WO2021253935A1

WO2021253935A1 - Housing assembly, preparation method therefor and mobile terminal

Info

Publication number: WO2021253935A1
Application number: PCT/CN2021/086153
Authority: WO
Inventors: 高志伟
Original assignee: Oppo广东移动通信有限公司
Priority date: 2020-06-15
Filing date: 2021-04-09
Publication date: 2021-12-23
Also published as: CN113800776B; CN113800776A

Abstract

A housing assembly, a preparation method therefor and a mobile terminal, the housing assembly comprising a glass body, the glass body having a first surface, and the first surface having a haze of less than or equal to 90% and a surface roughness Ra of greater than or equal to 3 microns. The mobile terminal contains the glass body.

Description

Shell assembly and preparation method thereof and mobile terminal

Technical field

This application relates to the technical field of mobile terminals, and in particular, to a housing assembly and a preparation method thereof, and a mobile terminal.

Background technique

With the gradual popularization of 5G technology, more and more glass housings are used in the field of mobile terminal (such as smart phones) shells. At the same time, as users have higher and higher requirements for the appearance of mobile terminals, the appearance of mobile terminal shells is decorated The methods are becoming more and more diverse, one of which is the anti-glare (AG) effect. Although the current AG glass will form a matte effect similar to frosted glass, it has poor fingerprint resistance, and the product is slippery. It is easy to hold the product and cause the product to fall, or the transmittance loses too much, and the appearance and decoration are lost. Degrees of freedom.

Therefore, the current mobile terminal housing related technology still needs to be improved.

Application content

This application aims to solve one of the technical problems in the related technology at least to a certain extent. To this end, an objective of the present application is to provide a housing assembly capable of having both low haze and large roughness, a manufacturing method thereof, and a mobile terminal.

In one aspect of the present application, the present application provides a housing assembly. According to an embodiment of the present application, the housing assembly includes: a glass body having a first surface, the haze of the first surface is less than or equal to 90%, and the surface roughness Ra is greater than or equal to 3 microns. The housing assembly not only has a good anti-glare function in optical performance, but also has a sufficiently low haze for decoration, but also has a very large surface roughness, which can greatly improve the effect of fingerprint resistance and has additional The special effect of anti-slip hand anti-dropping.

In another aspect of the present application, the present application provides a method of preparing a housing assembly. According to an embodiment of the present application, the method includes: sandblasting at least part of the surface of the glass body, and the roughness of the surface of the glass body after the sandblasting is greater than or equal to 0.8 microns; The surface of the glass body after the sand treatment is etched, and the surface of the glass body after the etching constitutes a first surface. The surface roughness Ra of the first surface is greater than or equal to 3 microns, and the haze is less than or equal to 90%. The method can quickly and simply prepare a shell assembly with both large roughness and low haze. The steps are simple, easy to operate, and easy for industrial production. The obtained shell assembly has better decorative effects while preventing glare. , And has a good anti-fingerprint function and non-slip hand function, users can not only enjoy the beautiful appearance, but also have a better sense of hand.

In another aspect of this application, this application provides a mobile terminal. According to an embodiment of the present application, the mobile terminal includes: the housing assembly described above, the housing assembly defining an accommodating space; and a display screen, the display screen being arranged in the accommodating space. The mobile terminal has both anti-glare, non-slip hand anti-dropping and beautiful appearance effects at the same time, and the user experience is better.

Description of the drawings

Fig. 1 is an optical microscope photograph of a housing assembly according to an embodiment of the present application.

Fig. 2 is a schematic flowchart of a method for preparing a housing assembly according to an embodiment of the present application.

Fig. 3 is a schematic flow chart of a method for preparing a housing assembly according to an embodiment of the present application.

Fig. 4 is a schematic flowchart of a method for preparing a housing assembly according to another embodiment of the present application.

Fig. 5 is a schematic flow chart of a method for preparing a housing assembly according to another embodiment of the present application.

6 is an optical microscope photograph of the surface of the glass body of Example 1 and Comparative Example 2 of the present application.

FIG. 7 is the size distribution result of the convex structure on the surface of the glass body of Example 1 and Comparative Example 2 of the present application.

Fig. 8 is an appearance effect diagram of the surface of the glass body of Example 1 of the present application.

Fig. 9 is an appearance effect diagram of the surface of the glass body of Comparative Example 2 of the present application.

Fig. 10 is a schematic diagram showing the gradual change of the realizing parameters of the first surface of the glass body in different directions according to an embodiment of the present application.

FIG. 11 is a schematic diagram of the gradually changing size, shape, and density of multiple gradual regions on the first surface of the glass body according to an embodiment of the present application.

Fig. 12 is a schematic diagram of a shielding plate moving in the same direction during a sandblasting process according to an embodiment of the present application.

FIG. 13 is a schematic diagram of two shielding plates moving in opposite directions during a sandblasting process according to an embodiment of the present application.

14 is a schematic diagram of the gradual change effect of the glass body obtained by moving the two shielding plates in the opposite direction during the sandblasting process according to an embodiment of the present application.

15 is a schematic diagram of a shielding plate having a circular through hole in an embodiment of the present application, and the shielding plate gradually moves away from the glass body during the sandblasting process.

