CN212097797U - Ceramic and glass composite shell for mobile terminal to be light and thin - Google Patents
Ceramic and glass composite shell for mobile terminal to be light and thin Download PDFInfo
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- CN212097797U CN212097797U CN201922495247.6U CN201922495247U CN212097797U CN 212097797 U CN212097797 U CN 212097797U CN 201922495247 U CN201922495247 U CN 201922495247U CN 212097797 U CN212097797 U CN 212097797U
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Abstract
The utility model discloses a light and thin ceramic and glass composite shell of a mobile terminal, which comprises a ceramic layer or a glass layer and a non-metallic composite material layer; the non-metal composite material layer is attached to the inner surface of the ceramic layer or the glass layer; or the non-metal composite material layer is attached to the inner surface of the ceramic layer or the glass layer through the buffer layer. The light and thin ceramic and glass shell of the utility model is made of non-metallic materials, which is more beneficial to the transmission of signals in the 5G era compared with metal composite materials; the appearance is covered by full ceramics and glass, so that the appearance is more attractive; compared with the all-ceramic or glass shell with the same structure, the weight is greatly reduced.
Description
Technical Field
The utility model relates to a mobile terminal casing, concretely relates to mobile terminal frivolousization pottery, glass composite casing.
Background
Electronic products such as mobile phone terminals, smart watches, smart appliances, etc. have become an indispensable part of people's daily life. Along with the rapid development of electrical intelligent technology, the functions of mobile terminals and intelligent electronic products are more and more powerful, the energy consumption is gradually increased, and the whole weight of corresponding hardware modules such as batteries is also increased.
At present, the mobile terminal casing is mainly made of metal, glass and ceramic. Wherein, the metal shell is subjected to T treatment on the surface of a metal matrix, nano injection molding on the metal matrix, finish machining, polishing, surface anode treatment and other processes. However, due to the conductivity of the metal material, the metal battery cover has an interference shielding effect on radio frequency signal transmission, and a plastic composite partition is often required to be performed on the metal battery cover, so that signal transmission interference is reduced. The formed plastic has poor affinity with metal, nano holes and an activating agent are formed on the surface of the aluminum alloy by T treatment with complex process and poor environmental protection, and the plastic and a metal piece can form excellent occlusion effect after injection molding. However, the basic starting point of the composite of plastic and metal is not the light weight of the housing, and the high requirements of communication technology on signal transmission cannot be met gradually. The method also adopts the method of separately attaching the inner linings of the middle frame and the bottom of the mobile terminal equipment, wherein the middle frame is generally an injection molding part, and the bottom of the middle frame is plastic. The separate attaching method has complicated working procedures, the attaching is not integrated, the performance of the joint of the middle frame and the bottom is different, and stress points are easily generated at the joint.
With the gradual maturity of the 5G communication technology, the mainstream mobile terminal device shell is gradually demetalized, and is more biased to adopt a ceramic or glass material, so as to match the high-frequency transmission of millimeter waves in the 5G communication technology. However, zirconia (microcrystalline zirconium) ceramics and glass have large density and heavy hand feeling, which affects the use experience.
Disclosure of Invention
An object of the utility model is to overcome the weak point that prior art exists and provide a mobile terminal frivolousization pottery, the compound casing of glass.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a light and thin ceramic and glass composite shell of a mobile terminal comprises a ceramic layer or a glass layer and a non-metal composite material layer;
the non-metal composite material layer is attached to the inner surface of the ceramic layer or the glass layer;
or the non-metal composite material layer is attached to the inner surface of the ceramic layer or the glass layer through the buffer layer.
Ceramic and glass shells are hard and brittle materials, and the impact resistance is poor. Mobile terminal frivolous pottery, the compound casing of glass adopt pottery or glass and other low and the high material of intensity of density to compound, utilized pottery, glass's hard performance promptly, combined non-metallic material's toughness again, great promotion shock resistance when keeping pottery, ceramic outward appearance feel. In addition, plastic replacement for opening holes is not needed for solving the problem of signal shielding, and the integration of the shell is realized. The ceramic and glass are preferably one of 2.5D and 3D, Unibody, but not limited to these structures. The light and thin ceramic and glass shell of the utility model is made of non-metallic materials, which is more beneficial to the transmission of signals in the 5G era compared with metal composite materials; the appearance is covered by full ceramics and glass, so that the appearance is more attractive; compared with the all-ceramic or glass shell with the same structure, the weight is greatly reduced. In the shell, the buffer layer can consume part of the impact energy and transmit the impact energy to the non-metal composite layer. The utility model discloses in the internal surface on ceramic layer or glass layer is the surface relative with the surface, the surface of internal surface for being close to the inside spare part of mobile terminal, the surface of surface for keeping away from the inside spare part of mobile terminal.
