Electronic device bottom shell and electronic device

Abstract

The utility model discloses an electronic equipment bottom shell and electronic equipment, electronic equipment bottom shell is equipped with integrated forming piece and includes rear cover and middle frame, and the inside round corner and the outside round corner are separately arranged on the inside and outside of electronic equipment bottom shell, and the inside round corner and the outside round corner all are bent and extend from the rear cover to the middle frame to form the bending corner part, and the radius of the inside round corner is greater than or equal to 3mm, and the radius of the outside round corner is less than or equal to 1.5mm, so that the material quality is unified, and there is no touch jump when holding, and the assembly gap between the rear cover and the middle frame is eliminated, and at the same time, the outside round corner adopts the small R angle with the radius of the arc less than or equal to 1.5mm, so that the outside corner of the rear cover and the middle frame is close to the right angle to ensure the appearance simplicity, and the inside round corner adopts the big R angle with the radius of the arc greater than or equal to 3mm, so that the corner thickness of the rear cover and the middle frame is improved, the impact resistance is improved, the breaking phenomenon when falling is avoided, and the inside round corner also plays the role of facilitating processing.

Description

Technical Field

[0001] This utility model belongs to the field of electronic equipment technology, specifically relating to an electronic equipment base shell and an electronic equipment. Background Technology

[0002] With the continuous development of electronic technology, digital products are becoming increasingly integrated into people's lives. In particular, mobile phones, tablets, and electronic watches are playing an increasingly important role in our daily lives. For these products, people not only pay attention to their practicality, but also increasingly focus on their feel and appearance.

[0003] For example, most current mobile phones use a sandwich-style structure of "front glass - metal frame - back glass" or an integrated glass structure for the back cover and frame. In the sandwich-style structure, the glass and metal are not of the same material, resulting in significant differences in thermal conductivity and surface roughness. This can cause a jump in tactile sensation between "cold and hard" and "warm and smooth," affecting the continuity of the feel. The gaps between the frame and the front and back covers are prone to trapping dirt and grime. The corners of the split structure are areas where multiple materials meet; during a drop, stress tends to concentrate at the gaps or material interfaces, leading to a high risk of breakage. In traditional designs, the corner thickness of the integrated glass structure for the back cover and frame is insufficient, similar to the flat area of ​​the back cover, resulting in limited impact resistance and a risk of breakage during drops. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies, this utility model provides an electronic device housing and an electronic device, aiming to solve at least one of the above-mentioned technical problems.

[0005] To achieve the above objectives, this utility model provides an electronic device bottom shell, wherein the electronic device bottom shell is a one-piece molded part and includes a back cover and a middle frame. The electronic device bottom shell has inner rounded corners and outer rounded corners on its inner and outer sides, respectively. Both the inner and outer rounded corners are bent and extended from the back cover to the middle frame to form a bent corner. The radius of the arc of the inner rounded corner is set to be greater than or equal to 3mm, and the radius of the arc of the outer rounded corner is set to be less than or equal to 1.5mm.

[0006] In one embodiment of this utility model, the radius of the inner rounded corner is set to be greater than or equal to 5 mm and / or less than or equal to 10 mm.

[0007] In one embodiment of this utility model, the radius of the outer rounded corner is set to 1mm~1.2mm.

[0008] In one embodiment of this utility model, the first end of the inner rounded corner is configured to be horizontally connected to the inner plane of the back cover, and the second end is configured to extend to the outer edge of the middle frame. The first included angle between the tangent of the second end of the inner rounded corner and the plane where the outer edge is located is set as an acute angle.

[0009] In one embodiment of this utility model, the first included angle is set to be less than or equal to 80° and / or greater than or equal to 70°.

[0010] In one embodiment of this utility model, the first end of the outer rounded corner is configured to be horizontally connected to the outer plane of the back cover, and the second end is configured to be horizontally connected to the outer plane of the middle frame. The included angle between the outer plane of the back cover and the outer plane of the middle frame is set to 88°~92° or 90°.

[0011] In one embodiment of this utility model, the second included angle between the first center line of the outer rounded corner and the second center line of the inner rounded corner is set to 4°~8°, and the second center line is located on the side of the first center line close to the inner plane of the back cover. The first center line is set as the line connecting the midpoint of the arc length of the outer rounded corner and the center of the outer rounded corner, and the second center line is set as the line connecting the midpoint of the arc length of the inner rounded corner and the center of the inner rounded corner.

[0012] In one embodiment of this utility model, the difference between the thickness of the planar area of ​​the back cover and the minimum thickness of the middle frame is set to be within the range of 0.1 mm.

[0013] In one embodiment of this utility model, the strength of the bending corner is set to be greater than or equal to 750 MPa, and / or the fracture toughness of the bending corner is set to be greater than or equal to 5 MPa·m. 1 / 2 .

