JP2015093724A - Double container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a double container which reduces an amount of a content remaining in an inner container.SOLUTION: The double container includes: an inner container 10 which stores a content having fluidity and may deform; an outer container 20 housing the inner container 10; a pump 30 which is attached to the inner container 10 and discharges the content; and an adapter 50 which is attached to the pump 30 and secures a passage 60 of the content around a suction port 36 of the pump 30 when the inner container 10 is deformed by discharging the content. Even if the inner container 30 is deformed, the adapter 50 prevents inner surfaces of a wall part of the inner container 10 from completely adhering to each other.

Description

  The present invention relates to a double container that stores fluid contents and discharges the contents by a user operating a pump.

  2. Description of the Related Art Conventionally, there is known a double container that stores fluid contents such as milky cosmetics and discharges the contents by a user operating a pump (see, for example, Patent Document 1). ). The double container is mainly composed of an inner container, an outer container, and a pump. Even if a double container operates a pump and discharges the contents, outside air is not introduced into the inside of the inner container. The inner container is deformed in accordance with the discharge of the contents, and the volume of the inner container is reduced. For this reason, the oxidation of the content by the introduction of outside air, contamination by various germs, and the like can be suppressed.

  In the double container disclosed in Patent Document 1, when the contents are discharged and the volume of the contents decreases, the inner container formed of a film is crushed and deformed at atmospheric pressure, and the inner container The inner surfaces of the wall portions are in close contact with each other. When the inner surfaces of the wall portions of the inner container are in close contact with each other, there is a problem that the contents cannot be discharged by the pump and the contents remain on the bottom of the inner container. This is because when the inner container is crushed and deformed at atmospheric pressure, the inner surfaces of the wall portions of the inner container closely contact each other around the suction port of the pump to close the suction port of the pump, or the suction port of the pump and the inner container It is considered that the inner surfaces of the wall portions of the inner container are in close contact with the bottom portion of the inner container to block the passage of the contents.

  Patent Document 2 discloses a double container in which a rib strip that restricts the deformation of the inner container with a thin structure to a fixed form is formed on a thin-walled body. The double container of Patent Document 2 is a technology that attempts to secure a gap between the contents and the suction port of the pump by regulating the crushing deformation of the inner container to a certain form by a rib strip. However, it is difficult to always make the inner container flat in a constant form. For this reason, the gap may not be secured depending on the form of the inner container being crushed and the contents may remain in the inner container.

  In addition, the double container is required to have various designs and different sizes so as to suit the consumer's preference. On the other hand, there are relatively few pump options, and pumps with the same cylinder diameter may be used for double containers of different designs and sizes. For this reason, in a state where the pump is mounted on the neck of the inner container, a space is generated between the neck of the inner container and the cylinder of the pump, and the contents may enter the space. The contents entering this space are difficult to discharge with a pump, which is one of the causes of the contents remaining.

  Moreover, what is called an airless pump is used as a pump for double containers. The airless pump is not formed with a vent hole in the cylinder so that outside air is not introduced into the inner container even if the contents are discharged by operating the pump. On the other hand, a pump in which a vent hole for introducing outside air is formed in the cylinder is also known (hereinafter referred to as a pump with a vent hole). In general, airless pumps are less demanding than vented pumps, so airless pumps are more expensive than vented pumps. That is, there is a problem that the cost of the double container is increased by using an expensive airless pump.

Japanese Patent Laid-Open No. 2004-3007048 JP 2008-213854 A

The present invention has been made to solve the above problems.
The first object of the present invention is to provide a double container capable of reducing the amount of contents remaining in the inner container.
A second object of the present invention is to provide a double container that can reduce the amount of contents that enter and remain in the space between the inner container and the cylinder of the pump.
The third object of the present invention is to reduce the cost of the double container by enabling the use of a vented pump.

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

That is, the double container of the first invention includes an inner container, an outer container, a pump, and an adapter.
The inner container stores the fluid content and is deformable.
The outer container accommodates the inner container.
The pump is mounted on the inner container and discharges the contents.
The adapter is attached to the pump and secures a passage for the contents around the suction port of the pump when the inner container is deformed by the discharge of the contents.

