Shell, preparation method thereof and electronic equipment

Abstract

The invention provides a shell, a preparation method thereof and electronic equipment. The preparation method comprises the following steps: providing a base material, wherein the base material is provided with a preset surface; a partial area on the preset surface of the base material is thinned, an intermediate-state product is obtained, the intermediate-state product comprises a first part and a second part which are connected, the first part is provided with a first to-be-machined face, the second part is arranged on the first to-be-machined face of the first part in a protruding mode, and the first to-be-machined face is provided with a second to-be-machined face; the second part is provided with a second to-be-machined surface and a third to-be-machined surface which are connected in a bent mode, the second to-be-machined surface is the peripheral side face of the second part, and the third to-be-machined surface is the surface, deviating from the first part, of the second part; a protective layer is formed on a third to-be-machined face of the second part in an injection molding mode; and the first to-be-machined face and the second to-be-machined face of the intermediate-state product are polished.

Description

Technical Field

[0001] The present application relates to the field of electronics, and in particular to a housing, a preparation method thereof, and an electronic device. Background Art

[0002] With the development of technology and the improvement of living standards, people have put forward higher requirements for the appearance and visual effects of electronic devices (such as mobile phones). In order to make the battery back cover of the electronic device have a better appearance, a crater boss is usually set at the position of the back cover corresponding to the rear camera. However, the appearance effect of the existing crater boss is not ideal. Summary of the invention

[0003] The embodiment of the present application provides a method for preparing a shell, and the shell prepared by the method has a better appearance effect.

[0004] In a first aspect, an embodiment of the present application provides a method for preparing a shell, which comprises:

[0005] Providing a substrate, wherein the substrate has a predetermined surface;

[0006] Performing a thinning process on a partial area on the preset surface of the substrate to obtain an intermediate product, wherein the intermediate product includes a first portion and a second portion connected to each other, wherein the first portion has a first surface to be processed, the second portion is convexly disposed on the first surface to be processed of the first portion, the second portion has a second surface to be processed and a third surface to be processed that are connected by bending, the second surface to be processed is a peripheral side surface of the second portion, and the third surface to be processed is a surface of the second portion that is away from the first portion;

[0007] Injection molding a protective layer on the third to-be-processed surface of the second portion; and

[0008] The first to-be-processed surface and the second to-be-processed surface of the intermediate product are polished.

[0009] In a second aspect, an embodiment of the present application provides a shell, which is prepared using the shell preparation method described in the present application.

[0010] In a third aspect, an embodiment of the present application provides an electronic device, comprising:

[0011] Display screen;

[0012] The housing according to the embodiment of the present application is arranged opposite to the display screen; and

[0013] A processor is located between the housing and the display screen, and the processor is electrically connected to the display screen to control the display screen to display.

[0014] The preparation method of the housing according to the embodiment of the present application is as follows: after thinning the base material, an anti-abrasion layer is injection-molded on the third surface to be processed of the intermediate product, and then the first surface to be processed and the second surface to be processed of the intermediate product are polished. When polishing the first surface to be processed and the second surface to be processed, due to the protection of the anti-abrasion layer, the intersecting edge line between the second surface to be processed and the third surface to be processed will not be polished, so it will not be polished and collapsed, making the edge line at the intersection of the second surface and the third surface of the boss part of the prepared housing clearer and more upright, thus making the housing have a better appearance effect. In addition, when the intermediate product of the embodiment of the present application is polished with the thickness of the base material unchanged, the third surface will not be polished. Therefore, the height of the second part will not be lost during the polishing process, making the boss part of the prepared housing have a higher height, thus making the housing have a better appearance effect. Moreover, the preparation method of the housing of the present application does not require surface grinding, and the preparation cost is lower. The cost of each housing for mobile phones can be reduced by 1.5 yuan. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained according to these drawings.

[0016] Figure 1 is a schematic flow chart of the preparation method of the housing according to an embodiment of the present application.

[0017] Figure 2 is a schematic structural diagram of the preparation process of the housing according to an embodiment of the present application.

[0018] Figure 3 is a schematic flow chart of the preparation method of the housing according to another embodiment of the present application.

[0019] Figure 4 is a schematic plan view of the housing according to an embodiment of the present application.

[0020] Figure 5 is a housing according to an embodiment of the present application along Figure 4 The cross-sectional structural diagram in the A-A direction.

[0021] Figure 6 is a schematic flow chart of the preparation method of the housing according to another embodiment of the present application.

[0022] Figure 7 is a schematic flow chart of the polishing according to an embodiment of the present application.

[0023] Figure 8It is a schematic flow chart of a method for preparing a housing according to another embodiment of the present application.

[0024] Figure 9 It is a schematic flow chart of a method for preparing a housing according to another embodiment of the present application.

[0025] Figure 10 It is a schematic flow chart of a surface roughening treatment according to an embodiment of the present application.

[0026] Figure 11 It is a schematic flow chart of a method for preparing a housing according to another embodiment of the present application.

[0027] Figure 12 It is Figure 5 an enlarged view of the dashed box I in

[0028] Figure 13 It is a schematic structural diagram of an electronic device according to an embodiment of the present application.

[0029] Figure 14 It is a partial exploded structural diagram of an electronic device according to an embodiment of the present application.

[0030] Figure 15 It is a circuit block diagram of an electronic device according to an embodiment of the present application.

[0031] Explanation of reference numerals:

[0032] Substrate 10a, preset surface 11a, intermediate product 10b, first part 11b, first surface to be processed 111b, second part 12b, second surface to be processed 121b, third surface to be processed 122b, through hole 13b, protective layer 20a, housing 200, body part 210, first surface 211, boss part 220, second surface 221, third surface 222, mounting hole 230, electronic device 300, display screen 310, processor 330, memory 350, middle frame 320, camera module 370. Detailed implementation manners

[0033] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0034] In the description and claims of this application and the above-mentioned drawings, terms such as "first", "second", etc. are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0035] Next, the technical solutions in the embodiments of this application will be described with reference to the drawings.

[0036] It should be noted that for ease of description, in the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, in different embodiments, the detailed description of the same components is omitted.

[0037] With the development of technology and the improvement of living standards, people have put forward higher requirements for the visual appearance of electronic devices (such as mobile phones). In order to make the battery back cover of the electronic device have a better appearance effect, a crater boss is usually provided at the position of the back cover corresponding to the rear camera. However, the appearance effect of the existing crater boss is not ideal.

[0038] In the related art, the battery back cover includes a shell body and a crater boss. The crater boss protrudes from one side of the shell body. The surface of the crater boss facing away from the shell body often has a smooth transition (such as having an arc chamfer), or the design is unreasonable, resulting in the ridge line of the crater boss not being straight enough, affecting the appearance effect of the battery back cover.

[0039] Please refer to Figure 1 and Figure 2 , the embodiments of this application provide a preparation method for a housing, and the preparation method includes:

[0040] S101, providing a substrate 10a, where the substrate 10a has a preset surface 11a;

[0041] Optionally, the substrate 10a may be, but is not limited to, a glass substrate 10a. Optionally, the substrate 10a may be, but is not limited to, a 2D structure, a 3D structure, etc.

