JP2023063922A - Inner container assembling mechanism of double container - Google Patents

Abstract

To provide a double container formed by storing an inner container constituted of a tube or the like inside an outer container, provided with mechanisms other than a mechanism screwing by relatively rotating the inner container against an outer container as a mechanism for assembling the inner container to the outer container.SOLUTION: An inner container assembling mechanism for assembling an inner container made of a tube 11 or the like to an outer container made of a bottle part 21 and a bottle neck part 22, is constituted of: the bottle neck part 22 as an outer container opening part; and an engagement part made of a rib 19 frictionally engaging with an inner-peripheral face of the bottle neck part 22.SELECTED DRAWING: Figure 2

Description

The present invention provides an inner container assembly mechanism for a double container, that is, in order to construct a double container consisting of an inner container for storing contents and an outer container for housing the inner container inside, the inner container is attached to the outer container. It relates to an assembly mechanism.

2. Description of the Related Art Conventionally, as disclosed in Patent Document 1, for example, there is known a double container comprising an inner container for storing contents and an outer container for housing the inner container therein. In such a double container, as described in Patent Document 1, when the content to be stored in the inner container is cosmetics or the like, the inner container is used as a refillable container (refillable container). often. That is, in that case, when the inner container of the double container you are using is empty, you can replace it with a new inner container that holds the contents, without discarding the often beautifully formed outer container. Continuous use is possible.

On the other hand, Patent Document 2 discloses that when a sleeve made of synthetic resin is molded in manufacturing a refill container made of synthetic resin, a bottom part made of synthetic resin is integrally formed with the sleeve by insert molding. ing. Further, Patent Document 3 discloses that when molding an airtight container for storing cosmetics or the like, a lid portion made of a resin material is integrally formed inside the lid by insert molding.

JP-A-7-315414 JP 2006-008169 A JP 2005-289429 A

As described above, in a double container consisting of an inner container for storing contents and an outer container for housing the inner container inside, when the inner container is used as a refill container, the inner container can be easily and reliably assembled to the outer container. , is detachable. Conventionally, as an inner container assembling mechanism that satisfies such requirements, a mechanism is widely known in which the inner container and the outer container are rotated relative to each other around the container axis at the respective container mouth portions and the two are screwed together.

By the way, if the inner container has a flat shape and the outer container also has a flat shape accordingly, it is difficult to rotate the inner container in the outer container as described above. In order to allow this rotation, even if the inner container has a flat shape, the outer container may have a relatively large inner diameter, for example, a cylindrical shape. However, a double container consisting of an inner container and an outer container having such a shape does not look good and is difficult to increase its commercial value.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances. To provide an inner container assembly mechanism that can be reliably assembled and removed.

The mechanism for assembling the inner container of the double container according to the present invention is
an inner container for storing contents;
An inner container assembly mechanism for constructing a double container comprising an outer container to which the inner container is assembled so as to accommodate at least part of the inner container therein,
an outer container opening formed at one end of the outer container and having an opening through which the inner container can pass;
It is capable of holding an inner container, and frictionally engages with the opening peripheral wall of the opening when the inner container is pushed into the outer container so that at least a part of the inner container is accommodated inside the outer container. an engaging portion;
It is characterized by consisting of
Specifically, as the inner container, a container made of a flexible packaging material such as a tube or a pouch, or a container such as another bottle can be applied.

The above-mentioned "frictional engagement" may be made over the entire circumference of the opening peripheral wall, or may be made only in part of the opening peripheral wall. Moreover, the above-mentioned "holding" includes both fixing and detachably holding the inner container. In addition, "holdable" means that when the inner container itself constitutes a refill, there may be a state where the inner container is not held with respect to the engaging portion. It shows that the present invention includes such a state.

In the inner container assembly mechanism of the double container according to the present invention having the above configuration,
The inner container comprises a dispenser communicating with a content outlet for discharging the content through the outlet;
It is desirable that the dispenser is arranged to be operable from outside the outer container when at least part of the inner container is housed inside the outer container.

