Dual container and dual container with lid

Abstract

The present invention is a double container (3) having an outer container (2) in which a protrusion (28) extending in the circumferential direction is formed on the outer surface of a mouth (M), and an inner container (1) having a hanging part (14) that hangs down from the outer edge end of an upper end flange (13) that extends outward from the upper end of a containing part (10) for containing contents, and having a protruding part (28) that protrudes in the circumferential direction from the outer edge end of the upper end flange (13) that extends outward from the upper end of the containing part (10), the protruding part (28) being formed on the outer surface of the mouth (M) of the outer container (2), and the protruding part (28) being formed on the outer surface of the mouth (M) of the inner container (1). An opening (16) is formed and an engagement piece (17) is provided, the engagement piece (17) elastically deforms in the opening region of the opening (16) when the vertical part (14) is viewed from the outer side surface, and when the inner container (1) is attached to the outer container (2), a part of the engagement piece (17) comes into contact with the lower side surface of the convex part (28), thereby preventing the release of the engagement between the outer container (2) and the inner container (1).

Description

Technical Field

[0001] The invention relates to a double container and a double container with a cover. Background Art

[0002] In recent years, from the viewpoint of reducing resin, double containers consisting of a reusable outer container and a replaceable refill (inner container) have been increasing.

[0003] In addition, as a technique for using the inner side of a wide-mouth can container for accommodating a viscous substance such as cosmetics or medicines as a refill container, there is known a structure in which an outer container is held from the outside by a retaining piece (hanging piece) extending outward from the upper end of the inner container and hanging down to the bottom around the mouth. As an example, in Patent Document 1, Figure 1 As shown, the following structure is disclosed: a tongue-shaped incision 94 is formed at the upper end of the outer container 92, a hanging piece 93 with spring characteristics hanging down from the outer side of the upper end of the inner container 91 covers the above-mentioned incision 94, and a snap-fitting portion 931 located at the lower end of the hanging piece 93 snaps into a snap-fitting portion 941 located on the lower side of the incision 94.

[0004] Patent Document 1: Japanese Patent No. 6448471 Summary of the invention

[0005] <Problems to be Solved by the Invention>

[0006] However, in the structure of Patent Document 1, since the cutout 94 is formed in the outer container 92, the outer container 92 cannot be formed of glass, and the material of the outer container 92 is limited.

[0007] In the structure of Patent Document 1, if a user grasps the hanging piece 93 from the outside and lifts it, the engagement of the engagement parts 931 and 941 is released, and the inner container 91 may be separated from the outer container 92 and fall off.

[0008] Therefore, in view of the above circumstances, the present invention provides a double container in which the material of the outer container does not need to be limited and the engagement between the inner container and the outer container is not easily disengaged unless the engagement is intended to be disengaged.

[0009] <Methods used to solve the problem>

[0010] In order to solve the above problems, one aspect of the present invention provides a double container having an outer container and an inner container, wherein:

[0011] The outer container has a convex portion extending in the circumferential direction formed on the outer side surface of the mouth portion.

[0012] The inner container has a hanging portion hanging down from the outer edge of the upper flange, and the upper flange extends outward from the upper end of the accommodating portion for accommodating the contents.

[0013] The hanging part is formed with an opening and provided with a locking piece. When the hanging part is viewed from the outside, the locking piece is elastically deformed in the opening area of ​​the opening.

[0014] When the inner container is mounted on the outer container, a portion of the engagement piece contacts the lower side surface of the protrusion, thereby preventing the engagement between the outer container and the inner container from being released.

[0015] <Effects of the Invention>

[0016] According to one aspect, in the double container, there is no need to limit the material of the outer container, and the engagement between the inner container and the outer container is not easily released when the engagement is not intended. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is an exploded perspective view of a conventional double container.

[0018] Figure 2 It is a cross-sectional view of a double container according to a first embodiment of the present invention.

[0019] Figure 3 It is a perspective view of the double container of the first embodiment.

[0020] Figure 4 It is an exploded perspective view of the double container of the first embodiment.

[0021] Figure 5 It is an enlarged perspective cross-sectional view showing the engagement state of the hanging portion of the inner container and the thin-walled portion of the mouth of the outer container in the first embodiment.

[0022] Figure 6 It is a cross-sectional perspective view of the vicinity of the hanging portion of the inner container and a cross-sectional perspective view of the vicinity of the mouth thin-walled portion of the outer container in the first embodiment.

[0023] Figure 7 It is a cross-sectional view of the double container of the first embodiment engaged with the lid.

[0024] Figure 8 It is an explanatory diagram of deformation of the engaging piece during assembly and disassembly of the double container according to the first embodiment.

[0025] Fig. 9 This figure compares the size of the opening of the hanging part with the size of a finger.

[0026] Fig.10 This is an enlarged cross-sectional view showing the engagement state of the hanging portion of the inner container and the mouth thin-walled portion of the outer container in the first embodiment, in a state where the hanging portion is grasped by fingers.

[0027] Fig.11 It is a graph showing the gripping force of the double container of the comparative example.

[0028] Fig.12 This is an enlarged cross-sectional view showing the engagement state of the hanging portion of the inner container and the mouth thin-walled portion of the outer container in Modification 1 of the first embodiment.

[0029] Fig.13 It is an enlarged cross-sectional view showing the engagement state of the hanging portion of the inner container and the mouth thin-walled portion of the outer container in Modification 2 of the first embodiment.

[0030] Fig.14 It is an exploded front view of a double container according to Modification 3 of the first embodiment.

[0031] Fig.15 The cover is shown engaged. Fig.14 An enlarged cross-sectional view of the engagement state between the hanging portion of the inner container and the thin-walled portion of the mouth of the outer container.

[0032] Fig.16 It is a cross-sectional perspective view of the vicinity of the hanging portion of the inner container and a cross-sectional perspective view of the vicinity of the mouth thin-walled portion of the outer container according to the second embodiment of the present invention.

[0033] Fig.17 It is an enlarged cross-sectional view showing the engagement state of the hanging portion of the inner container and the thin-walled portion of the mouth of the outer container in the second embodiment. DETAILED DESCRIPTION

[0034] Hereinafter, the mode for implementing the present invention will be described with reference to the drawings. In the following, in each of the drawings, the same components are denoted by the same reference numerals, and duplicate descriptions may be omitted.