[0042] S102, perform a thinning process on a partial area of the preset surface 11a of the base material 10a to obtain an intermediate product 10b. The intermediate product 10b includes a first part 11b and a second part 12b connected to each other. The first part 11b has a first surface to be processed 111b, and the second part 12b protrudes from the first surface to be processed 111b of the first part 11b. The second part 12b has a second surface to be processed 121b and a third surface to be processed 122b that are bent and connected. The second surface to be processed 121b is the peripheral side surface of the second part 12b, and the third surface to be processed 122b is the surface of the second part 12b facing away from the first part 11b;

[0043] Optionally, the thinning process can adopt computer numerical control surface reduction (abbreviated as CNC surface reduction). When performing the thinning process, simultaneously grind the peripheral side surface of the base material 10a to make the peripheral side surface of the base material 10a smoother.

[0044] Optionally, the intermediate product 10b further has a through hole 13b that sequentially penetrates through the first part 11b and the second part 12b. Then, when performing the thinning process on the base material 10a, it further includes forming a through hole 13b that sequentially penetrates through the first part 11b and the second part 12b. When the housing is applied to an electronic device, the position of the housing corresponding to the through hole 13b is used to set components such as a camera module, a flash, a fill light, a lighting lamp, and a decorative piece of the electronic device.

[0045] Optionally, the number of through holes 13b can be one or more. When the number of through holes 13b is multiple, the multiple through holes 13b are arranged at intervals. The number of through holes 13b can be designed according to the number of components such as the camera module or the flash of the electronic device using the housing, and the present application does not make specific limitations.

[0046] It can be understood that by performing a thinning process on a partial area on the side of the preset surface 11a of the base material 10a, the obtained intermediate product 10b is a non-uniform thickness structure, that is, the thickness at the position corresponding to the second part 12b is relatively large, and the thickness at the position corresponding to the first part 11b is relatively small. It can be understood that the surface of the base material 10a facing away from the preset surface 11a is not thinned. For example, the surface of the first part 11b facing away from the second part 12b is a flat surface.

[0047] It can be understood that the first part 11b is disposed around the outer periphery of the second part 12b.

[0048] Understandably, the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b are bent and connected in sequence; that is, one end of the second surface to be processed 121b is connected to the first surface to be processed 111b, and the other end of the second surface to be processed 121b is connected to the third surface to be processed 122b.

[0049] Understandably, the first part 11b and the second part 12b are of an integral structure, the first part 11b and the second part 12b are made of the same material, there is no interface between the first part 11b and the second part 12b, and the first part 11b and the second part 12b are two different parts of the intermediate product 10b, which are only artificially divided for the convenience of description.

[0050] It should be noted that after the base material 10a is locally thinned in the thickness direction, the convex part left after thinning is the second part 12b, and the flat part below the convex part is the first part 11b.

[0051] Please refer to Figure 3 , optionally, before thinning the base material 10a, the preparation method further includes: S101’, providing a first protective ink layer on the side of the base material 10a facing away from the preset surface 11a.

[0052] Optionally, the protective ink layer can be, but is not limited to, acid and alkali resistant ink.

[0053] S103, injecting a protective layer 20a on the third surface to be processed 122b of the second part 12b; and

[0054] Optionally, the material of the protective layer 20a can be, but is not limited to, polyethylene.

[0055] Optionally, when injecting the protective layer 20a on the third surface to be processed 122b of the second part 12b, due to the injection accuracy, the protective layer 20a may cover the second surface to be processed 121b of the second part 12b or the first surface to be processed 111b of the first part 11b. In this case, only CNC is needed to remove the excess protective layer 20a.

[0056] S104, polishing the first surface to be processed 111b and the second surface to be processed 121b of the intermediate product 10b.

[0057] Optionally, through mechanical polishing, using a consumable with a relatively soft material to polish the first surface to be processed 111b and the second surface to be processed 121b of the intermediate product 10b, so as to remove the grinding wheel marks left by CNC and polish it.

[0058] It should be noted that as Figure 4 and Figure 5As shown, the intermediate product 10b finally forms the housing 200. The first part 11b forms the main body part 210, the second part 12b forms the boss part 220, the first surface to be machined 111b forms the first surface 211, the second surface to be machined 121b forms the second surface 221, the third surface to be machined 122b forms the third surface 222, and the through hole 13b forms the mounting hole 230. In other words, the obtained housing 200 includes the connected main body part 210 and the boss part 220. The main body part 210 has the first surface 211. The boss part 220 has the second surface 221 and the third surface 222 that are bent and connected. The second surface 221 is the circumferential side surface of the boss part 220. One end of the second surface 221 facing away from the third surface 222 is connected to the first surface 211. The third surface 222 is the surface of the boss part 220 facing away from the main body part 210. The housing 200 also has the mounting hole 230 that sequentially penetrates the main body part 210 and the boss part 220. The mounting hole 230 is used to mount components such as a camera module, a flash, a fill light, a lighting lamp, or a decorative part of an electronic device.

[0059] Optionally, the number of the mounting holes 230 can be one or more. When the number of the mounting holes 230 is multiple, the multiple mounting holes 230 are arranged at intervals. The number of the mounting holes 230 can be designed according to the number of components such as the camera module and the flash of the electronic device using the housing 200, and the present application does not make specific limitations.

[0060] In the related art, when preparing the housing, after the thinning treatment and before polishing, no protective layer is provided on the third surface to be machined. Therefore, when polishing, the first surface to be machined, the second surface to be machined, and the third surface to be machined will all be polished, so that the edge line where the second surface to be machined intersects with the third surface to be machined is easily polished and collapsed. In order to make the intersecting edge line between the second surface and the third surface of the boss part of the obtained housing have a better standing or straightening effect, it is necessary to use the surface grinding process to grind and straighten the collapsed boss part. The surface grinding process takes a long time (for example, 3000s to 4000s), and it is easy to scratch the first surface, the second surface, and the third surface during the surface grinding process, so that after the chemical polishing process, the defects are magnified and the yield is reduced. In addition, adding the surface grinding process will increase the tolerance of the height of the boss part, thereby increasing the process cost.

[0061] The manufacturing method of the housing 200 according to the embodiment of the present application, after thinning the substrate 10a, an anti-abrasion layer 20a is injection-molded on the third surface to be processed 122b of the intermediate product 10b, and then the first surface to be processed 111b and the second surface to be processed 121b of the intermediate product 10b are polished. When polishing the first surface to be processed and the second surface to be processed 121b, due to the protection of the anti-abrasion layer 20a, the intersection edge between the second surface to be processed 121b and the third surface to be processed 122b will not be polished, so it will not be polished and collapsed, making the edge effect at the intersection of the second surface 221 and the third surface 222 of the boss portion 220 of the manufactured housing 200 clearer and more upright, thus making the housing 200 have a better appearance effect; in addition, when the intermediate product 10b according to the embodiment of the present application is polished with the thickness of the substrate 10a remaining unchanged, the third surface 222 will not be polished, so the height of the second part 12b will not be lost during the polishing process, thus making the boss portion 220 of the manufactured housing 200 have a higher height, and thus making the housing 200 have a better appearance effect; furthermore, the manufacturing method of the housing 200 of the present application does not require surface grinding, and the manufacturing cost is lower, and the cost of each housing 200 for mobile phones can be reduced by 1.5 yuan.