FIG. 16 is a schematic diagram of the gradual effect of the surface of the glass body obtained by moving the shielding plate gradually away from the glass body during the sandblasting process.

FIG. 17 is a schematic diagram of the gradual effect of the surface of the glass body obtained by moving the shielding plate gradually away from the glass body during the sandblasting process with a rectangular through hole on a shielding plate according to an embodiment of the present application.

FIG. 18 is a schematic flowchart of a method for preparing a housing assembly according to another embodiment of the present application.

19 is a schematic diagram of the nozzle gradually moving away from the glass body during the sandblasting process of an embodiment of the present application and moving in a straight direction in a direction parallel to the surface of the glass body to be sandblasted.

FIG. 20 is a schematic diagram of the gradual change effect of the glass body obtained by moving the nozzle gradually away from the glass body during the sandblasting process and moving along the zigzag track in a direction parallel to the surface of the glass body to be sandblasted during the sandblasting process of an embodiment of the present application.

FIG. 21 is a schematic flowchart of a method for preparing a housing assembly according to another embodiment of the present application.

FIG. 22 is a schematic diagram of achieving a gradation effect through yellow light etching masking ink according to an embodiment of the present application.

FIG. 23 is a schematic diagram of the size, shape, and density of the gradient area according to an embodiment of the present application to achieve different gradient effects.

FIG. 24 is a schematic diagram of achieving a gradual change effect by masking ink through silk screen printing according to an embodiment of the present application.

Figure 25 is a micrograph of the surface of the glass body obtained in Example 6 of the present application.

detailed description

The embodiments of the present application are described in detail below. The embodiments described below are exemplary, and are only used to explain the present application, and cannot be understood as a limitation to the present application. Where specific techniques or conditions are not indicated in the examples, the procedures shall be carried out in accordance with the techniques or conditions described in the literature in the field or in accordance with the product specification. The reagents or instruments used without the manufacturer's indication are all conventional products that can be purchased commercially.

It can be understood that the specific type of the glass body is not particularly limited, and can be any known type of glass, specifically silicate glass, phosphate glass, borate glass, etc., which can be flexibly selected according to actual applications.

Specifically, the haze of the first surface can be less than or equal to 90%, specifically can be less than or equal to 87%, further can be less than or equal to 85%, etc., more specifically, it can be 50% to 85%, for example, it can be specifically 90%, 89%. %, 88%, 87%, 86%, 85%, 84%, 83%, 82%, 81%, 80%, 70%, 60%, 50%, etc. Within this haze range, the housing component still maintains a relatively high transmittance, and various appearance decorations can be performed on it to achieve rich and beautiful appearance effects.

Specifically, the surface roughness Ra of the first surface may be greater than or equal to 3 micrometers, specifically may be greater than or equal to 5 micrometers, further may be greater than or equal to 7 micrometers, etc., specifically may be 3-15 micrometers, for example, specifically may be 3 micrometers, 4 microns, 5 microns, 6 microns, 7 microns, 8 microns, 9 microns, 10 microns, 11 microns, 12 microns, 13 microns, 14 microns, 15 microns, etc. Within this roughness range, it can have better anti-fingerprint performance and non-slip hand anti-dropping function, and can give users a special grip feeling.

Specifically, a housing assembly that satisfies the above-mentioned haze and roughness has an irregular convex structure with a size greater than 50 microns on the first surface (refer to FIG. 1). The surface of the above-mentioned irregular convex structure can reflect light in all directions, reduce specular reflection, and achieve a good anti-glare effect. At the same time, the reflection phenomenon of each of the above-mentioned convex structures can also make the first surface have a good anti-glare effect. At the same time, it achieves a special flashing appearance effect similar to sand, and can effectively ensure that it has both a lower haze and a larger roughness at the same time. In some specific embodiments, the proportion of the size distribution of the irregular protrusion structure in the range of 82-222 microns is not less than 20% (specifically, 20%, 25%, 30%, 35%, 40%, 41%). , 42%, 43%, 44%, 45%, etc.). In some other specific embodiments, the proportion of the size distribution of the irregular protrusion structure in the range of 117-187 microns is not less than 15% (specifically, 15%, 18%, 20%, 22%, 24%, 25%). %, 26%, 27%, 28%, 29%, 30%, etc.). Within this size distribution range, while having both low haze and high roughness, the shell assembly can have a special flashing appearance effect similar to sand, which improves the aesthetics.

In some specific embodiments, the aforementioned irregular convex structure may be an irregular partial spherical convex structure. Specifically, the aforementioned irregular partial spherical convex structure should be understood in a broad sense. Specifically, the irregular partial spherical convex structure Take the case of a sphere obtained by approximately cutting a sphere with a surface as an example. The cutting surface can be circular or irregular, and its arc surface can be completely overlapped with the spherical surface, or there can be a certain deviation, irregular part When the spherical convex structure approximates a part of the sphere obtained by cutting the sphere with multiple surfaces, it is similar to the above-mentioned approximate spherical absence, and will not be described in detail here. In addition, the "dimension of the irregular convex structure" herein refers to the maximum value of the distance between any two points on the contour line of the irregular convex structure.

