A general-purpose electronic device protective case

Abstract

The utility model discloses a general electronic equipment protection shell, including installing on the sheath group of electronic equipment four corners, its characterized in that: the sheath group is equipped with the stretching mechanism in, the sheath group can be through the adjustment of stretching mechanism and adapt to the electronic equipment of different length width and thickness.

Description

Technical Field

[0001] This utility model relates to a protective case for handheld electronic devices, and more particularly to a universal electronic device protective case. Background Technology

[0002] There are many types of handheld electronic devices (mobile phones are one type). To protect these devices, they are usually fitted with protective cases. Many existing protective cases cover the entire back of the electronic device, so the thickness of the case can affect heat dissipation and wireless charging capabilities, as well as the original feel and aesthetics of the device.

[0003] Therefore, a type of frameless phone case has appeared on the market (such as utility model: a frameless protective case, application number: 202323664560.0). The aforementioned phone case includes four protective sleeves installed at the corners of the phone, which serve to protect the phone.

[0004] However, due to the varying lengths, widths, and thicknesses of different electronic devices on the market, and the large number of brands, models, and styles of electronic devices such as mobile phones, coupled with their rapid pace of updates and iterations, manufacturers need to develop a large number of molds and maintain an inventory of too many electronic device models to produce protective cases for each specific electronic device model. This increases production costs.

[0005] To address the aforementioned issues, the applicant has designed a frameless stretchable protective shell. Summary of the Invention

[0006] In order to overcome the shortcomings of the existing technology, this utility model provides a universal electronic device protective case.

[0007] The technical solution adopted by this utility model to solve its technical problem is:

[0008] A universal protective case for electronic devices includes sleeve assemblies installed on the four corners of the electronic device, characterized in that: the sleeve assembly is provided with a stretching mechanism, and the sleeve assembly can be adapted to electronic devices with different lengths, widths or thicknesses by adjusting the stretching mechanism.

[0009] The sheath assembly includes four sheaths, each sheath comprising an upper shell and a lower shell. The stretching mechanism includes a thickness adjustment mechanism, which includes an upper groove in the upper shell, a latch rod rotatably disposed in a rod groove in the lower shell, and a spring capable of pushing the latch rod to rotate. The end of the latch rod is provided with a buckle, and the inner sidewall of the upper groove is provided with several locking positions. The spring can push the latch rod to swing within the upper groove, thereby causing the buckle to engage with the corresponding locking position.

[0010] The sheath assembly includes four sheaths, each sheath comprising an upper shell and a lower shell. The stretching mechanism includes a thickness adjustment mechanism, which comprises an elastic element, an upper groove in the upper shell, and a lower groove in the lower shell. An upper connecting shaft is disposed opposite to the upper shell in the upper groove, and a limiting rod is disposed in the lower groove. Both ends of the elastic element are fixed to the upper connecting shaft, and the elastic element is constrained by the limiting rod to form a V-shaped structure with both sides bent. The elastic element comprises a spring, a silicone sheet, or an elastic material, connecting the upper and lower shells to form an elastic stretching structure.

[0011] The sheath assembly includes four sheaths, each sheath including an upper shell and a lower shell. The stretching mechanism includes a thickness adjustment mechanism, which includes a clearance hole in the upper shell and several locking holes in the lower shell. An elastic plate is provided in the clearance hole, and a hook is provided at the end of the elastic plate, which can be engaged in the locking holes.

[0012] The inner side of the lower housing is provided with a groove with openings on both sides. The bottom of the upper housing can be inserted into the groove, and the outer side of the upper housing is provided with a protruding edge. The groove wall of the groove is provided with a positioning block, and the outer side of the upper housing is provided with a positioning groove. The positioning block and the positioning groove are positioned and engaged.

