Double container with refill container

Abstract

To provide a double container with a refill container, capable of suppressing the departure of the refill container.SOLUTION: A double container with a refill container comprises: a bottomed cylindrical outer container 11 extending in the vertical direction; an inner container 12 inserted into the outer container; and a refill container 13 which has a content stored therein, is formed in a bottomed cylindrical shape extending in the vertical direction, and is inserted into the inner container. The inner container is formed in a cylindrical shape in which both ends in the vertical direction are opened. An inner peripheral surface of the inner container comprises an upper inclined face 16 extending toward the inside in the radial direction as coming downward from an upper end edge, a lower inclined face 17 extending toward the inside in the radial direction as coming upward from a lower end edge, and a locking top which connects the upper inclined face and the lower inclined face to each other and is sharpened toward the inside in the radial direction. A locking projection 21 projecting toward the outside in the radial direction is formed on an outer peripheral surface of the refill container. The locking projection abuts on the lower inclined face, and abuts on the locking top or is close to the locking top.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a double container with a refill container. [Background technology]

[0002] BACKGROUND ART Conventionally, as shown in Patent Document 1 below, for example, containers have been known that include an outer container and a refill container that contains contents and is inserted into the outer container. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 63-40328 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with the conventional containers described above, it has been difficult to prevent the refill container from separating upward from the outer container.

[0005] The present invention provides a double container with a refill container that can prevent the refill container from coming off. [Means for solving the problem]

[0006] A double container with a refill container according to one embodiment of the present invention comprises an outer container having a bottomed cylindrical shape extending in the vertical direction, an inner container inserted into the outer container, and a refill container containing contents and formed into a bottomed cylindrical shape extending in the vertical direction and inserted into the inner container, wherein the inner container is formed into a cylindrical shape with both vertical ends open, and the inner surface of the inner container comprises an upper inclined surface extending radially inward as it extends downward from the upper edge, a lower inclined surface extending radially inward as it extends upward from the lower edge, and a locking apex that connects the upper inclined surface and the lower inclined surface and is pointed radially inward, and a locking protrusion that protrudes radially outward is formed on the outer surface of the refill container, and the locking protrusion abuts the lower inclined surface and abuts or is close to the locking apex.

[0007] The locking projection formed on the outer peripheral surface of the refill container abuts against the downward inclined surface on the inner peripheral surface of the inner container and abuts against or is close to the locking apex, making it difficult for the refill container to move upward relative to the inner container, and preventing the refill container from detaching upward from the inner container due to, for example, vibration or impact when the cap is removed. The inner container is formed in a cylindrical shape with both ends open in the vertical direction, the inner surface of the inner container has an upper inclined surface and a lower inclined surface, and the upper inclined surface and the lower inclined surface are connected to each other by a locking apex.Therefore, the inner container with the locking apex formed on its inner surface can be molded using a pair of molding dies that can be moved closer to and farther apart in the vertical direction, so that the parting line is located at the locking apex. This eliminates the need to remove the molding die (core) from inside the inner container by pulling it upward only from the upper opening of the inner container, as is the case when the inner container is formed, for example, as a bottomed cylinder with a closed lower opening, and makes it possible to prevent the locking top from being rubbed upward by the molding die when the container is removed, allowing the inner container to be formed easily and accurately.

[0008] The angle of inclination of an upper end of the lower inclined surface relative to the vertical direction may be greater than the angle of inclination of a portion of the lower inclined surface located below the upper end relative to the vertical direction.

[0009] The angle of inclination of the upper end of the lower inclined surface relative to the vertical direction is greater than the angle of inclination of the portion located below the upper end relative to the vertical direction, making it easier to bring the locking protrusion into contact with the upper end of the lower inclined surface in the vertical direction, thereby reliably preventing the refill container from detaching upward from the inner container.

[0010] The refill container may have a flange portion formed at its upper end portion that protrudes radially outward, and the flange portion may be placed on the edge of the upper opening of the inner container.

[0011] Since the flange portion formed at the upper end of the refill container is placed on the upper end opening edge of the inner container, the refill container is prevented from moving downward relative to the inner container, and the refill container can be reliably prevented from coming off the inner container. [Effects of the Invention]

[0012] According to one aspect of the present invention, it is possible to prevent the refill container from falling off. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a vertical cross-sectional view of a double container with a refill container shown as one embodiment. [Figure 2] FIG. 2 is an enlarged view showing a part II in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, a double container with a refill container according to one embodiment of the present invention will be described with reference to the drawings. As shown in Fig. 1, the double container 1 according to this embodiment comprises a cylindrical outer container 11 with a bottom and a cylindrical inner container 12. The refill container 13 is formed in a cylindrical shape with a bottom. The double container 1 with the refill container 13 is a wide-mouthed jar container. Cosmetics such as cream are stored inside the refill container 13. The double container 1 with the refill container 13 is not limited to a jar container and may be modified as appropriate.