The double container of the second invention is the double container of the first invention,
The adapter includes a passage forming portion disposed around the suction port of the pump.

The double container of the third invention is the double container of the first or second invention,
The adapter has a guide portion that extends from the vicinity of the suction port of the pump toward the bottom of the inner container.

The double container of the fourth invention is the double container of the third invention,
The passage forming portion has a plurality of passage forming pieces,
The guide unit has a plurality of guide pieces,
Each guide piece of the guide portion is formed continuously with each passage forming piece of the passage forming portion.

The double container of the fifth invention is the double container of any one of the first to fourth inventions,
The pump comprises a cylinder,
The inner container includes a neck portion into which a cylinder is inserted,
The adapter includes a holding portion that is fitted on the outside of the cylinder and disposed between the neck portion and the cylinder.

The double container of the sixth invention is the double container of any one of the first to fifth inventions,
The pump has a vent hole that can introduce outside air into the inner container,
The adapter is attached to the pump so as to close the vent hole.

  According to the present invention, even if the inner container is deformed, the adapter prevents the inner surfaces of the wall portions of the inner container from being completely adhered to each other. For this reason, the passage of the contents can be secured around the suction port of the pump, the contents can be discharged by the pump, and the amount of the remaining contents can be reduced.

The side view of the double container which concerns on embodiment of this invention. Sectional drawing which cut | disconnected the double container along the central axis. The top view of an inner container. The top view of an outer cover body. Side view of adapter Sectional drawing in the CC line of FIG. 4A. The side view of the double container in the state where the volume of the inner container decreased by discharge of the contents. Sectional drawing in the DD line of FIG. Sectional drawing in the EE line | wire of FIG.

  The double container 100 which is an example of embodiment of this invention is demonstrated using figures. First, the structure of the double container 100 will be described with reference to FIGS. 1 to 4B.

  As shown in FIGS. 1 and 2, the double container 100 is a container for storing fluid contents such as an emulsion cosmetic. A user operates the pump 30 of the double container 100 to discharge a necessary amount of contents. The double container 100 mainly includes an inner container 10, an outer container 20, a pump 30, and an adapter 50. A cover 29 is attached to the outer container 20. In the present embodiment, the inner container 10 and the outer container 20 are transparent. For this reason, as shown in FIG. 1, when the double container 100 is viewed from the side, the inner container 10 and the adapter 50 accommodated in the outer container 20 can be visually recognized. 1 to 6B, the contents are not shown.

  The inner container 10 is for storing contents. The inner container 10 is configured to be deformable. The inner container 10 has a hollow interior so that the contents can be stored. The inner container 10 mainly has an inner container body 11 and a neck 12. The inner container body 11 of the present embodiment is substantially cylindrical and has a side wall part 13, a bottom wall part 14, and a top wall part 15.

  As shown in FIGS. 2 and 3A, the neck 12 of the inner container 10 is a portion into which the pump 30 is inserted. The neck 12 is continuously formed on the top wall 15 of the inner container body 11. The free end side of the neck 12 has an opening 16 so that the contents can be filled and the pump 30 can be inserted. A male screw portion 17, a fixing hook portion 18, and a fixing protrusion 19 are formed on the outer peripheral surface of the neck portion 12. The fixing flange 18 and the fixing protrusion 19 are protrusions for connecting the inner container 10 and the outer container 20. The fixing flange 18 is formed in a hook shape around the entire outer peripheral surface of the neck 12. The fixing projection 19 is formed closer to the opening 16 than the fixing collar 18. A pair of fixing protrusions 19 are formed at positions on the outer peripheral surface of the neck 12 that face each other in the diameter direction of the neck 12.

  As described above, the inner container 10 is configured to be deformable. That the inner container 10 is deformable means that the inner container body 11 of the inner container 10 is in a state where the volume of the contents is reduced by discharging the contents and no outside air is introduced into the inner container 10. It can be crushed at atmospheric pressure in accordance with the discharge of. For example, by forming the side wall part 13, the bottom wall part 14 and the top wall part 15 constituting the inner container body 11 of the inner container 10 with a film-like synthetic resin material, or with a thin synthetic resin material, The inner container 10 can be made deformable. The inner container 10 can be molded by, for example, a blow molding method. As the synthetic resin material, polyethylene, polyester, polypropylene, or the like can be used.

