JP2019037706A - Cosmetic container - Google Patents

Abstract

To improve durability of free stopping property by making not only a container body and a lid but also a hinge with a resin, in a cosmetic container of which lid that opens and closes with a hinge has free stopping property.SOLUTION: A cosmetic container 1A includes a resin container body 10 and a resin lid 30 that are connected by a hinge 2. A shaft 40 constituting the hinge 2 is formed of a resin integrally with the container body 10 or lid 30. A groove 20 to which the shaft 40 is fitted is linearly formed in the lid 30 or container body 10. The shaft 40 is curved while not being fitted to the groove 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a plastic cosmetic container having a hinge.

  There is a metal container used for cigarette holders and the like whose lid is opened and closed by a hinge, which can obtain a free stop property that keeps the opening angle of the lid (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 hinge cylinder.

  However, this container requires special equipment for manufacturing a metal shaft that is partially curved, and the manufacturing process becomes complicated. In addition, when this hinge structure is applied to a resin cosmetic container, it becomes complicated to separate the resin lid or 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 hinge shaft are integrally molded with resin, and 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 one in which an inclined surface is formed on the edge of the lid so as to always come into sliding contact with the edge of the cover (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 plastic lid or container body and the metal shaft are separated and discarded. It becomes unnecessary. However, the free stop performance is gradually inferior while the hinge is repeatedly opened and closed, and the degree of opening of the lid may not stop at a desired position.

JP 2001-193337 A JP 2013-66582 A

  It is an object of the present invention to provide a cosmetic container in which a lid that opens and closes by a hinge has a free stop property, and 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. .

  The present inventor, in a cosmetic container in which a resin container body and a resin lid are connected by a hinge, integrally forms a hinge shaft on one of the container body and the lid, and fits the shaft on the other. When the groove is formed, the shaft is formed in a curved shape without being fitted into the groove, and when the groove is formed in a straight line, the shaft is fitted into the groove, depending on the hinge opening / closing angle. In addition, since the initially curved shaft is pressed by the inner surface of the groove and deformed linearly, it is possible to obtain a free stop property in which the opening angle of the lid is maintained by the restoring force of the deformation, and the shaft In the case of a curved shape in the groove, no pressing force is applied to the shaft, so that the shaft hardly undergoes plastic deformation and the durability of free stop performance 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 molded with the container body or the lid, and the shaft is Provided is a cosmetic container in which a groove to be fitted is linearly formed in a lid or a container body, and the shaft is curved in a state where the shaft is not fitted in the groove.

  In the cosmetic container of the present invention, the container main body and the lid are made of resin, and the shaft forming the hinge is integrally molded on one of the container main body and the lid, and the 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 when manufacturing the cosmetic container is reduced, and when the cosmetic container is discarded, the resin lid or the container body and the metal It is no longer necessary to separate the shafts.

  Furthermore, in this cosmetic container hinge, since the shaft fitted in the linear groove is curved in a state where it is not fitted in the groove, the curvature of the shaft in the groove depends on the opening angle of the lid. The degree changes, and the initially curved shaft is pressed by the inner surface of the groove and deformed linearly, or returns to the original curved shape. Here, since the shaft strongly presses the inner surface of the groove due to the restoring force of the shaft as the shaft becomes linear, the shaft becomes difficult 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 the opening angle of the lid, a free-stop property that maintains the opening angle of the lid can be obtained.

  On the other hand, depending on the opening angle of the lid, the shaft in the groove approaches the original 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 performance from being impaired.