[0013] The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which includes a first inclined plate, a second inclined plate, several first stretching plates, and several second stretching plates. The first stretching plate is provided on the side of two of the sheaths, and the second stretching plate is provided on the side of the remaining sheaths. One sheath has a first inclined plate, and the sheath located diagonally opposite to that sheath has a second inclined plate. The ends of the first stretching plate and the first inclined plate are provided with several adjusting grooves, and the ends of the second stretching plate and the second inclined plate are provided with adjusting slots. The adjusting slots are provided with elastic teeth, and the ends of the first stretching plate and the first inclined plate can be inserted into the corresponding adjusting slots, so that the elastic teeth are engaged in the corresponding adjusting grooves.

[0014] The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which comprises several stretching plates (first and second). Two sheaths have stretching plates (first) on both sides, and the remaining sheaths have stretching plates (second) on both sides. Each stretching plate (first) has several adjusting grooves at its end, and each stretching plate (second) has an adjusting groove at its end. Each adjusting groove contains elastic teeth, allowing the end of each stretching plate (first) to be inserted into the adjusting groove, thus engaging the elastic teeth in the corresponding adjusting grooves. This enables the sheaths to be disassembled, connected, stretched, shortened, and locked together. The stretching plates (first and second) can be placed at any position on the electronic device according to customer requirements—top, bottom, left, right, or back. Adjustable stretching methods include snap-fit, elastic tooth snap-fit, snap-fit ​​hole snap-fit, rotating snap-fit, insertion snap-fit, inverted snap-fit, pressing snap-fit, screw snap-fit, and belt snap-fit.

[0015] The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which includes several stretching plates and several stretching elastic elements, including springs, silicone sheets, or elastic materials. The sheaths are provided with stretching plates on both sides. The stretching plates are fixed to the corresponding ends of the stretching elastic elements, which can realize the sheaths being disassembled, connected, stretched, shortened, and locked.

[0016] The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which includes several adjusting screws, several stretching plates one and several stretching plates two. Each of the two sheaths has a stretching plate one on both sides, and the remaining sheaths have a stretching plate two on both sides. The end of the stretching plate one has an elongated hole, and the end of the stretching plate two has an adjusting screw hole. The adjusting screw passes through the elongated hole and connects to the corresponding adjusting screw hole to lock the stretching plate one and the corresponding stretching plate two. This allows the sheaths to be disassembled, connected, stretched, shortened, and locked together.

[0017] The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which comprises several stretching plates and a bracket. The bracket can rotate 360 ​​degrees and contains a magnet for magnetic attraction. The stretching plates are mounted on the corresponding sheaths. The bracket has one or more telescopic stretching adjustment ends, each with several adjustment grooves containing elastic teeth. The ends of the stretching plates have adjustment slots, allowing the adjustment ends to be inserted into the corresponding adjustment slots, thus engaging the elastic teeth. This enables the sheaths to be disassembled, connected, stretched, shortened, and locked together. The sheaths are decorated with logos, patterns, and graphics.

[0018] The beneficial effects of this utility model are as follows: The sheath assembly of this utility model is equipped with a stretching mechanism, which can be adjusted to adapt to electronic devices with different lengths, widths, and thicknesses. This not only greatly reduces the amount of mold development but also reduces product inventory, thereby lowering production costs. It also benefits users, as one sheath assembly can be used to adapt to multiple models, thus saving users purchase costs. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of the protective case being installed on the mobile phone in Embodiment 1;

[0021] Figure 2 This is a schematic diagram of the upper and lower shells connected by a tensioning mechanism in Embodiment 1;

[0022] Figure 3 yes Figure 2 An enlarged view of point A;

[0023] Figure 4 This is a schematic diagram of the upper and lower shells connected by a tensioning mechanism in Embodiment 2;

[0024] Figure 5 yes Figure 4 An enlarged view of point B;

[0025] Figure 6 This is a schematic diagram of the separation of the upper and lower shells in Embodiment 3;

[0026] Figure 7 This is a schematic diagram of the upper and lower shells connected by a tensioning mechanism in Embodiment 3;

[0027] Figure 8 This is a schematic diagram of the hook disengaging from the locking hole in Embodiment 3;

[0028] Figure 9 This is a schematic diagram of the hook engaging the card hole in Embodiment 3;

