JP2008286391A - Ornament body and its manufacturing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inexpensive ornament body and its manufacturing method, which easily changes its specification, decreases the risk of deteriorating outward appearance by preventing a gap from occurring between a frame and the ornament body, and also decreases the risk of its appearance and color tone changing even with long time use. <P>SOLUTION: The ornament body 10 is composed of a silicone rubber workpiece 11, a colorless layer combined with the silicone rubber workpiece 11, a carrier layer 13 bonded to the colorless layer, a double-faced fixing tape 14 stuck to the carrier layer 13, and an optional mold release layer removably stuck to the double-faced tape 14. A required number of the ornament bodies 10 are tightly fitted in screw holes of a cellular phone, and the screws are covered, to improve thereby the designability and the appearance, which brings out luster of affecting expensive-looking and high grade-looking. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a decorative body provided in a mobile phone, a PDA, a game machine, a digital camera, and the like, and a manufacturing method thereof.

  The foldable mobile phone 1 shown in FIGS. 15 and 16, the foldable game machine 2 shown in FIG. 17, and the digital camera 3 of FIG. 18 are configured by a housing 4 using various materials typified by resin. Although various members such as a printed circuit board are built in, the decorative body 10 is one of the important members as in the case 4.

This type of decorative body 10 is formed into a predetermined shape using, for example, a resin or urethane elastomer, and colored so as not to cause an uncomfortable feeling with the appearance of the foldable mobile phone 1, game machine 2, and digital camera 3. By attaching to the screw hole 5 of the case 4 of the mobile phone 1, the case 4 of the game machine 2, and the screw hole 5 of the case 4 of the digital camera 3, the assembly screw is covered so that the design is possible. This prevents the occurrence of collision noise when folding the body as a cushion or as a cushion (see Patent Documents 1 and 2).
JP 2006-73599 A JP 2002-349532 A

Since the conventional decorative body 10 is formed using a resin or a urethane elastomer as described above, there are the following problems.
First, in the case where the decorative body 10 is made of resin, a dedicated mold must be newly produced each time the model of the mobile phone 1 or the like is changed. In addition, the surface may be required to be embossed, but this will affect the mold releasability, making it difficult to apply freely as designed, resulting in high costs and easy specification changes. There is no problem.

  Further, when the decorative body 10 is made of a urethane-based elastomer having flexibility or elasticity, the appearance can be improved by tightly fitting the screw holes 5 of the housing 4 without any gaps. In the case of a resin that does not have flexibility or elasticity, it is necessary to design so that a certain degree of clearance can be secured. Therefore, when the decorative body 10 is inserted into the screw hole 5 of the housing 4, a gap may be generated between the screw hole 5 and the decorative body 10, which may deteriorate design and appearance.

  Further, when the decorative body 10 is made of urethane elastomer, it is excellent in durability, but lacks chemical resistance and light resistance. Therefore, the use of the mobile phone 1 or the like in a place where coffee, oil, alcohol or the like exists, Long-term use of the telephone 1 or the like may change the appearance and color tone and impair the beauty.

  The present invention has been made in view of the above, facilitating the change of specifications, preventing the occurrence of a gap between the housing and the decorative body, reducing the possibility of deteriorating appearance, and, for example, for long-term use. Another object of the present invention is to provide an inexpensive decorative body and a method for producing the same that are less likely to change the appearance and color tone.

In order to solve the above-described problems, the present invention includes a silicone rubber processed product and an achromatic layer having a total light transmittance of less than 5% combined with the silicone rubber processed product, and is provided in a casing of an electronic device. Because
The processed silicone rubber is characterized by being processed by adding 0.01 to 2 parts by weight of an inorganic pigment in which base oxide flakes are coated with a metal oxide to silicone rubber.

A carrier layer bonded to the achromatic layer can be provided.
Moreover, it is good to provide the double-sided adhesive layer adhered to either an achromatic layer or a carrier layer.

In the present invention, in order to solve the above-mentioned problem, a method for producing a decorative body according to claim 1, 2, or 3,
A compound is prepared by adding 0.01 to 2 parts by weight of an inorganic pigment having a base flake coated with a metal oxide to a silicone rubber, a vulcanizing agent, and a colorant, and this compound is vulcanized and molded. The achromatic layer is bonded, and then the molded product and the achromatic layer are processed into a predetermined shape.

