CN110868819A

CN110868819A - Preparation method of casing, casing and electronic device

Info

Publication number: CN110868819A
Application number: CN201810989097.1A
Authority: CN
Inventors: 严文龙; 江韬; 闪荷
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2018-08-28
Filing date: 2018-08-28
Publication date: 2020-03-06

Abstract

The present disclosure relates to a preparation method of a casing, a casing and an electronic device. The preparation method includes: respectively preparing a substrate body and a diaphragm body, wherein the diaphragm body includes a diaphragm; laminating the diaphragm body and the substrate body to obtain the casing; wherein, preparing the substrate body The method includes: preparing a first substrate; preparing a first optical coating layer on one side of the first substrate; preparing the diaphragm body includes: forming a UV texture layer on the surface of the diaphragm; A second optical coating layer is prepared on the surface; a first undercoat ink layer is formed on the second optical coating layer.

Description

Preparation method of shell, shell and electronic equipment

Technical Field

The disclosure relates to the technical field of terminals, and in particular to a shell, a preparation method of the shell and electronic equipment.

Background

At present, along with the gradual improvement of user to electronic equipment outward appearance aesthetic property requirement, each big manufacturer designs and improves electronic equipment's backplate casing gradually, makes it to show different outward appearance effects. For example, in the related art, the back panel housing may be made of glass material, so as to improve the aesthetic property and the holding feeling of the user.

Disclosure of Invention

The present disclosure provides a method for manufacturing a housing, and an electronic device to solve the disadvantages of the related art.

According to a first aspect of embodiments of the present disclosure, there is provided a method of manufacturing a case, including:

respectively preparing a substrate body and a membrane body, wherein the membrane body comprises a membrane;

attaching the membrane body and the substrate body to obtain the shell;

wherein preparing the substrate body comprises:

preparing a first substrate;

preparing a first optical coating layer on one side of the first substrate;

preparing the membrane body comprises:

forming a UV texture layer on the surface of the membrane;

preparing a second optical coating layer on the surface of the UV texture layer;

and forming a first bottom covering ink layer on the second optical coating layer.

Optionally, preparing the membrane body further comprises:

and preparing and forming a third optical coating layer on the surface of the diaphragm, wherein the diaphragm is positioned between the third optical coating layer and the UV texture layer.

Optionally, preparing the substrate body further comprises:

and forming a fourth optical coating layer on the surface of the first substrate, wherein the first substrate is positioned between the fourth optical coating layer and the first optical coating layer.

Optionally, the preparing and forming a first bottom-covering ink layer on the second optical coating layer includes:

preparing a first preset color layer on the surface of the second optical coating layer;

and preparing the first bottom covering ink layer on the surface of the first preset color layer.

Optionally, preparing the substrate body further comprises:

and preparing an anti-fingerprint film layer on one side of the first substrate, which is opposite to the first optical coating layer.

Optionally, preparing the substrate body further comprises:

before the first optical coating layer is prepared, hardening the substrate body.

Optionally, preparing the membrane body further comprises:

keep away from on the diaphragm one side on the UV texture layer forms the OCA glue film, the OCA glue film is used for the laminating the diaphragm body with the substrate body.

According to a second aspect of embodiments of the present disclosure, there is provided a housing comprising: a membrane body and a substrate body bonded to each other;

wherein the substrate body comprises:

the optical coating device comprises a first substrate and a first optical coating layer prepared on the surface of the first substrate;

the membrane body includes:

a membrane;

a UV texture layer prepared on the surface of the membrane;

and preparing a first bottom covering ink layer on the second optical coating layer.

Optionally, the membrane body further comprises a third optical coating layer formed on the surface of the membrane, and the membrane is located between the third optical coating layer and the UV texture layer.

Optionally, the substrate body further includes a fourth optical film layer formed on the surface of the first substrate, and the first substrate is located between the first optical film layer and the fourth optical film layer.

Optionally, the membrane body further includes a first preset color layer, and the first preset color layer is located between the second optical coating layer and the first bottom-covering ink layer.

Optionally, the substrate body further includes an anti-fingerprint film layer, and the first substrate is located between the anti-fingerprint film layer and the first optical coating layer.

Optionally, the casing further includes an OCA glue layer, and the OCA glue layer is located between the diaphragm body and the first optical coating layer.