  The outer container 20 is configured to accommodate the inner container 10. The outer container 20 includes an outer container main body 21 and an outer lid body 22. The outer container body 21 has a bottomed cylindrical shape, and a space for accommodating the inner container 10 is formed therein. The outer container body 21 has an opening 23, and a male screw part 24 is formed on the outer peripheral surface near the opening 23.

  As shown in FIGS. 2 and 3B, the outer lid body 22 is a member that closes the opening 23 of the outer container body 21 and holds the inner container 10 and the pump 30. On the inner peripheral surface of the outer lid body 22, a female screw portion 25 that is screwed with the male screw portion 24 of the outer container body 21 is formed. An insertion hole 26, a locking portion 27, and an insertion hole 28 are formed in the center of the outer lid body 22. The neck 12 of the inner container 10 is inserted through the insertion hole 26. The locking portion 27 engages with the fixing flange 18 and the fixing protrusion 19 of the inner container 10 to connect the inner container 10 and the outer lid body 22. The insertion hole 28 is a hole for inserting the fixing protrusion 19 of the inner container 10.

  The connection between the inner container 10 and the outer lid body 22 will be specifically described. As shown in FIGS. 3A and 3B, a pair of fixing protrusions 19 of the inner container 10 are formed at positions facing the diametrical direction of the neck 12 on the outer peripheral surface of the neck 12. A pair of locking portions 27 and insertion holes 28 of the outer lid body 22 are formed at positions corresponding to the fixing protrusions 19 of the inner container 10. When connecting the inner container 10 and the outer lid body 22, the fixing protrusion 19 is inserted into the insertion hole 28 while the neck 12 of the inner container 10 is inserted into the insertion hole 26 of the outer lid body 22. Subsequently, the inner container 10 and the outer lid body 22 are rotated relative to each other so that the locking portion 27 of the inner container 10 moves from the insertion hole 28 to the locking portion 27. Accordingly, the locking portion 27 of the outer lid body 22 engages with the fixing collar portion 18 and the fixing protrusion 19 of the inner container 10, and the inner container 10 and the outer lid body 22 are connected.

  In the present embodiment, a pump with a vent hole is used as the pump 30. A so-called airless pump generally used for a double container does not have a vent hole, but the pump 30 of this embodiment has a cylinder 32 with a vent hole 37 for introducing outside air into the inner container 10. Is formed. In the double container of the present invention, by using the adapter 50, not only an airless pump but also a pump with a vent hole can be used.

  The pump 30 of this embodiment mainly has an upper lid body 31, a cylinder 32, and a head 33. On the inner peripheral surface of the upper lid body 31, a female screw portion 34 that is screwed with the male screw portion 17 of the inner container 10 is formed. A pedestal 35 is formed at the lower end of the upper lid 31. When the upper lid body 31 is screwed into the inner container 10 with the outer lid body 22 connected to the inner container 10, the fixing collar portion 18 and the fixing projection 19 of the inner container 10 and the pedestal portion 35 of the upper lid body 31. Thus, the outer lid body 22 is sandwiched, and the inner container 10, the outer lid body 22, and the pump 30 can be reliably connected. The pedestal 35 of the upper lid 31 is not an essential configuration. It is only necessary that the connection state between the inner container 10 and the outer lid body 22 can be maintained by engaging the fixing collar portion 18 and the fixing projection 19 of the inner container 10 with the outer lid body 22.

  The cylinder 32 is fixed inside the upper lid body 31. A suction port 36 is formed at the free end of the cylinder 32. A vent hole 37 is formed on the side surface of the cylinder 32. Inside the cylinder 32, a stem valve 38, a piston valve 39, a ball 40, a spring 41, and the like are arranged. The head 33 includes a nozzle 42, a stem shaft 43, and the like, and is disposed on the upper cover body 31. In addition, since these structures are the same as those of a conventionally known vented pump, detailed description is omitted.

