TWI393518B - Housing and method for making the same - Google Patents

Description

Housing and manufacturing method thereof

The invention relates to a casing and a manufacturing method thereof, in particular to a casing having a pattern or a trademark which is not easy to fall off and a manufacturing method thereof.

It is customary to apply a decorative paint layer to a plastic case of a portable electronic device such as a mobile phone, a digital camera, a personal digital assistant, a notebook computer, etc., and then print a pattern or letter on the paint layer as a trademark of the product. Since the printed pattern or letter is higher than the surface of the paint layer, the pattern or letter is easily worn or even peeled off during use, thereby affecting the appearance of the product.

In order to avoid this problem, a transparent ink is printed on the pattern or letter to prevent the pattern or letter from being worn. However, the transparent ink is also higher than the surface of the paint layer on the one hand, and does not have strong abrasion resistance. On the other hand, printing transparent ink causes halo on the edges of the lines forming the pattern or letters, and also affects the appearance of the printed pattern or letters.

In view of this, it is necessary to provide a housing in which a pattern formed on the housing is not easily worn or peeled off.

In addition, it is also necessary to provide a method of manufacturing the above casing.

A casing comprising a transparent substrate, a decorative layer formed on the transparent substrate, and a transparent protective layer formed on the decorative layer, the decorative layer being formed with a hollow pattern, the substrate being opposite to the decorative layer The surface is printed with ink.

A method of manufacturing the above casing, comprising the steps of: providing a transparent substrate; disposing a decorative layer on one surface of the transparent substrate; providing a transparent protective layer on the decorative layer; forming a hollow on the decorative layer a pattern; printing ink on the surface of the transparent substrate opposite the decorative layer.

The manufacturing method of the casing of the invention avoids the step of preparing a printing screen to print a pattern or a character on the surface of the casing; the pattern of the casing obtained by the method is located inside the casing and is not worn during use.

Referring to FIG. 1 , a housing 10 according to a preferred embodiment of the present invention includes a transparent substrate 11 , a decorative layer 13 formed on the transparent substrate 11 , and a transparent protective layer 15 formed on the decorative layer 13 .

The transparent substrate 11 is a plastic layer which can be formed by injection molding. The material forming the transparent substrate 11 may be selected from the group consisting of polyethylene (PE), polyamine (PA), polycarbonate (PC), acrylonitrile-styrene-butadiene copolymer (ABS), polymethacrylic acid. Any of methyl ester (PMMA) or polyethylene terephthalate (PET) plastic. A color ink 17 is disposed on the surface of the transparent substrate 11 not bonded to the decorative layer 13, and the color ink 17 can be printed on a portion of the surface of the transparent substrate 11. The color of the color ink 17 can be selected according to the needs of the product.

The decorative layer 13 is a color paint layer which can be bonded to the surface of the transparent substrate 11 with respect to the color ink 17 by spraying. Decorative layer 13 A pattern 131 is formed, which is formed by hollowing out a portion of the decorative layer 13, and the method of hollowing out may be laser etching. The pattern 131 is formed on the decorative layer 13 in a region corresponding to the color ink 17 of the substrate 11.

The protective layer 15 is a transparent paint layer which can be bonded to the surface of the decorative layer 13 by spraying. The protective layer 15 prevents the decorative layer 13 from being worn during use and maintains the vividness of the color of the decorative layer 13.

The method of fabricating the housing 10 of the preferred embodiment of the present invention includes the steps of providing a transparent substrate 11. The transparent substrate 11 can be a plastic layer which can be formed by injection molding. The material forming the transparent substrate 11 may be selected from the group consisting of polyethylene (PE), polyamine (PA), polycarbonate (PC), acrylonitrile-styrene-butadiene copolymer (ABS), polymethacrylic acid. Any of methyl ester (PMMA) or polyethylene terephthalate (PET) plastic.

A decorative layer 13 is provided on one surface of the transparent substrate 11. The decorative layer 13 can be a colored paint layer that can be bonded to the surface of the transparent substrate 11 by spraying. The color of the decorative layer 13 can be selected according to the color of the product.

A transparent protective layer 15 is disposed on the decorative layer 13. The protective layer 15 can be a transparent paint layer that can be bonded to the surface of the decorative layer 13 by spraying.

