TWM574811U - Plastic back cover - Google Patents

Abstract

The present invention provides a plastic back cover, which is mainly formed by using a plastic injection molding machine to form a reflective surface layer for visual effects on the surface of the mold core, and then integrally formed by injection molding, and formed on one surface. A reflective surface layer having an optical refraction effect, comprising a reflective surface layer pattern having a plurality of finely-cut lines arranged in a plurality of regular or irregular shapes and which can be composed of various angles or arbitrary geometric patterns. Therefore, when the light is incident from the opposite side, the reflection and refraction effects are visually changed; the mass production can be achieved in production to save man-hours and costs, and is sufficient to produce a film different from the conventional film or thermal transfer. The technology presents a more beautiful visual effect.

Description

Plastic back cover

This creation is a plastic back cover widely used in electronic products, especially one that is integrally formed and can exhibit optical visual changes.

Common electronic products, such as various mobile devices, are widely used due to their high usage rate. Most users are pursuing novelty, fashion and individual styles. They do not make various beautification measures for the outer casing of the mobile device, such as painting, printing and attaching. Various patterns are presented on the outer casing (a rhinestone, a sticker, a protective film), a laser engraving, and the like.

Young people love the sleek style of the mobile phone, and the shape is to be cool, the pattern should be novel, and the mobile phone manufacturers do not take this as the starting point, research and design and design on the shell of the mobile phone, The bright style of the body is mostly designed with a bright and novel (popular) graphic. The common practice is to print the transfer pattern with the pattern pattern, and heat transfer transfer to the surface of the plastic substrate to form the printing. The layer is coated on the surface of the printing layer with a protective transparent film; or the plastic pattern of the plastic plate body is printed on the plastic plate body and integrally formed.

Although these methods can form a pattern on the outer casing surface of the electronic product, they are simply printed layers on the outer casing surface, and cannot provide a variety of changes and special dazzling effects, and it is difficult to create a novel and unique vision. effect. Furthermore, the If the outer casing is designed to produce a three-dimensional visual effect by designing the printed layer with concave and convex lines, the stereoscopic effect that can be produced by this method is rather limited, and the outer casing surface may be uneven and the original texture may be damaged. Furthermore, although a plastic plate body capable of exhibiting three-dimensional grain color light is disclosed at present, these are methods in which a laser reflective printing layer is provided on the surface of the plastic plate body, and the pattern effect produced by the film is not sufficiently obvious.

The creators of this case feel that the pattern formed by the above-mentioned practices is not obvious, and the practice and process are too cumbersome. They are devoted to research and use their own experience to propose a plastic back cover, which is to be presented by a plastic injection molding machine. The reflective surface layer of the effect is designed to be molded on the surface of the mold core, so that the desired geometric image is visualized on the plastic back cover which is integrally formed by injection molding.

The main purpose of this creation is to provide a plastic back cover, which has a reflective surface layer by a plastic back cover, and exhibits a visual change effect through reflection and refraction when light is incident from the opposite side.

Another object of the present invention is to provide a plastic back cover which can be mass-produced in production to save man-hours and costs, and is sufficient to produce a more beautiful visual effect different from conventional film or thermal transfer technology.

A further object of the present invention is to provide a plastic back cover, which can be integrally formed into a reflective surface layer, whether it is a flat or non-planar (such as a curved surface or a curved surface), and achieves a unique optical refractive visual effect. .

In order to achieve the above objectives, the present author has devised a plastic back cover which is integrally formed by injection molding, and has a reflective surface layer having an optical refractive effect on one surface, including most regular or irregular Can be composed of various angles or arbitrary geometric figures The reflection surface layer type of most of the extremely fine cutting lines.

Most of the ultra-fine cutting lines of the reflective surface layer are pre-molded on the surface of the mold core of the mold.

The cross section of the reflective surface layer may be any of a triangular tooth shape, a semi-arc shape or another geometric shape.

The angle of the triangular teeth is between 90 and 160 degrees.

The thickness of the reflective surface layer is 5 to 25 μ, and 15 μ is the best.

The reflective surface layer of the plastic back cover may be any one of a plane or a curved surface.

The plastic back cover described above can be used on electronic products such as the housing of a mobile device.

Any color layer may be disposed on the reflective surface layer.

A background layer may be disposed on the reflective surface layer.

In order to enable your review board to further understand the techniques, means and effects of this creation in order to achieve the intended purpose, please refer to the following detailed description and drawings of this creation, and believe that the purpose, characteristics and characteristics of this creation can be An in-depth and specific understanding is provided, however, the drawings are provided for reference and description only and are not intended to limit the invention.

(1) ‧‧‧ plastic back cover

(2) ‧ ‧ reflective surface

(3)‧‧‧Men

(31)‧‧‧cut face

(4) ‧ ‧ color layer

(5) ‧ ‧ background layer

The first figure is a schematic view of the structure of a plastic back cover according to a preferred embodiment of the present invention.

The second figure is a schematic view of a mold die used in the plastic back cover of a preferred embodiment of the present invention.

The third figure is a schematic cross-sectional view of a mold core of a preferred embodiment of the present invention.

