JP6930291B2 - Cosmetic container - Google Patents

Description

The present invention relates to a resin cosmetic container provided with a hinge.

There is a metal container used for a cigarette holder or the like, whose lid is opened and closed by a hinge, and which can obtain a free-stop property so that the opening angle of the lid is maintained (Patent Document 1). In this container, a part of the shaft of the metal hinge is curved in an arc shape, and the curved part is pressed into the cylinder of the hinge.

However, this container requires special equipment for manufacturing a partially curved metal shaft, which complicates the manufacturing process. Further, when this hinge structure is applied to a resin cosmetic container, it becomes complicated to separate the resin lid or the container body from the metal shaft when the compact container is discarded.

On the other hand, it is a cosmetic container in which the lid and the shaft of the hinge are integrally molded with resin. A groove for fitting the shaft is formed in the container body of the cosmetic container, and the lid edge on the hinge side is the container body when the lid is opened and closed. There is a case in which an inclined surface is formed on the lid edge portion so as to always be in sliding contact with the edge portion of the lid (Patent Document 2). According to this cosmetic container, since a metal shaft is not used, the number of parts of the cosmetic container is reduced, the manufacturing process is simplified, and the resin lid or container body and the metal shaft are separately disposed of. It also becomes unnecessary. However, the free-stop property is gradually deteriorated while the hinge is repeatedly opened and closed, and the degree of opening of the lid may not stop at a desired position.

Japanese Unexamined Patent Publication No. 2001-193337 Japanese Unexamined Patent Publication No. 2013-666582

An object of the present invention is to make a cosmetic container having a lid that opens and closes with a hinge having a free-stop property, in which not only the container body and the lid but also the hinge is made of resin and the durability of the free-stop property is improved. ..

In a cosmetic container in which a resin container body and a resin lid are connected by a hinge, the present inventor integrally molds the hinge shaft into one of the container body and the lid, and fits the shaft into the other. When forming a groove, if the shaft is formed in a curved shape without being fitted in the groove and the groove is formed in a straight line, the shaft is fitted in the groove according to the opening / closing angle of the hinge. Since the initially curved shaft is pressed against the inner surface of the groove and deforms linearly, the restoring force of the deformation provides a free stop property in which the opening angle of the lid is maintained, and the shaft is We have found that when the shape is curved in the groove, the shaft is less likely to undergo plastic deformation because no pressing force is applied to the shaft, and the durability of the free stop property is improved, and the present invention has been conceived.

That is, the present invention is a cosmetic container in which a resin container body and a resin lid are connected by a hinge, and a shaft forming the hinge is integrally resin-molded on the container body or the lid, and the shaft is formed. Provided is a cosmetic container in which a fitting groove is formed linearly in a lid or a container body, and the shaft is curved in a state where the fitting groove is not fitted in the groove.

In the cosmetic container of the present invention, the container body and the lid are made of resin, and one of the container body and the lid is integrally resin-molded with a shaft forming a hinge, and a groove for fitting the shaft is formed on the other. Compared to the case where a metal shaft is used as the hinge shaft, the number of parts during manufacturing of the cosmetic container is reduced, and when the cosmetic container is disposed of, the resin lid and container body are made of metal. It is not necessary to separate from the axis of.

Furthermore, in the hinge of this cosmetic container, the shaft fitted in the linear groove is curved when it is not fitted in the groove, so that the shaft is curved in the groove according to the opening angle of the lid. The degree changes, and the initially curved shaft is pressed by the inner surface of the groove and deforms linearly, or returns to the originally curved shape. Here, the more linear the shaft is, the stronger the shaft presses the inner surface of the groove due to the restoring force of the shaft, so that the shaft is less likely to rotate in the groove. Therefore, when the angle formed by the inner surface of the lid and the bottom surface of the container body is set as the opening angle of the lid, a free stop property in which the opening angle of the lid is maintained can be obtained.

On the other hand, depending on the opening angle of the lid, the shaft in the groove approaches the initial curved shape, and the pressing force applied to the shaft from the inner surface of the groove is reduced. Therefore, it is possible to prevent the shaft from being plastically deformed and the free stop property from being impaired.

