Decorative member

Abstract

To exhibit a decorative effect even without using a hologram film or the like.SOLUTION: A decorative member comprises an inside member 11, and an outside member 12 covering an upper surface of the inside member and having light transmissivity. The upper surface of the inside member is formed of a material with a lower visible light transmittance than the outside member. A lower surface 12a of the outside member, which abuts against or is close to the upper surface of the inside member, has protrusion parts 13 extending in one direction X when viewed from a vertical direction and connected in another direction Y perpendicular to the one direction when viewed from the vertical direction. In a vertical cross section along the other direction, the protrusion parts have a downwardly projecting curved shape. A pitch P of the protrusion parts along the other direction is 0.1 mm or less, and a vertical size T of the protrusion parts is 0.01 mm or less.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a decorative member. [Background technology]

[0002] BACKGROUND ART Conventionally, decorative members in which a hologram film is provided on a material to be processed have been known, as shown in Patent Document 1 below, for example. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-242265 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there is a demand for a decorative member that can provide a decorative effect without using a hologram film or the like.

[0005] The present invention provides a decorative member that can exhibit decorative effects without using a hologram film or the like. [Means for solving the problem]

[0006] A decorative member according to one aspect of the present invention comprises an inner member and an outer member that covers the upper surface of the inner member and is optically transparent, wherein the upper surface of the inner member is formed of a material that has a lower light transmittance for visible light than the outer member, and the outer member has a lower surface that abuts or is close to the upper surface of the inner member, and protrusions that extend in one direction when viewed from the vertical direction are provided in a series in another direction that is perpendicular to the one direction when viewed from the vertical direction, and the protrusions have a downwardly projecting curved shape when viewed in a vertical cross section along the other direction, and the pitch of the protrusions along the other direction is 0.1 mm or less, and the vertical size of the protrusions is 0.01 mm or less.

[0007] On the underside of the outer member, protrusions extending in one direction when viewed from the vertical direction are provided, and are connected in another direction perpendicular to the one direction when viewed from the vertical direction. When viewed in a vertical cross section along the other direction, the protrusions have a curved shape that protrudes downward, and the pitch interval of the protrusions along the other direction is 0.1 mm or less, and the size of the protrusions in the vertical direction is 0.01 mm or less. Therefore, when incident light passes through the outer member from above to below, it is reflected by the upper surface of the inner member and is incident on the lower surface of the outer member, where it is refracted at each protrusion, so that the outer member appears rainbow-colored from above, or the color changes when the viewing direction is changed, thereby achieving a decorative effect without using a hologram film or the like. The plurality of protrusions may be provided on the underside of the outer member so as to reveal letters, figures, symbols, etc. when viewed from above and below.

[0008] The upper surface of the inner member may be formed of a metal film.

[0009] Since the upper surface of the inner member is formed of a metal film, it is possible to provide gloss to the upper surface of the inner member, which intensifies the reflected light from the upper surface of the inner member and ensures the decorative effect. [Effects of the Invention]

[0010] According to one aspect of the present invention, a decorative effect can be achieved without using a hologram film or the like. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is a top view of a decorative member shown as an embodiment. [Figure 2] FIG. 2 is a cross-sectional view taken along the line II-II in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A decorative member according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the decorative member 1 according to this embodiment includes an inner member 11 and an outer member 12 that covers the upper surface of the inner member 11 and has optical transparency. In the illustrated example, the inner member 11 and the outer member 12 are each formed of a synthetic resin material in a cylindrical shape with a top, and the inner member 11 is fitted and fixed inside the outer member 12. The decorative member 1 serves as a cap. Note that the decorative member 1 may also be, for example, a cylindrical container body with a bottom.

[0013] The upper surface of the inner member 11 is formed of a material that has a lower visible light transmittance than the outer member 12 . The visible light transmittance of the upper surface of the inner member 11 is 10% or less, and preferably 3% or less. In this embodiment, the visible light transmittance of the upper surface of the inner member 11 is 0%. The light transmittance can be measured in accordance with JIS K7375 using an ultraviolet-visible-near-infrared spectrophotometer (UV-3150 manufactured by Shimadzu Corporation).

[0014] As shown in FIG. 2, the inner member 11 includes a cylindrical main body 11a having a top and a metal film 11b provided on the upper surface of the top wall of the cylindrical main body 11a. The cylindrical main body 11a is made of, for example, polypropylene or the like. The cylindrical main body 11a may or may not be optically transparent. The metal film 11b forms the upper surface of the inner member 11. The metal film 11b is made of, for example, an aluminum alloy or the like. The metal film 11b is fixed to the upper surface of the top wall of the cylindrical main body 11a by vapor deposition.

[0015] The inner member 11 may be formed only of the non-light-transmitting cylindrical body 11a without the metal film 11b. The non-light-transmitting cylindrical body 11a may be formed of a synthetic resin material containing a colorant. The metal film 11b may be adhered to the upper surface of the top wall of the cylindrical body 11a.