[0062] Please refer to Figure 6 , in some embodiments, after thinning a partial area on the preset surface 11a of the substrate 10a to obtain the intermediate product 10b, before injection-molding the anti-abrasion layer 20a on the third surface to be processed 122b of the second part 12b (i.e., after S102 and before S103), the manufacturing method further includes:

[0063] S102’, performing a four-sided edge sweeping process (abbreviated as SPM process) on the peripheral side surface of the first part 11b.

[0064] Optionally, performing the SPM process on the four sides of the first part 11b to remove the grinding wheel marks on the peripheral side surface of the first part 11b, and polishing and brightening the four sides of the first part 11b to make the four sides of the first part 11b smoother and brighter.

[0065] In some embodiments, the outer peripheral edge of the anti-abrasion layer 20a is retracted by 0.05 mm to 0.1 mm compared with the outer peripheral edge of the second part 12b.

[0066] Specifically, the retraction dimension of the outer peripheral edge of the anti-abrasion layer 20a compared with the outer peripheral edge of the second part 12b may be but is not limited to 0.05 mm, 0.055 mm, 0.06 mm, 0.065 mm, 0.07 mm, 0.075 mm, 0.08 mm, 0.085 mm, 0.09 mm, 0.095 mm, 0.1 mm, etc.

[0067] In this embodiment, if the size by which the outer peripheral edge of the protective layer 20a is retracted compared to the outer peripheral edge of the second part 12b is too small, when polishing the first surface to be processed 111b and the second surface to be processed 121b, due to the obstructive effect of the protective layer 20a, it is easy for the second surface to be processed 121b to be partially or even completely not polished, so that the grinding wheel lines or grinding wheel marks remaining on the second surface to be processed 121b during the thinning process cannot be completely removed, resulting in defects on the second surface 221 of the manufactured housing 200 and reducing the manufacturing yield of the housing 200. In addition, when the grinding wheel lines or grinding wheel marks on the second surface to be processed are not completely removed, when anti-glare treatment (Anti-glare Glass, abbreviated as AG, also known as sandblasting treatment) is performed on the first surface to be processed 111b, the second surface to be processed 121b and the third surface to be processed 122b, after the anti-glare treatment, the defects at the positions of the grinding wheel lines or grinding wheel marks will be further magnified, forming white grinding wheel lines at the positions of the grinding wheel lines or grinding wheel marks, resulting in poor appearance and further reducing the manufacturing yield of the housing 200. If the size by which the outer peripheral edge of the protective layer 20a is retracted compared to the outer peripheral edge of the second part 12b is too large, when polishing the first surface to be processed 111b and the second surface to be processed 121b, it is easy to polish the ridge line at the intersection of the second surface to be processed 121b and the third surface to be processed 122b, thereby reducing the stiffness of the ridge line at the intersection of the second surface to be processed 121b and the third surface to be processed 122b and reducing the appearance effect of the boss portion 220 of the manufactured housing 200.

[0068] In some embodiments, the thickness of the protective layer 20a ranges from 0.9 mm to 1.1 mm.

[0069] Specifically, the thickness of the protective layer 20a can be, but is not limited to, 0.9 mm, 0.92 mm, 0.944 mm, 0.96 mm, 0.98 mm, 1.0 mm, 1.02 mm, 1.044 mm, 1.06 mm, 1.08 mm, 1.1 mm, etc.

[0070] In this embodiment, if the thickness of the protective layer 20a is too thin, the polishing resistance life of the protective layer 20a is reduced. When polishing, the edge of the third surface to be processed 122b is easily polished, so that the ridge line between the second surface to be processed 121b and the third surface to be processed is polished and collapsed, reducing the appearance effect of the boss portion 220 of the manufactured housing 200. If the thickness of the protective layer 20a is too thick, when polishing, the contact force between the brush of the polishing equipment and the second surface to be processed 121b (i.e., the peripheral side surface of the second part 12b) is too small, reducing the polishing effect of the second surface to be processed 121b and making it easy for the second surface to be processed 121b to remain with grinding wheel marks, affecting the appearance effect of the housing 200.

[0071] Please refer to Figure 7, in some embodiments, in S104, the polishing of the first surface to be processed 111b and the second surface to be processed 121b of the intermediate product 10b includes:

[0072] S1041, using a first brush to perform rough polishing on the first surface to be processed 111b and the second surface to be processed 121b of the intermediate product 10b at a first rotation speed;

[0073] S1042, using a second brush to perform medium polishing on the first surface to be processed 111b and the second surface to be processed 121b of the intermediate product 10b at a second rotation speed; and

[0074] S1043, using a third brush to perform fine polishing on the first surface to be processed 111b and the second surface to be processed 121b of the intermediate product 10b at a third rotation speed, wherein the hardness of the first brush is greater than that of the second brush, the hardness of the second brush is greater than that of the third brush, the first rotation speed is greater than the third rotation speed, and the second rotation speed is greater than the third rotation speed.

[0075] Optionally, the intermediate product 10b is set on the fixture of the polishing equipment, and the polishing turntable of the polishing equipment is used to perform rough polishing, medium polishing and fine polishing on the first surface to be processed 111b and the second surface to be processed 121b of the intermediate product 10b in sequence. The polishing turntable includes a first brush, a second brush and a third brush. The first brush, the second brush and the third brush can rotate independently (self-rotate) respectively.

[0076] After the CNC surface reduction and thinning treatment, there will be many small particles remaining on the first surface to be processed 111b and the second surface to be processed 121b of the intermediate product 10b, and there will be grinding wheel lines or grinding wheel marks, which will cause the intermediate product 10b to become foggy. If the grinding wheel lines or grinding wheel marks are not removed, when the housing 200 is subjected to an anti-glare treatment, white bright lines will be formed at the positions of the grinding wheel lines or grinding wheel marks, thus forming grinding wheel line defects and reducing the preparation yield of the housing 200. In this embodiment, by performing rough polishing, medium polishing and fine polishing on the first surface to be processed 111b and the second surface to be processed 121b in sequence, and through the selection and design of the accuracy and rotation speed of the brushes for rough polishing, medium polishing and fine polishing, the grinding wheel marks or grinding wheel lines remaining on the first surface to be processed 111b and the second surface to be processed 121b can be better removed, so that the polishing effect of the first surface to be processed 111b and the second surface to be processed 121b can be better improved, the defect rate of the first surface 211 and the second surface 221 of the obtained housing 200 can be reduced, and the yield and appearance effect of the housing 200 can be improved.

[0077] Optionally, the material of the first brush can be, but is not limited to, a nylon wire brush.

[0078] Optionally, the second brush may be, but is not limited to, an inclined hole mixing brush.

[0079] Optionally, the third brush may be, but is not limited to, a polyurethane brush.

