CN216960426U

CN216960426U - Film layer structure, shell and electronic equipment

Info

Publication number: CN216960426U
Application number: CN202123165299.0U
Authority: CN
Inventors: 安怡; 孙坤; 王灿
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-07-12
Anticipated expiration: 2031-12-16

Abstract

The utility model relates to a rete structure, casing and electronic equipment, rete structure include base film, first decoration membrane unit and second decoration membrane unit, and the base film has relative first surface and the second surface that sets up, and along the thickness direction of base film, first decoration membrane unit is range upon range of in the first surface of base film, and second decoration membrane unit is range upon range of in the second surface of base film. In this disclosure, the second surface through setting up first decorative film unit and base film at the first surface of base film sets up second decorative film unit, has realized single membrane two plating structures, makes the rete structure have the thickness of individual layer rete structure and the stereovision of multilayer rete structure, effectively reduces the thickness of rete structure, promotes the aesthetic property of rete structure, makes it have more stereovision and more changeable visual effect.

Description

Film layer structure, shell and electronic equipment

Technical Field

The present disclosure relates to the field of electronic devices, and particularly to a film structure, a housing, and an electronic device.

Background

With the development of science and technology, in addition to the functions of electronic devices such as mobile phones and tablet computers becoming more and more powerful, consumers have also made higher demands on the appearance of the electronic devices.

At present, the shell of the electronic equipment is often designed to be transparent and combined with a decorative film layer, so that the attractiveness of the electronic equipment is improved, and the requirements of consumers are met. In order to meet the demands of consumers, the variety of decorative film layers is more and more diversified. However, when the variety of the decorative film layer is satisfied, the thickness of the decorative film layer is larger and larger, which is not beneficial to the thin design of the shell and influences the hand feeling of the user.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides a film layer structure, a case, and an electronic device.

According to a first aspect of embodiments of the present disclosure, there is provided a film layer structure comprising a base film, a first decorative film unit and a second decorative film unit, the base film having a first surface and a second surface disposed opposite to each other;

the first decorative film unit is laminated on a first surface of the base film, and the second decorative film unit is laminated on a second surface of the base film along a thickness direction of the base film.

Optionally, the first decorative film unit includes a first decorative film layer and a first coating layer, the first decorative film layer is laminated on the first surface of the base film, and the first coating layer is laminated on the surface of the first decorative film layer away from the base film;

the second decorative film unit comprises a second decorative film layer and a second coating film layer, the second decorative film layer is stacked on the second surface of the base film, and the second coating film layer is stacked on the surface of the second decorative film layer, which is far away from one side of the base film.

Optionally, the first coating layer and the second coating layer are both made of silicon oxide, niobium oxide and silicon nitride in a stacked mode, and the thickness of the first coating layer and the thickness of the second coating layer are both 200nm-600 nm.

Optionally, the first decorative film layer comprises a first UV texture layer having a thickness of 14-16 μ ι η, the second decorative film layer comprises a second UV texture layer having a thickness of 14-16 μ ι η;

wherein the texture of the first UV texture layer is the same as or different from the texture of the second UV texture layer.

Optionally, the base film is made of a polyethylene terephthalate material.

Optionally, the film layer structure further comprises a protective layer laminated on a surface of the second decorative film unit on a side away from the base film.

Optionally, the protective layer comprises an ink layer.

According to a second aspect of the embodiments of the present disclosure, there is provided a housing, the housing including a housing body and the film layer structure as described above, the film layer structure being attached to the housing body; wherein the surface of the shell body is provided with an effect layer.

Optionally, a glue layer is arranged on the surface of the film layer structure, and the film layer structure is attached to the shell body through the glue layer;

the glue layer is laminated on the surface of the first decorative film unit of the film layer structure.

Optionally, the glue layer is an optical grade OCA glue layer, and the thickness of the glue layer is 24-26 μm.

Optionally, the effect layer comprises a random arrangement of irregular rock-candy like crystal structures.

Optionally, the randomly arranged irregular rock-candy like crystal structures comprise one or more of frosted surfaces, burred surfaces, fluffy surfaces, and burred surfaces.

Optionally, the housing body is a 3D housing.

Optionally, the shell body includes a main body and an arc-shaped portion, the main body has an inner side face and an outer side face which are oppositely arranged, and the arc-shaped portion is formed by bending an end portion of the main body towards the inner side face of the main body;

the film layer structure is arranged on the inner side face of the main body and is respectively connected with the main body and the arc-shaped part through a glue layer of the film layer structure.

