A protective shell

Abstract

The utility model discloses an electronic equipment accessory technical field, disclose a protective housing, the protective housing includes: composite backboard and side frame, and composite backboard and side frame are connected and enclose and form the accommodation cavity for accommodating electronic equipment, composite backboard includes substrate main part and first substrate, and first substrate is connected in substrate main part one side away from the accommodation cavity, and the periphery of first substrate is equipped with first arc edge part, and first arc edge part is curved and extends to form towards the side where the accommodation cavity is, and the periphery of substrate main part is equipped with the second arc edge part of first arc edge part bonding connection. The utility model discloses through setting up the first arc edge part, second arc edge part of mutual bonding respectively at the periphery of first substrate, substrate main part, make the composite backboard with the junction of side frame formed a smooth transition arc surface, increased the contact area of composite substrate and the edge of side frame junction palm web space, eliminated the protective housing's feeling of being jammed, realized the qualitative leap of holding comfort degree.

Description

Technical Field

[0001] This utility model relates to the field of electronic device accessories technology, specifically to a protective case. Background Technology

[0002] With the widespread use of smartphones, tablets, and other electronic devices, protective cases have become an indispensable accessory, protecting these devices from scratches, impacts, and other damage. The connection between the back panel and side frame of a protective case is typically a rounded chamfer. In current technology, this chamfer is usually located on the side frame. However, because the side frame and back panel are almost perpendicular, and the chamfer on the side frame usually needs to be placed at this right angle, the radius of the chamfer on the side frame is often quite small. This results in a small contact area between the palm and the chamfer of the protective case when holding it, leading to concentrated pressure and a noticeable "gripping" sensation, severely impacting the user experience. Summary of the Invention

[0003] In view of the above problems, this utility model provides a protective case to solve the problem of poor transition structure design at the connection between the back panel and the side frame of traditional protective cases, which leads to the edge being uncomfortable to hold and poor grip comfort.

[0004] According to one aspect of the present invention, a protective shell is provided, the protective shell including a composite back plate and a side frame, the composite back plate and the side frame being connected to enclose and form a side frame for accommodating a cavity for accommodating an electronic device. The composite backplate includes a substrate body and a first substrate. The first substrate is connected to the side of the substrate body away from the accommodating cavity. The periphery of the first substrate is provided with a first arc edge portion, which is formed by bending and extending towards the side where the accommodating cavity is located. The periphery of the substrate body is provided with a second arc edge portion, which is fitted and connected to the first arc edge portion.

[0005] In one alternative approach, the radius of curvature of the first arc edge is greater than the thickness of the composite backplate.

[0006] In one alternative, the outer side of the first substrate away from the accommodating cavity includes a first planar portion and a first curved portion, the first curved portion being located between the first arc edge portion and the first planar portion and respectively connecting the first arc edge portion and the first planar portion; In the thickness direction of the composite back plate, the inner side surface of the substrate body corresponding to the first curved surface is planar, and / or the curvature of the first curved surface is less than the curvature of the first arc edge.

[0007] In one alternative embodiment, the composite backplate further includes a second substrate connected to the substrate body on the side near the receiving cavity, and the second substrate is flat.

[0008] In one alternative embodiment, the second substrate has a first filling groove on the side facing the accommodating cavity; The side frame protrudes from the side away from the receiving cavity to form a first filling portion, which is embedded in the first filling groove.

[0009] In one alternative embodiment, the peripheral side surface of the first substrate is flush with the wall surface of the first filling groove and is connected to the first filling portion. And / or, along the thickness direction of the composite backing, the side plane of the first filling portion away from the substrate body protrudes into the accommodating cavity, so that there is a height difference between the side plane of the first filling portion away from the substrate body and the side plane of the second substrate near the accommodating cavity.

[0010] In one alternative embodiment, the second arcuate portion has a stepped portion on the side away from the receiving cavity, and the stepped portion is connected to the peripheral side of the first arcuate portion on the side facing the first arcuate portion.

[0011] In one alternative embodiment, the side frame is provided with a third arcuate edge portion, which is connected to the first arcuate edge portion. A corner space is formed between the surface of the third arc-shaped portion away from the receiving cavity and the surface of the first arc-shaped portion away from the receiving cavity, and the corner space is recessed toward the side where the receiving cavity is located; and / or, the curvature of the third arc-shaped portion is less than the curvature of the first arc-shaped portion.