Drawing 1 is an exploded perspective view of cosmetics container 1A of an example, its AA arrow line view, and BB sectional view. FIG. 2A is a perspective view of the cosmetic container 1A with the lid open. FIG. 2B is a perspective view of the cosmetic container 1A with the lid closed as seen from the lid side. FIG. 2C is a perspective view of the cosmetic container 1A with the lid closed as viewed from the bottom side of the container body. FIG. 2D is an AA arrow view of the cosmetic container 1A shown in FIG. 2B. 2E is a BB cross-sectional view of the cosmetic container 1A shown in FIG. 2B. 2F is a cross-sectional view taken along the line CC of the cosmetic container 1A illustrated in FIG. 2B. FIG. 3A is a cross-sectional view perpendicular to the central axis of the shaft in the vicinity of the base of the shaft for explaining the operation of the hinge of the cosmetic container 1A. FIG. 3B is a cross-sectional view perpendicular to the central axis of the shaft in the vicinity of the base of the shaft for explaining the operation of the hinge of the cosmetic container 1A. FIG. 3C is a cross-sectional view perpendicular to the central axis of the shaft in the vicinity of the base of the shaft for explaining the operation of the hinge of the cosmetic container 1A. FIG. 3D is a cross-sectional view perpendicular to the central axis of the shaft in the vicinity of the base of the shaft for explaining the operation of the hinge of the cosmetic container 1A. FIG. 3E is a cross-sectional view perpendicular to the central axis of the shaft in the vicinity of the base of the shaft for explaining the operation 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 shaft in the vicinity of the base of the shaft for explaining the operation of the hinge of the cosmetic container 1B. FIG. 6B is a cross-sectional view perpendicular to the central axis of the shaft in the vicinity of the base of the shaft for explaining the operation of the hinge of the cosmetic container 1B. FIG. 6C is a cross-sectional view perpendicular to the central axis of the shaft in the vicinity of the base of the shaft for explaining the operation 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 operation 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 operation 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 operation 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 operation of the hinge of the cosmetic container 1D. FIG. 9 is an exploded perspective view of the cosmetic container 1E, an AA arrow view, and a BB arrow view. 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 operation 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 operation 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 operation of the hinge of the cosmetic container 1H. FIG. 14 is a cross-sectional view of a modification of the hinge of the cosmetic container. FIG. 15 is an exploded perspective view and an AA arrow view of a modified embodiment of the cosmetic container. FIG. 15 is an exploded perspective view of a modified embodiment of the cosmetic container and a front view of the lid. FIG. 17 is an exploded perspective view of a modification 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 addition, in each figure, the same code | symbol represents the same or equivalent component.

<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 its lid open, and FIGS. 2B and 2C are It is a perspective view in the state where the lid of cosmetic container 1A is closed.

  This 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 that is resin-molded integrally with the lid 30. The inner surface 31 of the lid 30 is a mirror surface of a mirror provided as necessary. A groove 20 for fitting the shaft 40 is formed in the container main body 10, and a concave portion 11 used for storing a cosmetic replacement container or applicator is formed in the center of the container main body 10. By inserting the shaft 40 formed on the lid 30 into the groove 20 formed on the container main body 10, the hinge 2 is formed by the shaft 40 and the groove 20, and the container main body 10 and the lid 30 are connected.

  Examples of the resin forming the cosmetic container 1A include ABS, PET, PP, PC, AS (acrylonitrile / styrene copolymer), PCTA (dicarboxylic acid component mainly composed of terephthalic acid and isophthalic acid, and Polyester obtained by polycondensation with a diol component containing 1,4-cyclohexanedimethanoldiol as a main component) can be used, and among them, an ABS resin is preferable from the viewpoint of production.

(Hinge axis)
This cosmetic container 1 </ b> A has a pair of shafts 40 a and 40 b provided so as to substantially follow the edge 32 of the lid 30 as the shaft 40 constituting the hinge 2. One end of each of the pair of shafts 40 a and 40 b has a cantilever structure and is supported symmetrically on the opposite side wall of the lid 30, and the base portions 41 a and 41 b of the shafts 40 a and 40 b near the side walls are the edges 32 of the lid 30. It is a round bar shape 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 center of the shafts 40a and 40b. When the shaft is bent from the center portion in this way, the shafts 40a and 40b are made to be 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 is oblique to the side wall of the lid. The durability of the shafts 40a and 40b against the linear deformation in the groove 20 can be improved.

