keyboard

Abstract

The utility model discloses a keyboard is provided with remote communication module, near field communication module, intelligent terminal support body, wireless charging module and screen projection hot key assembly on the keyboard main part, and the remote communication module and near field communication module are arranged in the keyboard, and the personal intelligent terminal can be connected with the screen projection equipment quickly under the assistance of near field signal interaction function of remote signal, and the charging unit is arranged in the personal intelligent terminal support structure to maintain the electric quantity, and the user can input the screen projection control instruction quickly through the screen projection hot key assembly, the connection inconvenience, the inflexible use and the experience not smooth problem of traditional personal intelligent terminal when screen projection are solved, the operation convenience and the use comfort degree of user are enhanced, thereby the more excellent screen projection experience is realized.

Description

Technical Field

[0001] This utility model relates to the field of external device technology, specifically to a keyboard. Background Technology

[0002] Currently, personal smart terminals such as mobile phones or tablets can connect to displays and project their screens via network or wired connections. However, when users project their screens, a handshake is usually required between the personal terminal and the display to establish a connection. This can be inconvenient for users unfamiliar with the connection process or those projecting onto a target display for the first time, requiring a considerable amount of time and effort. Furthermore, screen projection often involves additional operations on the personal smart terminal, which can rapidly deplete its battery over time, impacting its continued usability after projection. Therefore, there is an urgent need for a device that improves the screen projection experience for personal smart terminals. Utility Model Content

[0003] The keyboard provided in the embodiments of this utility model aims to solve the problem of poor user experience when personal smart terminals are projected onto a display screen under the prior art.

[0004] In a first aspect, this utility model provides a keyboard, comprising: a keyboard body; a remote communication module disposed inside the keyboard body, the remote communication module being used for data transmission with a projection display device and / or a personal smart terminal; a near-field communication module disposed in the keyboard body, the near-field communication module being used for near-field signal interaction with the personal smart terminal to remotely interconnect the personal smart terminal with the projection display device; a smart terminal support body disposed on the top of the keyboard body, the smart terminal support body being used to support the personal smart terminal facing the user; a wireless charging module disposed inside the smart terminal support body, the wireless charging module being used to wirelessly charge the personal smart terminal; and a projection hotkey assembly disposed on the top of the keyboard body, the projection hotkey assembly having several adjacent convenient interactive buttons, wherein the convenient interactive buttons are used by the user to input projection control commands.

[0005] In the keyboard provided by this utility model, a main input area is provided on one side of the top of the keyboard body. The near-field communication module, the remote communication module, the smart terminal support and the screen projection hotkey component are all located on the side of the keyboard body away from the main input area. The main input area is used to provide users with text interaction functions.

[0006] In the keyboard provided by this utility model, the screen projection hotkey component, the smart terminal support body, and the near-field communication module are arranged sequentially along the length direction of the keyboard body.

[0007] In the keyboard provided by this utility model, the portable interactive key includes a plurality of first type keys. The first type keys have a downwardly recessed finger guide groove in the center. The first type keys are used to provide users with customizable shortcut control functions.

[0008] In the keyboard provided by this utility model, the finger guide groove is recessed from its own groove edge toward the groove center.

[0009] In the keyboard provided by this utility model, the portable interactive key also includes a second type of key. A plurality of first type keys are arranged in an array to form a hotkey area. The hotkey area is located close to the smart terminal support. The second type of key is located on the side of the hotkey area away from the smart terminal support. The second type of key is used to cut off the data transmission between the personal smart terminal and the projection display device.

[0010] In the keyboard provided by this utility model, the second type of key extends in the direction toward the main input area.

[0011] In the keyboard provided by this utility model, the top of the smart terminal support and the keyboard body is also provided with a support receiving groove that is recessed from top to bottom. The end of the smart terminal support near the main input area is rotatably disposed on the inner wall of the receiving groove near the main input area. When the smart terminal support is rotated downward to its limit, the smart terminal support is disposed in the support receiving groove.

[0012] The keyboard provided by this utility model also includes a multimedia external port component, which is disposed along the periphery of the keyboard body away from the main input area.

[0013] The keyboard provided by this utility model also includes a stop bump, which is disposed between the smart terminal support and the main input area.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In this invention, a remote communication module, a near-field communication module, a smart terminal support, a wireless charging module, and a projection hotkey component are incorporated into the keyboard body. The remote and near-field communication modules within the keyboard enable the personal smart terminal to quickly establish a connection with the projection device via near-field signal interaction. A charging unit within the personal smart terminal support structure maintains its power. The projection hotkey component allows users to quickly input projection control commands. This solution addresses the problems of inconvenient connection, inflexible use, and clunky experience associated with traditional personal smart terminals during projection, enhancing user convenience and comfort, and ultimately achieving a superior projection experience. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional schematic diagram of the keyboard in use according to an embodiment of the present utility model;

[0018] Figure 2 This is a three-dimensional schematic diagram of the keyboard in its stowed state according to an embodiment of the present utility model.