Further, in the mechanism for assembling the inner container of the double container according to the present invention, at least one of the portion of the engaging portion contacting the opening peripheral wall and the portion of the opening peripheral wall contacting the engaging portion is made of elastically deformable rubber or elastomer. It is desirable that the engaging portion and the opening peripheral wall are elastically engaged with each other.

Further, it is preferable that a portion of the engaging portion that contacts the opening peripheral wall is formed with a ridge extending along a direction in which the engaging portion is pushed into the outer container. It is desirable that such a ridge has a cross-sectional shape viewed from the pushing direction, which tapers gradually from the inner container side and becomes sharpened. On the other hand, the shape of the opening may be substantially elliptical.

The mechanism for assembling the inner container of the double container according to the present invention is
an outer container opening formed at one end of the outer container and having an opening through which the inner container can pass;
It is capable of holding an inner container, and frictionally engages with the opening peripheral wall of the opening when the inner container is pushed into the outer container so that at least a part of the inner container is accommodated inside the outer container. an engaging portion;
, the inner container can be reliably assembled to the outer container by simply pushing the engaging portion into the outer container. In addition, the inner container can be easily removed from the outer container by moving the engaging portion in the direction opposite to the pushing operation.

1 is a perspective view showing a double container having an inner container assembly mechanism according to a first embodiment of the present invention; FIG. FIG. 2 is a side sectional view showing the double container of FIG. 1; FIG. 2 is a side cross-sectional view showing essential parts of the double container of FIG. FIG. 3 is a side cross-sectional view showing the main part of the double container of FIG. 1 as seen from a direction different from that of FIG. A perspective view (a) and a plan view (b) showing an engaging part constituting an inner container assembly mechanism. FIG. 2 is an exploded perspective view showing the double container of FIG. 1; Perspective view (a) and plan view (b) showing another example of the engaging part Perspective view (a) and plan view (b) showing still another example of the engaging part Partially broken side view (a), partially broken side view (b) and plan view (c) as seen from another direction showing still another example of the engaging part

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 and 2 are a perspective view and a sectional side view, respectively, showing a double container 1 having an inner container assembly mechanism according to one embodiment of the present invention. 3 and 4 are enlarged side cross-sectional views showing the portion of the inner container assembly mechanism as viewed from different directions.

First, the double container 1 will be described with reference to FIGS. 1 and 2. FIG. The double container 1 is composed of an inner container 10 storing contents such as liquid or cream cosmetics, and an outer container 20 containing the inner container 10 therein. The inner container 10 is to be assembled with the outer container 20, and the double container 1 will be described below assuming that the assembly has been completed (the state shown in FIGS. 1 and 2). Here, the terms "upper" and "lower" described below refer to the upper and lower sides of the double container 1 standing up as shown in FIGS.

FIG. 2 shows a cross-sectional shape of a plane including the line AA shown in FIG. 1 and the center line of the double container 1 (some parts are not sectioned), viewed from the direction of the arrow in FIG. showing. Here, the center line is substantially the same as the long axis of the substantially cylindrical injection button 13, which will be described later. 2 shows a state in which the cap 30, which is omitted in FIG. 1, is attached.

The inner container 10 in this embodiment particularly constitutes a so-called refill together with other parts. In other words, when the content stored in the inner container 10 is used up, the inner container 10 is removed from the outer container 20, and a new inner container 10 containing the content is attached to the outer container 20 instead. used. The present invention can be similarly applied to the case where the inner container 10 that does not constitute such a refill is assembled with the outer container 20 .

The inner container 10 in this embodiment is composed of a tube 11 made of a synthetic resin laminated material or the like that directly stores the contents as described above, a dispenser made up of a base 12, an injection button 13, etc., and an engaging part 14. It is The entire inner container 10 is used as a refill. In addition, the inner container is not limited to the tube 11 made of a flexible packaging material, and the inner container may be configured of a pouch made of a similar soft packaging material, a bottle, or the like.