Optionally, the shell body is made of one or more of glass, sapphire, a transparent polymer material and a transparent composite material.

According to a third aspect of embodiments of the present disclosure, there is provided an electronic apparatus including the housing as described above.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: in this disclosure, the second surface through setting up first decorative film unit and base film at the first surface of base film sets up second decorative film unit, has realized single membrane two plating structures, makes the rete structure have the thickness of individual layer rete structure and the stereovision of multilayer rete structure, effectively reduces the thickness of rete structure, promotes the aesthetic property of rete structure, makes it have more stereovision and more changeable visual effect.

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 utility model and together with the description, serve to explain the principles of the utility model.

Fig. 1 is a schematic structural diagram of a film layer structure shown according to an exemplary embodiment.

Fig. 2 is a schematic structural view of a housing according to 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 embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the utility model, as detailed in the appended claims.

In the related art, the shells of electronic equipment such as mobile phones and tablet computers are mostly made of glass or composite plates, so that the shells have transparent areas, and film layer structures are attached to the transparent areas, so that the light sensation effect and the attractiveness of the electronic equipment are improved, and the visual requirements of users are met.

In order to pursue diversification of appearance design of electronic devices and achieve more layered and variable visual effects, a film structure is often attached to the inside of the housing. The film layer structure comprises a single-layer film layer structure and a multi-layer film layer structure, and the single-layer film layer structure is single in layering sense and free of variability; the multilayer membranous layer structure is piled up by a plurality of individual layer membranous layer structures and forms, and every two adjacent individual layer membranous layer structures are connected by the glue film, make the whole thickening of multilayer membranous layer structure, are unfavorable for the slim design of casing.

The utility model provides a film layer structure, film layer structure include base film, first decoration membrane unit and second decoration membrane unit, and the base film has relative first surface and the second surface that sets up, and along the thickness direction of base film, first decoration membrane unit stacks up in the first surface of base film, and second decoration membrane unit stacks up in the second surface of base film. In this disclosure, the second surface through setting up first decorative film unit and base film at the first surface of base film sets up second decorative film unit, has realized single membrane two plating structures, makes the rete structure have the thickness of individual layer rete structure and the stereovision of multilayer rete structure, effectively reduces the thickness of rete structure, promotes the aesthetic property of rete structure, makes it have more stereovision and more changeable visual effect.

In an exemplary embodiment, as shown in fig. 1 and 2, a film layer structure 1 is attached to a housing 2 to improve the aesthetic property of the housing 2. The housing 2 may be, for example, a battery cover of an electronic device, or a decorative cover of a camera trim. The shell 2 has a 3D three-dimensional shape, so that smoothness of the shell 2 is improved, and the requirement of hand feeling when a user holds the shell 2 is met.

The film layer structure 1 includes a base film 11, a first decorative film unit 12, and a second decorative film unit 13, the base film 11 having a first surface and a second surface that are oppositely disposed.

Among them, the base film 11 is made of a resin material such as polyethylene terephthalate (PET), so that the base film 11 has excellent physical and mechanical properties in a wide temperature range. The base film 11 has excellent electrical insulation properties, good electrical properties at high temperature and high frequency, and good fatigue resistance, friction resistance, and dimensional stability.

The first decorative film unit 12 is laminated on a first surface of the base film 11, and the second decorative film unit 13 is laminated on a second surface of the base film 11 in a thickness direction (refer to a Z-axis shown in fig. 1) of the base film 11.

Through corresponding first decoration membrane unit 12 and the second decoration membrane unit 13 that sets up respectively on the first surface and the second surface at base film 11, formed single membrane two and plated the structure, make rete structure 1 have more stereovision and changeable visual effect, satisfy the user to the demand of outward appearance. Compared with the traditional double-layer film structure, the single-film double-plating structure is thinner and is at least 75 micrometers thinner than the double-layer film structure.

In this embodiment, as shown in fig. 1 and fig. 2, the first decoration film unit 12 includes a first decoration film layer 121 and a first coating film layer 122, the first decoration film layer 121 is laminated on the first surface of the base film 11, and the first coating film layer 122 is laminated on the surface of the first decoration film layer 121 on the side away from the base film 11.

The first decoration film layer 121 includes a first UV texture layer, the texture of which may be achieved by laser-formed mold UV transfer, such as roll-to-roll transfer or sheet transfer. The thickness of the first UV texturing layer is 14 μm to 16 μm, wherein a thickness of 15 μm is most effective.

