JP2017071408A - cap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cap capable of reducing a residual quantity of a content liquid of remaining in an injection cylinder when releasing pressing operation.SOLUTION: An inner plug 15 and a first inner valve 31 are provided on the inside of a cap body 11, and the inner plug 15 comprises an inner cylinder part 29 for communicating one end part with the inside of an inner container 2 and communicating the other end part with the inside of an injection cylinder 12, and the first inner valve 31 comprises a first valve element 33 for covering the other end opening part of the inner cylinder part 29, and a circulation hole 35 is formed in the first valve element 33, and the first valve element 33 is freely deformed in an opening position of swelling in a convex shape in the injection cylinder 12 and a closing position of retreating in a concave shape in the inner cylinder part 29, and when the first valve element 33 is the closing position, a space between the inner cylinder part 29-inside and the injection cylinder 12-inside is cut off by the first valve element 33, and when the first valve element 33 is the opening position, a space between the inner cylinder part 29-inside and the injection cylinder 12-inside is communicated via the circulation hole 35.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cap attached to the mouth of a double container.

  Conventionally, as this type of cap, for example, as shown in FIGS. 12 and 13, a cap main body 103 fitted on the mouth portion 102 of the double container 101, and a dispensing cylinder 104 provided on the cap main body 103, A lid 105 that opens and closes the tip opening of the dispensing tube 104, an inner plug 106 that is provided inside the cap body 103 and is fitted into the mouth portion 102, and a valve device 107 that is provided inside the cap body 103. Have.

  A discharge hole 108 is formed in the inner plug 106. The valve device 107 includes a fitting portion 109, a disc portion 110, a disc-like discharge valve 111, and a suction valve (not shown). The discharge valve 111 is a valve that opens and closes the discharge hole 108, and is provided in the fitting portion 109 so as to be swingable in the vertical direction via the connecting portion 113. The suction valve is a valve that opens and closes between the air inlet hole 114 and the air inlet passage 115.

  The lid 105 has a cylindrical inner ring 119 inside. When the lid 105 is closed, the inner ring 119 fits into the distal end opening of the dispensing cylinder 104, whereby the distal opening of the dispensing cylinder 104 is sealed.

  According to this, when the lid 105 is opened and the double container 101 is pressed, the suction valve is closed, the air inlet hole 114 and the air inlet path 115 are blocked, and the outer layer 116 of the double container 101 is closed. Since the air between the inner layer 117 and the inner layer 117 is not discharged and the internal pressure of the double container 101 rises, the discharge valve 111 opens the discharge hole 108 as shown in FIG. The liquid 118 is poured out from the dispensing cylinder 104 through the discharge hole 108.

  When the pressing operation is released, the internal pressure of the double container 101 is reduced from the atmospheric pressure by the restoring force of the outer layer 116 of the double container 101, and the discharge valve 111 closes the discharge hole 108 as shown in FIG. The space between the outer layer 116 and the inner layer 117 of the double container 101 decreases from the atmospheric pressure, the suction valve opens, and the atmosphere passes from the air inlet hole 114 through the air inlet passage 115 to the outer layer 116 and the inner layer 117. Introduced between.

  The cap as described above is described in, for example, Patent Document 1 below.

Patent No. 3688373

  However, in the above conventional type, when the pressing operation is released and the discharge valve 111 closes the discharge hole 108 as shown in FIG. 14, the content liquid 118 passes from the inside of the dispensing tube 104 through the discharge port 108. There is a problem that it is difficult to reduce the residual amount of the content liquid 118 because it does not return completely into the double container 101 but remains in the dispensing cylinder 104.

  Further, as described above, when the amount of the content liquid 118 remaining in the dispensing cylinder 104 is large, when the inner ring 119 is fitted into the tip opening of the dispensing cylinder 104 by closing the lid 105, the dispensing cylinder There is a possibility that the content liquid 118 remaining in the liquid 104 overflows to the outside of the dispensing cylinder 104.

  An object of this invention is to provide the cap which can reduce the residual amount of the content liquid which remains in the extraction pipe | tube when releasing pressing operation.

