Electronic equipment support

Abstract

The utility model discloses an electronic equipment support which comprises a shell used for being arranged on an external object; the abutting structure is connected with the shell and used for abutting against the surface of one side of the electronic equipment; the supporting piece is connected with the shell and used for abutting against the surface of the other side of the electronic equipment so as to be matched with the abutting structure to clamp and fix the electronic equipment, and the supporting piece is rotationally connected with the shell so that the front-back supporting angle of the supporting piece to the electronic equipment can be adjusted. When a user needs to fix the electronic equipment under different conditions, the electronic equipment support can be freely fixed on an external object, the electronic equipment is not prone to falling off under the condition that the external object moves through double fixation of the abutting structure and the supporting piece, the user can adjust the front supporting angle and the rear supporting angle, the electronic support can be matched with the electronic equipment of different models, and the user experience is improved. The practicability of the electronic equipment support is enhanced, the electronic equipment support can be stored by adjusting the supporting piece, operation is easy, and user experience is enriched.

Description

Technical Field

[0001] This application relates to the field of bracket technology, and more particularly to an electronic device bracket. Background Technology

[0002] With the development of communication technology and the popularization of smart electronic devices, current electronic device holders on the market are usually only able to be placed on flat surfaces and are prone to falling. They have fixed support angles and are cumbersome to store. When users need to use and fix electronic devices under different driving conditions, current electronic device holders cannot meet user needs. Therefore, there is an urgent need on the market for an electronic device holder that allows users to fix electronic devices at will in different driving environments, is easy to store, and is not easy to fall off. Utility Model Content

[0003] This application provides an electronic device holder that can be adjusted at any angle, is not easy to fall off, and is easy to store.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] This utility model provides an electronic device bracket, including a housing, a pressing structure, and a supporting member.

[0006] The housing is used to be mounted on an external object;

[0007] The pressure-bearing structure is connected to the housing and is used to abut against one side surface of the electronic device; and

[0008] The support member is connected to the housing and is used to abut against the other side surface of the electronic device to cooperate with the pressing structure to clamp and fix the electronic device. The support member is rotatably connected to the housing so that the front and rear support angle of the support member on the electronic device is adjustable.

[0009] In one embodiment, the support member is rotatable from 0 to 90 degrees; the housing includes an upper surface for placing the bottom of the electronic device and a bottom surface opposite to the upper surface, the support member is connected to the upper surface, and the support member is rotatable in a direction away from the pressure structure to a storage position overlapping the upper surface.

[0010] In one embodiment, the pressure-retaining structure is an elastic pressure-retaining structure, which is used to apply different magnitudes of pressure towards the front of the electronic device based on its own elasticity to cooperate with the support member to fix the electronic device at different front and rear support angles; the upper surface edge also has a notch, and when the support member is in the storage position, the edge of the support member is close to the notch, so as to facilitate the rotation of the support member by operating it from the notch; from a top view, the housing is circular; the support member is semi-circular.

[0011] In one embodiment, the housing includes a mounting hole extending through the upper surface and a housing through-hole for connecting the pressing structure. The pressing structure includes an elastic member and a pressing member connected to the elastic member. One end of the pressing member passes through the mounting hole and is connected to the inner side of the housing via the elastic member. The other end of the pressing member is used to press against the electronic device. When the electronic device is placed between the pressing member and the support member, the elastic member is compressed to apply a pressing force to the pressing member to press against the electronic device.

[0012] In one embodiment, the pressing member includes a pressing portion and a fixing seat. The fixing seat is located inside the housing. One end of the pressing portion is connected to the fixing seat, and the other end is used to press against the electronic device. The elastic member includes a torsion spring. The torsion spring includes a first fixing portion connected to the fixing seat, a torsion spring portion connected to the first fixing portion, and a second fixing portion connected to the torsion spring portion. The second fixing portion is connected to the inside of the housing to connect to the torsion spring through hole of the housing. The electronic device bracket also includes a positioning shaft that passes through the fixing hole of the fixing seat, the torsion spring through hole of the torsion spring portion, and the housing through hole of the housing.