[0016] The outer member 12 has a lower surface 12a that abuts against or is close to the upper surface of the inner member 11, and is provided with protrusions 13 that extend in one direction X when viewed from the top-bottom direction and are connected in another direction Y that is perpendicular to the one direction X when viewed from the top-bottom direction. The protrusions 13 have a curved shape that protrudes downward when viewed from a vertical cross section along the other direction Y. When viewed from a vertical cross section along the other direction Y, the multiple protrusions 13 are all the same size and shape. The multiple protrusions 13 are provided on the lower surface 12a of the outer member 12 so as to represent letters, figures, symbols, etc. when viewed from the top-bottom direction. The portion of the inner surface of the cavity of the mold for injection molding the outer member 12 where the protrusions 13 are formed can be formed using, for example, a ball end mill of a machining center.

[0017] The pitch interval P of the protrusions 13 along the other direction Y is, for example, greater than 0 mm and less than 0.1 mm, preferably greater than 0.01 mm and less than 0.08 mm. The vertical dimension T of the protrusions 13 is, for example, greater than 0 mm and less than 0.01 mm, preferably greater than 0.001 mm and less than 0.005 mm. The radius of curvature R of the protrusions 13 in a vertical cross section along the other direction Y is, for example, greater than 0.05 mm and less than 0.2 mm, preferably greater than 0.05 mm and less than 0.1 mm. The vertical size T of the protrusion 13 is smaller than the pitch P and the radius of curvature R. The radius of curvature of the portion of the underside 12a of the outer member 12 located between adjacent protrusion portions 13 in the other direction Y, when viewed in the vertical cross section, is, for example, 0.05 mm or more and 0.2 mm or less, preferably 0.05 mm or more and 0.1 mm or less.

[0018] A protrusion 14 is formed on the lower surface 12a of the outer member 12, protruding downward and resembling a letter, figure, symbol, or the like when viewed from above and below, as shown in FIG. 1 . The vertical distance between the lower surface of the protrusion 14 and the upper surface of the inner member 11 is, for example, 0 mm or more and 10 mm or less. A distance of 5 mm can achieve a more decorative effect. In the illustrated example, the protrusion 14 resembles the letter "A" when viewed from above and below. Note that the protrusion 14 does not necessarily have to be formed on the lower surface 12a of the outer member 12. A plurality of protruding portions 13 are formed over the entire area of ​​the lower surface of the protruding portion 14 .

[0019] The outer member 12 is made of, for example, polypropylene. The material from which the outer member 12 is made is not particularly limited as long as it can transmit visible light, but for example, the haze value, which indicates the degree of cloudiness, is preferably 30% or less, and more preferably 1.0% or less. The haze value can be measured using a color difference meter (SZ-Σ80-OS manufactured by Nippon Denshoku Industries Co., Ltd.).

[0020] As described above, in the decorative member 1 according to this embodiment, the lower surface 12a of the outer member 12 is provided with the protrusions 13 extending in one direction X when viewed from the vertical direction, and the protrusions 13 are arranged in a row in the other direction Y that is perpendicular to the one direction X when viewed from the vertical direction, and the protrusions 13 have a curved shape that protrudes downward when viewed in a vertical cross section along the other direction Y, and the pitch interval P of the protrusions 13 along the other direction Y is 0.1 mm or less, and the size T of the protrusions 13 in the vertical direction is 0.01 mm or less. Therefore, when incident light that passes through the outer member 12 from above to below is reflected by the upper surface of the inner member 11 and enters the lower surface 12a of the outer member 12, it is refracted at each protrusion portion 13, and the outer member 12 appears, for example, rainbow-colored from above, or the color changes when the viewing direction is changed to the other direction Y, thereby achieving a decorative effect without using a hologram film or the like.

[0021] Since the upper surface of the inner member 11 is formed of the metal film 11b, it is possible to provide gloss to the upper surface of the inner member 11, and the reflected light from the upper surface of the inner member 11 becomes stronger, thereby ensuring the decorative effect.

[0022] The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.

[0023] For example, the plurality of protrusions 13 may be provided over the entire area of ​​the lower surface 12a of the outer member 12.

[0024] In addition, within the scope of the spirit of the present invention, it is possible to replace the components in the above-described embodiments with well-known components as appropriate, and the above-described embodiments and the above-described variations may be combined as appropriate. [Explanation of symbols]

[0025] 1 Decorative materials 11 Inner member 11b Metal film 12 Outer member 12a Underside of outer member 13 Projection part P pitch interval T Vertical direction X one direction Y other direction

Claims

1. An inner member; an outer member that covers an upper surface of the inner member and has optical transparency; an upper surface of the inner member is formed of a material having a lower visible light transmittance than the outer member; The outer member has a lower surface that is in contact with or close to the upper surface of the inner member, and protrusions extending in one direction as viewed from the vertical direction are provided in a row in another direction perpendicular to the one direction as viewed from the vertical direction, The protrusion portion has a curved shape that protrudes downward in a vertical cross section along the other direction, The pitch interval of the protrusions along the other direction is 0.1 mm or less, The decorative member has a vertical dimension of the protrusions of 0.01 mm or less.

2. The decorative member according to claim 1 , wherein the upper surface of the inner member is formed of a metal film.

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