FIG. 1 is an exploded perspective view of the cosmetic container 1A of the embodiment, an arrow view taken along the line AA, and a cross-sectional view taken along the line BB. FIG. 2A is a perspective view of a cosmetic container 1A having an open lid. FIG. 2B is a perspective view of a cosmetic container 1A with a closed lid as viewed from the lid side. FIG. 2C is a perspective view of the cosmetic container 1A with the lid closed as viewed from the bottom surface side of the container body. FIG. 2D is a view taken along the line AA of the cosmetic container 1A shown in FIG. 2B. FIG. 2E is a cross-sectional view taken along the line BB of the cosmetic container 1A shown in FIG. 2B. FIG. 2F is a cross-sectional view taken along the line CC of the cosmetic container 1A shown in FIG. 2B. FIG. 3A is a cross-sectional view perpendicular to the central axis of the axis near the base of the axis for explaining the action of the hinge of the cosmetic container 1A. FIG. 3B is a cross-sectional view perpendicular to the central axis of the axis near the base of the axis for explaining the action of the hinge of the cosmetic container 1A. FIG. 3C is a cross-sectional view perpendicular to the central axis of the axis near the base of the axis for explaining the action of the hinge of the cosmetic container 1A. FIG. 3D is a cross-sectional view perpendicular to the central axis of the axis near the base of the axis for explaining the action of the hinge of the cosmetic container 1A. FIG. 3E is a cross-sectional view perpendicular to the central axis of the axis near the base of the axis for explaining the action of the hinge of the cosmetic container 1A. FIG. 4 is an exploded perspective view of the cosmetic container 1B of the embodiment. FIG. 5 is a perspective view of the cosmetic container 1B of the embodiment. FIG. 6A is a cross-sectional view perpendicular to the central axis of the axis near the base of the axis for explaining the action of the hinge of the cosmetic container 1B. FIG. 6B is a cross-sectional view perpendicular to the central axis of the axis near the base of the axis for explaining the action of the hinge of the cosmetic container 1B. FIG. 6C is a cross-sectional view perpendicular to the central axis of the axis near the base of the axis for explaining the action of the hinge of the cosmetic container 1B. FIG. 7A is a cross-sectional view of the vicinity of the base of the shaft for explaining the action of the hinge of the cosmetic container 1C. FIG. 7B is a cross-sectional view of the vicinity of the base of the shaft for explaining the action of the hinge of the cosmetic container 1C. FIG. 8A is a cross-sectional view of the vicinity of the base of the shaft for explaining the action of the hinge of the cosmetic container 1D. FIG. 8B is a cross-sectional view of the vicinity of the base of the shaft for explaining the action of the hinge of the cosmetic container 1D. FIG. 9 is an exploded perspective view, an arrow view of AA, and an arrow view of BB of the cosmetic container 1E. FIG. 10 is an exploded perspective view of the cosmetic container 1F. FIG. 11 is an exploded perspective view of the cosmetic container 1G. FIG. 12A is a perspective view of the cosmetic container 1H with the lid closed. FIG. 12B is a cross-sectional view of the cosmetic container 1H with the lid closed. FIG. 13A is a cross-sectional view of the vicinity of the base of the shaft for explaining the action of the hinge of the cosmetic container 1H. FIG. 13B is a cross-sectional view of the vicinity of the base of the shaft for explaining the action of the hinge of the cosmetic container 1H. FIG. 13C is a cross-sectional view of the vicinity of the base of the shaft for explaining the action of the hinge of the cosmetic container 1H. FIG. 14 is a cross-sectional view of a modified mode of the hinge of the cosmetic container. FIG. 15 is an exploded perspective view and an arrow view of AA in a modified mode of the cosmetic container. FIG. 15 is an exploded perspective view of a modified mode of the cosmetic container and a front view of the lid. FIG. 17 is an exploded perspective view of a modified mode of the cosmetic container. FIG. 18 is a cross-sectional view of the vicinity of the base of the hinge shaft of the cosmetic container.

