Mobile phone case

Abstract

The utility model discloses a cell phone shell relates to touch screen cell phone shell technical field, including the lower shell and upper shell of buckling together, is equipped with the independent round hole for installing entity button on the lower shell, and the independent round hole is installed with the button component of being able to replace, the core advantage of the utility model lies in that button component can be individually disassembled replacement, and the buckling type lower shell and upper shell are convenient to dismount, and the independent round hole provides stable installation space for button, and the upper disc and lower disc are firmly clamped through locking ring, plug -in block etc.

Description

Technical Field

[0001] This utility model relates to the field of touchscreen phone case technology, and more particularly to phone cases. Background Technology

[0002] Current mobile smart devices primarily rely on capacitive touchscreens for human-computer interaction. Users must control the device and trigger functions by tapping or swiping on the screen. While this interaction method is intuitive, the inherent limitations of purely planar touch operation are obvious. This mode lacks the clear and reliable physical feedback provided by traditional physical buttons, resulting in a significant reduction in user comfort and immersion. However, existing phone cases with physical buttons, especially the directional buttons, use a monolithic assembly structure, typically employing a three-layer structure: a plastic button, a flexible silicone wall, and conductive silicone contacts. This results in tight connections between the button components and the casing, as well as among the internal components of the button assembly, making independent disassembly difficult. Furthermore, the elasticity of a monolithic button is provided by a single silicone pad, not by a single button itself. When a single button (such as a keycap or silicone trigger) fails due to wear and tear from prolonged use, damage from pressing, or accidental impact, users cannot replace the faulty button individually but must replace the entire phone case, significantly increasing operating costs and wasting intact components. This does not meet the requirements of energy conservation, environmental protection, and cost-effectiveness. Therefore, improvements and optimizations are needed to address these issues. Utility Model Content

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a mobile phone case.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a mobile phone case, comprising a lower shell and an upper shell that are fastened together, wherein the lower shell has an independent circular hole for installing physical buttons, and a replaceable button component is installed in the independent circular hole.

[0005] Preferably, the key component includes an upper plate and a lower plate disposed inside an independent circular hole. The upper plate and the lower plate engage to form an operation keyboard assembly. The upper plate and the lower plate are respectively provided with multiple key holes, and a keycap button is installed in the mounting hole of the upper plate. A highly conductive silicone button is abutted against the lower part of the keycap button.

[0006] Preferably, the bottom surface of the silicone button has a cylindrical trigger boss protruding in the middle, and the bottom edge of the silicone button abuts against the periphery of the mounting hole of the lower plate.

[0007] Preferably, the upper and lower plates are arranged with their slots facing each other, and the upper part of the outer ring wall of the lower plate has a locking ring protruding, while the lower part of the inner ring wall of the upper plate has a locking ring groove to cooperate with the locking ring.

[0008] Preferably, the independent circular hole has a locking ring platform in the middle, and a triangular positioning protrusion is raised on the outer side of the locking ring platform. The bottom edge of the upper plate is provided with a positioning groove to cooperate with the positioning protrusion.

[0009] Preferably, the lower plate has an integrally formed plug-in block on the periphery of the inner bottom surface of the slot, and the upper plate has a corresponding plug-in seat integrally formed to match the plug-in block; the upper plate has a support column that abuts against the lower plate installed on the inner top edge, and a reinforcing strip protrudes from the center of the inner top surface of the upper plate.

[0010] Preferably, the lower shell is further provided with a button through hole for auxiliary operation, and an auxiliary cantilever button is installed in the button through hole; a limiting groove for fixing the cantilever end of the auxiliary cantilever button is provided at the bottom of the button through hole, and a positioning post for sleeve fixing the cantilever end of the auxiliary cantilever button is provided in the limiting groove; a touch post is integrally formed in the groove of the pressing part of the auxiliary cantilever button.

