CN218567929U - Tablet personal computer protection device with expansion and support functions - Google Patents

Abstract

The application relates to the technical field of support structures, and provides a tablet personal computer protection device with expansion and support functions, which comprises a keyboard assembly, a HUB assembly and a supporting plate assembly; the HUB assembly comprises a shell, a HUB body arranged in the shell and a first rotating shaft assembly arranged on the shell, the keyboard assembly is connected to the shell, and the keyboard assembly is electrically connected with the HUB body; the supporting plate assembly comprises a second rotating shaft assembly, a connecting piece and a bearing piece for placing the mobile terminal, one end of the connecting piece is connected to the first rotating shaft assembly, the other end of the connecting piece is connected to the second rotating shaft assembly, and the bearing piece is connected to the second rotating shaft assembly; in the embodiment of the application, when the mobile terminal is connected to the keyboard component of the tablet personal computer protection device, the mobile terminal can be connected with other peripherals through the HUB body, and the bearing piece can rotate relative to the connecting piece, so that the adjusting range of the bearing piece is larger.

Description

Tablet personal computer protection device with expansion and support functions

Technical Field

The application relates to the technical field of support structures, and particularly provides a tablet personal computer protection device with expansion and support functions.

Background

With the development of science and technology, mobile terminals such as mobile phones and flat lamps are widely used, and when a user uses the mobile terminal to perform video call, browse, work, game, view and the like, the user needs to hold the mobile terminal for a long time, which seriously affects the use comfort of the user.

In order to solve such a problem, a tablet support with an external keyboard is on the market, and when a user uses a mobile terminal such as a tablet, the mobile terminal can be leaned on the tablet support, and then the external keyboard is connected with a tablet computer through a wire for use. However, since there is only one interface of the mobile terminal such as a tablet, the external keyboard cannot be used simultaneously when charging is required or an earphone is required to be plugged in.

SUMMERY OF THE UTILITY MODEL

The purpose of the embodiment of the application is to provide a panel computer protection device with extension and support function, can also be connected with other peripheral hardware through the HUB body when making mobile terminal connect in panel computer protection device's keyboard subassembly, and the supporting piece that is used for placing mobile terminal can rotate for the connecting piece to make the adjustment range of supporting piece bigger.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions:

the embodiment of the application provides a tablet personal computer protection device with expansion and support functions, which is used for connecting a mobile terminal and comprises a keyboard assembly, a HUB assembly and a supporting plate assembly; the HUB assembly comprises a shell, a HUB body arranged in the shell and a first rotating shaft assembly arranged on the shell, the keyboard assembly is connected to the shell, and the keyboard assembly is electrically connected with the HUB body; the supporting plate component can rotate around the rotating center of the first rotating shaft component, and the supporting plate component has a closed state of rotating to cover the surface of the keyboard component and an open state of rotating to be far away from the surface of the keyboard component; the supporting plate assembly comprises a second rotating shaft assembly, a connecting piece and a bearing piece used for placing the mobile terminal, one end of the connecting piece is connected to the first rotating shaft assembly, the other end of the connecting piece is connected to the second rotating shaft assembly, the bearing piece is connected to the second rotating shaft assembly, and the bearing piece can rotate around the rotating center of the second rotating shaft assembly.

The beneficial effects of the embodiment of the application are as follows: according to the tablet personal computer protection device with the expansion and support functions, the HUB body is connected to the keyboard assembly, and the expansion port of the HUB body can meet the requirement that the keyboard assembly and other peripherals are used by the terminal equipment at the same time; meanwhile, the supporting plate component is connected with the shell through the first rotating shaft component, and when the tablet personal computer protection device is not used, the supporting plate component can rotate around the rotating center of the first rotating shaft component to a closed state to cover the surface of the keyboard component so as to be convenient to store; when the supporting plate assembly needs to be used, the supporting plate assembly is rotated to the opening state, the supporting piece and the connecting piece are connected through the second rotating shaft assembly, namely the supporting piece for placing the terminal equipment can be rotated and adjusted relative to the connecting piece again, so that the adjusting range of the supporting piece is larger, and the applicability of a user is effectively improved.

In one embodiment, the first rotating shaft assembly comprises a rotating member, a first screw shaft and a positioning member, the first screw shaft is provided with a rotating shaft part and a screw part, the positioning member is arranged on the screw part, the rotating member is arranged on the rotating shaft part, and the rotating member is connected to the connecting member; the shell is provided with a containing groove for containing a positioning piece, the inner side wall of the containing groove is provided with a threaded hole in threaded fit with the screw rod part, and the positioning piece is arranged in the containing groove so that the screw rod part is in threaded connection with the threaded hole.