On the other hand, the outer container 20 includes a bottomed bottle portion 21 made of, for example, synthetic resin, which is transparent so that the inner container 10 housed therein can be visually recognized, and a bottle portion 21 also made of synthetic resin formed on the bottle portion 21 . and a bottleneck portion 22 of The bottleneck portion 22 has an open upper end, as shown in FIG. 6, which will be described later. The bottle neck portion 22 is formed in a cylindrical shape with a substantially elliptical cross section, and the bottle portion 21 below it is also formed in a substantially elliptical cylindrical shape with a slightly thicker cross section than the bottle neck portion 22 .

Here, FIG. 3 shows an enlarged view of the inner container assembly portion in the side cross-sectional view shown in FIG. 2 in the same viewing direction as in FIG. In addition, FIG. 4 shows the above-mentioned inner container assembly part, which is viewed from a different direction from that of FIG. 3 and 4 show the bottle neck portion 22 as a separate component from the bottle portion 21, they may be integrally formed. 5(a) and 5(b) respectively show a perspective shape and a plane shape of the engaging part 14 used in the inner container assembly portion. 6 shows a perspective view of the double container 1 before the inner container 10 is attached to the outer container 20. As shown in FIG. Hereinafter, the inner container assembly mechanism according to the present embodiment will be described in detail with reference to these FIGS. 3 to 6 as well.

As clearly shown in FIGS. 2 to 4, the engaging part 14 includes a substantially elliptical flange portion 16, an inner cylindrical portion 17 whose upper end is connected to the lower surface of the flange portion 16, and the flange portion 17. An outer tubular portion 18 whose upper end portion is connected to the lower surface of the outer tubular portion 16 and ribs 19 (projections) provided on the outer peripheral surface of the outer tubular portion 18 are integrally formed. As an example, the flange portion 16, the inner cylindrical portion 17, and the outer cylindrical portion 18 are integrally molded from PP (polypropylene), and the ribs 19 are, for example, insert-molded from an olefinic elastomer material during this integral molding. formed. More specifically, TPE (thermoplastic elastomer) or the like can be suitably used as this olefinic elastomer.

As clearly shown in FIG. 5, the flange portion 16 has a substantially elliptical outer shape, and has a circular hole for passing a dispenser in the central portion. As clearly shown in FIGS. 3 and 4, the inner cylindrical portion 17 has a cylindrical portion connected to the flange portion 16 and a double cylindrical portion having an inner cylinder 17a folded upward at the lower end portion. A dispenser mounting screw 17b is provided on the outer peripheral surface of the inner cylinder 17a. The upper end of the inner cylinder 17a is closed with a disc portion 17c having a circular opening in the center. A screw 17d for fixing the neck portion 11a of the tube 11 is formed on the inner peripheral surface of the inner cylinder 17a. The screw 17d is fitted with a screw 11b formed on the outer peripheral surface of the neck portion 11a of the tube 11 having an outlet, thereby fixing the neck portion 11a. This fixation will be described in detail later. In FIG. 2, portions such as the screws 11b and 17d are omitted.

The outer cylindrical portion 18 is formed in a cylindrical shape having a substantially elliptical cross-sectional shape, and the outer peripheral surfaces at both ends in the minor axis direction thereof are formed in a cylindrical shape having a substantially elliptical cross-sectional shape. It is formed in a size that can be closely combined with the inner peripheral surfaces at both ends in the direction of the minor axis. 3, the major axis direction of the outer cylindrical portion 18 is the horizontal direction in the drawing, while in FIG. 4, the minor axis direction of the outer cylindrical portion 18 is the lateral direction in the drawing.

The rib 19 has a trapezoidal cross-sectional shape in a plane perpendicular to the longitudinal direction in which the radially outer dimension of the outer tubular portion 18 is smaller than the radially inner dimension. The rib 19 is connected to the lower surface of the flange portion 16 in a state of projecting outward from the outer peripheral surface of the outer tubular portion 18 . The rib 19 is formed in a tapered shape such that the overhanging dimension gradually decreases as the distance from the integrated flange portion 16 increases. Further, the ribs 19 are made of an elastomer material as described above, so that they are elastically deformable in the minor axis direction of the outer cylindrical portion 18 .