  As shown in FIGS. 4A and 4B, the adapter 50 is attached to the pump 30, and when the volume of the inner container 10 is reduced due to the deformation of the inner container 10 due to the discharge of the contents, the suction port 36 of the pump 30 is reduced. A passage 60 for the contents is secured around. The adapter 50 mainly includes a holding part 51, a passage forming part 52, and a guide part 53.

  As shown in FIG. 2, the holding portion 51 is a portion that is fitted on the outside of the cylinder 32 and disposed between the neck portion 12 of the inner container 10 and the cylinder 32. A holding hole 55 is formed inside the holding portion 51. The holding hole 55 is a hole for fitting the holding portion 51 to the outside of the cylinder 32. The inner diameter of the holding hole 55 is set so that the inner peripheral surface of the holding hole 55 is in close contact with the outer peripheral surface of the cylinder 32. The dimension of the holding part 51 in the height direction is set to a dimension that allows the holding part 51 to cover the vent hole 37 of the cylinder 32 in a state where the adapter 50 is fitted in the cylinder 32. Thereby, the holding part 51 can block | close the ventilation hole 37 of the cylinder 32 from the outer surface side in the state which fitted the holding part 51 in the cylinder 32. FIG. By fitting the adapter 50 into the cylinder 32, a pump with a vent hole can be used similarly to an airless pump.

  The outer diameter of the holding portion 51 is set so as to be in close contact with the inner peripheral surface of the neck portion 12 of the inner container 10. A flange 54 is formed on the holding portion 51. The flange 54 is locked to the opening 16 of the neck portion 12 in a state where the holding portion 51 is attached to the neck portion 12 of the inner container 10, and the adapter 50 is positioned with respect to the inner container 10. Note that the outer peripheral surface of the holding portion 51 does not necessarily need to be in close contact with the inner peripheral surface of the neck portion 12 of the inner container 10. For example, it is only necessary that the holding part 51 can substantially eliminate or reduce the space between the neck 12 of the inner container 10 and the cylinder 32 of the pump 30.

  The passage forming portion 52 is formed so as to be disposed around the suction port 36 of the pump 30 in a state where the adapter 50 is fitted in the cylinder 32. The passage forming part 52 prevents the inner surfaces of the side wall parts 13 of the inner container 10 from coming into close contact with each other when the inner container 10 is deformed by the discharge of the contents, and forms a space around the suction port 36 of the pump 30. To do. Further, a gap is formed in the passage forming part 52 so that the contents are supplied to the suction port 36 of the pump 30. In the present embodiment, the passage forming portion 52 includes three passage forming pieces 56 formed with respect to the holding portion 51. The three passage forming pieces 56 are arranged around the suction port 36 of the pump 30 in a state where the adapter 50 is fitted in the cylinder 32, and the contents can pass between a pair of adjacent passage forming pieces 56. A gap is formed. As a result, the contents are sucked into the suction port 36 of the pump 30 through the gap between the passage forming pieces 56. Further, when the inner container 10 is deformed and the volume of the inner container 10 is reduced, the side wall 13 of the inner container 10 contacts the passage forming piece 56, so that a space is secured around the suction port 36 of the pump 30. Then, a passage 60 for the contents is secured around the suction port 36 of the pump 30. In addition, the channel | path formation part 52 is not limited to the thing of this embodiment. For example, the number and shape of the passage forming pieces 56 are not limited to the present embodiment.