Specifically, on the first surface, the irregular part of the spherical convex structure may be continuously distributed, or may be distributed at intervals. In some specific embodiments, the distribution density of the irregular part of the spherical convex structure can be adjusted according to actual needs, which will not be repeated here.

It can be understood that the 20-degree gloss of the first surface may be 1-10, such as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, etc. When the gloss is within this range, the appearance effect of the housing assembly is better.

Specifically, the first surface of the housing assembly of the present application can also achieve a gradual appearance effect, where the gradual appearance effect can be a gradation of surface roughness, haze, and gloss, or it can be the size and shape of the figure. And the gradual change of density, etc. It can be understood that the first surface may include a gradual area. In some specific embodiments, in at least one first predetermined direction, at least one parameter of the gradual area gradually changes, and the parameter includes surface roughness, haze, and At least one of the glossiness; in other embodiments, the number of the gradient area is multiple, and in at least one second predetermined direction, at least one of the size, shape, and density of the gradient area gradually changes In some specific embodiments, the number of the gradient area is multiple, at least one parameter of the gradient area gradually changes in at least one first predetermined direction, and at the same time in at least one second predetermined direction, so At least one of the size, shape, and density of the gradient area gradually changes.

Specifically, the gradual range of the above parameters can be selected according to actual needs. For example, the surface roughness can be gradually changed from 3 microns to 15 microns, the haze can be gradually changed from 50% to 90%, and the gloss at a 20 degree angle can be between 1 and 10 changes gradually, of course, it can also be changed in a larger or smaller range, for example, the surface roughness can be gradually changed from 5 microns to 10 microns, the haze can be gradually changed from 60% to 80%, and the gloss at a 20 degree angle It can be gradually changed from 2 to 8 and so on. The size, shape and density of the gradient area can also be selected according to actual needs. For example, the size of the gradient area can be a few millimeters, ten millimeters, tens of millimeters, etc., and the shape of the gradient area can be a circle, a rectangle, or a diamond. Or other regular and irregular graphics, and the density of the gradient area can be one, a few, a dozen, dozens, etc. distributed in a unit area. This application does not impose special restrictions on this.

It should be noted that the above-mentioned "gradual change" is not particularly limited. It can be gradually larger, gradually smaller, first larger and then smaller, first smaller and then larger, etc. The specific change trend can be selected according to actual needs . In addition, the first predetermined direction and the second predetermined direction can be any direction, and can be bidirectional or multiple directions. At the same time, the first predetermined direction and the second predetermined direction can be the same or different, such as the first predetermined direction and the second predetermined direction. The direction can be the length direction of the glass body; or the first predetermined direction is the length direction of the glass body, and the second predetermined direction is the width direction of the glass body; or the first predetermined direction is the length direction and the width direction of the glass body, and The second predetermined direction is the diagonal direction of the glass body and so on. Specifically, FIG. 10 shows a schematic diagram of gradually changing parameters in different first predetermined directions, and FIG. 11 shows a schematic diagram of gradually changing the size, shape, and density of multiple gradient regions.

Further, there may be one or multiple gradation areas. When there is one gradation area, the gradation area may be the entire first surface, part of the first surface, etc., of the glass body. In a specific embodiment, the gradation area is part of the The first surface, at this time, the ratio of the area of the gradual change area to the area of the first surface is not less than 10%, and specifically may not be less than 20%, for example, it may be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, etc. It can be understood that the above-mentioned parameters in the gradual zone change slowly from large to small or from small to large at this time, without sudden change.

Specifically, in the gradual change area, the ratio of the maximum value of the parameter to the minimum value of the parameter is greater than or equal to 1.5, specifically may be greater than or equal to 2, greater than or equal to 5, or greater than or equal to 10, for example, may be 1.5, 2. , 3, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 10.5, 11, etc. As a result, it is possible to provide users with stronger perception power.

It can be understood that the above-mentioned housing assembly may be composed of a glass body formed with a first surface, or may also contain other structures and components (such as at least one of a metal member and a plastic member, etc.). Specifically, the foregoing glass body may be composed of The back plate, and the metal or plastic components constitute the middle frame and so on. In addition, the size and shape of the housing component are not particularly limited, and can be flexibly designed and adjusted according to the actual mobile terminal requirements. Specifically, it can be a 2D structure, a 2.5D structure, or a 3D structure. When the housing component is a 2.5D structure or a 3D structure, In the structure, the glass body can be processed by hot bending, welding, etc. Wherein, the area covered by the first surface on the glass body can be adjusted as required. Generally, the first surface is located on the outer surface of the housing assembly (the surface facing the user in actual use, and the inner surface facing the interior of the mobile terminal). Only part of the outer surface can be the first surface, or all of the outer surface can be the first surface, and the part that forms the predetermined pattern can be formed as the first surface according to the design requirements, so that the housing assembly has a special appearance and beautiful appearance. Pattern effect.

