JP6358876B2 - Foam ejection container - Google Patents

Description

  The present invention relates to a foam ejection container that squeezes a body portion of a container body to mix a liquid content contained in the container body with air and eject the foam from a nozzle.

  As a container for storing liquids such as shampoos, body soaps, hand soaps, facial cleansers, etc. A foam ejection container in which a liquid is mixed with air and ejected from a nozzle in the form of foam is often used.

  In such a bubble ejection container, a mixing chamber for mixing the content liquid with air is provided in the discharge flow path of the content liquid, and a foaming member made of, for example, a mesh is incorporated downstream of the mixing chamber, so that the body portion of the container body Squeezing out, the content liquid is mixed with air, the foamed member is allowed to pass and foamed into a foam, and ejected from the nozzle.

  On the other hand, in order to prevent the foam-like content liquid remaining inside the nozzle after use from liquefying over time and dripping from the tip of the nozzle as a foam ejection container as described above, a so-called suck back function is provided. It is known to have it.

  For example, in Patent Document 1, a return flow path that communicates the nozzle and the container main body is provided between the nozzle and the container main body in addition to the discharge flow path, and the content liquid directed from the inside of the container main body to the nozzle is provided in the return flow path. A check valve is provided that restricts the flow of the liquid and allows the flow of the content liquid from the nozzle into the container body, so that the content liquid remaining in the nozzle due to the negative pressure generated in the container body when the squeezing is released. There is described a foam ejection container adapted to be pulled back into the container body through a return channel.

JP 2014-46938 A

  In the conventional bubble ejection container, when the container is turned sideways or upside down when not in use, the internal solution in the container body may leak from the nozzle through the discharge flow path and the return flow path. Therefore, in order to prevent the liquid content from leaking out of the nozzle even when the container is turned sideways or upside down, the flow path between the nozzle and the container body can be closed when the nozzle head is not used by rotating the nozzle head. It is conceivable to have a configuration.

  However, in such a configuration, when the internal pressure in the container body rises due to some factor such as a temperature rise in a state where the flow path between the nozzle and the container body is closed, the return flow path is non-returned by the internal pressure. Since it is blocked by the valve, when the nozzle head is rotated during use to open the flow path between the nozzle and the container main body, the internal solution in the container main body is pumped to the discharge flow path by the internal pressure. There was a risk of leakage from the nozzle tip.

  An object of the present invention is to solve such a point, and the object of the present invention is to use the flow path in use even when the flow path is closed between the nozzle and the container body when not in use. An object of the present invention is to provide a foam ejection container in which the internal solution in the container body does not leak outside from the nozzle due to the internal pressure when is opened.

The foam ejection container of the present invention includes a flexible body, and includes a container main body in which the content liquid is accommodated and a content liquid discharge port and a return port. A nozzle cap connected to the mounting cap; and a nozzle connected to the discharge port and the return port; and a nozzle head mounted on the mounting cap so as to be movable up and down between an open position and a closed position; and the nozzle head A discharge port opening / closing portion that is provided and closes the discharge port when the nozzle head is in a closed position and opens the discharge port when the nozzle head is in an open position; and the nozzle head, A return port opening / closing portion that closes the return port when the nozzle head is in the closed position and opens the return port when the nozzle head is in the open position; and a mixing chamber that is provided in the mounting cap and that is connected to the discharge port. And having the mixing chamber A partition portion provided on the bottom of the air inlet and the liquid inlet Tsuraneru the serial receiving space, to the mounting cap and an outer cylindrical portion which is integrally connected by a connecting portion to the inner cylindrical portion and the inner cylindrical portion The return port on the inner surface of the mounting cap is opposed to the seal surface opened by a predetermined interval, and the return port is disposed between the outer peripheral surface of the outer cylindrical portion and the inner peripheral surface of the mounting cap. A support piece that defines an internal pressure relief passage that communicates with the housing space, and a width in the radial direction of an upper surface that faces the seal surface rather than a lower surface that has a cross section perpendicular to the circumferential direction that faces the support piece Has a narrow trapezoidal shape and is formed in a plate shape thinner than the interval between the seal surface and the support piece, and freely moves between the seal surface and the support piece in a direction approaching or separating from the seal surface. And a valve body that can be arranged, In the normal state where the container body is in a standing posture and the body portion is not squeezed, the valve body is supported by the support piece in a state spaced from the seal surface, and the return port is opened, When the internal pressure of the container body becomes a predetermined value or more, the valve body is pressed against the seal surface by the internal pressure, and the return port is closed.