A dispenser is attached to the engaging part 14 . As shown in FIG. 2, the dispenser includes an injection button 13 having an injection nozzle 13a on its side, a base portion 12 holding the injection button 13 so as to be vertically movable, and the base portion 12 held by the flange portion 16. It is composed of the base holding portion 15 and the like. A lower portion 13b extending downward from the injection button 13 has a communication passage inside, and a suction pipe 13c is connected to the lower portion 13b from below. The suction pipe 13c is inserted into the neck portion 11a of the tube 11 whose outlet is opened as described above, and the thread 11b of the tube 11 is fitted with the thread 17d of the inner cylinder 17a so as to maintain this state. , the tube 11 is firmly fixed to the inner cylindrical portion 17 when the neck portion 11a is blocked. The fixation between the tube 11 and the inner tubular portion 17 is not limited to the screw fitting as described above. It may be done by inserting it into the surface and frictionally engaging both peripheral surfaces.

As shown in FIGS. 2 to 4, a coil spring 25 is arranged in a compressed state on the base 12 of the dispenser so as to surround the lower portion 13b of the injection button 13. As shown in FIGS. When the injection button 13 is pushed against the repulsive force of the coil spring 25, the contents in the tube 11 are sucked up from the suction tube 13c and discharged from the injection nozzle 13a through the communication passage in the lower portion 13b. .

As described above, the dispenser comprising the injection button 13 and the like, the inner container 10 comprising the engaging part 14 and the tube 11 is put in a package (not shown) as a refill and sold. After the inner container 10 is removed from the package as shown in FIG. 6, the inner container 10 is passed through the bottle neck portion 22 from the tube 11 side as indicated by the two-dot chain line arrow in FIG. It is assembled to the outer container 20 so as to be positioned inside 21 . That is, during this assembly, the flat bottom portion of the tube 11 having a certain length passes through the inside of the bottleneck portion 22 with its lower edge approximately aligned with the longitudinal direction of the bottleneck portion 22 . FIG. 1 shows the double container 1 consisting of the inner container 10 and the outer container 20 after this assembly.

The assembly of the inner container 10 and the outer container 20 will be described in detail below. When inserting the inner container 10 into the bottle neck portion 22 from the tube 11 side toward the inside of the bottle portion 21 , the orientation of the engaging part 14 is adjusted so that the rib 19 fits inside the opening peripheral wall of the bottle neck portion 22 . , the inner container 10 is pushed into the outer container 20 under this condition. Then, the rib 19 is elastically deformed and elastically frictionally engaged with the inner surface of the opening peripheral wall of the bottleneck portion 22 . Therefore, the engaging part 14 is not easily detached from the bottleneck portion 22 (that is, the inner container 10 is separated from the outer container 20). In addition, the elastic deformation of the ribs 19 when the frictional engagement is performed provides a unique feeling that cannot be felt when non-elastic bodies are engaged with each other. The above two effects can be obtained even when the inner surface of the opening peripheral wall of the bottleneck portion 22 is elastically deformable together with the rib 19, and furthermore, only the inner surface of the opening peripheral wall of the bottleneck portion 22 is elastic without the rib 19 being elastically deformed. The same can be obtained in the case of being deformable.

Since the rib 19 is tapered as described above, it is easy to insert the rib 19 into the bottleneck portion 22, and then the rib 19 is pushed into the outer container 20 as the inner container 10 is pushed into the outer container 20. The elastic engagement between 19 and the inner surface of the opening peripheral wall of bottle neck portion 22 gradually becomes stronger, and the separation is more reliably prevented.

More specifically, the ribs 19 described above extend along the direction in which the inner container 10 is pushed into the outer container 20 . 1 and 6, the rib 19 is tapered and sharpened from the side of the inner container 10 in the cross-sectional shape viewed from the top to the bottom in FIG. 1 and FIG.

As described above, in this embodiment, the bottle neck portion 22 constitutes the outer container opening of the present invention, and the engaging part 14 having the rib 19 serves as an engaging portion that frictionally engages the opening peripheral wall of the opening. Configure.