The first plating layer 122 is formed on the surface of the first decorative film layer 121 by magnetron sputtering or evaporation, that is, by vacuum plating (NCVM). The magnetron sputtering coating is, for example, a roll-to-roll coating or a sheet coating. The first coating layer 122 is formed by stacking silicon oxide, niobium oxide and silicon nitride, and the thickness of the first coating layer 122 is 200nm-600nm, which is the best effect.

In this embodiment, as shown in fig. 1 and fig. 2, the second decoration film unit 13 includes a second decoration film layer 131 and a second coating film layer 132, the second decoration film layer 131 is laminated on the second surface of the base film 11, and the second coating film layer 132 is laminated on the surface of the second decoration film layer 131 far from the base film 11.

The second decorative film layer 131 includes a second UV texture layer, the texture of which may be achieved by laser-formed mold UV transfer, such as roll-to-roll transfer or sheet transfer. The thickness of the second UV texturing layer is 14 μm to 16 μm, wherein a thickness of 15 μm is most effective.

The texture of the first UV texture layer and the texture of the second UV texture layer can be different, so that the film layer structure 1 has different texture effects, is layered, and improves the attractiveness of the film layer structure 1.

Of course, it is understood that the texture of the first UV texture layer and the texture of the second UV texture layer may also be the same, and the superimposed texture effect makes the texture of the film layer structure 1 deeper, specifically based on the actual design.

The second plating layer 132 is formed on the surface of the second decorative film layer 131 by magnetron sputtering or evaporation, that is, by vacuum plating (NCVM). The magnetron sputtering coating may be, for example, a roll-to-roll coating or a sheet coating. The second coating layer 132 may be, for example, silicon oxide, niobium oxide, or silicon nitride stacked in sequence, and the thickness of the second coating layer is 200nm to 600 nm.

The front and back surfaces of the base film 11 are coated with films to form the film layer structure 1, the thickness of the film layer structure 1 is reduced by at least 75 micrometers compared with the whole thickness of a double-layer film layer structure (namely, each base film is coated with a film respectively), the whole thickness of the film layer structure 1 is effectively reduced, and when the film layer structure is attached to the shell 2, the thinning design of the shell 2 is favorably realized.

In this embodiment, as shown in fig. 1 and fig. 2, the film structure 1 further includes a protection layer 15, the protection layer 15 is formed by laminating the second decoration film unit on the surface of the second decoration film unit 13 away from the base film 11, the protection layer 15 is disposed on one side, and when the film structure 1 is disposed on the casing 2, the protection layer 15 is the outermost side, i.e., the side away from the casing 2, so as to protect the film structure 1 from oxidation, and avoid being subjected to factors such as friction, and thus, the service life of the film structure is not affected. Meanwhile, the protective layer 15 can enhance the reflection effect, highlight the texture of the UV texture layer and the color of the coating layer, and improve the display effect.

The protective layer 15 is coated on the surface of the second decorative film unit 13 or the first decorative film unit 12 by a screen printing method, and the protective layer 15 includes an ink layer, so that an overall color effect is presented, and the second decorative film unit 13 or the first decorative film unit 12 is protected.

The membranous layer structure in this disclosure, the positive, the negative two sides of individual layer base film set up texture and coating film, make membranous layer structure have better outward appearance feel, effectively attenuate membranous layer structure's whole thickness. The second decorative film unit or the first decorative film unit of the film structure is protected by the protective layer, so that the production yield of the film structure is improved.

The shell comprises a shell body and a film layer structure in any one of the embodiments, wherein the film layer structure is attached to the shell body, the surface of the shell body is provided with an effect layer, the shell is more attractive, and the requirement of a user on the appearance of the shell is met.

In an exemplary embodiment, as shown in fig. 1 and 2, a housing 2, the housing 2 is a 3D housing. Casing 2 includes shell body and rete structure 1, and the rete structure 1 pastes and locates the shell body, and wherein, the surface of shell body has the effect layer, and rete structure 1 produces the stack effect with the effect layer on the surface of shell body, makes casing 2 have more stereovision and variety, promotes casing 2's visual effect, makes casing 2 have market competition more.

The shell body can be made of one or more of glass, sapphire, transparent polymer material and transparent composite material. The glass is silicate glass, or Polycarbonate (PC), or polymethyl methacrylate (PMMA), or a composite material of Polycarbonate (PC) and polymethyl methacrylate (PMMA).

The film layer structure is provided with a transparent area, and the film layer structure 1 is attached to the surface of the transparent area, so that a user can see the appearance effect brought by the film layer structure 1 through the transparent area.

