A housing and a manufacturing method thereof, a terminal device

Abstract

The embodiment of the present application relates to the technical field of terminal equipment, and provides a shell and a manufacturing method thereof, and terminal equipment, which can solve the problem of high manufacturing cost of the shell of the terminal equipment in the related art.The shell comprises a bottom wall and a side wall connected to the edge of the bottom wall by bending, a portion of the side wall away from the bottom wall is bent inward to form an inner bent wall, and a portion of the side wall between the inner bent wall and the bottom wall is a vertical wall; a first structure part formed by pressure processing is arranged at a first corner formed by the inner bent wall and the vertical wall, plastic deformation occurs at a first fillet outside the first corner, and the radius of the first fillet is reduced.The present application can be used in terminal equipment such as notebook computers and tablet computers.

Description

Technical Field

[0001] This application relates to the field of terminal equipment technology, and in particular to a housing, its manufacturing method, and a terminal device. Background Technology

[0002] As people's living standards improve, terminal devices such as laptops, mobile phones, and tablets have become important tools for daily work and entertainment. The casing of these devices is a crucial component, making its design and manufacture a significant challenge for the industry.

[0003] One type of terminal device housing in related technologies is formed by bending sheet metal through pressure processing. The corners of the housing typically have rounded corners due to the bending. Since excessively large rounded corners can affect the appearance and refinement of the housing, to reduce their size, the housing is machined using CNC machining after forming to remove the material around the rounded corners. However, adding this CNC machining step is time-consuming, resulting in low production efficiency for the housing. Summary of the Invention

[0004] Embodiments of this application provide a housing, a manufacturing method thereof, and a terminal device to address the problem of low production efficiency of housings for terminal devices in related technologies.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a housing, including a bottom wall and a side wall bent and connected to the edge of the bottom wall. The portion of the side wall away from the bottom wall is bent inward to form an inner folded wall, and the portion of the side wall between the inner folded wall and the bottom wall is a vertical wall. A first structural part formed by pressure processing is provided at a first corner formed by the inner folded wall and the vertical wall, so that a first rounded corner located outside the first corner undergoes plastic deformation to reduce the radius of the first rounded corner.

[0007] By adopting the above technical solution, the radius of the first fillet can be reduced by pressure processing instead of the time-consuming CNC milling process. This not only helps to shorten the manufacturing time of the housing and improve the manufacturing efficiency of the housing, but also avoids leaving milling cutter marks on the outer surface of the housing.

[0008] In some embodiments, the first structural portion includes a first groove disposed on the inner side of the first corner and extending circumferentially along the housing.

[0009] By adopting the above technical solution, the impact on the structural integrity and strength of the sidewall is relatively small.

[0010] In some embodiments, the first groove is disposed at the junction of the vertical wall and the inner folded wall.

[0011] By adopting the above technical solution, the position of the first groove can be closer to the first fillet, making the first groove easier to form.

[0012] In some embodiments, the wall thickness of the vertical wall is d1, and the groove depth of the first groove is h1, where h1 = (0.125~0.1875)d1.

[0013] By adopting the above technical solution, the strength at the first corner can be guaranteed, while ensuring that the reduction in the first rounded corner is not too small.

[0014] In some embodiments, the first structural portion includes a first extrusion surface located outside the inner folded wall and connected to the first rounded corner.

[0015] By adopting the above technical solution, when the first extrusion surface is formed, a portion of the material on the outer side of the inner folded wall is extruded to the first rounded corner, thereby further reducing the radius of the first rounded corner.

[0016] In some embodiments, a second structural part formed by pressure processing is provided at the second corner formed by the sidewall and the bottom wall, so that the second rounded corner located outside the second corner undergoes plastic deformation to reduce the radius of the second rounded corner.

[0017] By adopting the above technical solution, not only can the manufacturing time of the shell be shortened and the manufacturing efficiency of the shell be improved, but also the milling cutter marks can be avoided on the outer surface of the shell.

[0018] In some embodiments, the second structural portion includes a second groove disposed on the inner side of the second corner and extending circumferentially along the housing.

[0019] By adopting the above technical solution, the impact on the structural integrity and structural strength at the edge of the shell is relatively small.

[0020] In some embodiments, the second groove is disposed at the junction of the bottom wall and the side wall.

[0021] By adopting the above technical solution, the position of the second groove can be made closer to the second fillet, thereby making the second groove easier to form.

[0022] In some embodiments, the wall thickness of the bottom wall is d2, and the groove depth of the second groove is h2, where h2 = (0.125~0.1875)d2.

[0023] By adopting the above technical solution, we can ensure the strength of the second corner while ensuring that the reduction in the second rounded corner is not too small.

[0024] In some embodiments, the second structural portion includes a second extrusion surface located at the end of the sidewall away from the bottom wall.

[0025] By adopting the above technical solution, when the second extrusion surface is formed, a portion of the sidewall material is extruded to the second rounded corner, thereby further reducing the radius of the second rounded corner.

[0026] In some embodiments, the bottom wall, the vertical wall, and the inner folded wall have the same wall thickness.

[0027] By adopting the above technical solution, large deformation at the edge of the shell is avoided under the action of external force, thus ensuring the reliability of the shell structure.

[0028] In some embodiments, the upright wall has an opening, and the inner folded wall is disposed at the location of the opening along the circumference of the housing.

[0029] By adopting the above technical solution, the strength of the shell at the opening position is increased, which greatly increases the rigidity and bending resistance of the shell.

[0030] Secondly, embodiments of this application provide a terminal device, characterized in that it includes the housing described in the first aspect.

[0031] The terminal device in the second aspect achieves the same technical effect as the housing in the first aspect, and will not be described again here.

[0032] Thirdly, embodiments of this application provide a method for manufacturing a shell, comprising: bending an edge region of a sheet metal to form a sidewall of the shell, wherein a central region of the sheet metal forms a bottom wall of the shell; bending a portion of the sidewall away from the bottom wall inward to form an inner folded wall; wherein the portion of the sidewall located between the inner folded wall and the bottom wall is a vertical wall; and performing pressure processing on a first corner formed by the inner folded wall and the vertical wall to cause plastic deformation at a first rounded corner located outside the first corner, thereby reducing the radius of the first rounded corner.

[0033] The manufacturing method of the shell in the third aspect has the same technical effect as that of the shell in the first aspect, and will not be described again here.