[0012] In one alternative embodiment, the outer side of the side frame away from the accommodating cavity is provided with a second curved surface, the second curved surface being connected to the side of the third arc edge away from the second arc edge, and the second curved surface being provided with operation buttons.

[0013] In one alternative embodiment, the protective housing has a through hole for the lens of an electronic device to pass through, the through hole communicating with the receiving cavity along the thickness direction of the composite back plate, and a lens frame is provided on the periphery of the through hole away from the receiving cavity; The substrate body has at least one protrusion along the side away from the receiving cavity, the protrusion is arranged along the periphery of the through hole, and the protrusion is embedded in the lens frame and connected to the lens frame.

[0014] This embodiment of the invention optimizes the connection between the composite back panel and the side frame of the protective shell by providing a first arc edge at the periphery of the first substrate and a second arc edge at the periphery of the substrate body that is in close contact with the first arc edge. This results in a smooth transition arc surface at the connection between the composite back panel and the side frame, replacing the harsh edges formed by the direct intersection of the back panel plane and the side frame vertical surface in traditional protective shells. This eliminates the discomfort caused by the presence of sharp edges during use. It significantly increases the contact area between the edge of the connection between the composite substrate and the side frame and the palm, effectively dispersing concentrated pressure and completely eliminating the discomfort, achieving a qualitative leap in grip comfort. At the same time, the close connection between the first and second arc edges greatly enhances the integrity of the composite back panel and the connection strength between the composite back panel and the side frame, forming a robust structure that is impact-resistant and drop-resistant.

[0015] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0016] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A perspective view of the protective shell provided in an embodiment of the present invention is shown; Figure 2 A perspective view of the protective shell provided in an embodiment of the present invention is shown; Figure 3 An exploded view of the protective shell provided in an embodiment of this utility model is shown; Figure 4 This diagram shows a structural schematic of the composite backplate in the protective shell provided in an embodiment of the present invention; Figure 5 A cross-sectional view of the composite backplate provided in an embodiment of the present invention is shown; Figure 6 for Figure 5 Enlarged view of point A in the middle; Figure 7 This diagram shows a structural schematic of the first substrate of the composite backplate provided in an embodiment of the present invention; Figure 8 An exploded view of the composite backplate provided in an embodiment of the present invention is shown; Figure 9 A side view of the protective shell provided in an embodiment of the present invention is shown; Figure 10 It shows Figure 9 Cross-sectional view at point BB; Figure 11 It shows Figure 9 Cross-sectional view at point AA; Figure 12 for Figure 11 Enlarged view of point B in the middle; Figure 13 for Figure 10 Enlarged diagram of point C in the middle.

[0017] The reference numerals in the detailed embodiments are as follows: 1. Composite backplate; 11. Second substrate; 12. First substrate; 121. First flat portion; 122. First curved portion; 13. Substrate body; 14. First arc edge portion; 15. Second arc edge portion; 151. First filling groove; 16. Protrusion; 17. Positioning hole; 2. Side frame; 21. Third arc edge; 211. First filling part; 212. Second filling groove; 213. Second curved surface; 22. Operation button channel; 23. Step part; 3. Lens frame; 4. Receptacle cavity; 5. Through hole; 6. Corner space. Detailed Implementation

[0018] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0019] Please see Figure 1 , Figure 2 , Figure 1 A perspective view of an embodiment of the protective shell of this utility model is shown, as follows: Figure 2 As shown, the protective shell includes a composite back panel 1 and side frames 2. The composite back panel 1 and side frames 2 are connected and enclosed to form a cavity 4 for accommodating electronic devices. The side frames 2 are typically made of a soft material, allowing them to elastically deform and wrap around the sides of the electronic devices. Figure 3 - Figure 6As shown, the composite backplate 1 includes a substrate body 13 and a first substrate 12. The first substrate 12 is connected to the side of the substrate body 13 away from the accommodating cavity 4. The periphery of the first substrate 12 is provided with a first arc edge portion 14, which is formed by bending and extending towards the side where the accommodating cavity 4 is located. The periphery of the substrate body 13 is provided with a second arc edge portion 15 that is fitted and connected to the first arc edge portion 14.