  In the present invention, the direction of the bending of the shaft 40 can be set according to how much the opening angle of the lid to obtain a free stop property when the lid 30 is opened and closed. In obtaining the top property, it can be set according to the degree of difficulty in rotating the lid.

  As an example, in the cosmetic container 1A of the present embodiment, the shafts 40a and 40b that are not fitted in the groove 20 are directed from the central portion toward the tip portions 42a and 42b, the shafts 40a and 40b, and the inner surface 31 of the lid. Is curved in a plane that is perpendicular to the inner surface 31 of the lid and that includes the center line La of the base portions 41a and 41b of the shaft. Here, in the cross section perpendicular to the central axis La at the base portions 41a and 41b of the shafts 40a and 40b, the point farthest from the central axis La among the shafts 40a and 40b is P, and the direction from the central axis La to the point P Is the bending direction D of the shaft (FIG. 1), and in the state where the shafts 40a and 40b are 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 La to the center of the groove opening) is the rotation angle α of the bending direction of the shaft, in this cosmetic container 1A, the rotation angle α of the bending direction of the shaft is 0 when the lid is closed. ° (Figure 2F).

  Further, in a state where the shafts 40a and 40b are not fitted in the groove 20, if the distance between the above-described point P and the shaft bases 41a and 41b is the shaft bending amount d (FIG. 1), the bending amount d is less than 0 mm. If the angle formed by the central axis La of the shaft base portions 41a and 41b and the central axis Lb of the tip portions 42a and 42b is the bending angle β, the bending angle can be reduced. β is larger than 0 and tan β can be smaller 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 and the bending angle β are too small, the free-stopping property cannot be exhibited sufficiently. On the other hand, if the bending amount d and the bending angle β are too large, the shafts 40a and 40b are difficult to rotate unnecessarily in the groove 20, Or the shafts 40a and 40b break.

(Hinge groove)
On the other hand, the groove 20 is formed such that the opening 21 is located on the bottom surface 12 of the container body 10. The groove 20 extends along the back surface 13 of the container body 10 with a constant opening width L1 from the one side surface 14a of the container body 10 to the side surface 14b facing the side surface 14a (FIG. 2C, FIG. 2). 2F). In addition, a slit 15 is provided on the back surface 13 of the container body 10 in the longitudinal direction of the shafts 40a and 40b in order to relieve 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 portion of the shaft, the shape of the inner surface 22 of the groove 20 is an arc shape over the entire length of the groove except for the opening 21, and the base portions 41a and 41b of the shaft 40 are formed. It has a shape along the outer shape of the round bar. The groove width L2 of the arc-shaped portion is slightly wider than the shaft diameter L4 so that the round bar-shaped portion of the shaft 40 rotates smoothly. On the other hand, by pressing the shaft 40 from the outside of the groove 20, the shaft 40 can be fitted into the groove, and once the shaft 40 is fitted into the groove, the shaft 40 is difficult to be removed. The part width L1 is formed slightly smaller than the shaft diameter L4. Therefore, the cross-sectional shape of the groove 20 is an Ω shape.

  Further, the depth L3 of the groove 20 is larger than the shaft diameter L4, the tip portions 42a and 42b of the shafts 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 The shaft tip portions 42 a and 42 b are also accommodated in the groove 20 even when the shape is curved.

(Free stop)
In this cosmetic container 1 </ b> A, the hinge 2 acts as follows to exhibit the free stop property.