  Here, in the claims, the silicone rubber processed material in the claims can be a plane circle, an ellipse, a rectangle, a polygon, a C-shape, an I-shape, an L-shape, a U-shape, various types as necessary. It can be formed in a predetermined shape such as a symbol. The electronic device includes at least a portable information terminal typified by a mobile phone, a PDA, a game machine, a digital camera, and the like. Further, the carrier layer is not particularly limited to a plurality.

  According to the present invention, there is an effect that the specification can be easily changed and the possibility that a gap is generated between the housing and the decorative body can be prevented and the appearance may be deteriorated. In addition, there is an effect that it is possible to provide an inexpensive decorative body that is less likely to change the appearance and color tone even when used for a long time. In addition, the combination of processed silicone rubber and an achromatic layer allows the regular multiple reflection effect of inorganic pigments to be used, and in addition to simple colors, it reproduces a metallic glossy design with little change over time. Excellent design and design can be obtained.

If a carrier layer bonded to the achromatic layer is provided, the necessary rigidity can be imparted to the decorative body by changing the material, thickness, number, etc. of the carrier layer.
Furthermore, if a double-sided adhesive layer that adheres to either the achromatic layer or the carrier layer is provided, the decorative body can be easily attached to the casing of the electronic device, and the decorative body can be removed with a simple configuration. It becomes possible to prevent.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. As shown in FIGS. 1 to 7 and the like, a decorative body 10 according to the present embodiment includes a silicone rubber processed product 11 having a good touch and the silicone. A thin achromatic layer 12 combined with the rubber processed product 11, a thin carrier layer 13 bonded to the achromatic layer 12, a thin double-sided adhesive tape 14 for fixing to the carrier layer 13, and the double-sided adhesive tape 14 And an optional release layer 15 that is releasably adhered to the casing 4, which is provided from the outside in the casing 4 of the mobile phone 1 or the like that is a small electronic device, and is necessary for the screw holes 5 for assembly of the casing 4. By tightly fitting, the screw is covered to adjust the design and appearance, and a metallic luster that brings out a sense of luxury and high quality is exhibited.

  As shown in FIGS. 1 to 3, 6, etc., the processed silicone rubber 11 is made of, for example, an inorganic pigment in which a base oxide flake is coated with a metal oxide on a flexible or elastic silicone rubber of 0.01 to By adding 2 parts by weight, it is formed into a plane substantially triangular shape, a plane substantially square shape or the like whose corners are chamfered, and has a hardness of 20 Hs to 85 Hs, preferably 80 Hs ± 5 Hs.

  When it is desired that a user or a third party visually recognize and grasp the processed silicone rubber 11 as a resin processed product, the surface thereof is appropriately gloss-treated. The hardness of this silicone rubber processed product 11 is in the range of 20Hs to 85Hs. When the hardness is less than 20Hs, it is difficult to obtain the product because there is almost no product. It is because it comes and it becomes easy to tear.

  Silicone rubbers include, for example, silicone elastomers that are excellent in heat resistance, cold resistance, chemical resistance, light resistance, weather resistance, compression set characteristics, embossing characteristics, etc., and are colorless and chromatic (red, blue, orange, etc.) ), Used in a state of being colored in an achromatic color (black or the like). In addition, examples of the base flakes include pulverized mica that is a natural material, alumina, silica, and glass that are artificial materials, and those that cover the base flake include titanium oxide and oxide. Examples thereof include metal oxides such as iron, tin, antimony, and silicon, and combinations thereof, and the thickness can be appropriately changed.

  The inorganic pigment is composed of, for example, a pearl pigment or an effect pigment that contributes to the formation of metallic luster, and is added in an amount of 0.01 to 2 parts by weight, preferably 0.04 to 0.2 parts by weight. The reason why 0.01 to 2 parts by weight is added is that a sufficient metallic design cannot be obtained when the addition amount is less than 0.01 parts by weight. On the contrary, when the amount exceeds 2 parts by weight, the transparency of the silicone rubber is lost and concealed, and the regular multiple reflection effect necessary for obtaining a metallic gloss is reduced.