In order to achieve the above object, the first invention is a cap attached to the mouth of a double container having a deformable inner container and an outer container,
A cap body fitted on the mouth of the double container;
A dispensing tube provided on the cap body;
A lid that opens and closes the spout opening at the tip of the pour tube;
An inner cap provided inside the cap body and fitted into the mouth of the double container;
A first internal valve provided inside the cap body,
The inner plug has an inner cylinder portion whose one end communicates with the inside of the inner container and the other end communicates with the inside of the dispensing tube,
The first internal valve has a first valve body that covers the other end opening of the inner cylinder,
A flow hole is formed in the first valve body;
The first valve body can be deformed into an open position that bulges into a convex shape in the dispensing cylinder and a closed position that retreats into a concave shape in the inner cylinder portion, and is biased in the closing direction. ,
When the first valve body is in the closed position, the inside of the inner cylinder portion and the inside of the extraction cylinder are blocked by the first valve body,
When the first valve body is in the open position, the inside of the inner cylinder portion and the inside of the extraction cylinder communicate with each other via the flow hole of the first valve body.

  According to this, by opening the lid and pressing the double container, the internal pressure of the double container rises, and the first valve body is poured out from the closed position where it retracts into the inner cylinder part in a concave shape. It deforms into an open position that bulges into a convex shape in the cylinder. As a result, the inside of the inner cylinder part and the inside of the dispensing cylinder communicate with each other via the flow hole of the first valve body, and the content liquid in the inner container passes through the circulation hole from the inside of the inner cylinder part and enters the inside of the dispensing cylinder. To be discharged from the outlet.

Moreover, by releasing the pressing operation of the double container, the first valve body is deformed from an open position where it bulges in a convex shape into the extraction cylinder to a closed position where it retracts into a concave shape within the inner cylinder part. And the inside of an inner cylinder part and the inside of a extraction cylinder are interrupted | blocked by the 1st valve body.
Thus, when the first valve body is closed, the first valve body is deformed from a convex shape that bulges into the extraction cylinder to a concave shape that retreats into the inner cylinder portion. Most of the liquid is drawn into the inner cylinder portion with the deformation of the first valve body. Thereby, the amount of the content liquid remaining in the dispensing cylinder after the first valve body is closed can be reduced.

In the cap according to the second aspect of the present invention, the flow hole has a first flow hole formed in the center of the first valve body,
The inner cylinder portion has a communication path communicating with the inside of the inner container and the inside of the extraction cylinder, and a closing member inside.
When the first valve body is in the closed position, the first valve body comes into contact with the closing member, and the first flow hole is closed with the closing member,
When the first valve body is in the open position, the first valve body is separated from the closing member, and the inside of the inner cylinder portion and the inside of the extraction cylinder communicate with each other through the first flow hole.

  According to this, by opening the lid and pressing the double container, the internal pressure of the double container rises, and the first valve body is poured out from the closed position where it retracts into the inner cylinder part in a concave shape. It deforms into an open position that bulges into a convex shape in the cylinder. As a result, the first valve body is separated from the closing member, the inside of the inner cylinder part and the inside of the extraction cylinder communicate with each other via the first flow hole, and the content liquid in the inner container is transferred from the inside of the inner cylinder part. It flows into the pouring cylinder through the first flow hole, and is poured out from the pouring outlet.

  Moreover, by releasing the pressing operation of the double container, the first valve body is deformed from an open position where it bulges in a convex shape into the extraction cylinder to a closed position where it retracts into a concave shape within the inner cylinder part. To do. As a result, the first valve body comes into contact with the closing member, the first flow hole is closed with the closing member, and the inside of the inner cylinder portion and the inside of the extraction cylinder are blocked by the first valve body.

In the cap according to the third aspect of the present invention, the flow hole has a plurality of second flow holes formed around the first flow hole,
When the first valve body is in the closed position, the first valve body comes into contact with the other end portion of the inner cylinder portion, and the second flow hole is closed at the other end portion of the inner cylinder portion,
When the first valve body is in the open position, the first valve body is separated from the other end portion of the inner cylinder portion, and the first and second flow holes are formed between the inner cylinder portion and the extraction cylinder. Communicate with each other.

  According to this, by opening the lid and pressing the double container, the internal pressure of the double container rises, and the first valve body is poured out from the closed position where it retracts into the inner cylinder part in a concave shape. It deforms into an open position that bulges into a convex shape in the cylinder. Accordingly, the first valve body is separated from the closing member and is separated from the other end portion of the inner cylinder portion, and the inside of the inner cylinder portion and the inside of the extraction cylinder communicate with each other via the first and second flow holes. Then, the content liquid in the inner container flows from the inner cylinder portion through the first and second flow holes into the extraction cylinder and is extracted from the outlet.

