Expansion screen

Abstract

An expansion screen disclosed by the present invention comprises a screen main body and a master control device, the screen main body comprises a shell, a display assembly and a first connector, the display assembly is installed on the shell, one side of the shell away from the display assembly is provided with an installation portion, and the first connector is arranged on the installation portion and electrically connected with the display assembly; the main control device is provided with a magnetic attraction part and a second connector arranged on the magnetic attraction part, the magnetic attraction part is connected with the mounting part in a magnetic attraction mode, the second connector is electrically connected with the first connector, and a control circuit and a power circuit connected with the control circuit are arranged in the main control device. And the control circuit is electrically connected with the second connector. According to the technical scheme, the thickness of the screen body can be reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of display screens, and in particular to an extended screen. Background Art

[0002] The extended screen is usually used as a secondary screen for a computer or notebook, and can also be connected to a mobile phone, tablet or game console as a large-screen entertainment device, providing users with a larger screen space and a more convenient working experience. Since various circuits (such as power circuits and control circuits, etc.) are generally required in the extended screen, in order to meet the installation requirements of the circuit, the shell size is generally set larger so that there is more space in the shell to accommodate the circuit. However, this will make the extended screen thicker and heavier, which is neither convenient for installation and use nor easy to carry. Summary of the invention

[0003] The main purpose of the present invention is to provide an extended screen, aiming to reduce the thickness of the screen body.

[0004] To achieve the above object, the extended screen proposed by the present invention includes:

[0005] A screen body, comprising a housing, a display assembly and a first connector, wherein the display assembly is mounted on the housing, a mounting portion is provided on a side of the housing away from the display assembly, and the first connector is provided on the mounting portion and electrically connected to the display assembly; and

[0006] The main control device comprises a magnetic attraction portion and a second connector arranged on the magnetic attraction portion, the magnetic attraction portion is magnetically connected to the mounting portion, the second connector is electrically connected to the first connector, a control circuit and a power supply circuit connected to the control circuit are arranged in the main control device, and the control circuit is electrically connected to the second connector.

[0007] Optionally, the mounting portion is provided with a plurality of first magnets, the plurality of first magnets are distributed at intervals along the circumference of the first connector, and the magnetic attraction portion is provided with a plurality of second magnets, the plurality of second magnets correspond one-to-one to the plurality of first magnets.

[0008] Optionally, the first connector includes a plurality of conductive contacts, and the second connector includes a plurality of spring pins, and the plurality of spring pins correspond one-to-one to the plurality of conductive contacts.

[0009] Optionally, the second connector further includes a mounting plate and a cable connector disposed on the mounting plate, the cable connector is electrically connected to the control circuit, and a plurality of spring pins are mounted on a side of the mounting plate away from the cable connector.

[0010] Optionally, the main control device includes a shell and a plurality of circuit boards arranged in the shell, the bottom wall of the shell is provided with the magnetic attraction part and the second connector, the magnetic attraction part is magnetically connected to the screen body, and the plurality of circuit boards are arranged at intervals in a direction perpendicular to the bottom wall of the shell.

[0011] Optionally, the outer shell includes a shell body and a bottom plate, the bottom plate covers one end of the shell body, the second connector and the magnetic attraction part are arranged on the bottom plate, the bottom plate is provided with a first through hole, and the shell body is provided with a first screw connection part, and the main control device also includes a first screw, and the first screw is screwed to the first screw connection part from the first through hole to lock the bottom plate to the shell body.

[0012] Optionally, a circuit board adjacent to the second connector among the plurality of circuit boards is provided with a second through hole, the first screw passes through the second through hole, and the circuit board abuts between the first screw connection portion and the bottom plate.

[0013] Optionally, the main control device further includes a plurality of connecting columns, and two adjacent circuit boards are fixed by the connecting columns.

[0014] Optionally, the main control device has a display screen, and the display screen is electrically connected to the control circuit.

[0015] Optionally, the shell body is opened at both ends, and the display screen is arranged at one end of the shell body away from the bottom plate.

[0016] Optionally, the main control device has a power interface, a screen projection interface and multiple data interfaces, the power interface is electrically connected to the power circuit, and the screen projection interface and the multiple data interfaces are electrically connected to the control circuit.

[0017] Optionally, the power interface, the screen projection interface and the plurality of expansion interfaces are all located on the periphery of the main control device.