[0034] In some embodiments, pressure processing of the first corner includes: pressing the inside of the first corner to form a first groove extending circumferentially along the housing.

[0035] By adopting the above technical solution, the impact on the structural integrity and strength of the sidewall is relatively small.

[0036] In some embodiments, while bending the portion of the sidewall away from the bottom wall inward, the inside of the first corner is squeezed to form the first groove.

[0037] By adopting the above technical solution, it is beneficial to save processes and further improve the manufacturing efficiency of the shell.

[0038] In some embodiments, pressure processing of the first corner further includes: clamping the vertical wall after the first groove is formed to prevent the vertical wall from undergoing plastic deformation in the thickness direction, and then stamping or extruding the inner folded wall in a direction close to the bottom wall to reduce the radius of the first rounded corner and forming a first extrusion surface on the outer side of the inner folded wall.

[0039] By adopting the above technical solution, the inner folded wall is subjected to compressive force and undergoes plastic deformation towards the bottom wall. A portion of the material on the outer side of the inner folded wall is squeezed to the first rounded corner, thereby further reducing the radius of the first rounded corner. By clamping the vertical wall, it is possible to prevent the vertical wall from undergoing plastic deformation under pressure, which would otherwise cause wrinkles on the vertical wall.

[0040] In some embodiments, after bending the edge region of the sheet metal to form the sidewall of the housing, the method further includes: performing pressure processing on the second corner formed by the sidewall and the bottom wall to cause plastic deformation at the second rounded corner located outside the second corner, thereby reducing the radius of the second rounded corner.

[0041] By adopting the above technical solution, not only can the manufacturing time of the shell be shortened and the manufacturing efficiency of the shell be improved, but the milling cutter marks can also be avoided on the outer surface of the shell.

[0042] In some embodiments, pressure processing of the second corner includes: pressing the inside of the second corner to form a second groove extending circumferentially along the housing.

[0043] By adopting the above technical solution, the impact on the structural integrity and structural strength at the edge of the shell is relatively small.

[0044] In some embodiments, pressure processing of the second corner further includes: after the second groove is formed, clamping the sidewall to prevent plastic deformation of the sidewall in the thickness direction, and then stamping or extruding the end of the sidewall away from the bottom wall in a direction close to the bottom wall to reduce the radius of the second rounded corner, and forming a second extrusion surface at the end of the sidewall away from the bottom wall.

[0045] By employing the above technical solution, a portion of the sidewall material is compressed to the second rounded corner, thereby further reducing the radius of the second rounded corner. By clamping the sidewall, plastic deformation under pressure can be avoided, preventing wrinkles from forming on the sidewall.

[0046] In some embodiments, bending the edge region of the sheet metal to form a sidewall of the housing and pressing the inner side of the second corner to form a second groove extending circumferentially along the housing includes: bending the edge region of the sheet metal inward at a preset angle to form the sidewall, and then pressing the inner side of the second corner to form a transition groove; wherein the preset angle is less than 90°; continuing to bend the sidewall inward to a preset position, and pressing the position of the transition groove to form the second groove.

[0047] By adopting the above technical solution, this design can avoid excessive plastic deformation at the second corner, which would cause wrinkles to form on the outer surface of the second corner, thereby ensuring the smoothness of the appearance at the second corner.

[0048] In some embodiments, the preset angle range is 45° to 70°.

[0049] By adopting the above technical solution, it is possible to ensure that the amount of plastic deformation at the second corner of the sidewall is relatively small during each bend, thereby ensuring the flatness of the outer surface of the second corner. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the structure of a laptop computer in some embodiments of this application;

[0051] Figure 2 for Figure 1 A structural diagram of the front of the main unit;

[0052] Figure 3 for Figure 1 A schematic diagram of the structure on the back of the main unit;

[0053] Figure 4 for Figure 1 An exploded view of the main unit after its internal electronic components have been removed.

[0054] Figure 5 This is a cross-sectional view of the main body of a laptop computer at its edge, according to related technologies.

[0055] Figure 6 This is a cross-sectional view of the main body of another type of laptop computer at its edge in the related art;

[0056] Figure 7 for Figure 6 A schematic diagram of the CNC machining process for removing material from the casing of a laptop computer after it has been formed.

[0057] Figure 8 for Figure 3 AA-shaped sectional view of the main unit;

[0058] Figure 9 for Figure 3 The edge of the main body is shown in a cross-sectional view in some other embodiments;

[0059] Figure 10a for Figure 8 A schematic diagram of the manufacturing process of the shell shown;

[0060] Figure 10b for Figure 8 A flowchart illustrating the manufacturing process of the casing;

[0061] Figure 11 for Figure 9 A schematic diagram of the manufacturing process of the shell shown;

[0062] Figure 12 This is a schematic diagram of the structure of a tablet computer in some embodiments of this application;

[0063] Figure 13 for Figure 12 A magnified view of part A in the middle;

[0064] Figure 14 for Figure 13 BB stereoscopic sectional view. Detailed Implementation

[0065] In the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0066] The terminal device in this application embodiment can be a mobile phone, tablet computer, laptop computer, wearable device (such as a smartwatch), or other terminal device.

[0067] The following uses laptops and tablets as examples to illustrate the specific structure and manufacturing method of the terminal device casing. Other terminal devices can be set up by referring to the casing and manufacturing method in the laptop and tablet embodiments, and will not be described in detail here.

[0068] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a laptop computer in some embodiments of this application. In this embodiment, the terminal device is a laptop computer, which includes a display screen 200 and a main body 100. The display screen 200 and the main body 100 are rotatably connected so that the display screen 200 and the main body 100 can be in a folded state and an open state. Figure 1 Switch between the states shown.

[0069] When in the open state, the display surface of the display screen 200 is at a certain angle to the host body 100, such as 90° or 120°; when in the folded state, the display surface of the display screen 200 is superimposed on the host body 100, that is, the display surface of the display screen 200 and the host body 100 are parallel or approximately parallel (for example, the deviation is within 5°).

[0070] The display screen 200 and the main body 100 can be hinged together by a hinge axis or by a hinge structure, without any specific limitation.

[0071] In some embodiments, the display screen 200 is detachably connected to the main unit 100. This design allows the display screen 200 to be placed on the main unit 100 during use, and to be detached from the main unit 100 after use, making the laptop more convenient to carry and use.