In this embodiment, as shown in fig. 1 and fig. 2, a glue layer 14 is disposed on a surface of the film layer structure, and the film layer structure 1 is attached to the shell body through the glue layer 14.

Wherein, the glue layer 14 is laminated on the surface of the first decorative film unit 12 of the film layer structure 1, that is, the opposite side of the protective layer 15 arranged on the film layer structure 1, so as to ensure that the film layer structure 1 can be attached to the shell body. Meanwhile, the texture and color of the first decorative film unit 12 and the second decorative film unit 13 can be displayed through the housing 2 and the adhesive layer 14, so that the requirement of the user on the appearance can be met.

The adhesive layer 14 can be an optical oca (optical Clear adhesive) adhesive layer, and has the characteristics of colorless transparency, light transmittance of more than 95%, good adhesive strength, capability of being cured at room temperature or intermediate temperature, small curing shrinkage and the like.

The adhesive layer 14 may be formed on the first decorative film unit 12 or the second decorative film unit 13 by any one of roll coating, roll sticking, and sheet sticking, and the thickness of the adhesive layer 14 is 24-26 μm, wherein the thickness of the adhesive layer 14 is 25 μm, i.e., better adhesion can be achieved.

In this embodiment, as shown in fig. 1 and 2, the effect layer includes irregular rock-candy-like crystal structures arranged randomly. Wherein the crystal sugar-like crystal structure comprises one or more of frosted surface, diamond flash surface, fluff surface and flash sand surface.

When the effect layer has a glittering sand surface effect, the shell 2 can be formed by chemical corrosion and microscopically has a crystal sugar-like crystal structure which is randomly arranged and grows outwards.

In one example, the housing 2 is immersed in a bath of a solution of hydrochloric acid and is rocked at a speed of between 5mm/s and 30mm/s, the rocking speed being adjusted according to the degree of scintillation of the shiny sand surface. Wherein the temperature of the corrosive liquid in the liquid medicine tank is 15-55 ℃, and the effect is best. Too high or too low temperature may affect the corrosion effect, adversely affect the crystal growth, and show poor appearance.

In this embodiment, as shown in fig. 1 and 2, the housing body includes a main body 21 and an arc portion 22, the main body 21 has an inner side and an outer side that are opposite to each other, the arc portion 22 is formed by bending an end of the main body 21 toward the inner side of the main body 21, so that the housing 2 has a 3D three-dimensional shape, the smoothness of the housing 2 is improved, and the requirement for hand feeling when a user holds the housing 2 is met.

Wherein, membranous layer structure 1 sets up in the medial surface of main part 21, and membranous layer structure 1 is connected with main part 21 and arc portion 22 respectively through its glue film 14.

The coating process of the shell 2 can adopt a vacuum profiling laminating mode, so that the film layer structure 1 is more laminated with the shell 2, the binding force of the film layer structure 1 is improved, and the generation of bubbles between the film layer structure 1 and the shell 2 is avoided, thereby influencing the attractiveness.

In an example, rete structure 1 is fixed in the surface of casing 2, because casing 2 is 3D spatial structure, and the laminating has the degree of difficulty, and pellosil 3 has elasticity, and when pellosil 3 extruded rete structure 1, can produce elastic deformation, makes its deformation agree with mutually with casing 2's shape, guarantees that rete structure 1 can be extruded. Therefore, the film layer structure 1 is pressed by the silica gel film 3, so that the laminating difficulty can be reduced.

And (3) performing vacuum pumping treatment by adopting a disposable packaging bag, placing the shell 2 provided with the silica gel membrane 3 in the disposable packaging bag, and performing vacuum pumping on the disposable packaging bag at a vacuum degree of-0.1 Mpa to ensure that the silica gel membrane 3 can be completely attached to the surface of the membrane layer structure 1. Wherein, the silica gel diaphragm 3 is the lamellar structure, and the thickness of silica gel diaphragm 3 is less than 1mm, and the length dimension, the width dimension of silica gel diaphragm 3 correspond length dimension, the width dimension that are greater than casing 2 for silica gel diaphragm 3 can cover whole casing 2, further guarantees that silica gel diaphragm 3 can cover whole membranous layer structure 1.