The fourth figure is a schematic diagram of different implementation structures of the plastic back cover of a preferred embodiment of the present invention.

First, please refer to the first and second figures. The plastic back cover (1) is a flat or curved shell made of plastic through an injection molding machine. A reflective surface layer (2) is disposed on one surface (preferably the inner surface) of the casing, and includes a reflective surface layer type which has a plurality of regular or irregular shapes and can be arranged by various angles or arbitrary geometric patterns. state.

The plastic back cover (1) may be made of a transparent, translucent or non-transparent plastic material.

Regarding the production of the plastic back cover (1), please refer to the second figure, mainly using the injection molding machine, and pre-processing the diamond knives on the mold core (3) of the mold. The surface of the mold core (3) is formed with a cutting surface (31) composed of 2D, 3D or various geometric angles, and the cutting surface (31) actually comprises a plurality of extremely fine cutting lines.

Please refer to the third figure, the cross section of the cutting surface can be implemented in any one of continuous triangular tooth shape, semi-arc shape or other geometric shape; and the thickness (H) of the cutting line is between In the range of 5~25μ, 15μ is the best; if the cross section of the cutting line is continuous triangular tooth shape, the angle (A) may vary from 90 to 160 degrees depending on the thickness (H). The cross-sectional angle of the cutting line is mainly for different refractive effects formed by different light entering angles, so that the user can produce a visual change effect with a stereoscopic image by different visual viewing angles.

In the actual application, the mold and the mold core (3) which have been processed in advance by the required cutting surface (31) are installed on the injection molding machine, and when started, a complete plastic back cover is output through the injection manufacturing process ( 1), and a surface (ie, the inner surface) of the plastic back cover (1) is formed with a reflective surface layer (2), which is correspondingly disposed on the surface of the mold core (3) Cutting surface (31). At this time, the plastic back cover (1) is assembled with the electronic product, and the electronic product has the unique style and charm of obvious visual effects.

Referring to the fourth figure, the reflective surface layer (2) formed on one surface of the plastic back cover (1) of the present invention is composed of a high-density and extremely fine cutting line, and thus the reflective surface layer ( 2) Relatively another aspect, the reflective surface layer (2) can be produced by a user's viewing angle to produce a more beautiful visual effect different from the conventional film or thermal transfer technology. Of course, the reflective surface layer (2) can further exhibit more diverse color variations, including: setting a color layer (4) of a material of any color in the cutting line, or forming a single or gradient color. The background layer (5) can also be provided with a color layer (4) and a background layer (5); accordingly, it is freely selected to achieve a more diverse and individual-specific optical refraction and visual change effect.

The reflective surface layer (2) described above can be disposed on any type of plastic surface, including planar or non-planar.

In summary, the characteristics and advantages of this creation include: (1) At the same time as the plastic back cover is formed, a pre-designed reflective layer with optical refraction effect is formed, which can achieve significant optics when viewed from the opposite side. The visual effect of refraction. (2) In the process, only mass production can be achieved by injection molding to save man-hours and costs; in particular, the reflective surface layer is directly formed, and the durability and refinement are far superior to those of conventional film and thermal transfer products. Longer life and more fresh and beautiful. (3) Since the reflective surface layer is integrally formed, it can still have a perfect visual effect of optical refraction, whether it is a plane or a non-planar (such as a curved surface or a curved surface).

The plastic back cover of this creation can indeed provide a structural design that is quite different from the conventional ones by the above-mentioned technical contents, which can improve the overall use value and before the application. Not found in the publication or public use, Cheng has already met the requirements of the new patent.

However, the drawings and descriptions disclosed above are only examples of the present invention, and those skilled in the art can make other improvements according to the above description, and these changes still belong to the inventive spirit of the present invention. The scope of the patents defined below.

Claims (9)

A plastic back cover is integrally formed by injection molding of an injection molding machine, and has a reflective surface layer having an optical refraction effect on a surface, including a plurality of fine layers which are mostly regular or irregular and can be composed of various angles or arbitrary geometric figures. The shape of the reflective surface of the cutting line arrangement, whereby when the reflective surface layer is incident by the light of the other opposite surface, the visual change effect is exhibited by any refraction and reflection. The plastic back cover of claim 1, wherein the plurality of extremely thin cutting lines of the reflective surface layer are pre-formed on the surface of the mold core of the mold. The plastic back cover of claim 1, wherein the reflective surface layer has a cross section of any of a triangular tooth shape, a semi-arc shape or another geometric shape. The plastic back cover of claim 3, wherein the angle of the triangular teeth is between 90 and 160 degrees. The plastic back cover according to claim 1, wherein the thickness of the reflective surface layer is in the range of 5 to 25 μ, and further preferably 15 μ. The plastic back cover of claim 1, wherein the reflective surface layer of the plastic back cover can be any one of a plane or a curved surface. The plastic back cover of claim 1, wherein the plastic back cover is for use on an electronic product, such as a housing of a mobile device. The plastic back cover of claim 1, wherein any color layer is disposed on the reflective surface layer. The plastic back cover of claim 1, wherein a background layer is disposed on the reflective surface layer.