  The guide portion 53 extends from the vicinity of the suction port 36 of the pump 30 toward the bottom portion (bottom wall portion 14) of the inner container 10 with the adapter 50 fitted in the cylinder 32. In the present embodiment, the guide portion 53 includes three guide pieces 57 that are arranged radially from the center side of the inner container 10 toward the side wall portion 13. In the present embodiment, the position where each guide piece 57 is formed corresponds to each passage forming piece 56 of the passage forming portion 52. That is, each guide piece 57 of the guide portion 53 is formed continuously with each passage formation piece 56 of the passage formation portion 52. Thereby, when the inner container 10 is deformed by the discharge of the contents, the content passage 60 secured by the guide portion 53 and the content passage 60 secured by the passage formation portion 53 are easily continuous. That is, since each guide piece 57 and each passage forming piece 56 are continuously formed, the gap between the inner surfaces of the inner container 10 secured by the guide portion 53 and the passage forming portion 53 are secured. The gap between the inner surfaces of the inner container 10 is likely to continue. In addition, the guide part 53 is not limited to the thing of this embodiment. For example, the number and shape of the guide pieces 57 and the relative positions with respect to the passage forming pieces 56 are not limited to this embodiment. Moreover, the length of the guide part 53 can be changed. As shown in the present embodiment, the guide portion 53 may have a length where the tip is located near the bottom of the inner container 10 or may be shorter than this. When the tip of the guide portion 53 is located near the bottom of the inner container 10, the content passage 60 can be secured up to the vicinity of the bottom of the inner container 10.

  Next, the discharge operation and suction operation (pumping operation) of the pump 30 and the action of the adapter 50 will be described.

  First, the pumping operation of the pump 30 will be described. As shown in FIG. 2, in a state where the head 33 is not pressed, the head 33 and the stem valve 38 are located at the top dead center by the urging force of the spring 41. The ball 40 also closes the suction port 36 side of the cylinder 32 by the biasing force of the spring 41. The air hole 37 of the cylinder 32 is closed by the piston valve 39 and the holding portion 51 of the adapter 50. In the state of FIG. 2, it is assumed that the contents have already been sucked into the cylinder 32.

  When the head 33 is pressed against the urging force of the spring 41 from the state of FIG. 2, the stem shaft 43, the stem valve 38, and the piston valve 39 are lowered. The content sucked into the cylinder 32 moves from the gap formed between the stem valve 38 and the piston valve 39 toward the head 33 and is discharged from the nozzle 42. At this time, the air hole 37 on the side surface of the cylinder 32 is opened on the inner surface side by the movement of the piston valve 39, but is closed from the outer surface side of the cylinder 32 by the holding portion 51 of the adapter 50. Outside air is not introduced into the vessel 10.

  When the head 33 is released from the pressed state, the head 33, the stem shaft 43, the stem valve 38, and the piston valve 39 are lifted by the biasing force of the spring 41. The inside of the cylinder 32 becomes negative pressure as these rise, and the ball 40 closing the suction port 36 side of the cylinder 32 also moves upward. The contents of the inner container 10 are sucked from the suction port 36, pass through a gap generated between the cylinder 32 and the ball 40, and sucked into the cylinder 32.

  By repeating the pumping operation as described above, the content filled in the inner container 10 is discharged from the nozzle 42 and decreases. On the other hand, even if the contents are reduced, the outside air is not introduced into the inner container 10. For this reason, as shown in FIG. 5, the inner container 10 is deformed by the atmospheric pressure, and the volume of the inner container 10 decreases according to the discharge of the contents.

  5, 6A and 6B show a state in which the remaining amount of the contents is reduced, the volume of the inner container 10 is reduced, and the inner surfaces of the side wall portions 13 of the inner container 10 are partially in close contact with each other. . However, due to the presence of the adapter 50, the inner surfaces of the side wall portions 13 of the inner container 10 are not in a completely intimate contact state. A gap between the side wall portion 13 of the inner container 10 or a gap between the adapter 50 and the side wall portion 13 of the inner container 10 becomes a passage 60 for the contents. For this reason, even if the inner surfaces of the side wall portions 13 of the inner container 10 are partially in close contact with each other, the contents can be sucked by the pump 30 through the passage 60.

  The inner container 10 that has used up the contents can be replaced with a new inner container 10 filled with the contents. The replacement inner container 10 is a combination of a new pump 30, an outer lid 22, and an adapter 50, and the outer container 20 is repeatedly used. In this case, the inner container 10 can be exchanged without touching the contents to the outside air. Only the inner container 10 may be replaced, and the pump 30, the outer lid 22, the adapter 50, and the outer container 20 may be used repeatedly.