[0015] The outer container 11, the inner container 12, and the refill container 13 are arranged coaxially on a common axis O. Hereinafter, the bottom 14 side of the outer container 11 along the common axis O will be referred to as the lower side, and the opposite side will be referred to as the upper side, the direction along the common axis O will be referred to as the vertical direction, the direction that intersects the common axis O when viewed from the vertical direction will be referred to as the radial direction, and the direction that circles around the common axis O will be referred to as the circumferential direction.

[0016] The outer container 11 is formed in the shape of a bottomed cylinder that extends in the vertical direction. A fixed cylinder 14a that extends upward is formed on the bottom 14 of the outer container 11. The fixed cylinder 14a is disposed coaxially with the common axis O. The upper end of the fixed cylinder 14a is located below the upper end opening of the outer container 11. The inner container 12 is formed in a cylindrical shape with both ends open in the vertical direction. The inner container 12 is made of a resin material or the like. The lower end of the inner container 12 is fitted into and fixed in the fixed cylinder 14a of the outer container 11. The upper part of the inner container 12 is located above the upper end of the outer container 11.

[0017] The inner container 12 has an upper portion located above the upper end of the outer container 11, and is provided with a surrounding tube 15 that protrudes radially outward and extends downward, surrounding the outer peripheral surface of the inner container 12 from the radial outside. The upper end of the surrounding tube 15 is located below the upper end of the inner container 12. The lower portion of the surrounding tube 15 is located radially outward from the fixed tube 14a and is inserted into the outer container 11. A male thread portion is formed on the outer peripheral surface of the upper portion of the surrounding tube 15, which is located above the upper end of the outer container 11. The lower portion of the surrounding tube 15 extends continuously over its entire circumferential length, and the upper portion extends intermittently over its entire circumferential length. The upper portion of the surrounding tube 15 has two intermittent portions 15a, which are located radially opposite each other.

[0018] The inner peripheral surface of the inner container 12 is provided with an upper inclined surface 16 that extends radially inward as it moves downward from the upper edge, a lower inclined surface 17 that extends radially inward as it moves upward from the lower edge, and a locking apex 18 that connects the upper inclined surface 16 and the lower inclined surface 17 to each other and is pointed radially inward. The vertical length of the upper inclined surface 16 is shorter than the vertical length of the lower inclined surface 17. The upper inclined surface 16 and the locking apex 18 are located above the upper end of the outer container 11.

[0019] 2, the angle of inclination of upper end 17a of lower inclined surface 17 relative to the vertical direction is larger than the angle of inclination of a portion located below upper end 17a relative to the vertical direction. Note that the former angle of inclination and the latter angle of inclination may be the same. The inclination angle of the upper inclined surface 16 relative to the vertical direction is equal to the inclination angle of the upper end portion 17a of the lower inclined surface 17 relative to the vertical direction, and is greater than the inclination angle of the portion located below the upper end portion 17a relative to the vertical direction. For example, the inclination angle of the upper inclined surface 16 relative to the vertical direction may be different from the inclination angle of the upper end portion 17a of the lower inclined surface 17 relative to the vertical direction, and may be less than the inclination angle of the portion located below the upper end portion 17a relative to the vertical direction.

[0020] The contents are stored in the refill container 13. The refill container 13 is made of, for example, a metal material, a resin material, or paper. The refill container 13 is formed in the shape of a cylinder with a bottom that extends vertically, and is inserted into the inner container 12.

[0021] A locking protrusion 21 that protrudes radially outward is formed on the outer peripheral surface of the refill container 13. The locking protrusion 21 abuts against the lower inclined surface 17 and is in contact with or close to the locking apex 18. The locking protrusion 21 abuts against a portion of the lower inclined surface 17 that is located below the upper end 17a. The rest of the outer peripheral surface of the refill container 13 other than the locking protrusion 21 is spaced radially inward from the inner peripheral surface of the inner container 12.

[0022] The locking protrusion 21 is formed in a curved surface that protrudes radially outward. When viewed radially, the locking protrusion 21 has a circular shape. A curved recess that recesses radially outward is formed on the inner circumferential surface of the refill container 13 at a position corresponding to the locking protrusion 21, and the locking protrusion 21 is formed in a hollow dome shape that protrudes radially outward. A plurality of locking protrusions 21 are formed at intervals in the circumferential direction. The locking protrusion 21 may extend continuously over the entire circumferential length.