  The achromatic layer 12 is made of, for example, a black thin PET film having a low light transmittance, a polycarbonate, an acrylic resin sheet, an achromatic colored silicone rubber sheet, and the like, and has a total light transmittance of less than 5%. The black layer achromatic layer 12 has a total light transmittance of less than 5% because, when the total light transmittance exceeds 5%, the regular multiple reflection effect required to obtain a metallic gloss is reduced. Because it invites.

  As the carrier layer 13, for example, a clear thin PET film is used as shown in FIG. 2 and the like, and functions to ensure the rigidity of the decorative body 10. Further, as the double-sided tape 14, as shown in FIG. 3 and the like, for example, a white translucent thin acrylic tape is raised, and the function of sticking to the head of the screw screwed into the screw hole 5 of the housing 4 is provided. To do. As the release layer 15, for example, a clear thin PET film is used as shown in FIGS. 4 and 5, and is used as a mount during manufacture.

  In the above, when the decorative body 10 is manufactured, first, 0.01 to 2 parts by weight of an inorganic pigment having a base flake coated with a metal oxide is added to a silicone rubber, a vulcanizing agent, and a colorant. A temporary sheet 16 to be the silicone rubber processed product 11 is formed, the sheet 16 which is the blend is cut into a predetermined size, and the sheet 16 is hot-pressed and vulcanized. The amount of the colorant added at this time is preferably 0.001 to 4 parts by weight from the viewpoint of contributing to the formation of metallic luster.

  After the sheet 16 is hot-pressed and vulcanized in this way, a secondary vulcanization is performed to form a complete sheet 16, and the achromatic layer 12 is adhered to the achromatic layer 12 on the sheet 16 with an adhesive. The carrier layer 13 and the double-sided tape 14 are sequentially laminated and bonded, and then the sheet 16, the achromatic layer 12, the carrier layer 13, and the laminated body 17 of the double-sided tape 14 are processed into a predetermined shape and size by punching or the like. If so, a plurality of decorative bodies 10 can be manufactured. After the plurality of decorative bodies 10 are manufactured, the plurality of decorative bodies 10 can be transported or shipped by arranging them in a predetermined pattern on the release layer 15.

  According to the above configuration, since the decorative body 10 is not made of resin, it is not necessary to newly manufacture a dedicated expensive mold every time the model of the mobile phone 1 or the like is changed. Therefore, the cost can be increased and the specification can be easily changed. In addition, since the decorative body 10 is made of a silicone elastomer having flexibility and elasticity, embossing is facilitated, and there is no gap between the screw hole 5 of the housing 4 and the decorative body 10. There is no risk of deterioration in sex or appearance.

  In addition, since the decorative body 10 is not a urethane elastomer, but is made of a silicone elastomer having excellent chemical resistance, light resistance, weather resistance, compression set characteristics, etc., the mobile phone 1 etc. in a place where coffee, oil, alcohol, etc. are present And long-term use of the mobile phone 1 or the like, there is no risk that the appearance and color tone will change and the aesthetics will be impaired.

  In addition, according to the present embodiment, it is possible to reproduce metallic glossy expression with little change over time and obtain excellent design and design. When this point is explained in detail, when a film printed in a metallic tone and a urethane-based elastomer are laminated, the change over time is large, and thus it may be difficult to reproduce a glossy expression in a metallic tone over a long period of time. There is.

  On the other hand, according to the present embodiment, the combination of the silicone rubber processed product 11 and the achromatic layer 12 can utilize regular multiple reflection, which is a characteristic of inorganic pigments. In addition to simple colors, metallic glossy expression with little change over time can be easily reproduced to obtain extremely excellent design, attractive design, fashion, profound feeling, and the like.

  Furthermore, since the elastic silicone rubber processed material 11 is used instead of the resin decorative body 10, the impact acting on the housing 4 when the mobile phone 1 or the like is dropped can be attenuated, absorbed, or alleviated to some extent. Thereby, damage prevention of the mobile phone 1 etc. can be expected.