  Moreover, by releasing the pressing operation of the double container, the first valve body is deformed from an open position where it bulges in a convex shape into the extraction cylinder to a closed position where it retracts into a concave shape within the inner cylinder part. To do. As a result, the first valve body contacts the closing member and the other end portion of the inner cylinder portion, the first flow hole is closed by the blocking member, and the second flow hole is the other of the inner cylinder portion. The end portion is closed, and the inside of the inner cylinder portion and the inside of the extraction cylinder are blocked by the first valve body.

In the cap according to the fourth aspect of the invention, the cap body is formed with an intake port for sucking outside air between the inner container and the outer container,
Inside the cap body, a communication channel that communicates between the air inlet and the inner container and the outer container, and a second internal valve that opens and closes the air inlet,
The second internal valve is formed integrally with the first internal valve.

  According to this, by opening the lid and pressing the double container, the second internal valve closes the intake port, so that the internal pressure of the double container rises and the first valve body is opened from the closed position. Transforms into As a result, the inside of the inner cylinder portion and the inside of the dispensing cylinder communicate with each other via the flow hole of the first valve body, and the content liquid in the inner container passes from the inside of the inner container to the inside of the dispensing cylinder through the circulation hole. To be discharged from the outlet.

  In addition, when the internal pressure of the double container drops below the atmospheric pressure by releasing the pressing operation of the double container, the second internal valve opens the intake port, so that the atmosphere passes through the communication channel from the intake port. The first valve body is deformed from the open position to the closed position, and the inside of the inner cylinder portion and the inside of the extraction cylinder are blocked by the first valve body.

In the cap according to the fifth aspect of the invention, the second internal valve has an introduction part for introducing the content liquid of the inner container, and a second valve body that opens and closes by the content liquid introduced into the introduction part,
The second valve body can be deformed into a closed position that bulges into the intake port and closes the intake port, and an open position that retracts from the intake port to the introduction portion and opens the intake port, and is biased in the opening direction. The content liquid introduced into the introduction part is deformed from the open position to the closed position.

  According to this, by opening the lid and pressing the double container, the content liquid in the inner container is introduced into the introduction part, and the second valve body is deformed from the open position to the closed position, and expands into the intake port. And close the air intake. As a result, the internal pressure of the double container rises and the first valve body is deformed from the closed position to the open position, so that the space between the inner cylinder portion and the inside of the extraction cylinder passes through the flow hole of the first valve body. Thus, the content liquid in the inner container flows from the inner container through the flow hole into the dispensing cylinder and is poured out from the outlet.

  Further, by releasing the pressing operation of the double container, the content liquid returns from the introduction part into the inner container, and the second valve body is deformed from the closed position to the open position, and is retracted from the intake port to the introduction part. Open the air intake. As a result, air is introduced from the intake port through the communication channel between the inner container and the outer container, and the first valve body is deformed from the open position to the closed position. Is blocked by the first valve body.

  As described above, according to the present invention, when the pressing operation of the double container is released, the residual amount of the content liquid remaining in the dispensing cylinder can be reduced, and an excellent suction back effect on the content liquid can be achieved. Demonstrated.

It is sectional drawing of the cap in embodiment of this invention. It is a XX arrow line view in FIG. It is an enlarged sectional view of the inner cap of the cap. It is a XX arrow line view in FIG. It is an enlarged perspective view of the inner cap of the cap. It is an enlarged sectional view of the internal valve device of the cap. It is a XX arrow line view in FIG. It is sectional drawing which shows operation | movement of the 1st and 2nd internal valve of a cap similarly, and shows the state which a 1st valve body exists in a closed position, and a 2nd valve body exists in an open position. FIG. 6 is a cross-sectional view showing the operation of the first and second internal valves of the cap, wherein the first valve body is in the process of being deformed from the closed position toward the open position, and the second valve body is opened. The state which changed from the position to the closed position is shown. FIG. 6 is a cross-sectional view showing the operation of the first and second internal valves of the cap, showing a state where the first valve body has reached the open position and the second valve body is kept in the closed position. FIG. 6 is a cross-sectional view showing the operation of the first and second internal valves of the cap, in the middle of the deformation of the first valve body from the open position toward the closed position, and the second valve body is closed. The state which changed from the position to the open position is shown. It is sectional drawing of the conventional cap. FIG. 4 is a partially enlarged cross-sectional view of the cap, showing a state where the discharge valve is opened and the content liquid is poured out from the spout. FIG. 4 is a partially enlarged sectional view of the cap, showing a state in which the discharge valve is closed and the content liquid remains in the dispensing cylinder.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
In the first embodiment, as shown in FIGS. 1 and 2, reference numeral 1 denotes a flexible and deformable inner container 2 having flexibility and an elastically deformable outer container 3 having flexibility. It has a double container. A cap 5 is provided at the mouth 4 of the double container 1.

