JP2012054355A - Coating structure of electronic apparatus and coating method of electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a coating structure of an electronic apparatus which has excellent durability and can maintain appearance quality over the long term, and to provide a coating method of an electronic apparatus.SOLUTION: In the coating structure of an electronic apparatus, e.g. a cellular phone having a coating layer formed on the surface of a case, the coating layer includes a first coating layer formed on the surface of the case and consisting of a silicon material, and a second coating layer formed on the surface of the first coating layer and consisting of an urethane based UV-curing resin material.

Description

  The present invention relates to a coating structure and a coating method for various electronic devices including a mobile phone.

In various electronic devices such as mobile phones, a coating layer is formed on the surface of a housing made of resin or metal.
For example, in Patent Document 1, a hard coat layer is formed on the surface of a housing using a UV (ultraviolet) curable resin or an acrylic urethane resin.
Moreover, in patent document 2, the decoration layer is formed with the resin film on the surface of the resin molded product.
Such a coating layer has a function of improving the appearance of the housing by coloring, a function as a protective layer for preventing the housing from being damaged, and the like. This coating layer is also used to ensure durability against use under high temperature environments and resistance to various chemical substances such as secretions from the human body, hand creams, cosmetics, sunscreens, hairdressing agents, etc. .

JP 2005-296841 A JP 2007-221610 A

However, when the device is dropped or another article collides with the device, the coating layer breaks due to external impact, or the coating layer is gradually damaged by friction with hard and sharp objects such as sand and straps. There is a problem that peels off from the housing.
Accordingly, an object of the present invention is to provide a coating structure for an electronic device and a coating method for the electronic device that are excellent in durability and can maintain the appearance quality for a long time.

The present invention employs the following means in order to solve the above problems.
That is, the coating structure of an electronic device according to the present invention is an electronic device coating structure in which a coating layer is formed on the surface of a casing constituting the electronic device, and the coating layer is formed on the surface of the casing. And a first coating layer made of a silicon material, and a second coating layer formed on the surface of the first coating layer and made of a urethane-based ultraviolet curable resin material.

  The method for coating an electronic device according to the present invention includes a step of forming a first coating layer made of a silicon material on a surface of a housing constituting the electronic device, and a urethane on the surface of the first coating layer. Forming a second coating layer made of a system ultraviolet curable resin material.

  According to the present invention, when an impact or the like is applied from the outside by the first coating layer having elasticity, the impact can be absorbed, and the second coating layer is scratched or cracked. To prevent. Also, since the second coating layer itself has flexibility, even if the first coating layer is deformed at the time of absorbing the impact, the second coating layer is deformed following the deformation and the second coating layer is prevented from cracking. To do. In this way, it is possible to prevent the appearance and function of various electronic devices from deteriorating and realize high durability.

It is a figure for demonstrating the structure of the mobile telephone terminal in this Embodiment, and is a perspective view of the state which opened the display housing | casing and the main body housing | casing. FIG. 2 is a perspective view showing a state in which a display housing and a main body housing of the mobile phone terminal shown in FIG. 1 are closed. It is a figure which shows an example of the housing | casing division body which comprises a display housing | casing, (a) is the perspective view, (b) is AA sectional drawing of (a). It is sectional drawing to which a part of FIG.3 (b) was expanded. It is sectional drawing which shows the structure which forms a through-hole in a division body and forms waterproof packing simultaneously with a base layer.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. However, the present invention is not limited only to these examples.
As shown in FIG. 1, the mobile phone terminal (electronic device) 10 includes a display housing 20 including a display unit 21 such as an LCD, and a main body housing 30 including a key input unit 31.
As shown in FIGS. 1 and 2, the display housing 20 and the main body housing 30 are rotatably connected by a hinge 11 on each side 20 a and 30 a. Here, the display housing 20 and the main body housing 30 are not limited to the configuration in which the display housing 20 and the main body housing 30 are rotatably connected by the hinge 11, and the display housing 20 and the main body housing 30 may be slidably connected. Good.
In addition, the mobile phone terminal 10 does not necessarily include the display housing 20 and the main body housing 30, and is a so-called tablet type or straight type in which the display housing 20 and the main body housing 30 are integrally configured. There may be.