In this double container 1, since the inner container 10 includes the tube 11 having a flat shape particularly at the bottom opposite to the neck portion 11a, the bottle portion 21 of the outer container 20 also conforms to the shape of the tube 11. It has a flat shape. Therefore, it is not possible to adopt a mechanism for rotating the inner container 10 around each central axis (major axis) in the outer container 20 and screwing them together. However, in this embodiment, a bottleneck portion 22 having an opening through which the tube 11 can pass is provided at the upper end portion, which is one end portion of the outer container 20, and the ribs 19 provided on the engaging part 14 are formed on the opening peripheral wall of the bottleneck portion 22. Since the inner surface is frictionally engaged, it is possible to assemble the inner container 10 to the outer container 20 without screwing as described above.

Such an inner container assembly mechanism based on frictional engagement can be formed at a relatively low cost compared to an inner container assembly mechanism based on screwing, so it is advantageous in terms of cost reduction of the double container 1 . Further, the inner container assembling mechanism using friction engagement enables quick replacement of the inner container 10 in a relatively short time compared to the inner container assembling mechanism using screwing. In order to remove the inner container 10 from the outer container 20 for replacement or the like, the inner container 10 can be pulled out from the outer container 20 by following the two-dot chain line arrow shown in FIG.

The bottle portion 21 of the outer container 20 may be formed in a relatively large-diameter cylindrical shape that allows the rotation of the inner container 10 inside, instead of the flat shape described above. Even in such a case, the inner container 10 can be quickly replaced in a relatively short period of time by adopting the inner container assembling mechanism by friction engagement of the present invention instead of adopting the inner container assembling mechanism by screwing. effect can be obtained.

Next, modified examples of engaging parts that can be applied in the present invention in place of the engaging part 14 described above will be described with reference to FIGS. 7 and 8. FIG. In these figures, each part of the engaging part is given the same number as the number given to the engaging part 14 in FIG. .

These modified engaging parts 14 basically differ in the number of ribs 19 from the engaging part 14 shown in FIG. That is, in the engaging part 14 of FIG. 7, six ribs 19 are provided along the entire circumference of the outer cylindrical portion 18 at appropriate intervals. Further, in the engaging part 14 of FIG. 8, ten ribs 19 are provided along the entire circumference of the outer cylindrical portion 18 at suitable intervals. 5, 7 and 8, 2, 6 or 10 ribs 19 may be provided, and any other appropriate number such as 4 in the configuration of FIG. 9 to be described later may be provided. good too. It is desirable to provide a plurality of ribs 19 in order to engage the engaging part 14 while maintaining a predetermined posture with respect to the bottleneck portion 22 .

FIG. 9 shows a further different engagement part. Since this engaging part is largely different in overall shape from the above-described engaging part 14, it will be described as an engaging part 54 below. This engaging part 54 also has an outer tubular portion 58 formed in a tubular shape with a substantially elliptical cross-sectional shape. 9, (a), (b), and (c) show the side shape of the engaging part 54 as seen from the minor diameter direction of the outer tubular portion 58, and the side surface as seen from the major diameter direction of the outer tubular portion 58, respectively. The shape and plane shape are shown. More specifically, in (a) and (b) of FIG. It shows a shape with a part cut away so that it can be seen.

In addition to the outer cylindrical portion 58, the engaging part 54 has a substantially cylindrical inner cylindrical portion 57 disposed inside thereof, and a lower surface connected to the upper ends of these cylindrical portions 57 and 58. and a substantially elliptical flange portion 56 that extends downward. In this example, the flange portion 56 and the cylindrical portions 57 and 58 are integrally formed. In addition, the outer tubular portion 58 and the inner tubular portion 57 are formed so as to share a peripheral wall at the end portion of the outer tubular portion 58 in the minor diameter direction. As an example, four ribs 59 are arranged on the outer peripheral surface of the outer tubular portion 58 . These ribs 59 are formed integrally with an annular engaging portion 60 fixed to surround the outer peripheral surface of the outer cylindrical portion 58 slightly below the upper end of the outer cylindrical portion 58 .