[0011] Preferably, the lower shell has multiple equidistantly arranged heat dissipation holes at the back corner, and the lower side wall of the lower shell has an external speaker, SIM card slot and charging port that match the bottom of the phone; the upper shell has a protective opening for fitting the secondary screen and camera of the phone; and multiple side buttons for pressing the side buttons of the phone are provided on both sides of the upper shell.

[0012] Preferably, a latching part is installed in the middle of the upper shell connecting end, and the cantilever end of the latching part is integrally formed with an outwardly protruding latching member. A latching groove is opened on the inner side of the lower shell connecting end to cooperate with the latching member, and a deformation-aiding groove is opened on the outer end face of the latching part, so that when the latching part is pressed by a finger, the latching member can be driven to exit from the latching groove on the lower shell, and the lower shell can be slid off from the bottom of the phone for removal.

[0013] Preferably, the side frame edges of the lower shell and the upper shell are both inwardly snapped for secure mounting on the front or back of the phone.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The core advantage of this invention lies in the fact that the button components can be disassembled and replaced individually. The snap-fit ​​lower and upper shells facilitate disassembly and assembly, and the independent round hole provides a stable installation space for the button. The upper and lower plates are securely engaged through structures such as locking rings and plug blocks, achieving the purpose of horizontal anti-rotation limiting for the button components. At the same time, since the silicone button adopts an integrated structure, it combines the functions of elastic structure and conductive triggering, facilitating contact conduction through the combination of the elastic silicone wall and conductive contact of the keycap button and the silicone button. Furthermore, the keycap button, silicone button, and auxiliary cantilever button can all be replaced individually, avoiding the situation of replacing the entire unit due to the damage of a single button, and significantly reducing the use and maintenance costs of the phone case. The keycap buttons, silicone buttons, and auxiliary cantilever buttons designed in this utility model do not require overall replacement. When a single button is damaged, only the faulty part needs to be disassembled and replaced, avoiding the need to replace the entire button group or phone case due to local problems, reducing unnecessary expenses and improving the product's cost-effectiveness. The highly conductive silicone buttons effectively improve the screen's trigger sensitivity, and the trigger protrusions and elastic walls of the silicone buttons ensure accurate triggering and instant tactile feedback. This utility model features a detachable button component design, which facilitates easy separation and operation of the upper and lower plates. The independent buttons can be disassembled and assembled without complicated tools, allowing users to operate them themselves without professional maintenance, saving time and effort. It is especially suitable for handling sudden malfunctions in daily use. This invention also ensures continuous and stable use. When a single button needs to be replaced, the entire phone case does not need to be discontinued. Normal use can be quickly restored after the replacement is completed. Independent replacement avoids damage to other intact parts during the disassembly and assembly process. At the same time, with the help of various positioning and limiting structures, the button can still maintain accurate triggering and stable operation after replacement, ensuring that the user experience is not affected. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall first-view structure proposed in this utility model; Figure 2 This is a schematic diagram of the overall second-view structure proposed in this utility model; Figure 3 This is a schematic diagram of the structure of the lower shell and upper shell in the separated state proposed in this utility model; Figure 4 This is a side sectional view of the lower shell and upper shell structure proposed in this utility model; Figure 5 This is a schematic diagram of the upper shell structure proposed in this utility model; Figure 6 This is a schematic diagram of the internal structure of the lower shell groove proposed in this utility model; Figure 7 This is a first-view schematic diagram of the lower shell and button components proposed in this utility model; Figure 8 This is a second-view schematic diagram of the lower shell and button components proposed in this utility model; Figure 9 This is an exploded view of the lower shell and button components proposed in this utility model; Figure 10 This is a schematic diagram of the upper plate and keycap button structure proposed in this utility model.