[0080] It can be understood that the first rotation speed is the rotation speed when the first brush performs rough polishing, the second rotation speed is the rotation speed when the second brush performs medium polishing, and the third rotation speed is the rotation speed when the third brush performs fine polishing.

[0081] Optionally, the range of the first rotation speed is from 90 revolutions per minute to 110 revolutions per minute. Specifically, the first rotation speed may be, but is not limited to, 90 revolutions per minute, 92 revolutions per minute, 94 revolutions per minute, 96 revolutions per minute, 98 revolutions per minute, 100 revolutions per minute, 102 revolutions per minute, 104 revolutions per minute, 106 revolutions per minute, 108 revolutions per minute, 110 revolutions per minute, etc. If the first rotation speed is too small, the speed of rough polishing is too slow, reducing the polishing efficiency and requiring a longer time for rough polishing. Without increasing the rough polishing time, the polishing effect is reduced, affecting the appearance of the obtained housing 200. If the first rotation speed is too fast, the cutting force of the first brush is too large, easily lifting the intermediate product 10b from the fixture, resulting in the scrapping of the entire intermediate product 10b and reducing the production yield of the housing 200.

[0082] Optionally, the range of the second rotation speed is from 90 revolutions per minute to 110 revolutions per minute. Specifically, the second rotation speed may be, but is not limited to, 90 revolutions per minute, 92 revolutions per minute, 94 revolutions per minute, 96 revolutions per minute, 98 revolutions per minute, 100 revolutions per minute, 102 revolutions per minute, 104 revolutions per minute, 106 revolutions per minute, 108 revolutions per minute, 110 revolutions per minute, etc. If the second rotation speed is too small, the speed of medium polishing is too slow, reducing the polishing efficiency and requiring a longer time for medium polishing. Without increasing the medium polishing time, the polishing effect is reduced, affecting the appearance of the obtained housing 200. If the second rotation speed is too fast, the cutting force of the second brush is too large, easily lifting the intermediate product 10b from the fixture, resulting in the scrapping of the entire intermediate product 10b and reducing the production yield of the housing 200.

[0083] Optionally, the range of the third rotational speed is from 80 revolutions per minute to 100 revolutions per minute. Specifically, the third rotational speed can be, but is not limited to, 80 revolutions per minute, 82 revolutions per minute, 84 revolutions per minute, 86 revolutions per minute, 88 revolutions per minute, 90 revolutions per minute, 92 revolutions per minute, 94 revolutions per minute, 96 revolutions per minute, 98 revolutions per minute, 100 revolutions per minute, etc. If the third rotational speed is too small, the speed of fine polishing is too slow, reducing the polishing efficiency and requiring a longer time for fine polishing. Without increasing the fine polishing time, the polishing effect is reduced, affecting the appearance of the manufactured housing 200. If the third rotational speed is too fast, the cutting force of the third brush is too large, easily lifting the intermediate product 10b from the fixture, resulting in the scrapping of the entire intermediate product 10b and reducing the production yield of the housing 200.

[0084] Optionally, rough polishing, medium polishing, and fine polishing are all carried out in a cerium oxide polishing liquid.

[0085] Optionally, the range of the mass concentration of cerium oxide particles in the cerium oxide polishing liquid is from 1.15 g / ml to 1.3 g / ml. Specifically, the mass concentration of cerium oxide particles in the cerium oxide polishing liquid can be, but is not limited to, 1.15 g / ml, 1.16 g / ml, 1.18 g / ml, 1.20 g / ml, 1.22 g / ml, 1.24 g / ml, 1.26 g / ml, 1.28 g / ml, 1.3 g / ml, etc. If the mass concentration of cerium oxide particles in the cerium oxide polishing liquid is too low, the polishing cutting force is reduced, and the polishing effect of the first surface to be processed 111b and the second surface to be processed 121b is reduced. If the mass concentration of cerium oxide particles in the cerium oxide polishing liquid is too high, when rough polishing, medium polishing, and fine polishing are sequentially carried out on the first surface to be processed 111b and the second surface to be processed 121b, the resistance of the first brush, the second brush, and the third brush increases, easily lifting the intermediate product 10b from the fixture, resulting in the scrapping of the entire intermediate product 10b and reducing the production yield of the housing 200.

[0086] Please refer to Figure 8 , in some embodiments, after polishing the first surface to be processed 111b and the second surface to be processed 121b, the preparation method further includes:

[0087] S105, removing the protective layer 20a; and

[0088] Optionally, the PE protective layer 20a is removed to expose the third surface to be processed 122b.

[0089] S106. Perform surface roughening on the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b of the intermediate product 10b, so that the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b are all rough surfaces.

[0090] Optionally, the surface roughening treatment may be, but is not limited to, at least one of anti-glare treatment (i.e., sandblasting treatment, flash sand treatment), texture treatment, etc., so that the first surface 211, the second surface 221, and the third surface 222 of the obtained housing 200 are all rough surfaces.

[0091] Optionally, the rough surface includes an anti-glare structure.

[0092] Optionally, the anti-glare structure may be, but is not limited to, at least one of a low-glare anti-glare structure, a common anti-glare structure, a soft-sand anti-glare structure, a high-glare anti-glare structure, a three-star sand anti-glare structure, a fluorite anti-glare structure, etc.

[0093] In this embodiment, performing surface roughening on the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b can make the front surface of the housing 200 all rough surfaces, and the appearance has better uniformity.

[0094] Optionally, after removing the protective layer 20a and before performing surface roughening on the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b of the intermediate product 10b, please refer to Figure 9 , the preparation method may further include: S105’, forming a second protective ink layer with a preset shape (such as a preset pattern or a preset logo) on a part of the surface of the first surface to be processed 111b of the intermediate product 10b.

[0095] In this way, when performing surface roughening, the surface at the position of the first surface to be processed 111b corresponding to the second protective ink layer will not be roughened and remains a smooth surface. Thus, after the intermediate product 10b is surface-roughened, a part of the smooth surface with a preset shape appears in the middle of the rough surface of the first surface to be processed 111b. For example, there is a part of the smooth surface in the middle of the rough surface, and the smooth surface is in the shape of a preset logo.

[0096] Optionally, the second protective ink layer has acid resistance, so that it will not be corroded during the subsequent surface roughening process, and can protect the surface at the position corresponding to the second protective ink layer from being roughened.

[0097] Please refer to Figure 10, in some embodiments, in S106, the surface roughening treatment of the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b of the intermediate product 10b includes:

[0098] S1061, performing pickling treatment on the intermediate product 10b;

[0099] Performing pickling on the intermediate product 10b before the surface roughening treatment can remove the oil stains on the surface of the intermediate product 10b, improve the uniformity of the surface roughening treatment, reduce the appearance defects of the housing 200, and improve the preparation yield of the housing 200.

[0100] Optionally, the pickling treatment of the intermediate product 10b includes: spraying the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b of the intermediate product 10b with a first acid solution, where the first acid solution is an aqueous solution of hydrofluoric acid, sulfuric acid, and nitric acid, and the spraying time range of the first acid solution is 90s to 180s.