Hereinafter, the present invention will be described in detail with reference to the drawings. In each figure, the same reference numerals represent the same or equivalent components.

<Overall configuration>
(Cosmetic container 1A)
FIG. 1 is an exploded perspective view of a cosmetic container 1A according to an embodiment of the present invention, FIG. 2A is a perspective view of the cosmetic container 1A with the lid open, and FIGS. 2B and 2C are the perspective views thereof. It is a perspective view of the state in which the lid of the cosmetic container 1A is closed.

The cosmetic container 1A has a flat rectangular parallelepiped shape as a whole, and is formed of a resin container body 10 and a resin lid 30. The lid 30 has a shaft 40 integrally molded with the lid 30. The inner surface 31 of the lid 30 is a mirror surface of a mirror provided as needed. A groove 20 into which the shaft 40 is fitted is formed in the container body 10, and a recess 11 used for storing a replacement container for cosmetics, a coating tool, or the like is formed in the central portion of the container body 10. By fitting the shaft 40 formed in the lid 30 into the groove 20 formed in the container body 10, a hinge 2 is formed by the shaft 40 and the groove 20, and the container body 10 and the lid 30 are connected to each other.

Examples of the resin forming the cosmetic container 1A include ABS, PET, PP, PC, AS (acrylonitrile / styrene copolymer), PCTA (dicarboxylic acid component containing terephthalic acid and isophthalic acid as main components). 1. Resins such as polyester) obtained by polycondensing a diol component containing 4-cyclohexanedimethanol diol as a main component can be used, and ABS resin and the like are particularly preferable from the viewpoint of production.

(Hinge axis)
The cosmetic container 1A has a pair of shafts 40a and 40b provided substantially along the edge 32 of the lid 30 as the shaft 40 constituting the hinge 2. One end of each of the pair of shafts 40a and 40b has a cantilever structure and is symmetrically supported by the opposite side wall of the lid 30, and the bases 41a and 41b of the shafts 40a and 40b near the side wall are the edges 32 of the lid 30. It is a round bar parallel to. On the other hand, in a state where the shafts 40a and 40b are not fitted in the groove 20, the tip portions 42a and 42b are curved from the central portion of the shafts 40a and 40b. When the shaft is curved from the central portion in this way, the shafts 40a and 40b are formed as compared with the case where the shaft is bent from the base portion or the shaft is formed so that the base portion of the shaft intersects the side wall of the lid at an angle. It is possible to improve the durability of the shafts 40a and 40b with respect to the linear deformation in the groove 20.

In the present invention, the direction of curvature of the shaft 40 can be set according to the opening angle of the lid that obtains free stop property when opening and closing the lid 30, and the degree of curvature of the shaft 40 is fleece. In order to obtain the top property, it can be set according to the degree to which the lid is difficult to rotate.

As an example, in the cosmetic container 1A of the present embodiment, the shafts 40a and 40b in a state of not being fitted into the groove 20 are the shafts 40a and 40b and the inner surface 31 of the lid from the central portion toward the tip portions 42a and 42b. It is perpendicular to the inner surface 31 of the lid and is curved in a plane including the center line La of the base portions 41a and 41b of the shaft so that the distance between the two is gradually increased. Here, in the cross section of the bases 41a and 41b of the axes 40a and 40b perpendicular to the central axis La, the point farthest from the central axis La among the axes 40a and 40b is defined as P, and the direction from the central axis La toward the point P. Is the bending direction D of the shaft (FIG. 1), and with the shafts 40a and 40b fitted in the groove 20, the bending direction D of the shaft and the opening direction E of the groove (the central axis in the cross section perpendicular to the central axis La). Assuming that the angle formed by (the direction from La toward the center of the groove opening) is the rotation angle α in the bending direction of the shaft, the rotation angle α in the bending direction of the shaft is 0 in this cosmetic container 1A with the lid closed. ° (Fig. 2F).