  The cap 5 includes a cap body 11 fitted to the mouth portion 4, a cylindrical pouring cylinder 12 provided on the cap body 11, and a lid that opens and closes a spout 13 that opens at the tip of the pouring cylinder 12. 14, an inner plug 15 provided inside the cap body 11 and fitted into the mouth portion 4, and an internal valve device 16 provided inside the cap body 11.

  The cap body 11 has a cylindrical body 20 and a disk-shaped top plate 21 provided at the tip of the body 20. The body portion 20 is screwed to the screw portion 22 of the outer container 3 via the screw portion 22. The dispensing cylinder 12 is provided integrally with the top plate portion 21. Further, the top plate portion 21 is formed with an air inlet 23 for sucking outside air 37 between the inner container 2 and the outer container 3.

A communication flow path 38 that communicates with the air inlet 23 and the space 37 between the inner container 2 and the outer container 3 is formed inside the cap body 11.
The lid 14 is provided on the cap body 11 so as to be freely opened and closed via a hinge portion 25, and has a protrusion 54 on the inner side. When the lid 14 is closed, the protruding portion 54 is inserted into the extraction tube 12 from the extraction port 13, whereby the extraction tube 12 is sealed.

  As shown in FIGS. 1, 3 to 5, the inner plug 15 includes a circular fitting portion 26 fitted into the tip opening of the inner container 2, and a radially outward projecting from the upper tip of the fitting portion 26. And a recessed portion 28 formed on the upper surface of the fitting portion 26 and recessed in a concave shape, and an inner cylinder portion 29 erected on the recessed portion 28. The inner cylinder portion 29 has a communication path 50 and a closing member 51 inside. The communication passage 50 has one end (lower end) communicating with the inner container 2 and the other end (upper end) communicating with the dispensing cylinder 12.

  The closing member 51 is a round bar-like member disposed at the center in the inner cylinder portion 29 and is attached in the inner cylinder portion 29 by a plurality of attachment plates 52 provided every 90 °. In addition, although the four attachment plates 52 are provided in FIG. 4, it is not limited to four.

  As shown in FIGS. 1, 6, and 7, the internal valve device 16 includes a first internal valve 31 and a second internal valve 32 made of an elastic member such as silicon rubber. The first internal valve 31 is a valve having an M-shaped cross section. The first internal valve 31 is a thin circular first valve body 33 that covers the other end opening 30 (see FIG. 3) of the inner cylindrical portion 29, and a cylindrical first The support cylinder 34 is provided. The inner cylinder portion 29 is inserted into the first support cylinder 34 from one end portion of the first support cylinder 34, and the outer peripheral portion of the first valve body 33 is provided integrally with the other end portion of the first support cylinder 34. It has been.

  A circular first flow hole 35 is formed in the central portion of the first valve body 33, and a plurality of second slits that are elongated in the circumferential direction are formed in the peripheral end portion of the first valve body 33. A flow hole 36 is formed. These second flow holes 36 are formed around the first flow holes 35.

  The first valve element 33 has a closed position S1 (see the solid line in FIG. 6, FIG. 8) that retreats into the inner cylinder portion 29 in a concave shape, and a convex shape from the inner cylinder portion 29 into the dispensing cylinder 12. It can be deformed to the bulging open position O1 (see the phantom line in FIG. 6, see FIG. 10) and is biased in the closing direction A1 (see FIG. 6).