First, the hinge 2 is configured by fitting the shaft 40 formed on the lid 30 into the groove 20 formed on the container body 10, and the container body 10 and the lid 30 are connected by the hinge 2. Here, an angle formed by the inner surface 31 of the lid 30 and the bottom surface 12 of the container body 10 is defined as an opening angle θ of the lid. When the lid 30 is closed in a state where the container body 10 and the lid 30 are connected by the hinge 2 and the opening angle θ of the lid is zero, according to the curved shape of the shafts 40a and 40b of this embodiment, as shown in FIG. Further, the tip end portion 42a of the shaft is shifted from the central axis La and is positioned 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 the shaft 40 is fitted into the groove 20. Is approximately equal to Therefore, in this state, no restoring force is generated by deforming the shafts 40a and 40b in a straight line. However, since the deformation of the shafts 40a and 40b starts when the lid 30 is opened, 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. Thus, the tip portion 42a of the shaft, 42b is pressed against the central axis La side by the inner surface 22 of the groove 20, the bend 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 straight line than the original curved shape, and the inner surface 22 of the groove 20 is pressed by the restoring force, and the frictional force between the shafts 40a and 40b and the groove 20 is increased. 40b becomes difficult to rotate in the groove, and the opening angle of the lid 30 is maintained at the opening angle θ when the lid 30 is opened. That is, free stop property can be obtained.

Further, when the lid 30 is opened and the lid opening angle θ is 90 ° as shown in FIG. 3C, the rotation angle α in the bending direction D is also 90 °, and the shaft tip portions 42 a and 42 b are formed on the inner surface of the groove 20. 22, the bending amount d ₉₀ of the shaft 40 is minimized at an arbitrary opening angle θ. At this time, the shaft 40 is 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 exhibited most strongly.

As shown in FIG. 3D, when the lid 30 is further opened, the shafts 40a and 40b start to return to the original curved shape, and as shown in FIG. 3E, the lid opening angle θ = 180 ° and the rotation angle α in the bending direction. = 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 turning the shafts 40a and 40b in the groove is weakened.

  As described above, in the cosmetic container 1A of the present embodiment, the shafts 40a and 40b are strongly pressed and linearly formed by the inner surface 22 of the groove 20 in the vicinity of the opening angle θ of the lid 90 ° and in the vicinity thereof. The top is maximized. On the other hand, when the lid opening angle θ is 0 ° and the lid 30 is closed, or when the lid opening angle θ is 180 ° and the lid 30 is open, the shafts 40a and 40b have substantially the original 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. Accordingly, it is possible to prevent plastic deformation due to the 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 In order to prevent the lid 30 from being opened carelessly, the lid 30 and the container body 10 can be provided with engagement mechanisms 3a and 3b (FIG. 1) for engaging the lid 30 and the container body 10 by closing the lid 30.

<Deformation mode of hinge>
(Cosmetic container 1B)
The hinge included in the cosmetic container of the present invention can control the opening angle θ of the lid for obtaining a free stop property by the bending direction D of the shaft and the opening direction E of the groove. For example, when the lid is closed and the opening angle of the lid is larger than 90 °, the cosmetic container 1B shown in FIG. 4 and FIG. The shafts 40a and 40b may be curved as described above. The shafts 40 a and 40 b are curved in a plane parallel to the inner surface 31 of the lid when not fitted into the groove 20. The shaft bases 41a and 41b have a round bar shape, and the shaft tip portions 42a and 42b are curved so as to be away from the central axis La of the shaft bases 41a and 41b. Therefore, in the BB cross-sectional view perpendicular to the central axis La shown in FIG. 4, the axis bending direction D is parallel to the inner surface 31 of the lid. The cosmetic container 1B may have the same configuration as the above-described cosmetic container 1A except for the bending direction D of the shaft.

The hinge of this 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 shaft bending direction D is horizontal with the lid 30 having the lid opening angle θ of 0 ° closed. At this time, the pressing force that the shafts 40a, 40b receive from the inner surface 22 of the groove at an arbitrary opening angle θ is the maximum, the bending amount d ₀ of the shaft is the minimum, and the shafts 40a, 40b are substantially linear. Therefore, free stop performance is exhibited by the restoring force of the shaft, and the closed lid 30 can be prevented from being unnecessarily opened.

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

When the lid 30 is further 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 of the shaft d ₁₈₀ again becomes within an arbitrary opening angle θ. The restoring force of the shafts 40a and 40b is maximized, and the pressing force received by the shafts 40a and 40b from the inner surface 22 of the groove is maximized.