As an example, the flange portion 56, the inner cylindrical portion 57 and the outer cylindrical portion 58 are integrally molded from PP. It is formed by insert-molding a system elastomer material. More specifically, the outer cylindrical portion 58 has a stepped shape with a small diameter at a slightly lower portion than the upper end thereof, and the annular engaging portion 60 is formed at the stepped small diameter portion ( That is, it is placed in contact with the large-diameter portion above it from below). This prevents the annular engaging portion 60 from easily separating from the outer cylindrical portion 58 when an upward external force acts on the annular engaging portion 60 .

When the outer cylindrical portion 58 is divided into two by a plane passing through both ends in the longitudinal direction, that is, an upper portion and a lower portion of a dashed line extending in the left-right direction in FIG. 9(c). , two of the four ribs 59 are attached to the upper portion of the outer tubular portion 58 and the other two are attached to the lower portion. The two ribs 59 are arranged at a distribution angle of 33° from the center of the outer cylindrical portion 58 in this example. It should be noted that this distribution angle is not the angle from the center of the outer cylindrical portion 58, but the ribs 59 that have a cross-sectional shape of roughly pentagram and protrude from the outer surface of the outer cylindrical portion 58 in plan view. is the angle from the intersection of the projection directions at However, the distribution angle of the two ribs 59 is, of course, not limited to 33°, and the number of ribs installed is not limited to four in total.

The engaging part 54 to which the inner container is fixed as described above is, for example, pushed into the outer container 20 shown in FIG. is assembled to the outer container 20 . In this case also, each rib 59 is elastically deformed and elastically frictionally engaged with the inner surface of the opening peripheral wall of the bottleneck portion 22 of the outer container 20 . Therefore, the engaging part 54 does not easily separate from the bottle neck portion 22 (that is, the inner container from the outer container 20).

When the engaging part 54 is pushed into the bottle neck portion 22 of the outer container 20 from above, an upward external force is applied to the annular engaging portion 60 in contact with the inner peripheral surface of the bottle neck portion 22 via the four ribs 59 . However, as described above, the annular engaging portion 60 is not easily separated from the outer cylindrical portion 58 by such an external force. The annular engaging portion 60 is preferably formed in a tapered shape so that the outer circumference thereof becomes smaller in diameter as it goes downward (toward the bottom portion 57b of the inner cylindrical portion 57) so that the frictional engagement can be performed more smoothly. preferable.

On the other hand, a side view of the rib 59 is shown at the right end position of FIGS. As clearly shown in these figures, the surface of the rib 59 is formed with a gentle concave portion at a position slightly above the lower end. Therefore, if the inner surface of the opening peripheral wall of the bottle neck portion 22 of the outer container 20 is formed with a gentle convex portion that is received in the concave portion when the pushed-in engaging part 54 is frictionally engaged, the engaging part 54 and the engaging part 54 are formed. Frictional engagement with the bottleneck portion 22 can be made more smoothly and reliably.

Furthermore, even if the ribs 59 or 19 as described above are provided on either the outer cylindrical portion 58 or 18 side or the bottleneck portion 22 side, or if the ribs 59 or 19 are not provided on either side, the above-described Contrary to the example, the outer tubular portion 58 or 18 may be formed from a material that is not particularly elastically deformable, and the bottleneck portion 22 may be formed from a material that is elastically deformable. If the bottle neck portion 22 is made of an elastically deformable member, whether it is a rib or a smooth inner circumference, it can be formed by insert molding as described above, for example.

Further, in the above-described embodiment, the refill is composed of the dispenser including the injection button 13, etc., the engaging part 14, and the tube 11, but as another modification, the refill may be composed of only the tube 11. Alternatively, a refill may be constructed from the engaging part 14 and the tube 11 . In the former case of these modifications, the dispenser and engaging part 14 will continue to be used even if the refill is replaced. In the latter case, the dispenser will continue to be used even if the refill is replaced. In this latter case, it is necessary to attach the dispenser to the engaging part 14 of the new refill each time the refill is replaced.