[0018] Optionally, the main control device has a clock chip and a battery for powering the clock chip, the clock chip is electrically connected to the control circuit, the extended screen has an off-screen display mode, and in the off-screen display state, the display component is used to display time.

[0019] The technical solution of the present invention is to separate the screen body and the main control device, and set the power circuit and the control circuit in the main control device, so that the display component can be mainly set on the screen body, which reduces the space occupied by the power circuit and the control circuit on the screen body, and can reduce the thickness of the screen body, which is convenient for users to store and carry. At the same time, the screen body and the main control device can be disassembled and stored separately, which can reduce the space requirements when storing. Moreover, the screen body and the main control device are connected by magnetic suction, which can be convenient for users to disassemble and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 This is a schematic structural diagram of an embodiment of an extended screen of the present invention;

[0022] Figure 2 for Figure 1 An exploded view of the central control unit and the extended screen;

[0023] Figure 3 for Figure 2 The enlarged view of point A in the middle;

[0024] Figure 4 for Figure 1 The structural diagram of the central control device;

[0025] Figure 5 for Figure 4 A cross-sectional view of the central control unit;

[0026] Figure 6 for Figure 4 A schematic diagram of the structure of the central control device from another angle;

[0027] Figure 7 for Figure 6 Exploded view of the central control unit;

[0028] Figure 8 for Figure 7 Schematic diagram of the structure of the middle shell;

[0029] Fig. 9 for Figure 7 A schematic diagram of the structure of the midsole plate from another angle;

[0030] Fig.10 for Figure 7 A schematic structural diagram of the second connector from another angle;

[0031] Fig.11 This is a schematic diagram of the structure of the main control device and the expansion module in an embodiment of the expansion screen of the present invention;

[0032] Fig.12 for Fig.11 Schematic diagram of the structure of the expansion module.

[0033] Description of Figure Numbers:

[0034] 10. Screen body; 11. Shell; 111. Mounting part; 113. First jack; 114. Second jack; 12. Display assembly; 13. First connector; 131. Conductive contact; 20. Main control device; 21. Second magnet; 22. Second connector; 221. Spring ejector pin; 222. Mounting plate; 223. Cable connector; 231. Power interface; 232. Screen projection interface; 233. Expansion interface; 24. Display Screen; 25, outer shell; 251, shell body; 252, first screw connection part; 253, heat dissipation hole; 26, bottom plate; 261, first through hole; 262, second screw connection part; 263, first protrusion; 264, second protrusion; 27, circuit board; 271, second through hole; 281, first screw; 282, annular cover plate; 283, connecting column; 29, battery; 30, expansion module; 31, third connector; 32, data interface.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions, taking "A and / or B as an example", including solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0039] The present invention provides an extended screen.

[0040] In the embodiment of the present invention, Figures 1 to 10 As shown, the extended screen includes a screen body 10 and a main control device 20, the screen body 10 includes a shell 11, a display component 12 and a first connector 13, the display component 12 is installed on the shell 11, and a mounting portion 111 is provided on the side of the shell 11 away from the display component 12, the first connector 13 is provided on the mounting portion 111, and is electrically connected to the display component 12; the main control device 20 has a magnetic portion and a second connector 22 provided on the magnetic portion, the magnetic portion is magnetically connected to the mounting portion 111, the second connector 22 is electrically connected to the first connector 13, a control circuit and a power supply circuit connected to the control circuit are provided in the main control device 20, and the control circuit is electrically connected to the second connector 22.

[0041] Specifically, the display component 12 is used to display images, and can be a liquid crystal display screen 24, an OLED display screen 24 or a Mini LED display screen 24, etc. The display component 12 is connected to the first connector 13 by a flat cable. The specific circuit composition of the power circuit and the control circuit can refer to the prior art, and the present invention will not repeat them one by one. Since the main control device 20 and the screen body 10 are separately arranged, the power circuit and the control circuit are both arranged in the main control device 20. Only the display component 12 and the first connector 13 need to be arranged on the screen body 10, which can simplify the structure of the screen body 10 and reduce the thickness of the screen body 10. Compared with the storage of the whole machine, the screen body 10 is relatively light and thin, which is convenient for storage in the gap, and the overall size of the control device is small, and it can be stored in the corner space. The main control device 20 can be cylindrical, prismatic, elliptical or hemispherical, etc.