  According to the present invention, in the above configuration, the return port is formed in an arc shape centered on the axis of the discharge port, and the valve body is formed in an annular shape centering on the axis of the discharge port. Is preferred.

  In the above-described configuration, the present invention is provided in the return port opening / closing part, and abuts on the upper surface of the valve body when the nozzle head moves from the open position toward the closed position, thereby separating the valve body from the seal surface. It is preferable to have a push-down portion that pushes down the

  According to the present invention, even when the internal pressure of the container main body rises with the nozzle head in the closed position, when the nozzle head is moved from the closed position to the open position in use, the valve body is separated from the sealing surface. Since the return port is open, the internal pressure can be released to the outside through the return port. Thereby, it can prevent that the internal solution in a container main body leaks outside from a nozzle through a discharge port by internal pressure. On the other hand, when the body portion of the container body is squeezed and the content liquid is ejected from the nozzle, the internal pressure of the container body becomes a predetermined value or more due to the squeezing, so that the valve body is pressed against the sealing surface and the return port is closed. Therefore, the content liquid accommodated in the accommodating space of the container body can be ejected from the nozzle to the outside through the discharge port.

  Therefore, according to the present invention, even when the flow path is closed between the nozzle and the container main body when not in use, the internal solution in the container main body is caused by the internal pressure when the flow path is opened during use. It is possible to provide a foam ejection container that does not leak from the nozzle to the outside.

It is sectional drawing in the state in which the nozzle head was made into the open position of the foam ejection container which is one embodiment of this invention. It is sectional drawing in the state in which the nozzle head was made into the closed position of the foam ejection container shown in FIG. It is sectional drawing which shows the state of a non-return valve when pressing the trunk | drum of a container main body and ejecting a content liquid from a nozzle. It is sectional drawing which shows the state of a non-return valve when moving a nozzle head from a closed position to an open position.

  Hereinafter, the present invention will be described in detail with reference to the drawings.

  The foam ejection container 1 which is one embodiment of the present invention shown in FIG. 1 is also called a squeeze foamer, and includes the contents of various liquid detergents such as shampoos, body soaps, hand soaps, facial cleansers, hair styling agents, etc. While containing a liquid, the said content liquid is ejected in foam form.

  The foam ejection container 1 includes a container body 10. The container main body 10 includes a cylindrical mouth portion 11 having an upper opening and a body portion 12 connected to the mouth portion 11, and the inside thereof is a housing space S that contains the content liquid. The container body 10 is made of a synthetic resin, and its body part 12 has flexibility. By compressing (squeezing) the body part 12, the storage space S is reduced, and the inside of the container body 10 is added. Can be pressed.

  A mounting cap 20 is mounted on the mouth portion 11 of the container body 10. For example, the mounting cap 20 made of resin has a cylindrical outer peripheral wall 21 surrounding the mouth portion 11 of the container body 10, and a female screw portion 21 a provided on the inner peripheral surface of the outer peripheral wall 21 is the mouth portion 11. It is screwed and fixed to the mouth part 11 of the container main body 10 by screwing to a male screw part 11 a provided on the outer peripheral surface of the container body 10. A seal cylinder portion 22 is provided coaxially and integrally on the inner side of the outer peripheral wall 21, and the seal cylinder portion 22 is fitted inside the mouth portion 11, whereby a fitting portion between the mounting cap 20 and the mouth portion 11 is sealed. As a result, liquid leakage from the portion is prevented.

  A small protrusion 11b and a large protrusion 11c are provided at the base of the mouth portion 11 with an interval in the circumferential direction, and a detent rib 21b corresponding to the protrusions 11b and 11c is provided at the lower end portion of the outer peripheral wall 21. It has been. When the mounting cap 20 is screwed into the mouth portion 11, just before the screwing is finished, the rotation-preventing rib 21b gets over the small projection 11b and is disposed between the small projection 11b and the large projection 11c. 11 is held against rotation.