[0072] like Figure 2 , Figure 3 and Figure 4 As shown, Figure 2 for Figure 1 A structural diagram of the front of the main unit 100. Figure 3 for Figure 1 A structural diagram of the back of the main unit 100. Figure 4 for Figure 1 An exploded view of the main unit 100 after its internal electronic components have been removed.

[0073] The main unit 100 includes a housing 10 (also referred to as a "cover") and a back cover 20. A keyboard 710 and a touchpad 720 are mounted on one side of the housing 10. Figure 1 (As shown).

[0074] The back cover 20 is detachably fastened to the back side of the housing 10, so that the back cover 20 and the housing 10 form a receiving space for housing the internal electronic components of the laptop.

[0075] The back cover 20 can be detachably connected to the housing 10 via fasteners such as screws (e.g., Figure 3 (As shown), it can also be snapped into the housing 10 for detachable connection, which is not specifically limited here.

[0076] like Figure 5 As shown, Figure 5 This is a cross-sectional view of the main body 100 of a laptop computer at its edge in the related art. The housing 10 includes a bottom wall 1 and a side wall 2 bent and connected to the edge of the bottom wall 1. The angle between the side wall 2 and the bottom wall 1 is approximately perpendicular. The back cover 20 is detachably fastened to the back of the housing 10 and is connected to the side wall 2.

[0077] However, in this structure of the casing 10, the seam between the back cover 20 and the side wall 2 is too close to the outer surface of the casing 10 (the outer surface of the side wall 2). When the laptop is placed flat on the edge of the table, the user can easily see the seam from the lower side of the laptop, which affects the appearance and sophistication of the laptop.

[0078] Therefore, related technologies have provided a laptop casing 10, such as... Figure 6 and Figure 7 As shown, Figure 6 This is a cross-sectional view at the edge of the main body 100 of another type of laptop computer in the related art. Figure 7 for Figure 6 A schematic diagram of the removal of material from the casing 10 of a laptop computer after it has been formed using CNC machining.

[0079] The casing 10 includes a bottom wall 1 and a side wall 2 bent and connected to the edge of the bottom wall 1. The portion of the side wall 2 away from the bottom wall 1 is bent inward to form an inner folded wall 21. The back cover 20 is detachably fastened to the back of the casing 10 and is connected to the inner folded wall 21. By providing the inner folded wall 21, the distance between the seam and the outer surface of the casing 10 is increased, making the seam less visible to the user, thus making the laptop's appearance cleaner and improving its overall refinement.

[0080] like Figure 6As shown, a first rounded corner 23 exists at the bend of the inner folded wall 21. If the radius of this first rounded corner 23 is too large, it will affect the appearance and refinement of the housing 10. Since this first rounded corner 23 is located on the side wall 2 of the housing 10, it is not easy to make it smaller during the bending process of the side wall 2. In general bending forming processes (such as stamping bending), the radius of this first rounded corner 23 is more than 1 times the wall thickness of the side wall 2. Therefore, in order to reduce the radius of this first rounded corner 23, the housing 10 in the related technology is formed by CNC milling after bending to remove the material around the first rounded corner 23 (such as…). Figure 7 As shown in the figure, the dashed part is the outline of the side wall 2 before the material is removed, and the solid part is the outline of the side wall 2 after the material is removed. That is, the thickness of the side wall 2 (including the inner folded wall 21) is milled thinner. At this time, the wall thickness of the side wall 2 is less than the wall thickness of the bottom wall 1, thereby achieving the purpose of reducing the radius of the first fillet 23.

[0081] However, CNC milling is time-consuming, which increases the manufacturing time of the housing 10 and reduces its manufacturing efficiency. Furthermore, CNC milling leaves milling marks on the surface around the first fillet 23, affecting the appearance of the housing 10.

[0082] To address the issue of low manufacturing efficiency of the housing 10 in related technologies, such as Figure 8 As shown, Figure 8 for Figure 3 A cross-sectional view (AA) of the main body 100. The housing 10 includes a bottom wall 1 and a side wall 2 bent and connected to the edge of the bottom wall 1. The portion of the side wall 2 away from the bottom wall 1 is bent inward to form an inner folded wall 21. The portion of the side wall 2 between the inner folded wall 21 and the bottom wall 1 is a vertical wall 22. A first structural part 25 formed by pressure processing is provided at the first corner 24 formed by the inner folded wall 21 and the vertical wall 22, so that the first rounded corner 23 located outside the first corner 24 undergoes plastic deformation to reduce the radius of the first rounded corner 23.

[0083] Specifically, "the first corner 24" refers to the area formed by the inner folded wall 21 and the vertical wall 22 at a certain angle. This area includes the inner folded wall 21, the transition area where the inner folded wall 21 and the vertical wall 22 meet, and a part of the vertical wall 22 that is close to the inner folded wall 21.

[0084] By setting the first structural part 25 formed by pressure processing, plastic deformation can be caused at the first fillet 23 to reduce the radius of the first fillet 23. In this way, pressure processing can replace the time-consuming CNC milling process to reduce the radius of the first fillet 23. This not only helps to shorten the manufacturing time of the housing 10 and improve the manufacturing efficiency of the housing 10, but also avoids leaving milling cutter marks on the outer surface of the housing 10.

[0085] The shell 10 can be made of a metal or alloy that is prone to plastic deformation, such as aluminum, aluminum alloy, or steel (e.g., stainless steel). The angle formed between the inner folded wall 21 and the vertical wall 22 can be an obtuse angle (e.g., ...). Figure 8 (As shown), it can also be a right angle, depending on the actual situation.

[0086] In some embodiments, such as Figure 8 As shown, the first structural part 25 includes a first groove 251, which is disposed on the inner side of the first corner 24 and extends circumferentially along the housing 10. When the first groove 251 is formed, the material at the location of the first groove 251 is squeezed from the inner side of the sidewall 2 to the location of the first rounded corner 23, thereby reducing the radius of the first rounded corner 23. The provision of the first groove 251 only causes local plastic deformation at the first corner 24, thus having a relatively small impact on the structural integrity and structural strength of the sidewall 2.