[0029] Figure 10 This is a schematic diagram of the protective case being installed on the mobile phone in Embodiment 4;

[0030] Figure 11 This is a schematic diagram of stretching plate one and stretching plate two being pulled apart in embodiment four;

[0031] Figure 12 This is a schematic diagram showing that stretching plate one and stretching plate two are not pulled apart in embodiment four;

[0032] Figure 13 This is a schematic diagram of the protective case being installed on the mobile phone in Example 5;

[0033] Figure 14 This is a schematic diagram of the protective case being installed on the mobile phone in Embodiment Six;

[0034] Figure 15 This is a schematic diagram of the tension elastic element in Embodiment Six in a tensioned state;

[0035] Figure 16 This is a schematic diagram of the tension elastic element in Embodiment Six in a contracted state;

[0036] Figure 17 This is a schematic diagram of the protective case being installed on the mobile phone in Embodiment 7;

[0037] Figure 18 This is a schematic diagram of stretching plate one and stretching plate two being pulled apart in embodiment seven;

[0038] Figure 19 This is a schematic diagram of stretching plate one and stretching plate two not being pulled apart in embodiment seven;

[0039] Figure 20 This is a schematic diagram of the protective case being installed on the mobile phone in Embodiment 8;

[0040] Figure 21 This is a schematic diagram of the structure in Example 8 where the tension plate and the support are separated;

[0041] Figure 22 This is a schematic diagram of the back structure of a phone with a protective case;

[0042] Figure 23 This is a structural diagram showing the separation of the logo or LOGO from the protective sleeve;

[0043] Figure 24 This is a schematic diagram of the exploded structure after the sheath separates;

[0044] Figure 25 This is a schematic diagram of the structure of the sheath, which allows for adjustments to its length, width, and thickness. Detailed Implementation

[0045] The advantages and features of this disclosure, as well as its implementation methods, will be illustrated by the following embodiments described with reference to the accompanying drawings. However, this disclosure may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be comprehensive and complete, and will fully convey the scope of this disclosure to those skilled in the art. Furthermore, this disclosure is limited only by the scope of the claims.

[0046] The shapes, dimensions, scales, angles, and numbers disclosed in the accompanying drawings used to describe embodiments of this disclosure are merely examples, and therefore this disclosure is not limited to the details shown. Throughout this specification, the same reference numerals refer to the same elements. In the following description, detailed descriptions of relevant known functions or configurations will be omitted where it is determined that such detailed descriptions would unnecessarily obscure the focus of this disclosure. Where the terms “comprising,” “having,” and “including” are used in this specification, additional components may be added unless “only” is used. Unless otherwise indicated, singular terms may include plural forms.

[0047] When interpreting components, even if not explicitly described, the components are understood to include a range of tolerances.

[0048] When describing positional relationships, such as "on," "above," "below," and "adjacent to," one or more parts may be arranged between two other parts unless "immediately following" or "directly" is used.

[0049] When describing temporal relationships, such as when time sequence is described as “after,” “following,” “next,” and “before,” discontinuous cases may be included unless “exactly” or “directly” is used.

[0050] It should be understood that although the terms "first," "second," etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from other elements. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from this disclosure.

[0051] scope.

[0052] As will be fully understood by those skilled in the art, the features of the different embodiments of this disclosure may be coupled or combined with each other in part or in whole, and may cooperate with each other and be technically driven in various ways. The embodiments of this disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0053] Reference Figures 1 to 25This utility model discloses a universal protective case for electronic devices, including a set of protective sleeves installed on the four corners of an electronic device 1. Preferably, the protective sleeve set consists of four sleeves 2. Each protective sleeve set has a tensioning mechanism, which allows it to adapt to electronic devices 1 of different lengths, widths, or thicknesses. The electronic device 1 in this application primarily refers to a mobile phone, but is not limited to mobile phones; it can also be a tablet, e-reader, or other thin and light electronic products. The protective sleeve set is installed on the four corners of the mobile phone. The tensioning mechanism allows adjustment of the thickness of the sleeves 2 along the thickness direction of the mobile phone, thus adapting to mobile phones of different thicknesses. It also allows adjustment of the distance between two sleeves 2 along the length or width of the mobile phone, thus adapting to mobile phones of different lengths or widths. This not only reduces production costs but also provides convenience for users. Users can purchase one set of protective sleeves to adapt to multiple models, thereby saving on purchase costs.