[0035] The present invention relates to a double container, in particular to a double container for containing viscous substances or solid substances. The inner container of the double container is a resin or paper container, which can stand on its own or cannot stand on its own. The outer container of the double container is a self-standing container made of glass, wood, resin, silicon, metal, etc.

[0036] The content contained in the inner container held by the outer container of the double container of the present invention is preferably a viscous or solid substance such as cosmetics, perfume, detergent, seasoning, etc., which is not used all at once but is used in several portions.

[0037] In this specification, sticky substances refer to sticky cosmetics, sticky chemicals, sticky soaps, etc., such as sticky creams, hair waxes, ointments, etc. Solid substances are solid cosmetics or semi-solid cosmetics such as hair sticks, hair waxes, solid beauty serums (e.g., products with hardness similar to stick beauty serums) with particularly high hardness, solid soaps, cheese, butter and other foods, etc.

[0038] In the present invention, the viscous substance or the solid substance is filled by replacement together with the inner container as a refill (replacement container) pre-filled in the accommodation portion.

[0039] <Overall Structure of First Embodiment>

[0040] First, use Figures 2 to 4 The overall structure of the double container according to the first embodiment of the present invention will be described. Figure 2 It is a cross-sectional view of the double container 3 according to the first embodiment of the present invention. Figure 3 It is a perspective view of the double container 3 according to the first embodiment. Figure 2 Equivalent to Figure 3 A-side cross-sectional view. Figure 4 It is an exploded perspective view of the double container 3 according to the first embodiment.

[0041] The double container 3 of the present invention includes an inner container 1 and an outer container 2 . Figure 2 The double container 3 shown is in the shape of a can container having a wide mouth and a low back, but the double container 3 may also be in the shape of a vertically elongated bottle.

[0042] In this embodiment, the inner container 1 includes a cylindrical housing portion 10 having a bottom wall 11 and a side wall 12 , an upper end flange 13 extending outward from the upper end of the housing portion 10 , and two hanging portions 14A, 14B hanging from the outer edges of the upper end flange 13 .

[0043] The hanging parts 14A and 14B are tongue-shaped holding pieces for holding the outer container 2 from the outside and engaging with a part of the outer container 2. In the hanging parts 14A and 14B, an opening 16 is formed on the hanging pieces hanging from the outer edge of the upper end flange 13, that is, the hanging surface 15. In addition, a locking piece 17 is provided, which is a claw member that is elastically deformed in the opening area of ​​the opening 16 when the hanging parts 14A and 14B are viewed from the outside.

[0044] A lower end protrusion 18 protruding upward is provided at the lower end of the hanging surface 15 of the hanging portion 14A. The lower end protrusion 18 is used as a finger-lift portion on the inner container 1 side when pulling out the inner container 1 from the outer container 2. Alternatively, if it is too tight to be pulled out due to internal pressure changes, etc., it can also be used as a lifting aid when pulling out, for example, by putting a coin or the like in the gap below the lower end protrusion 18 and pushing it upward.

[0045] The inner container 1 is made of, for example, resin or paper. The resin constituting the inner container 1 is made of, for example, polyester resins such as polypropylene (PP), polyethylene (PE), acrylonitrile-butadiene-styrene (ABS), polybutylene terephthalate (PBS), polyoxymethylene (POM), polyethylene terephthalate (PET), biodegradable resins, and the like. Alternatively, the paper constituting the inner container 1 is, for example, a laminated body with paper as a base material.

[0046] The outer container 2 is a container receiving member that receives the inner container 1 in a replaceable manner. The outer container 2 includes a shell portion 20 having a bottom wall 21 and a side wall 22. In the outer container 2, a shoulder portion 23 extending inward is provided at the upper end of the shell portion 20, and a cylindrical mouth portion 24 extending upward is provided from the inner edge of the shoulder portion 23 (see Figure 4 ).like Figure 2 As shown, the diameter of the cylindrical mouth portion M is smaller than that of the shell portion 20 and is located on the inner side than the side wall 22.

[0047] The cylindrical mouth portion M has mouth thick wall portions 24A, 24B, 24 and mouth thin wall portions 27A, 27B. Figure 4 The cylindrical mouth M is alternately provided with a plurality of mouth thick-walled portions 24A, 24B and mouth thin-walled portions 27A, 27B, the inner side of which is a continuous circumferential surface, and the thickness of the outer side relative to the circumferential surface changes in a step-like manner. In detail, the mouth thin-walled portions 27A, 27B are longitudinally long rectangular regions partially recessed outward in the cylindrical mouth M, extending from the upper end of the cylindrical mouth M and not reaching the lower end. Therefore, in the cylindrical mouth M, the lower side of the annular protrusion 26 of the mouth thin-walled portions 27A, 27B becomes the mouth thick-walled portion 24 having the same thickness as the mouth thick-walled portions 24A, 24B.

[0048] In the cylindrical mouth M, the mouth thick-walled portions 24A and 24B are longer in the circumferential direction than the mouth thin-walled portions 27A and 27B. An annular protrusion 26 extending in the circumferential direction is provided on the entire circumference of the outer side of the cylindrical mouth M. A threaded protrusion 25 is provided on the outer peripheral surface of the mouth thick-walled portions 24A and 24B. In the present embodiment, the threaded protrusion 25 is interrupted in the circumferential direction at the portion of the mouth thin-walled portions 27A and 27B, while the annular protrusion 26 on the lower side is provided uninterruptedly in the circumferential direction below the mouth thin-walled portions 27A and 27B. It should be noted that the threaded protrusion 25 may also be interrupted near or in the circumferential direction of the mouth thin-walled portions 27A and 27B (see Fig.14 ).

[0049] The threaded protrusion 25 and the cover 4 (see Figure 7 ) is threadedly engaged with the threaded protrusion 43. The annular protrusion 26 is located at the lower side of the threaded protrusion 25, and the cover 4 is engaged to cover the annular protrusion 26. In addition, the annular protrusion 26 can also be a downward finger-lifting portion on the side of the outer container 2 when the inner container 1 is pulled out from the outer container 2.