[0087] In some embodiments, such as Figure 8 As shown, the first groove 251 is located at the junction of the vertical wall 22 and the inner folded wall 21. This design allows the first groove 251 to be closer to the first rounded corner 23. When the first groove 251 is formed, the material at the location of the first groove 251 is more easily squeezed to the first rounded corner 23, thus making the first groove 251 easier to form.

[0088] Of course, in addition to being located at the junction of the inner folded wall 21 and the vertical wall 22, the first groove 251 can also be located on the inner surface of the vertical wall 22 or the inner folded wall 21, without any specific limitation here.

[0089] The groove depth h1 of the first groove 251 is an important parameter of the shell 10. h1 should not be too large or too small. If h1 is too large, the strength at the first corner 24 will be reduced, and the first corner 24 will be prone to fracture under external force. If h1 is too small, when the first groove 251 is formed, there will be less material squeezed to the first fillet 23, resulting in a small reduction in the fillet 23. Research has found that when h1 = (0.125~0.1875)d1, the strength at the first corner 24 can be guaranteed while ensuring that the reduction in the fillet 23 is not too small. Here, d1 is the wall thickness of the vertical wall 22.

[0090] For example, when the wall thickness d1 of the vertical wall 22 is 0.8mm, the groove depth h1 of the first groove 251 should be set to 0.1~0.15mm. This can ensure the strength at the first corner 24 and prevent the reduction of the first rounded corner 23 from being too small.

[0091] In some embodiments, such as Figure 8 As shown, the first structural part 25 also includes a first extrusion surface 252, which is located on the outside of the inner folded wall 21 and is in contact with the first rounded corner 23. When the first extrusion surface 252 is formed, the inner folded wall 21 is subjected to extrusion force and undergoes plastic deformation in the direction close to the bottom wall 1. A portion of the material on the outside of the inner folded wall 21 is extruded to the first rounded corner 23, thereby further reducing the radius of the first rounded corner 23.

[0092] For example, the wall thickness of the side wall 2 is 0.8mm (that is, the thickness of the vertical wall 22 and the inner folded wall 21 is 0.8mm). By setting the first groove 251, the radius of the first rounded corner 23 can be reduced to 0.8mm. By setting the first extrusion surface 252, the radius of the first rounded corner 23 can be further reduced to 0.3mm on the basis of 0.8mm.

[0093] The first extrusion surface 252 can be formed by stamping (such as upsetting), but it is not limited to this. The first extrusion surface 252 can also be formed by extrusion. No specific limitation is made.

[0094] It should be noted that upsetting is a type of stamping. Upsetting forming mold consists of a male mold (also called a punch) and a female mold (also called a die). Extrusion is a processing method in which a blank is placed in an extrusion die cavity, and pressure is applied to the blank by a fixed punch on a press at room temperature, causing the blank to undergo plastic deformation to obtain a part.

[0095] In addition to including both the first groove 251 and the first extrusion surface 252, the first structural part 25 may also include only one of the two, which can also achieve the purpose of reducing the radius of the first fillet 23.

[0096] In some embodiments, such as Figure 9 As shown, Figure 9 for Figure 3 The edge of the main unit 100 is shown in a cross-sectional view in some other embodiments. This embodiment is... Figure 8 Based on the embodiment shown, a second structural part 4 formed by pressure processing is provided at the second corner 3 formed by the side wall 2 and the bottom wall 1, so that the second rounded corner 5 located outside the second corner 3 undergoes plastic deformation to reduce the radius of the second rounded corner 5.

[0097] Specifically, "the second corner 3" refers to the area formed by the side wall 2 and the bottom wall 1 at a certain angle. This area includes the side wall 2, the transition area where the side wall 2 and the bottom wall 1 meet, and the part of the bottom wall 1 that is close to the side wall 2.

[0098] By setting the second structural part 4 formed by pressure processing, plastic deformation can be performed at the second fillet 5 to reduce the radius of the second fillet 5, so as to make the appearance of the housing 10 more refined. This eliminates the need for time-consuming CNC milling to reduce the radius of the second fillet 5, which not only helps to shorten the manufacturing time of the housing 10 and improve the manufacturing efficiency of the housing 10, but also avoids leaving milling cutter marks on the surface of the housing 10.

[0099] In some embodiments, such as Figure 9 As shown, the second structural part 4 includes a second groove 41, which is disposed on the inner side of the second corner 3 and extends circumferentially along the housing 10. When the second groove 41 is formed, the material at the location of the second groove 41 is squeezed from the inner side of the second corner 3 to the location of the second rounded corner 5, thereby reducing the radius of the second rounded corner 5. The provision of the second groove 41 only causes local plastic deformation at the second corner 3, thus having a relatively small impact on the structural integrity and structural strength at the edge of the housing 10.

[0100] In some embodiments, such as Figure 9 As shown, the second groove 41 is located at the junction of the bottom wall 1 and the side wall 2. This design allows the second groove 41 to be positioned closer to the second rounded corner 5. When the second groove 41 is formed, the material at the location of the second groove 41 is more easily squeezed to the second rounded corner 5, thus making the second groove 41 easier to form.

[0101] Of course, in addition to being located at the junction of the bottom wall 1 and the side wall 2, the second groove 41 can also be located on the inner surface of the bottom wall 1 or the side wall 2, without any specific limitation.

[0102] The groove depth h2 of the second groove 41 is an important parameter of the shell 10. h2 should not be too large or too small. If h2 is too large, the strength at the second corner 3 will decrease, and the second corner 3 will be prone to fracture under external force. If h2 is too small, when the second groove 41 is formed, there will be less material squeezed to the second fillet 5, resulting in a small reduction in the size of the second fillet 5. Research has found that when h2 = (0.125~0.1875)d2, the strength at the second corner 3 can be guaranteed while ensuring that the reduction in the size of the second fillet 5 is not too small. Here, d2 is the wall thickness of the bottom wall 1.

[0103] For example, when the wall thickness d2 of the bottom wall 1 is 0.8mm, the groove depth h2 of the second groove 41 should be set to 0.1~0.15mm. This ensures the strength at the second corner 3 and prevents the reduction of the second fillet 5 from being too small.

[0104] In some embodiments, such as Figure 9 As shown, the second structural part 4 also includes a second extrusion surface 42, which is located at the end of the side wall 2 away from the bottom wall 1. When the second extrusion surface 42 is formed, the side wall 2 is subjected to extrusion force and undergoes plastic deformation in the direction close to the bottom wall 1. A portion of the material of the side wall 2 is extruded to the second fillet 5, thereby further reducing the radius of the second fillet 5.

