cylinder 6, and a jet port 10 for the first content liquid C1 and fixed. An actuating section 11 which is capable of moving back and forth in the axial direction of the cylinder 6 with respect to the section 7. Note that “movable to and from the fixed portion 7” means that the device can be moved forward and backward (up and down) relative to the fixed portion 7. Further, the pressure accumulating pump 3 is divided into a flow path R from the suction port 5 to the ejection port 10 by the fixing part 7 and the operating part 11, and the volume is reduced by the advance of the operating part 11, The pump includes a pump chamber 12 whose volume increases due to retreat, a backflow prevention unit 13 located upstream of the pump chamber 12, and a coil spring 14 for urging the operating unit 11 in the retreating direction. The forward movement of the operating unit 11 means the forward movement (upward) of the operating unit 11 relative to the fixed unit 7, and the retreat of the operating unit 11 refers to the retreat of the operating unit 11 relative to the fixed unit 7 ( Descent). Further, the pressure accumulating pump 3 includes an opening / closing lid 15 that closes the ejection port 10 so as to be openable.

  The fixing portion 7 has a mounting member 16 attached to the mouth 2 a of the first container body 2, a cylinder fixed to the mouth 2 a of the first container body 2 by the attachment member 16 and having the suction port 5 and the cylinder 6. And a valve member 18 having a valve element 18a constituting the backflow prevention portion 13. Further, the operating portion 11 forms a part of the flow path R (a part from the piston 9 to the ejection port 10) between the piston member 19 having the piston 9 and the piston member 19 by being attached to the piston member 19. And a pressing member 20 having a pressing portion 8 and an ejection port 10. Further, the opening / closing lid 15 is constituted by an opening / closing lid member 21 that is detachable from the pressing member 20. Note that the member configurations of the fixing unit 7, the operating unit 11, and the opening / closing lid 15 can be appropriately changed. Each member may be made of, for example, a synthetic resin, but is not limited thereto. For example, the coil spring 14 may be made of metal.

  The cylindrical member 17 extends radially inward from the upper end of the cylindrical cylinder 6 and has a top wall 17 a having the suction port 5, a cylindrical tube hanging from the top wall 17 a and surrounding the suction port 5. And a wall 17b. A valve member 18 is fitted inside the cylindrical wall 17b. An air chamber 22 is defined by the outer peripheral surface of the cylindrical wall 17b, the lower surface of the top wall 17a, and the inner peripheral surface of the cylinder 6. The air chamber 22 accommodates air inside the pump chamber 12 so as to be able to expand and contract according to the rise and fall of the internal pressure of the pump chamber 12. In the upper part of the inner peripheral surface of the cylinder 6, a concave part that forms a part of the flow path R (a part connecting the pump chamber 12 and the downstream side of the piston 9) with the piston 9 as the operating part 11 advances. 23 (see FIG. 5). The concave portion 23 is constituted by vertical grooves provided at a plurality of positions in the circumferential direction and extending in the vertical direction. However, the concave portion 23 may be constituted by a vertical groove provided only at one location in the circumferential direction. At the lower end of the cylindrical wall 17b, when the piston 9 abuts on the lower end of the cylindrical wall 17b by advancing, the communication between the radially inner space of the cylindrical wall 17b and the radially outer space of the cylindrical wall 17b is maintained. Are provided at a plurality of locations in the circumferential direction. The communication port 17c may be provided at only one location in the circumferential direction. Further, the communication port 17c may not be provided. The lower end of the cylinder 6 is connected via a tapered wall to the upper end of a cylindrical lower cylinder 17 d having a larger diameter than the cylinder 6. The outer peripheral surface of the lower cylinder 17d is in contact with the inner peripheral surface of the mouth 2a. A horizontal annular flange 17e extends radially outward from the lower end of the lower cylinder 17d. The upper surface of the flange 17e is in contact with the lower end of the mouth 2a.

  The valve member 18 has a fitting wall 18b that has an annular shape and whose outer peripheral surface is fitted to the inner peripheral surface of the cylindrical wall 17b in a state where the upper surface is in contact with the lower surface of the top wall 17a. A plurality of connecting pieces connected to the outer peripheral edge of the disc-shaped valve element 18a are connected to the inner peripheral surface of the fitting wall 18b. However, the outer peripheral edge of the valve body 18a and the inner peripheral surface of the fitting wall 18b may be connected by a single connecting piece. The lower surface of the outer peripheral edge of the suction port 5 is in close contact with the upper surface of the valve element 18a.