[0050] The protrusions 28 extending in the circumferential direction and the grooves 29 located below the protrusions 28 are formed on the mouth thin-walled portions 27A and 27B. It should be noted that the protrusions 28 provided on the mouth thin-walled portions 27A and 27B only need to be stepped on the outer circumferential surface so as to protrude toward the outer diameter side at least relative to the grooves 29 immediately below the protrusions 28. Therefore, the protrusions 28 may not protrude relative to the upper ends of the mouth thin-walled portions 27A and 27B thereon or the outer side surfaces of the mouth thin-walled portions 27A and 27B located below the grooves 29. The protrusions 28 and the grooves 29 are used to engage with the engaging pieces 17 of the hanging portion 14.

[0051] The outer container 2 of the present invention does not have an intermittent portion such as the cutout of the conventional example, so it can be formed with various materials without material restrictions. For example, the outer container 2 is composed of resin, glass, wood, silicon, metal, paper, etc. The resin is composed of resins such as PP, PE, ABS, PBS, POM, PET, polyester resins, or biodegradable resins, as well as the above-mentioned inner container 1. In the case of wood, for example, wood of coniferous trees such as cedar, cypress and pine, and wood of broad-leaved trees such as oak, walnut, black cherry, firewood and rubber wood, and bamboo is also included. In the case of paper, for example, it is thick paper that can stand on its own.

[0052] Here, if Figure 4 As shown in the exploded view of , the inner container 1 becomes a refill that can be replaced (removable and replaceable) together with the viscous substance or solid substance as the content. On the other hand, the outer container 2 is repeatedly used after replacing the refill.

[0053] Therefore, the outer container 2 can be used repeatedly by replacing the empty inner container 1 with a new refill of the same shape.

[0054] The replaceable inner container 1 can be replaced with a film F (see Figure 4 ) or a cover surrounding the upper end flange 13 covers the upper surface of the upper end flange 13. Therefore, the inner container 1 as a replacement can be circulated separately.

[0055] It should be noted that although Figures 2 to 4 The example shown shows an example in which two hanging parts 14A and 14B are provided in the inner container 1, but in the inner container, the hanging parts may be one or three or more. And, in the case where the number of hanging parts of the inner container is three or more, the number of the mouth thin-walled parts in the cylindrical mouth M of the outer container is the same as the number of the hanging parts.

[0056] <Engagement between the Hanging Portion and the Thin-Walled Mouth Portion in the First Embodiment>

[0057] Next, use Figure 5 , Figure 6The structure and engagement of the hanging portion and the mouth thin-walled portion in the first embodiment will be described. Figure 5 1 is an enlarged cross-sectional perspective view showing the engagement state of the hanging portion 14A of the inner container 1 and the mouth thin-walled portion 27A of the outer container 2 in the first embodiment. Figure 6 1 , (a) is a cross-sectional perspective view of the vicinity of the hanging portion 14A of the inner container 1 according to the first embodiment, and (b) is a cross-sectional perspective view of the vicinity of the mouth thin-walled portion 27A of the outer container 2.

[0058] like Figure 5 and Figure 6 As shown, in the structure of the first embodiment, the engaging piece 17 formed in the hanging portion 14A of the inner container 1 is connected to the lower end of the opening 16 and extends upward in a cantilever beam shape, and is bent so that its upper end is located inside (inner diameter side) of the lower end.

[0059] Therefore, if Figure 5 As shown, when the inner container 1 is installed on the outer container 2, the hanging portion 14A hanging down from the outer side of the side wall 12 of the inner container 1 is opposite to the thin-walled portion 27A at the mouth of the outer container 2, and the upper end of a part of the snap-fitting piece 17 is snap-fitted with the groove portion 29 of the thin-walled portion 27A at the mouth.

[0060] Furthermore, by arranging the projection 28 above the groove 29 that engages with the upper end of the engagement piece 17, it is possible to prevent the engagement between the outer container 2 and the inner container 1 from being disengaged when a force other than the external force applied by the user for detachment is applied.

[0061] In addition, if Figure 5 As shown, in the engaged state, the outer side surface (outer diameter side surface) of the hanging surface 15 of the hanging portion 14 is located inside (inner diameter side) of the outer side surface of the thick wall portion 24A, 24B of the mouth of the outer container 2. Figure 7 ) When the outer container 2 is rotated relative to each other to engage with the thread, the hanging part 14 will not hinder it.

[0062] It should be noted that although Figure 5 An example is shown in which the engaging piece 17 formed in the hanging portion 14A of the inner container 1 is connected to the lower end of the opening 16 and extends upward in a cantilever beam shape, but the extending direction of the engaging piece 17 may also be in the up-down direction or in an inclined direction. Fig.16 , Fig.17 These will be described together as a second embodiment later.

[0063] In addition, in the structure of the present embodiment, by bending the upper end of the engaging piece 17 as the free end inward, the free end side (upper end side) of the cantilever beam-shaped engaging piece 17 is closer to the inner diameter side than the lower end as the root (joining end), that is, it protrudes inward. According to this structure, the upper end of the free end side of the engaging piece 17 hooks the convex part 28 of the mouth thin wall part 27A from the lower side to engage. Therefore, when the engagement is not to be released, for example, even when the double container 3 is lifted while being pressed from the outer diameter side near the engaging piece 17 or when the cover is opened as described later, it is not easy to release the engagement between the inner container 1 and the outer container 2, and the inner container 1 can be prevented from falling off from the outer container 2.

[0064] <Cap closure>

[0065] The double container 3 of the present invention can be engaged with a lid. Figure 7 A cross-sectional view showing an example of the double container 3 engaged with the lid 4 is shown.

[0066] The cover 4 has a top surface 41 and a peripheral wall 42. A threaded protrusion 43 is provided on the inner side of the peripheral wall 42.

[0067] The cap 4 of the present invention is a cap portion that covers the upper end flange 13 of the inner container 1 and the cylindrical mouth M of the outer container 2, and is made of resin such as PP, PE, ABS, PBS, POM, PET or polyester resin, biodegradable resin, etc.

[0068] In addition, a gasket 5 as a sealing material for preventing leakage is provided inside (underside) the top surface 41 of the cover 4. The gasket 5 may be bonded to the cover 4 or may be provided separately from the cover 4. The gasket 5 is formed of, for example, elastic rubber or resin (such as PP, PE).