[0101] Optionally, the first acid solution includes 5% hydrofluoric acid, 2% sulfuric acid, 2% nitric acid, and water by mass fraction.

[0102] It should be noted that the spraying time of the first acid solution refers to the contact time between the intermediate product 10b and the first acid solution.

[0103] Specifically, the spraying time of the first acid solution can be, but is not limited to, 90s, 100s, 110s, 120s, 130s, 140s, 150s, 160s, 170s, 180s, etc. If the spraying time of the first acid solution is too short, that is, the pickling time is too short, the pickling effect is not good, and the dirt on the surface of the intermediate product 10b cannot be removed cleanly, resulting in easy generation of abnormal colors after the surface roughening treatment and an increase in the appearance defect rate; if the spraying time of the first acid solution is too long, that is, the pickling time is too long, crystal deposits are likely to appear on the surface of the intermediate product 10b, causing point-like appearance defects.

[0104] Optionally, place the intermediate product 10b on the conveyor belt in the pickling area of the equipment. The length of the conveyor belt in the pickling area is 1.5 m. Let the conveyor belt convey at a speed of 0.5 m / min to 1 m / min (for example, it can be but is not limited to 0.5 m / min, 0.6 m / min, 0.7 m / min, 0.8 m / min, 0.9 m / min, 1 m / min, etc.). If the conveyor belt conveying speed is too fast, that is, the pickling treatment time is too short, the pickling effect is not good, and the dirt on the surface of the intermediate product 10b cannot be removed cleanly. After the surface roughening treatment, it is easy to produce different colors, increasing the appearance defect rate; if the conveyor belt conveying speed is too slow, that is, the pickling time is too long, then crystals are likely to adhere to the surface of the intermediate product 10b, causing dot-like appearance defects.

[0105] S1062, spray the etching solution on the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b of the intermediate product 10b to perform surface roughening treatment on the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b. Among them, the temperature range of the etching solution is 31°C to 33°C, and the spraying time range of the etching solution is 36 s to 45 s; and

[0106] It should be noted that the spraying time of the etching solution refers to the contact time between the intermediate product 10b and the etching solution.

[0107] The etching solution can chemically react with the SiO2 component on the glass surface to generate salt crystals and adhere to the glass surface, forming a dense crystal layer. After cleaning, the glass surface presents an uneven morphology, that is, the surface of the glass becomes rough. When light irradiates on this rough surface, diffuse reflection will occur, dispersing the incident light to various angles, thereby reducing the feeling of glare and dizziness, that is, anti-glare.

[0108] Optionally, place the pickled intermediate product 10b on the conveyor belt in the etching area of the equipment. The length of the conveyor belt in the etching area is 3 m. Let the conveyor belt convey at a speed of 4 m / min to 5 m / min (for example, it can be but is not limited to 4 m / min, 4.2 m / min, 4.4 m / min, 4.6 m / min, 4.8 m / min, 5 m / min, etc.). During etching, if the conveyor belt speed is too low, the etching time will be too long, causing secondary etching on the surface of the intermediate product 10b (such as glass), and the haze and roughness will increase; if the conveyor belt speed is too fast, it will lead to insufficient etching time, and the surface of the intermediate product 10b cannot be fully etched, resulting in appearance defects of local non-sanding.

[0109] Optionally, when the intermediate product 10b has a through hole 13b, before etching the intermediate product 10b, a plug body is disposed in the through hole 13b to block the through hole 13b, so as to prevent the etching solution from being sprayed into the through hole 13b during the spray etching of the intermediate product 10b, causing uneven sputtering, resulting in uneven etching on the surface of the intermediate product 10b and causing different colors.

[0110] Specifically, the temperature of the etching solution can be, but is not limited to, 31°C, 31.5°C, 32°C, 32.5°C, 33°C, etc. If the temperature of the etching solution is too high, the etching rate is fast, and it is easy to cause uneven AG etching, resulting in poor AG color difference; if the temperature of the etching solution is too low, the etching rate is slow, which will lead to insufficient etching time and the surface of the intermediate product 10b is not fully etched, resulting in poor appearance of local non-sanding.

[0111] Specifically, the spraying time of the etching solution can be, but is not limited to, 36s, 37s, 38s, 39s, 40s, 41s, 42s, 43s, 44s, 45s, etc. If the spraying time of the etching solution is too long, the etching time is too long, resulting in secondary etching on the surface of the intermediate product 10b (such as glass), and the haze and roughness increase; if the spraying time of the etching solution is too short, it will lead to insufficient etching time and the surface of the intermediate product 10b is not fully etched, resulting in poor appearance of local non-sanding.

[0112] Optionally, the etching solution includes 27% to 36% citric acid, 3% to 4% sulfuric acid, 38% to 42% ammonium bifluoride and water by mass fraction. Specifically, the mass fraction of citric acid in the etching solution can be, but is not limited to, 27%, 28%, 30%, 32%, 34%, 36%, etc. Specifically, the mass fraction of sulfuric acid in the etching solution can be, but is not limited to, 3%, 3.2%, 3.4%, 3.6%, 3.8%, 4%, etc. Specifically, the mass fraction of ammonium bifluoride in the etching solution can be, but is not limited to, 38%, 39%, 40%, 41%, 42%, etc.

[0113] S1063, perform water washing.

[0114] Optionally, water washing can be performed by spraying or soaking in water.

[0115] Optionally, the water temperature for water washing ranges from 7°C to 17°C. Specifically, the water temperature for water washing can be, but is not limited to, 7°C, 9°C, 10°C, 12°C, 14°C, 16°C, 17°C, etc.

[0116] Please refer to Figure 11, in some embodiments, after the surface roughening treatment of the first surface to be processed 111b, the second surface to be processed 121b, and the third surface to be processed 122b of the intermediate product 10b, the preparation method further includes:

[0117] S107. Place the roughened intermediate product 10b in a second acid solution for chemical polishing. During the chemical polishing, bubble the second acid solution. The second acid solution is an aqueous solution including hydrofluoric acid, nitric acid, and hydrochloric acid.

[0118] Optionally, the second acid solution includes 5% hydrofluoric acid, 3% nitric acid, 3% hydrochloric acid, and water by mass fraction.

[0119] In this embodiment, after the surface roughening treatment, chemical polishing is performed. In this way, the sharp protrusions on the surface after the surface roughening treatment can be removed, making the rough surface smoother, thereby reducing stress concentration and improving the mechanical strength of the obtained housing 200. In addition, during the chemical polishing, bubbling in the second acid solution can avoid the deposition of fluorosilicate formed by the reaction of the second acid solution with the glass on the glass surface, affecting the continued etching at this position, so as to better improve the uniformity of chemical polishing and better improve the mechanical strength of the obtained housing 200.

[0120] Optionally, before the chemical polishing, the preparation method further includes: S107', performing stripping to remove the first protective ink layer and the second protective ink layer.

[0121] Optionally, immerse in an aqueous sodium hydroxide solution with a mass fraction of 70% to 80%, and soak at a temperature of 85°C to 95°C for 8 minutes to 13 minutes to remove the first protective ink layer and the second protective ink layer.