Preferably, the outer surface of the back plate rear cover is a ceramic layer or a glass layer, the outer surface of the middle frame is a ceramic layer or a glass layer, and the inner surface of the back plate rear cover and/or the middle frame is/are provided with a non-metal composite material layer. More preferably, the back plate rear cover and the middle frame are both provided with non-metal composite materials. The back cover of the back plate can be a plane or a curved surface.
Preferably, the material of the non-metal composite material layer is glass fiber prepreg, aramid fiber prepreg, PP bidirectional prepreg, modified carbon fiber prepreg, epoxy glass fiber board, Kevlar fiber board, polypropylene fiber board or polyamide board.
Preferably, the buffer layer is an epoxy resin layer, an acrylate adhesive layer or a modified polyurethane adhesive layer.
Preferably, the tensile strength of the glass fiber prepreg, the aramid fiber prepreg, the PP bidirectional prepreg or the modified carbon fiber prepreg after thermosetting is not less than 600MPa, and the bonding force with the ceramic layer or the glass layer is not less than 70N.
The buffer layer and the non-metal composite material layer can be made of materials which have uniform thickness and are perfectly matched with the ceramic layer or the glass layer.
Preferably, the thickness of the non-metal composite material layer is less than or equal to 0.5mm, the thickness of the ceramic layer or the glass layer is less than or equal to 1.0mm, and the thickness of the buffer layer is 50-80 μm.
Preferably, the thickness of the ceramic layer or the glass layer is 0.2-0.45 mm, and the thickness of the non-metal composite material layer is 0.1-0.3 mm at the back cover of the back plate.
Preferably, the thickness difference between any two points of the back plate back cover is less than or equal to 0.1mm, and the thickness of the back plate back cover is 0.25-0.9 mm.
Preferably, the thickness difference between any two points of the back plate back cover is larger than 0.1mm, and the thickness of the back plate back cover is 0.3-0.45 mm.
Preferably, the weight of the non-metal composite material layer is less than or equal to 15 g; the weight of the ceramic layer is less than or equal to 30g, and the weight of the glass layer is less than or equal to 20 g.
Preferably, the preparation method of the light and thin ceramic and glass composite shell of the mobile terminal comprises the following steps: processing the ceramic or glass to a finished product, primarily curing the non-metal composite material, aligning and adhering the non-metal composite material to the inner surface of the ceramic or glass, and finally heating and pressing the non-metal composite material to obtain the composite shell. The primary curing means that the curing degree is 10-20% of the complete curing degree. When the preparation method is adopted, the non-metal composite material layer is preferably at least one of a glass fiber prepreg, an aramid fiber prepreg, a PP bidirectional prepreg and a modified carbon fiber prepreg.
Preferably, the preparation method of the light and thin ceramic and glass composite shell of the mobile terminal comprises the following steps: processing the ceramic or glass into a finished product, coating a buffer layer material on the inner surface of the ceramic or glass to form a buffer layer, attaching the primarily cured nonmetal composite material on the buffer layer in an aligned manner, and finally heating and pressing to obtain the composite shell. When the preparation method is adopted, the non-metal composite material layer is preferably at least one of a glass fiber prepreg, an aramid fiber prepreg, a PP bidirectional prepreg and a modified carbon fiber prepreg.
Preferably, the preparation method of the light and thin ceramic and glass composite shell of the mobile terminal comprises the following steps: processing the ceramic or glass into a finished product, coating a buffer layer material on the inner surface of the ceramic or glass to form a buffer layer, stamping and profiling the non-metal composite material, aligning and laminating the non-metal composite material on the buffer layer, and finally heating and laminating to obtain the composite shell. When the preparation method is adopted, the non-metal composite material layer is preferably at least one of an epoxy glass fiber board, a Kevlar fiber board, a polypropylene fiber board and polyamide.