In one embodiment, the second rotating shaft assembly comprises an upper hinge, a lower hinge and a second screw shaft, and the second screw shaft penetrates through the upper hinge and the lower hinge and is in rotating fit with the upper hinge and the lower hinge; the upper hinge is connected with the supporting piece, and the lower hinge is connected with the connecting piece.

In one embodiment, the supporting plate assembly further comprises a third rotating shaft assembly, the third rotating shaft assembly comprises an upper rotating shaft piece, a lower rotating shaft piece and a rotating shaft, and the rotating shaft is arranged on the upper rotating shaft piece and the lower rotating shaft piece in a penetrating mode and is in rotating fit with the upper rotating shaft piece and the lower rotating shaft piece; the upper rotating shaft piece is connected to the supporting piece, and the lower rotating shaft piece is connected to the connecting piece.

In one embodiment, the HUB body is provided with a connection socket for connecting with the mobile terminal wire, the HUB body is further provided with a first control switch electrically connected with the connection socket, and the connection socket and the first control switch are exposed out of the shell.

In one embodiment, the HUB assembly includes a data line electrically connected to the HUB body, and the data line has a second control switch disposed thereon.

In one embodiment, the supporting member is provided with a magnetic member for attracting the mobile terminal.

In one embodiment, the surfaces of the support and the connector are covered with a protective sleeve.

In one embodiment, the support member is provided with an avoiding hole for exposing a camera of the mobile terminal.

In one embodiment, a protective pad is disposed on an outer surface of the housing for protecting the mobile terminal when the tray assembly is rotated to the closed position.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a tablet computer protection device with expansion and support functions according to an embodiment of the present disclosure during operation;

fig. 2 is a schematic structural diagram of a tablet personal computer protection device with expansion and support functions according to an embodiment of the present disclosure when folded;

fig. 3 is a schematic structural diagram of another tablet computer protection device with expansion and support functions according to an embodiment of the present disclosure during operation;

fig. 4 is an exploded view of a tablet computer protection device with expansion and support functions according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a first rotating shaft assembly provided by an embodiment of the present application;

fig. 6 is a schematic structural view of a second rotating shaft assembly provided in the embodiment of the present application;

fig. 7 is a schematic structural diagram of a third rotating shaft assembly provided in the embodiment of the present application;

fig. 8 is a schematic view of a connection structure between a rotating member and a housing according to an embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

100. a tablet computer protection device; 200. a mobile terminal; 10. a keyboard assembly; 20. a HUB assembly; 21. A housing; 211. a containing groove; 22. a HUB body; 221. a connecting socket; 222. a first control switch; 223. a data line; 224. a second control switch; 23. a first rotating shaft assembly; 231. a rotating member; 232. a first screw shaft; 2321. a rotating shaft part; 2322. a screw section; 233. a positioning member; 24. a protective pad; 30. a pallet assembly; 31. a second spindle assembly; 311. mounting a hinge; 312. a lower hinge; 313. a second screw shaft; 32. A connecting member; 33. a support member; 331. avoiding holes; 332. a protective sleeve; 34. a third spindle assembly; 341. An upper rotating shaft sheet; 342. a lower spindle sheet; 343. a rotating shaft; 35. a magnetic member; 36. and (6) a protective sleeve.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be considered as limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and encompass, for example, both fixed and removable connections or integral parts thereof; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

With the development of science and technology, mobile terminals such as mobile phones and flat lamps are widely used, and when a user uses the mobile terminal to perform video call, browse, work, game, view and the like, the user needs to hold the mobile terminal for a long time, which seriously affects the use comfort of the user. In order to solve such a problem, a tablet support with an external keyboard is on the market, and when a user uses a mobile terminal such as a tablet, the mobile terminal can lean on the tablet support, and then the external keyboard is connected with a tablet computer by a wire for use. However, since there is only one interface of the mobile terminal such as a tablet, the external keyboard cannot be used simultaneously when charging is required or an earphone is required to be plugged in.

Therefore, the embodiment of the application provides a tablet personal computer protection device 100 with expansion and support functions, when the mobile terminal 200 is connected to the keyboard assembly 10 of the tablet personal computer protection device 100, the mobile terminal can be connected with other peripherals through the HUB body, and a support for placing the mobile terminal 200 can rotate relative to the connecting piece, so that the adjustment range of the support is larger.