Further, assuming that the distance between the above-mentioned point P and the base portions 41a and 41b of the shaft is the bending amount d of the shaft in a state where the shafts 40a and 40b are not fitted in the groove 20 (FIG. 1), the bending amount d is from 0 mm. It can be as large as 1/2 or less of the shaft diameter L4, and if the angle formed by the central shaft La at the base portions 41a and 41b of the shaft and the central shaft Lb at the tip portions 42a and 42b is the bending angle β, the bending angle is defined as the bending angle β. β can be greater than 0 and tan β can be less than (d / Lp). Here, Lp is the length of the shafts 40a and 40b when the shafts 40a and 40b are linear (FIG. 1). If the bending amount d or the bending angle β is too small, the free stop property cannot be sufficiently exhibited, and if it is too large, the shafts 40a and 40b become difficult to rotate unnecessarily in the groove 20, and the lid 30 is opened and closed. Is difficult, or the shafts 40a and 40b are broken.

(Hinge groove)
On the other hand, the groove 20 is formed so that the opening 21 is located on the bottom surface 12 of the container body 10. The groove 20 extends linearly from one side surface 14a of the container body 10 to the side surface 14b facing the side surface 14a with a constant opening width L1 along the back surface 13 of the container body 10 (FIG. 2C, FIG. 2F). If necessary, the back surface 13 of the container body 10 is provided with slits 15 in the longitudinal direction of the shafts 40a and 40b in order to relax the pressing force by the shafts 40a and 40b (FIG. 2D).

As shown in FIG. 2F, in the cross section perpendicular to the central axis La of the base of the shaft, the shape of the inner surface 22 of the groove 20 is arcuate over the entire length of the groove except for the opening 21, and the bases 41a and 41b of the shaft 40. It has a shape that follows the outer shape of a round bar. The groove width L2 of the arc-shaped portion is formed to be slightly wider than the shaft diameter L4 so that the round bar-shaped portion of the shaft 40 rotates smoothly. On the other hand, the shaft 40 can be fitted into the groove by pushing the shaft 40 from the outside of the groove 20, and once the shaft 40 is fitted into the groove, the shaft 40 cannot be easily pulled out. The portion width L1 is formed to be slightly smaller than the shaft diameter L4. Therefore, the cross-sectional shape of the groove 20 is Ω.

Further, the depth L3 of the groove 20 is larger than the shaft diameter L4, the tips 42a and 42b of the shaft fitted in the groove 20 are located closer to the opening 21 than the bottom side of the groove, and the shafts 40a and 40b are initially located. The tip portions 42a and 42b of the shaft are made to fit in the groove 20 even when the shape is curved.

(Free stop property)
In this cosmetic container 1A, the free-stop property is exhibited by the hinge 2 acting as follows.

First, the hinge 2 is formed by fitting the shaft 40 formed in the lid 30 into the groove 20 formed in the container body 10, and the container body 10 and the lid 30 are connected by the hinge 2. Here, the angle formed by the inner surface 31 of the lid 30 and the bottom surface 12 of the container body 10 is defined as the opening angle θ of the lid. Assuming that the lid 30 is closed with the container body 10 and the lid 30 connected by the hinge 2 and the opening angle θ of the lid is zero, according to the curved shapes of the shafts 40a and 40b of this embodiment, as shown in FIG. 3A. The tip portion 42a of the shaft is displaced from the central shaft La and is located on the opening 21 side in the groove 20. Regarding the point P farthest from the central axis La at the tip portions 42a and 42b of the shaft, the rotation angle α in the bending direction D is zero, and the bending amount d ₀ is the initial bending amount d before fitting the shaft 40 into the groove 20. Is almost equal to. Therefore, in this state, the restoring force generated by linearly deforming the shafts 40a and 40b is not generated. However, when the lid 30 is opened, the shafts 40a and 40b start to be deformed, so that the lid 30 is stable in the closed state.

Next, as shown in FIG. 3B, when the lid 30 is opened at an opening angle θ (θ <90 °), the rotation angle α in the bending direction D also increases. As a result, the tip portions 42a and 42b of the shaft are pressed toward the central shaft La side by the inner surface 22 of the groove 20, and the bending amount d _<90 is smaller than _{the bending amount d 0} when the lid 30 is closed. At this time, the shafts 40a and 40b are closer to a linear shape than the initial curved shape, the inner surface 22 of the groove 20 is pressed by the restoring force, the frictional force between the shafts 40a and 40b and the groove 20 is increased, and the shafts 40a and 40a, The 40b becomes difficult to rotate in the groove, and the opening angle of the lid 30 is maintained by the opening angle θ when the lid 30 is opened. That is, a free stop property can be obtained.