Optionally, the diaphragm comprises a PC diaphragm or a PET diaphragm.

Optionally, the first substrate includes a plastic first substrate, a glass first substrate, or a glass fiber composite first substrate.

According to a third aspect of the embodiments of the present disclosure, there is provided a method of manufacturing a case, including:

preparing a second substrate;

forming a fifth optical coating layer on the front surface of the second substrate;

forming a sixth optical coating layer on the back of the second substrate;

and preparing and forming a second bottom covering ink layer on the sixth optical coating layer to obtain the shell.

Optionally, the preparing and forming a second bottom-covering ink layer on the sixth optical coating layer includes:

preparing and forming a second preset color layer on the surface of the sixth optical coating layer;

and preparing and forming the second bottom covering ink layer on the surface of the second preset color layer.

According to a fourth aspect of embodiments of the present disclosure, there is provided a housing including:

a second substrate;

preparing a fifth optical coating layer on the front surface of the second substrate;

preparing a sixth optical coating layer on the back of the second substrate;

and the second bottom covering ink layer is prepared on the sixth optical coating layer.

Optionally, the optical coating device further comprises a second preset color layer prepared on the sixth optical coating layer;

the second bottom-covering ink layer is located on the surface of the second preset color layer, and the second preset color layer is located between the second bottom-covering ink layer and the sixth optical coating layer.

According to a fifth aspect of the embodiments of the present disclosure, there is provided an electronic device including a housing obtained by the manufacturing method according to any one of the embodiments; or,

a housing as claimed in any preceding embodiment.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

according to the embodiment, the optical coating layer on the substrate body is matched with the optical coating layer on the membrane body, so that the appearance texture of the shell is improved, the shell is transparent and smooth, the visual feeling of a user is improved visually, and the attractiveness of a product is enhanced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a flow chart illustrating a method of manufacturing a housing according to an exemplary embodiment.

Fig. 2 and 3 are a detailed flow chart of the steps shown in fig. 1.

FIG. 4 is a flow chart illustrating another method of making a housing according to an exemplary embodiment.

Fig. 5-8 illustrate a cross-sectional schematic view of a housing according to an exemplary embodiment.

FIG. 9 is a flow chart illustrating yet another method of housing preparation according to an exemplary embodiment.

FIG. 10 illustrates a cross-sectional schematic view of another housing in accordance with an exemplary embodiment.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

FIG. 1 is a flow chart illustrating a method of making a housing according to an exemplary embodiment. As shown in fig. 1, the flow chart of the preparation method may include:

in step 101, a substrate body and a membrane body are prepared, the membrane body including a membrane.

In step 102, the membrane body is bonded to the substrate body to obtain a housing.

In this embodiment, the substrate body and the membrane body may be prepared simultaneously by different devices, and then the membrane body and the substrate body are attached to obtain the housing after the preparation is completed. In other embodiments, the film body and the substrate body may be prepared sequentially and then attached to form the housing, which is not limited by the disclosure.

The substrate body can comprise a first optical coating layer, and after the substrate body and the membrane body are respectively prepared and molded, the membrane body and the first optical coating layer of the substrate body can be attached through OCA (Optically Clear Adhesive).

As shown in fig. 2, the step for preparing the substrate body in step 101 may further include:

in step 201, a first substrate is prepared.

In this embodiment, the first substrate may include a plastic first substrate, a glass first substrate, or a glass fiber composite first substrate, which is not limited by the present disclosure. The plastic first substrate can be made of transparent plastic material. For example, the transparent plastic material may include PC (Polycarbonate), PMMA (polymethyl methacrylate), or a mixture of PC and PMMA.

Taking the first glass substrate as an example, preparing the first substrate may include polishing a blank to ensure that the roughness of the surface of the first substrate is within a required range, performing numerical control processing on the blank to form structures such as hole sites on the first substrate, and forming a radian around the first glass substrate, for example, forming a 2.5D or 3D radian to make the periphery of a subsequent finished shell arc-shaped, thereby enhancing the aesthetic property of the shell. The present disclosure is not limited by the specific order in which the blank is subjected to the grinding process, the numerical control machining process, and the radian molding process.

In step 202, a first optical coating is formed on one side of the first substrate.