In the case where the refill is composed only of the tube 11 as described above, each time a new refill is used, the screw 17d shown in FIGS. The tube 11 and the inner tubular portion 17 are integrated by fitting the screws 11b. Even in this case, the inner container 10 can be combined with the outer container 20 in a state in which the longitudinal direction of the outer tubular portion 18 and the extending direction of the lower edge of the flat bottom portion of the tube 11 are substantially aligned. If so, when assembling, the lower edge of the bottom of the tube 11, which has a certain length, is approximately aligned with the longitudinal direction of the bottleneck portion 22, and the tube 11 is placed inside the bottleneck portion 22. can pass through.

When the tube 11 is integrated with the inner cylindrical portion 17, in order to make the direction in which the lower edge of the flat bottom portion of the tube 11 extends substantially coincide with the longitudinal direction of the outer cylindrical portion 18, for example, the inner side The start position of the screw 17b that is carved into the inner cylinder 17a of the cylindrical portion 17 and the start position of the screw 11b that is carved into the neck portion 11a of the tube 11 are set to have a predetermined relationship. can be considered. As a result, when the tube 11 is rotated to integrate with the inner cylindrical portion 17, the two directions described above are oriented when the screw 11b and the screw 17b are tightly engaged so that the tube 11 cannot be rotated further. It is possible to realize a state in which they are substantially matched.

In addition, the present invention is not limited to the case where the contents stored in the tube 11 are cosmetics, but can be similarly applied to cases where the contents are other than cosmetics, such as those having health effects. The effect as described above is achieved.

1 Double Container 10 Inner Container 11 Tube 12 Base of Dispenser 13 Injection Button 14, 54 Engaging Part 15 Base Holding Part of Dispenser 16, 56 Flange of Engaging Part 17, 57 Inner Cylindrical Part of Engaging Part 18, 58 Outer cylindrical portion of engaging part 19, 59 Rib 20 Outer container 21 Bottle portion of outer container 22 Bottle neck portion of outer container 60 Annular engaging portion

Claims (8)

an inner container for storing contents;
An inner container assembly mechanism for constructing a double container comprising an outer container to which the inner container is assembled so as to accommodate at least part of the inner container therein,
an outer container opening formed at one end of the outer container and having an opening through which the inner container can pass;
The inner container is capable of holding the inner container, and when the held inner container is pushed into the outer container so as to accommodate at least part of the inner container inside the outer container, frictional engagement with the opening peripheral wall of the opening is achieved. An inner container assembly mechanism for a double container comprising a mating engaging portion. wherein the inner container comprises a dispenser that communicates with a content outlet and discharges the content through the outlet;
2. The inner container assembly mechanism for a double container according to claim 1, wherein when at least a part of said inner container is housed inside said outer container, said dispenser is arranged in a state in which it can be operated from the outside of said outer container. . At least one of a portion of the engaging portion in contact with the opening peripheral wall and a portion of the opening peripheral wall in contact with the engaging portion is made of an elastically deformable material, so that the engaging portion and the opening peripheral wall are elastically connected. 3. The double-container inner container assembly mechanism according to claim 1 or 2, which engages. 4. The inner container assembly mechanism for a double container according to claim 3, wherein said elastically deformable material is an elastomer. 5. The inner container assembly mechanism for a double container according to any one of claims 1 to 4, wherein a portion of the engaging portion that contacts the peripheral wall of the opening is formed with a ridge extending along the pushing direction. . 6. The mechanism for assembling an inner container of a double container according to claim 5, wherein the cross-sectional shape of said ridge when viewed from the direction of said push-in is a shape that tapers gradually from the inner container side and becomes sharpened. The inner container assembly mechanism for a double container according to any one of claims 1 to 6, wherein the opening has a substantially elliptical shape. 8. The mechanism for assembling an inner container for a double container according to any one of claims 1 to 7, wherein the contents stored in the inner container contain a component exhibiting at least one of a cosmetic effect and a health effect.

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