[0023] A flange portion 22 that protrudes radially outward is formed at the upper end of the refill container 13. The flange portion 22 is placed on the edge of the upper opening of the inner container 12. A folded portion that extends downward is formed at the outer radial end of the flange portion 22. It is not necessary to form a folded portion on the flange portion 22.

[0024] The refill container 13 is inserted into the inner container 12 from the upper end opening of the inner container 12. At this time, the radially outer ends of the locking projections 21 of the refill container 13 move downward over the locking apex 18 on the inner circumferential surface of the inner container 12, and then slide downward over the upper end 17a of the lower inclined surface 17.

[0025] In the illustrated example, a cylindrical cap 19 with a top that seals the upper opening of the refill container 13 is detachably screwed onto the upper end of the surrounding tube 15. A packing 19a is attached to the underside of the top wall of the cap 19. The underside of the packing 19a abuts airtightly against the upper surface of the flange portion 22 of the refill container 13.

[0026] As explained above, in the double container 1 with refill container 13 according to this embodiment, the locking projection 21 formed on the outer peripheral surface of the refill container 13 abuts against the downward inclined surface 17 on the inner peripheral surface of the inner container 12 and abuts against or is close to the locking apex 18, making it difficult for the refill container 13 to move upward relative to the inner container 12, and preventing the refill container 13 from detaching upward from the inner container 12 due to, for example, vibration or impact when the cap 19 is removed.

[0027] The inner container 12 is formed in a cylindrical shape with both ends open in the vertical direction, and the inner surface of the inner container 12 has an upper inclined surface 16 and a lower inclined surface 17, with a locking apex 18 connecting the upper inclined surface 16 and the lower inclined surface 17 to each other. Therefore, the inner container 12 having the locking apex 18 formed on its inner surface can be molded using a pair of molding dies that can be moved closer to and farther apart in the vertical direction, so that the parting line is located at the locking apex 18. This eliminates the need to remove the molding die (core) from inside the inner container 12 upward from only the upper opening of the inner container 12, as would be the case if the inner container 12 were configured as a bottomed cylinder with a closed lower opening, and it is possible to prevent the locking top 18 from being rubbed upward by the molding die when the inner container 12 is removed from the mold, allowing the inner container 12 to be formed easily and accurately.

[0028] The angle of inclination of the upper end 17a of the lower inclined surface 17 relative to the vertical direction is larger than the angle of inclination of the portion located below the upper end 17a relative to the vertical direction, so that the locking projection 21 can be easily brought into contact with the upper end 17a of the lower inclined surface 17 in the vertical direction, thereby reliably preventing the refill container 13 from coming off the inner container 12 upward.

[0029] A flange portion 22 formed at the upper end of the refill container 13 is placed on the upper opening edge of the inner container 12, so that the refill container 13 is prevented from moving downward relative to the inner container 12, and the refill container 13 can be reliably prevented from coming off the inner container 12.

[0030] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0031] For example, the flange portion 22 does not need to be formed at the upper end of the refill container 13. The inner container 12 may not be provided with the surrounding cylinder 15, and the outer peripheral surface of the upper end of the inner container 12 may be provided with a male thread or the like to detachably fasten the cap 19 thereto. The cap 19 may be removably fitted onto the surrounding cylinder 15 .

[0032] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and the above-described variations may be combined as appropriate. [Explanation of symbols]

[0033] 1 double container 11 Outer container 12 Inner container 13 Refill container 16 Upper slope 17 Downward slope 18 Locking top 21 Locking protrusion 22 Flange

Claims

1. a cylindrical outer container with a bottom extending in the vertical direction; an inner container inserted into the outer container; a refill container that contains the contents, is formed into a cylindrical shape with a bottom extending in the vertical direction, and is inserted into the inner container; The inner container is formed in a cylindrical shape with both ends in the vertical direction open, The inner circumferential surface of the inner container is an upper inclined surface extending radially inward as it extends downward from the upper end edge; a lower inclined surface extending radially inward as it extends upward from the lower end edge; a locking apex portion that connects the upper inclined surface and the lower inclined surface to each other and that points radially inward, A locking projection is formed on the outer peripheral surface of the refill container so as to project radially outward, The double container with refill container, wherein the locking projection abuts against the lower inclined surface and abuts against or is close to the locking top.

2. 2. The double container with refill container according to claim 1, wherein the angle of inclination of the upper end of the lower inclined surface relative to the vertical direction is greater than the angle of inclination of the portion located below the upper end relative to the vertical direction.

3. A flange portion protruding radially outward is formed at the upper end of the refill container, 3. The double container with refill container according to claim 1, wherein the flange portion is placed on the edge of the upper opening of the inner container.

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