[0042] The main control device 20 has a power interface 231 and a screen projection interface 232. The power interface 231 is used to connect a power adapter to power the extended screen. The screen projection interface 232 is used to connect electronic devices such as mobile phones and computers. That is, when the main control device 20 is magnetically connected to the screen body 10, and the first connector 13 is connected to the second connector 22, the screen projection interface 232 is connected to the electronic device, and the screen body 10 can be used as an extended display screen 24 of the electronic device. Of course, in other embodiments, only one interface (such as a Type-C interface) can be set, and power supply and data transmission can be achieved through one interface.

[0043] The technical solution of the present invention is to separate the screen body 10 and the main control device 20, and to set the power circuit and the control circuit in the main control device 20, so that the display component 12 is mainly set on the screen body 10, which reduces the space occupied by the power circuit and the control circuit on the screen body 10, and can reduce the thickness of the screen body 10, which is convenient for users to store and carry. At the same time, the screen body 10 and the main control device 20 can be disassembled and stored separately, which can reduce the space requirements when storing. Moreover, the screen body 10 and the main control device 20 are connected by magnetic attraction, which can be convenient for users to disassemble and use.

[0044] In some embodiments, the mounting portion 111 is provided with a plurality of first magnets, the plurality of first magnets are spaced apart along the circumference of the first connector 13, and the magnetic attraction portion is provided with a plurality of second magnets 21, the plurality of second magnets 21 correspond one to one with the plurality of first magnets. Specifically, the first magnet and the second magnet 21 are both permanent magnets, and the first magnet and the second magnet 21 have opposite magnetic poles facing each other. Such an arrangement can improve the magnetic attraction reliability of the magnetic attraction portion and the mounting portion 111, thereby making the main control device 20 stably installed and ensuring the stable connection between the first connector 13 and the second connector 22.

[0045] In some embodiments, the first connector 13 includes a plurality of conductive contacts 131, and the second connector 22 includes a plurality of spring pins 221, and the plurality of spring pins 221 correspond to the plurality of conductive contacts 131 one by one. Specifically, the conductive contacts 131 are sheet metal and are connected to the connection line. In this way, the thickness of the first connector 13 can be thinner, and the space occupied by the first connector 13 in the thickness direction of the screen body 10 can be reduced, which is conducive to further reducing the thickness of the screen body 10. The second connector 22 uses spring pins 221. When the control device is magnetically attracted to the screen body 10, the spring pins 221 can be pressed against the conductive contacts 131 to ensure that the first connector 13 and the second connector 22 are connected stably. Of course, in other embodiments, the first connector 13 includes a plurality of conductive sockets, and the second connector 22 has a plurality of conductive pins, and each conductive pin is correspondingly plugged into a conductive socket.

[0046] In some embodiments, the second connector 22 further includes a mounting plate 222 and a cable connector 223 disposed on the mounting plate 222, the cable connector 223 is electrically connected to the control circuit, and a plurality of spring ejectors 221 are mounted on the side of the mounting plate 222 away from the cable connector 223. Specifically, a PCB board can be used as the mounting plate 222, and the cable connector 223 is connected to the control circuit via a flexible circuit board. In this way, the plurality of spring ejectors 221 are integrated on the mounting plate 222, so that the mounting plate 222 and the plurality of spring ejectors 221 form a module, which is more convenient when the main control device 20 is assembled as a whole, and at the same time, the spring ejectors 221 can be reliably installed.

[0047] In some embodiments, the mounting portion 111 is provided with an anti-foolproof structure, and the main control device 20 has a matching portion adapted to the anti-foolproof structure, so that the main control device 20 and the mounting portion 111 have a unique match, which can prevent the main control device 20 and the screen body 10 from being installed incorrectly.