In this embodiment, a first optical coating layer may be prepared on one side of the first substrate, and the first optical coating layer may include an optical coating layer formed by one optical coating process, or may also include optical coating layers formed by multiple optical coating processes and stacked, so that the first optical coating layer has appropriate transmittance and reflectance, and achieves a desired appearance effect.

And the first substrate is positioned between the first optical coating layer and the fourth optical coating layer, so that the appearance effect of the shell is ensured through the cooperation of the first optical coating layer and the fourth optical coating layer. Wherein, the first optical coating layer can be formed on the back surface of the first substrate, and the back surface can be understood as: after the prepared housing is assembled, the back surface of the first substrate faces the inside of the electronic device. Accordingly, a fourth optical coating may be formed on the front side of the first substrate, which may be understood as: after the prepared housing is assembled, the back surface of the first substrate faces the outside of the electronic device. It should be noted that: the forming position of the optical coating layer can be determined as the first optical coating layer or the fourth optical coating layer. For example, the optical coating layer formed on the back surface of the first substrate may be determined as a first optical coating layer, and the optical coating layer formed on the front surface of the first substrate may be determined as a fourth optical coating layer.

Furthermore, an anti-fingerprint film layer can be prepared on the side, opposite to the first optical coating layer, of the first substrate, so that fingerprints printed on the shell are reduced as much as possible when a user holds the electronic equipment. For example, the anti-fingerprint film layer can be directly formed on the front surface of the first substrate; alternatively, when the front surface of the first substrate is formed with the fourth optical coating layer, the anti-fingerprint film layer may be formed on the surface of the fourth optical coating layer.

In the above embodiments, in order to enhance the hardness of the first substrate and avoid scratching the first substrate in a subsequent process, the first substrate may be hardened before the process of forming the optical coating layer on the first substrate, and the hardening may be performed on one side surface of the first substrate or may be performed on both side surfaces of the first substrate, which is not limited by the disclosure.

As shown in fig. 3, the step of preparing the membrane body for the step 101 may further include:

in step 301, a UV textured layer is prepared on the membrane sheet.

In this embodiment, the membrane may include a PC membrane (PC, Polycarbonate) or a PET membrane (PET), but is not limited thereto. Wherein, a UV texture layer can be formed on the surface of the membrane by a UV transfer printing technology.

In step 302, a second optical coating layer is formed on the surface of the UV textured layer.

In this embodiment, a second optical coating layer may be prepared on the surface of the UV texture layer through an optical coating process, where the second optical coating layer may be a film layer formed through one optical coating process or may be a film layer formed through multiple optical coating processes.

Furthermore, a third optical coating layer can be prepared on the surface of the membrane, and the membrane is positioned between the third optical coating layer and the UV texture layer, so that the transparent and mellow effects of the shell are further enhanced. And an OCA adhesive layer can be formed on one side of the diaphragm, which is far away from the second optical coating layer. When the diaphragm body comprises a third optical coating layer, the OCA glue layer can be formed on the surface of the third optical coating layer; when the membrane body does not comprise the third optical coating layer, the OCA glue layer can be formed on the surface of the membrane.

It should be noted that: when the substrate body comprises the first optical coating and the membrane body comprises the third optical coating, the membrane body and the substrate are attached, namely: the third optical coating layer of the diaphragm body is attached to the first optical coating layer on the back of the first substrate on the substrate body through OCA glue. When the substrate body comprises a first optical coating layer positioned on the back surface of the first substrate and the membrane body does not comprise a third optical coating layer, the membrane body and the substrate are attached, namely: the diaphragm of the diaphragm body is attached to the first optical coating layer through the OCA glue.

In step 303, a first primer ink layer is formed on the second optical coating layer.

In this embodiment, a first preset color layer may be further formed on the surface of the second optical coating layer, and then the first bottom-covering ink layer is prepared on the surface of the first preset color layer. Thereby make can make fashioned casing reach the effect of dazzling various, different according to the colour on first predetermined colour layer, can obtain the casing of different outward appearances moreover. For example, this first preset colour layer can include red, yellow, silver or white etc. this disclosure does not restrict this, and because first preset colour layer probably can't block outside light, so can form first bottom of the lid printing ink layer on the surface on first preset colour layer, avoid the user to see through the casing and observe inside the electronic equipment that the collocation was equipped with this casing.