  As shown in FIGS. 1 and 8, when the first valve body 33 is in the closed position S <b> 1, the first valve body 33 is connected to the distal end surface (upper end surface) of the closing member 51 and the other end surface (upper surface) of the inner cylinder portion 29. The first flow hole 35 is closed at the front end surface of the closing member 51, and the second flow hole 36 is closed at the other end surface of the inner cylinder portion 29, so that the inside of the inner cylinder portion 29 is closed. And the inside of the extraction cylinder 12 are blocked by the first valve body 33.

  As shown in FIG. 10, when the first valve body 33 is in the open position O <b> 1, the first valve body 33 is separated from the distal end surface of the closing member 51 and is separated from the other end surface of the inner cylindrical portion 29. In addition, the inside of the inner cylinder portion 29 and the inside of the dispensing cylinder 12 communicate with each other through the first and second flow holes 35 and 36.

  As shown in FIGS. 1, 6, and 7, the second internal valve 32 is provided integrally with the first internal valve 31 and opens and closes the intake port 23. In addition, it has an introduction part 41 for introducing the content liquid 6 in the inner container 2 and a thin circular second valve body 42 that can be elastically deformed and opened and closed by the content liquid 6 introduced into the introduction part 41.

The support cylinder 40 is integrally connected to the outer periphery of the first support cylinder 34 and is inserted into the recessed portion 28 of the inner plug 15. The introduction part 41 is formed inside the support tube 40 and communicates with the inside of the inner container 2 through a hole 53 (see FIG. 1) formed in the inner plug 15.
The second valve body 42 is provided integrally with the other end portion of the support cylinder 40, and is closed to the closed position S2 that bulges into the intake port 23 and closes the intake port 23 (imaginary line in FIG. 6, FIG. 9, 10) and an open position O2 (see the solid line in FIG. 6 and FIGS. 8 and 11) where the intake port 23 is opened by retracting from the intake port 23 to the introduction portion 41, and in the opening direction. It is biased to A2 (see FIG. 6), and is deformed from the open position O2 to the closed position S2 (see FIGS. 9 and 10) by the content liquid 6 introduced into the introduction part 41.

  As shown in FIG. 8, a housing part 45 that houses the first valve element 33 and a dispensing channel 46 that communicates from the housing part 45 to the spout 13 are formed in the dispensing cylinder 12. . In addition, the diameter d of the extraction channel 46 is smaller than the diameter D of the accommodating portion 45.

  An arcuate guide surface 48 that guides the content liquid 6 that has flowed from the inside of the inner cylinder portion 29 through the second flow hole 36 to the accommodating portion 45 in the extraction cylinder 12 to the extraction flow path 46 is provided in the extraction cylinder 12. Is formed inside. Thereby, the inner diameter of the dispensing cylinder 12 is gradually reduced from the housing portion 45 toward the dispensing flow path 46.

Hereinafter, the operation of the above configuration will be described.
As shown in FIG. 8, the lid 14 is opened, the double container 1 is held and tilted, and then the double container 1 is pressed (squeezed) to deform the outer container 3, and the inner container 2 and the outer container 3, the content liquid 6 in the inner container 2 is introduced into the introduction part 41 through the hole 53 as shown in FIG. 9, and the second valve body 42 is obtained. Is deformed to the closed position S2 that bulges into the intake port 23 and closes the intake port 23, so that the internal pressure of the double container 1 rises and the first valve element 33 has a concave shape in the inner cylindrical portion 29. From the retracted closed position S1 (see FIG. 8), it deforms upward toward the open position O1 (see FIG. 10) that bulges into the dispensing cylinder 12 in a convex shape.

  At this time, first, as shown in FIG. 9, the first valve body 33 is spaced upward from the distal end surface of the closing member 51 while maintaining the state in which the first valve body 33 is in contact with the other end surface of the inner cylinder portion 29. The inside and the inside of the dispensing cylinder 12 communicate with each other through the first circulation hole 35, and the content liquid 6 in the inner container 2 passes through the first circulation hole 35 from the inside of the inner cylinder portion 29. 12 flows out.

  Immediately thereafter, as shown in FIG. 10, when the first valve body 33 further bulges upward and deforms to the open position O1, the first valve body 33 is separated upward from the other end surface of the inner cylinder portion 29, The inside of the inner cylinder part 29 and the inside of the dispensing cylinder 12 communicate with each other via the first and second flow holes 35, 36, and the content liquid 6 in the inner container 2 flows from the inside of the inner cylinder part 29 to the first. And it flows into the extraction cylinder 12 through the second flow holes 35 and 36, and is extracted from the outlet 13.