  The double container 100 according to the present embodiment described above has the following effects.

  According to the double container 100 of the present embodiment, the adapter 50 is attached to the pump 30. The adapter 50 secures a passage 60 for the contents around the suction port 36 of the pump 30 when the inner container 10 is deformed by the discharge of the contents. For this reason, even if the inner container 10 is deformed, the adapter 50 prevents the inner surfaces of the wall portions of the inner container 10 from being completely adhered to each other. Therefore, the content passage 60 can be secured between the suction port 36 of the pump 30 and the content, and the content can be discharged by the pump 30, and the amount of the remaining content can be reduced.

  According to the double container 100 of the present embodiment, the adapter 50 includes the passage forming portion 52 that is disposed around the suction port 36 of the pump 30. The passage forming portion 52 of the adapter 50 serves as a barrier to prevent the inner surfaces of the wall portions of the inner container 10 from being completely adhered to each other, and the passage 60 near the suction port 36 of the pump 30 is secured.

  According to the double container 100 of the present embodiment, the adapter 50 has the guide portion 53 that extends from the vicinity of the suction port 36 of the pump 30 toward the bottom of the inner container 10. The guide portion 53 of the adapter 50 can secure the content passage 60 from the position near the bottom of the inner container 10 toward the suction port 36 of the pump 30 even when the inner container 10 is deformed by the discharge of the contents. it can.

  According to the double container 100 of the present embodiment, each guide piece 57 of the guide portion 53 is formed continuously with each passage formation piece 56 of the passage formation portion 52. Thereby, the passage 60 secured by the guide portion 53 and the passage 60 secured by the passage formation portion 53 are easily continuous. Therefore, a continuous passage 60 from the position from the bottom of the inner container 10 to the suction port 36 of the pump 30 can be secured.

  According to the double container 100 of the present embodiment, the adapter 50 includes the holding portion 51 that is fitted on the outside of the cylinder 32 of the pump 30 and is disposed between the neck portion 12 of the inner container 10 and the cylinder 32. . The space between the inner container 10 and the cylinder 32 of the pump 30 can be reduced by the holding portion 51, and the amount of contents that enter and remain in the space can be reduced.

  According to the double container 100 of the present embodiment, the pump 30 has the vent hole 37 into which the outside air can be introduced into the inner container 10, and the adapter 50 is attached to the pump 30 so as to close the vent hole 37. Is done. For this reason, the pump 30 which has the ventilation hole 37 can be used by using the adapter 50, and the cost of the double container 100 can be reduced.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible.

DESCRIPTION OF SYMBOLS 100 Double container 10 Inner container 12 Neck part 13 Side wall part 14 Bottom wall part 20 Outer container 30 Pump 32 Cylinder 36 Suction port 37 Ventilation hole 50 Adapter 51 Holding part 52 Passage formation part 53 Guide part 57 Guide piece

Claims (6)

Storing the fluid content and deformable inner container;
An outer container containing the inner container;
A pump mounted on the inner container for discharging the contents;
An adapter that is attached to the pump and secures a passage for the contents around the suction port of the pump when the inner container is deformed by the discharge of the contents;
With double container. The double container according to claim 1,
The adapter is a double container including a passage forming portion disposed around the suction port of the pump. The double container according to claim 1 or 2,
The adapter is a double container having a guide portion extending from the vicinity of the suction port of the pump toward the bottom of the inner container. A double container according to claim 3,
The passage forming portion has a plurality of passage forming pieces,
The guide part has a plurality of guide pieces,
Each said guide piece of the said guide part is a double container formed continuously with each said passage formation piece of the said channel | path formation part. The double container according to any one of claims 1 to 4,
The pump comprises a cylinder;
The inner container includes a neck portion into which the cylinder is inserted,
The adapter is a double container provided with a holding part that is fitted to the outside of the cylinder and is disposed between the neck and the cylinder. The double container according to any one of claims 1 to 5,
The pump has a vent hole capable of introducing outside air into the inner container,
The adapter is a double container attached to the pump so as to close the vent hole.

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