[0054] Example 1, as Figure 2 and 3As shown, this embodiment illustrates a first specific structure of the stretching mechanism: In this embodiment, after the thickness of the sheath 2 is adjusted, the inner wall of the sheath 2 needs to be glued and fixed to the corner of the phone. Double-sided tape 200, traceless adhesive, reusable adhesive, quick-drying adhesive, all-purpose adhesive, etc., can be used for gluing. The sheath 2 includes an upper shell 21 and a lower shell 22, with a stretching position 300 between the upper shell 21 and the lower shell 22. The stretching mechanism includes a thickness adjustment mechanism, which includes an upper groove 211 disposed on the upper shell 21 and a rotatable groove 211 disposed on the lower shell 22. The device includes a latch 221 and a spring 222 that can push the latch 221 to rotate. The end of the latch 221 has a latch 223. The inner wall of the upper groove 211 has several locking positions 212. The spring 222 can push the latch 221 to swing within the upper groove 211, causing the latch 223 to engage with the corresponding locking position 212. The inner wall of the lower sleeve 22 has a rod groove 224. The latch 221 is rotatably mounted in the rod groove 224 via a pin. One end of the pin (not shown in the figure) is fixed to the rod groove 224, and the latch 221 has a shaft hole that mates with the pin. The cover 23 prevents the latch 221 from detaching from the other end of the pin by covering the rod groove 224. The cover 23 is embedded in the rod groove 224, so neither the latch 221 nor the cover 23 protrudes from the inner wall of the lower housing 22, which is not only aesthetically pleasing but also prevents the housing 2 from contacting the phone after installation. The spring 222 is also installed in the rod groove 224. One end of the spring 222 abuts against the bottom end of the latch 221, while the other end abuts against the groove wall of the rod groove 224. Thus, the spring 222 applies a locking force to the latch 221, keeping the latch 221's buckle 223 engaged. When the cover 2 is engaged with the locking position 212, if the thickness of the cover 2 needs to be adjusted, the bottom end of the latch 221 needs to be moved with a thin wire. The latch 221 will compress the spring 222 and swing, thereby disengaging the latch 223 from the locking position 212. The upper cover 21 or the lower cover 22 can then be stretched to the predetermined position. The thin wire can be pulled out, and the latch 221 will return to its original position under the action of the spring 222, thereby engaging the latch 223 with the other locking position 212, thus fixing the adjusted thickness of the cover 2. The cover 2 is then preferably attached to the corner of the phone with double-sided tape, which also restricts the cover 23.

[0055] Example 2, as Figure 4 and 5As shown, this embodiment illustrates a second specific structure of the stretching mechanism: In this embodiment, the sheath 2 includes an upper sleeve 21 and a lower sleeve 22, with a stretching position 300 between the upper sleeve 21 and the lower sleeve 22. The stretching mechanism includes a thickness adjustment mechanism, which includes an elastic element 24, an upper end groove 213 disposed in the upper sleeve 21, and a lower end groove 225 disposed in the lower sleeve 22. The elastic element 24 is preferably made of metal, but can also be made of other materials such as highly elastic plastic. Upper connecting shafts 214 are arranged opposite each other in the upper end groove 213, with the two upper connecting shafts 214 at the same height. A limiting rod 226 is disposed in the lower end groove 225, located below the two upper connecting shafts 214 and forming an isosceles triangle with the two upper connecting shafts 214. The two ends of the elastic element are respectively positioned by the upper connecting shafts 214. Specifically, the two ends of the elastic element are curled into a hook shape or multiple layers. The elastic element is cylindrical, preferably cylindrical, with the upper connecting shaft 214 inserted into the cylindrical shape to fix both ends of the elastic element. Then, the middle part of the elastic element is wrapped around the limiting rod 226, so that the elastic element is restricted by the limiting rod 226 to form a V-shaped structure with both sides bent. Because the upper edge of the inner wall of the upper shell 21 has an upper convex edge (not shown in the figure), and the lower edge of the inner wall of the lower shell 22 has a lower convex edge 227, a mounting groove is formed. The corner of the mobile phone is inserted into the corresponding mounting groove. If the thickness of the protective sleeve 2 needs to be adjusted, the upper shell 21 or the lower shell 22 is pulled forcefully, and the cylindrical structure at the end of the elastic element gradually unfolds, thereby increasing the thickness of the protective sleeve 2, which is equivalent to increasing the width of the mounting groove. Thus, the mobile phone can be inserted into the protective sleeve 2 and clamped and fixed by the upper convex edge and the lower convex edge 227. The elastic element includes a spring, a silicone sheet or an elastic material, which connects the upper and lower shells to form an elastic tension structure.