[0020] Specifically, the composite back plate 1 and the side frame 2 are connected to form a cavity 4. The composite back plate 1 forms the bottom wall of the cavity 4, and the side frame 2 forms the side wall of the cavity 4. The cavity 4 is used to accommodate and protect electronic devices, including mobile phones, tablets and other electronic products with display screens.

[0021] The composite backplate 1 adopts a multi-layer composite structure, including a substrate body 13 and a first substrate 12. The first substrate 12 is located on the side of the substrate body 13 away from the accommodating cavity 4. As the appearance surface, the first substrate 12 is pre-treated by a hot bending process, so that the four edges are hot-bent to form a first arc edge 14 with a preset radius of curvature. The first substrate 12 and the substrate body 13 are integrally formed by an injection molding process, so that the four edges of the substrate body 13 form a second arc edge 15 that fits and connects with the first arc edge 14 of the first substrate 12. The first arc edge 14 constitutes the arc-shaped contour of the protective shell.

[0022] Furthermore, the radius of curvature of the first arc edge 14 is greater than the thickness of the composite back plate 1. The radius of curvature is a geometric parameter used to describe the degree of curvature of an arc edge or arc surface. For an arc segment, the radius of curvature of the arc segment is the radius of the circle in which the arc is located. The larger the value of the radius of curvature, the gentler the curvature of the arc; conversely, the smaller the value of the radius of curvature, the more rapid the curvature. The radius of curvature of the first arc edge 14 is greater than the thickness of the composite back plate 1, ensuring that by extending the arc path at the chamfer, the arc surface at the chamfer is smoother, eliminating the rough feel caused by the chamfer being too protruding, and improving the user experience.

[0023] like Figure 6 As shown, the radius of curvature of the first arc edge 14 is greater than the thickness of the composite back plate 1, which reduces the curvature of the edge contour of the first arc edge 14 and makes the edge contour of the first arc edge 14 conform to the shape of the user's palm tiger mouth area, so as to significantly increase the contact area with the tiger mouth and achieve the effect of dispersing pressure, thereby eliminating the edge discomfort caused by excessive curvature at the connection between the composite back plate 1 and the side frame 2 in the protective shell.

[0024] The first substrate 12 is pre-treated by a hot bending process, which forms a first arc edge 14 with a preset radius of curvature around its edges. The first substrate 12 and the substrate body 13 are integrally formed by an injection molding process, which forms a second arc edge 15 around the substrate body 13 that fits and connects with the first arc edge 14 of the first substrate 12, thus ensuring the connection strength between the first substrate 12 and the substrate body 13.

[0025] In this embodiment, by making the radius of curvature of the first arc edge 14 greater than the thickness of the composite back plate 1, it is ensured that increasing the radius of curvature of the first arc edge 14 makes the arc surface of the first arc edge 14 "smooth", significantly increasing the contact area between the palm and the protective shell, distributing the pressure evenly, thereby fundamentally eliminating the discomfort.

[0026] Furthermore, such as Figure 6 and Figure 7 As shown, the outer surface of the first substrate 12 away from the accommodating cavity 4 includes a first flat portion 121 and a first curved portion 122. The first curved portion 122 is located between the first arc edge portion 14 and the first flat portion 121 and connects the first arc edge portion 14 and the first flat portion 121 respectively. In the thickness direction of the composite back plate 1, the inner surface of the substrate body 13 corresponding to the first curved portion 122 is planar. And / or, the curvature of the first curved portion 122 is less than the curvature of the first arc edge portion 14.

[0027] Specifically, the outer surface of the first substrate 12 away from the accommodating cavity 4 is not a single plane, but is jointly formed by the first flat portion 121 and the first curved portion 122. The first flat portion 121 forms the central main area of ​​the outer surface of the back plate, while the first curved portion 122 serves as the transition area between the first flat portion 121 and the first arc edge portion 14.

[0028] The inner side of the substrate body 13 corresponding to the first curved surface 122 is set as a plane to avoid partial contact between the electronic device and the inner side of the substrate body 13, and to ensure that the electronic device placed in the accommodating cavity 4 has sufficient safety.