Referring to fig. 1 to 4, an embodiment of the present application provides a tablet computer protection device 100 with expansion and support functions, for connecting a mobile terminal 200, including a keyboard assembly 10, a HUB assembly 20, and a tray assembly 30; the HUB assembly 20 comprises a housing 21, a HUB body 22 arranged in the housing 21, and a first rotating shaft assembly 23 arranged on the housing 21, the keyboard assembly 10 is connected to the housing 21, and the keyboard assembly 10 is electrically connected with the HUB body 22; the tray assembly 30 is rotatable about the center of rotation of the first pivot assembly 23, the tray assembly 30 having a closed position rotated to cover the surface of the keyboard assembly 10 and an open position rotated away from the surface of the keyboard assembly 10; the cradle assembly 30 includes a second rotary shaft assembly 31, a connecting member 32, and a holder 33 for placing the mobile terminal 200, one end of the connecting member 32 is connected to the first rotary shaft assembly 23, the other end of the connecting member 32 is connected to the second rotary shaft assembly 31, the holder 33 is connected to the second rotary shaft assembly 31, and the holder 33 can rotate around the rotation center of the second rotary shaft assembly 31.

The mobile terminal 200 refers to a mobile phone, a tablet, and other devices, and when a user uses the mobile phone, the tablet, and other devices, the mobile phone, the tablet, and other devices may be placed on the carrier, and then the mobile phone, the tablet, and other devices are electrically connected to the HUB body 22 by using the data line; like this, cell-phone, panel etc. both can place through holding the piece and watch, can connect keyboard subassembly 10 again in order to use, simultaneously, when peripheral hardware such as earphone need charge or use, still can be connected with a plurality of expansion mouths of the HUB body, and the panel computer protection device 100 that has extension and support function promptly can satisfy mobile terminal 200 and use the demand of a plurality of peripheral hardware simultaneously.

The HUB body 22 described above refers to a multi-port repeater including a main circuit board and a plurality of expansion ports electrically connected to the main circuit board, through which the mobile terminal 200 can be used in conjunction with connection to the keypad assembly 10 and other peripherals.

The shell 21 is used for setting up the HUB body 22 and fixedly mounted keyboard assembly 10, still is provided with first pivot subassembly 23 on the shell 21 simultaneously, and layer board subassembly 30 can rotate around first pivot subassembly 23 to make layer board subassembly 30 open and shut and rotate for keyboard assembly 10. The closed state refers to the state that the tray assembly 30 rotates around the first rotating shaft assembly 23 to a position covering the surface of the keyboard assembly 10, at this time, the tray assembly 30 is attached to the keyboard assembly 10, and the tray assembly 30 can be conveniently stored and carried when being attached to the keyboard assembly 10; the opened state refers to the tray assembly 30 being rotated about the first rotation axis assembly 23 to a position away from the keyboard assembly 10 for placing the mobile terminal 200.

The supporting plate assembly 30 comprises a supporting piece 33 and a connecting piece 32, the connecting piece 32 is connected to the first rotating shaft assembly 23, and the supporting piece 33 and the connecting piece 32 are both connected to the second rotating shaft assembly 31; therefore, the connecting member 32 can rotate around the first rotating shaft assembly 23, the supporting member 33 can rotate around the second rotating shaft assembly 31, and the position and the inclination angle of the supporting member 33 relative to the keyboard assembly 10 can be adjusted by adjusting the included angle between the connecting member 32 and the keyboard assembly 10 and the included angle between the supporting member 33 and the connecting member 32, so that the supporting member 33 is more suitable for the user to watch when the mobile terminal 200 is placed. The supporting member 33 and the connecting member 32 may be a plate structure, a net structure, a grid structure, or the like. In one embodiment, the connecting member 32 rotates around the first rotating shaft assembly 23 to form an angle of 70 ° with the keyboard assembly 10, and the supporting member 33 rotates around the second rotating shaft assembly 31 to form an angle of 110 ° with the connecting member 32, so that the viewing angle of the mobile terminal 200 placed on the supporting member 33 is optimum.