[0016] Figure 11 This is a schematic diagram of the upper plate and positioning groove structure proposed in this utility model; Figure 12 This is a first-view sectional view of the upper and lower plate structure proposed in this utility model; Figure 13 This is a second-view sectional view of the upper and lower plate structure proposed in this utility model; Figure 14 This is a schematic diagram of the keycap button, silicone button, and lower plate structure proposed in this utility model; Figure 15 This is a schematic diagram of the structure of multiple keycap buttons and silicone buttons proposed in this utility model.

[0017] Figure 16 This is a schematic diagram of the single keycap button and silicone button structure proposed in this utility model; Figure 17 This is a schematic diagram of the silicone button structure proposed in this utility model; Figure 18 This is a cross-sectional view of the single keycap button and silicone button structure proposed in this utility model; Figure 19 This is a three-dimensional structural diagram of the silicone button proposed in this utility model; Figure 20 This is a schematic diagram of the side button structure proposed in this utility model.

[0018] The components in the diagram are numbered as follows: 1. Lower shell; 2. Upper shell; 3. Independent round hole; 301. Upper plate; 302. Lower plate; 303. Keycap button; 304. Silicone button; 305. Locking protrusion; 306. Locking ring groove; 307. Insertion block; 308. Insertion socket; 309. Support column; 310. Rib; 311. Positioning protrusion; 312. Positioning groove; 4. Auxiliary cantilever button; 401. Touch-sensitive column; 5. Positioning column; 6. Buckle part; 601. Buckle component; 602. Buckle groove; 7. Heat dissipation hole; 8. Side button; 9. Protective opening; 10. Charging port. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] See Figures 1 to 20As shown, the following is a description of the present invention: a mobile phone case, comprising a lower shell 1 and an upper shell 2 fastened together. The lower shell 1 has an independent circular hole 3 for installing physical buttons. A replaceable button component is installed within the independent circular hole 3. The structural advantages of the lower shell 1, the independent circular hole 3, and the detachable button component are that other subsequently developed keyboards can be used to adapt to more different types of games, thus enabling it to become a mobile phone case structure with replaceable button components. The fastening design of the lower shell 1 and upper shell 2 facilitates the installation and removal of the mobile phone case. The independent circular hole 3 provides dedicated installation space for the physical buttons, ensuring the stability of the button installation. The button component allows for individual button replacement, preventing damage due to a single button. Replacing the entire button assembly reduces operating costs. The button assembly includes an upper plate 301 and a lower plate 302 housed within independent circular holes 3. The upper plate 301 and lower plate 302 engage to form an operation keyboard assembly. In actual use, the upper plate 301 and lower plate 302 together form an operation keyboard assembly. It can be installed and fixed in the independent circular hole 3 area of ​​the lower shell 1 from the front. The upper plate 301 and lower plate 302 have multiple button holes corresponding to each other. A keycap button 303 made of highly conductive material is installed in the mounting hole of the upper plate 301. A highly conductive silicone button 304 abuts against the lower part of the keycap button 303. The silicone button 304 adopts an integrated structure of elastic wall combined with silicone conductive button. The structure combines elasticity and conductive triggering functions. The elasticity of the silicone button 304 comes from its own elastic wall. This facilitates the cooperation between the keycap button 303 and the silicone button 304, achieving contact conduction from the plastic button to the elastic silicone wall and conductive contact in a unified manner, effectively improving the contact feedback effect. The lower edges of both the keycap button 303 and the silicone button 304 are provided with limiting edges to prevent them from detaching from the upper plate 301. These physical buttons are composed of highly conductive keycap buttons 303 and highly conductive silicone buttons 304, making them suitable as the main buttons of the keyboard. The silicone button 304 is an independent, detachable, and replaceable silicone structure. Each silicone button 304 has a silicone elastic wall, providing more immediate tactile feedback when pressed. The upper plate 301 and lower plate 302 interlock to form an operation keyboard assembly, with a simple structure and stable connection, facilitating overall installation and maintenance. The highly conductive keycaps 303 and silicone buttons 304 effectively improve the sensitivity of trigger feedback to the mobile phone screen, ensuring accurate transmission of operation commands. The limiting edge design prevents the keycaps 303 and silicone buttons 304 from detaching from the upper plate 301, ensuring the normal use of the button components. The independent detachable design of the silicone buttons 304 further improves the flexibility of replacement, and the silicone elastic wall provides immediate tactile feedback when pressed, enhancing the user experience.