In another aspect of the present application, the present application provides a method of preparing a housing assembly. According to an embodiment of the present application, referring to FIG. 2, the method includes: sandblasting at least part of the surface of the glass body, and the roughness of the surface of the glass body after the sandblasting is greater than or equal to 0.8 microns; The surface of the glass body after the sandblasting treatment is etched, the surface of the glass body after the etching constitutes a first surface, and the surface roughness Ra of the first surface is greater than or equal to 3 microns, and The haze is less than or equal to 90%. The method can quickly and easily prepare shell components with both large roughness and low haze. The steps are simple, easy to operate, and easy for industrial production. Sandblasting and etching are coordinated with each other, so that the resulting shell components have low fog at the same time. It has a better decorative effect while preventing glare and has a good anti-fingerprint function and anti-slip hand function. Users can not only enjoy the beautiful appearance, but also have a better grip. Feel.

Specifically, the glass body that can be used in this method is not particularly limited, and can be flexibly selected according to the actual application environment, etc., and the specific can be the same as the glass body in the housing assembly described above, and will not be repeated here.

Specifically, in this method, before etching, sandblasting is used to make the surface of the glass body reach a higher roughness, and then an etching solution is used to etch the glass for an appropriate time to achieve the target etching effect, which can effectively obtain both The first surface with low haze and large roughness. Specifically, a better target effect can be achieved by controlling and adjusting the specific parameters of sandblasting and etching.

In some specific embodiments, the size of the sand material used in the sandblasting treatment is less than or equal to 1000 mesh, and specifically may be 60-600 mesh. For example, it can be 60 mesh, 100 mesh, 200 mesh, 300 mesh, 400 mesh, 500 mesh, 600 mesh, 700 mesh, 800 mesh, 900 mesh, 1000 mesh, etc. Within this size range, a larger roughness and a larger-sized convex structure can be formed on the surface of the glass body, which facilitates the subsequent formation of a surface morphology with anti-glare, low haze and large roughness. In some specific embodiments, the pressure of the sandblasting treatment may be 2-3Kg, such as 2Kg, 2.1Kg, 2.2Kg, 2.3Kg, 2.4Kg, 2.5Kg, 2.6Kg, 2.7Kg, 2.8Kg, 2.9Kg, 3Kg and so on. In this pressure range, the pressure will not be too high to make the glass body easy to collapse and reduce the yield, and the surface of the glass body can be well realized to meet the surface morphology of anti-glare, low haze and large roughness at the same time. . Specifically, the sand material used for sandblasting may be at least one of white corundum, brown corundum and emery. As a result, the materials are widely sourced and easily available, and the surface morphology of suitable roughness can be formed on the surface of the glass body.

In some specific embodiments, the size of the sand material used in the sandblasting treatment is 60-600 mesh, and the pressure is 2-3Kg. As a result, the size of the sand material and the sandblasting pressure can be better matched with each other to form a better surface morphology on the surface of the glass body.

Specifically, the surface of the glass body needs to be etched after the sandblasting treatment. The etching can appropriately modify the surface morphology formed by the sandblasting, which can effectively increase the surface roughness while reducing the haze. Specifically, the etching solution may be hydrofluoric acid with a mass concentration of 5%, so that the hydrofluoric acid can effectively open the silicon-oxygen bond in the glass body to etch the glass. The etching time can be greater than or equal to 5 minutes, specifically 10-35 minutes, such as 5 minutes, 10 minutes, 15 minutes, 20 minutes, 25 minutes, 30 minutes, 35 minutes, and so on. It can be understood that the specific etching time can be adjusted according to the surface roughness achieved by sandblasting and the final surface roughness to be achieved. Specifically, the etching temperature may be 25±2 degrees Celsius. Under this temperature condition, it can be achieved without cooling or heating treatment, which can greatly reduce energy consumption and cost, simplify the operation steps, and achieve a suitable etching speed, that is, it will not etch too fast and it is not easy to control the glass body. The appearance will not reduce the production efficiency due to the slow etching.

In a specific embodiment of this application, 60#Al ₂ O ₃ sand material is used, and the roughness of the glass is increased by physical sandblasting on a surface of the glass body under the condition of sandblasting pressure of 2Kg, and then the roughness of the glass is increased at 25± Under the condition of 2 degrees Celsius, use HF solution with a mass concentration of 5% to etch the surface of the glass body after sandblasting for 20 minutes, continue to increase the surface roughness while reducing the haze of the glass surface, and obtain a low haze and large roughness Housing components.

It can be understood that, in some embodiments, after the above-mentioned sandblasting and etching treatments of this method, a first surface can be formed on the glass body. The characteristics and advantages of the first surface can be compared with the first surface on the sandstone glass described above. They are consistent, so I won’t repeat them here.

In some specific embodiments, referring to FIG. 3, the above-mentioned method of preparing a housing assembly may include the following steps: cutting/slicing the original glass sheet to obtain a glass body, CNC opening a hole on the glass body (ie CNC1), and then Perform 3D hot bending, and then use ink spraying to protect the surface that does not need to form a sandstone effect, then perform the above-mentioned sandblasting to form a large rough appearance on the glass surface, and then etch to form the desired appearance effect and achieve passivation defects Improve the effect of strength, and then optimize the shape of the glass body through CNC processing (ie CNC2+CNC3, where CNC2 reams the hole position opened by CNC1, and CNC3 refines the outer contour of the glass body), and then proceed in sequence Surface polishing, chemical strengthening (a compressive stress layer is formed on the surface of the glass through ion exchange to achieve the effect of increasing the strength of the glass) and decoration (the glass body is decorated by means of filming, spraying ink, etc.).