[0048] Optionally, the foolproof structure is provided with a first jack 113 and a second jack 114, the first jack 113 and the second jack 114 are spaced apart along the circumference of the first connector 13, the inner diameter of the first jack 113 is larger than the inner diameter of the second jack 114, and the matching portion includes a first convex portion 263 adapted to the first jack 113 and a second convex portion 264 adapted to the second jack 114. Specifically, the outer diameter of the first convex portion 263 is larger than the outer diameter of the second convex portion 264, and only when the first convex portion 263 is inserted into the first jack 113 and the second convex portion 264 is inserted into the second jack 114, the main control device 20 and the mounting portion 111 are in the correct position. The first jack 113 and the second jack 114 are both round holes, and the first convex portion 263 and the second convex portion 264 are both cylinders. With such a configuration, while effectively realizing foolproofing, the structure of the foolproof structure and the matching portion can be simplified. By providing the first plug hole 113 and the second plug hole 114 on the fool-proof structure, it is possible to avoid forming a protruding structure on the screen body 10, making it easier for users to store and carry the screen.

[0049] Of course, in other embodiments, a strip groove can be set in the anti-fool structure, and a strip convex rib adapted to the strip groove can be set in the matching part; or a non-rotationally symmetrical graphic groove such as a trapezoidal groove or a semicircular groove can be set in the anti-fool structure, and the matching part can be adapted to the non-rotationally symmetrical graphic groove.

[0050] In some embodiments, the main control device 20 has a power interface 231, a screen projection interface 232 and multiple expansion interfaces 233. The power interface 231 is electrically connected to the power circuit, and the screen projection interface 232 and multiple expansion interfaces 233 are electrically connected to the control circuit. Specifically, the power interface 231 is used to connect a power adapter, which can be a Type-C interface or other types of interfaces. The screen projection interface 232 is used to connect an electronic device, which can be a Type-C interface or an HDMI interface, etc. When the screen projection interface 232 is a Type-C interface, power transmission between the electronic device and the screen projection interface 232 can also be achieved. The expansion interface 233 can be a USB-A interface, a Type-C interface or other data transmission interface, which is used to connect peripherals such as a mouse, keyboard, and U disk, and can also be used to charge other electronic devices (such as mobile phones). By setting multiple expansion interfaces 233, it is easy to connect peripherals and improve the convenience of use.

[0051] In some embodiments, the main control device 20 is provided with a display screen 24, which is electrically connected to the control circuit. When in use, the display screen 24 can display the working status of the main control device 20 (for example, displaying the input / output power of the power supply circuit, or when a temperature sensing element is set in the main control device 20, the display screen 24 can display temperature information) or display images, etc.

[0052] In some embodiments, the first connector 13 and the display screen 24 are disposed at both ends of the main control device 20, and the power interface 231, the screen projection interface 232, and the plurality of expansion interfaces 233 are all disposed on the peripheral side of the main control device 20. In this way, more expansion interfaces 233 can be disposed on the peripheral side of the main control device 20 to improve the functionality of the main control device 20. Of course, in other embodiments, the display screen 24 can also be disposed on the peripheral side of the main control device 20.

[0053] In some embodiments, a mounting portion 111 is provided on the back of the screen body 10, the display screen 24 is located at the top of the main control device 20, the second connector 22 is located at the bottom of the main control device 20, and the bottom of the main control device 20 is magnetically connected to the mounting portion 111. When in use, the main control device 20 is hidden at the back of the screen body 10, which can reduce the possibility of the user touching the main control device 20 and ensure stable data transmission during use. In addition, the front of the screen body 10 is kept tidy to prevent the power cord and the data cable from being exposed on the front side of the screen body 10 and affecting the user's operation. Of course, in other embodiments, the mounting portion 111 can also be provided on the side of the screen body 10.

[0054] In some embodiments, the main control device 20 includes a housing 25 and a plurality of circuit boards 27 disposed in the housing 25, the bottom wall of the housing 25 is provided with a magnetic attraction portion and a second connector 22, the magnetic attraction portion is magnetically connected to the screen body 10, and the plurality of circuit boards 27 are arranged at intervals in a direction perpendicular to the bottom wall of the housing 25. Specifically, the circuit boards 27 are substantially parallel to the bottom wall of the housing 25, and such an arrangement can make the width of a single circuit board 27 smaller, and the width of the main control device 20 can be reduced, which is conducive to reducing the size of the main control device 20.

[0055] Optionally, the circuit board 27 where the control circuit is located is adjacent to the second connector 22, and the circuit board 27 where the power circuit is located is located on the side of the circuit board 27 where the control circuit is located away from the second connector 22. This facilitates the connection between the second connector 22 and the control circuit and can reduce wiring in the main control device 20.