[0021] Reference Figures 14 to 19As shown, the silicone button 304 has a cylindrical trigger protrusion in the center of its bottom surface. This trigger protrusion allows the silicone button 304 to accurately trigger the phone screen when the keycap button 303 is pressed. The bottom edge of the silicone button 304 abuts against the periphery of the mounting hole in the lower plate 302. The cylindrical trigger protrusion design ensures that when the lower cover 1 is installed on the phone screen, pressing the button component accurately aligns it with the trigger area of ​​the phone screen, avoiding deviations during pressing and greatly improving trigger accuracy. The bottom edge of the silicone button 304 abutting against the periphery of the mounting hole in the lower plate 302 provides support and positioning for the silicone button 304, preventing displacement during pressing and further ensuring the stability and accuracy of the trigger.

[0022] Reference Figures 8 to 13 As shown, the upper plate 301 and the lower plate 302 have their slots facing each other. The upper part of the outer ring wall of the lower plate 302 has a protruding locking ring 305. The lower part of the inner ring wall of the upper plate 301 has a locking ring groove 306 to cooperate with the locking ring 305. The locking ring 305 and the locking ring groove 306 make it easy for the edge part of the lower plate 302 to fit and engage with the lower part of the upper plate 301, so as to achieve a stable connection between the two. The facing arrangement of the slots of the upper plate 301 and the lower plate 302 provides a reasonable structural basis for their engagement. The cooperation of the locking ring 305 and the locking ring groove 306 can make the edge part of the lower plate 302 fit tightly and engage with the lower part of the upper plate 301, which effectively enhances the connection stability between the upper plate 301 and the lower plate 302, prevents them from separating or loosening during use, and ensures the overall structural integrity of the operation keyboard group.

[0023] Reference Figures 12 to 13As shown, a snap-fit ​​ring is provided in the center of the independent circular hole 3, and a triangular positioning protrusion 311 protrudes from the outer surface of the snap-fit ​​ring. The bottom edge of the upper plate 301 has a positioning groove 312 that matches the positioning protrusion 311. When the upper plate 301 and the lower plate 302 are snapped together inside the independent circular hole 3, the positioning protrusion 311 on the snap-fit ​​ring is engaged with the positioning groove 312 on the upper plate 301. This prevents the button component installed in the independent circular hole 3 from rotating during use and allows for water-resistant cleaning of the installed button component. The lower plate 302 has an integrally formed insertion block 307 on the bottom periphery of the slot, and the upper plate 301 has a corresponding insertion seat 308 integrally formed to match the insertion block 307; the inner top edge of the upper plate 301 has a corresponding support column 309 that abuts against the lower plate 302, and a reinforcing strip 310 protrudes from the center of the inner top surface of the upper plate 301; after the insertion block 307 on the lower plate 302 is inserted into the insertion seat 308 of the upper plate 301, it can further securely engage the upper plate 301 and the lower plate 302 together; when replacement is needed due to damage When a keycap button 303 or a silicone button 304 is faulty, both can be removed from between the upper plate 301 and the lower plate 302 for replacement. The triangular positioning protrusion 311 and the positioning groove 312 effectively restrict the horizontal rotation of the button component within the independent circular hole 3, ensuring the positional stability of the button component during use and preventing rotation from affecting the corresponding triggering relationship between the button and the mobile phone screen. The one-piece molded connector block 307 and connector socket 308 further strengthen the connection stability between the upper plate 301 and the lower plate 302. To prevent relative displacement between the two components under stress, the support column 309 supports the lower plate 302, ensuring a stable gap between the upper plate 301 and the lower plate 302 and preventing damage to the internal structure due to compression. The reinforcing strip 310 enhances the structural strength of the upper plate 301, improves its resistance to deformation, and extends its service life. At the same time, the detachable design of the upper plate 301 and the lower plate 302 makes it easy to replace damaged keycaps 303 or silicone buttons 304 without replacing the entire key component, reducing maintenance costs and improving ease of use.