[0019] Figure 3 This is another three-dimensional schematic diagram of the keyboard in use according to an embodiment of the present invention;

[0020] Figure 4 This is a top view of the keyboard in its stowed state according to an embodiment of the present invention;

[0021] Figure 5 This is a bottom view of the keyboard in its stowed state according to an embodiment of the present invention;

[0022] Figure 6 This is a rear view of the keyboard in its stowed state according to an embodiment of the present utility model.

[0023] Figure 7 This is a front view of the smart terminal support body of the keyboard according to an embodiment of the present utility model;

[0024] Figure 8 This is a rear view of the smart terminal support body of the keyboard according to an embodiment of the present utility model;

[0025] Figure 9 This is a cross-sectional view of the screen projection hotkey component area of ​​the keyboard in an embodiment of this utility model;

[0026] Figure 10 This is a cross-sectional view of the smart terminal support area of ​​the keyboard in an embodiment of this utility model;

[0027] Figure 11 This is a cross-sectional view of the support housing area of ​​the keyboard according to an embodiment of the present invention.

[0028] Figure label explanation:

[0029] 10. Keyboard body; 11. Main input area; 12. Support housing slot; 13. Stop protrusion; 15. Angle positioning mechanism; 16. Elevator bracket; 17. Axis hole;

[0030] 20. Near Field Communication Module;

[0031] 30. Smart terminal support body; 31. Rotating shaft; 32. Support component;

[0032] 40. Wireless charging module;

[0033] 50. Screen mirroring hotkey component; 51. Type I button; 52. Type II button; 53. Finger guide groove; 54. Mechanical micro switch; 55. Keycap;

[0034] 60. Multimedia external port assembly; 61. Power interface; 62. HDMI interface; 63. TYPE-C interface; 64. End cover. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0037] This utility model discloses a keyboard designed to solve the problem of poor user experience when projecting personal smart terminals onto a monitor in the prior art. (See reference...) Figures 1 to 11The keyboard includes: a keyboard body 10; a remote communication module located inside the keyboard body 10, used for data transmission with a projection display device and / or a personal smart terminal; a near-field communication module 20 located in the keyboard body 10, used for near-field signal interaction with the personal smart terminal to remotely interconnect the personal smart terminal and the projection display device; a smart terminal support 30 located on the top of the keyboard body 10, used to support the personal smart terminal facing the user; a wireless charging module 40 located inside the smart terminal support 30, used for wirelessly charging the personal smart terminal; and a projection hotkey assembly 50 located on the top of the keyboard body 10, the hotkey assembly 50 having several adjacent convenient interactive keys, wherein the convenient interactive keys are used for the user to input projection control commands. This keyboard achieves innovative applications by integrating a multi-functional module into a traditional keyboard body 10. The remote communication module is built into the keyboard body 10. This module uses a conventional WiFi network protocol to establish a data channel with the projection display device and personal smart terminal to achieve audio and video streaming. The personal smart terminal refers to mobile phones or tablets, etc. The near-field communication module 20 is embedded in the upper right corner of the keyboard body 10. Its NFC chip and antenna operate based on the ISO / IEC 14443 standard. When an NFC-enabled smart terminal is near, it automatically exchanges the device identification code and projection command to complete the device binding. Subsequently, a simple touch can trigger the remote communication module to project the smart terminal screen onto the display device, forming a "near-field trigger - remote transmission" interconnection mechanism. The smart terminal support 30 is fixed in the top center of the keyboard body 10. Its design not only takes ergonomics into account for easy user operation, but also actively keeps the personal smart terminal at a convenient angle for use. The wireless charging module 40 is integrated inside the support. When working, it outputs an electromagnetic field. When the device is placed, the coil is precisely aligned to achieve electromagnetic induction charging. The wireless charging module 40, together with the keyboard's control chip, also performs charging detection, power adjustment, and overcharge protection for the personal smart terminal to ensure the safety and efficiency of the charging process. The screen mirroring hotkey component 50 is located in the upper left area of ​​the keyboard body 10, with several convenient interactive buttons arranged in an array. These buttons, by default, provide various functions such as screen mirroring control commands, play / pause, volume adjustment, and mute, and are connected to the keyboard control board via circuitry. When the user presses a convenient interactive button, the remote communication module sends the corresponding preset command to the screen mirroring device to control its various functions.