Preferably, the thermal deformation temperature of the epoxy glass fiber board, the Kevlar fiber board, the polypropylene fiber board and the polyamide is 20-220 ℃, and the material shaping and cooling interval is 40-80 ℃. Preferably, the tensile strength of the glass fiber prepreg, the aramid fiber prepreg, the PP bidirectional prepreg and the modified carbon fiber prepreg after curing is not lower than 600 MPa.
Preferably, the preparation method of the light and thin ceramic and glass composite shell of the mobile terminal comprises the following steps: roughly processing the ceramic or glass, coating a buffer layer material on the inner surface of the roughly processed ceramic or glass to form a buffer layer, punching and profiling the non-metal composite material, aligning and laminating the non-metal composite material on the buffer layer, and heating and laminating to obtain a blank of the composite shell; and carrying out finish machining on the blank of the composite shell to obtain the composite shell. When the preparation method is adopted, the non-metal composite material layer is preferably at least one of an epoxy glass fiber board, a Kevlar fiber board, a polypropylene fiber board and polyamide. The processing technology of processing the ceramic or the glass to a finished product and then forming the buffer layer has limited processing limit of the processing thickness of the ceramic, cannot be thinned any more, has small weight reduction range on the shell, and has larger ceramic thinning degree by adopting the method of forming the buffer layer after rough processing, thereby being more beneficial to reducing the weight of the product.
Preferably, the finishing comprises the following steps in sequence: a. carrying out CNC machining on the inner surface; b. grinding and thinning the ceramic layer or the glass layer; c. and carrying out CNC (computer numerical control) shape processing, rough polishing, punching and fine polishing on the ceramic layer or the glass layer.
The ceramic and the glass are hard and brittle materials, so the machining performance is poor and the machining cost is high; the composite shell of the utility model is preferably prepared by adopting the four preparation processes, thereby greatly reducing the processing procedures of ceramics and glass and reducing the processing difficulty and cost of ceramics and glass from the process conversion angle; the ceramic and glass material is applied to the mobile terminal shell and has a market field effect. The back cover manufactured by the preparation process is an integrated composite shell,
the beneficial effects of the utility model reside in that: the utility model provides a mobile terminal frivolous pottery, the compound casing of glass. The light and thin ceramic and glass shell of the utility model is made of non-metallic materials, which is more beneficial to the transmission of signals in the 5G era compared with metal composite materials; the appearance is covered by full ceramics and glass, so that the appearance is more attractive; compared with the all-ceramic or glass shell with the same structure, the weight is greatly reduced.
Drawings
Fig. 1 is a schematic structural diagram of a lightweight, thin ceramic and glass composite housing of a mobile terminal according to embodiments 1 to 24; wherein, 1, ceramic layer or glass layer; 2. a buffer layer; 3. a non-metallic composite material layer;
fig. 2 is a schematic structural diagram of a lightweight, thin ceramic and glass composite housing of the mobile terminal according to embodiments 25 to 30; wherein, 4, ceramic layer or glass layer; 5. a non-metallic composite layer.
Detailed Description
For better illustrating the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following embodiments.
Examples 1 to 24
The structural schematic diagram of the lightweight, thin ceramic and glass composite housing of the mobile terminal in embodiments 1 to 24 is shown in fig. 1, where the lightweight, thin ceramic and glass composite housing of the mobile terminal includes a ceramic layer or a glass layer 1, a buffer layer 2 and a non-metallic composite layer 3; the non-metal composite material layer 3 is attached to the inner surface of the ceramic layer or the glass layer 1 through the buffer layer 2,
the materials, weight and thickness parameters of the ceramic layer, the glass layer, the buffer layer and the non-metal composite material layer are shown in the table 1 and the table 2.
In embodiments 1 to 24, when the buffer layer is made of an epoxy resin adhesive, the epoxy resin adhesive contains the following components in percentage by weight: the epoxy resin adhesive comprises the following components in percentage by weight: 20% of bisphenol A epoxy resin, 40% of bisphenol F epoxy resin, 27.6% of amine curing agent, 1.2% of coupling agent, 4.5% of tertiary amine accelerator, 4.8% of toughening agent and 1.9% of fumed silica.
In embodiments 1 to 24, when the non-metallic composite material layer is a glass fiber prepreg, an aramid fiber prepreg, a PP bidirectional prepreg, or a modified carbon fiber prepreg, the method for preparing the light and thin ceramic-glass composite shell of the mobile terminal includes the following steps:
1. processing the ceramic or glass into a finished sheet;
2. coating a buffer layer on the inner surface of the ceramic or glass;
3. preliminarily solidifying the non-metal composite material layer, and aligning the non-metal composite material layer with the ceramic or glass shell through a special fixture;
4. and heating and pressurizing the aligned sample by a vacuum pressing machine, and curing to obtain the light and thin ceramic and glass composite shell of the mobile terminal.