[0029] Curvature is a mathematical quantity used to describe the degree of curvature of a curve at a certain point. The curvature of an arc is a constant and equal to the reciprocal of its radius of curvature. The curvature of the first curved surface 122 is less than the curvature of the first arc edge 14, so that the first substrate 12, starting from the first flat surface 121, smoothly transitions to the more curved first arc edge 14 through the relatively gentle first curved surface 122. This extends the curved path of the outer surface of the composite back plate 1 away from the receiving cavity 4, making the entire transition more gentle and natural, further enhancing the user experience. At the same time, by setting a gentler first curved surface 122, it helps to disperse external impact forces and reduce the risk of stress concentration. Finally, by setting the first curved surface 122 as a transition area, the smooth transition surface gives the protective case a more premium feel, and light can form a continuous and soft reflection on its surface, enhancing the visual appeal of the product.

[0030] Furthermore, such as Figure 6 and Figure 8 As shown, the composite backplate 1 also includes a second substrate 11, which is connected to the substrate body 13 on the side near the accommodating cavity 4, and the second substrate 11 is flat.

[0031] The composite backplate 1 also includes a second substrate 11 disposed on the side of the substrate body 13 near the accommodating cavity 4. The second substrate 11 is flat. When the electronic device is placed in the accommodating cavity 4, the inner side of the second substrate 11 near the accommodating cavity is in contact with the back of the electronic device or there is a gap between the two. The flat design of the second substrate 11 can avoid the situation where the electronic device and the second substrate 11 only have partial contact, resulting in the force being transmitted to the electronic device through the protective shell during the impact process and the force acting on a local part of the electronic device.

[0032] The first substrate 12 and the second substrate 11 are made of PET, and the substrate body 13 is made of PC. The first substrate 12, the second substrate 11, and the substrate body 13 are integrally formed by injection molding. The second substrate 11 and the first substrate 12 can both be made of PET (polyethylene terephthalate), which gives the second substrate 11 and the first substrate 12 high wear resistance and excellent light transmittance. The substrate body 13 located between the second substrate 11 and the first substrate 12 can be made of PC (polycarbonate), which gives the substrate body 13 outstanding toughness and impact resistance.

[0033] like Figure 7 and Figure 8As shown, at least one positioning hole 17 is provided at the corresponding position of the first substrate 12 and the second substrate 11. When the substrate body 13 is formed by injection molding, the first substrate 12 and the second substrate 11 are placed through the positioning holes 17 of the first substrate 12 and the second substrate 11, and then the molten substrate body 13 material is injected between the first substrate 12 and the second substrate 11. In this embodiment, the first substrate 12 is first formed with a first arc edge 14 by hot bending process, and then the substrate body 13 is formed between the first substrate 12 and the second substrate 11 by injection molding process, ensuring that the three are integrated, so that the inner and outer sides of the composite back plate 1 have the wear-resistant properties of PET, effectively resisting scratches in daily use; at the same time, the core of the composite back plate 1 is supported by tough PC, ensuring that the overall structure of the composite back plate 1 is not easily broken when it is impacted.

[0034] like Figure 5 and Figure 6 As shown, a first filling groove 151 is provided between the periphery of the second substrate 11 and the second arcuate edge 15; as Figure 9 , Figure 10 as well as Figure 12 As shown, the side frame 2 protrudes from the side away from the receiving cavity 4 to form a first filling part 211; the first filling part is embedded in the first filling groove 151.

[0035] The inner portion of the side frame 2 near the receiving cavity 4 protrudes to form a matching first filling portion 211. The first filling portion 211 is embedded in the first filling groove 151, so that the inner side of the second arc edge portion 15 near the receiving cavity 4 is in close contact with the first filling portion 211. The periphery of the second substrate 11 is not connected to the second arc edge portion 15 on the substrate body 13. Since the second substrate 11 is flat and the side of the second arc edge portion 15 near the receiving cavity 4 is a concave curved surface, a first filling groove 151 is formed between the second substrate 11 and the second arc edge portion 15. The inner portion of the side frame 2 near the receiving cavity 4 is provided with a first filling portion 211 that matches the first filling groove 151. The first filling portion 211 is embedded in the first filling groove 151, increasing the connection area between the side frame 2 and the second arc edge portion 15 of the substrate body 13, thereby enhancing the connection reliability and impact resistance of the side frame 2 and the composite back plate 1. This design incorporates a first filling section 211 embedded in a first filling groove 151, expanding the connection area between the side frame 2 and the composite back panel 1 from a single "line" or "surface" into a deep "volume," thus forming a robust interlocking structure. When the protective shell is subjected to external impacts such as drops or compression, stress can be effectively dispersed and transferred between the side frame 2 and the back panel through this interlocking structure, avoiding stress concentration and cracking risks at the connection point, and significantly improving the product's durability and service life.