[0038] In this invention, a remote communication module, a near-field communication module 20, a smart terminal support 30, a wireless charging module 40, and a projection hotkey component 50 are installed on the keyboard body 10. By incorporating the remote communication module and near-field communication module 20 into the keyboard, the personal smart terminal can quickly establish a connection with the projection device with the assistance of near-field signal interaction. Furthermore, a charging unit is installed within the personal smart terminal support structure to maintain its power. Finally, the projection hotkey component 50 allows users to quickly input projection control commands. This solves the problems of inconvenient connection, inflexible use, and unsmooth experience that exist in traditional personal smart terminals when projecting, enhancing user convenience and comfort, and thus achieving a superior projection experience.

[0039] In one embodiment, reference is made to Figures 1 to 4 The keyboard body 10 has a main input area 11 on one side. The near-field communication module 20, the remote communication module, the smart terminal support 30, and the projection hotkey component 50 are all located on the side of the keyboard body 10 away from the main input area 11. The main input area 11 is used to provide users with text interaction functions. The main input area 11 on the keyboard body 10 is primarily used for user text input and interactive operations, and is the core area for users to perform daily operations such as text processing and command input. Specifically, the main input area 11 is the working area of ​​an 87-key standard keyboard. The near-field communication module 20, the remote communication module, the smart terminal support 30, and the projection hotkey component 50 are all arranged on the other side of the keyboard body 10 away from the main input area 11. This layout takes into account the need for ease of operation and a clean interface, aiming to ensure that users are not disturbed by peripheral functional modules while performing daily operations such as text input. Specifically, when the user is using the system, the main input area 11 is close to the user. While the user is operating on the main input area 11, other functional modules are far away from the user, so they will not interfere with the user's typing behavior and provide the user with a clean text interaction environment. Other functional modules are far away from the user and integrated together. Because they are relatively far away from the user, the user can complete operations such as charging and screen projection without moving their eyes significantly, which significantly improves the efficiency of human-computer interaction.

[0040] Furthermore, referring to Figures 1 to 4The projection hotkey component 50, the smart terminal support 30, and the near-field communication module 20 are arranged sequentially along the length of the keyboard body 10. Specifically, from the user's perspective, the projection hotkey component 50 is fixed to the front left area of ​​the keyboard, the smart terminal support 30 is centrally located, and the near-field communication module 20 is installed in the front right area of ​​the keyboard. This layout is based on ergonomic design principles, aiming to optimize operational convenience and space utilization. The projection hotkey component 50 is located on the front left side of the keyboard, close to the user's frequently used left-hand operating area, for quick triggering of relevant control commands. Considering that users may also give presentations or operate the mouse with their right hand during projection, the projection hotkey component 50 is placed on the front left of the keyboard. The near-field communication module 20, located on the front right, facilitates NFC interaction for most users who habitually hold their phones with their right hand, and allows the phone to be placed on the nearby smart terminal support 30 for support and fixation after NFC interaction. The projection hotkey component 50, the smart terminal support body 30 and the near-field communication module 20 are arranged sequentially along the length of the keyboard body 10, which realizes efficient use of space layout. Combined with reasonable ergonomic design, it helps to improve the convenience of operation and the level of interface integration.

[0041] In one embodiment, reference is made to Figures 1 to 4The portable interactive button includes multiple first-type buttons 51. Each first-type button 51 has a recessed finger guide groove 53 in its center, providing users with customizable shortcut control functions. The finger guide groove 53 is recessed from its edge towards its center. The interactive button includes first-type buttons 51 and second-type buttons 52. The first-type buttons 51 of the interactive button have a recessed finger guide groove 53 on their surface. Specifically, the keycap 55 of the first-type button 51 is formed using PBT double-shot injection molding. A bowl-shaped groove is provided in the central area of ​​the keycap 55, and the radius of curvature of this groove is adapted to the fingertip of an adult index finger. When the user operates, for example, while standing and giving a presentation, their arm moves quickly and their finger reaches for a specific function's first-type button 51. At this time, the finger guide groove 53 guides the finger that may not be accurately positioned on the button, allowing the user's fingertip to naturally embed into the groove, thus accurately pressing the keycap 55 and triggering the mechanical microswitch 54 beneath the keycap 55. The finger guide groove 53 provides tactile positioning of the buttons and enhances friction with circular anti-slip textures at the bottom of the groove. These textures, created by laser etching horizontal stripes, prevent fingers from slipping during rapid operations. Each Type I button 51 is connected to a GPIO matrix, allowing users to customize the mapping of the grooved buttons to specific shortcut functions via driver software. This groove structure design improves the accuracy of blind operation of hotkeys, facilitating rapid screen projection commands, such as during standing presentations. The finger guide groove 53 features a gradually concave shape from its edge to its center. As the user's finger slides towards the center, the change in depth creates a distinct tactile sensation, aiding the user in perceiving the operation confirmation point. Furthermore, to further facilitate accurate visual positioning during rapid operations, the inner surface of the finger guide groove 53 undergoes a matte sandblasting process to reduce glare and enhance visual cues for finger positioning.