According to the tablet personal computer protection device 100 with the expansion and support functions provided by the embodiment of the application, the HUB body 22 is connected to the keyboard assembly 10, and the requirement that the keyboard assembly 10 and other peripheral equipment are used by the terminal equipment at the same time can be met by utilizing the expansion port of the HUB body 22; meanwhile, the supporting plate assembly 30 is connected with the housing 21 through the first rotating shaft assembly 23, so that when the tablet personal computer protection device 100 is not used, the supporting plate assembly 30 can rotate around the rotating center of the first rotating shaft assembly 23 to a closed state to cover the surface of the keyboard assembly 10, so as to be convenient to store; when the terminal device is needed to be used, the supporting plate assembly 30 is rotated to the open state, and the supporting piece 33 is connected with the connecting piece 32 through the second rotating shaft assembly 31, that is, the supporting piece 33 used for placing the terminal device can be rotated and adjusted relative to the connecting piece 32 again, so that the adjusting range of the supporting piece 33 is larger, and the applicability of a user is effectively improved.

Referring to fig. 1 to 5, in an embodiment, the first rotating shaft assembly 23 includes a rotating member 231, a first screw shaft 232 and a positioning member 233, the first screw shaft 232 has a rotating shaft portion 2321 and a screw portion 2322, the positioning member 233 is disposed on the screw portion 2322, the rotating member 231 is disposed on the rotating shaft portion 2321, and the rotating member 231 is connected to the connecting member 32; the housing 21 is formed with an accommodating groove 211 for accommodating the positioning member 233, a threaded hole in threaded engagement with the screw portion 2322 is formed in an inner side wall of the accommodating groove 211, and the positioning member 233 is disposed in the accommodating groove 211, so that the screw portion 2322 is screwed into the threaded hole. In a normal state, the supporting member 33 and the connecting member 32 are both attached to the surface of the keyboard assembly 10 and are in the same plane; when the mobile terminal 200 needs to be placed by using the tray assembly 30, the connecting member 32 is controlled to rotate in a direction away from the keyboard assembly 10, the keyboard connecting member 32 drives the rotating member 231 to rotate synchronously, so that the rotating member 231 drives the rotating shaft 2321 and drives the screw portion 2322 to rotate, and the screw portion 2322 is correspondingly partially screwed into or screwed out of the threaded hole, so that the connecting member 32 rotates to a specified position; the support member 33 is then controlled to rotate again in a direction away from the keyboard assembly 10, so that the support member 33 rotates to a preset inclination angle. Specifically, the screw portion 2322 of the first screw shaft 232 is further sleeved with the rotating shaft positioning member 233 and the belleville spring, and finally the anti-slip nut is screwed to lock the rotating shaft positioning member 233 and the belleville spring in the positioning member 233 and lock the positioning member 233 on the screw portion 2322.

In a specific embodiment of this embodiment, the number of the first rotating shaft assemblies 23 is two, threaded holes are respectively formed on two opposite inner side walls of the accommodating groove 211, and the rotating element 231 has two rotating shaft holes which are oppositely arranged and used for being inserted and matched with the rotating shaft portion 2321; the two first rotating shaft assemblies 23 are respectively disposed at opposite ends of the accommodating groove 211, so that the screw portions 2322 of the two first screw shafts 232 are screwed into the corresponding threaded holes, and then the rotating member 231 is connected to the two rotating shaft portions 2321, so that the rotating member 231 rotates synchronously with the two first screw shafts 232. Wherein the maximum rotation angle of the first screw shaft 232 may be set to 70 °.

Referring to fig. 1 to 6, in one embodiment, the second rotating shaft assembly 31 includes an upper hinge 311, a lower hinge 312, and a second screw shaft 313, and the second screw shaft 313 is inserted into the upper hinge 311 and the lower hinge 312 and is rotatably engaged with the upper hinge 311 and the lower hinge 312; the upper hinge 311 is connected to the support member 33, and the lower hinge 312 is connected to the connecting member 32. When the angle of the support member 33 relative to the connecting member 32 is adjusted, the support member 33 is controlled to rotate, so that the support member 33 drives the upper hinge 311 to rotate around the central axis of the second screw shaft 313, and the support member 33 is rotated to a preset angle. Specifically, the upper hinge 311 includes a pressing piece, and a rotating piece, the rotating piece is rotatably connected to the second screw shaft 313, and the pressing piece are respectively pressed on the rotating disc at two opposite sides of the rotating piece to form the upper hinge 311; similarly, the lower hinge 312 has the same structure as the upper hinge 311, and the lower hinge 312 also includes a pressing piece, a pressing piece and a rotating piece.