To explain the technical solution of the present disclosure in detail, the following takes an example that the substrate body includes a first optical coating layer and a fourth optical coating layer, and the membrane body includes a second optical coating layer and a third optical coating layer, and the details are explained with reference to fig. 4.

In step 401, a first substrate is prepared.

In step 402, a first optical coating is formed on the back side of the first substrate.

In step 403, a fourth optical coating is formed on the front side of the first substrate.

In step 404, a third optical coating is formed on the front side of the diaphragm.

In step 405, an OCA glue layer is formed on the surface of the third optical coating layer.

In step 406, a UV textured layer is formed on the back side of the membrane.

In step 407, a second optical coating layer is formed on the surface of the UV textured layer.

In step 408, a first predetermined color layer is formed on the surface of the second optical coating layer.

In step 409, a first ink capping layer is formed on the surface of the first predetermined color layer.

In this embodiment, the front side of the membrane can be understood as: the surface of the diaphragm facing the outside of the electronic device is a front surface when the formed case containing the diaphragm is mounted to the electronic device; similarly, the back of the membrane can be understood as: when the formed case containing the diaphragm is assembled to an electronic device, the surface of the diaphragm facing the inside of the electronic device is a front surface.

In step 410, the OCA glue layer is attached to the first optical coating layer.

In step 411, an anti-fingerprint film layer is formed on the surface of the fourth optical coating layer.

In this embodiment, the anti-fingerprint film layer may be formed on the surface of the fourth optical coating layer by a spraying or brushing process, which is not limited by this disclosure.

It should be noted that: the sequence of steps in the above embodiments is merely exemplary, and in fact, the film sheet may be processed first and then the first substrate, or the film sheet may be processed simultaneously. Moreover, any of the steps may be interchanged without the order limitation, for example, step 411 may also be completed when the first substrate is processed, which is not limited by the present disclosure.

With respect to the manufacturing process shown in fig. 4, it is possible to obtain a case 100 if shown in fig. 5, the case 100 may include a substrate body 101 and a membrane body 102. The substrate body 101 may include a first substrate 1, a fourth optical coating layer 2 on the front surface of the first substrate 1, a first optical coating layer 3 on the back surface of the first substrate 1, and an anti-fingerprint film layer 4 on the surface of the fourth optical coating layer 2. The membrane body 102 may include a membrane 5, a third optical coating layer 6 located on the front side of the membrane 5, an OCA glue layer 7 located on the surface of the third optical coating layer 6, a UV texture layer 8 located on the back side of the membrane 5, a second optical coating layer 9 located on the surface of the UV texture layer 8, a first preset color layer 10 located on the surface of the second optical coating layer 9, and a first bottom-covering ink layer 11 located on the surface of the first preset color layer 10.

Of course, in an exemplary embodiment of a housing manufacturing method, steps 403 and 404 may be omitted, so as to obtain the housing 100 shown in fig. 6, the housing 100 includes the substrate body 101 and the film body 102, and the substrate body 101 may include the first substrate 1, the first optical coating layer 3 on the back surface of the first substrate 1, and the anti-fingerprint film layer 4 on the surface of the fourth optical coating layer 2. The membrane body 102 may include a membrane 5, an OCA glue layer 7 located on the front side of the membrane 5, a UV texture layer 8 located on the back side of the membrane 5, a second optical coating layer 9 located on the surface of the UV texture layer 8, a first preset color layer 10 located on the surface of the second optical coating layer 9, and a first bottom-covering ink layer 11 located on the surface of the first preset color layer 10.

In another exemplary embodiment of the housing manufacturing method, step 403 may be omitted, so as to obtain the housing 100 shown in fig. 7, the housing 100 includes the substrate body 101 and the membrane body 102, and the substrate body 101 may include the first substrate 1, the first optical coating layer 3 on the back surface of the first substrate 1, and the anti-fingerprint film layer 4 on the front surface of the first substrate 1. The membrane body 102 may include a membrane 5, a third optical coating layer 6 located on the front side of the membrane 5, an OCA glue layer 7 located on the surface of the third optical coating layer 6, a UV texture layer 8 located on the back side of the membrane 5, a second optical coating layer 9 located on the surface of the UV texture layer 8, a first preset color layer 10 located on the surface of the second optical coating layer 9, and a first bottom-covering ink layer 11 located on the surface of the first preset color layer 10.