  Here, the display housing 20 and the main body housing 30 are each configured by fitting at least two housing divided bodies 22A, 22B, 32A, 32B, and 32C to each other.

Each of the housing divided bodies 22A, 22B, 32A, 32B, and 32C has a predetermined shape.
FIG. 3 is a diagram illustrating the housing division body 22B as an example among the housing division bodies 22A, 22B, 32A, 32B, and 32C.
FIG. 4 is a diagram showing a coating structure K of the mobile phone terminal 10 according to the embodiment of the present invention. The configuration of the coating layer 50 is the same for the case division bodies 22A, 32A, 32B, and 32C other than the case division body 22B.
As shown in FIG. 4, the housing divided body 22 </ b> B has a configuration in which the surface of the base material 40 made of a resin material or a metal material is covered with a coating layer 50.

  The coating layer 50 has a base layer (first coating layer) 51 formed so as to cover the surface of the substrate 40 and a surface coating layer (second coating layer) 52 that forms the outermost surface layer. ing. Further, in order to improve the adhesion between the base layer 51 and the surface coating layer 52, it is preferable to provide a primer layer 53.

The base layer 51 is preferably formed of an elastic material, for example, a silicon material.
Here, it is preferable that liquid silicon is used as the silicon material for forming the base layer 51, and the base layer 51 is integrally formed by a so-called two-color molding method at the time of resin molding of the substrate 40. The two-color molding method is a molding method for producing an integrated product by molding two colors or two types of resins in two steps. In this case, by adjusting the surface of the mold forming the base layer 51, for example, the surface finish of the base layer 51 can be increased, for example, the mirror surface degree can be increased, or various texture finishes such as a texture pattern and unevenness can be easily added. it can.
Further, as shown in FIG. 5, through holes 41 penetrating the front and back sides are formed on the back side of the base layer 51 in the base material 40, and after forming the base material 40 by the two-color molding method, When the base layer 51 is formed, the silicon material forming the base layer 51 is also filled into the inner surface of the base material 40 (the inside of the display housing 20 and the main body housing 30) through the through holes 41. The waterproof packing 60 can also be formed at the same time inside. In this case, as a matter of course, it is necessary to form a cavity (cavity) in a portion where the waterproof packing 60 is formed in the mold.

  The surface coating layer 52 is preferably made of urethane-based UV (ultraviolet) curable resin and having flexibility.

  The primer layer 53 usually adheres the silicon material of the base layer 51 that does not adhere to the urethane UV curable resin of the surface coating layer 52.

Such casing division bodies 22A, 22B, 32A, 32B, and 32C can be formed by sequentially forming the base layer 51, the primer layer 53, and the surface coating layer 52 on the surface of the base material 40.
Here, in the case of using the two-color molding method as described above, the base layer 51 is formed by injecting a resin material or a metal material into the cavity in the mold to form the base material 40, and then the other layers in the mold. The cavity is formed by injecting silicon material.
The primer layer 53 and the surface coating layer 52 are formed by sequentially spraying a material for forming the primer layer 53 and a urethane UV curable resin for forming the surface coating layer 52 on the surface of the base layer 51 in this order. It forms by apply | coating by various application | coating methods, such as.