[0069] When the cover 4 is engaged with the double container 3, the threaded protrusion 25 of the cylindrical mouth M of the outer container 2 is threadedly engaged with the threaded protrusion 43 of the cover 4. At this time, the gasket 5 is engaged in a state of being sandwiched between the lower surface of the top surface 41 of the cover 4 and the upper end flange 13 of the inner container 1.

[0070] When the lid 4 and the double container 3 are engaged with each other via the elastic gasket 5, the contents will not leak even if the double container 3 is tilted or turned upside down.

[0071] However, when the double container is left for a long time with the lid 4 engaged, the contents of the inner container 1 absorb the air inside the container, and negative pressure is formed inside the inner container 1. Alternatively, when the double container 3 is carried on an airplane for flight with the lid 4 engaged, negative pressure is formed inside the inner container 1 after landing due to changes in air pressure.

[0072] Due to the above, when negative pressure is formed inside the inner container 1, the gasket 5 is strongly adsorbed to the upper end flange 13. In this state, when the engagement between the double container 3 and the lid 4 is released, the inner container 1 is forced to separate from the outer container 2 as the gasket 5 is adsorbed.

[0073] However, in the structure of the present invention, the convex portion 28 is provided above the concave groove portion 29 in the thin-walled portion 27 of the mouth portion opposite to the hanging portion 14. Therefore, even if a force is applied to pull the hanging portion 14 upward by the adsorption of the sealing gasket 5, the upper end of the engaging piece 17 will receive resistance from the convex portion 28, thereby preventing the engaging piece 17 from passing over the convex portion 28 and causing the inner container 1 having the hanging portion 14 to fall off from the outer container 2.

[0074] On the other hand, when the engaging piece 17 is subjected to a force greater than a predetermined value in both the up and down directions by the hand of the user, it can move over the convex portion 28 .

[0075] (Movement of the snap-fit ​​piece)

[0076] Here, we will refer to Figure 5 , Figure 6 and Figure 8 The behavior of the engaging piece 17 for attaching (assembling) and detaching (disassembling) the inner container to and from the outer container in the first embodiment will be described. Figure 8 It is an explanatory diagram of the state of the engaging piece 17 when assembling and disassembling the double container 3.

[0077] exist Figure 8 In the figure, (a) shows a state in which the locking piece 17 is not in contact with the outer container 2, (b) shows a state in which the end of the locking piece 17 is in contact with the protrusion 28 of the outer container 2, (c) shows a state in which the end of the locking piece 17 slides on the inclined surface of the groove 29, and (d) shows a state in which the locking piece 17 is engaged with the deepest part of the groove 29.

[0078] like Figure 8 As shown, the groove 29 formed in the thin-walled portion 27A of the mouth of the outer container 2 is a V-shaped groove or a curved U-shaped groove whose cross section is inclined in the vertical direction toward the deepest part. Figure 8 As shown in (c), since the front end of the engaging piece 17 slides on the inclined surface or curved surface on the upper side of the groove portion, the groove portion is preferably a V-shaped or U-shaped groove with a rectangular cross-section that is not a right angle.

[0079] In addition, the width (circumferential length) of the groove 29 in the thin-walled portion 27A of the mouth of the outer container 2 is, for example, about 5 mm to 30 mm, and the length I in the vertical direction of the upper inclined surface or upper curved surface constituting the groove 29 is about 0.25 mm to 2.5 mm. Therefore, since the longitudinal length of the groove 29 is twice the length I of one curved surface, it is 0.5 mm to 5.0 mm. In addition, the deepest part of the groove 29 is about 0.5 mm to 3 mm. The vertical width W of the convex portion 28 at the upper end of the thin-walled portion 27A of the mouth is, for example, about 1 mm to 10 mm.

[0080] In the hanging portion 14A, the engaging piece 17 provided in the opening region of the opening portion 16 is elastically deformable when the inner container 1 and the outer container 2 are assembled or disassembled.

[0081] During assembly, the state of the engaging piece 17 is Figure 8 The order of changes is (a)→(b)→(c)→(d). Figure 8 As shown in (a), when the engagement piece 17 is in a non-contact state and no force is applied, the inner diameter side surface of the free end of the upper end of the engagement piece 17 is located radially inward of the inner diameter side surface of the lower end by a distance d. The distance d is, for example, about 5 mm to 15 mm.

[0082] So, if Figure 8 (a) → Figure 8 As shown in (b), when the inner container 1 is pushed downward relative to the outer container 2 to lower the position of the inner container 1, the engaging piece 17 is deformed by contacting the convex portion 28 at its front end and moves radially outward in the opening space formed by the opening portion 16. At this time, since the upper end of the engaging piece 17 is about to pass over the outer container 28, the engaging piece 17 is deformed by contacting the convex portion 28 at its front end and moving radially outward in the opening space formed by the opening portion 16. Figure 8 The "0" in (b) indicates the upper corner of the mouth thin-walled portion 27A, so Figure 8 (a) → Figure 8 Since resistance is generated during the movement of (b), the user must push with a force greater than a specified amount.

[0083] Furthermore, when the inner container 1 is pushed downward relative to the outer container 2, as shown in FIG. Figure 8 (b) → Figure 8 As shown in (c), the locking piece 17 moves downwardly toward the deep side (inner diameter side) of the groove 29 while its front end is deformed by contact with the upper inclined edge of the groove 29 and moved outward (outer diameter side) in the open space formed by the opening portion 16.

[0084] Then, when the inner container 1 is pushed to the lowermost end relative to the outer container 2, as shown in FIG. Figure 8 (c) → Figure 8As shown in (d), the upper flange 13 is close to the upper end U of the cylindrical mouth M of the outer container 2, and the front end of the engaging piece 17 is embedded in the deepest part of the groove 29. Therefore, the engaging piece 17 as a part of the hanging part 14A is engaged with the groove 29.

[0085] On the other hand, during disassembly, Figure 8 The order of changes is (d)→(c)→(b)→(a). Figure 8 As shown in (d) of FIG. 1 , in the engaged state, the front end of the engagement piece 17 , which is a part of the hanging portion 14A, is inserted into and engaged with the deepest part of the groove portion 29 .