[0013] In one embodiment, the pressing part is an arc-shaped pressing part; the pressing part includes an arc-shaped arm and a pressing end movably connected to one end of the arc-shaped arm; the pressing end is used to move relative to the arc-shaped arm to adjust the position and angle of pressing against the electronic device; the pressing end and the arc-shaped arm are rotatably connected; the number of pressing parts is two; the two pressing parts are connected by a connecting part, the connecting part is disposed on the inner side of the housing and located in the fixing groove of the fixing seat; the number of torsion spring parts is two, the first fixing part is connected between the two torsion spring parts; the number of second fixing parts is two and they are respectively connected to the two torsion spring parts; the fixing seat includes a plurality of fixing segments, each fixing segment has the fixing hole, and each torsion spring part is located between two adjacent fixing segments.

[0014] In one embodiment, the housing is provided with a first rotating connection portion, and the support member includes a support body and a second rotating connection portion connected to the support body. The first rotating connection portion and the second rotating connection portion are rotatably connected by a rotating shaft. The upper surface has a clearance groove, and at least a portion of the second rotating connection portion is located in the clearance groove. There are two second rotating connection portions and two clearance grooves, and the first rotating connection portion is located between the two second rotating connection portions. The upper surface is also provided with a bearing protrusion, which is used to support the bottom of the electronic device.

[0015] In one embodiment, the upper surface further has a data cable holder, and the pressing structure and the data cable holder are respectively located on both sides of the support member; the support member has a receiving groove on the side facing the data cable holder, and when the support member is in the storage position, at least a portion of the data cable holder is located in the receiving groove.

[0016] In one embodiment, the housing includes an upper shell and a bottom shell connected to the upper shell. The pressing structure and the support member are disposed on the upper shell, and the bottom shell is used to be disposed on the external object. The upper shell can also drive the pressing structure and the support member to rotate relative to the bottom shell under the action of external force, so that the left and right support angle of the electronic device bracket for the electronic device is adjustable. The bottom shell is used to be fixed to the external object by an adhesive member or a vacuum suction cup member.

[0017] In one embodiment, the housing further includes a limiting member located on the side of the bottom shell away from the upper shell; the bottom shell has an opening, and the inner side of the upper shell has a connector that passes through the opening and connects to the limiting member; the edge of the upper shell connects to the edge of the bottom shell and is rotatable relative to the bottom shell; the side of the bottom shell away from the upper shell has a limiting groove, and the limiting member is located in the limiting groove.

[0018] Compared with existing technologies, this utility model provides an electronic device holder. By rotatably connecting the support member to the housing, the front and rear support angle of the support member for the electronic device is adjustable. When users need to fix electronic devices in different situations, the holder can be easily fixed to external objects. The dual fixation of the pressure structure and the support member prevents the electronic device from easily falling off when the external object moves. When users need to fix different electronic devices, they can adjust the front and rear support angles to adapt the holder to different models, enhancing its practicality. Furthermore, when users need to store the holder, they can simply adjust the support member for easy storage. This satisfies users' needs in various situations and greatly improves the user experience. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a perspective view of an electronic device bracket in use according to one embodiment of this application;

[0021] Figure 2 This is a perspective view of an electronic device bracket in use in one embodiment of this application from another angle;

[0022] Figure 3 This is a perspective view of an electronic device holder in a stowed state according to one embodiment of this application;

[0023] Figure 4 This is an exploded view of an electronic device bracket in one embodiment of this application;