In embodiments 1 to 24, when the non-metallic composite material layer is an epoxy glass fiber board, a kevlar fiber board, a polypropylene fiber board, or polyamide, the method for preparing the light and thin ceramic and glass composite housing for the mobile terminal is the first method or the second method:
the first method comprises the following steps:
1. processing the ceramic or glass into a finished sheet;
2. cutting the non-metal composite material into a proper size, then stamping, profiling and cooling the non-metal composite material to obtain a non-metal composite material layer;
3. and placing the finished ceramic or glass shell on a special jig, coating a buffer layer on the inner surface, aligning the buffer layer with the nonmetal composite material layer, and heating, pressurizing and pressing the buffer layer by a vacuum pressing machine to obtain the light and thin ceramic or glass composite shell of the mobile terminal.
The second method comprises the following steps:
1. roughly processing the ceramic or glass;
2. cutting the non-metal composite material into a proper size, then stamping, profiling and cooling the non-metal composite material to obtain a non-metal composite material layer;
3. placing the rough ceramic and glass shell on a special jig, coating a buffer layer on the inner bottom, aligning the rough ceramic and glass shell with the nonmetal composite material layer, and then heating, pressurizing and pressing the rough ceramic and glass shell by a vacuum pressing machine to obtain a blank body of the composite shell;
4. and (3) performing finish machining on the blank of the composite shell sequentially as follows: a. carrying out CNC machining on the inner surface; b. grinding and thinning the ceramic layer or the glass layer; c. and carrying out CNC (computer numerical control) shape processing, rough polishing, punching and fine polishing on the ceramic layer or the glass layer to obtain the light and thin ceramic and glass composite shell of the mobile terminal.
Examples 25 to 30
The structural schematic diagram of the lightweight, thin ceramic and glass composite housing of the mobile terminal in embodiments 25 to 30 is shown in fig. 2, where the lightweight, thin ceramic and glass composite housing of the mobile terminal includes a ceramic layer or a glass layer 4 and a non-metal composite layer 5; the non-metal composite material layer 5 is attached to the inner surface of the ceramic layer or the glass layer 4; the materials, weights and thickness parameters of the ceramic layer, the glass layer, the buffer layer and the non-metal composite material layer are shown in table 1 and table 2, wherein the weight reduction ratio (pure shell mass-light and thin structure mass)/pure shell mass is 100%.
The method for manufacturing the light and thin ceramic and glass composite shell of the mobile terminal in the embodiment 25-30 includes the following steps:
1. processing the ceramic or glass into a finished sheet;
2. preliminarily solidifying the non-metal composite material layer, and aligning the non-metal composite material layer with the ceramic or glass shell through a special fixture;
3. and heating and pressurizing the aligned sample by a vacuum pressing machine, and curing to obtain the light and thin ceramic and glass composite shell of the mobile terminal.
TABLE 1 parameters one of the composite shells described in examples 1-30
From table 2, can see that with the same thickness dimension with pure ceramic or glass casing compare, compound casing can effectively reduce weight.
TABLE 2 parameters two for the composite shells described in examples 1-30
Example 31
Test the mobile terminal frivolous performance of ceramic, the compound casing of glass.
(1) Ball drop test
The test conditions were: ceramic, specification 55 x 55mm, 130g steel ball, bearing object PVC hollow clamp, impacting ceramic plate by freely falling from steel ball with height of 6cm, once every height, rising for 2cm each time until crack appears on ceramic surface; the test results are shown in table 3.
Table 3 ball drop test results
As can be seen from table 3, the impact performance of the composite shell with different thickness is improved to a different extent compared with the pure ceramic shell with the same specific thickness.