[0122] Optionally, the mass fraction of sodium hydroxide can be, but is not limited to, 70%, 72%, 74%, 76%, 78%, 80%, etc. If the mass fraction of sodium hydroxide is too low, the stripping effect is not good, and the first protective ink layer and the second protective ink layer are likely to remain, affecting the appearance effect of the obtained housing 200. If the mass fraction of sodium hydroxide is too high, it is easy to corrode the housing 200, reducing the yield of the housing 200 and being unfavorable to the working environment.

[0123] Optionally, the temperature of the aqueous sodium hydroxide solution (the stripping temperature) can be, but is not limited to, 85°C, 88°C, 90°C, 92°C, 95°C, etc. If the temperature of the aqueous sodium hydroxide solution is too low, the stripping effect is not good, and the first protective ink layer and the second protective ink layer are likely to remain, affecting the appearance effect of the obtained housing 200. If the temperature of the aqueous sodium hydroxide solution is too high, it is easy to corrode the housing 200, reducing the yield of the housing 200 and being unfavorable to the working environment.

[0124] Optionally, the stripping time may be, but is not limited to, 8 minutes, 9 minutes, 10 minutes, 11 minutes, 12 minutes, 13 minutes, etc. If the stripping time is too short, the stripping effect is poor, and the first protective ink layer and the second protective ink layer are likely to remain, affecting the appearance of the manufactured housing 200. If the stripping time is too long, the housing 200 is likely to be corroded, the yield of the housing 200 is reduced, and it is not conducive to the working environment.

[0125] In some embodiments, after the chemical polishing, the preparation method further comprises: performing chemical strengthening.

[0126] Optionally, the shell 200 is placed in a molten salt having alkali metal ions to perform ion exchange on the shell 200 and strengthen the shell 200, so that the shell 200 has a higher mechanical strength. Optionally, the salt having alkali metal ions may include at least one of potassium nitrate and sodium nitrate.

[0127] Please see again Figure 4 and Figure 5 The embodiment of the present application further provides a shell 200, and the shell 200 is prepared by the method for preparing the shell 200 described in the embodiment of the present application.

[0128] Please also see Figure 5 and Figure 12 Optionally, the shell 200 includes a connected main body portion 210 and a boss portion 220; the main body portion 210 is formed by a first portion 11b, and the boss portion 220 is formed by a second portion 12b; the main body portion 210 has a first surface 211, and the boss portion 220 has a second surface 221 and a third surface 222 that are connected by bending, the second surface 221 is the peripheral side surface of the boss portion 220, and the end of the second surface 221 that is away from the third surface 222 is connected to the first surface 211, and the third surface 222 is the surface of the boss portion 220 away from the main body portion 210; the second surface 221 is a concave arc surface, and the second surface 221 has a cut surface, which passes through the connection between the second surface 221 and the third surface 222, and the angle α between the cut surface and the third surface 222 is in the range of 122°≤α≤132°.

[0129] It should be noted that the section surface is not a surface on the housing 200 but a virtual surface.

[0130] The housing 200 of the present application can be applied to portable electronic devices such as mobile phones, tablet computers, laptop computers, desktop computers, smart bracelets, smart watches, e-readers, game consoles, etc. Optionally, the housing 200 can be at least one of a front cover (a protective cover for a display screen), a rear cover (a battery rear cover), a decorative part, and a protective case (i.e., a protective case that is independent of the electronic device and sleeved on the electronic device) of the electronic device.

[0131] Understandably, the first surface 211, the second surface 221, and the third surface 222 are bent and connected in sequence.

[0132] It should be noted that when the housing 200 of the present application is applied to an electronic device, the boss portion 220 is arranged corresponding to the camera module of the electronic device, that is, the boss portion 220 is arranged close to the camera module.

[0133] Optionally, the housing 200 further has a mounting hole 230 that sequentially penetrates through the body portion 210 and the boss portion 220. The mounting hole 230 is used for mounting a camera module, a flash, a fill light, a lighting lamp, a decorative part, etc. of the electronic device.

[0134] Optionally, the number of the mounting holes 230 can be one or more. When the number of the mounting holes 230 is multiple, the multiple mounting holes 230 are arranged at intervals. The number of the mounting holes 230 can be designed according to the number of components such as the camera module and the flash of the electronic device using the housing 200, and the present application does not make specific limitations.

[0135] Specifically, the angle α between the section plane and the third surface 222 can be, but is not limited to, 122°, 123°, 124°, 125°, 126°, 127°, 128°, 129°, 130°, 131°, 132°, etc. If the angle α between the section plane and the third surface 222 is too small, the boss portion 220 is likely to have burrs during processing. In addition, the arc surface of the second surface 221 near the third surface 222 is not easy to be polished brightly (that is, when the intermediate product 10b is polished, the surface of the second surface to be processed 121b near the third surface to be processed 122b is not easy to be polished brightly), thereby reducing the preparation yield of the housing 200. Moreover, the outer periphery of the boss portion 220 is likely to have a scratching feeling, affecting the feel of the housing 200. If the angle α between the section plane and the third surface 222 is too large, the ridge line at the connection between the second surface 221 and the third surface 222 is not straight enough, reducing the appearance effect of the housing 200.

[0136] The housing 200 of the embodiment of the present application includes a main body portion 210 and a boss portion 220. The boss portion 220 protrudes from one side of the main body portion 210. The main body portion 210 has a first surface 211, and the boss portion 220 has a second surface 221 and a third surface 222 that are bent and connected. The second surface 221 is a concave arc surface. The second surface 221 has a section plane, and the section plane passes through the connection between the second surface 221 and the third surface 222. The range of the angle α between the section plane and the third surface 222 is 122° ≤ α ≤ 132°. By designing the angle α between the section plane and the third surface 222, the ridge line of the boss portion 220 of the housing 200 is made more straight, having a better appearance effect. In addition, the housing 200 can be made easier to process and has a higher processing yield.

[0137] In some embodiments, the housing 200 is a glass housing 200, the main body portion 210 is a glass main body portion 210, the boss portion 220 is a glass boss portion 220, and the main body portion 210 and the boss portion 220 are of an integral structure. In this embodiment, the housing 200 is formed by processing a whole piece of glass. The main body portion 210 and the boss portion 220 are two different parts of the same component. There is no phase interface, welding interface, splicing interface, etc. between the main body portion 210 and the boss portion 220. In this embodiment, the main body portion 210 and the boss portion 220 are of an integral structure, which can better simplify the assembly of the housing 200, making it have a better sense of integrity and a better appearance effect.

[0138] In some embodiments, the radius of curvature of the end of the second surface 221 connecting the third surface 222 is smaller than the radius of curvature of the end of the second surface 221 connecting the first surface 211.

[0139] In this embodiment, by making the radius of curvature of the end of the second surface 221 connecting the third surface 222 smaller than the radius of curvature of the end of the second surface 221 connecting the first surface 211, the ridge line of the boss portion 220 can be made to look more straight, thus having a better appearance effect; in addition, it is beneficial to the processing of the end of the second surface 221 near the third surface 222 and the end near the first surface 211; furthermore, it can also make the position of the second surface 221 near the first surface 211 and the first surface 211 transition more smoothly, thus having a better appearance effect.