  In the illustrated case, the mounting cap 20 is fixed to the mouth portion 11 of the container body 10 by screw connection, but the mounting cap 20 may be fixed to the mouth portion 11 of the container body 10 by undercutting. it can.

  The top wall 23 of the mounting cap 20 is integrally provided with a cylindrical flow tube portion 24 that protrudes upward on the inner side of the seal tube portion 22. A cylindrical return tube portion 25 is coaxially and integrally provided inside the circulation tube portion 24 of the mounting cap 20, and a cylindrical discharge tube portion 26 is coaxially and integrally provided inside the return tube portion 25. Is provided.

  The top wall 23 of the mounting cap 20 is cut out in an arc shape centering on the axis of the mouth portion 11 and the outer peripheral wall 21 between the flow tube portion 24 and the return tube portion 25. Thereby, an arcuate return port 27 centering on the axis of the mouth portion 11 and the outer peripheral wall 21 is formed between the flow tube portion 24 and the return tube portion 25. The return port 27 communicates the storage space S of the container body 10 with the outer portion of the mounting cap 20 and functions as a return flow path for the content liquid from the nozzle toward the storage space S of the container body 10. Further, the inside of the discharge cylinder portion 26 is a discharge port 28 for the content liquid.

  The discharge cylinder portion 26 of the mounting cap 20 extends downward from the top wall 23, and a partition member 29 as a partition portion is attached to the extended portion.

  For example, the partition member 29 made of resin includes a cylindrical main body portion 29a having an inner diameter corresponding to the outer diameter of the discharge cylinder portion 26, and a hole forming portion 29b fitted and fixed to the lower end of the main body portion 29a. It is formed in a bottomed cylindrical shape, and the inside (inside) thereof is a mixing chamber 29c. The hole forming portion 29b defines an air inlet 29d and a liquid inlet 29e in the lower end opening of the main body 29a. The air introduction port 29d allows the mixing chamber 29c to communicate with the inside of the container main body 10 (accommodating space S), so that the air in the container main body 10 can be introduced into the mixing chamber 29c. On the other hand, a tube 30 extending to the bottom of the container body 10 is connected to the liquid introduction port 29e, and the liquid introduction port 29e places the mixing chamber 29c inside the container body 10 (the accommodation space S) via the tube 30. The content liquid in the container main body 10 can be introduced into the mixing chamber 29 c through the tube 30 in communication.

  The hole forming portion 29b is integrally provided with an umbrella-like body 29f for suppressing intrusion of the content liquid from the air introduction port 29d.

  A pair of foam members 31 are mounted inside the discharge cylinder portion 26 so as to be located on the upper side (downstream side) of the mixing chamber 29c. As these foaming members 31, for example, those having a structure in which a mesh is fixed to the end face of the ring are used, and in the posture in which each mesh is directed to the opposite side, the discharge cylinder portion 26 is axially spaced from each other. The fitting is fixed. The foaming member 31 is not limited to a structure having a ring and a mesh, and various structures can be used according to the type of the content liquid. Also, the number of foam members 31 can be variously changed according to the type of the content liquid.

  A nozzle head 40 is mounted on the mounting cap 20. The nozzle head 40 has a nozzle 41, and the nozzle 41 communicates with the discharge port 28 and the return port 27 of the mounting cap 20 and opens to the outside. The content liquid foamed through the foaming member 31 is discharged from the discharge port 28 and ejected to the outside from the opening 41 a of the nozzle 41. In addition, although the opening 41a of the nozzle 41 can be made into the substantially elliptical shape as shown in FIG. 2, other shapes may be sufficient as it.

  For example, the nozzle head 40 made of resin has a cylindrical mounting tube portion 42 having an inner diameter corresponding to the outer diameter of the flow tube portion 24, and the mount tube portion 42 slides outside the flow tube portion 24. It is attached to the attachment cap 20 by being movably fitted. With such a configuration, the nozzle head 40 can move up and down between the open position shown in FIG. 1 and the closed position shown in FIG. 2 with respect to the mounting cap 20. The vertical direction is a direction along the axis of the mouth portion 11 of the container body 10.