  At this time, the content liquid 6 that has flowed through the first and second flow holes 35, 36 to the storage portion 45 in the extraction cylinder 12 is guided by the guide surface 48 and poured smoothly from the storage portion 45. Collected in the outlet channel 46, flows through the outlet channel 46, and is extracted from the outlet 13. Thereby, the flow of the content liquid 6 is not disturbed in the dispensing cylinder 12.

  In addition, when the pressing operation of the double container 1 is released, the outer container 3 is restored to the original shape before the pressing operation, and the pressure between the inner container 2 and the outer container 3 decreases below the atmospheric pressure, As shown in FIG. 11, the content liquid 6 returns from the introduction part 41 through the hole 53 into the inner container 2, and the second valve body 42 is retracted from the intake port 23 to the introduction part 41. And the air inlet 23 is opened.

  As a result, the atmosphere is introduced from the air inlet 23 through the communication flow path 38 into the space 37 between the inner container 2 and the outer container 3, and the first valve body 33 bulges into the dispensing cylinder 12 in a convex shape. From the open position O1 (refer to FIG. 10) to be deformed, it is deformed downward toward the closed position S1 (refer to FIG. 8) in which the inner cylinder part 29 is recessed into the concave shape.

  At this time, first, the content liquid 6 in the dispensing cylinder 12 passes through the first and second flow holes 35, 36, passes through the inner cylinder portion 29, and returns to the inner container 2. Immediately thereafter, as shown in FIG. 11, the first valve body 33 comes into contact with the other end surface of the inner cylinder portion 29, and the second flow hole 36 is closed at the other end surface of the inner cylinder portion 29, thereby The content liquid 6 in 12 passes through only the first flow hole 35 and returns to the inner container 2.

Immediately thereafter, as shown in FIG. 8, the first valve body 33 is deformed to the closed position S <b> 1, the first valve body 33 comes into contact with the distal end surface of the closing member 51, and the first flow hole 35 is formed. The front end surface of the closing member 51 is closed, whereby the first valve body 33 blocks the space between the inner cylinder portion 29 and the dispensing cylinder 12.
As described above, when the first valve body 33 is closed, the first valve body 33 moves from the convex shape (see the phantom line in FIG. 6, FIG. 10) that bulges into the extraction cylinder 12 into the inner cylinder portion 29. Since the concave shape (see the solid line in FIG. 6, see FIG. 8) is greatly deformed, most of the content liquid 6 in the dispensing cylinder 12 is deformed along with the deformation of the first valve body 33. It is drawn into the part 29. Thereby, the residual amount of the content liquid 6 remaining in the dispensing cylinder 12 after the first valve body 33 is closed can be reduced, or the content liquid 6 can remain in the dispensing cylinder 12. The suction back effect with respect to the content liquid 6 is exhibited.
Even when the content liquid 6 remains in the dispensing cylinder 12, the remaining amount is reduced as described above, so the lid 14 is closed and the protrusion 54 is inserted into the dispensing cylinder 12. At this time, it is possible to prevent the content liquid 6 remaining in the dispensing cylinder 12 from overflowing to the outside of the dispensing cylinder 12.

  Also, the double container 1 is not pressed, and the outer container 3 is not deformed in a normal state (the pressing operation of the double container 1 is released and the outer container 3 is restored to the original shape before the pressing operation. 8), since the content liquid 6 has returned from the introduction portion 41 into the inner container 2, the second valve body 42 is deformed to the open position O2, and the intake port 23 is kept open.

  Thereby, for example, even if the inside of the double container 1 becomes hotter than the outside and the air between the inner container 2 and the outer container 3 is thermally expanded, the thermally expanded air is sucked from the communication channel 38. It flows out to the mouth 23 and is discharged to the outside from the air inlet 23. Thereby, in the said normal time, the pressure in the double container 1 and an external pressure balance. Accordingly, the air in the space 37 between the inner container 2 and the outer container 3 is thermally expanded, the pressure in the double container 1 rises, and the double container 1 is not pressed, It is possible to prevent the liquid level of the content liquid 6 from rising.