In other specific embodiments, referring to FIG. 4, the above-mentioned method for preparing a housing assembly may include the following steps: the original glass sheet is cut/sliced to obtain a glass body, CNC opens a hole on the glass body (ie CNC1), and then First perform the above sandblasting, then perform 3D hot bending, then use ink spray to protect the surface that does not require etching effect, and then perform the above etching, and then optimize the glass body shape through CNC (ie CNC2+CNC3), and then perform surface polishing, Chemical strengthening and decoration steps.

In still other specific embodiments, referring to FIG. 5, the above-mentioned method of preparing a housing assembly may include the following steps: the original glass sheet is cut/sliced to obtain the glass body, the CNC opens a hole on the glass body (ie CNC1), and then Perform the above-mentioned sandblasting first, then perform 3D hot bending, then use ink spray to protect the surface that does not require etching effect, once again CNC processing (ie CNC2), then perform the above-mentioned etching, and then perform secondary CNC processing (ie CNC3), and then The steps of surface polishing, chemical strengthening and decoration are carried out in sequence.

As mentioned above, the first surface of the housing assembly can achieve a gradual appearance effect. Specifically, the gradual effect can be achieved in the sandblasting step, the gradual effect can also be achieved in the etching step, or the sandblasting process Together with etching to achieve a gradual effect.

In some embodiments, the gradual effect is achieved by sandblasting. Specifically, in some specific embodiments, in the sandblasting step, before the sandblasting is started, at least one shielding plate is used to shield at least part of the surface to be sandblasted of the glass body, and the shielding plate During the sandblasting process, it moves in a first predetermined manner. Specifically, before starting the sandblasting process, the shielding plate can block part of the surface to be sandblasted or all the surface to be sandblasted, and then start the sandblasting process. During the sandblasting process, move the shielding plate in a predetermined manner. The surface to be blasted that is blocked by the shielding baffle is subjected to sandblasting treatment, while the surface to be blasted that is shielded by the shielding baffle cannot be blasted, so that the movement of the shielding baffle makes the blasting time different at different positions on the surface to be blasted. , Forming a gradual effect.

Specifically, the moving speed of the shielding plate can be selected according to actual needs. In some specific embodiments, the moving speed of the shielding plate can be set in the range of 0.01 mm/s-10 mm/s. Specific such as 0.01mm/s, 0.05mm/s, 0.1mm/s, 0.5mm/s, 1mm/s, 2mm/s, 3mm/s, 4mm/s, 5mm/s, 6mm/s, 7mm/s, 8mm/s, 9mm/s, 10mm/s, etc. Within this speed range, not only can a better sandblasting effect be ensured, but also a gradual change effect with stronger perception can be achieved.

It can be understood that there may be one or more shielding plates. Specifically, when there is one shielding plate, the moving direction of the shielding plate can be the length direction, the width direction of the glass body, or other directions that have a certain angle with the length direction or the width direction, and during the sandblasting process, the shielding plate It can always move in one direction, or it can change the direction of movement during the sandblasting process, such as reciprocating movement, moving in the zigzag direction, moving along an arc, etc., thus, it can be realized by different moving modes of the shielding plate. The complex and diverse gradual appearance effects further enrich the appearance of the shell components. When there are multiple shielding plates, the moving modes of different shielding plates can be the same or different. For example, multiple shielding plates can move in the same direction, move in the opposite direction, move radially from one location to the surrounding, etc., specifically multiple The moving mode of each of the shielding plates can be the same as the moving method of one shielding plate described above, and will not be repeated here. Specifically, FIG. 12 shows a schematic diagram of a shielding plate moving in the same direction during a sandblasting process, FIG. 13 shows a schematic diagram of two shielding plates moving in opposite directions during a sandblasting process, and FIG. 14 shows A schematic diagram of the gradual change effect of the glass body obtained by moving the two shielding plates in the opposite direction during the sandblasting process.

Further, at least one of the shielding plates may have a through hole, the sandblasted sand material is sprayed onto the surface of the glass body through the through hole, and the shielding plate is in the sandblasting process. Move in the second predetermined way. Specifically, the size, shape, and number of the through holes in the shielding plate can be selected according to needs. For example, the radial size of the through holes can be several millimeters, ten millimeters, tens of millimeters, several centimeters, etc., and the shape can be Circle, rectangle, diamond, triangle or other regular and irregular shapes, the number can be one, several, etc. The moving manner of the shielding plate may be gradually approaching the glass body, gradually moving away from the glass body, moving in a direction parallel to the surface to be sandblasted while gradually approaching or away from the glass body, and so on. Specifically, FIG. 15 shows a schematic diagram of a shielding plate having a circular through hole, and the shielding plate gradually moves away from the glass body during the sandblasting process, and FIG. 16 shows a schematic diagram of a shielding plate having a circular through hole. And during the sandblasting process, the gradation effect of the surface of the glass body is obtained by gradually moving the shielding plate away from the glass body. Figure 17 shows a shielding plate with a rectangular through hole, and the shielding plate gradually moves away from the glass during the sandblasting process. A schematic diagram of the gradual change on the surface of the glass body obtained by the movement of the body.