[0086] like Figure 8 (d) → Figure 8 As shown in (c), when the inner container 1 is pushed upward relative to the outer container 2 to raise the position of the inner container 1, the locking piece 17 is deformed while its front end (upper end) contacts the upper inclined edge of the groove portion 29 and moves outward in the open space formed by the opening portion 16.

[0087] Furthermore, when the inner container 1 is pushed upward relative to the outer container 2, as shown in FIG. Figure 8 (c) → Figure 8 As shown in (b), the locking piece 17, in the open space formed by the opening portion 16, crosses the boundary between the upper inclined side of the groove portion 29 and the protrusion 28, and moves while contacting the outer side surface of the protrusion 28 while its front end is pushed outward and moved.

[0088] Here, when the upper end of the engaging piece 17 is Figure 8 (d) → Figure 8 When the state (c) is changed, the engaging piece 17 is elastically deformed, and a force is required so that the engaging piece 17 can climb up the upper inclined side of the groove 29 while receiving the force. Figure 8 (c) → Figure 8 In the state transition of (b), the engaging piece 17 elastically deforms in a direction of further contraction while receiving resistance, and a force is required to climb up the upper inclined edge of the groove 29 and cross the boundary line with the protrusion 28 while receiving force.

[0089] Therefore, even if a force is applied to pull the hanging portion 14 upwards due to the adsorption of the sealing gasket 5 due to the passage of time or the change of air pressure caused by the aircraft, the upper end of the engaging piece 17 will also receive resistance from the protrusion 28 during the process of releasing the engagement of the lid 4, thereby preventing the engaging piece 17 from falling off from the upper side of the protrusion 28. Alternatively, since the upper end of the engaging piece 17 receives resistance from the protrusion 28, even if the user accidentally grabs the hanging portions 14A and 14B to lift the double container 3, the outer container 2 can be prevented from suddenly falling downwards from the inner container 1.

[0090] On the other hand, when the user pulls the inner container 1 upward and the outer container 2 downward to disassemble the double container 3, when a force greater than a specified value is applied, the engaging piece 17 can move over the upper inclined edge of the groove 29 and the protrusion 28.

[0091] Furthermore, when the inner container 1 is pushed upward relative to the outer container 2, as shown in FIG. Figure 8 (b) → Figure 8 As shown in (a), after the engaging piece 17 moves while contacting the outer side surface of the protrusion 28, it enters a non-contact state, and the hanging portion 14A and the mouth thin wall portion 27A are no longer in contact, so that the engagement is released.

[0092] Due to the characteristics of the engaging piece 17, when a force other than the intended purpose is applied, such as the suction of the sealing gasket 5 or the grasping and lifting of the hanging portion 14A, the engagement between the inner container 1 and the outer container 2 is not easily released due to the contact between the front end of the engaging piece 17 and the convex portion 28, and the outer container 2 is not easily removed from the inner container 1. On the other hand, due to the characteristics of the engaging piece 17, the engagement can be released by applying a force from both the upper and lower directions to grasp and pull the inner container 1 and the outer container 2 apart.

[0093] (Size of the opening of the hanging part and the user's finger)

[0094] Here, we will refer to Fig. 9 and Fig.10 The dimensions of the user's finger and the opening 16 of the hanging portion 14 will be described. Fig. 9 This is a diagram comparing the size of a finger and the opening 16 of the hanging portion 14A. Fig.10 This is an enlarged cross-sectional view showing the engagement state between the hanging portion 14A of the inner container 1 and the mouth thin-walled portion 27A of the outer container 2 in a state where the hanging portion 14A is grasped by fingers. Fig.10 and later Figure 12 to Figure 13 , Fig.16 and Fig.17 Although one hanging portion 14A and one mouth thin-walled portion 27A are shown, the hanging portion 14B and the mouth thin-walled portion 27B have the same structure.

[0095] As described above, in the hanging portion 14A, the opening 16 surrounding the engaging piece 17 has a vertically long rectangular shape, a width OW of 1 cm or less, more preferably 0.7 cm or less, and a vertical length OH of 1 cm to 2 cm.

[0096] On the other hand, as an example, the average width of the index finger near the first joint of Japanese adults is about 1.4 cm, and the thumb is thicker than the index finger.

[0097] Thus, even if the user grips the hanging portion 14 with fingers, since the width of the index finger is wider than the width OW of the opening 16 , it is possible to avoid direct contact between the fingers and the engaging piece 17 located inside the opening 16 .

[0098] Therefore, if Fig.10 As shown, when the hanging part 14 is touched without intending to release the engagement (for example, when opening and closing the lid) without intruding the finger into the opening part 16, the engaging piece 17 will not be moved arbitrarily in the opening space defined by the opening part 16. Therefore, by the contact between the front end of the engaging piece 17 in the hanging part 14 and the convex part 28 of the mouth thin-walled part 27A, a certain resistance can be continuously applied, so that the engagement between the inner container 1 and the outer container 2 can be prevented from being easily released.

[0099] On the other hand, when the double container 3 is to be disassembled by releasing the engagement, the movement of the elastic engagement piece 17 will not be hindered even when the hanging portion 14 is tightly grasped. Therefore, as long as a force is applied from both the upper and lower directions to hold and pull apart the inner container 1 and the outer container 2, the double container 3 can be disassembled. Figure 8 As shown, the engaging piece 17 will slide and move to release the engagement.

[0100] (Comparative Example)

[0101] here, Fig.11 The gripping force of the double container of the comparative example is shown. Fig.11 The structure in which the entire surface of the hanging portion 82 of the inner container 81 is elastically deformed and engaged with the convex portion 85 of the outer container 84 is shown.

[0102] In the structure of this comparative example, the entire surface of the hanging portion 82 having the engaging protrusion 83 at the inner lower end is elastically deformed like a spring, so when the hanging portion 82 is pushed from the outside, the engagement becomes stronger, so that when the double container X is disassembled, the outer container 84 cannot be pulled out of the inner container 81.

[0103] Therefore, in Fig.11 In the comparative example, when disassembling the double container X, the user applies an outward opening force to the lower end of the hanging portion 82 to pull the engagement apart, and simultaneously applies a force in the direction of separation of the upper and lower parts, thereby disassembling. Therefore, during assembly or disassembly, the operation process of opening outward increases.