In yet another exemplary embodiment of the housing manufacturing method, step 404 may be omitted, so as to obtain the housing 100 shown in fig. 8, the housing 100 includes a substrate body 101 and a membrane body 102, and the substrate body 101 may include a first substrate 1, a fourth optical coating layer 2 on the front surface of the first substrate 1, a first optical coating layer 3 on the back surface of the first substrate 1, and an anti-fingerprint film layer 4 on the surface of the fourth optical coating layer 2. The membrane body 102 may include a membrane 5, an OCA glue layer 7 located on the front side of the membrane 5, a UV texture layer 8 located on the back side of the membrane 5, a second optical coating layer 9 located on the surface of the UV texture layer 8, a first preset color layer 10 located on the surface of the second optical coating layer 9, and a first bottom-covering ink layer 11 located on the surface of the first preset color layer 10.

It should be noted that: in the above embodiments, when there is no special requirement for the color of the housing 100, the step 408 can be omitted; when there is no special requirement for the fingerprint strength of the surface of the housing 100, step 411 may be omitted, and will not be described in detail herein.

To the technical solution of the present disclosure, the present disclosure also provides a method for preparing a casing, as shown in fig. 9, the method for preparing may include the following steps:

in step 901, a second substrate is prepared.

In this embodiment, the material of the second substrate and the process for preparing the second substrate may refer to the steps and methods in the embodiment shown in fig. 2, and are not described herein again.

In step 902, a fifth optical coating is formed on the front side of the second substrate.

In this embodiment, the front side of the second substrate can be understood as: when the case containing the second substrate is mounted to the electronic device, the front surface of the second substrate faces the outside of the electronic device. The fifth optical coating layer may be formed by a single optical coating process, or the fifth optical coating layer may be formed by stacking layers formed by multiple optical coating processes, which is not limited in this disclosure.

In step 903, a sixth optical coating is formed on the back side of the second substrate.

In this embodiment, the front side of the second substrate can be understood as: when the case containing the second substrate is mounted to the electronic device, the front surface of the second substrate faces the inside of the electronic device. The sixth optical coating layer may be formed by a single optical coating process, or the sixth optical coating layer may be formed by stacking layers formed by multiple optical coating processes, which is not limited in this disclosure.

In step 904, a second primer ink layer is formed on the sixth optical coating layer to obtain the housing.

In this embodiment, the second bottom-covering ink layer may be prepared on the sixth optical coating layer, so as to achieve a light-shielding effect and prevent a user from viewing the structure on the back side of the housing through the housing.

Furthermore, a second preset color layer can be formed on the sixth optical coating layer, the appearance color of the shell is adjusted through the second preset color layer, and then the second bottom covering ink layer is prepared on the surface of the second preset color layer.

According to the embodiments, the optical coating layers are respectively formed on the two sides of the second substrate, so that the reflectivity of the prepared shell is high, and the appearance effect of surface clearness is achieved.

With respect to the manufacturing process described in fig. 9, the housing 200 shown in fig. 10 may be obtained, where the housing 200 may include a second substrate 201, a fifth optical coating layer 202 located on the front surface of the second substrate 210, a sixth optical coating layer 203 located on the back surface of the second substrate 201, a second predetermined color layer 204 located on the surface of the sixth optical coating layer 203, and a second bottom-capping ink layer 205 located on the surface of the second predetermined color layer 204.

Of course, in other embodiments, the anti-fingerprint film layer 206 may also be formed on the surface of the fifth optical coating layer 202, which is not limited by the disclosure.

The shell obtained by the shell preparation method according to any embodiment of the disclosure or the shell according to any embodiment of the disclosure can obtain a corresponding electronic device. The electronic device may include a mobile phone terminal, a tablet terminal, an e-reader, etc., which is not limited by this disclosure.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. a preparation method of shell, is characterized in that, comprises:

respectively preparing a substrate body and a diaphragm body, and the diaphragm body includes a diaphragm;

The casing is obtained by laminating the diaphragm body and the substrate body;

Wherein, preparing the substrate body includes:

preparing a first substrate;

Prepare a first optical coating layer on one side of the first substrate;

The preparation of the membrane body includes:

forming a UV texture layer on the surface of the membrane;

Prepare a second optical coating layer on the surface of the UV texture layer;

A first undercoat ink layer is formed on the second optical coating layer.