[0024] Example 1

[0025] Reference Figures 7 to 9As shown, the lower shell 1 also has a button through-hole for auxiliary operation, and an auxiliary cantilever button 4 is installed in the button through-hole. The auxiliary cantilever button 4 with a cantilever structure provides a button elastic effect, making it easy to accurately click on the corresponding area of ​​the mobile phone screen, while giving the user good tactile feedback. The auxiliary cantilever button 4 uses a button structure with high conductivity and an independent elastic wall. All auxiliary cantilever buttons 4 also have a limiting edge at the bottom to prevent the auxiliary cantilever button 4 from falling off the front of the mobile phone case. The button through-hole provides installation space for the auxiliary cantilever button 4, enriching the operation function of the mobile phone case and meeting the user's auxiliary operation needs. The cantilever structure of the auxiliary cantilever button 4 can provide a good elastic effect by utilizing its own structural characteristics, ensuring that it can quickly return after being pressed, while ensuring accurate clicking on the corresponding area of ​​the mobile phone screen and reducing operation errors. The high conductivity material not only makes it easy for users to distinguish between the auxiliary button and the main button, but also improves the trigger sensitivity. The setting of the limiting edge can effectively prevent the auxiliary cantilever button 4 from falling off the front of the mobile phone case, ensuring its installation stability and ensuring the normal realization of the auxiliary operation function.

[0026] Reference Figure 7 As shown, a limiting groove for fixing the cantilever end of the auxiliary cantilever button 4 is provided at the bottom of the button through hole, and a positioning post 5 for sleeve fixing the cantilever end of the auxiliary cantilever button 4 is protruding in the limiting groove; a touch-pressing post 401 is integrally formed in the groove of the pressing part of the auxiliary cantilever button 4. This installation method of the auxiliary cantilever button 4 also facilitates individual replacement when it is damaged, without disassembling the entire button structure or replacing the entire button part, improving the convenience and practicality in actual use; through the cooperation of the limiting groove and the positioning post 5, the cantilever end of the auxiliary cantilever button 4 can be firmly fixed, preventing displacement or loosening during pressing, ensuring the stability and accuracy of button operation; the integrally formed touch-pressing post 401 can accurately press the corresponding area of ​​the mobile phone screen, further improving the accuracy of triggering; under this installation method, the auxiliary cantilever button 4 can be replaced individually, avoiding the need to disassemble the entire button structure or replace the entire button part due to the damage of a single auxiliary button, greatly simplifying the replacement process, improving the convenience and practicality of use, and reducing maintenance costs.

[0027] Reference Figure 1 and Figure 3As shown, the lower shell 1 has multiple equally spaced heat dissipation holes 7 at the corner of its back, and the heat dissipation holes 7 are strip-shaped openings. The lower side wall of the lower shell 1, in conjunction with the bottom of the phone, has an external speaker, a SIM card slot, and a charging port 10, with the charging port 10 located between the external speaker and the SIM card slot. The upper shell 2 has a protective opening 9 for housing the secondary screen and camera, and the outer surface of the protective opening 9 is on the same horizontal plane as the outer surface of the keycap button 303. The strip-shaped heat dissipation holes 7 at the corner of the back of the lower shell 1 effectively increase airflow between the inside of the phone case and the outside, helping to dissipate heat and prevent hand injuries. The phone's performance and lifespan are affected by excessively high temperatures during prolonged use. The case is designed to accommodate the speaker grille, SIM card slot, and charging port 10 at the bottom of the phone, ensuring that the speaker function, SIM card insertion / removal, and charging are unaffected by the case, guaranteeing normal phone operation. The protective opening 9 on the top cover 2 protects the secondary screen and camera unit from external impacts and scratches. The outer surface of the protective opening 9 is flush with the outer surface of the keycaps and buttons 303, resulting in a smooth surface and improved overall aesthetics, while also preventing uneven surfaces from negatively impacting the user experience.