[0024] Figure 5 This is an exploded view of an electronic device bracket from another angle in one embodiment of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] Please refer to Figures 1 to 5As shown, this embodiment provides an electronic device holder 100, which includes a housing 2, a pressing structure 4, and a support member 3. The housing 2 is used to be mounted on an external object; the pressing structure 4 is connected to the housing 2 and is used to abut against one side surface of the electronic device; and the support member 3 is connected to the housing 2 and is used to abut against the other side surface of the electronic device to cooperate with the pressing structure 4 to clamp and fix the electronic device. The support member 3 is rotatably connected to the housing 2, making the front-to-back support angle of the support member 3 for the electronic device adjustable. It can be understood that the electronic device holder 100 is placed on the external object, such as a desktop or car dashboard, to support the electronic device, such as a mobile phone or tablet, allowing the user to free their hands for other operations. The user can also use the electronic device simultaneously. For example, when a user needs navigation while driving, the electronic device holder 100 can be placed on the car dashboard, and the mobile phone can be supported on the electronic device holder 100. The user can view the navigation on the mobile phone without holding it, which is convenient for the user and ensures driving safety. In this embodiment, the electronic device can be placed between the pressing structure 4 and the support member 3. The pressing structure 4 abuts against one side surface of the electronic device, and the support member 3 abuts against the other side surface of the electronic device, thereby clamping and fixing the electronic device. Simultaneously, by rotating the support member 3, the front-to-back support angle of the support member 3 on the electronic device can be adjusted, allowing the user to adjust the viewing or use angle of the electronic device according to personal needs, or to allow the electronic device holder 100 to support electronic devices of different shapes and sizes. With this structure, when the user needs to fix the electronic device in different situations, the user can freely fix the electronic device to external objects. The double fixation of the electronic device by the pressing structure 4 and the support member 3 makes it less likely to fall off when external objects move. When the user needs to fix different electronic devices, the front-to-back support angle of the support member 3 on the electronic device can be adjusted by rotating the connecting housing 2, allowing the user to adjust different support angles. This makes the electronic device holder adaptable to different models and sizes of electronic devices, enhancing the practicality of the electronic device holder. Furthermore, when the user needs to store the electronic device holder, it can be easily done by adjusting the support member 3. This satisfies the user's needs in different situations and greatly improves the user experience.

[0027] Furthermore, the support member 3 can rotate within a range of 0 to 90 degrees; the housing 2 includes an upper surface 21 for placing the bottom 20 of the electronic device and a bottom surface 29 opposite to the upper surface 21. The support member 3 is connected to the upper surface 21, and the support member 3 can rotate away from the pressing structure 4 to a storage position 211 overlapping the upper surface 21. It can be understood that when the user needs to use the electronic device holder 100, the support member 3 can be rotated to a suitable angle to support the electronic device; when the user does not need to use the electronic device holder 100, the support member 3 can be rotated away from the pressing structure 4 to a storage position 211 overlapping the upper surface 21 to store the electronic device holder 100. Through the above structure, by rotating the support member 3 at different angles, users can adapt to electronic devices of different sizes and models, greatly enhancing the practicality of the electronic device holder.

[0028] Specifically, the pressure-retaining structure 4 is an elastic pressure-retaining structure. This structure applies varying degrees of pressure to the front of the electronic device based on its own elasticity, cooperating with the support member 3 to fix the electronic device at different front and rear support angles. The upper surface 21 also has a notch 212 at its edge. When the support member 3 is in the storage position 211, its edge is close to the notch 212, facilitating rotation of the support member 3 from the notch 212. From a top view, the housing 2 is circular; the support member 3 is semi-circular. In this embodiment, the pressure-retaining structure 4 is an elastic pressure-retaining structure, allowing the support member 3 to support the electronic device at any angle. The elastic pressure-retaining structure can apply varying degrees of pressure to the front of the electronic device based on its own elasticity, cooperating with the support member 3, without requiring any positional adjustments to fix the electronic device. Through this structure, the elasticity and pressure of the elastic pressure-retaining structure allow the user to better adjust the front and rear support angles. To reduce the difficulty of adjusting the angle, the notch 212 on the upper surface 21 of the housing 2 allows the user to better separate the support member 3 from the housing 2 when stored, and to better grip the support member 3. The circular housing 2 and the semi-circular support member 3 allow the support member 3 to fit against the housing 2 when stored, forming a circular whole with the support member 3, making the electronic device bracket more aesthetically pleasing.

[0029] Specifically, the housing 2 includes a mounting hole 23 penetrating the upper surface 21 and a housing through hole 24 for connecting the torsion spring 7. The pressing structure 4 includes an elastic element 41 and a pressing element 42 connected to the elastic element 41. One end of the pressing element 42 passes through the mounting hole 23 and is connected to the inner side of the housing 2 through the elastic element 41. The other end of the pressing element 42 is used to press against the electronic device. When the electronic device is placed between the pressing element 42 and the support member 3, the elastic element 41 is compressed to apply a pressing force to the pressing element 42 to press against the electronic device. Through the above structure, the pressing force makes the electronic device more securely fixed to the electronic device bracket and less likely to fall off.