[0140] In some embodiments, the radius of curvature of the second surface 221 gradually decreases first from one end connecting the third surface 222 to the end connecting the first surface 211, and then gradually increases. This can make the curvature of the second surface 221 transition better, the three-dimensional sense of the boss portion 220 stronger, and the housing 200 have a better appearance effect. In addition, by making the joints of the second surface 221 with the first surface 211 and the second surface 221 with the third surface 222 both have a relatively large radius of curvature, and the second surface 221 has a relatively small radius of curvature near the middle position, this is beneficial to the processing of the second surface 221 and can better improve the processing yield of the housing 200.

[0141] In some embodiments, the range of the minimum radius of curvature R of the second surface 221 is 1.7 mm ≤ R ≤ 2.7 mm.

[0142] It should be noted that the minimum radius of curvature R of the second surface 221 refers to the radius of curvature at the position on the second surface 221 where the radius of curvature is the smallest.

[0143] It should be noted that the minimum radius of curvature R of the second surface 221 can be any value between 1.7 mm and 2.7 mm. Specifically, the minimum radius of curvature R of the second surface 221 can be, but is not limited to, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, 2.1 mm, 2.2 mm, 2.3 mm, 2.4 mm, 2.5 mm, 2.6 mm, 2.7 mm, etc.

[0144] In this embodiment, if the minimum radius of curvature R of the second surface 221 is too large, the straightness of the boss portion 220 is insufficient, reducing the appearance effect of the housing 200; if the minimum radius of curvature R of the second surface 221 is too small, the processing difficulty of the second surface 221 increases, making it difficult to polish the second surface 221, and reducing the preparation yield of the housing 200.

[0145] Please refer to Figure 12 , in some embodiments, the range of the line width w of the orthographic projection of the second surface 221 on the first surface 211 is 2 mm ≤ w ≤ 2.4 mm.

[0146] It should be noted that the second surface 221 is disposed around the outer periphery of the third surface 222, and the first surface 211 is disposed around the outer periphery of the second surface 221.

[0147] It should be noted that the orthographic projection of the second surface 221 on the first surface 211 is an annular structure, and the range of the line width w of this annular structure is 2 mm ≤ w ≤ 2.4 mm.

[0148] Optionally, the third surface 222 is parallel to the first surface 211. This makes the overall appearance of the housing 200 better.

[0149] It can be understood that the line width w of the orthographic projection of the second surface 221 on the first surface 211 can be any value between 2 mm and 2.4 mm. Specifically, the line width w of the orthographic projection of the second surface 221 on the first surface 211 can be, but is not limited to, 2 mm, 2.05 mm, 2.1 mm, 2.15 mm, 2.2 mm, 2.25 mm, 2.3 mm, 2.35 mm, 2.4 mm, etc.

[0150] In this embodiment, if the line width w of the orthographic projection of the second surface 221 on the first surface 211 is too small, the curvature transition of the second surface 221 of the boss portion 220 is not obvious, reducing the appearance effect of the housing 200. In addition, the boss portion 220 is likely to scratch the hand, affecting the feel of the housing 200; if the line width w of the orthographic projection of the second surface 221 on the first surface 211 is too large, the area of the second surface 221 is too large, reducing the processing efficiency of the housing 200 and increasing the manufacturing cost of the housing 200.

[0151] Please refer to Figure 12 , in some embodiments, along the arrangement direction of the body portion 210 and the boss portion 220, the height h of the boss portion 220 ranges from 0.93 mm ≤ h ≤ 1.03 mm.

[0152] It can be understood that along the thickness direction of the housing 200, the height h of the boss portion 220 ranges from 0.93 mm ≤ h ≤ 1.03 mm.

[0153] It can be understood that along the arrangement direction of the body portion 210 and the boss portion 220, the height h of the boss portion 220 can be any value between 0.93 mm and 1.03 mm. Specifically, along the arrangement direction of the body portion 210 and the boss portion 220, the height h of the boss portion 220 can be, but is not limited to, 0.93 mm, 0.94 mm, 0.95 mm, 0.96 mm, 0.97 mm, 0.98 mm, 0.99 mm, 1.00 mm, 1.01 mm, 1.02 mm, 1.03 mm, etc.

[0154] When the housing 200 is applied to an electronic device, the mounting hole 230 is used to set the components of the electronic device, and a camera module is provided at a position corresponding to the mounting hole 230. In this embodiment, along the arrangement direction of the main body 210 and the boss portion 220, the height h of the boss portion 220 is too small. When the housing 200 is applied to the electronic device, the housing 200 is easy to interfere with the camera module, affecting the assembly of the camera module. In addition, the three-dimensional sense of the boss portion 220 is reduced, and the appearance effect of the housing 200 is reduced; along the arrangement direction of the main body 210 and the boss portion 220, the height h of the boss portion 220 is too large. When the housing 200 is applied to the electronic device and the components of the electronic device are installed, it is necessary to dispense glue in the mounting hole 230 to bond the components. The height of the boss portion 220 is too large, which increases the difficulty of dispensing glue in the mounting hole 230, so that the components are not firmly bonded.

[0155] Optionally, the first surface 211 , the second surface 221 , and the third surface 222 are all rough surfaces.

[0156] Optionally, the rough surface comprises an anti-glare structure.

[0157] Optionally, the anti-glare structure may be but is not limited to at least one of a low-flash anti-glare structure, a common anti-glare structure, a soft sand anti-glare structure, a high-flash anti-glare structure, a three-star sand anti-glare structure, a fluorite anti-glare structure, etc.

[0158] See also Figures 13 to 15 The embodiment of the present application further provides an electronic device 300, which includes a display screen 310, a housing 200 described in the embodiment of the present application, and a processor 330. The housing 200 and the display screen 310 are arranged opposite to each other; the processor 330 is located between the housing 200 and the display screen 310, and the processor 330 is electrically connected to the display screen 310 for controlling the display screen 310 to display.

[0159] It can be understood that the boss portion 220 is disposed away from the display screen 310 .

[0160] The electronic device 300 of the embodiment of the present application may be, but is not limited to, a portable electronic device 300 such as a mobile phone, a tablet computer, a laptop computer, a desktop computer, a smart bracelet, a smart watch, an e-reader, a game console, etc.

[0161] For a detailed description of the housing 200, please refer to the description of the corresponding part of the above embodiment, which will not be repeated here. It should be noted that in this embodiment, the housing 200 is illustrated and described as a battery back cover of an electronic device 300, which should not be understood as a limitation on the housing 200 of the embodiment of the present application.

[0162] Optionally, the display screen 310 may be, but is not limited to, one or more of a liquid crystal display screen, a light-emitting diode display screen (LED display screen), a micro light-emitting diode display screen (Micro LED display screen), a submillimeter light-emitting diode display screen (Mini LED display screen), an organic light-emitting diode display screen (OLED display screen), etc.