When the shell 2 attached with the silica gel membrane 3 is placed in a warm isostatic pressing machine (not shown in the figure), namely a disposable packaging bag is directly placed in a cavity of the warm isostatic pressing machine, and pressure is transferred through liquid in the cavity, so that the surface of the shell 2 is subjected to equal pressure. The pressure may be, for example, 20Mpa to 70Mpa, wherein the predetermined pressure is greater than 30Mpa, and the housing 2 is stressed most effectively. The micro-bubbles in the arc-shaped part 22 are driven out under the extrusion of the silica gel membrane 3, so that the situation that the micro-bubbles are gathered into large bubbles at the corner part to influence the appearance and the performance of the shell 2 due to the heating of the decorative membrane 3 in the subsequent baking process is avoided. The baking temperature is 50-90 ℃, wherein, the bubble removing effect is best when the baking temperature is 60 ℃, and the binding force between the film layer structure 1 and the shell 2 is improved.

And (3) removing bubbles by using a warm isostatic pressing machine, taking out the disposable packaging bag, taking out the coated shell 2, and removing the silicon membrane 3. After the silica gel membrane 3 is removed, the surface of the protective layer 15 of the membrane structure 1 of the shell 2 is wiped by alcohol, so that the problem of surface energy caused by using the silica gel membrane 3 is solved.

Wherein, pellosil piece 3 can use repeatedly for next casing 2 removes the bubble, saves the consumptive material cost of laminating in-process. The utility model provides a casing that has the effect layer in this disclosure, the range upon range of setting of casing and membranous layer structure makes the combination of superposing of flash of light sand face on the casing and membranous layer structure, further promotes the aesthetic property of casing.

The casing is the 3D casing, has main part and arc portion, and during laminating membranous layer structure, its main part and arc portion all do not have the bubble, promote the cohesion between membranous layer structure and the casing, and membranous layer structure subsides establish effectually, makes the casing possess the aesthetic property.

The surface of the adhesive layer structure is provided with the adhesive layer so as to be convenient for being connected with parts such as a shell and the like, and the attachment becomes more reliable.

The effect layer of casing has better feeling, and its anti fingerprint, sense of touch and outward appearance all promote to some extent, make the casing have market competition more.

The present disclosure also proposes an electronic device comprising a housing as in the above embodiments. The electronic equipment is, for example, a mobile phone, a tablet computer and wearable equipment, so that the attractiveness of the electronic equipment is improved, the hand feeling of a user during holding is improved, and the use experience of the user is improved.

Other embodiments of the utility model will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application 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 utility model being indicated by the following claims.

It will be understood that the utility model 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 utility model is limited only by the appended claims.

Claims

1. The film layer structure is characterized by comprising a base film, a first decorative film unit and a second decorative film unit, wherein the base film is provided with a first surface and a second surface which are oppositely arranged;

2. The film layer structure of claim 1, wherein the first decorative film unit comprises a first decorative film layer and a first coating layer, the first decorative film layer is laminated on the first surface of the base film, and the first coating layer is laminated on the surface of the first decorative film layer far away from the base film;

3. The film structure of claim 2, wherein the first coating layer and the second coating layer are made of silicon oxide, niobium oxide, and silicon nitride stacked in sequence, and the first coating layer and the second coating layer have a thickness of 200nm to 600 nm.

4. The film layer structure of claim 2, wherein the first decorative film layer comprises a first UV texture layer having a thickness of 14-16 μ ι η, the second decorative film layer comprises a second UV texture layer having a thickness of 14-16 μ ι η;

5. The film layer structure of claim 1, wherein the base film is made of a polyethylene terephthalate material.

6. The film layer structure as recited in claim 1, further comprising a protective layer laminated to a surface of the second decorative film unit on a side away from the base film.

7. The film layer structure of claim 6, wherein the protective layer comprises an ink layer.

8. A housing, comprising a housing body and a film structure according to any one of claims 1 to 7, wherein the film structure is attached to the housing body; wherein the surface of the shell body is provided with an effect layer.

9. The shell according to claim 8, wherein a glue layer is disposed on a surface of the film layer structure, and the film layer structure is attached to the shell body through the glue layer;

10. The housing of claim 9, wherein the glue layer is an optical grade OCA glue layer, the glue layer having a thickness of 24-26 μ ι η.

11. The case of claim 10, wherein the effect layer comprises a random arrangement of irregular rock-candy-like crystal structures.

12. The housing of claim 11, wherein the rock-candy crystal structure comprises one or more of a frosted surface, a burred surface, a fluffed surface, and a burred surface.

13. The housing of claim 11, wherein the housing body is a 3D housing.

14. The housing of claim 13, wherein the shell body includes a main body having an inner side and an outer side opposite to each other, and an arc portion formed by bending an end of the main body toward the inner side of the main body;

15. The housing of claim 13, wherein the shell body is made of glass or sapphire.

16. An electronic device, characterized in that the electronic device comprises a housing according to any of claims 8-15.