[0014] In one embodiment of this utility model, the integrally molded part is a glass part.

[0015] In one embodiment of this utility model, the maximum thickness of the bent corner is set to 3 to 5 times the thickness of the planar area of ​​the back cover.

[0016] To achieve the above objectives, a second aspect of this utility model provides an electronic device, wherein the electronic device includes a base shell according to the above description.

[0017] Through the above technical solution, the electronic device bottom shell provided by this utility model embodiment has the following beneficial effects:

[0018] When using the aforementioned electronic device bottom shell, because it is designed as a one-piece molded component including a back cover and a middle frame, the bottom shell has inner and outer rounded corners on both the inner and outer sides. Both the inner and outer rounded corners extend from the back cover to the middle frame to form a bent corner. The radius of the inner rounded corner is greater than or equal to 3mm, and the radius of the outer rounded corner is less than or equal to 1.5mm. This difference in the radius R values ​​between the outer and inner rounded corners results in a gradual increase in thickness from the back cover to the middle of the bent corner, and a gradual decrease in thickness from the middle of the bent corner to the outer edge of the middle frame. Compared to a sandwich-style split structure, this design achieves uniform material consistency, with no difference in thermal conductivity or surface roughness, and eliminates any tactile feedback when holding the device. The design eliminates the assembly gap between the back cover and the middle frame, and there is no material joint at the corners. Compared with the traditional design of an integrated glass structure for the back cover and middle frame, which results in insufficient corner thickness due to the consistent R value of the inner and outer corners, the bending corner of this utility model significantly increases the corner thickness, thereby improving impact resistance and preventing breakage upon drop. At the same time, the outer rounded corner uses a small R angle with a radius of less than or equal to 1.5mm, which makes the outer corners of the back cover and middle frame close to right angles, ensuring a simple appearance. The inner rounded corner uses a large R angle with a radius of greater than or equal to 3mm, which increases the corner thickness of the back cover and middle frame, thereby improving strength. The large inner R angle design also facilitates processing.

[0019] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the bottom shell of an electronic device according to an embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional structural diagram of the bottom shell of an electronic device according to an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the first included angle and the second included angle according to an embodiment of the present invention;

[0024] Figure 4 This is a structural schematic diagram of the processing flow of the bottom shell of an electronic device according to an embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 100, back cover; 200, middle frame; 300, inner rounded corner; 400, outer rounded corner; β, first included angle; γ, second included angle. Detailed Implementation

[0027] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0028] The electronic device base and electronic device of this utility model are described below with reference to the accompanying drawings.

[0029] like Figure 1 and Figure 2 As shown, this utility model provides an electronic device bottom shell, wherein the electronic device bottom shell is a one-piece molded part and includes a back cover 100 and a middle frame 200. The electronic device bottom shell has an inner rounded corner 300 and an outer rounded corner 400 on its inner and outer sides respectively. The inner rounded corner 300 and the outer rounded corner 400 both bend and extend from the back cover 100 to the middle frame 200 to form a bent corner. The radius of the arc of the inner rounded corner 300 is set to be greater than or equal to 3mm, and the radius of the arc of the outer rounded corner 400 is set to be less than or equal to 1.5mm.

[0030] When using the aforementioned electronic device bottom shell, since it is designed as a one-piece molded component including a back cover 100 and a middle frame 200, the electronic device bottom shell has inner rounded corners 300 and outer rounded corners 400 on its inner and outer sides respectively. Both the inner rounded corners 300 and outer rounded corners 400 extend from the back cover 100 to the middle frame 200 to form a bent corner. The radius of the arc of the inner rounded corner 300 is set to be greater than or equal to 3mm, and the radius of the arc of the outer rounded corner 400 is set to be less than or equal to 1.5mm. That is, there is a difference in the radius R value between the outer rounded corner 400 and the inner rounded corner 300, which causes the thickness to gradually increase from the back cover 100 to the middle section of the bent corner and gradually decrease from the middle section of the bent corner to the outer edge of the middle frame 200. Compared with a sandwich-type split structure, the material is uniform, and there is no difference in thermal conductivity and surface roughness. The design eliminates any tactile feedback and removes the assembly gap between the back cover 100 and the middle frame 200, with no material joints at the corners. Compared to the traditional design of an integrated glass structure for the back cover 100 and the middle frame 200, which suffers from insufficient corner thickness due to the consistent R-value of the inner and outer corners, the bent corners in this invention significantly increase the corner thickness, thereby enhancing impact resistance and preventing breakage upon drop. Furthermore, the outer rounded corner 400 uses a small R-angle with a radius less than or equal to 1.5mm, ensuring that the outer corners of the back cover 100 and the middle frame 200 are close to right angles, maintaining a minimalist appearance. The inner rounded corner 300 uses a large R-angle with a radius greater than or equal to 3mm, increasing the corner thickness of the back cover 100 and the middle frame 200, thus improving strength. The large inner R-angle design also facilitates subsequent polishing.