  On the outer peripheral surface of the flow tube portion 24 and the inner peripheral surface of the mounting tube portion 42, annular stopper protrusions 24 a and 42 a extending in the circumferential direction are provided, and the stopper protrusions 24 a and 42 a are engaged with each other, The stroke end on the open position side of the nozzle head 40 is defined. The stroke end on the closed position side of the nozzle head 40 is defined by the lower end of the mounting cylinder portion 42 of the nozzle head 40 coming into contact with the upper surface of the top wall 23 of the mounting cap 20.

  The nozzle head 40 is integrally provided with a discharge port opening / closing part 43. The discharge opening / closing part 43 is formed in a cylindrical shape, and is provided coaxially with the mounting cylinder part 42 inside the mounting cylinder part 42. The outer diameter of the outlet opening / closing part 43 is equal to the inner diameter of the outlet 28. The discharge port opening / closing part 43 is fitted inside the discharge port 28 when the nozzle head 40 is in the closed position to close the discharge port 28 (as shown in FIG. 2), and when the nozzle head 40 is in the open position. It moves above the discharge port 28 to open the discharge port 28 (state shown in FIG. 1).

  The nozzle head 40 is integrally provided with a return opening / closing part 44. The return port opening / closing part 44 is formed in a cylindrical shape, and is provided coaxially between the mounting cylinder part 42 and the discharge port opening / closing part 43. The outer diameter of the return port opening / closing part 44 is equivalent to the inner diameter of the flow cylinder part 24, and the inner diameter dimension is equivalent to the outer diameter of the return cylinder part 25. When the nozzle head 40 is in the closed position, the return port opening / closing portion 44 is disposed in the gap between the flow tube portion 24 and the return tube portion 25 to close the gap, that is, the return port 27 (the state shown in FIG. 2). When the head 40 is in the open position, the head 40 moves upward from between the flow tube portion 24 and the return tube portion 25 to open the return port 27 (the state shown in FIG. 1).

  A support piece 50 is provided inside the mounting cap 20. In the illustrated case, the support piece 50 has an inner cylindrical portion 51 and an outer cylindrical portion 52, and is formed integrally with the partition member 29. The inner cylindrical portion 51 is configured by the upper end portion of the main body portion 29 a of the partition member 29. On the other hand, the outer cylindrical portion 52 is formed in a cylindrical shape coaxial with the inner cylindrical portion 51, and is integrally connected to the inner cylindrical portion 51 by a plurality of connecting portions 53 and arranged outside the inner cylindrical portion 51.

  The portion of the inner surface of the top wall 23 of the mounting cap 20 where the return port 27 opens is a seal surface 54, and the upper end portion of the inner cylindrical portion 51 faces the seal surface 54 with a predetermined interval. Yes. Similarly, the upper end portion of the outer cylindrical portion 52 faces the seal surface 54 of the mounting cap 20 with a predetermined interval. Further, a gap is provided between the outer peripheral surface of the outer cylindrical portion 52 and the inner peripheral surface of the mounting cap 20, and this gap serves as an internal pressure relief passage 55.

  Between the sealing surface 54 and the support piece 50, the valve body 60 formed in the plate shape thinner than the space | interval of the sealing surface 54 and the support piece 50 is arrange | positioned. The valve body 60 can be made of, for example, synthetic rubber, silicone resin, soft polyethylene, or the like. In the illustrated case, the valve body 60 is formed in an annular shape centering on the axis of the discharge port 28 corresponding to the arc-shaped return port 27. The inner diameter of the valve body 60 is larger than the outer diameter of the discharge cylinder portion 26 and smaller than the outer diameter of the main body portion 29 a of the partition member 29, and the outer diameter of the valve body 60 is outside the outer cylindrical portion 52. It is equivalent to the diameter. Accordingly, the valve body 60 is supported on the inner cylindrical portion 51 at the inner edge side portion and supported on the outer cylindrical portion 52 at the outer edge side portion, and is spaced from the seal surface 54. It is arranged between the sealing surface 54 and the support piece 50. Further, the valve body 60 is not fixed with respect to the mounting cap 20, so that it can freely move in the direction of approaching / separating the seal surface 54 between the seal surface 54 and the support piece 50. It has become.