Specifically, this method can move the shielding baffle to the left and right, front and back, up and down, or even rotating or splitting in the middle, and physical sandblasting can make the sandblasting degree of different areas of the glass body surface different, and finally make the glass surface front and back, left and right. , Oblique, or from the middle to the surrounding from heavy to lighter, simple and convenient operation, and more complex and diversified gradual effects can be achieved through the combination of the shape, number, and movement of the baffle.

In a specific embodiment, referring to FIG. 18, the method may include: the original glass sheet is cut/sliced, CNC hole position, 3D hot bending, and then ink spraying is used to protect the surface that does not require sandblasting, and then masked by a shielding baffle Sandblasting, then etching (that is, AG, etching the glass surface with a chemical solution to form the required appearance effect and achieve the effect of passivating defects to increase the strength), and then optimize the morphology through CNC (CNC2 and CNC3), followed by surface polishing, Chemical strengthening and decoration.

In other embodiments, the gradual change effect can be achieved by changing the moving speed and moving direction of the spray gun during the sandblasting process. Specifically, in the sandblasting step, according to a predetermined sandblasting path, at least one of the moving speed and the moving direction of the blasting gun is gradually changed. Specifically, in this method, by moving the sandblasting nozzle, the sandblasting time can be controlled to control the glass surface roughness, haze, and glossiness to achieve a gradual change. The specific nozzle moving speed is slow and the nozzle passes through the area multiple times. The blasting time is long, on the contrary, the blasting time is short, so that different areas can be controlled by the movement of the nozzle to achieve a gradual effect. Specifically, the movement speed of the nozzle can be 0.01mm/s-3mm/s, such as 0.01mm/s, 0.05mm/s, 0.1mm/s, 0.5mm/s, 1mm/s, 2mm/s, 3mm/s s etc. Specifically, FIG. 19 shows a schematic diagram of the nozzle gradually moving away from the glass body during the sandblasting process and moving in a linear direction in a direction parallel to the surface of the glass body to be sandblasted, and FIG. 20 shows the nozzle gradually moving away from the glass body during the sandblasting process. The glass body is a schematic diagram of the gradual change effect of the glass body obtained by moving along the zigzag track in a direction parallel to the surface of the glass body to be sandblasted.

In a specific embodiment, referring to FIG. 21, the method may include: the original glass sheet is cut/sliced, CNC1 hole position, 3D hot bending, and ink spraying is used to protect the surface of the glass body that does not require sandblasting, and then pass Moving sandblasting (at least one of the moving speed and moving direction of the nozzle gradually changes), etching again, and then optimizing the shape through CNC (CNC2 and CNC3), and then sequentially performing surface polishing, chemical strengthening and decoration.

In other embodiments, the gradual effect can be achieved by etching. In some specific embodiments, in the etching step, the glass body is gradually immersed in the etching solution from one end to the other end or gradually pulled out of the etching solution. Specifically, the glass body can be pulled up and down by the equipment to make the glass body have different reaction degrees with the etching solution in the up and down, left and right or diagonal directions, so that the parameters on the surface of the glass body are gradually changed to achieve a gradual effect. Specifically, according to the required gradual effect, the speed of pulling or immersion can be 0.01mm/s-1mm/s, such as 0.01mm/s, 0.02mm/s, 0.05mm/s, 0.08mm/s, 0.1mm /s, 0.2mm/s, 0.5mm/s, 0.8mm/s, 1mm/s, etc. Furthermore, the glass body placement frame can be designed to adjust the placement direction of the glass body, so as to realize the 360° omnidirectional placement of the glass body, gradual changes in different directions, and different gradual effects can be achieved (for a schematic diagram of gradual effects, please refer to Figure 10) .

In a specific embodiment, the method may include: the white glass is sequentially sliced, drilled, refined, side polished, 3D hot bending, polished, and then the surface of the glass body that does not need to be etched is protected by ink, and then cleaned (Clean the glass surface with chemical reagents such as water, acid, etc.), pulling and etching (etching the glass surface with chemical water, according to needs, it can be placed horizontally, vertically or obliquely, the equipment is slowly lifted upwards, and the lifting speed can be adjusted according to the design ), ink removal, chemical polishing, chemical strengthening and decoration.

In other specific embodiments, the gradual effect formed by etching can also be achieved by masking the ink. Specifically, in the etching step, before performing the etching, a masking ink layer may be formed on the surface of the glass body after the sandblasting treatment, and the masking ink layer has a plurality of openings. In at least one second predetermined direction, at least one of the size, shape, and density of the plurality of openings gradually changes. According to the design of the pattern, this method can achieve very complex gradient patterns.

In some specific embodiments, in this method, UV curable ink can be coated on the surface of the glass body, and the surface of the glass body can be applied by yellow light (mask (mask) or LDI (laser direct imaging)) according to the design. The UV curable ink is gradually changed, and then the glass body is etched to achieve the gradual effect. The main process is spraying-leveling-surface drying-exposure according to the gradual design drawing-development-UV curing-solid baking-etching-ink removal, Finally, a gradation effect is formed on the surface of the glass body. Refer to FIG. 22 for a schematic diagram of the specific process, and refer to FIG. 23 for a schematic diagram of different gradation effects obtained by this method.