  Next, FIGS. 8 to 14 show a second embodiment of the present invention. In this case, the achromatic layer 12 is bonded onto the molded sheet 16 and the achromatic layer 12 is adhered to the achromatic layer 12. The carrier layer 13 and the double-sided tape 14 are sequentially laminated and bonded (see FIG. 8), and the laminated body 17 of the sheet 16, the achromatic layer 12, the carrier layer 13, and the double-sided tape 14 is divided into a plurality of sheets (see FIG. 9). Then, a punching process for forming the decorative body 10 is performed on each laminated body 17 (see FIG. 9), and excess portions such as the sheet 16 are deburred from each laminated body 17 (see FIG. 10) to obtain a plurality of laminated pieces. 18 (see FIG. 11), and a plurality of decorative bodies 10 formed on each laminated piece 18 are transferred onto a jig 19 (see FIG. 12). Thereafter, the plurality of decorative bodies 10 are transferred onto the jig 19 To the release layer 15 via a plurality of positioning pins 20 (see FIG. 13) You have to stick changing as Te (see FIG. 14). The other parts are the same as those in the above embodiment, and the description thereof is omitted.

  In the present embodiment, the same effects as those of the above-described embodiment can be expected, and when the decorative body 10 is substantially flat and does not have an R shape, it can be easily manufactured in large quantities. Moreover, diversification of the manufacturing method of the decorative body 10 can be expected.

  The decorative body 10 according to the present invention is not limited to the above embodiment. For example, in the above embodiment, the required number of carrier layers 13, double-sided tapes 14 and release layers 15 are adhered to the back surface of the achromatic layer 12, but these carrier layers 13, double-sided tapes 14 and release layers 15 are May be omitted.

  Further, the carrier layer 13 may be subjected to a surface treatment technique such as corona treatment or frame treatment to improve the adhesion to the double-sided tape 14. Further, the double-sided tape 14 may be directly adhered to the achromatic layer 12 instead of the carrier layer 13 as long as there is no problem. Furthermore, the decorative body 10 can be used as a cushion rather than a screw concealment to prevent the occurrence of a collision sound when the housing 4 is folded.

Examples of the decorative body and its manufacturing method according to the present invention will be described below together with comparative examples.
Example 1
First, 2 parts by weight of a vulcanizing agent and 0.005 parts by weight of a colorant are added to 100 parts by weight of a silicone rubber having a hardness of 50 Hs, and 0.04 weight of an inorganic pigment in which a base flake is coated with a metal oxide is added thereto. A part of the sheet was rolled to form a temporary sheet, the sheet was cut into a predetermined size, and the sheet was vulcanized by hot pressing at 175 ° C. for 10 minutes.

  KE-551U (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) was used as the silicone rubber, and C-8 (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) was used as the vulcanizing agent. Further, KE-ColorMB (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) was used as a colorant, and a pigment obtained by coating a metal oxide of titanium dioxide using natural mica as a base flake was used as an inorganic pigment.

When the sheet is vulcanized by hot pressing, a complete sheet is formed by secondary vulcanization at 200 ° C. for 60 minutes, and an achromatic layer is adhered to the sheet with a silicone-based adhesive. A double-sided tape was laminated and adhered onto the achromatic layer, and then a laminate comprising these sheets, the achromatic layer and the double-sided tape was punched out with a punch of φ3.5 mm to produce a decorative body.
As the achromatic layer, a 0.1-t black PET film (trade name Lumirror X30 manufactured by Toray Industries, Inc.) was used. 512 (Nitto Denko product name) was used.

Example 2
100 parts by weight of silicone rubber KE-581U (trade name, manufactured by Shin-Etsu Chemical Co., Ltd.) having a hardness of 80Hs instead of a hardness of 50Hs was used, and the others were the same as in Example 1.
Example 3
A sheet was formed by blending in the same manner as in Example 1, but the inorganic pigment of Example 1 was changed from a pigment obtained by coating natural mica with titanium dioxide to a pigment obtained by coating flaky borosilicate glass with titanium dioxide. . Others were the same as in Example 1.

Example 4
A sheet was formed by blending in the same manner as in Example 1, but the inorganic pigment of Example 1 was changed from a pigment obtained by coating natural mica with titanium dioxide to a pigment obtained by coating synthetic silica silica flakes with titanium dioxide. did. Others were the same as in Example 1.

Comparative Example 1
A sheet was formed in the same manner as in Example 1, and a white PET film having a thickness of 0.1 mm (trade name E-20, manufactured by Toray) was adhered to the sheet instead of the achromatic layer. Double-sided tape was bonded on top, and these laminates were punched with a φ3.5 mm punch to produce a decorative body.