  The cross section perpendicular to the circumferential direction of the valve body 60 has a trapezoidal shape with a narrower radial width on the upper surface facing the seal surface 54 than on the lower surface facing the support piece 50. Thereby, the clearance gap between the corner | angular part of the outer periphery upper side of the valve body 60 and the inner corner | angular part of the mounting | wearing cap 20 can be enlarged, and the internal pressure relief passage 55 can be connected with the return port 27 reliably.

  In a normal state in which the container body 10 is in an upright posture and the body portion 12 is not squeezed, the valve body 60 is supported by the support piece 50 with a space from the seal surface 54. Accordingly, in the normal state, the return port 27 is opened without being closed by the valve body 60, and the accommodation space S of the container body 10 is communicated with the return port 27 via the internal pressure relief passage 55. On the other hand, when the body portion 12 of the container body 10 is squeezed and the pressure in the storage space S, that is, the internal pressure of the container body 10 exceeds a predetermined value, the valve body 60 is pushed upward by the internal pressure to seal the sealing surface. 54 is pressed to close the return port 27. Further, when the squeezing of the body portion 12 is released, the pressure of the accommodation space S of the container body 10 is reduced, and the valve body 60 falls downward due to its own weight and is open with an interval from the seal surface 54. Return to. As described above, the valve body 60 regulates the flow of air and content liquid from the accommodation space S of the container body 10 through the return port 27 to the nozzle 41 when the body part 12 is compressed, while the body part 12 is compressed. When is released, it functions as a check valve that allows the flow of air and content liquid from the nozzle 41 to the accommodation space S of the container body 10 through the return port 27.

  The shape and weight of the valve body 60 and the flow area of the internal pressure relief passage 55 are not closed by the increase in the internal pressure of the container body 10 due to an increase in temperature or the like. Therefore, the body portion 12 is set to be closed depending on the increase of the internal pressure caused by the squeezing.

  An annular seal protrusion 61 that protrudes downward can also be provided on each of the inner peripheral side and the outer peripheral side of the seal surface 54 across the return port 27. By providing the seal protrusion 61, the closing property of the return port 27 by the valve body 60 can be enhanced.

  A push-down portion 62 is integrally provided at the lower end of the return opening / closing portion 44. The push-down portion 62 is formed in a plate shape that is thinner than the radial interval between the flow tube portion 24 and the return tube portion 25 and narrower in the circumferential direction than the arcuate return port 27. It protrudes downward from the lower end of 44 and is inserted between the flow tube portion 24 and the return tube portion 25. As shown in FIG. 2, when the nozzle head 40 is in the closed position, the push-down portion 62 contacts the upper surface of the valve body 60 and moves away from the position where the valve body 60 contacts the support piece 50, that is, the seal surface 54. Can be held in position.

  Next, the usage method of the foam ejection container 1 of such a structure is demonstrated.

  As shown in FIG. 1, when the nozzle head 40 is pulled upward with respect to the mounting cap 20 to the open position, the discharge port 28 and the return port 27 are opened, and the foam ejection container 1 is squeezed (squeezed) of the trunk portion 12. ) To enable the ejection of the content liquid.

  In the state where the nozzle head 40 is in the open position, the foam-like content liquid can be ejected from the opening 41 a of the nozzle 41 by squeezing the body portion 12 of the container body 10. That is, when the body portion 12 is squeezed, as shown in FIG. 3, the pressure in the accommodation space S, that is, the internal pressure of the container body 10 rises to a predetermined value or more, and the valve body 60 is applied to the seal surface 54 by the internal pressure. The return port 27 is closed by being pressed. Then, the body portion 12 is further squeezed while the return port 27 is closed by the valve body 60, so that the content liquid accommodated in the accommodation space S of the container main body 10 passes through the tube 30 from the liquid introduction port 29 e. While being introduced into the mixing chamber 29c, the air in the container body 10 is introduced into the mixing chamber 29c through the air introduction port 29d, and the content liquid is mixed with air inside the mixing chamber 29c to be foamed and foamed. The The foamed content liquid passes through the foaming member 31, reaches the nozzle 41 through the discharge port 28 while being further foamed and foamed, and is jetted out from the opening 41 a of the nozzle 41 to the outside. .