[0030] Specifically, the pressing member 42 includes a pressing part 5 and a fixing seat 6. The fixing seat 6 is located inside the housing 2. One end of the pressing part 5 is connected to the fixing seat 6, and the other end is used to press against the electronic device. The elastic member 41 includes a torsion spring 7. The torsion spring 7 includes a first fixing part 71 connected to the fixing seat 6, a torsion spring part 72 connected to the first fixing part 71, and a second fixing part 73 connected to the torsion spring part 72. The second fixing part 73 is connected to the inside of the housing 2 to connect to the torsion spring through hole 721 of the housing 2. The electronic device bracket 100 also includes a positioning shaft 8. The positioning shaft 8 passes through the fixing hole 61 of the fixing seat 6, the torsion spring through hole 721 of the torsion spring part 72, and the housing through hole 24 of the housing 2. With the above structure, the positioning shaft 8 passes through the fixing hole 61 of the fixing seat 6, the torsion spring through hole 721 of the torsion spring part 72 and the housing through hole 24 of the housing 2, so that the fixing seat 6, the torsion spring part 72 and the housing 2 can achieve a more stable connection, the structure is more stable and not easily damaged.

[0031] Specifically, the pressing part 5 is an arc-shaped pressing part; the pressing part 5 includes an arc-shaped arm 51 and a pressing end 52 movably connected to one end of the arc-shaped arm 51; the pressing end 52 is used to move relative to the arc-shaped arm 51 to adjust the position and angle of pressing the electronic device; the pressing end 52 and the arc-shaped arm 51 are rotatably connected; there are two pressing parts 5; the two pressing parts 5 are connected by a connecting part 9, the connecting part 9 is disposed on the inner side of the housing 2 and located in the fixing groove 62 of the fixing seat 6; there are two torsion spring parts 72, the first fixing part 71 is connected between the two torsion spring parts 72; there are two second fixing parts 73 and they are respectively connected to the two torsion spring parts 72; the fixing seat 6 includes a plurality of fixing sections 63, each fixing section 63 has the fixing hole 61, and each torsion spring part 72 is located between two adjacent fixing sections 63. With the above structure, the pressing part 5 is arc-shaped, which gives it a certain degree of flexibility. When the electronic device is placed in it, it can deform to a certain extent, making it less likely to break and thus more secure. The two pressing parts 5, the two torsion spring parts 72, and the two second fixing parts 73 provide double protection for the pressing force of the electronic device bracket 100, enhancing the stability of the bracket 100 and making it less likely for the electronic device to fall off the bracket 100.

[0032] Furthermore, the housing 2 is provided with a first rotating connection portion 25, and the support member 3 includes a support body 31 and a second rotating connection portion 32 connecting the support body 31. The first rotating connection portion 25 and the second rotating connection portion 32 are rotatably connected by a rotating shaft 10. The upper surface 21 has a clearance groove 213, and at least a portion of the second rotating connection portion 32 is located in the clearance groove 213. There are two of each of the second rotating connection portion 32 and the clearance groove 213, and the first rotating connection portion 25 is located between the two second rotating connection portions 32. The upper surface 21 is also provided with a bearing protrusion 214, which is used to support the bottom of the electronic device. Through the above structure, the support member 3 achieves a rotating connection with the housing 2 through the second rotating connection portion 32 and the first rotating connection portion 25, and the bearing protrusion 214 makes the electronic device more stable.

[0033] Furthermore, the upper surface 21 also has a data cable holder 215, with the pressing structure 4 and the data cable holder 215 located on opposite sides of the support member 3. The support member 3 has a receiving groove 33 on the side facing the data cable holder 215. When the support member 3 is in the retracted position 211, at least a portion of the data cable holder 215 is located in the receiving groove 33. With this structure, when a user needs to charge an electronic device on the bracket 100, the data cable can be fixedly placed in the data cable holder 215, enhancing the utility of the electronic device bracket 100. Simultaneously, when the electronic device bracket 100 is in the retracted state, the data cable holder 215 is partially located in the receiving groove 33, making the support member 3 more aesthetically pleasing when retracted.