A pattern 131 is formed on the decorative layer 13. The pattern 131 is formed by hollowing out a portion of the decorative layer 13, and the method of hollowing out may be laser etching. Providing a laser source to cause the laser source to emit a laser beam to illuminate the surface of the protective layer 15 according to a predetermined pattern path, due to the protective layer 15 and the base The bodies 11 are all transparent layers, so that the laser beam is focused only on the decorative layer 13, and the pattern 131 is etched on the decorative layer 13.

The color ink 17 is printed on the surface of the transparent substrate 11 opposite to the decorative layer 13. The color ink 17 can be printed on the entire surface of the substrate 11, or can be printed on a portion of the surface corresponding to the pattern 131 of the decorative layer 13. The preferred embodiment is preferably the latter. The color of the color ink 17 is selected according to the color of the product pattern or trademark. After the color ink 17 is formed, the casing 10 can exhibit a color or a color pattern of the color ink 17 as seen from the outer surface of the protective layer 15.

The manufacturing method of the casing 10 of the present invention avoids the step of preparing a printing screen to print a pattern or a character on the surface of the casing; forming a hollow pattern 131 on the decorative layer 13 by laser etching, which is convenient and quick and can accurately control the pattern 131. The shape. The pattern 131 of the casing 10 obtained by the method is located inside the casing 10 and is not easily worn; and the pattern 131 is a hollow pattern, and the color of the pattern 131 is provided by the color ink 17 printed on the substrate 11, which can be visually given People have a sense of three-dimensionality, depth and beauty.

The housing 10 of the preferred embodiment of the present invention may be a housing of an electronic device such as a mobile phone, a game machine, a camera, or the like, or may be a cover or a container-like product such as a glasses case, a case, or the like.

10‧‧‧shell

11‧‧‧ base

13‧‧‧Decorative layer

15‧‧‧Protective layer

17‧‧‧Color ink

131‧‧‧ pattern

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view showing a housing of a preferred embodiment of the present invention.

10‧‧‧shell

11‧‧‧ base

13‧‧‧Decorative layer

15‧‧‧Protective layer

17‧‧‧Color ink

131‧‧‧ pattern

Claims (10)

A casing comprising a transparent substrate, a decorative layer formed on the transparent substrate, and a transparent protective layer formed on the decorative layer, wherein the decorative layer is formed with a hollow pattern, the substrate being opposite to the decorative layer An ink is printed on the surface, and the ink is presented through the hollow pattern. The casing of claim 1, wherein the transparent substrate is a plastic layer selected from the group consisting of polyethylene, polyamide, polycarbonate, acrylonitrile-styrene-butadiene copolymerization. Any of polymethyl methacrylate or polyethylene terephthalate. The casing of claim 1, wherein the decorative layer is a colored paint layer, and the protective layer is a transparent paint layer. The casing of claim 1, wherein the pattern of the decorative layer is formed by hollowing out a portion of the decorative layer, and the method of hollowing out is laser etching. The casing of claim 4, wherein the color ink is printed on a region of the substrate opposite the decorative layer with respect to the surface of the decorative layer. A manufacturing method of a casing, comprising the steps of: providing a transparent substrate; disposing a decorative layer on one surface of the transparent substrate; providing a transparent protective layer on the decorative layer; and forming a hollow pattern on the decorative layer Printing ink on the surface of the transparent substrate opposite to the decorative layer, the ink being presented through the hollow pattern. The method of manufacturing a casing according to claim 6, wherein The transparent substrate is a plastic layer selected from the group consisting of polyethylene, polyamide, polycarbonate, acrylonitrile-styrene-butadiene copolymer, polymethyl methacrylate or polyethylene terephthalate. Any of the esters. The method of manufacturing a casing according to claim 6, wherein the decorative layer is a color paint layer, and the protective layer is a transparent paint layer. The method for manufacturing a casing according to claim 6, wherein the pattern is formed by hollowing out a portion of the decorative layer, and the method of hollowing out is laser etching. The method of manufacturing a casing according to claim 9, wherein the region in which the color ink is printed on the surface of the substrate opposite to the decorative layer corresponds to a region on the decorative layer where the pattern is formed.