Further, when the lid 30 is opened and the opening angle θ of the lid is 90 ° as shown in FIG. 3C, the rotation angle α in the bending direction D is also 90 °, and the tip portions 42a and 42b of the shaft are the inner surfaces of the groove 20. It is strongly pressed by 22, and the bending amount d ₉₀ of the shaft 40 becomes the minimum at an arbitrary opening angle θ. At this time, the shaft 40 becomes substantially linear, the restoring force of the shaft 40 is maximized, the braking force of the rotation of the shaft 40 in the groove is maximized, and the free stop property is most strongly exhibited.

As shown in FIG. 3D, when the lid 30 is further opened, the shafts 40a and 40b begin to return to the original curved shape, and as shown in FIG. 3E, the opening angle θ = 180 ° of the lid and the rotation angle α in the bending direction. When = 180 °, the bending amount d _{180 becomes substantially equal to the bending amount d 0} when the lid 30 is closed, and the braking force for rotation of the shafts 40a and 40b in the groove is weakened.

As described above, in the cosmetic container 1A of the present embodiment, when the opening angle θ of the lid is 90 ° and its vicinity, the shafts 40a and 40b are strongly pressed by the inner surface 22 of the groove 20 to become linear, and the fleece is formed by the restoring force. The top quality is maximized. On the other hand, when the opening angle θ of the lid is 0 ° and the lid 30 is closed, or when the opening angle θ of the lid is 180 ° and the lid 30 is open, the shafts 40a and 40b have substantially the initial curved shape. The pressing force applied to the shafts 40a and 40b from the inner surface 22 of the groove is minimized at an arbitrary opening angle θ. Therefore, it is possible to prevent plastic deformation due to constant pressing force applied to the shafts 40a and 40b, and the durability of the free stop property is excellent.

As in the cosmetic container 1A described above, when the pressing force applied to the shafts 40a and 40b from the inner surface 22 of the groove is reduced at or near the opening angle θ of 0 °, the closed lid 30 is opened. Engagement mechanisms 3a and 3b (FIG. 1) for engaging the lid 30 and the container body 10 by closing the lid 30 can be provided on the lid 30 and the container body 10 so as not to be opened carelessly.

<Hinge deformation mode>
(Cosmetic container 1B)
In the hinge provided in the cosmetic container of the present invention, the opening angle θ of the lid that obtains free-stop property can be controlled by the bending direction D of the shaft and the opening direction E of the groove. For example, when the lid is closed and when the opening angle of the lid is larger than 90 °, the cosmetic container 1B shown in FIGS. 4 and 5 can be reliably held by the free-stop property. The shafts 40a and 40b may be curved as described above. The shafts 40a and 40b are curved in a plane parallel to the inner surface 31 of the lid in a state where they are not fitted in the groove 20. The base portions 41a and 41b of the shaft have a round bar shape, and the tip portions 42a and 42b of the shaft are curved so as to be away from the central shaft La of the base portions 41a and 41b of the shaft. Therefore, in the cross-sectional view taken along the line BB perpendicular to the central axis La shown in FIG. 4, the bending direction D of the axis is parallel to the inner surface 31 of the lid. The configuration of the cosmetic container 1B other than the bending direction D of the shaft can be the same as that of the cosmetic container 1A described above.

The hinge of the cosmetic container 1B acts as follows. As shown in FIG. 6A, the opening direction E of the groove of the cosmetic container 1B is downward, and the bending direction D of the shaft is the horizontal direction with the lid 30 having a lid opening angle θ of 0 ° closed. At this time, the pressing force received by the shafts 40a and 40b from the inner surface 22 of the groove is the maximum at an arbitrary opening angle θ, the bending amount d ₀ of the shaft is the minimum, and the shafts 40a and 40b are substantially linear. Therefore, the restoring force of the shaft exerts a free-stop property, and it is possible to prevent the closed lid 30 from being unnecessarily opened.