[0056] In some embodiments, a peripheral wall of the housing 25 is provided with heat dissipation holes 253 , and the heat dissipation holes 253 are communicated with the inner cavity of the housing 25 , so that the heat dissipation effect of the main control device 20 can be improved.

[0057] In some embodiments, the housing 25 includes a housing body 251 and a bottom plate 26. The housing body 251 is open at both ends. The bottom plate 26 covers one end of the housing body 251. The display screen 24 is disposed at the other end of the housing body 251 (the display screen 24 is disposed at the end of the housing body 251 away from the bottom plate 26). The second connector 22 and the magnetic attraction portion are disposed on the bottom plate 26. A plurality of interface vias are disposed on the circumference of the housing body 251. The bottom plate 26 is the bottom wall of the housing 25. During assembly, the display screen 24 can be first installed at one end of the housing body 251, and then a plurality of circuit boards 27 can be installed in the housing body 251 from the other end of the housing body 251. After the magnetic attraction portion and the second connector 22 are disposed on the cover plate, the cover plate can be covered with the housing body 251. This makes the housing 25 simple in structure and facilitates assembly of the main control device 20.

[0058] Optionally, the bottom plate 26 is provided with a first through hole 261, the shell body 251 is provided with a first screw connection portion 252, the main control device 20 further includes a first screw 281 and an annular cover plate 282, the first screw 281 is located in the first through hole 261, and is screwed to the first screw connection portion 252 to lock the bottom plate 26 to the shell body 251, the annular cover plate 282 is located on the side of the bottom plate 26 away from the circuit board 27, and covers the first through hole 261, and the first connector 13 is located in the inner circle of the annular cover plate 282. In this way, the first through hole 261 and the first screw 281 can be prevented from being exposed to the outside, which can improve the sealing performance and the appearance effect.

[0059] In some embodiments, a circuit board 27 adjacent to the second connector 22 among the plurality of circuit boards 27 is provided with a second through hole 271, the first screw 281 passes through the second through hole 271, and the circuit board 27 abuts between the first screw connection portion 252 and the bottom plate 26. In this way, the circuit board 27 can be effectively fixed by utilizing the connection structure between the shell body 251 and the bottom plate 26, thereby improving the installation reliability of the circuit board 27, and avoiding the need for an additional fixing structure in the shell body 251, thereby simplifying the structure of the shell 25.

[0060] In some embodiments, the main control device 20 also includes a plurality of connecting columns 283, and two adjacent circuit boards 27 are supported by the connecting columns 283, that is, one end of the connecting column 283 abuts against the corresponding circuit board 27 and is fixed by a screw, and the other end of the connecting column 283 abuts against the other circuit board 27 and is fixed by a screw. In this way, only one of the circuit boards 27 needs to be fixed to the main shell 11 to achieve the fixation of all the circuit boards 27, which can reduce the fixing structure for installing the circuit board 27 on the main shell 11 and simplify the structure of the shell 25.

[0061] In some embodiments, the bottom plate 26 is provided with a second screw connection portion 262 , and the mounting plate 222 is fixed to the second screw connection portion 262 by a second screw, so that the first connector 13 can be reliably connected.

[0062] In some embodiments, the main control device 20 has a clock chip and a battery 29 for powering the clock chip. The clock chip is electrically connected to the control circuit. The extended screen has an off-screen display mode. In the off-screen display state, the display component 12 is used to display the time. Specifically, the battery 29 is only used to power the clock chip so that the clock chip can continue to work even when the extended screen is powered off, thereby ensuring the accuracy of the time. In the off-screen display state, the extended screen is powered by a power adapter or an electronic device, and the control circuit controls the display component 12 to display time information according to the signal of the clock chip.

[0063] In some embodiments, reference Fig.11 and Fig.12 The expansion screen further includes an expansion module 30, the expansion module 30 has a third connector 31 and at least one data interface 32, and the expansion module 30 is magnetically connected to the main control device 20. The main control device 20 has a first use state and a second use state. In the first use state, the magnetic attraction portion is connected to the mounting portion 111, and the second connector 22 is electrically connected to the first connector 13; in the second use state, the magnetic attraction portion is connected to the expansion module 30, and the second connector 22 is electrically connected to the third connector 31, so that the main control device 20 and the expansion module 30 are used as an expansion dock.