[0056] Example 3, as Figures 6 to 9 As shown, the sheath 2 includes an upper shell 21 and a lower shell 22, with a tension position 300 between the upper shell 21 and the lower shell 22. The tensioning mechanism includes a thickness adjustment mechanism, which includes a clearance hole 215 in the upper shell 21 and a plurality of locking holes 228 in the lower shell 22. An elastic plate 216 is provided in the clearance hole 215, and a hook 217 is provided at the end of the elastic plate 216. The hook 217 can be locked into the locking hole 228. In this structure, if the thickness of the protective case 2 needs to be adjusted, a thin iron wire needs to be inserted into the locking hole 228 to push the hook 217 out of the locking hole 228. Then, the upper cover 21 or the lower cover 22 is pulled to the predetermined position. At this position, the hook 217 is locked into another locking hole 228 by the elastic action of the elastic plate 216, so as to achieve the fixation after the position adjustment. Then, the protective case 2 is preferably fixed to the corner of the mobile phone with double-sided tape, thus completing the installation of the protective case 2.

[0057] As a preferred structure, the inner side of the lower sleeve 22 is provided with a groove 25 with openings on both sides, the bottom of the upper sleeve 21 can be inserted into the groove 25, and the outer side of the upper sleeve 21 is provided with a protruding edge 26. The groove wall of the groove 25 is provided with a positioning block 251, and the outer side of the upper sleeve 21 is provided with a positioning groove 252. The positioning block 251 and the positioning groove 252 are positioned and engaged. The above structure can ensure that the inner sides of the upper sleeve 21 and the lower sleeve 22 are flat, and the engagement of the positioning block 251 and the positioning groove 252 can ensure that the upper sleeve 21 and the lower sleeve 22 move in a straight line during stretching without deviating from each other. The protruding edge 26 can also serve as a limiting element.

[0058] Example 4, as Figures 10 to 12 As shown, the stretching mechanism includes a length and width adjustment mechanism, which includes a first inclined plate 3, a second inclined plate 4, several first stretching plates 5, and several second stretching plates 6. Each of the two sheaths 2 has a first stretching plate 5 on one side, and the remaining sides of the sheaths 2 have second stretching plates 6. In this application, the first stretching plate 5 and the corresponding second stretching plate 6 are arranged along the width direction of the phone. One sheath 2 has a first inclined plate 3, and the sheath 2 located diagonally opposite to it has a second inclined plate 4. The first inclined plate 3 and the second inclined plate 4 are close to the back of the phone and preferably form a 60-degree angle with the first stretching plate 5 and the second stretching plate 6, although 30-degree angles, 45-degree angles, etc., are also possible. The first stretching plate 5, the second stretching plate 6, the first inclined plate 3, and the second inclined plate 4 form a frame connecting the sheaths 2. The ends of the first stretching plate 5 and the first inclined plate 3 each have several second stretching plates 6. The adjustable tooth groove 100 has adjustable grooves 101 at the ends of the second tension plate 6 and the second inclined plate 4. Each adjustable groove 101 contains an elastic tooth 102. The ends of the first tension plate 5 and the first inclined plate 3 can be inserted into the corresponding adjustable groove 101, thereby engaging the elastic tooth 102 into the corresponding adjustable tooth groove 100. The elastic tooth 102 is preferably made of rubber, but can also be made of flexible materials such as silicone. If the length distance between the sheaths 2 needs to be adjusted, the first inclined plate 3 and the second inclined plate 4 are pulled or pushed to compress the elastic tooth 102, causing it to engage with the corresponding adjustable tooth groove 100, thus achieving length adjustment. If the width distance between the sheaths 2 needs to be adjusted, the first tension plate 5 and the second tension plate 6 are pulled or pushed to compress the elastic tooth 102, causing it to engage with the corresponding adjustable tooth groove 100, thus achieving width adjustment.