[0105] For example, the wall thickness of the side wall 2 is 0.8mm. By setting the second groove 41, the radius of the second rounded corner 5 can be reduced to less than 0.8mm, such as 0.45mm. By setting the second extrusion surface 42, the radius of the second rounded corner 5 can be further reduced, such as to 0mm (that is, the second rounded corner 5 is eliminated, and the bottom wall 1 and the side wall 2 are at a right angle).

[0106] The second extrusion surface 42 can be formed by a stamping process (such as a back extrusion process), but it is not limited to this. The first extrusion surface 252 can also be formed by an extrusion process. No specific limitation is made.

[0107] In some embodiments, such as Figure 8 and Figure 9As shown, the bottom wall 1, the vertical wall 22, and the inner folded wall 21 have the same wall thickness. For example, the wall thickness of the bottom wall 1, the vertical wall 22, and the inner folded wall 21 is 0.8 mm. This design ensures sufficient strength at the edge of the shell 10 (i.e., at the location of the side wall 2), preventing large deformation at the edge of the shell 10 under external force and ensuring the reliability of the shell 10 structure.

[0108] The manufacturing method of the shell 10 in some embodiments of this application will be described in detail below:

[0109] like Figure 10a and Figure 10b As shown, Figure 10a for Figure 8 A schematic diagram of the manufacturing process of the housing 10 shown. Figure 10a The bottom wall 1 and side wall 2 shown are for illustrative purposes only and are not shown to the actual scale of the product. Figure 10b for Figure 8 A flowchart illustrating the manufacturing process of the housing 10 is shown. The method for manufacturing the housing 10 includes:

[0110] S1, such as Figure 10a As shown in (2) and (3), the edge region 310 of the plate 300 is bent to form the side wall 2 of the shell 10, and the central region 320 of the plate 300 forms the bottom wall 1 of the shell 10.

[0111] The bending of the edge region 310 of the sheet metal 300 can be achieved by die stamping: such as Figure 10a As shown in (3), the sheet 300 is placed at the opening of the cavity of the first die 411. The shape of the cavity of the first die 411 matches the shape of the shell 10 to be formed. Then the first punch 412 presses the sheet 300 into the cavity of the first die 411. Under the pressure of the first punch 412, the edge area 310 of the sheet 300 is bent to form the side wall 2 of the shell 10.

[0112] In addition to bending through stamping, the edge area 310 of the sheet metal 300 can also be bent through sheet metal processing, such as bending on a bending machine.

[0113] Before bending the edge region 310 of the sheet material 300, the sheet material 300 needs to be pre-treated, for example, such as... Figure 10a As shown in (1), the corners of the board 300 are cut to form rounded corners.

[0114] After bending the edge region 310 of the sheet metal 300 to form the sidewall 2 of the shell 10, as Figure 10aAs shown in (4), the end of the side wall 2 away from the bottom wall 1 also needs to be cut to adjust the height of the side wall 2 to the design requirements.

[0115] S2, such as Figure 10a As shown in (5) and (6), the part of the side wall 2 away from the bottom wall 1 is bent inward to form an inner folded wall 21; the first corner 24 formed by the inner folded wall 21 and the vertical wall 22 is pressure processed to cause plastic deformation at the first rounded corner 23 located outside the first corner 24, so as to reduce the radius of the first rounded corner 23.

[0116] By performing pressure processing on the first corner 24 formed by the inner folded wall 21 and the vertical wall 22, the radius of the first fillet 23 can be reduced by replacing the time-consuming CNC milling process. This not only helps to shorten the manufacturing time of the housing 10 and improve the manufacturing efficiency of the housing 10, but also avoids leaving milling cutter marks on the outer surface of the housing 10.

[0117] In some embodiments, such as Figure 10a As shown in (5) in S2, the first corner 24 is subjected to pressure processing, including: extruding the inner side of the first corner 24 to form a first groove 251 extending circumferentially along the shell 10. Since the setting of the first groove 251 only causes local plastic deformation at the first corner 24, the impact on the structural integrity and structural strength of the sidewall 2 is relatively small.

[0118] In some embodiments, such as Figure 10a As shown in (5), while bending the portion of the sidewall 2 away from the bottom wall 1 inward, the inner side of the first corner 24 is pressed to form the first groove 251. By completing the bending of the sidewall 2 and the formation of the first groove 251 in one process, it is beneficial to save processes and further improve the manufacturing efficiency of the housing 10.

[0119] The inward bending of the portion of the sidewall 2 away from the bottom wall 1 and the first groove 251 can be formed in the following ways: Figure 10a As shown in (5), the housing 10 is placed in the third die 431, and then the first inner slider 432 is placed in the housing 10. The first inner slider 432 is provided with a first pressure rib 4321. The edge of the third die 431 is provided with a push slider 433. By pushing the push slider 433 towards the inside of the side wall 2, the part of the side wall 2 away from the bottom wall 1 (that is, the part of the side wall 2 that extends out of the third die 431) is bent inward to form an inner folded wall 21. At the same time as the side wall 2 is bent, the first inner slider 432 is pushed towards the vertical wall 22, so that the first pressure rib 4321 squeezes the inside of the first corner 24 to form a first groove 251.

[0120] Of course, the bending of the part of the side wall 2 away from the bottom wall 1 inward and the formation of the first groove 251 can be designed as two separate processes. For example, the part of the side wall 2 away from the bottom wall 1 can be bent inward to form the inner folded wall 21, and then the inner side of the first corner 24 can be squeezed to form the first groove 21.

[0121] In some embodiments, such as Figure 10a As shown in (6) of the diagram, the pressure processing at the first corner 24 in S2 further includes: after the first groove 251 is formed, clamping the vertical wall 22 to prevent plastic deformation of the vertical wall 22 in the thickness direction, and then punching (e.g., upsetting) or extruding the inner folded wall 21 along the direction close to the bottom wall 1 to reduce the radius of the first rounded corner 23, and forming a first extrusion surface 252 on the outer side of the inner folded wall 21. In this way, the inner folded wall 21 is subjected to extrusion force and undergoes plastic deformation in the direction close to the bottom wall 1, and a portion of the material on the outer side of the inner folded wall 21 is extruded to the first rounded corner 23, thereby further reducing the radius of the first rounded corner 23. By clamping the vertical wall 22, it is possible to avoid the vertical wall 22 from undergoing plastic deformation under pressure, which would cause wrinkles to appear on the vertical wall 22.