  Further, when the outer container 3 is deformed by pressing (squeezing) the double container 1, a second pressing force is weakened to reduce the deformation amount of the outer container 3, as shown in FIG. With the flow hole 36 closed, the content liquid 6 can be poured out only from the first flow hole 35. In this case, the content liquid 6 poured out from the pouring cylinder 12 is kept in a small amount. Further, by increasing the pressing force and increasing the deformation amount of the outer container 3, the content liquid 6 is poured out from both the first circulation hole 35 and the second circulation hole 36 as shown in FIG. 10. In this case, the content liquid 6 poured out from the dispensing cylinder 12 increases and becomes a large amount. In this way, by adjusting the pressing force when the double container 1 is pressed, the amount of the content liquid 6 poured out from the dispensing cylinder 12 can be adjusted.

DESCRIPTION OF SYMBOLS 1 Double container 2 Inner container 3 Outer container 4 Mouth part 5 Cap 6 Contents liquid 11 Cap main body 12 Outlet cylinder 13 Outlet 14 Lid 15 Inner plug 23 Inlet 29 Inner cylinder part 30 Other end opening part 31 1st inside Valve 32 Second internal valve 33 First valve body 35 First flow hole 36 Second flow hole 37 Between inner container and outer container 38 Communication flow path 41 Introducing section 42 Second valve body 50 Communication path 51 Closing member A1 Closing direction A2 Opening direction O1, O2 Open position S1, S2 Closed position

Claims (5)

A cap attached to the mouth of a double container having a deformable inner container and an outer container,
A cap body fitted on the mouth of the double container;
A dispensing tube provided on the cap body;
A lid that opens and closes the spout opening at the tip of the pour tube;
An inner cap provided inside the cap body and fitted into the mouth of the double container;
A first internal valve provided inside the cap body,
The inner plug has an inner cylinder portion whose one end communicates with the inside of the inner container and the other end communicates with the inside of the dispensing tube,
The first internal valve has a first valve body that covers the other end opening of the inner cylinder,
A flow hole is formed in the first valve body;
The first valve body can be deformed into an open position that bulges into a convex shape in the dispensing cylinder and a closed position that retreats into a concave shape in the inner cylinder portion, and is biased in the closing direction. ,
When the first valve body is in the closed position, the inside of the inner cylinder portion and the inside of the extraction cylinder are blocked by the first valve body,
A cap characterized in that when the first valve body is in the open position, the inside of the inner cylinder portion and the inside of the extraction cylinder communicate with each other through the flow hole of the first valve body. The flow hole has a first flow hole formed in the center of the first valve body,
The inner cylinder portion has a communication path communicating with the inside of the inner container and the inside of the extraction cylinder, and a closing member inside.
When the first valve body is in the closed position, the first valve body comes into contact with the closing member, and the first flow hole is closed with the closing member,
When the first valve body is in the open position, the first valve body is separated from the closing member, and the inside of the inner cylinder portion and the inside of the extraction cylinder communicate with each other through the first flow hole. The cap according to claim 1. The flow hole has a plurality of second flow holes formed around the first flow hole,
When the first valve body is in the closed position, the first valve body comes into contact with the other end portion of the inner cylinder portion, and the second flow hole is closed at the other end portion of the inner cylinder portion,
When the first valve body is in the open position, the first valve body is separated from the other end portion of the inner cylinder portion, and the first and second flow holes are formed between the inner cylinder portion and the extraction cylinder. The cap according to claim 2, wherein the cap communicates with each other. The cap body is formed with an intake port for sucking outside air between the inner container and the outer container,
Inside the cap body, a communication channel that communicates between the air inlet and the inner container and the outer container, and a second internal valve that opens and closes the air inlet,
The cap according to any one of claims 1 to 3, wherein the second internal valve is formed integrally with the first internal valve. The second internal valve has an introduction part that introduces the content liquid of the inner container, and a second valve body that opens and closes by the content liquid introduced into the introduction part,
The second valve body can be deformed into a closed position that bulges into the intake port and closes the intake port, and an open position that retracts from the intake port to the introduction portion and opens the intake port, and is biased in the opening direction. The cap according to claim 4, wherein the cap is deformed from the open position to the closed position by the content liquid introduced into the introduction portion.