[0104] In contrast, in the structure of the present invention, a movable engaging piece 17 is provided in the opening 16 provided in the hanging part 14. Therefore, since the movement of the engaging piece 17 having spring characteristics is not hindered by the space defined in the opening 16, no matter how much "gripping force" is applied to the hanging part 14 from the outside, the pulling force is not affected. Fig.10As shown, even if the inner container and the outer container are held with fingers, when a force is applied in the vertical direction to separate the inner container and the outer container, the engaging piece deforms on the inner side of the opening, that is, on the inner peripheral side of the fingers, so that the engaging piece can be pulled out.

[0105] Therefore, during assembly or disassembly, there is no need to intentionally open the hanging portion as in the comparative example, and the engagement can be released by simply applying force from both upper and lower directions to hold and pull apart the inner container 1 and the outer container 2 .

[0106] In addition, if Figure 8 (d) and Fig.10 As shown, when engaged, a predetermined resistance is applied to the movement of the front end of the engaging piece 17 by the groove 29 and the protrusion 28 in the thin-walled portion 27A at the mouth. Therefore, the engaged state between the inner container 1 and the outer container 2 will not be released and will not be disassembled, and the double container state can be maintained only when the hanging portions 14A and 14B are grasped and lifted.

[0107] In this way, the present invention sets a prescribed resistance value for the engagement between the front end of the engaging piece 17 and the groove portion and the convex portion. When a force below the resistance value is applied without intending to release the engagement, the engagement between the inner container 1 and the outer container 2 will not be released. When a force greater than the resistance value is applied as a force for disassembly, the engagement between the inner container 1 and the outer container 2 can be released without any special additional action.

[0108] It should be noted that in the structure of the above-mentioned embodiment, the snap-fitting piece 17 is constructed by bending the upper end serving as the free end inward so that the free end side of the cantilever beam-shaped snap-fitting piece 17 is located closer to the inner diameter side than the lower end serving as the root (connecting end). However, the snap-fitting piece of the inner container of the present invention may also have other structures as long as the free end side protrudes more inward than the connecting end.

[0109] <Modification 1 of the engagement piece>

[0110] Fig.12 This is an enlarged cross-sectional view showing the engagement state of the hanging portion 14Aα of the inner container 1α and the mouth thin-walled portion 27A of the outer container 2α in the modification 1 of the first embodiment. In this modification, the engagement piece 17α in the hanging portion 14Aα of the inner container 1α is composed of a vertical extension portion 171 and an upper end protrusion 172.

[0111] Specifically, in the engagement piece 17α of this modification, the vertical extension portion 171 extends vertically from the vicinity of the lower end of the opening portion 16 of the hanging portion 14Aα to the upper side. In addition, the vertical extension portion 171 is configured to be thinner on the outer diameter side than the hanging surface 15. The upper end protrusion 172 protrudes inward from the upper end of the vertical extension portion 171.

[0112] In the structure of this modified example, an upper end protrusion 172 protruding inward is provided at the free end, i.e., the upper end, of the engagement piece 17α, so that the inner side surface of the free end of the cantilevered engagement piece 17α is closer to the inner diameter side than the lower end as the root (joining end), i.e., protrudes inward. According to this structure, since the upper end protrusion 172 located at the free end side of the engagement piece 17α engages with the groove portion 29 in a manner of hooking the convex portion 28 of the mouth thin-walled portion 27A from the lower side, it is not easy to release the engagement between the inner container 1α and the outer container 2α when the engagement is not intended to be released, and the inner container 1α can be prevented from being separated from the outer container 2α.

[0113] It should be noted that in the structure of this modified example, since the thickness of the engaging piece 17α is different at the upper end and the lower end, the movable space of the engaging piece 17α can be ensured even in the state of being grasped by fingers. Therefore, it is preferably configured so that the difference in thickness between the thin-walled portion 27A, 27B and the thick-walled portion 24α, 24Aα (not shown), 24Bα (not shown) in the cylindrical mouth of the outer container 2α is greater than Fig.10 It should be noted that Fig.12 The side ratio of the thick wall portion 24α at the mouth is shown. Fig.10 Although the structure is thick, the mouth thin-walled portion 27A side may also be configured to be thin.

[0114] <Modification 2 of the engagement piece>

[0115] Fig.13 This is an enlarged cross-sectional view showing the engagement state of the hanging portion 14Aβ of the inner container 1β and the mouth thin-walled portion 27A of the outer container 2α in the second modification of the first embodiment. In this modification, the engagement piece 17β in the hanging portion 14Aβ of the inner container 1β is composed of the upper and lower extending portions 171, the thickness changing portion 173 and the upper end protrusion 172β.

[0116] Specifically, the upper and lower extending portions 171 of the engaging piece 17β in this modification have the same Fig.12 However, in the thickness variation portion 173, the thickness of the engaging piece 17β gradually increases from the bottom to the top and is connected to the upper end protrusion 172β.

[0117] In addition, in the structure of this modified example, by providing an upper end protrusion 172β protruding inwardly at the free end, i.e., the upper end, of the engaging piece 17β, the inner side surface of the free end of the cantilevered engaging piece 17β is located at a position closer to the inner diameter side than the lower end as the root (joining end), i.e., protruding inwardly. According to this structure, in a state where the upper end protrusion 172β is engaged with the groove 29, the upper end of the free end side of the engaging piece 17β can continuously apply a constant resistance by hooking (contacting) the convex portion 28 of the mouth thin-walled portion 27A. Therefore, when the engagement is not intended to be released, it is not easy to release the engagement between the engaging piece 17β of the inner container 1β and the mouth thin-walled portion 27A of the outer container 2α, and the inner container 1β and the outer container 2α can be prevented from separating.

[0118] It should be noted that in the structure of this modified example, in the hanging portion 17Aβ, the thickness varies above and below the engaging piece 17β, and the thickness at the upper end is different from that at the lower end. Therefore, as in the modified example 1, in order to ensure a movable space for the engaging piece 17β even when grasped with fingers, it is preferably configured so that the difference in thickness between the thin-walled portion 27A, 27B at the mouth and the thick-walled portion 24α, 24Aα, 24Bα at the mouth of the outer container 2α is greater than Fig.10 It should be noted that Fig.13 The side ratio of the thick wall portion 24α at the mouth is shown. Fig.10 Although the structure is thick, the mouth thin-walled portion 27A side may also be configured to be thin.