(2) Environmental testing
The method comprises a cold and hot impact test, a constant temperature and humidity test, a high and low temperature storage test, a salt spray test, a water boiling test and the like; the specific test conditions were as follows:
a) cold and hot shock test conditions: low temperature of-40 deg.C (1h), and high temperature of 75 deg.C (1h) within 1 min; the number of cycles: 40 cycles (80 h);
b) constant temperature and humidity test conditions: temperature, 75 ℃; humidity, 91% -95%; time 168 h;
c) low temperature storage test conditions: temperature, -40 degrees centigrade; time, 96 h;
d) high temperature storage test conditions: temperature, 75 ℃; time, 96 h;
e) boiling test conditions: water bath at 80 deg.C for 30min, and product can not contact the container wall;
f) salt spray test conditions: temperature, 35 ℃; NaCl concentration, 5%; the pH value is 6.5-7.2; time, 96 h.
g) Aging test conditions: 140 degrees; humidity is 100%; time, 5 h.
And (4) environmental test results: after the above various environmental tests, the bonding interface between the ceramic or glass member and the non-metal composite layer in the composite shell according to embodiments 1 to 30 does not peel.
(3) Drop test
And performing drop tests on the shell after the environment test, including a complete machine drop test, a roller drop test and a sand paper drop test.
1. And (3) complete machine drop test: the falling height is 1.0-1.5 m, and the falling direction is four edges of the periphery of the product and the large surface of the ceramic component;
2. roller drop test: drum height 1.0m, test period 75 cycles, 2 cycles.
3. And (3) abrasive paper drop test: the falling height is 1.0-1.5 m, and the falling direction is the large surface of the ceramic component.
The drop test results are as follows: after a drop test, slight depressions and deformation are formed on the surface of the non-metal composite layer of the composite shell in the embodiment 1-30; however, the bonding interface between the ceramic or glass member and the non-metal composite layer is still firmly bonded, and no peeling phenomenon occurs.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. A mobile terminal light and thin ceramic and glass composite shell is characterized by comprising a ceramic layer or a glass layer and a non-metal composite material layer;
the non-metal composite material layer is attached to the inner surface of the ceramic layer or the glass layer;
or the non-metal composite material layer is attached to the inner surface of the ceramic layer or the glass layer through the buffer layer.
2. The thin and light ceramic and glass composite housing for a mobile terminal according to claim 1, wherein the composite housing comprises a rear cover and a middle frame, the outer surface of the rear cover is a ceramic layer or a glass layer, the outer surface of the middle frame is a ceramic layer or a glass layer, and the inner surface of the rear cover and/or the middle frame is provided with a non-metal composite layer.
3. The lightweight thin ceramic-glass composite case for a mobile terminal as claimed in claim 2, wherein the back plate and the inner surface of the middle frame are both provided with a non-metallic composite layer.
4. The thin and light ceramic-glass composite shell of claim 1, wherein the non-metal composite material layer is made of glass fiber prepreg, aramid fiber prepreg, PP bi-directional prepreg, modified carbon fiber prepreg, epoxy glass fiber board, kevlar fiber board, polypropylene fiber board or polyamide board.
5. The thin and light ceramic-glass composite case for a mobile terminal according to claim 1, wherein the buffer layer is an epoxy resin layer, an acrylate adhesive layer or a modified polyurethane adhesive layer.
6. The lightweight thin ceramic-glass composite case for a mobile terminal according to claim 1, wherein the thickness of the non-metal composite material layer is less than or equal to 0.5mm, the thickness of the ceramic layer or the glass layer is less than or equal to 1.0mm, and the thickness of the buffer layer is 50-80 μm.
7. The thin and light ceramic-glass composite case for a mobile terminal according to claim 2, wherein the thickness of the ceramic layer or the glass layer is 0.2-0.45 mm and the thickness of the non-metal composite layer is 0.1-0.3 mm at the rear cover of the backplate.
8. The lightweight thin ceramic-glass composite case for a mobile terminal as claimed in claim 2, wherein the maximum thickness of the rear cover of the backplate is 0.3-0.45 mm.
9. The lightweight thin ceramic-glass composite case for a mobile terminal according to claim 2, wherein the thickness difference between any two points of the rear cover of the backplate is less than or equal to 0.1mm, and the thickness of the rear cover of the backplate is 0.25-0.9 mm; the thickness difference of any two points of the back plate back cover is larger than 0.1mm, and the thickness of the back plate back cover is 0.3-0.45 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922495247.6U CN212097797U (en) | 2019-12-31 | 2019-12-31 | Ceramic and glass composite shell for mobile terminal to be light and thin |
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| CN201922495247.6U CN212097797U (en) | 2019-12-31 | 2019-12-31 | Ceramic and glass composite shell for mobile terminal to be light and thin |
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| CN212097797U true CN212097797U (en) | 2020-12-08 |
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