Referring to fig. 1 to 7, in one embodiment, the supporting plate assembly 30 further includes a third rotating shaft assembly 34, the third rotating shaft assembly 34 includes an upper rotating shaft piece 341, a lower rotating shaft piece 342 and a rotating shaft 343, and the rotating shaft 343 is disposed through the upper rotating shaft piece 341 and the lower rotating shaft piece 342 and is rotatably engaged with the upper rotating shaft piece 341 and the lower rotating shaft piece 342; the upper rotating shaft piece 341 is connected to the bearing member 33, and the lower rotating shaft piece 342 is connected to the connecting member 32. When the angle of the support member 33 relative to the connecting member 32 is adjusted, the support member 33 is controlled to rotate, so that the support member 33 drives the upper rotating shaft piece 341 to rotate around the central axis of the rotating shaft 343, and the support member 33 is rotated to a predetermined angle.

In a specific embodiment of this embodiment, the number of the second rotating shaft assemblies 31 is two, the number of the third rotating shaft assemblies 34 is three, and the second rotating shaft assemblies 31 and the third rotating shaft assemblies 34 are sequentially arranged at intervals. When the angle of the support member 33 relative to the connecting member 32 is adjusted, the support member 33 is controlled to rotate, so that the support member 33 drives the upper hinges 311 and the upper rotating shaft 341 to rotate synchronously, thereby effectively improving the rotating effect of the support member 33. Wherein, the maximum opening and closing angle of the second and third rotation shaft assemblies 31 and 34 may be set to 110 °.

Referring to fig. 3 to 8, in one embodiment, the HUB body 22 has a connection socket 221 for connecting with the mobile terminal 200, the HUB body 22 further has a first control switch 222 electrically connected to the connection socket 221, and the connection socket 221 and the first control switch 222 are exposed out of the housing 21. When it is desired to use the mobile terminal 200, the mobile terminal 200 may be placed on the supporter 33; when the mobile terminal 200 is wirelessly connected (for example, connected via bluetooth) to the HUB body 22, the charging wires may be respectively connected to the mobile terminal 200 and the HUB body 22 for power supply; when the mobile terminal 200 and the HUB body 22 are connected by a data line, the data line can be powered simultaneously. Meanwhile, the first control switch 222 can be used to control the power on or off of the connection socket 221 to control the connection of the HUB body 22 with the mobile terminal 200.

Referring to fig. 1, 2 and 4-8, in one embodiment, the HUB assembly 20 includes a data line 223 electrically connected to the HUB body 22, and the data line 223 is provided with a second control switch 224. When the mobile terminal 200 needs to be used, the mobile terminal 200 may be placed on the supporting member 33, and then the data line 223 may be plugged into the connection port of the mobile terminal 200; when connection is not required, the data line 223 may be unplugged from the mobile terminal 200 and the data line 223 may be received at the intersection of the keypad assembly 10 and the housing 21. Wherein the second control switch 224 can control the connection of the data line 223 with the mobile terminal 200.

Referring to fig. 1 to 8, in an embodiment, the supporting member 33 is provided with a magnetic member 35 for attracting the mobile terminal 200. Through setting up magnetism on supporting piece 33 and inhaling piece 35, when mobile terminal 200 placed on supporting piece 33, magnetism is inhaled piece 35 and can is exerted the adsorption affinity to mobile terminal 200 to make mobile terminal 200 more stable locate on supporting piece 33. Specifically, the magnetic member 35 may employ a permanent magnet, a magnet, or the like.

Referring to fig. 1 to 8, in one embodiment, the surfaces of the supporting member 33 and the connecting member 32 are covered with a protective sleeve 36. By covering the protective sleeve 36 on the surfaces of the supporting piece 33 and the connecting piece 32, the mobile equipment is contacted with the protective sleeve 36 when being placed on the supporting piece 33, and the problems of collision, abrasion and the like between the mobile equipment and the supporting piece 33 and the connecting piece 32 are prevented. Meanwhile, the protective sleeve 36 can cover the magnetic attraction piece 35, the second rotating shaft component 31 and the third rotating shaft component 34, so as to improve the aesthetic degree of the tablet personal computer protection device 100 with the expansion and support functions. Specifically, the protective sheath 36 may employ PU (polyurethane) leather, a silicone layer, a rubber layer, or the like.

Referring to fig. 1 to 8, in an embodiment, the supporting member 33 is formed with an avoiding hole 331 for exposing a camera of the mobile terminal 200. When the mobile terminal 200 is placed on the supporting member 33, the camera of the mobile terminal 200 may be exposed out of the supporting member 33 through the avoiding hole 331, so as to prevent the supporting member 33 from capturing an image of the mobile terminal 200. Specifically, a protective cover 332 may be provided at the hole edge of the avoiding hole 331 to prevent the wear of the camera.