[0119] <Modification 3 of the First Embodiment>

[0120] Fig.14 It is an exploded front view of a double container according to Modification 3 of the first embodiment. Fig.15 The cover is shown engaged. Fig.14 An enlarged cross-sectional view of the engagement state between the hanging portion of the inner container and the thin-walled portion of the mouth of the outer container.

[0121] Although there are two hanging parts as described above, there may be only one hanging part. In this modified example, an example in which there is only one hanging part 14 is shown. Therefore, in the cylindrical mouth Mδ of the outer container 2δ as the engagement object, one mouth thin wall part 27δ and one mouth thick wall part 24δ are provided in the circumferential direction.

[0122] In the case of having one hanging portion 14δ, the width of the single hanging portion 14δ and the mouth thin-walled portion 27δ opposite thereto in the circumferential direction can be wider than in the case of having multiple hanging portions. However, even in the case of the hanging portion 14δ being wider, in order to prevent the user's fingers from interfering with the engaging piece 17 in the hanging portion 14δ, the width of the single hanging portion 14δ and the mouth thin-walled portion 27δ opposite thereto in the circumferential direction can be wider. Fig. 9Similarly, the opening 16 surrounding the engagement piece 17 is in a vertically long rectangular shape, and is configured such that the width OW is 1 cm or less, more preferably 0.7 cm or less, and the vertical length OH is 1 cm to 2 cm.

[0123] In addition, if Fig.14 As shown, in the outer container 2δ, the thread protrusion 25δ provided on the outer peripheral surface of the mouth thick wall portion 24δ can be interrupted in the vicinity without reaching the mouth thin wall portion 27δ. It should be noted that, although not shown in the figure, since the female thread of the cap 4 engaged with the thread protrusion 25δ, that is, the thread protrusion 43, is provided uninterruptedly in the circumferential direction, in the outer container 2δ, even if the thread protrusion 25δ is interrupted, the cap 4 and the cylindrical mouth Mδ of the outer container 2δ can be threadedly engaged without any problem.

[0124] On the other hand, longitudinal ribs 121 are provided on the outer side of the side wall 12δ of the container 10δ of the inner container 1δ. By providing the longitudinal ribs 121, when the double container 3δ is assembled, a gap G is left between the outer side surface of the side wall 12δ of the container 10δ of the inner container 1δ and the inner side surface of the cylindrical mouth Mδ of the outer container 2δ. As a result, since the close contact area between the inner container 1δ and the outer container 2δ on the side surface is reduced, excessive close contact can be prevented.

[0125] Furthermore, an annular rib 131 is provided on the upper surface of the upper end flange 13δ of the inner container 1δ. Therefore, when the gasket 5δ is provided on the inner side (lower side) of the top surface 41 of the cover 4, the gasket 5δ is provided above the annular rib 131, and when the gasket 5δ is in close contact with the upper end flange 13δ, the annular rib 131 sinks into the gasket 5δ.

[0126] <Second embodiment>

[0127] Next, use Fig.16 , Fig.17 The structure of the double container according to the second embodiment of the present invention will be described. Fig.16 In the drawings, (a) is a cross-sectional perspective view of the vicinity of the hanging portion 140A of the inner container 1γ according to the second embodiment, and (b) is a cross-sectional perspective view of the vicinity of the mouth thin-walled portion 270A of the outer container 2γ according to the second embodiment. Fig.17 This is an enlarged cross-sectional view showing the engagement state of the hanging portion 140A of the inner container 1γ and the mouth thin-walled portion 270A of the outer container 2γ in the second embodiment. Only the differences from the first embodiment will be described.

[0128] In the structure of the present embodiment, the engaging piece 170 of the inner container 1γ extends downward in a cantilever beam shape, so that its upper end is connected to the vicinity of the upper end of the opening 160 in the hanging surface 150 of the hanging portion 140A, and its lower end side is a free end, and its lower end is bent to be located on the inner diameter side than its upper end. According to this structure, the direction of the engaging piece 170 according to the present embodiment is opposite to the extending direction of the engaging piece 17 according to the first embodiment.

[0129] On the other hand, in the present embodiment, in the thin-walled portion 270A at the mouth of the outer container 2γ, the convex portion 280 abutted by the inner side surface of the lower end of the free end of the engaging piece 170 and the groove portion 290 into which the free end is inserted when engaging are located at a lower side than in the first embodiment. According to this structure, it is possible to ensure a movable space for the engaging piece 170 whose extending direction is in the up-down direction opposite to that of the first embodiment and whose lower end side is the free end.

[0130] In this embodiment, the engaging piece 170 extends downward in a cantilever shape, and its lower end is bent to be closer to the inner diameter side than the upper end, so that the inner side surface of the lower end as the free end is closer to the inside than the upper end as the root (joint end), that is, it protrudes inward.

[0131] In addition, although the overall view is not shown, in the present embodiment, the horizontal width and the vertical width of the opening 160 in the hanging portion 140A are both less than 1 cm. Therefore, in a state where a finger does not intrude into the inside of the opening 160, the engaging piece 170 does not move arbitrarily in the open space defined by the opening 160 when the engagement is not to be released. In addition, according to this structure, the lower end of the free end side of the engaging piece 170 hooks (abuts) the lower side of the convex portion 280 of the mouth thin-walled portion 270A and engages, so when the engagement is not to be released, it is not easy to release the engagement between the inner container 1γ and the outer container 2γ, and the inner container 1γ can be prevented from being separated from the outer container 2γ.

[0132] On the other hand, in the present embodiment, the engaging piece 170 is movably provided in the opening 160 provided in the hanging part 140A. Therefore, due to the space defined in the opening 160, the movement of the engaging piece 170 having spring characteristics is not hindered, so no matter how much "gripping force" is applied to the hanging part 140A from the outside, the pulling force is not affected. That is, even if the inner container 1γ and the outer container 2γ are gripped with fingers, by applying force in the vertical direction in the direction of separation, the engaging piece 170 will be deformed on the inner side of the opening 160, that is, on the inner peripheral side of the fingers, so that it can be pulled out.