[0034] Furthermore, the housing 2 includes an upper shell 26 and a bottom shell 27 connected to the upper shell 26. The pressing structure 4 and the support member 3 are disposed on the upper shell 26, and the bottom shell 27 is used to be mounted on the external object. The upper shell 26 can also rotate relative to the bottom shell 27 under the action of external force, so that the left and right support angle of the electronic device bracket 100 for the electronic device is adjustable. The bottom shell 27 is used to be fixed to the external object by adhesive or vacuum suction cup. With the above structure, the electronic device bracket 100 can rotate the pressing structure 4 and the support member 3 of the upper shell 26 under the action of external force, so that the user can adjust the left and right support angle of the electronic device at will. The bottom shell 27 is connected to the external object by adhesive, which makes the electronic device bracket 100 more stable and lower in cost. The bottom shell 27 is connected to the external object by vacuum suction cup, which makes the electronic device bracket 100 safer to use and easier to operate.

[0035] Specifically, the housing 2 further includes a limiting member 28 located on the side of the bottom housing 27 away from the upper housing 26; the bottom housing 27 has an opening 271, and the inner side of the upper housing 26 has a connector 261, which passes through the opening 271 and connects to the limiting member 28; the edge of the upper housing 26 connects to the edge of the bottom housing 27 and is capable of rotating relative to the bottom housing 27; the side of the bottom housing 27 away from the upper housing 26 has a limiting groove 272, and the limiting member 28 is located in the limiting groove 272. With this structure, the limiting member 28, located in the limiting groove 272, prevents the upper housing 26 from easily detaching from the bottom housing 27 when rotating, thus enhancing the safety of the electronic device bracket 100.

[0036] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" 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 this application 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, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0037] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An electronic device bracket, characterized in that, include: A housing (2) is used to be mounted on an external object; A pressure-bearing structure (4) is connected to the housing (2) and is used to abut against one side surface of the electronic device; and A support member (3) is connected to the housing (2) and is used to abut against the other side surface of the electronic device to cooperate with the pressing structure (4) to clamp and fix the electronic device, wherein the support member (3) is rotatably connected to the housing (2) so that the front and rear support angle of the support member (3) on the electronic device is adjustable.

2. The electronic device bracket as described in claim 1, characterized in that, The support member (3) can rotate from 0 to 90 degrees; the housing (2) includes an upper surface (21) for placing the bottom of the electronic device and a bottom surface opposite to the upper surface (21), the support member (3) is connected to the upper surface (21), and the support member (3) can rotate in a direction away from the pressing structure (4) to a storage position (211) that overlaps with the upper surface (21).

3. The electronic device bracket as described in claim 2, characterized in that, The pressure-retaining structure (4) is an elastic pressure-retaining structure (4). The elastic pressure-retaining structure (4) is used to apply different sizes of pressure towards the front of the electronic device based on its own elasticity in order to cooperate with the support member (3) to fix the electronic device at different front and rear support angles. The edge of the upper surface (21) also has a notch (212). When the support member (3) is located in the storage position (211), the edge of the support member (3) is close to the notch (212), so that it is convenient to operate the support member (3) from the notch (212) to rotate. From the top view, the shell (2) is circular. The support member (3) is semi-circular.

4. The electronic device bracket as described in claim 3, characterized in that, The housing (2) includes a mounting hole (23) penetrating the upper surface (21) and a housing through hole (24) for connecting the torsion spring. The pressing structure (4) includes an elastic element (41) and a pressing element (42) connecting the elastic element (41). One end of the pressing element (42) passes through the mounting hole (23) and is connected to the inner side of the housing (2) through the elastic element (41). The other end of the pressing element (42) is used to press against the electronic device. When the electronic device is placed between the pressing element (42) and the support (3), the elastic element (41) is compressed to apply a pressing force to the pressing element (42) to press against the electronic device.