2. The preparation method according to claim 1, wherein preparing the diaphragm body further comprises:

A third optical coating layer is prepared and formed on the surface of the film, and the film is located between the third optical coating layer and the UV texture layer.

3. The preparation method according to claim 1, wherein preparing the substrate body further comprises:

A fourth optical coating layer is formed on the surface of the first substrate, and the first substrate is located between the fourth optical coating layer and the first optical coating layer.

4. The preparation method according to claim 1, wherein the preparing and forming the first cover bottom ink layer on the second optical coating layer comprises:

The first undercoat ink layer is prepared on the surface of the first preset color layer.

5. The preparation method according to claim 1, wherein preparing the substrate body further comprises:

An anti-fingerprint film layer is prepared on one side of the first substrate opposite to the first optical coating layer.

6. The preparation method of the casing according to claim 1, wherein preparing the substrate body further comprises:

The substrate body is hardened prior to preparing the first optical coating layer.

7. The preparation method of the casing according to claim 1, wherein the preparation of the diaphragm body further comprises:

An OCA adhesive layer is formed on the side of the film sheet away from the UV texture layer, and the OCA adhesive layer is used for laminating the film body and the substrate body.

8. A casing, characterized in that it comprises: a diaphragm body and a substrate body attached to each other;

Wherein, the substrate body includes:

a first substrate and a first optical coating layer prepared on the surface of the first substrate;

The diaphragm body includes:

diaphragm;

a UV textured layer prepared on the surface of the membrane;

a second optical coating layer prepared on the surface of the UV texture layer;

A first undercoat ink layer is prepared and formed on the second optical coating layer.

9 . The housing according to claim 8 , wherein the diaphragm body further comprises a third optical coating layer prepared and formed on the surface of the diaphragm, and the diaphragm is located in the third optical coating layer. 10 . and the UV texture layer.

10. The housing according to claim 8, wherein the substrate body further comprises a fourth optical coating layer prepared and formed on the surface of the first substrate, the first substrate is located on the first substrate. between an optical coating layer and the fourth optical coating layer.

11. The housing according to claim 8, wherein the diaphragm body further comprises a first preset color layer, and the first preset color layer is located between the second optical coating layer and the first preset color layer. A cover between the bottom ink layers.

12. The housing according to claim 8, wherein the substrate body further comprises an anti-fingerprint film layer, and the first substrate is located between the anti-fingerprint film layer and the first optical coating layer. between.

13 . The casing according to claim 8 , wherein the casing further comprises an OCA adhesive layer, and the OCA adhesive layer is located between the diaphragm body and the first optical coating layer. 14 .

14. The housing according to claim 8, wherein the film comprises a PC film or a PET film.

15. The housing according to claim 8, wherein the first substrate comprises a plastic first substrate, a glass first substrate, or a glass fiber composite material first substrate.

16. A preparation method of a shell, characterized in that, comprising:

preparing a second substrate;

A fifth optical coating layer is formed on the front surface of the second substrate;

A sixth optical coating layer is formed on the backside of the second substrate;

A second cover bottom ink layer is prepared and formed on the sixth optical coating layer to obtain the casing.

17. The preparation method according to claim 16, wherein the preparing and forming the second bottom cover ink layer on the sixth optical coating layer comprises:

Prepare and form a second preset color layer on the surface of the sixth optical coating layer;

The second undercoating ink layer is prepared and formed on the surface of the second preset color layer.

18. A housing comprising:

the second substrate;

a fifth optical coating layer prepared on the front side of the second substrate;

a sixth optical coating layer prepared on the back of the second substrate;

A second bottom ink layer is prepared on the sixth optical coating layer.

19. The housing according to claim 18, further comprising a second preset color layer prepared on the sixth optical coating layer;

Wherein, the second cover bottom ink layer is located on the surface of the second preset color layer, and the second preset color layer is located between the second cover bottom ink layer and the sixth optical coating layer .

20. An electronic device, characterized in that it comprises a casing obtained by the preparation method according to any one of claims 1-7 and 16-17; or,

A housing as claimed in any one of claims 8-15 and claims 18-19.