[0133] It should be noted that Fig.17The illustrated engaging piece 170 is configured such that the free end side of the cantilever beam-shaped engaging piece 170 is located inside the lower end as the root (joining end) by bending the upper end as the free end inward. However, even in this embodiment, the engaging piece 170 may be configured such that the free end side protrudes inwardly from the joining end using other shapes. For example, in the engaging piece supported from top to bottom in the cantilever beam shape as in the second embodiment, if the free end side of the cantilever beam-shaped engaging piece 170 is bent inwardly, the free end side of the cantilever beam-shaped engaging piece 170 may be bent inwardly. Fig.12 The engagement piece 17α of the modification 1 may be configured as a straight hanging piece and a protrusion protruding inwardly from the lower side of the free end of the hanging piece, as if the structure of the engagement piece 17α of the modification 1 is reversed. Fig.13 As in the second modification example, the structure of the engaging piece 17β is reversed up and down, and the engaging piece may be composed of a hanging piece with a gradually changing thickness.

[0134] In addition, although the engaging piece in the hanging portion is cantilevered and extends from bottom to top in the first embodiment and the engaging piece is extended from top to bottom in the second embodiment, the extending direction of the engaging piece 17 may be oblique.

[0135] <Third Embodiment>

[0136] In addition, Figure 7 , an example of a cover 4 and an outer container 2 being threadedly engaged is shown, but the cover 4 may not be threadedly engaged, but may be a push-in type. In the case of a push-in type, the outer container 2 may not be provided with a threaded protrusion, but may be provided with a convex portion 28 extending circumferentially in the entire area and a groove portion 29 located below the convex portion on the outer side surface. In this case, the inner container 1 may not be provided with a plurality of local hanging portions, but may be provided with a cylindrical vertical tube around the entire outer edge of the upper end flange 13. In this case, the hanging straight tube only needs to be provided with one or more openings and the same number of engaging pieces as the openings located inside the openings.

[0137] Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the specific embodiments involved, and various modifications and changes can be made within the scope of the gist of the embodiments of the present invention described in the claims.

[0138] This international application claims priority based on Japanese patent application No. 2022-107334 filed on July 1, 2022, and incorporates the entire contents of No. 2022-107334 into this international application.

[0139] Description of Reference Numerals

[0140] 1. 1α, 1β, 1γ inner container

[0141] 2. 2α, 2β, 2γ outer container

[0142] 3 Double container

[0143] 4 Cover

[0144] 5 Gasket

[0145] 10 Accommodation

[0146] 11 bottom wall

[0147] 12 Sidewall

[0148] 13, 13δ upper flange

[0149] 131 Annular Rib

[0150] 14A, 14B, 14Aα, 14Aβ, 140A, 14δ hanging part

[0151] 15, 150 hanging down

[0152] 16, 160 opening

[0153] 17, 17α, 17β, 170 snap-on pieces

[0154] 18 Lower end protrusion

[0155] 20 Housing

[0156] 21 bottom wall

[0157] 22 Sidewall

[0158] 23 Shoulders

[0159] 24, 24A, 24B, 24α thick wall at mouth

[0160] 25 Thread protrusion

[0161] 26 Ring ribs

[0162] 27A, 27B, 270A mouth thin wall part

[0163] 28, 280 convex part

[0164] 29, 290 groove

[0165] 3. 3δ double container

[0166] 4 Cover

[0167] 5.5δ Sealing gasket (sealing component)

[0168] M cylindrical mouth (mouth).

Claims

1. A double container having an outer container and an inner container, wherein: The outer container has a convex portion extending in the circumferential direction formed on the outer side surface of the mouth portion. The inner container has a hanging portion hanging downward from the outer edge of the upper flange, and the upper flange extends outward from the upper end of the accommodating portion for accommodating the contents. The hanging part is formed with an opening and provided with a locking piece. When the hanging part is viewed from the outside, the locking piece is elastically deformed in the opening area of ​​the opening. When the inner container is mounted on the outer container, a portion of the engagement piece contacts the lower side surface of the protrusion, thereby preventing the engagement between the outer container and the inner container from being released.

2. The double container according to claim 1, wherein: The opening is in a longitudinally long rectangular shape with a width of less than 1 cm.

3. The double container according to claim 1, wherein: The outer container has a groove portion extending in the circumferential direction formed on the outer side surface of the mouth portion and below the convex portion.

4. The double container according to claim 3, wherein: The engaging piece is connected to one end of the opening portion and extends in a cantilever shape, and a free end of the engaging piece protrudes toward the inner diameter side than the coupling end.

5. The double container according to claim 4, wherein: The mouth of the outer container is provided with a thick-walled portion and a thin-walled portion, the inner side surface of the thick-walled portion is a continuous circumferential surface, and the thickness in the radial direction from the inner side surface is thick, and the thin-walled portion is recessed in a stepped manner in the radial direction from the end of the thick-walled portion, and is shorter than the thick-walled portion in the circumferential direction, The groove is formed on the outer side of the thin-walled portion of the mouth. When the outer container and the inner container are engaged with each other, the hanging portion and the thin-walled portion are opposed to each other, and a part of the engaging piece is engaged with the groove portion.

6. The double container according to claim 5, wherein: The hanging part is provided with a plurality of The mouth portion has a plurality of thick-walled portions and a plurality of thin-walled portions, and the thick-walled portions and the thin-walled portions are alternately arranged.

7. The double container according to claim 5, wherein: In the outer container, a threaded protrusion is formed on an outer side surface of the thick wall portion.

8. The double container according to claim 1, wherein: The outer container has a shell portion having a bottom wall and a side wall, The opening is a cylindrical opening located inside the side wall of the casing.

9. The double container according to claim 7, wherein: The double container can be threadably engaged with a cap having an internal thread.

10. A double container with a cover, comprising: A dual container according to any one of claims 1 to 9; as well as A cover is engageable with the mouth of the outer container.

11. The double container with a cover according to claim 10, wherein: A sealing member is provided on the lower surface of the top surface of the cover.

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