5. The electronic device bracket as described in claim 4, characterized in that, The pressing member (42) includes a pressing part (5) and a fixing seat (6). The fixing seat (6) is located inside the housing (2). One end of the pressing part (5) is connected to the fixing seat (6), and the other end is used to press against the electronic device. The elastic member (41) includes a torsion spring (7). The torsion spring (7) includes a first fixing part (71) connected to the fixing seat (6), a torsion spring part (72) connected to the first fixing part (71), and a second fixing part (73) connected to the torsion spring part (72). The second fixing part (73) is connected to the inside of the housing (2) to connect to the torsion spring through hole (721) of the housing (2). The electronic device bracket also includes a positioning shaft (8). The positioning shaft (8) passes through the fixing hole (61) of the fixing seat (6), the torsion spring through hole (721) of the torsion spring part (72), and the housing through hole (24) of the housing (2).

6. The electronic device bracket as described in claim 5, characterized in that, The pressing part (5) is an arc-shaped pressing part (5); the pressing part (5) includes an arc-shaped arm (51) and a pressing end (52) movably connected to one end of the arc-shaped arm (51); the pressing end (52) is used to move relative to the arc-shaped arm (51) to adjust the position and angle of pressing the electronic device; the pressing end (52) and the arc-shaped arm (51) are rotatably connected; there are two pressing parts (5); the two pressing parts (5) are connected by a connecting part (9), the connecting part (9) is provided with The first fixing part (71) is located inside the housing (2) and in the fixing groove of the fixing seat (6); there are two torsion spring parts (72), and the first fixing part (71) is connected between the two torsion spring parts (72); there are two second fixing parts (73) and they are respectively connected to the two torsion spring parts (72). The fixing seat (6) includes multiple fixing segments (63), each fixing segment (63) has the fixing hole (61), and each torsion spring part (72) is located between two adjacent fixing segments (63).

7. The electronic device bracket as described in claim 2, characterized in that, The housing (2) is provided with a first rotating connection part (9), and the support member (3) includes a support body (31) and a second rotating connection part (9) connecting the support body (31). The first rotating connection part (9) and the second rotating connection part (9) are rotatably connected by a rotating shaft (10). The upper surface (21) has a relief groove (213), and at least a portion of the second rotating connection part (9) is located in the relief groove (213). There are two of each of the second rotating connection part (9) and the relief groove (213), and the first rotating connection part (9) is located between the two second rotating connection parts (9). The upper surface (21) is also provided with a bearing protrusion (214), which is used to support the bottom of the electronic device.

8. The electronic device bracket as described in claim 7, characterized in that, The upper surface (21) also has a data cable holder (215), the pressing structure (4) and the data cable holder (215) are respectively located on both sides of the support member (3); the support member (3) has a receiving groove (33) on the side facing the data cable holder (215), and when the support member (3) is located in the storage position (211), at least a portion of the data cable holder (215) is located in the receiving groove (33).

9. The electronic device bracket as described in claim 1, characterized in that, The housing (2) includes an upper shell (26) and a bottom shell (27) connected to the upper shell (26). The pressing structure (4) and the support member (3) are disposed on the upper shell (26). The bottom shell (27) is used to be disposed on the external object. The upper shell (26) can also drive the pressing structure (4) and the support member (3) to rotate relative to the bottom shell (27) under the action of external force, so that the left and right support angle of the electronic device bracket on the electronic device is adjustable. The bottom shell (27) is used to be fixed on the external object by adhesive or vacuum suction cup.

10. The electronic device bracket as described in claim 9, characterized in that, The housing (2) further includes a limiting member (28) located on the side of the bottom shell (27) away from the upper shell (26); the bottom shell (27) has an opening (271), and the inner side of the upper shell (26) has a connector (261) that passes through the opening (271) and connects to the limiting member (28); the edge of the upper shell (26) is connected to the edge of the bottom shell (27) and is rotatable relative to the bottom shell (27); the side of the bottom shell (27) away from the upper shell (26) has a limiting groove (272), and the limiting member (28) is located in the limiting groove (272).

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