Next, as the lid 30 is opened, the amount of curvature of the shaft gradually increases and the pressing force from the inner surface 22 of the groove weakens. As shown in FIG. 6B, when the opening angle θ of the lid reaches 90 °, the shaft 40a, The bending amount d ₉₀ of the 40b is substantially equal to the initial bending amount d before the shafts 40a and 40b are fitted into the groove 20, and the pressing force from the inner surface 22 of the groove 20 is most reduced.

Further, as the lid 30 is opened, the amount of bending of the shaft decreases, and as shown in FIG. 6C, when the opening angle θ of the lid reaches 180 °, the amount of bending d _{180 of the} shaft is again within an arbitrary opening angle θ. It becomes the minimum, the restoring force of the shafts 40a and 40b becomes the maximum, and the pressing force received by the shafts 40a and 40b from the inner surface 22 of the groove becomes the maximum.

Therefore, according to this cosmetic container 1B, the lid is closed, the opening angle of the lid is smaller than 90 °, and the opening angle of the lid is more than 90 °. The opening angle of the can be maintained.

(Cosmetic container 1C)
From the viewpoint of improving the usability of the mirror when the mirror is provided on the inner surface of the lid of the cosmetic container, it is preferable that the opening angle θ of the lid can be maintained in the range of 90 to 180 °, particularly 90. It is preferable that the opening of the lid can be reliably held when the degree of opening is ~ 120 °, and for that purpose, the shafts 40a and 40b are grooved when the opening angle θ of the lid is preferably 90 to 180 °, more preferably 90 to 120 °. It is preferable to increase the pressing force received from the inner surface 22.

Therefore, for example, as in the hinge of the cosmetic container 1C shown in FIG. 7B, when the opening direction E of the groove is downward and the opening angle θ of the lid is a desired size, the bending direction D of the shaft becomes horizontal. The bending direction D of the shaft in the state where it is not fitted in the groove 20 is determined so that the shafts 40a and 40b are substantially linear. That is, as shown in FIG. 7A, if the bending direction D of the shaft when the lid 30 is closed is shifted by α = θx−90 ° toward the back surface 13 side of the container body with respect to the opening direction E of the groove. good. Here, θx is the opening angle of the lid for which the opening of the lid is desired to be reliably maintained, and is, for example, a certain angle within the range of 90 to 180 °, particularly within the range of 90 to 120 °. As a result, the opening of the lid can be reliably held when the opening angle of the lid is θx. The configuration of the cosmetic container 1C other than the bending direction D of the shaft can be the same as that of the cosmetic container 1A described above.

(Cosmetic container 1D)
The lid 30 is closed to ensure that the lid opening is held at the desired lid opening angle θx (eg, within the range of 90-180 °, especially at some angle within the range of 90-120 °). When the bending direction D of the shaft in the state of being in the state is the direction perpendicular to the inner surface 22 of the lid as in the cosmetic container 1A described above, as shown in FIG. 8A, the opening direction E of the groove is the recess of the container body. It may be shifted by θx−90 ° to the 11 side. As a result, as shown in FIG. 8B, when the opening angle of the lid is θx, the shafts 40a and 40b in the groove 20 become substantially linear, and the pressing force received by the shafts 40a and 40b from the inner surface 22 of the groove is an arbitrary lid. The opening angle θ is the maximum, and the opening of the lid can be reliably maintained. The configuration of the cosmetic container 1D other than the groove opening direction E can be the same as that of the cosmetic container 1A described above.