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

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

  Therefore, for example, like 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 is horizontal. Thus, the bending direction D of the shaft in a 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 axis bending direction D 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 an opening angle of the lid for which the opening of the lid is to be surely held, and is, for example, an angle within a range of 90 to 180 °, particularly within a range of 90 to 120 °. Thus, the opening of the lid can be reliably held at the opening angle θx of the lid. The cosmetic container 1C can also have the same configuration as the above-described cosmetic container 1A except for the axial bending direction D.

(Cosmetic container 1D)
The lid 30 is closed to ensure that the lid opening can be held at the desired lid opening angle θx (for example, some angle within the range of 90-180 °, particularly 90-120 °). When the bending direction D of the shaft in the state of being in the direction perpendicular to the inner surface 22 of the lid as in the above-described cosmetic container 1A, as shown in FIG. The angle 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 are 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 maximum opening angle θ is obtained, and the opening of the lid can be reliably held. The cosmetic container 1D can also have the same configuration as the above-described cosmetic container 1A except for the groove opening direction E.

(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 is similar to the shaft 40a of the cosmetic container 1A described above. In addition, the second shaft 40b is curved so that the distance between the shaft 40a and the inner surface 31 of the lid increases from the central portion of the shaft 40a toward the distal end portion 42a, and the other shaft 40b is similar to the shaft 40b of the cosmetic container 1B described above. In a plane parallel to the inner surface 31 of the lid, it can be curved so that the distance between the shaft 40b and the central axis La increases from the central portion of the shaft toward the distal end portion 42b. As a result, the pressing force that the shaft 40a receives from the inner surface 22 of the groove when the opening angle of the lid is 90 ° is maximized on one shaft 40a (FIG. 3C), and the opening angle of the lid is 0 ° on the other shaft 40b. The pressing force that the shaft 40b receives from the inner surface 22 of the groove at 180 ° is maximized (FIGS. 6A and 6C). Therefore, by combining the actions of both the shafts 40a and 40b, a sufficient free stop property can be obtained at any opening angle of the lid, and the individual shafts 40a and 40b can be provided from the inner surface 22 of the groove. Since there is an opening angle of the lid that hardly receives the pressing force, it is possible to prevent the shafts 40a and 40b from being plastically deformed and repeating the opening and closing of the lid, thereby reducing the free stop performance.

(Cosmetic containers 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 the shafts 40 may be one as in the cosmetic container 1F illustrated in FIG. 10, or may be four as in the cosmetic container 1G illustrated in FIG. The number of shafts is preferably plural from the viewpoint of reducing the load applied to one shaft, and is preferably four or less from the viewpoint of simplifying the assembly of the container body 10 and the lid 30.

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

(Cosmetic container 1H)
In this invention, the axis | shaft 40 which makes a hinge may be formed in the cosmetics container main body 10, and the groove | channel 20 which fits the axis | shaft 40 may be formed in a container main body. For example, a pair of shafts 40a and 40b are formed in a cantilever structure on the back side of the container body 10 like a cosmetic container 1H shown in FIGS. 12A and 12B, and a groove 20 is formed in the lid 30 for fitting them. May be. In the hinge of this cosmetic container 1H, as shown in the cross-sectional view of FIG. 1B, the distal end portions 42a and 42b of the shaft are curved toward the concave portion 11 side of the container body with respect to the base portions 41a and 41b, and the bending direction D of the shaft is It is parallel to the inner surface 31 of the lid when the lid 30 is closed. 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 lid opening angle θ is less than 90 ° and the lid 30 is opened, the curved amount d _{<90 of the} shaft gradually decreases and the curved shafts 40a and 40b become linear. As shown in FIG. 13B, the pressing force received by the shafts 40a and 40b from the inner surface 22 of the lid groove 20 becomes stronger, and when θ is 90 °, the bending amount d ₉₀ is minimized 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, 40b gradually approach the initial bending amount, and the inner surface 22 of the groove 20 of the lid The pressing force received by the shafts 40a and 40b gradually decreases.