  When the squeezing of the body portion 12 is released after the content liquid is ejected, the pressure in the storage space S of the container body 10 decreases, and the valve body 60 falls downward due to its own weight, leaving an interval with respect to the sealing surface 54. It returns to the open state (state shown in FIG. 1). In addition, a negative pressure is generated in the container body 10 by restoring the body portion 12 to the original shape, and the air (outside air) in which the content liquid remaining inside the nozzle 41 is sucked from the nozzle 41 by this negative pressure. At the same time, it is drawn into the container body 10 through the return port 27 and the discharge port 28. By such a function, also called a suck back function, the content liquid remaining inside the nozzle 41 after the ejection is drawn into the container body 10 together with the air, and the content liquid drips outside from the opening 41a of the nozzle 41. Can be prevented.

  On the other hand, when not in use or the like, as shown in FIG. 43 and the return opening / closing part 44 are closed to block the flow path between the nozzle 41 and the storage space S of the container main body 10, thereby making the foam ejection container 1 unusable.

  As described above, in this foam ejection container 1, by simply operating the nozzle head 40 from the open position to the closed position, the foam ejection container 1 is made unusable and the body 12 is not used when not in use. Even if it is squeezed unexpectedly, the liquid in the container body 10 can be reliably prevented from leaking outside through the nozzle 41.

  By the way, as described above, the foam ejection container 1 has a configuration in which the flow path between the nozzle 41 and the accommodation space S of the container body 10 can be blocked by setting the nozzle head 40 to the closed position. When the container body 10 is warmed due to an increase in temperature, the internal pressure in the container body 10 may increase. If the nozzle 41 is opened while the internal pressure is increased in this way, the content liquid in the container body 10 may be pumped from the discharge port 28 toward the nozzle 41 due to the internal pressure, and leak from the opening 41a of the nozzle 41 to the outside. There is. However, in this foam ejection container 1, when opening the nozzle 41, the internal pressure is released to the outside as described below, and the liquid in the container body 10 is prevented from leaking from the tip of the nozzle 41 to the outside. Can do.

  That is, in the foam ejection container 1 of the present invention, the valve body 60 is configured to close the return port 27 by squeezing the body portion 12 but not to close the return port 27 due to an increase in internal pressure due to an increase in temperature or the like. Therefore, as shown in FIG. 4, when the nozzle head 40 is moved from the closed position toward the open position, the valve body 60 is supported by the support piece 50 in a state of being spaced from the seal surface 54. The return port 27 is supported and opened. Therefore, when the nozzle head 40 is pulled upward with respect to the mounting cap 20, the internal pressure is released to the outside through the internal pressure relief passage 55, the return port 27, and the nozzle 41, and the content liquid in the storage space S is discharged. It is not fed to the nozzle 41 through the discharge port 28.

  Thus, in this foam ejection container 1, even when the internal pressure of the container main body 10 rises with the nozzle head 40 in the closed position, the nozzle head 40 is moved from the closed position toward the open position in use. When opening 41, the valve body 60 is separated from the sealing surface 54 and the return port 27 is opened, so that the internal pressure can be released from the nozzle 41 to the outside through the return port 27. Thereby, it can prevent that the internal solution in the container main body 10 leaks outside from the nozzle 41 through the discharge port 28 by internal pressure.

  On the other hand, the valve body 60 is configured to be pressed against the seal surface 54 by the pressure increase in the accommodation space S due to the squeezing of the body portion 12 and close the return port 27. When the body 12 is squeezed while releasing the internal pressure of the container body 10 when opened, it functions as a check valve, closes the return port 27, and ejects the content liquid in the storage space S from the nozzle 41 to the outside through the discharge port 28. Can be made.