In a specific embodiment, the method may include: the white glass is sequentially sliced, opened, refined, side polished, 3D hot bent, polished, and then the surface of the glass body that does not need to be etched is protected by ink, and then cleaned ( Clean the glass surface with water, acid and other chemical reagents), and then sequentially perform yellow light etching (curing the required ink on the glass surface through exposure and development to form a gradual pattern, and then etching. At this time, the glass and the glass are not covered by the ink. The etching potion reacts to form a gradient), ink removal, chemical polishing, chemical strengthening and decoration.

In other specific embodiments, in this method, the masking ink may be formed by a silk screen method. Specifically, UV curable ink or thermosetting ink can be screen printed on the surface of the glass body through a gradual screen, and then cured to change the ink on the surface of the glass body, and then the glass is etched to achieve the gradual effect. The main process is based on the gradual design. Drawing design screen-screen printing-UV curing / solid baking-etching-ink removal, and finally make the surface of the glass body form a gradual effect, the specific process schematic diagram refer to Figure 24.

In a specific embodiment, the method may include: the white glass is sequentially sliced, drilled, refined, side polished, 3D hot bent, polished, and then the surface of the glass body that does not need to be etched is protected by ink, and then cleaned ( Clean the glass surface with water, acid and other chemical reagents), and then perform silk screen mask etching (UV curable ink or thermosetting ink is screen printed on the surface of the glass body through a gradient screen, and then cured. The ink on the surface of the glass body will have a gradual effect. Then the glass body is etched. At this time, the glass body that is not covered by the ink reacts with the etching solution to form a gradual effect), ink removal, chemical polishing, chemical strengthening and decoration.

In another aspect of this application, this application provides a mobile terminal. According to an embodiment of the present application, the mobile terminal includes: the aforementioned housing assembly, the housing assembly defining an accommodating space; and a display screen, the display screen being arranged in the accommodating space. The mobile terminal has both anti-glare, non-slip hand anti-dropping and beautiful appearance effects at the same time, and the user experience is better.

It can be understood that the specific type of the mobile terminal is not particularly limited. It can be a mobile phone, a tablet computer, a game console, a wearable device, etc., and in addition to the aforementioned housing and display screen, the mobile terminal can also include conventional mobile devices. The necessary structures and components of the terminal, taking a mobile phone as an example, may also include a battery, a motherboard, a memory, a touch module, a fingerprint recognition module, a camera module, etc., which will not be repeated here.

The embodiments of the present application are described in detail below.

The examples and comparative examples described below are all carried out in accordance with the following steps:

The _{surface of the glass body is sandblasted with Al 2} O ₃ sand material, and then the surface of the glass body after sandblasting is etched with HF etching solution to obtain the shell assembly, the specific process parameters in the embodiment and the comparative example The test results are shown in the following table. The optical microscope photos of the first surface of the housing assembly of Example 1 and Comparative Example 2 are shown in Figure 6 (where a and b are photos of the first surface in Example 1 with different magnifications, c And d are photos of different magnifications on the surface of the glass body in Comparative Example 2), the size distribution results of the irregular convex structure on the surface of the glass body in Example 1 and Comparative Example 2 are shown in Figure 7. The glass body of Example 1 The appearance effect of the surface is shown in Fig. 8, and the appearance effect of the surface of the glass body of Comparative Example 2 is shown in Fig. 9.

Among them, Haze represents haze.

Anti-slip and anti-dropping effect test: using slopes with different surfaces, place the first surface of the housing component on the slope facing the slope, and then continuously increase the angle of the slope until the glass starts to fall. The test results are shown in the table below.

It can be clearly seen that on the slope surface of different materials, as the roughness of the glass surface increases, the performance of preventing slippage is improved.

Example 6

The white glass is subjected to slice, hole position, finishing, side polishing, 3D hot bending, polishing and sandblasting in sequence. Then the surface of the glass body that has not been sandblasted is protected by ink, and then it is washed in sequence (water, acid Cleaning the glass surface with other chemical reagents), slow pulling and etching (the glass body is placed longitudinally, the device starts from the end A of the glass body to slowly pull upwards, the pulling speed is 0.02mm/s-0.2mm/s programming control), ink removal, Chemical polishing (by slightly etching with acid or alkali solution to achieve the effect of passivating defects to increase strength), chemical strengthening (through ion exchange to form a compressive stress layer on the glass surface to achieve the effect of increasing the strength of the glass).

The shell assembly obtained through microscope observation, the size of the glass body is about 160mmx70mm, and its gradual change area accounts for about 90% of the first surface area. After surface roughness, 20 degree gloss and haze, the glass body is in the longitudinal direction From the A end to the B end, the haze and surface roughness gradually increase, and the gloss gradually decreases. Figure 25 (a, b, and c are the microscope photos at 60mm, 100mm and 140mm from the A end, respectively) shows The micrographs at different positions at different distances from the end A, it can be seen from the micrographs that the density of irregular protrusions on the surface of the glass body gradually changes from sparse to dense.

In the description of this specification, descriptions with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean specific features described in conjunction with the embodiment or example , The structure, materials, or characteristics are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above-mentioned terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

Although the embodiments of the present application have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present application. A person of ordinary skill in the art can comment on the foregoing within the scope of the present application. The embodiment undergoes changes, modifications, substitutions, and modifications.