[0122] The inner folded wall 21 can be stamped or extruded in the following ways: such as Figure 10a As shown in (6), the housing 10 is placed in the fourth die 441, and the housing 10 is provided with a fourth punch 442. The fourth punch 442 and the fourth die 441 clamp the wall 22. The extrusion block 443 punches or extrudes the inner folded wall 21 in the direction close to the bottom wall 1, so that the inner folded wall 21 undergoes plastic deformation in the direction close to the bottom wall 1 until it abuts against the surface of the fourth punch 442. At this time, the first extrusion surface 252 is formed on the outer side of the inner folded wall 21.

[0123] It should be noted that when the inner folded wall 21 undergoes plastic deformation under pressure or extrusion, the first groove 251 serves to accommodate a portion of the material of the inner folded wall 21. In other words, when the inner folded wall 21 undergoes plastic deformation under pressure, a portion of the material of the inner folded wall 21 flows to the first groove 251 to fill a portion of the space in the first groove 251, thereby reducing the width of the first groove 251.

[0124] In some embodiments, such as Figure 11 As shown, Figure 11 for Figure 9 A schematic diagram of the manufacturing process of the housing 10 shown.

[0125] After bending the edge region 310 of the sheet metal 300 to form the sidewall 2 of the shell 10, as Figure 11As shown in (3) to (5), it also includes: performing pressure processing on the second corner 3 formed by the side wall 2 and the bottom wall 1, so that the second fillet 5 located outside the second corner 3 undergoes plastic deformation to reduce the radius of the second fillet 5. In this way, there is no need to set up a time-consuming CNC milling process to reduce the radius of the second fillet 5, which not only helps to shorten the manufacturing time of the housing 10 and improve the manufacturing efficiency of the housing 10, but also avoids leaving milling cutter marks on the outer surface of the housing 10.

[0126] In some embodiments, pressure processing is performed on the second corner 3, including: Figure 11 As shown in (3) to (5), the inner side of the second corner 3 is compressed to form a second groove 41 extending circumferentially along the shell 10. Since the setting of the second groove 41 only causes local plastic deformation at the second corner 3, the impact on the structural integrity and structural strength at the edge of the shell 10 is relatively small.

[0127] In some embodiments, bending the edge region 310 of the sheet 300 to form the sidewall 2 of the housing 10 and pressing the inner side of the second corner 3 to form a second groove 41 extending circumferentially along the housing 10 includes:

[0128] S11, such as Figure 11 As shown in (2) and (3), the edge region 310 of the plate 300 is bent inward at a predetermined angle to form a sidewall 2, and the inner side of the second corner 3 is squeezed to form a transition groove 43. The predetermined angle is less than 90°.

[0129] The bending of the edge region 310 of the sheet metal 300 and the formation of the transition groove 43 can be achieved by die stamping: such as Figure 11 As shown in (3), the sheet 300 is placed at the opening of the cavity of the fifth die 451. The shape of the cavity of the fifth die 451 matches the shape of the shell 10 to be formed. Then, the fifth punch 452 presses the sheet 300 into the cavity of the fifth die 451. The fifth punch 453 is provided with a second pressure rib 4531. Under the pressure of the fifth punch 453, the edge area 310 of the sheet 300 is bent to abut against the fifth punch 452 to achieve a preset bending angle. At the same time, the second pressure rib 4531 squeezes the inner side of the second corner 3 to form a transition groove 43.

[0130] In addition to bending through stamping, the edge area 310 of the sheet metal 300 can also be bent at a preset angle through sheet metal processing, such as bending on a bending machine.

[0131] Before bending the edge region 310 of the sheet material 300, the sheet material 300 needs to be pre-treated, for example, such as... Figure 11 As shown in (1), the corners of the board 300 are cut to form rounded corners.

[0132] S12, such as Figure 11 As shown in (4), after the transition groove 43 is formed, the sidewall 2 is bent inward to a preset position. The preset position can be a position where the sidewall 2 is perpendicular or approximately perpendicular to the bottom wall 1 (with a deviation within 5°), or other positions, which are not specifically limited here.

[0133] The second preset angle of inward bending of sidewall 2 can be achieved in the following ways: (e.g.) Figure 11 As shown in (4), the housing 10 with the sidewall 2 bent at a preset angle is placed in the sixth die 461. The sidewall 4611 of the sixth die 461 can slide relative to the bottom wall 4612 of the die. The sixth punch 462 is placed in the housing 10. Then, the sidewall 4611 of the die is slid towards the inside of the sidewall 2 to push the sidewall 2 to bend until it abuts against the sixth punch 462, thereby realizing the sidewall 2 being bent to the preset position.

[0134] Of course, the method of bending the side wall 2 to the preset position is not limited to the above method. The side wall 2 can also be bent to the preset position through sheet metal processing, such as bending on a bending machine.

[0135] S13, such as Figure 11 As shown in (5), the transition groove 43 is pressed to form the second groove 41.

[0136] When the second groove 41 is formed, the material at the position of the transition groove 43 will be squeezed from the inside of the second corner 3 to the position of the second rounded corner 5, thereby further reducing the radius of the second rounded corner 5.

[0137] The second groove 41 can be implemented in the following way: such as Figure 11 As shown in (5), the housing 10 is placed in the seventh cavity 471, and then the third inner slider 472 is placed in the housing 10. The third inner slider 472 is provided with a third pressure rib 4721. Then, the third inner slider 472 is pushed towards the bottom wall 1 so that the third pressure rib 4721 presses against the position of the transition groove 43 to form the second groove 41.

[0138] Compared to bending the side wall 2 once to achieve the preset position, and setting the second groove 41 at the second corner 3, Figure 11 The embodiment shown is to bend the sidewall 2 twice to reach the preset position and form the second groove 41 by two compressions. This design can avoid excessive plastic deformation at the second corner 3 to form wrinkles on the outer surface of the second corner 3, thereby ensuring the smoothness of the appearance at the second corner 3.

[0139] Wherein, after the second groove 41 is formed, as Figure 11 As shown in (6), the end of the side wall 2 away from the bottom wall 1 also needs to be cut to adjust the height of the side wall 2 to the design requirements.