  By the way, when the container body 10 contains, for example, a liquid containing a surfactant as the content liquid, the content liquid may cause the valve body 60 to adhere to the seal surface 54 and the return port 27 may not be opened. There is. However, in this foam ejection container 1, since the push-down portion 62 is provided at the lower end of the return port opening / closing portion 44, the push-down portion 62 is moved to the closed position by moving the nozzle head 40 from the open position to the closed position. The valve body 60 can be pushed down in a direction away from the sealing surface 54 by contacting the upper surface of the body 60. Accordingly, even when the valve body 60 is fixed to the seal surface 54, the valve head 60 is moved away from the seal surface 54 by the push-down portion 62 by moving the nozzle head 40 to the closed position. Can be eliminated.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  For example, in the above embodiment, the return port 27 is formed in an arc shape and the valve body 60 is formed in an annular shape. However, the shape of the return port 27 and the shape of the valve body 60 are not limited thereto. It can be changed.

  In addition, the air inlet 29d and the liquid inlet 29e provided in the partition member 29 can have various configurations as long as they have the functions.

DESCRIPTION OF SYMBOLS 1 Foam ejection container 10 Container main body 11 Portion | piece part 11a Male thread part 11b Small protrusion 11c Large protrusion 12 Trunk part 20 Mounting | wearing cap 21 Outer peripheral wall 21a Female thread part 21b Anti-rotation rib 22 Seal cylinder part 23 Top wall 24 Distribution | circulation cylinder part 24a Stopper protrusion 25 Return tube portion 26 Discharge tube portion 27 Return port 28 Discharge port 29 Partition member 29a Main body portion 29b Hole forming portion 29c Mixing chamber 29d Air introduction port 29e Liquid introduction port 29f Umbrella 30 Tube 31 Foaming member 40 Nozzle head 41 Nozzle 41a Opening 42 Installation cylinder part 42a Stopper protrusion 43 Discharge port opening / closing part 44 Return port opening / closing part 50 Supporting piece 51 Inner cylindrical part 52 Outer cylindrical part 53 Connecting part 54 Seal surface 55 Internal pressure relief passage 60 Valve element 61 Seal protrusion 62 Pushing part S Accommodating space

Claims (3)

A container body having a flexible barrel, the inside of which is a storage space for the content liquid;
A mounting cap mounted on the mouth portion of the container body, comprising a discharge port and a return port for the content liquid;
A nozzle head that includes a nozzle connected to the discharge port and the return port, and is mounted on the mounting cap so as to be movable up and down between an open position and a closed position;
A discharge port opening / closing part provided in the nozzle head, closing the discharge port when the nozzle head is in a closed position, and opening the discharge port when the nozzle head is in an open position;
A return port opening / closing part provided in the nozzle head, closing the return port when the nozzle head is in a closed position, and opening the return port when the nozzle head is in an open position;
A partition section provided in the mounting cap and having a mixing chamber connected to the discharge port and having an air inlet and a liquid inlet at the bottom connecting the mixing chamber to the storage space;
An inner cylindrical portion and an outer cylindrical portion integrally connected to the inner cylindrical portion by a connecting portion are provided on the mounting cap, and a predetermined interval is provided between the sealing surface where the return port of the inner surface of the mounting cap opens. And a support piece that defines an internal pressure relief passage that communicates the return port and the accommodation space between the outer peripheral surface of the outer cylindrical portion and the inner peripheral surface of the mounting cap .
The upper surface facing the seal surface side has a trapezoidal shape with a narrower radial width than the lower surface facing the support piece side, and the interval between the seal surface and the support piece. Is also formed in a thin plate shape, and has a valve body disposed between the seal surface and the support piece so as to be freely movable in a direction approaching / separating the seal surface,
In the normal state where the container body is in a standing posture and the body portion is not squeezed, the valve body is supported by the support piece in a state spaced from the seal surface, and the return port is opened,
A foam ejection container, wherein when the internal pressure of the container body becomes equal to or higher than a predetermined value, the valve body is pressed against the seal surface by the internal pressure and the return port is closed.     The bubble ejection according to claim 1, wherein the return port is formed in an arc shape centered on the axis of the discharge port, and the valve body is formed in an annular shape centering on the axis of the discharge port. container.   Provided in the return port opening and closing portion, and having a push-down portion that abuts the upper surface of the valve body and pushes the valve body away from the sealing surface when the nozzle head moves from the open position toward the closed position. The foam ejection container according to claim 1 or 2.

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