  The attachment member 16 has a cylindrical attachment cylinder 16a attached to the mouth 2a of the first container body 2. On the inner peripheral surface of the mounting cylinder 16a, a female screw that is screwed with a male screw provided on the outer peripheral surface of the mouth 2a is provided. An outer peripheral edge of a horizontal annular wall 16b is connected to a lower end of the mounting cylinder 16a. The upper surface of the horizontal annular wall 16b is in contact with the lower surface of the flange 17e. A cylindrical inner cylinder wall 16c extends upward from the inner peripheral edge of the horizontal annular wall 16b. A horizontal annular inward flange 16d extends radially inward from the upper end of the inner cylindrical wall 16c. A cylindrical guide cylinder 16e extending in the axial direction is connected to the inner peripheral edge of the inward flange 16d. The upper end of the outer peripheral surface of the guide cylinder 16e is in contact with the lower end of the inner peripheral surface of the cylinder 6.

  The piston 9 of the piston member 19 has a substantially cylindrical shape, and its upper portion gradually increases in diameter upward, and its lower portion gradually increases in diameter downward. In addition, the upper end of the outer peripheral surface of the piston 9 slides in the axial direction on the inner peripheral surface of the cylinder 6 when not used as shown in FIG. In a state in which the operating portion 11 is located at the front end position where the operating portion 11 is most advanced while being movably close to each other, a gap is formed between the concave portion 23 and the inner peripheral surface of the cylinder 6 as shown in FIG. ing. The lower end of the outer peripheral surface of the piston 9 is configured to be in close contact with the inner peripheral surface of the cylinder 6 slidably in the axial direction regardless of the position of the operating portion 11. A vertically intermediate portion of the piston 9 is connected to an upper end of an outer peripheral surface of the cylindrical fitting tube 19b by an annular connection wall 19a. The piston 9, the connecting wall 19a, and the fitting cylinder 19b are provided with through holes 24 that radially penetrate these at a plurality of locations in the circumferential direction. However, the through hole 24 may be provided at only one location in the circumferential direction. The outer peripheral edge of the disc-shaped upper wall 19c is connected to the upper end of the inner peripheral surface of the fitting cylinder 19b. At the center of the upper wall 19c, a rod-shaped pin 19d whose diameter is slightly reduced downward is vertically provided.

  The pressing member 20 has a cylindrical fitting cylinder wall 20a fitted on the outer peripheral surface of the fitting cylinder 19b. A horizontal annular inward flange 20b extends radially inward from a vertically intermediate portion of the inner peripheral surface of the fitting cylindrical wall 20a. The lower surface of the fitting tube 19b is in contact with the upper surface of the inward flange 20b. On the inner peripheral edge of the inward flange 20b, a cylindrical outer cylinder wall 20c whose diameter is slightly reduced upward is provided upright. The lower end of the outer peripheral surface of the outer cylinder wall 20c is in close contact with the inner peripheral surface of the fitting cylinder 19b. The upper end of the outer cylinder wall 20c is connected to the upper end of the cylindrical inner cylinder wall 20e by a horizontal annular top wall 20d. The outer peripheral edge of a disk-shaped nozzle tip wall 20f having a jet port 10 at the center is connected to the lower end of the inner cylindrical wall 20e. A gap is formed between the top wall 20d and the upper wall 19c and between the inner cylinder wall 20e and the pin 19d to form a part of the flow path R. The inner peripheral edge of the horizontal annular pressing portion 8 is connected to the lower end of the fitting cylindrical wall 20a. In the pressing portion 8, a cylindrical stopper cylinder 20g is provided upright. The lower end of the coil spring 14 is in contact with or close to the inner peripheral surface of the stop cylinder 20g. The upper end of the coil spring 14 is located between the inner cylinder wall 16c and the guide cylinder 16e. A cylindrical guide upper wall 20 h is provided upright on the outer peripheral edge of the pressing portion 8. The upper guide wall 20h faces the outer peripheral surface of the mounting cylinder 16a. Further, a cylindrical guide lower wall 20i is vertically provided on an outer peripheral edge of the pressing portion 8.