[0036] Furthermore, such as Figure 12As shown, the peripheral side surface of the first substrate 12 is flush with the wall surface of the first filling groove 151 and is connected to the first filling part 211 respectively; and / or, along the thickness direction of the composite back plate 1, the side plane of the first filling part 211 away from the substrate body 13 protrudes into the accommodating cavity, so that there is a height difference between the side plane of the first filling part 211 away from the substrate body 13 and the side plane of the second substrate 11 close to the accommodating cavity 4.

[0037] The peripheral side surface of the first substrate 12 is flush with the wall surface of the first filling groove 151, achieving a smooth transition between the first substrate 12 and the substrate body 13. The peripheral side surface of the first substrate 12 and the wall surface of the first filling groove 151 are respectively connected to the first filling part 211, which significantly increases the effective connection area between the side frame 2 and the composite back plate 1.

[0038] There is a height difference between the first filling part 211 and the second substrate 11 in the thickness direction of the composite back plate 1, so that the depth distance from the first filling part 211 to the cavity opening of the accommodating cavity 4 is less than the depth distance from the second substrate 11 to the cavity opening of the accommodating cavity 4. When the electronic device is placed in the accommodating cavity 4, the first filling part 211, which is made of soft material, can directly contact the back of the electronic device, so that there is a gap between the back of the electronic device and the second substrate 11, thereby significantly improving the impact resistance, durability and drop resistance of the protective shell, and extending the service life of the electronic device.

[0039] Furthermore, a step portion 23 is provided on the side of the second arc edge portion 15 away from the receiving cavity 4. The side of the step portion 23 facing the first arc edge portion 14 is connected to the peripheral side of the first arc edge portion 14, which increases the connection area between the second arc edge portion 15 and the first arc edge portion 14. At the same time, it avoids the peripheral side of the first arc edge portion 14 away from the first substrate 12 from being exposed, which would lead to dust accumulation in the later stage.

[0040] In one implementation of this embodiment, such as Figure 10 and Figure 13 As shown, the side frame 2 is provided with a third arc edge 21, which is connected to the first arc edge 14. A corner space 6 is formed between the surface of the third arc edge 21 away from the receiving cavity 4 and the surface of the first arc edge 14 away from the receiving cavity 4. The corner space 6 is recessed toward the side where the receiving cavity 4 is located; and / or, the curvature of the third arc edge 21 is less than the curvature of the first arc edge 14.

[0041] The side frame 2 has a third arc edge 21 at one end near the second arc edge 15. The third arc edge 21 is part of the side frame 2 body. The outer surface of the third arc edge 21 away from the accommodating cavity 4 has a certain curvature, so that the periphery of the side frame 2 and the composite back plate 1 are smoothly connected, further eliminating the "gritty feeling" when the protective shell is used.

[0042] A corner space 6 is formed between the surface of the third arc edge 21 away from the cavity 4 and the surface of the first arc edge 14 away from the cavity 4. This breaks the continuity of the arc surface at the connection between the composite back plate 1 and the side frame 2 of the protective shell, forming a non-smooth transition area with anti-slip function. This effectively prevents slipping when holding the device and greatly improves the safety and stability of operation. The corner space 6 is recessed towards the side where the cavity 4 is located, so that the user will not feel any discomfort during use.

[0043] The third arc edge 21 is connected to the first arc edge 14 on its outer side away from the accommodating cavity 4. The end of the third arc edge 21 facing the second arc edge 15 is recessed away from the second arc edge 15 to form a second filling groove 212. The end of the second arc edge 15 of the composite back plate 1 away from the substrate body 13 extends into the second filling groove 212. Through the injection molding process, when the side frame 2 is formed, the end of the second arc edge 15 is tightly covered and embedded in the formed second filling groove 212, thereby achieving a large-area, high-strength bonding connection between the second arc edge 15 and the third arc edge 21.