  As described above, 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, free stop performance can be obtained according to the opening angle of the lid.

<Other variations of the hinge>
According to the opening angle of the lid, a pressing force is applied to the hinge shaft of the cosmetic container of the present invention from the inner wall of the shaft, thereby obtaining a free stop property. When this pressing force is excessively increased, the shaft is plastically deformed. And the durability of the hinge may be reduced. Therefore, the cross-sectional shape of the groove can be expanded in the bending direction of the shaft so that the amount of bending of the shaft fitted in the groove is not excessively reduced even if the opening angle of the lid changes.

For example, in the cosmetic container 1B described above, the shaft bending amount d is reduced most with the lid closed, and the pressing force received by the shaft is strong (FIG. 6A). In order to relax, as shown in FIG. 14, the groove width L2 is expanded to the concave portion 11 side of the container body 10 from the shaft diameter L4. Thereby, the bending amount 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 the change in the pressing force applied to the shaft as the lid is opened and closed, the base portions 41a and 41b of the shaft have a larger diameter than the tip portions 42a and 42b as shown in FIG. The shafts 40a and 40b may be curved from the shaft bases 41a and 41b.

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

  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 make it easy to obtain a free stop property, as shown in FIG. 44 may be used.

  As shown in FIG. 18, the groove opening 21 may be covered with a groove lid 23. Thereby, it is possible to fit the shaft 40 into the groove 20 with the groove lid 23 removed, and then close the groove opening 21 with the groove lid 23. Therefore, the shaft 40 once fitted in the groove 20 can be prevented from being detached from the groove 20 even if the width of the groove opening portion is widened to facilitate the fitting of the shaft 40 into the groove 20.

  In addition, the deformation | transformation aspect of the hinge for controlling the opening angle of the lid | cover which acquires the free stop property mentioned above, and the deformation | transformation aspect of hinges, such as improving the durability of a hinge, can be combined suitably.

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 Open portion 22 Inner surface 23 Groove Lid 30 Lid 31 Inner surface 32 Edge 40, 40a, 40b Shaft 41a, 41b Base 42a, 42b Tip 43 Slit 44 Uneven surface α Curved rotation angle β Curved angle D Shaft direction E Groove opening direction d Shaft curve Amount L1 Opening width L2 Groove width L3 Groove depth L4 Shaft diameter La Center axis of shaft at base portion Lb Center axis of shaft at tip portion Lp Length of shaft P Point farthest from center axis La at axis θ Cover of lid Opening angle

Claims (7)

  A cosmetic container in which a resin container body and a resin lid are connected by a hinge, wherein a shaft forming the hinge is integrally molded with the container body or the lid, and a groove into which the shaft is fitted has a lid or A cosmetic container that is linearly formed on the container body and is curved in a state where the shaft is not fitted in the groove.   The tip of the shaft is located on the opening side of the groove with the lid closed so that the force with which the inner surface of the groove presses the shaft with the shaft fitted in the groove is reduced when the lid is closed. The cosmetic container according to claim 1, wherein the shaft is curved as described above.   The cosmetic container according to claim 1 or 2, wherein the opening angle of the lid with respect to the bottom surface of the container body is 90 to 180 °, and the shaft is curved so that the force with which the inner surface of the groove presses the shaft is maximized.   The cosmetic container according to claim 1, wherein the cosmetic container has a plurality of hinge shafts.   The cosmetic container according to claim 4, wherein the cosmetic container has two shafts forming a hinge and each shaft has a different bending direction.   The cosmetic container according to any one of claims 1 to 5, wherein the shaft forming the hinge has a slit extending in a longitudinal direction thereof. The cosmetic container according to any one of claims 1 to 6, wherein a base portion of a shaft forming a hinge has a larger diameter than a tip portion thereof.

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