  The opening / closing lid member 21 has a horizontal annular lid plate 21a having an outer diameter larger than the guide lower wall 20i and an inner diameter larger than the inner cylindrical wall 20e. A fitting cylinder 21b that is detachably fitted into the lower guide wall 20i is provided upright on the lid plate 21a. A cylindrical seal cylinder 21c capable of closely fitting the inner cylinder wall 20e is provided upright on the inner peripheral edge of the lid plate 21a. The upper portion of the inner peripheral surface of the seal cylinder 21c is closed by a horizontal disk-shaped closing wall 21d.

  The procedure for mixing two liquids using the two-liquid mixing container 1 according to the present embodiment is as follows. First, the user removes the opening / closing lid member 21 from the guide lower wall 20i, puts the guide lower wall 20i on the mouth 4a of the second container body 4, and places the pressing portion 8 on the mouth as shown in FIG. 4a. In this state, when the user pushes down the first container body 2, the operating part 11 advances with respect to the fixing part 7, the volume of the pump chamber 12 decreases, and the internal pressure of the pump chamber 12 increases.

  In the present embodiment, since the air chamber 22 is provided in the pump chamber 12, the operating section 11 can be advanced while compressing air, which is a compressible fluid, with the accumulation of pressure in the pump chamber 12. Therefore, the operation force required for pushing down the first container body 2 can be reduced, and the usability can be improved.

  As shown in FIG. 5, when the operating portion 11 reaches the front end position, the piston 9 reaches the concave portion 23 of the cylinder 6, and the pump chamber 12 and a portion of the flow path R downstream of the piston 9 pass through the concave portion 23. Communicate. Accordingly, the first content liquid C1 accumulated in the pump chamber 12 passes from the pump chamber 12 through the concave portion 23, the through-hole 24, and the portion between the piston member 19 and the pressing member 20, and from FIG. As shown in FIG. Therefore, the first content liquid C1 vigorously rushes into the second content liquid C2 stored in the storage space S2 of the second container body 4, and is thereby mixed with the second content liquid C2. Therefore, according to the two-liquid mixing container 1 according to the present embodiment, it is possible to reduce the necessity of shaking and mixing after introducing the first content liquid C1 into the second container main body 4. Further, by pressing down the first container body 2 with a full stroke, a fixed amount of the first content liquid C1 corresponding to the full stroke can be introduced into the second container body 4. Therefore, according to the two-liquid mixing container 1 according to the present embodiment, quantitative mixing can be easily performed.

  When the depression of the first container body 2 is released, the operating portion 11 is retracted by the urging force of the coil spring 14, the volume of the pump chamber 12 increases, the internal pressure of the pump chamber 12 decreases, and the internal pressure of the accommodation space S1 is reduced. Negative pressure is applied. Due to the negative pressure, the valve element 18a separates from the top wall 17a, and the first content liquid C1 flows into the pump chamber 12 from the storage space S1. At this time, the air compressed inside the air chamber 22 expands inside the air chamber 22 with the negative pressure.

  Then, the two-liquid mixing container 1 returns to the state as shown in FIG. When a further amount of the first content liquid C1 is desired to be mixed, the user may repeat the above-described operation of pressing down the first container body 2 from this state.

  The above-described embodiment is merely an example of the embodiment of the present invention, and it goes without saying that various modifications can be made without departing from the spirit of the invention.

  For example, in the above-described embodiment, the opening / closing lid 15 is configured separately from the pressing member 20, but may be configured to be connected to the pressing member 20 via a hinge. Further, a configuration in which the opening / closing lid 15 is not provided may be adopted.