(Cosmetic container 1E)
In order to widen the range of the opening angle of the lid that can hold the opening of the lid, as shown in FIG. 9, one of the pair of shafts 40a and 40b, 40a, is the same as the shaft 40a of the cosmetic container 1A described above. The shaft 40a is curved from the central portion of the shaft 40a toward the tip portion 42a so that the distance between the shaft 40a and the inner surface 31 of the lid increases, and the other shaft 40b is the same as the shaft 40b of the cosmetic container 1B described above. It can be curved so that the distance between the shaft 40b and the central shaft La increases from the central portion of the shaft toward the tip portion 42b in a plane parallel to the inner surface 31 of the lid. As a result, when the opening angle of the lid is 90 ° on one shaft 40a, the pressing force received by the shaft 40a from the inner surface 22 of the groove is maximized (FIG. 3C), and on the other shaft 40b, the opening angle of the lid is 0 ° and At 180 °, the pressing force received by the shaft 40b from the inner surface 22 of the groove is maximized (FIGS. 6A and 6C). Therefore, by combining the actions of both shafts 40a and 40b, sufficient free-stop property can be obtained regardless of the opening angle of any lid, and the individual shafts 40a and 40b can be connected to the individual shafts 40a and 40b from the inner surface 22 of the groove. Since there is an opening angle of the lid that receives almost no pressing force, it is possible to prevent the shafts 40a and 40b from being plastically deformed and the free stop property from being lowered while the lid is repeatedly opened and closed.

(Cosmetic container 1F, 1G)
In the present invention, the shaft 40 forming the hinge is not limited to the provision of the two shafts 40a and 40b as in the cosmetic container described above. For example, the number of shafts 40 may be one as in the cosmetic container 1F shown in FIG. 10, or four as in the cosmetic container 1G shown in FIG. The number of shafts is preferably a plurality from the viewpoint of reducing the load applied to one shaft, and preferably 4 or less from the viewpoint of simplifying the assembly of the container body 10 and the lid 30.

Further, in the present invention, the curved shape of the shaft is not limited to bending the individual shafts in one plane, and the individual shafts may be curved three-dimensionally.

(Cosmetic container 1H)
In the present invention, the shaft 40 forming a hinge may be formed in the cosmetic container main body 10, and the groove 20 into which the shaft 40 is fitted may be formed in the container main body. For example, as in the cosmetic container 1H shown in FIGS. 12A and 12B, a pair of shafts 40a and 40b are formed on the back side of the container body 10 with a cantilever structure, and a groove 20 for fitting them is formed in the lid 30. You may. In the hinge of the cosmetic container 1H, as shown in the cross-sectional view shown in FIG. 1B, the tip portions 42a and 42b of the shaft are curved toward the recess 11 side of the container body with respect to the base portions 41a and 41b, and the bending direction D of the shaft is The lid 30 is parallel to the inner surface 31 of the lid in the closed state. Further, the opening direction E of the groove 20 formed in the lid 30 is parallel to the inner surface 31 of the lid 30. Therefore, as shown in FIG. 13A, when the opening angle θ of the lid is less than 90 ° and the lid 30 is opened, the amount of curvature d _{<90 of the} shaft gradually becomes smaller and the curved shafts 40a and 40b become linear. As it approaches, the pressing force received by the shafts 40a and 40b from the inner surface 22 of the groove 20 of the lid becomes stronger, and as shown in FIG. 13B, when θ is 90 °, the bending amount d ₉₀ is the smallest and the shafts 40a and 40b are the most. It becomes linear and the pressing force received by the shafts 40a and 40b is maximized. As shown in FIG. 13C, when the opening angle θ of the lid exceeds 90 °, the bending amount d _{> 90} of the shaft gradually increases, the shafts 40a and 40b gradually approach the initial bending amount, and from the inner surface 22 of the groove 20 of the lid. The pressing force received by the shafts 40a and 40b gradually decreases.

In this way, when the curved shaft 40 is integrally formed on the container body 10 and the groove 20 is formed on the lid 30, the groove 10 is formed on the container body 10 and the shaft 40 is formed on the lid 20. Similarly, a free stop property can be obtained depending on the opening angle of the lid.

<Other deformations of the hinge>
A pressing force is applied to the hinge shaft of the cosmetic container of the present invention from the inner wall of the shaft according to the opening angle of the lid, thereby obtaining a free stop property. However, when this pressing force is excessively increased, the shaft is plastically deformed. May reduce the durability of the hinge. Therefore, the cross-sectional shape of the groove can be expanded in the bending direction of the shaft so that the bending amount of the shaft fitted in the groove does not excessively decrease even if the opening angle of the lid changes.