[0028] Reference Figure 1 , Figure 3 and Figure 20 As shown, the upper shell 2 has multiple side buttons 8 on both sides for pressing the side buttons of the phone. The side buttons 8 have an annular fitting groove in the center. The upper shell 2 has side button holes on both sides to match the side buttons of the phone, and the side buttons 8 for pressing the side buttons of the phone are installed in the side button holes. The side buttons 8 on both sides of the upper shell 2 make it convenient for users to press the side buttons of the phone, such as the volume buttons and the power button, after the phone case is installed, ensuring that the side buttons of the phone function normally. The side button holes provide a precise installation position for the side buttons 8, ensuring that the side buttons 8 correspond accurately to the side buttons of the phone and avoiding pressing deviation. The side buttons 8 are installed in the side button holes, and the connection is firm, preventing the side buttons 8 from falling off or loosening during use, ensuring the stability and reliability of operation.

[0029] Example 2

[0030] Reference Figure 5 , Figure 6 and Figure 8As shown, a latching part 6 is installed in the middle of the connecting end of the upper shell 2, and a latching member 601 with an outward protrusion is integrally formed on the cantilever end of the latching part 6. The thickness of the latching part 6 is less than the thickness of the upper shell 2, and both the inner and outer sides of the latching part 6 are within the pressing space reserved in the upper shell 2, so that the latching member 601 will not touch the phone body when the latching part 6 is pressed to unlock the connection between the lower shell 1 and the upper shell 2. A latching groove 602 is formed on the inner side of the connecting end of the lower shell 1 to match the latching member 601, and a deformation-assisting groove is formed on the outer end face of the latching part 6, so that the latching part 6 can be moved when pressed by a finger. The clip 601 retracts from the clip slot 602 on the lower shell 1, allowing the lower shell 1 to slide off and be removed from the bottom of the phone. The side buttons 8 on both sides of the upper shell 2 allow users to press the side buttons of the phone, such as the volume buttons and power buttons, after the phone case is installed, ensuring that the side buttons function normally. The side button holes provide a precise installation position for the side buttons 8, ensuring that the side buttons 8 correspond accurately to the side buttons of the phone and avoiding pressing deviations. The side buttons 8 are securely installed in the side button holes, preventing them from falling off or loosening during use, and ensuring the stability and reliability of operation.

[0031] Reference Figure 3 and Figure 6 As shown, the side edges of both the lower shell 1 and the upper shell 2 are inwardly snapped for secure installation on the front or back of the phone. This allows the lower shell 1 and upper shell 2 to be firmly installed on either the front or back of the phone. The upper shell 2 is directly snapped in like a typical phone case installation, and then the lower shell 1 is slid in from the bottom of the phone. Furthermore, the lower shell 1 has a grooved structure at its bottom end that hugs the bottom and sides of the phone, ensuring a good installation effect regardless of whether the case is installed from the back or front. In actual use, the inwardly snapped side edges allow the lower shell 1 and upper shell 2 to fit tightly against the front or back of the phone, enhancing the stability after installation and preventing the phone case from slipping. It can detach during use; and the inner wall of the groove on the lower shell 1 and upper shell 2 is reserved with an inner groove (that is, the inner groove reserved for tempered glass film), so that it will not be affected by the different thickness of tempered glass film when it is installed on the phone from the back or the front. The installation method of the upper shell 2 directly snaps in and the lower shell 1 slides in from the bottom is simple and easy to understand, which conforms to the user's usage habits of conventional phone case installation and reduces the difficulty of installation; the groove structure at the bottom of the lower shell 1 can hold the bottom and sides of the phone, further improving the fit and connection stability between the phone case and the phone, ensuring a good installation effect whether it is installed from the front or the back, and ensuring the protective function of the phone case and the stability during use.