[0059] Example 5, such as Figure 13As shown, the stretching mechanism includes a length and width adjustment mechanism, which comprises several stretching plates 5 and several stretching plates 6. Two of the sheaths 2 have stretching plates 5 on both sides, and the remaining sheaths 2 have stretching plates 6 on both sides. Each stretching plate 5 has several adjusting grooves 100 at its end, and each stretching plate 6 has an adjusting groove 101 at its end. Each adjusting groove 101 contains elastic teeth 102. The end of each stretching plate 5 can be inserted into the adjusting groove 101, thereby engaging the elastic teeth 102 into the corresponding adjusting grooves 100. The stretching principle of this structure is the same as that of the fourth type, except that a pair of stretching plates 5 and 6 replace the diagonal pull plates 3 and 4, which are respectively positioned on the long side of the phone to achieve length adjustment. This allows for the sheaths to be disassembled, connected, stretched, shortened, and locked together. Several stretching plates (Type 1 and Type 2) can be placed in any position on the electronic equipment according to customer requirements, including top, bottom, left, right, and back. The methods for adjusting the length of the stretching plates include snap-on, elastic tooth, snap-on hole, rotating snap, insertion, inverted snap, pressing, screw, and belt snap.

[0060] Example 6, as Figures 14 to 16 As shown, the stretching mechanism includes a length and width adjustment mechanism, which comprises several stretching plates 7 and several stretching elastic elements 8, including springs, silicone sheets, or elastic materials. The stretching plates 7 are provided on both sides of the sheath 2. Each stretching plate 7 is fixed to one end of a corresponding stretching elastic element 8, allowing for disassembly, connection, lengthening, shortening, and locking of the sheaths. In this embodiment, if it is necessary to adjust the length and width distance between the sheaths 2, the stretching plates 7 at the long and short sides of the phone are pulled forcefully, thereby causing the stretching elastic elements 8 to extend. The stretching elastic elements 8 are preferably elastic rubber. Then, the sheath 2 is placed on the corresponding corner of the phone, and the elastic force of the stretching elastic elements 8 secures the sheath 2 tightly to the phone.

[0061] Example 7, as Figures 17 to 19As shown, the stretching mechanism includes a length and width adjustment mechanism, which includes several adjusting screws 9, several stretching plates 5, and several stretching plates 6. Two sheaths 2 have stretching plates 5 on both sides, and the remaining sheaths 2 have stretching plates 6 on both sides. Each stretching plate 5 has an elongated hole 10 at its end, and each stretching plate 6 has an adjusting screw hole at its end. The adjusting screws 9 pass through the elongated holes 10 and connect to the corresponding adjusting screw holes to lock the stretching plates 5 and 6. In this embodiment, if adjustment is required... Adjust the length and width distance between the sleeves 2, loosen the adjusting screws 9, and then pull apart or push together the corresponding stretching plates 5 and 6 to lengthen or shorten them. Then, put the sleeves 2 on the corresponding corners of the phone, and then tighten the adjusting screws 9 at all four locations to fix the positions of the stretching plates 5 and 6. Of course, the end of the stretching plate 6 has a groove 11, and the end of the stretching plate 5 can be inserted into the groove 11. The adjusting screw hole is set at the bottom of the groove 11, so that when the ends of the stretching plates 5 and 6 overlap, they will not be too thick, thus making it aesthetically pleasing.