Referring to fig. 1 to 8, in one embodiment, a protective pad 24 is disposed on an outer surface of the housing 21. When the mobile terminal 200 is disposed on the holder 33 and rotated to the closed state with the holder 33, the bottom of the mobile terminal 200 may collide with the housing 21; by providing the protective pad 24 on the housing 21, the mobile terminal 200 will impact on the protective pad 24 without rigidly colliding with the housing 21, avoiding damage to the mobile terminal 200. It is understood that the protective pad 24 may be made of a cushioning energy absorbing material, such as a silicone pad, a polyurethane pad, a foam pad, etc.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (10)

1. A tablet personal computer protection device with expansion and support functions is used for connecting a mobile terminal, and is characterized by comprising:

a keyboard assembly;

the keyboard assembly comprises a keyboard assembly, a HUB body and a keyboard assembly, wherein the keyboard assembly comprises a shell, a HUB body arranged in the shell and a first rotating shaft assembly arranged on the shell;

a blade assembly rotatable about a center of rotation of the first rotation axis assembly, the blade assembly having a closed state rotated to cover a surface of the keyboard assembly and an open state rotated away from the surface of the keyboard assembly; the layer board subassembly includes second pivot subassembly, connecting piece and is used for placing mobile terminal's supporting piece, the one end of connecting piece connect in first pivot subassembly, the other end of connecting piece connect in the second pivot subassembly, supporting piece can wind the center of rotation of second pivot subassembly rotates.

2. The tablet personal computer protection device with expansion and support functions of claim 1, wherein: the first rotating shaft assembly comprises a rotating piece, a first screw shaft and a positioning piece, the first screw shaft is provided with a rotating shaft part and a screw part, the positioning piece is arranged on the screw part, the rotating piece is arranged on the rotating shaft part, and the rotating piece is connected to the connecting piece; the screw rod part screw thread connecting device is characterized in that a containing groove used for containing the locating piece is formed in the shell, a threaded hole matched with the screw rod part in a threaded mode is formed in the inner side wall of the containing groove, and the locating piece is arranged in the containing groove so that the screw rod part can be in threaded connection with the threaded hole.

3. The tablet personal computer protection device with expansion and support functions of claim 1, wherein: the second rotating shaft assembly comprises an upper hinge, a lower hinge and a second screw shaft, and the second screw shaft penetrates through the upper hinge and the lower hinge and is in rotating fit with the upper hinge and the lower hinge; the upper hinge is connected to the supporting piece, and the lower hinge is connected to the connecting piece.

4. The tablet personal computer protection device with expansion and support functions of claim 3, wherein: the supporting plate assembly further comprises a third rotating shaft assembly, the third rotating shaft assembly comprises an upper rotating shaft piece, a lower rotating shaft piece and a rotating shaft, and the rotating shaft penetrates through the upper rotating shaft piece and the lower rotating shaft piece and is in rotating fit with the upper rotating shaft piece and the lower rotating shaft piece; the upper rotating shaft piece is connected to the supporting piece, and the lower rotating shaft piece is connected to the connecting piece.

5. The tablet personal computer protection device with expansion and support functions as claimed in any one of claims 1 or 4, wherein: the HUB body have be used for with the connection socket that the mobile terminal line is connected, still be equipped with on the HUB body with the first control switch that connection socket looks electrical connection, connection socket with first control switch expose in the shell.

6. The tablet personal computer protection device with expansion and support functions of any one of claims 1 or 4, wherein: the HUB assembly comprises a data line electrically connected with the HUB body, and a second control switch is arranged on the data line.

7. The tablet personal computer protection device with expansion and support functions of any one of claims 1 or 4, wherein: the supporting piece is provided with a magnetic suction piece used for adsorbing the mobile terminal.

8. The tablet personal computer protection device with expansion and support functions as claimed in any one of claims 1 or 4, wherein: and protective sleeves are covered on the surfaces of the supporting piece and the connecting piece.

9. The tablet personal computer protection device with expansion and support functions of any one of claims 1 or 4, wherein: and the supporting piece is provided with a avoiding hole for exposing the camera of the mobile terminal.

10. The tablet personal computer protection device with expansion and support functions of any one of claims 1 or 4, wherein: the outer surface of the shell is provided with a protective pad, and the protective pad is used for protecting the mobile terminal when the supporting plate assembly rotates to a covering state.

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