[0031] It should be noted that the bottom shell of the electronic device is designed to have an inner rounded corner of 300° formed by integral bending of a sheet of equal thickness, and an outer rounded corner of 400° formed by CNC machining. Specifically, it can be prefabricated... Figure 4 (a) shows a one-piece molded sheet of equal thickness; the bottom shell of the electronic device can be formed by bending the sheet of equal thickness to create an inner rounded corner of 300° with a radius of curvature greater than or equal to 3mm, specifically as follows: Figure 4 As shown in (b); finally, the outer contour of the electronic device's bottom shell is machined using CNC technology to form an outer corner radius of 400° with a radius less than or equal to 1.5mm, as shown in the details. Figure 4 As shown in (c). This achieves the goal of improving processing accuracy. Of course, this utility model is not limited to this; the bottom shell of electronic devices can also be made by integral pressing or integral casting.

[0032] In one embodiment of this utility model, the radius of the inner rounded corner 300 is set to be greater than or equal to 5 mm and / or less than or equal to 10 mm. Further limiting the radius of the inner rounded corner 300 to greater than or equal to 5 mm further expands the difference from the outer rounded corner 400, resulting in a larger area of ​​uneven thickness at the corner, thus further improving strength. Simultaneously, it further expands the inner operating space of the electronic device's bottom casing at the corner, allowing polishing tools (such as soft grinding wheels) to reach into the corner area for uniform polishing, increasing polishing efficiency from 60% for traditional small radius corners to 95%. Furthermore, limiting the radius of the inner rounded corner 300 to less than or equal to 10 mm avoids the phenomenon of poor appearance due to excessive corner thickness.

[0033] In one embodiment of this utility model, the radius of the outer rounded corner 400 is set to 1mm~1.2mm. By further reducing the radius of the outer rounded corner 400 and limiting the minimum value, the outer corners of the back cover 100 and the middle frame 200 can be made closer to right angles or right angles while ensuring ergonomic tactile comfort.

[0034] See Figures 1 to 3 In one embodiment of this utility model, the first end of the inner rounded corner 300 is horizontally connected to the inner plane of the back cover 100, and the second end extends to the outer edge of the middle frame 200. The first included angle β between the tangent of the second end of the inner rounded corner 300 and the plane containing the outer edge is set as an acute angle. That is, the middle frame 200 is of unequal thickness throughout its entire height direction, specifically, the thickness gradually decreases from the corner position towards the outer edge of the middle frame 200. In addition, setting the first included angle β as an acute angle, that is, the arc of the inner rounded corner 300 is less than 1 / 4 of the circumference, can also make it easier for polishing tools to reach into the corner area for uniform polishing.

[0035] In one embodiment of this utility model, the first included angle β is set to be less than or equal to 80° and / or greater than or equal to 70°. Limiting the maximum value of the first included angle β to 80° can further reduce the processing difficulty, and limiting the minimum value of the first included angle β to 70° can reduce the difficulty of bonding the electronic device's bottom shell to the battery and battery components.

[0036] In one embodiment of this utility model, the first end of the outer rounded corner 400 is horizontally connected to the outer plane of the back cover 100, and the second end is horizontally connected to the outer plane of the middle frame 200. The included angle between the outer plane of the back cover 100 and the outer plane of the middle frame 200 is set to 88°~92° or 90°. This allows the outer planes where the two ends of the outer rounded corner 400 meet to be nearly vertical or vertically set, ensuring a right-angle appearance and giving the outer edge of the body a "sharp" right-angle contour, which is particularly suitable for the minimalist style of high-end models.

[0037] See Figures 1 to 3 In one embodiment of this utility model, the second included angle γ between the first center line of the outer rounded corner 400 and the second center line of the inner rounded corner 300 is set to 4°~8°, and the second center line is located on the side of the first center line closer to the inner plane of the back cover 100. The first center line is defined as the line connecting the midpoint of the arc length of the outer rounded corner 400 and the center of the outer rounded corner 400, and the second center line is defined as the line connecting the midpoint of the arc length of the inner rounded corner 300 and the center of the inner rounded corner 300. This design can match the processing flow of the electronic device's bottom shell, facilitating process forming.

[0038] In one embodiment of this utility model, the difference between the thickness of the planar area of ​​the back cover 100 and the minimum thickness of the middle frame 200 is set within 0.1mm, ensuring that the thicknesses of the two are basically the same to guarantee a better appearance. Specifically, the thickness of the planar area of ​​the back cover 100 is the distance between the outer plane and the inner plane of the back cover 100. Since the thickness gradually decreases from the corner position towards the outer edge of the middle frame 200, the minimum thickness of the middle frame 200 is the end of the middle frame 200 away from the corner position.