[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mobile phone case, comprising a lower shell (1) and an upper shell (2) snapped together, characterized in that: The lower shell (1) has an independent round hole (3) for installing physical buttons, and a replaceable button component is installed in the independent round hole (3).

2. The mobile phone case according to claim 1, wherein the button component includes an upper plate (301) and a lower plate (302) disposed inside an independent circular hole (3), the upper plate (301) and the lower plate (302) engaging to form an operation keyboard group, the upper plate (301) and the lower plate (302) having a plurality of button holes respectively, and a keycap button (303) being installed in the mounting hole of the upper plate (301), and a highly conductive silicone button (304) abutting against the lower part of the keycap button (303).

3. The mobile phone case according to claim 2, characterized in that: The silicone button (304) has a trigger boss protruding in the middle of its bottom surface, and the bottom edge of the silicone button (304) abuts against the periphery of the mounting hole of the lower plate (302).

4. The mobile phone case according to claim 2, characterized in that: The upper plate (301) and the lower plate (302) are arranged opposite to each other, and the upper part of the outer ring wall of the lower plate (302) has a locking ring (305) protruding, and the lower part of the inner ring wall of the upper plate (301) has a locking ring groove (306) to cooperate with the locking ring (305).

5. The mobile phone case according to claim 2, characterized in that: The independent circular hole (3) has a locking ring platform in the middle of the hole, and a positioning protrusion (311) is raised on the outer side of the locking ring platform. The bottom edge of the upper plate (301) is provided with a positioning groove (312) in cooperation with the positioning protrusion (311).

6. The mobile phone case according to claim 2, characterized in that: The slot of the lower plate (302) is integrally formed with a plug-in block (307), and the upper plate (301) is integrally formed with a plug-in seat (308) to match the plug-in block (307); the inner top surface edge of the upper plate (301) is correspondingly installed with a support column (309) that abuts against the lower plate (302), and a reinforcing strip (310) protrudes from the middle of the inner top surface of the upper plate (301).

7. The mobile phone case according to claim 1, characterized in that: The lower shell (1) is also provided with a button through hole for auxiliary operation, and an auxiliary cantilever button (4) is installed in the button through hole; a limiting groove for fixing the cantilever end of the auxiliary cantilever button (4) is provided at the bottom of the button through hole, and a positioning post (5) for sleeve fixing the cantilever end of the auxiliary cantilever button (4) is provided in the limiting groove; a touch post (401) is integrally formed in the groove of the pressing part of the auxiliary cantilever button (4).

8. The mobile phone case according to claim 1, characterized in that: The lower shell (1) has multiple equidistant heat dissipation holes (7) at the back corner. The lower side wall of the lower shell (1) is provided with an external speaker, SIM card slot and charging port (10) to match the bottom of the mobile phone. The upper shell (2) has a protective opening (9) for fitting the secondary screen and camera of the mobile phone. Both sides of the upper shell (2) are provided with multiple side buttons (8) for pressing the side buttons of the mobile phone.

9. The mobile phone case according to claim 1, characterized in that: The upper shell (2) is equipped with a buckle part (6) at the connecting end, and the cantilever end of the buckle part (6) is integrally formed with a buckle member (601) with an outward protrusion. The lower shell (1) is provided with a buckle groove (602) on the connecting end in cooperation with the buckle member (601), and the outer end face of the buckle part (6) is provided with a deformation aid groove.

10. The mobile phone case according to claim 1, characterized in that: The side edges of the lower shell (1) and the upper shell (2) are both in an inward-fastening shape for secure mounting on the front or back of the mobile phone.

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