[0163] Optionally, the processor 330 includes one or more general-purpose processors. Among them, the general-purpose processor can be any type of device capable of processing electronic instructions, including a central processing unit (CPU), a microprocessor, a microcontroller, a main processor, a controller, and an ASIC, etc. The processor 330 is used to execute various types of digital storage instructions, such as software or firmware programs stored in the memory, which can enable the computing device to provide a wide variety of services.

[0164] Optionally, the electronic device 300 of the present application further includes a memory 350. The memory 350 is electrically connected to the processor 330 and is used to store the program code required for the operation of the processor 330, the program code required for controlling the display screen 310, the display content of the display screen 310, etc.

[0165] Optionally, the memory 350 may include a volatile memory, such as a random access memory (RAM); the memory 350 may also include a non-volatile memory (Non-Volatile Memory, NVM), such as a read-only memory (ROM), a flash memory (Flash Memory, FM), a hard disk drive (HDD), or a solid-state drive (SSD). The memory 350 may also include a combination of the above types of memories.

[0166] In some embodiments, the electronic device 300 of the embodiments of the present application further includes a middle frame 320 and a camera module 370. The middle frame 320 is disposed between the display screen 310 and the housing 200, and the side surface of the middle frame 320 is exposed between the housing 200 and the display screen 310. The middle frame 320 and the housing 200 enclose a receiving space (not shown in the figure), and the receiving space is used to receive the processor 330, the memory 350, and the camera module 370. The camera module 370 is electrically connected to the processor 330 and is used to perform shooting under the control of the processor 330.

[0167] Optionally, the camera module 370 can take pictures through the boss portion 220 on the housing 200, that is, the camera module 370 in this embodiment is a rear camera module 370.

[0168] It can be understood that the electronic device 300 described in this embodiment is only one form of the electronic device 300 to which the housing 200 is applied, and should not be construed as a limitation on the electronic device 300 provided in this application, nor should it be construed as a limitation on the housing 200 provided in each embodiment of this application.

[0169] In this application, referring to "embodiment" or "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of this application. The phrase appears in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described in this application can be combined with other embodiments. In addition, it should also be understood that the features, structures or characteristics described in each embodiment of this application can be combined arbitrarily without contradiction to form another embodiment that does not depart from the spirit and scope of the technical solution of this application.

[0170] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and not to limit them. Although the technical solutions of this application have been described in detail with reference to the above preferred embodiments, those of ordinary skill in the art should understand that modifications or equivalent replacements can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A method for preparing a housing, characterized in that, include: Providing a substrate, wherein the substrate has a predetermined surface; Performing a thinning process on a partial area on the preset surface of the substrate to obtain an intermediate product, wherein the intermediate product includes a first portion and a second portion connected to each other, wherein the first portion has a first surface to be processed, the second portion is convexly disposed on the first surface to be processed of the first portion, the second portion has a second surface to be processed and a third surface to be processed that are connected by bending, the second surface to be processed is a peripheral side surface of the second portion, and the third surface to be processed is a surface of the second portion that is away from the first portion; Injection molding a protective layer on the third to-be-processed surface of the second portion; as well as The first to-be-processed surface and the second to-be-processed surface of the intermediate product are polished.

2. The manufacturing method of the housing according to claim 1, characterized in that The outer periphery of the protection layer is retracted by 0.05 mm to 0.1 mm compared to the outer periphery of the second portion.

3. The manufacturing method of the housing according to claim 1, characterized in that, The thickness of the protective layer ranges from 0.9 mm to 1.1 mm.

4. The manufacturing method of the housing according to claim 1, characterized in that, The polishing of the first to-be-processed surface and the second to-be-processed surface of the intermediate product comprises: Using a first brush to roughly polish the first to-be-processed surface and the second to-be-processed surface of the intermediate product at a first rotation speed; Using a second brush to perform intermediate polishing on the first to-be-processed surface and the second to-be-processed surface of the intermediate product at a second rotation speed; and A third brush is used to fine-polish the first surface to be processed and the second surface to be processed of the intermediate product at a third rotational speed, wherein the hardness of the first brush is greater than that of the second brush, the hardness of the second brush is greater than that of the third brush, the first rotational speed is greater than the third rotational speed, and the second rotational speed is greater than the third rotational speed.

5. The manufacturing method of the housing according to claim 1, characterized in that, After polishing the first surface to be processed and the second surface to be processed, the preparation method further comprises: removing the protective layer; and The first to-be-processed surface, the second to-be-processed surface and the third to-be-processed surface of the intermediate product are subjected to surface roughening treatment, so that the first to-be-processed surface, the second to-be-processed surface and the third to-be-processed surface are all rough surfaces.

6. The manufacturing method of the housing according to claim 1, characterized in that, The performing surface roughening treatment on the first to-be-processed surface, the second to-be-processed surface and the third to-be-processed surface of the intermediate product comprises: Performing pickling treatment on the intermediate product; Spraying the first to-be-processed surface, the second to-be-processed surface, and the third to-be-processed surface of the intermediate product with etching solution to perform surface roughening treatment on the first to-be-processed surface, the second to-be-processed surface, and the third to-be-processed surface, wherein the temperature of the etching solution is in the range of 31° C. to 33° C., and the spraying time of the etching solution is in the range of 36s to 45s; and Wash with water.

7. The manufacturing method of the housing according to claim 6, characterized in that, The pickling treatment of the intermediate product comprises: The first to-be-processed surface, the second to-be-processed surface and the third to-be-processed surface of the intermediate product are sprayed with a first acid liquid, wherein the first acid liquid is an aqueous solution of hydrofluoric acid, sulfuric acid and nitric acid, and the spraying time of the first acid liquid ranges from 90s to 180s.

8. The manufacturing method of the housing according to claim 5, characterized in that After the surface roughening treatment is performed on the first to-be-processed surface, the second to-be-processed surface and the third to-be-processed surface of the intermediate product, the preparation method further comprises: The intermediate product after the roughening treatment is placed in a second acid solution for chemical polishing. During the chemical polishing, the second acid solution is bubbled. The second acid solution is an aqueous solution including hydrofluoric acid, nitric acid and hydrochloric acid.

9. A housing, characterized in that, The shell is prepared by the shell preparation method according to any one of claims 1 to 8.

10. The housing according to claim 9, characterized in that, The shell comprises a main body and a boss portion connected to each other; the main body is formed by the first portion, and the boss portion is formed by the second portion; the main body has a first surface, and the boss portion has a second surface and a third surface connected by bending, the second surface is a peripheral side surface of the boss portion, an end of the second surface away from the third surface is connected to the first surface, and the third surface is a surface of the boss portion away from the main body; The second surface is a concave arc surface, and the second surface has a cut surface, the cut surface passes through the connection between the second surface and the third surface, and the angle α between the cut surface and the third surface is in the range of 122°≤α≤132°.

11. An electronic device, characterized in that, include: Display screen; The shell obtained by the method for preparing a shell according to any one of claims 1 to 8 or the shell according to claim 9 or 10, wherein the shell is arranged opposite to the display screen; as well as A processor is located between the housing and the display screen, and the processor is electrically connected to the display screen to control the display screen to display.

Images