[0140] In step S11, the preset angle (i.e., the angle of the first bend of sidewall 2) should not be too large or too small. If the preset angle is too large, the amount of plastic deformation at the second corner 3 will still be large, which is not conducive to keeping the outer surface of the second corner 3 flat. If the preset angle is too small, the angle of the second bend of sidewall 2 will be too large, which will also result in a large amount of plastic deformation at the second corner 3, which is also not conducive to keeping the outer surface of the second corner 3 flat. Research has found that when the preset angle is in the range of 45°~70°, it can ensure that the amount of plastic deformation at the second corner 3 is relatively small during each bend of sidewall 2, thereby ensuring the flatness of the outer surface of the second corner 3.

[0141] Further research revealed that a preset angle of 70° better ensures the flatness of the outer surface of the second corner 3.

[0142] In some embodiments, such as Figure 11 As shown in (7), the pressure processing at the second corner 3 further includes: after the second groove 41 is formed, clamping the sidewall 2 to prevent plastic deformation of the sidewall 2 in the thickness direction, and then punching (e.g., back extrusion) or extruding the end of the sidewall 2 away from the bottom wall 1 along the direction close to the bottom wall 1 to reduce the radius of the second fillet 5, and forming a second extrusion surface 42 at the end of the sidewall 2 away from the bottom wall 1. In this way, the sidewall 2 is subjected to extrusion force and undergoes plastic deformation in the direction close to the bottom wall 1, and a part of the material of the sidewall 2 is extruded to the second fillet 5, thereby further reducing the radius of the second fillet 5. By clamping the sidewall 2, it is possible to avoid the sidewall 2 from undergoing plastic deformation under pressure, which would cause wrinkles on the sidewall 2.

[0143] The side wall 2 can be stamped or extruded in the following ways: such as Figure 11 As shown in (7), the housing 10 is placed in the eighth die 481. The housing 10 is provided with an eighth punch 482. The eighth punch 482 and the eighth die 481 clamp the side wall 2. The pressure block punches or squeezes the end of the side wall 2 away from the bottom wall 1 in the direction close to the bottom wall 1, so that the side wall 2 undergoes plastic deformation in the direction close to the bottom wall 1, thereby reducing the radius of the second fillet 5.

[0144] Figure 11 Figures (8) and (9) show the formation process of the inner folded wall 21 and the first structural part 25, specifically related to... Figure 10aThe processes in (5) and (6) are the same, and will not be repeated here.

[0145] In some embodiments, such as Figure 2 and Figure 4 As shown, after S2 is completed, a portion of the sidewall 2 is removed along the circumference of the housing 10 to form a clearance notch 8 for mounting the display screen 200.

[0146] The clearance notch 8 can be formed by milling or cutting, and no specific limitation is made here.

[0147] In some embodiments, after S2 is completed, the manufacturing method of the housing 10 further includes: grinding, sandblasting, anodizing and laser engraving the housing 10.

[0148] Grinding involves removing burrs and other uneven structures from the housing 10. Additionally, the first rounded corner 23 and the second rounded corner 5 can be ground to reduce their radii.

[0149] Sandblasting uses the impact of high-speed sand flow to clean and roughen the surface of the housing 10, giving the surface of the housing 10 a certain degree of cleanliness and different roughness, thereby improving the mechanical properties of the surface of the housing 10. This improves the fatigue resistance of the housing 10, increases its adhesion to the coating, and extends the durability of the coating.

[0150] Anodizing (also known as electrochemical coloring) is the process of coloring the surface of the shell 10. Specifically, the surface of the shell 10 is anodized or plated, and then the oxide film or plating on the surface of the shell 10 is colored by the electric field during electrolysis.

[0151] Laser engraving uses CNC technology as a basis and laser as a processing medium to engrave text or patterns on the shell 10. The engraved patterns or text have no scratches, the surface of the shell 10 remains smooth, and the engraved text or patterns will not wear off.

[0152] like Figure 12 , Figure 13 and Figure 14 As shown, Figure 12 This is a schematic diagram of the structure of a tablet computer in some embodiments of this application. Figure 13 for Figure 12 A magnified view of part A in the middle. Figure 14 for Figure 13The figure shows a BB cross-sectional view. In this embodiment, the terminal device is a tablet computer. The tablet computer includes a housing 10, a frame 500, and a display panel 600. The frame 500 is disposed in the housing 10, and a part of the frame 500 extends out of the housing 10. The frame 500 is provided with a positioning step 510, and the edge of the display panel 600 is disposed at the positioning step 510.

[0153] The display panel 600 can be fixed to the positioning step 510 by adhesive bonding, but it is not limited to this method. It can also be fixed to the positioning step 510 by snap-fit ​​or other means.

[0154] The housing 10 includes a bottom wall 1 and a side wall 2 bent at the edge of the bottom wall 1, the portion of the side wall 2 away from the bottom wall 1 being bent inward to form an inner folded wall 21.

[0155] The specific configuration of the first structural part 25 and the second structural part 4 can be referred to the description in the laptop computer embodiment, and will not be repeated here. For example, Figure 14 As shown, the housing 10 is provided with a first structural part 25, which includes a first groove 251 and a first extrusion surface 252. The first groove 251 is located on the inner side of the first corner 24 and extends along the circumference of the housing 10. The first extrusion surface 252 is located on the outer side of the inner folded wall 21 and is connected to the first rounded corner 23.

[0156] In some embodiments, such as Figure 14 As shown, a chamfer 26 is provided on the outer side of the first corner 24 formed by the inner folded wall 21 and the upright wall 22 to cut off the first rounded corner 23. The dashed line in the figure shows the outline before the first rounded corner 23 is cut off. By setting the chamfer 26, the housing 10 can be well connected to the frame 500, avoiding the formation of a step at the joint between the frame 500 and the inner folded wall 21, which would affect the appearance of the tablet computer.

[0157] like Figure 14 As shown, an opening 221 is provided on the vertical wall 22. This opening 221 may or may not penetrate the vertical wall 22; no specific limitation is made here. This opening 221 may be a sound outlet (such as...). Figure 11 As shown in the figure, it can also be a plug for external devices (such as a charging port), and no specific limitation is made here. Since the above-mentioned opening 221 is located on the vertical wall 22, the structure of the housing 10 is relatively weak at the location of the opening 221, with low strength and rigidity, and poor resistance to bending.