For example, in the above-mentioned cosmetic container 1B, the amount of curvature d of the shaft is reduced most and the pressing force applied to the shaft becomes stronger when the lid is closed (FIG. 6A). In order to relax, the groove width L2 is expanded toward the recess 11 side of the container body 10 with respect to the shaft diameter L4 as shown in FIG. _{As a result, the amount of curvature d 0} when the opening angle of the lid is 0 ° can be increased as compared with the case shown in FIG. 6A, and the pressing force applied to the shafts 40a and 40b can be reduced.

Further, in order to improve the durability of the shaft against changes in the pressing force applied to the shaft as the lid is opened and closed, the shaft bases 41a and 41b have a larger diameter than the tip portions 42a and 42b as shown in FIG. Alternatively, the shafts 40a and 40b may be curved from the base portions 41a and 41b of the shaft.

On the other hand, in order to facilitate the deformation of the shaft 40, as shown in FIG. 16, a slit 43 may be provided in the longitudinal direction of the shaft 40.

As shown in FIG. 17, in order to increase the friction between the inner surface 22 of the groove and the shaft 40 when the shaft 40 rotates in the groove and to facilitate the free stop property, the surface of the shaft 40 is a minute uneven surface. It may be 44.

Further, as shown in FIG. 18, the groove opening 21 may be covered with the groove lid 23. As a result, the shaft 40 can be fitted into the groove 20 with the groove lid 23 removed, and then the groove opening 21 can be closed by the groove lid 23. Therefore, even if the opening width of the groove is widened to facilitate the fitting of the shaft 40 into the groove 20, it is possible to prevent the shaft 40 once fitted into the groove 20 from coming off the groove 20.

It should be noted that the above-mentioned deformation mode of the hinge for controlling the opening angle of the lid for obtaining free stop property and the deformation mode of the hinge for improving the durability of the hinge can be appropriately combined.

1A, 1B, 1C, 1D, 1E, 1F, 1G, 1H Cosmetic container 2 Hinge 3a, 3b Engagement mechanism 10 Container body 11 Recess 12 Bottom surface 13 Back surface 14a, 14b Side surface 15 Slit 20 Groove 21 Opening 22 Inner surface 23 Groove Closure 30 Closure 31 Inner surface 32 Edges 40, 40a, 40b Axis 41a, 41b Base 42a, 42b Tip 43 Slit 44 Concavo-convex surface α Rotation angle in bending direction β Curved angle D Axis bending direction E Groove opening direction d Axis bending Amount L1 Opening width L2 Groove width L3 Groove depth L4 Shaft diameter La Central axis of the axis at the base Lb Central axis of the axis at the tip Lp Length of the axis P The point farthest from the central axis La on the axis θ Of the lid Opening angle

Claims (6)

A cosmetic container in which a resin container body and a resin lid are connected by a hinge. The hinged shaft is integrally resin-molded on the container body or lid, and the groove into which the shaft is fitted is the lid or It is formed linearly on the container body and is curved when the shaft is not fitted in the groove, and the direction of curvature is that the inner surface of the groove presses the shaft when the shaft is fitted in the groove. A cosmetic container in which the tip of the shaft is located on the opening side of the groove with the lid closed so as to reduce when the lid is closed. A cosmetic container in which a resin container body and a resin lid are connected by a hinge. The hinged shaft is integrally resin-molded on the container body or lid, and the groove into which the shaft is fitted is the lid or It is formed in a straight line on the container body and is curved with the shaft not fitted in the groove. A cosmetic container in which the inner surface has the maximum force to press the shaft. The cosmetic container according to claim 1 or 2 , which has a plurality of hinged shafts. The cosmetic container according to claim 3 , which has two hinged shafts and each shaft has a different bending direction. The cosmetic container according to any one of claims 1 to 4 , wherein the shaft forming the hinge has a slit extending in the longitudinal direction thereof. The cosmetic container according to any one of claims 1 to 5 , wherein the base portion of the shaft forming the hinge has a larger diameter than the tip portion thereof.

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