[0064] Specifically, after the main control device 20 is removed from the screen body 10, the main control device 20 and the expansion module 30 can be combined together, so that the second connector 22 and the third connector 31 are electrically connected. At this time, the main control device 20 and the expansion module 30 can be used as an expansion dock, that is, the number and type of interfaces can be increased through the expansion module 30 to improve functionality. Among them, the data interface 32 can be an HDMI interface, a Type-C interface, a USB-A interface or other types of interfaces. The structure of the third connector 31 can refer to the structure of the first connector 13.

[0065] By adopting the split design of the screen body 10, the main control device 20 and the expansion module 30, the power circuit and the control circuit are set in the main control device 20, and the data interface 32 is set in the expansion module 30, so that the main control device 20 can be combined with the screen body 10 to use the screen body 10 as an extended display of the electronic device, and can also be combined with the expansion module 30 to use the main control device 20 and the expansion module 30 as an expansion dock, which greatly improves the functionality of the extended screen and is convenient for users to use. Optionally, the expansion module 30 has a third jack adapted to the first protrusion 263 and a fourth jack adapted to the second protrusion 264.

[0066] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An extended screen, characterized in that: include: The screen body comprises a housing, a display assembly and a first connector, wherein the display assembly is mounted on the housing, a mounting portion is provided on a side of the housing away from the display assembly, and the first connector is provided on the mounting portion and is electrically connected to the display assembly; as well as The main control device comprises a magnetic attraction portion and a second connector arranged on the magnetic attraction portion, the magnetic attraction portion is magnetically connected to the mounting portion, the second connector is electrically connected to the first connector, a control circuit and a power supply circuit connected to the control circuit are arranged in the main control device, and the control circuit is electrically connected to the second connector.

2. The extended screen according to claim 1, characterized in that: The mounting portion is provided with a plurality of first magnets, which are spaced apart along the circumference of the first connector, and the magnetic attraction portion is provided with a plurality of second magnets, which correspond one-to-one to the plurality of first magnets.

3. The extended screen according to claim 2, characterized in that: The first connector includes a plurality of conductive contacts, and the second connector includes a plurality of spring pins, and the plurality of spring pins correspond to the plurality of conductive contacts one by one.

4. The extended screen according to claim 3, characterized in that: The second connector also includes a mounting plate and a cable connector disposed on the mounting plate, the cable connector is electrically connected to the control circuit, and a plurality of spring pins are mounted on a side of the mounting plate away from the cable connector.

5. The extended screen according to claim 1, characterized in that: The main control device includes a shell and a plurality of circuit boards arranged in the shell. The bottom wall of the shell is provided with the magnetic attraction portion and the second connector. The magnetic attraction portion is magnetically connected to the screen body. The plurality of circuit boards are arranged at intervals in a direction perpendicular to the bottom wall of the shell.

6. The extended screen according to claim 5, characterized in that: The shell includes a shell body and a bottom plate, the bottom plate covers one end of the shell body, the second connector and the magnetic attraction part are arranged on the bottom plate, the bottom plate is provided with a first through hole, and the shell body is provided with a first screw connection part, and the main control device also includes a first screw, and the first screw is screwed to the first screw connection part from the first through hole to lock the bottom plate to the shell body.

7. The extended screen according to claim 6, characterized in that: A circuit board adjacent to the second connector among the plurality of circuit boards is provided with a second through hole, the first screw passes through the second through hole, and the circuit board abuts between the first screw connection portion and the bottom plate; The main control device further comprises a plurality of connection posts, and two adjacent circuit boards are fixed together by the connection posts.

8. The extended screen according to claim 6, characterized in that: The main control device has a display screen, which is electrically connected to the control circuit; the shell body is arranged with openings at both ends, and the display screen is arranged at one end of the shell body away from the bottom plate.

9. The extended screen according to claim 1, characterized in that: The main control device has a power interface, a screen projection interface and multiple data interfaces, the power interface is electrically connected to the power circuit, the screen projection interface and the multiple data interfaces are electrically connected to the control circuit; the power interface, the screen projection interface and the multiple expansion interfaces are all located on the periphery of the main control device.

10. The extended screen according to claim 1, characterized in that: The main control device has a clock chip and a battery for powering the clock chip, the clock chip is electrically connected to the control circuit, the extended screen has an off-screen display mode, and in the off-screen display state, the display component is used to display time.

Images