[0044] The curvature of the third arc edge 21 is less than that of the first arc edge 14, making the outer surface of the third arc edge 21 smoother than that of the first arc edge 14, thus ensuring a larger transition path at the connection between the side frame 2 and the composite back panel 1.

[0045] Furthermore, such as Figure 10 As shown, the outer side of the side frame 2 away from the accommodating cavity 4 is provided with a second curved surface 213. The second curved surface 213 is connected to the side of the third arc edge 21 away from the second arc edge 15. The second curved surface 213 is provided with an operation button (not shown). Specifically, the second curved surface 213 is provided with an operation button channel 22 for installing the operation button (not shown).

[0046] The outer surface of the side frame 2 away from the cavity 4, that is, the area that the user mainly contacts when holding the side frame 2, is the second curved surface 213 with a certain degree of curvature. The second curved surface 213 and the outer surface of the third arc edge 21 away from the cavity 4 are smoothly and integrally connected, together forming a complete and continuous smooth surface on the outer side of the side frame 2, which further reduces the "gritty feeling" when using the protective case.

[0047] The side frame 2 is wrapped around the edge of the composite back plate 1 by injection molding. The protective shell first forms a base body with a second arc edge 15 between the first base and the second base by first injection molding. Then, the side frame 2 is formed on the periphery of the composite substrate by secondary injection molding. The molten side frame 2 material will cover and flow to the periphery of the composite substrate, realizing a stable integrated structure of the side frame 2 and the composite back plate 1.

[0048] Through secondary injection molding, the side frame 2 material and the edge of the composite back plate 1 are bonded at both the molecular and mechanical levels, which can effectively eliminate the risk of easy aging and loosening at the interface.

[0049] In one implementation of this embodiment, such as Figure 1 and Figure 2 As shown, the protective shell has a through hole 5 for the lens of the electronic device to pass through. Along the thickness direction of the composite back plate 1, the through hole 5 communicates with the receiving cavity 4. A lens frame 3 is provided on the periphery of the through hole 5 away from the receiving cavity 4; as shown Figure 11 As shown, the composite back plate 1 has at least one protrusion 16 along the side away from the accommodating cavity 4. The protrusion 16 is arranged along the periphery of the through hole 5 and is embedded in the lens frame 3 and connected to the lens frame 3.

[0050] The composite backplate 1 of the protective shell has a through hole 5 for the camera module of the electronic device to pass through. In order to protect the camera module of the electronic device, a lens frame 3 is provided on the side of the through hole 5 away from the accommodating cavity 4. When the electronic device is located in the accommodating cavity 4, the camera module of the electronic device passes through the through hole 5 and is placed in the lens frame 3. The lens frame 3 becomes a protective barrier for the camera module.

[0051] At least one integrally formed protrusion 16 is provided along the periphery of the through hole 5 and extending away from the accommodating cavity 4. The end of the protrusion 16 away from the composite back plate 1 is wrapped inside the lens frame 3, which increases the connection area between the lens frame 3 and the composite back plate 1 and enhances the connection strength between the lens frame 3 and the composite back plate 1.

[0052] The lens frame 3 and the composite back plate 1 are integrally formed. After the composite back plate 1 and the side frame 2 are formed by secondary injection molding, or after the substrate body 13 and the first substrate 12 and the second substrate 11 are integrally formed by injection molding, through holes 5 that match the size of the camera module are opened on the composite back plate 1 by CNC machining process (computer numerical control). The molten lens frame 3 material forms the lens frame 3 around the through hole 5 through the injection molding process, so that the protrusion 16 around the through hole 5 is completely covered in the lens frame 3, realizing a stable integrated structure of the lens frame 3 and the composite back plate 1.