Claims

A housing assembly, characterized in that it comprises:

The glass body has a first surface, the haze of the first surface is less than or equal to 90%, and the surface roughness Ra is greater than or equal to 3 microns.
The housing assembly of claim 1, wherein the first surface has irregular convex structures with a size greater than 50 microns.
The housing assembly according to claim 1, wherein the size distribution of the irregular convex structure satisfies at least one of the following conditions:

The proportion of the size distribution of the irregular convex structure in the range of 82-222 microns is not less than 20%;

The proportion of the size distribution of the irregular convex structure in the range of 117-187 microns is not less than 15%.
The housing assembly according to any one of claims 1-3, wherein the first surface satisfies at least one of the following conditions:

The surface roughness Ra is greater than or equal to 5 microns;

Haze is less than or equal to 87%;

The gloss at a 20 degree angle is 1-10.
The housing assembly according to any one of claims 1-4, wherein the first surface satisfies at least one of the following conditions:

The surface roughness Ra is greater than or equal to 7 microns;

The haze is less than or equal to 85%.
The housing assembly according to any one of claims 1-5, wherein the first surface satisfies at least one of the following conditions:

The surface roughness Ra is 3-15 microns;

The haze is 50%-85%.
The housing assembly according to any one of claims 1 to 6, wherein the first surface comprises a gradual change area, and the gradual change area satisfies at least one of the following conditions:

In at least one first predetermined direction, at least one parameter of the gradient area gradually changes, and the parameter includes at least one of surface roughness, haze, and gloss;

The number of the gradient area is multiple, and in at least one second predetermined direction, at least one of the size, shape, and density of the gradient area gradually changes.
The housing assembly according to claim 7, wherein the gradual change area satisfies any one of the following conditions:

The ratio of the area of the gradual change area to the area of the first surface is not less than 10%;

The ratio of the area of the gradual change area to the area of the first surface is not less than 20%.
The housing assembly according to claim 7 or 8, wherein the gradual change area satisfies any one of the following conditions:

In the gradual change area, the ratio of the maximum value of the parameter to the minimum value of the parameter is greater than or equal to 1.5;

In the gradual change area, the ratio of the maximum value of the parameter to the minimum value of the parameter is greater than or equal to 2;

In the gradual change area, the ratio of the maximum value of the parameter to the minimum value of the parameter is greater than or equal to 5;

In the gradual change area, the ratio of the maximum value of the parameter to the minimum value of the parameter is greater than or equal to 10.
A method for preparing a housing assembly, which is characterized in that it comprises:

Sandblasting at least part of the surface of the glass body, and the roughness of the surface of the glass body after the sandblasting is greater than or equal to 0.8 microns;

The surface of the glass body after the sandblasting treatment is etched, the surface of the glass body after the etching constitutes a first surface, and the surface roughness Ra of the first surface is greater than or equal to 3 microns, And the haze is less than or equal to 90%.
The method according to claim 10, wherein the size of the sand material used in the sandblasting treatment is less than or equal to 1000 mesh.
The method according to claim 10 or 11, wherein the size of the sand material used in the sandblasting treatment is 60-600 mesh.
The method according to any one of claims 10-12, wherein the pressure of the sandblasting treatment is 2-3Kg.
The method according to any one of claims 10-13, wherein the etching satisfies at least one of the following conditions:

The etching solution is hydrofluoric acid with a mass concentration of 5%;

The etching time is greater than or equal to 5 minutes;

The etching temperature is 25±2 degrees Celsius.
The method according to any one of claims 10-14, wherein the etching time of the etching is 10-35 minutes.
The method according to any one of claims 10-15, wherein at least one of the following conditions is met:

In the sandblasting step, before the sandblasting process starts, at least one shielding plate is used to shield at least part of the surface to be sandblasted of the glass body, and the shielding plate is in accordance with the first step during the sandblasting process. Move in a predetermined way;

In the sandblasting step, according to a predetermined sandblasting path, the moving speed of the spray gun for sandblasting is gradually changed;

In the etching step, the glass body is gradually immersed in the etching solution from one end to the other end or is gradually pulled out of the etching solution;

In the etching step, before the etching is performed, a masking ink layer is formed on the surface of the glass body after the sandblasting process, and the masking ink layer has a plurality of openings, and the masking ink layer has a plurality of openings in at least one second predetermined In the direction, at least one of the size, shape, and density of the plurality of openings gradually changes.
The method according to claim 16, wherein at least one of the shielding plates has a through hole, the sandblasted sand material is sprayed onto the surface of the glass body through the through hole, and the The shielding plate moves in the second predetermined manner during the sandblasting process.
The method according to claim 16 or 17, wherein at least one of the following conditions is met:

The moving speed of the shielding plate is 0.01mm/s-10mm/s;

The moving speed of the spray gun is 0.01mm/s-3mm/s;

The speed of the pulling or immersion is 0.01 mm/s-1 mm/s.
The method according to any one of claims 10-17, wherein the first surface is as defined in any one of claims 2-9.
A mobile terminal, characterized in that it comprises:

The housing assembly according to any one of claims 1-9, the housing assembly defining an accommodation space;

A display screen, the display screen is arranged in the accommodating space.