[0039] In one embodiment of this utility model, the strength of the bending corner is set to be greater than or equal to 750 MPa, and / or the fracture toughness of the bending corner is set to be greater than or equal to 5 MPa·m. 1 / 2 By separately limiting the strength and fracture toughness of the bending corner, i.e., the radius (R-angle) of the electronic device's base, the product can be guaranteed to meet usage requirements.

[0040] In one embodiment of this invention, the one-piece molded part is a glass part. The uniform material properties of glass ensure that the thermal conductivity and surface roughness of the body surface are basically consistent, resulting in a smooth, non-jumping feel when held. Specifically, the bottom shell of the electronic device can be made of ordinary glass, high-alumina-silicon glass, microcrystalline glass, or composite glass, etc.

[0041] In one embodiment of this utility model, the maximum thickness of the bent corner is set to 3 to 5 times the thickness of the planar area of ​​the back cover 100, so that the corner strength meets the standard while also having a good appearance.

[0042] Therefore, by unifying the glass material, differentiating the R-values ​​of the inner and outer corners, and using a hot bending-CNC composite process, this utility model achieves comprehensive optimization of the electronic device body in terms of appearance simplicity, tactile consistency, drop resistance, and processing efficiency. It conforms to the technological trend of high-end smartphones evolving towards "borderless aesthetics" and "ultimate experience," and has significant market application value.

[0043] Furthermore, this utility model also provides an electronic device, wherein the electronic device includes the electronic device housing according to the above-described embodiments. Since the electronic device adopts all the technical solutions of the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. Specifically, the electronic device may include, but is not limited to, a mobile phone.

[0044] In the description of this utility model, it should be understood that 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A bottom casing for an electronic device, characterized in that, The bottom shell of the electronic device is a one-piece molded part and includes a back cover (100) and a middle frame (200). The bottom shell of the electronic device is provided with an inner rounded corner (300) and an outer rounded corner (400) on the inner and outer sides respectively. The inner rounded corner (300) and the outer rounded corner (400) are both bent and extended from the back cover (100) to the middle frame (200) to form a bent corner. The radius of the arc of the inner rounded corner (300) is set to be greater than or equal to 3mm, and the radius of the arc of the outer rounded corner (400) is set to be less than or equal to 1.5mm.

2. The electronic device base shell according to claim 1, characterized in that, The radius of the inner fillet (300) is set to be greater than or equal to 5 mm and / or less than or equal to 10 mm; And / or, the radius of the outer fillet (400) is set to 1mm~1.2mm.

3. The electronic device base shell according to claim 1, characterized in that, The first end of the inner rounded corner (300) is configured to be horizontally connected to the inner plane of the back cover (100), and the second end is configured to extend to the outer edge of the middle frame (200). The first included angle (β) between the tangent of the second end of the inner rounded corner (300) and the plane where the outer edge is located is set to an acute angle.

4. The electronic device base shell according to claim 3, characterized in that, The first included angle (β) is set to be less than or equal to 80° and / or greater than or equal to 70°.

5. The electronic device base shell according to claim 1, characterized in that, The first end of the outer rounded corner (400) is configured to be horizontally connected to the outer plane of the back cover (100), and the second end is configured to be horizontally connected to the outer plane of the middle frame (200). The included angle between the outer plane of the back cover (100) and the outer plane of the middle frame (200) is set to 88°~92° or 90°.

6. The electronic device base shell according to claim 5, characterized in that, The second included angle (γ) between the first center line of the outer rounded corner (400) and the second center line of the inner rounded corner (300) is set to 4°~8°, and the second center line is located on the side of the first center line closer to the inner plane of the back cover (100). The first center line is set as the line connecting the midpoint of the arc length of the outer rounded corner (400) and the center of the outer rounded corner (400), and the second center line is set as the line connecting the midpoint of the arc length of the inner rounded corner (300) and the center of the inner rounded corner (300).

7. The electronic device base shell according to claim 1, characterized in that, The difference between the thickness of the planar area of ​​the back cover (100) and the minimum thickness of the middle frame (200) is set to be within 0.1 mm.

8. The electronic device base shell according to claim 1, characterized in that, The strength of the bending corner is set to be greater than or equal to 750 MPa, and / or the fracture toughness of the bending corner is set to be greater than or equal to 5 MPa·m. 1 / 2 ; And / or, the integrally molded part is a glass part.

9. The electronic device housing according to any one of claims 1 to 8, characterized in that, The maximum thickness of the bent corner is set to 3 to 5 times the thickness of the planar area of ​​the back cover (100).

10. An electronic device, characterized in that, The electronic device includes an electronic device housing according to any one of claims 1 to 9.

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