[0053] Both the lens frame 3 and the side frame 2 are made of TPU (thermoplastic polyurethane). As a protruding structure surrounding the camera opening, the lens frame 3 needs to withstand potential frontal impacts independently; while the side frame 2, as a frame enclosing the edge of the electronic device, needs to withstand drops and pressure from multiple directions. TPU material has excellent flexibility and high elasticity. When the protective case is impacted, the TPU lens frame 3 and side frame 2 can effectively absorb and disperse impact energy through their own deformation, providing ultimate cushioning for the brittle camera module and the screen edge of the electronic device, greatly reducing the risk of damage to the electronic device due to drops or pressure.

[0054] Multiple operation button channels 22 are provided on the side frame 2 for installing operation buttons. The operation buttons on the side of the electronic device can be pressed by the operation buttons, making it convenient for users to operate during use.

[0055] It should be noted that, unless otherwise stated, the technical or scientific terms used in the embodiments of this utility model should have the ordinary meaning understood by those skilled in the art to which the embodiments of this utility model pertain.

[0056] In the description of this embodiment of the present invention, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0057] Furthermore, technical terms such as "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. In the description of the embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0058] In the description of this embodiment of the invention, unless otherwise explicitly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0059] In the description of this embodiment of the invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model 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 or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model, and they should all be covered within the scope of the claims and specification of this utility model. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This utility model is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A protective shell, characterized in that, The protective shell includes a composite back panel and a side frame, the composite back panel and the side frame are connected and enclosed to form an accommodating cavity for accommodating electronic devices; The composite backplate includes a substrate body and a first substrate. The first substrate is connected to the side of the substrate body away from the accommodating cavity. The periphery of the first substrate is provided with a first arc edge portion, which is formed by bending and extending toward the side where the accommodating cavity is located. The periphery of the substrate body is provided with a second arc edge portion that is fitted and connected to the first arc edge portion.

2. The protective shell according to claim 1, characterized in that, The radius of curvature of the first arc edge is greater than the thickness of the composite back plate.

3. The protective shell according to claim 1, characterized in that, The first substrate further includes a first planar portion and a first curved portion, wherein the first curved portion is located between the first arc edge portion and the first planar portion and respectively connects the first arc edge portion and the first planar portion; In the thickness direction of the composite back plate, the inner side surface of the substrate body corresponding to the first curved surface is planar; and / or, the curvature of the first curved surface is less than the curvature of the first arc edge.

4. The protective shell according to claim 1, characterized in that, The composite backplate also includes a second substrate, which is connected to the side of the substrate body near the accommodating cavity, and the second substrate is flat.

5. The protective shell according to claim 4, characterized in that, The substrate body has a first filling groove on the side facing the accommodating cavity; The side frame protrudes from the side away from the receiving cavity to form a first filling portion, which is embedded in the first filling groove.

6. The protective shell according to claim 5, characterized in that, The peripheral side surface of the first substrate is flush with the wall surface of the first filling groove and is connected to the first filling part respectively; And / or, along the thickness direction of the composite backing, the side plane of the first filling portion away from the substrate body protrudes into the accommodating cavity, so that there is a height difference between the side plane of the first filling portion away from the substrate body and the side plane of the second substrate near the accommodating cavity.

7. The protective shell according to claim 1, characterized in that, The second arc-shaped edge portion has a stepped portion on the side away from the receiving cavity, and the side of the stepped portion facing the first arc-shaped edge portion is connected to the peripheral side of the first arc-shaped edge portion.

8. The protective shell according to claim 1, characterized in that, The side frame is provided with a third arc edge, which is connected to the second arc edge; A corner space is formed between the surface of the third arc edge away from the receiving cavity and the surface of the first arc edge away from the receiving cavity, and the corner space is recessed toward the side where the receiving cavity is located. And / or, the curvature of the third arc edge is less than the curvature of the first arc edge.

9. The protective shell according to claim 8, characterized in that, The side frame is also provided with a second curved surface, which is connected to the side of the third arc edge away from the second arc edge, and the second curved surface is provided with operation buttons.

10. The protective shell according to any one of claims 1-9, characterized in that, The protective shell has a through hole for the lens of the electronic device to pass through. Along the thickness direction of the composite back plate, the through hole communicates with the receiving cavity. A lens frame is provided on the periphery of the through hole away from the receiving cavity. The substrate body has at least one protrusion on the side away from the receiving cavity. The protrusion is arranged along the periphery of the through hole and is embedded in the lens frame and connected to the lens frame.

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