[0062] Example 8, as Figure 20 and Figure 21 As shown, the stretching mechanism includes a length and width adjustment mechanism, which includes several stretching plates 7 and a bracket 12. The bracket can rotate 360 ​​degrees and contains a magnet for magnetic attraction. The stretching plate 7 is mounted on the corresponding sheath 2. The bracket 12 has one or more telescopic stretching adjustment ends 13, each with several adjustment grooves 100. Each adjustment groove 101 contains an elastic tooth 102. The end of the stretching plate 7 has an adjustment groove 101, and the adjustment end 13 can be inserted into the corresponding adjustment groove 101, thereby allowing the elastic tooth 102 to engage with the corresponding adjustment groove 100. This enables the sheaths to be disassembled, connected, stretched, shortened, and locked together. In this application, the adjustment principle is the same as in Embodiment 5, except that the stretching plate 7 is V-shaped and the adjustment end 13 is mounted on the bracket 12.

[0063] As a preferred structure, the bracket 12 can rotate, and the bracket 12 is provided with a hinged pull ring 14, which can be hooked on the finger for easy carrying, and when unfolded, it can be used as a support for mobile phones, making it convenient for users to watch movies, etc.

[0064] like Figure 22 and Figure 23As shown, in a preferred configuration, the protective sleeve is provided with a logo, pattern, and graphic. Specifically, the inner side of the protective sleeve 2 is provided with a corner plate 15, which has a marking groove. The marking groove contains a replaceable logo, pattern, or graphic 16. The logo, pattern, or graphic 16 can be pasted into the marking groove using adhesive, glue, or the like, thus allowing for personalized customization to meet the needs of young consumers. Of course, the logo, pattern, or graphic 16 can also be connected to the protective sleeve 2 by snap-fit. The side of the corner plate 15 facing the mobile phone is provided with a slot 17. The bottom surface of the slot 17 is provided with a guide hole 18 that penetrates the bottom surface. The logo, pattern, or graphic 16 is provided with a guide rod 19 and a clip plate 20 connected to the guide rod 19. The guide rod 19 can be snapped into the guide hole 18 and the clip plate 20 can be snapped into the slot 17, thus realizing the replaceable installation of the logo, pattern, or graphic 16.

[0065] The foregoing has provided a detailed description of a universal electronic device protective case provided by the embodiments of this utility model. Specific examples have been used to illustrate the principles and implementation methods of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A general-purpose electronic device protection case comprising a sheath set installed on the four corners of an electronic device, characterized in that: The sheath assembly is equipped with a stretching mechanism, which can be adjusted to fit electronic devices with different lengths, widths, or thicknesses. The sheath assembly includes four sheaths, each consisting of an upper shell and a lower shell.

2. A protective case for electronic devices according to claim 1, wherein: The stretching mechanism includes a thickness adjustment mechanism, which includes an upper groove in the upper shell, a latch rod rotatably disposed in the rod groove in the lower shell, and a spring capable of pushing the latch rod to rotate. The end of the latch rod is provided with a buckle, and the inner sidewall of the upper groove is provided with several locking positions. The spring can push the latch rod to swing in the upper groove so that the buckle engages with the corresponding locking position.

3. A protective case for electronic devices according to claim 1, wherein: The sheath assembly includes four sheaths, each sheath comprising an upper shell and a lower shell. The stretching mechanism includes a thickness adjustment mechanism, which comprises an elastic element, an upper groove in the upper shell, and a lower groove in the lower shell. An upper connecting shaft is disposed opposite to the upper shell in the upper groove, and a limiting rod is disposed in the lower groove. Both ends of the elastic element are fixed to the upper connecting shaft, and the elastic element is constrained by the limiting rod to form a V-shaped structure with both sides bent. The elastic element comprises a spring, a silicone sheet, or an elastic material, connecting the upper and lower shells to form an elastic stretching structure.