[0158] Therefore, in some embodiments, such as Figure 14As shown, the inner folded wall 21 is positioned at the opening 221 along the circumference of the shell 10. This design increases the strength of the shell 10 at the opening 221, significantly increasing its rigidity and bending resistance. In a scenario where the shell 10 is made of 5052-H32 aluminum alloy, and the bottom wall 1 and vertical wall 22 have a thickness of 0.8 mm, while the inner folded wall 21 has a thickness of 0.65 mm, the rigidity gain of the shell 10 by placing the inner folded wall 21 at the opening 221 increases by more than 15%.

[0159] The inner folded wall 21 can be provided in a part of the vertical wall 22 or in the entire vertical wall 22 along the circumference of the shell 10, without specific limitation. When the inner folded wall 21 is provided in a part of the vertical wall 22, the inner folded wall 21 in other areas of the vertical wall 22 can be milled off by means of milling or the like.

[0160] In some embodiments, such as Figure 14 As shown, the frame 500 is provided with a relief groove 520 for the inner folded wall 21 to extend into. With this design, the groove wall of the relief groove 520 restricts the deformation of the inner folded wall 21, thereby further improving the rigidity and bending resistance of the shell 10.

[0161] The manufacturing method of the casing 10 in the tablet computer can be referred to the manufacturing method of the casing 10 in the embodiment of the laptop computer, and will not be repeated here.

[0162] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0163] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A housing, characterized in that, It includes a bottom wall and a side wall that is bent and connected to the edge of the bottom wall. The portion of the side wall away from the bottom wall is bent inward to form an inner folded wall. The portion of the side wall between the inner folded wall and the bottom wall is a vertical wall. At the first corner formed by the inner folded wall and the vertical wall, a first structural part formed by pressure processing is provided. The first structural part includes a first groove, which is disposed on the inner side of the first corner and extends along the circumference of the shell. The pressure processing includes: after the first groove is formed, the inner folded wall is punched or squeezed so that a portion of the material on the outer side of the inner folded wall is squeezed to a first rounded corner located on the outer side of the first corner, so as to reduce the radius of the first rounded corner.

2. The housing according to claim 1, characterized in that, The first structural part includes a first extrusion surface, which is located on the outside of the inner folded wall and is connected to the first rounded corner.

3. The housing according to claim 2, characterized in that, The first groove is located at the junction of the vertical wall and the inner folded wall.

4. The housing according to claim 3, characterized in that, The wall thickness of the vertical wall is d1, and the groove depth of the first groove is h1, where h1 = (0.125~0.1875)d1.

5. The housing according to any one of claims 1 to 4, characterized in that, The second corner formed by the sidewall and the bottom wall is provided with a second structural part formed by pressure processing, so that the second rounded corner located outside the second corner undergoes plastic deformation to reduce the radius of the second rounded corner.

6. The housing according to claim 5, characterized in that, The second structural part includes a second groove and / or a second extrusion surface. The second groove is disposed on the inner side of the second corner and extends circumferentially along the housing. The second extrusion surface is located at the end of the side wall away from the bottom wall.

7. The housing according to any one of claims 1 to 6, characterized in that, The bottom wall, the vertical wall, and the inner folded wall have the same wall thickness.

8. The housing according to any one of claims 1 to 7, characterized in that, An opening is provided on the vertical wall, and the inner folded wall is located at the opening along the circumference of the shell.

9. A terminal device, characterized in that, The housing includes any one of claims 1 to 8.

10. The terminal device according to claim 9, characterized in that, The terminal device also includes a frame, which is disposed in the housing and a portion of the frame extends out of the housing. The frame is provided with a clearance groove for the inner folded wall to extend into.

11. A method for manufacturing a shell, characterized in that, include: The edge regions of the sheet metal are bent to form the sidewalls of the housing, and the central region of the sheet metal forms the bottom wall of the housing; The portion of the sidewall away from the bottom wall is bent inward to form an inner folded wall, wherein the portion of the sidewall located between the inner folded wall and the bottom wall is a vertical wall; Pressure processing is applied to the first corner formed by the inner folded wall and the vertical wall to cause plastic deformation at the first rounded corner located outside the first corner, thereby reducing the radius of the first rounded corner; Performing pressure processing on the first corner includes: The inner side of the first corner is pressed to form a first groove extending circumferentially along the housing; After the first groove is formed, the vertical wall is clamped to prevent plastic deformation of the vertical wall in the thickness direction. Then, the inner folded wall is punched or extruded along the direction close to the bottom wall to reduce the radius of the first rounded corner and form a first extrusion surface on the outer side of the inner folded wall.

12. The method for manufacturing the shell according to claim 11, characterized in that, While bending the portion of the sidewall away from the bottom wall inward, the inner side of the first corner is squeezed to form the first groove.

13. The method for manufacturing the shell according to claim 11 or 12, characterized in that, After bending the edge region of the sheet metal to form the sidewalls of the housing, the process further includes: Pressure processing is performed on the second corner formed by the sidewall and the bottom wall to cause plastic deformation at the second rounded corner located outside the second corner, thereby reducing the radius of the second rounded corner.

14. The method for manufacturing the shell according to claim 13, characterized in that, The second corner is subjected to pressure processing, including: The inside of the second corner is pressed to form a second groove extending circumferentially along the housing.

15. The method for manufacturing the shell according to claim 14, characterized in that, The pressure processing of the second corner also includes: After the second groove is formed, the sidewall is clamped to prevent plastic deformation of the sidewall in the thickness direction. Then, along the direction close to the bottom wall, the end of the sidewall away from the bottom wall is stamped or extruded to reduce the radius of the second fillet and form a second extrusion surface at the end of the sidewall away from the bottom wall.

16. The method for manufacturing the shell according to claim 14 or 15, characterized in that, The edge region of the sheet metal is bent to form the sidewall of the housing, and the inner side of the second corner is pressed to form a second groove extending circumferentially along the housing, including: The edge area of ​​the plate is bent inward at a predetermined angle to form the sidewall, and then the inner side of the second corner is squeezed to form a transition groove; wherein the predetermined angle is less than 90°; The sidewall is further bent inward to a preset position, and the position of the transition groove is squeezed to form a second groove.

Images