According to such a cellular phone terminal 10, the coating layer 50 covering the surfaces of the base material 40 of the display housing 20 and the main body housing 30 includes the base layer 51 made of an elastic silicon material and the base layer 51. And a surface coating layer 52 made of a urethane-based resin material having flexibility and provided so as to cover.
Thereby, when an impact or the like is applied from the outside, the impact can be absorbed by the base layer 51 having elasticity, and the surface coating layer 52 is prevented from being scratched or cracked. Further, since the surface coating layer 52 also has flexibility, even if the base layer 51 is deformed at the time of absorbing the shock, the surface coating layer 52 is deformed following the deformation and the surface coating layer 52 is prevented from cracking.
Further, when the base layer 51 is formed of a silicon material, the silicon material easily swells due to contaminants such as moisture and chemicals. However, by covering the base layer 51 with the surface coating layer 52, contaminants on the base layer 51 Reaching can be prevented, and swelling of the base layer 51 can be prevented.
In this way, it is possible to prevent the appearances of the display housing 20 and the main body housing 30 from deteriorating and realize high durability.

In addition, when liquid silicon is used for the base layer 51 and the base material 40 is formed by the two-color molding method, the mirror surface degree and finish of the surface can be easily added by a mold. The degree of freedom increases.
Further, by forming the through hole 41 in the base material 40 when forming the base layer 51, the silicon material forming the base layer 51 faces the inside of the display housing 20 and the main body housing 30 in the base material 40. At the same time, the waterproof packing 60 can be formed on the surface to be manufactured, whereby the production can be performed efficiently.

  Furthermore, by providing the primer layer 53 between the base layer 51 and the surface coating layer 52, the base layer 51 and the surface coating layer 52 can be firmly bonded. It can be prevented from peeling off.

The electronic device coating structure and the electronic device coating method of the present invention are not limited to the above-described embodiments described with reference to the drawings, and various modifications may be considered within the technical scope thereof. It is done.
For example, the same coating layer 50 may be provided not only on the display housing 20 and the main body housing 30 but also on other parts such as the key input unit 31.
Moreover, when the base material 40 is metal, it is preferable to further form a primer layer between the base layer 51 and the base material 40, and to improve these adhesiveness.
Moreover, not only the mobile phone terminal 10, but also various electronic devices having communication functions such as PHS (Personal Handy-phone System), transceiver, PDA (Personal Digital Assistant), notebook personal computer, portable music player, etc. are portable. The configuration described in the above embodiment can be similarly applied to the casings and covers of various devices.
In addition to this, as long as the gist of the present invention is not deviated, the configurations described in the above embodiments can be selected or other configurations can be changed as appropriate.

10 Mobile phone terminals (electronic devices)
20 display housing 21 display 22A, 22B, 32A, 32B, 32C housing divided body 30 main body housing 40 base material 41 through hole 50 coating layer 51 base layer (first coating layer)
52 Surface coating layer (second coating layer)
53 Primer layer 60 Waterproof packing K Coating structure

Claims (6)

In the coating structure of an electronic device in which a coating layer is formed on the surface of a casing constituting the electronic device,
The coating layer is
A first coating layer formed on a surface of the housing and made of a silicon material;
A second coating layer formed on the surface of the first coating layer and made of a urethane-based ultraviolet curable resin material;
A coating structure for an electronic device, comprising:   The primer layer according to claim 1, further comprising a primer layer that adheres the first coating layer and the second coating layer between the first coating layer and the second coating layer. Electronic device coating structure. Forming a first coating layer made of a silicon material on a surface of a housing constituting the electronic device;
Forming a second coating layer made of a urethane-based ultraviolet curable resin material on the surface of the first coating layer, and a method for coating an electronic device. Further comprising a step of forming a primer layer on the surface of the first coating layer,
The method for coating an electronic device according to claim 3, wherein the second coating layer is formed on a surface of the primer layer.   5. The method of coating an electronic device according to claim 3, wherein the first coating layer is formed by a two-color molding method when the casing is molded.   A through-hole is formed in advance through the housing, and a seal portion made of a silicon material is formed on the back surface of the housing through the through-hole when forming the first coating layer by a two-color molding method. The coating method of the electronic device of Claim 5 characterized by these.

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