Comparative Example 2
A sheet was formed in the same manner as in Example 1, and a double-sided tape was directly bonded without adhering an achromatic layer on the sheet. Then, these laminates were punched with a φ3.5 mm punch to obtain a decorative body. Manufactured.

  When the decorative bodies of Examples and Comparative Examples were produced, the metallic design degree, chemical resistance, light resistance, drop impact absorbability, product cost, and dimensional absorbability related to these were examined and summarized in Table 1.

  As apparent from Table 1, according to the decorative body of the example, it was possible to obtain an excellent metallic design degree, chemical resistance, light resistance, drop impact absorption, product cost, and dimensional absorption. On the other hand, according to the decorative body of the comparative example, although excellent chemical resistance, light resistance, drop impact absorption, product cost, and dimensional absorption were obtained, the metallic design degree was low and high-class I couldn't create a sense of quality and a sense of advancedness, and I couldn't get attractive design, fashion and profound feeling.

It is a plane explanatory view showing typically an embodiment of a decoration object concerning the present invention. It is side explanatory drawing which shows typically embodiment of the decoration body which concerns on this invention. It is a back surface explanatory view showing typically an embodiment of a decoration object concerning the present invention. It is plane explanatory drawing which shows typically the relationship between the decoration body and release layer in embodiment of the decoration body which concerns on this invention. It is side surface explanatory drawing of FIG. It is a plane explanatory view showing typically the modification in the embodiment of the decoration object concerning the present invention. It is side surface explanatory drawing of FIG. The perspective view which shows typically the state which adhere | attaches an achromatic layer on the sheet | seat in other embodiment of the decoration body which concerns on this invention, and its manufacturing method, and adheres a carrier layer and a double-sided tape on this achromatic layer sequentially. It is explanatory drawing. The decorative body and the manufacturing method thereof according to the present invention are schematically shown in a state in which a laminate of a sheet, an achromatic layer, a carrier layer, and a double-sided tape is divided into a plurality of sheets, and each laminate is subjected to a punching process. FIG. It is a perspective explanatory view showing typically the state which removes a deburred part from the layered product in other embodiments of the decoration object concerning the present invention, and its manufacturing method. It is a perspective explanatory view showing typically the state where the layered product in other embodiments of the decoration object concerning the present invention and its manufacturing method is divided into a plurality of lamination pieces. It is a perspective explanatory view showing typically the state where a plurality of decorations of a lamination piece in other embodiments of the decoration object concerning the present invention and its manufacturing method are transcribe | transferred on a jig | tool. It is a perspective explanatory view showing typically the state where a plurality of decoration objects in other embodiments of the decoration object concerning the present invention and its manufacturing method are transcribed from a jig to a mold release layer. FIG. 14 is a perspective explanatory view schematically showing a state where a plurality of decorative bodies in FIG. 13 are pasted to a release layer. It is a perspective view which shows a mobile phone typically. FIG. 16 is a rear perspective view of FIG. 15. It is a perspective view which shows a game machine typically. It is a back perspective view showing a digital camera typically.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mobile phone 2 Game machine 3 Digital camera 4 Case 5 Screw hole 10 Decoration body 11 Silicone rubber processed material 12 Achromatic layer 13 Carrier layer 14 Double-sided tape (double-sided adhesive layer)
15 Release layer 16 Sheet 17 Laminated body 18 Laminated piece

Claims (4)

A decorative body provided in a housing of an electronic device, comprising a processed silicone rubber and an achromatic layer having a total light transmittance of less than 5% combined with the processed silicone rubber,
The processed silicone rubber product is a decorative body characterized in that 0.01 to 2 parts by weight of an inorganic pigment obtained by coating a base oxide with a metal oxide is added to silicone rubber.   The decorative body according to claim 1, further comprising a carrier layer bonded to the achromatic layer.   The decorative body according to claim 2, comprising a double-sided adhesive layer adhered to either the achromatic layer or the carrier layer.   4. The method for producing a decorative body according to claim 1, wherein 0.01 to 2 weight of an inorganic pigment in which a base oxide flake is coated with a metal oxide is added to a silicone rubber, a vulcanizing agent, and a colorant. Participants are added to prepare a compound, and the compound is vulcanized and molded to bond the achromatic layer, and then the molded product and the achromatic layer are processed into a predetermined shape. Body manufacturing method.

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