4. The protective case for electronic devices of claim 1, wherein: The sheath assembly includes four sheaths, each sheath including an upper shell and a lower shell. The stretching mechanism includes a thickness adjustment mechanism, which includes a clearance hole in the upper shell and several locking holes in the lower shell. An elastic plate is provided in the clearance hole, and a hook is provided at the end of the elastic plate, which can be engaged in the locking holes.

5. A protective case for electronic devices as claimed in any one of claims 2 to 4, wherein: The inner side of the lower housing is provided with a groove with openings on both sides. The bottom of the upper housing can be inserted into the groove, and the outer side of the upper housing is provided with a protruding edge. The groove wall of the groove is provided with a positioning block, and the outer side of the upper housing is provided with a positioning groove. The positioning block and the positioning groove are positioned and engaged.

6. A protective case for electronic devices according to claim 1, wherein: The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which includes a first inclined plate, a second inclined plate, several first stretching plates, and several second stretching plates. The first stretching plate is provided on the side of two of the sheaths, and the second stretching plate is provided on the side of the remaining sheaths. One sheath has a first inclined plate, and the sheath located diagonally opposite to that sheath has a second inclined plate. The ends of the first stretching plate and the first inclined plate are provided with several adjusting grooves, and the ends of the second stretching plate and the second inclined plate are provided with adjusting slots. The adjusting slots are provided with elastic teeth, and the ends of the first stretching plate and the first inclined plate can be inserted into the corresponding adjusting slots, so that the elastic teeth are engaged in the corresponding adjusting grooves.

7. The protective case for electronic devices of claim 1, wherein: The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which comprises several stretching plates 1 and several stretching plates 2. Two sheaths have stretching plates 1 on both sides, and the remaining sheaths have stretching plates 2 on both sides. Each stretching plate 1 has several adjusting grooves at its end, and each stretching plate 2 has an adjusting groove at its end. The adjusting groove contains elastic teeth, allowing the end of each stretching plate 1 to be inserted into the adjusting groove, thus engaging the elastic teeth in the corresponding adjusting grooves. This enables the sheaths to be disassembled, connected, stretched, shortened, and locked together. The stretching plates 1 and 2 can be placed at any position on the electronic device according to customer requirements—up, down, left, right, or back. Adjustable stretching length can be achieved through various methods, including snap-fit, elastic tooth snap-fit, snap-fit ​​hole snap-fit, rotating snap-fit, insertion snap-fit, inverted snap-fit, pressing snap-fit, screw snap-fit, and belt snap-fit.

8. The protective case for electronic devices of claim 1, wherein: The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which includes several stretching plates and several stretching elastic elements, including springs, silicone sheets, or elastic materials. The sheaths are provided with stretching plates on both sides. The stretching plates are fixed to the corresponding ends of the stretching elastic elements, which can realize the sheaths being disassembled, connected, stretched, shortened, and locked.

9. The protective case for electronic devices of claim 1, wherein: The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which includes several adjusting screws, several stretching plates one and several stretching plates two. Each of the two sheaths has a stretching plate one on both sides, and the remaining sheaths have a stretching plate two on both sides. The end of the stretching plate one has an elongated hole, and the end of the stretching plate two has an adjusting screw hole. The adjusting screw passes through the elongated hole and connects to the corresponding adjusting screw hole to lock the stretching plate one and the corresponding stretching plate two. This allows the sheaths to be disassembled, connected, stretched, shortened, and locked together.

10. The protective case for electronic devices of claim 6, wherein: The sheath assembly includes four sheaths. The stretching mechanism includes a length and width adjustment mechanism, which comprises several stretching plates and a bracket. The bracket can rotate 360 ​​degrees and contains a magnet for magnetic attraction. The stretching plates are mounted on the corresponding sheaths. The bracket has one or more telescopic stretching adjustment ends, each with several adjustment grooves containing elastic teeth. The ends of the stretching plates have adjustment slots, allowing the adjustment ends to be inserted into the corresponding adjustment slots, thus engaging the elastic teeth. This enables the sheaths to be disassembled, connected, stretched, shortened, and locked together. The sheaths are decorated with logos, patterns, and graphics.

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