DESCRIPTION OF SYMBOLS 1 Two-liquid mixing container 1a 1st container 1b 2nd container 2 1st container main body 2a mouth 2b trunk 2c bottom 3 Accumulation pump 4 2nd container main body 4a mouth 4b trunk 4c bottom 5 suction port 6 cylinder 7 fixed part 8 Pressing part 9 Piston 10 Spout 11 Working part 12 Pump chamber 13 Backflow prevention part 14 Coil spring 15 Opening / closing lid 16 Mounting member 16a Mounting cylinder 16b Horizontal annular wall 16c Inner cylinder wall 16d Inward flange 16e Guide cylinder 17 Cylindrical member 17a Top wall 17b Cylindrical wall 17c Communication port 17d Lower cylinder 17e Flange 18 Valve member 18a Valve body 18b Fitting wall 19 Piston member 19a Connecting wall 19b Fitting cylinder 19c Upper wall 19d Pin 20 Pressing member 20a Fitting cylinder wall 20b Orientation flange 20c Outer cylinder wall 20d Top wall 20e Inner cylinder wall 20f Nozzle tip wall 20g Stop Cylinder 20h Guide upper wall 20i Guide lower wall 21 Opening / closing lid member 21a Cover plate 21b Fitting cylinder 21c Seal cylinder 21d Closing wall 22 Air chamber 23 Depression 24 Through hole C1 First content liquid C2 Second content liquid S1, S2 Storage space L1 Inner layer Body L2 Outer layer body R Flow path

Claims (6)

A first container including a first container body having a cylindrical mouth portion connected to a storage space for storing the first content liquid, and a pressure accumulation pump;
A second container provided with a second container body having a cylindrical mouth portion connected to a storage space for storing the second content liquid,
The first container is used in an inverted posture to mix the first content liquid with the second content liquid contained in the second container,
The accumulator pump,
A fixing portion fixed to the mouth portion of the first container body and having a suction port for the first content liquid and a cylinder;
A cylinder having a pressing portion pressed against the mouth of the second container body, a piston slidable on an inner peripheral surface of the cylinder, and an ejection port for the first content liquid; An actuating part that can advance and retreat in the axial direction of
A pump chamber partitioned by the fixed portion and the operating portion into a flow path from the suction port to the jet port, and having a volume reduced by advancing the operating portion and increasing by a retreat of the operating portion. When,
A backflow prevention unit located upstream of the pump chamber,
On the inner peripheral surface of the cylinder, there is provided a concave portion that forms a part of the flow path between the piston and the piston as the operating portion advances.
Two-part mixing container. The actuation unit is
A piston member having the piston,
A pressing member having the pressing portion while forming another part of the flow path between the piston member and the piston member by being attached to the piston member.
The two-component mixing container according to claim 1.   3. The two-liquid mixing container according to claim 1, wherein an air chamber is provided inside the pump chamber so as to expand and contract according to the rise and fall of the internal pressure of the pump chamber. 4. The fixing portion,
A top wall extending radially inward from the cylinder and having the suction port;
A cylindrical wall hanging down from the top wall and surrounding the suction port,
A valve member that has a valve body that constitutes the backflow prevention unit and that fits inside the cylindrical wall,
The air chamber is defined by an outer peripheral surface of the cylindrical wall, a lower surface of the top wall, and an inner peripheral surface of the cylinder.
The two-part mixing container according to claim 3.   The two-package according to any one of claims 1 to 4, wherein the first container body is a sealed container that can be jetted from the jet port of the pressure accumulation pump without replacing the first content liquid with air. Mixing container. A container main body having a cylindrical mouth portion connected to the storage space for storing the content liquid, and a pressure accumulation pump,
The content liquid is used in an inverted posture to be mixed with another content liquid stored in a storage space connected to a cylindrical mouth portion of a container body of another container,
The accumulator pump,
A fixed portion fixed to the mouth of the container body and having a suction port and a cylinder for the content liquid,
The container has a pressing portion pressed against the mouth portion of the other container body, a piston slidable on the inner peripheral surface of the cylinder, and a discharge port for the content liquid, and the shaft of the cylinder with respect to the fixed portion. An operating part that can move back and forth in the direction,
A pump chamber partitioned by the fixed portion and the operating portion into a flow path from the suction port to the jet port, and having a volume reduced by advancing the operating portion and increasing by a retreat of the operating portion. When,
A backflow prevention unit located upstream of the pump chamber,
On the inner peripheral surface of the cylinder, a concave portion that forms a part of the flow path between the piston and the piston as the operating portion advances is provided.
Spout container for two-component mixing.

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