[0042] Furthermore, referring to Figures 1 to 4 and Figure 9The portable interactive button also includes a second type button 52. Multiple first type buttons 51 are arrayed to form a hotkey area, located near the smart terminal support 30. The second type button 52 is located on the side of the hotkey area away from the smart terminal support 30. The second type button 52 is used to cut off data transmission between the personal smart terminal and the projection display device. The array of multiple first type buttons 51, positioned adjacent to the smart terminal support 30, forms an efficient operating flow. The second type button 52 is located to the left of the hotkey area, away from the smart terminal support 30. It features a differentiated design, being larger than the first type buttons 51, and has a raised silver-gloss coating without recessed grooves. The second type button 52 cuts off the data link between the personal smart terminal and the projection display device by sending a termination signal to the projection motherboard. The second type button 52 extends towards the main input area 11 to improve human interaction efficiency. In the keyboard design of this utility model, the second type of key 52 primarily functions to disconnect the data link between the user's smart terminal and the projection display device. This occurs when the user needs to stop the projection operation, such as when receiving a phone call. To facilitate quick end of projection and immediate answering of the call, this second type of key 52 is provided. The second type of key 52 extends towards the main input area 11 and is longer than the first type of key 51, making it easier for the user to identify and press. Since there are no other keys between it and the main input area 11, accidental touches are reduced. It should also be noted that the second type of key 52, while disconnecting the data link between the user's smart terminal and the projection display device, also disconnects the text input interaction connection of the main input area 11, preventing accidental keyboard touches during phone calls. Furthermore, the second type of key 52 is equipped with a mechanical limit or electronic locking device to prevent accidental touches or unexpected function switching. This extension enables quick start and stop control of screen projection, while the second type of button 52 also provides blind operation tactile identification through its shape difference. Users can clearly distinguish between the first type of button 51 and the second type of button 52 by touch.

[0043] In one embodiment, reference is made to Figures 1 to 4 , Figure 7 , Figure 8 , Figure 10 and Figure 11The smart terminal support 30 and the top of the keyboard body 10 are also provided with a support receiving groove 12 that is recessed from top to bottom. The end of the smart terminal support 30 near the main input area 11 is rotatably mounted on the inner wall of the receiving groove near the main input area 11. When the smart terminal support 30 is rotated downwards to its limit, the smart terminal support 30 is placed in the support receiving groove 12. In order to make the keyboard easier to store and transport when not in use, the top of the keyboard body 10 is provided with a support receiving groove 12 for accommodating the rotatable smart terminal support 30. The groove is a rectangular groove structure, and its bottom surface matches and gap-fits the bottom contour of the smart terminal support 30 so that the smart terminal support can be smoothly rotated into the support receiving groove 12 for storage. The inner wall of the support receiving groove 12 near the main input area 11 is provided with a rotating support structure, which is connected to the smart terminal support 30. A pair of shaft holes 17 are provided at the front edge of the receiving groove, and the edges of the holes have 77° fan-shaped notches to form a plastic locking structure. The bottom of the outer shell of the smart terminal support 30 extends a pivot 31. During assembly, the pivot is pressed into the shaft hole 17 through a notch, allowing the smart terminal support 30 to rotate within the storage slot around the pivot 31. An angle positioning mechanism 15 is also provided on the side of the support housing 12 away from the pivot 31. A rotatable support member 32 is located below the smart terminal support 30. When the support member 32 is connected to the angle positioning mechanism 15, the smart terminal support 30 is fixed at a preset angle position. The angle positioning mechanism 15 consists of multiple adjacent angle positioning slots, each with a semi-circular cross-section, extending along the length of the keyboard. When the support member 32 is placed into the angle positioning slot, its end abuts against the bottom surface of the slot, interacting to provide stable support for the smart terminal support 30. Due to the structural design of the angle positioning groove, the end of the support member 32 is not fixedly connected to it. Therefore, when adjusting and retracting the smart terminal support 30 into the support receiving groove 12, no special structural locking or unlocking is required by the user, making operation more convenient and smooth. This design not only ensures the safety and durability of the support in daily use but also greatly improves the overall practicality and user experience of the device. An auxiliary groove is also provided on the edge of the groove on the side of the support receiving groove 12 away from the pivot 31. This auxiliary groove provides a fingertip for the user to reach into and apply force when removing the smart terminal support 30 from the support receiving groove 12. In addition, a magnet is embedded in the rear wall of the support receiving groove 12, which cooperates with the magnetic sheet inside the shell of the smart terminal support 30 to provide an attractive force, ensuring that the support will not accidentally pop open during transportation in the closed state.

[0044] In one embodiment, reference is made to Figure 6The keyboard of this invention also includes a multimedia external port assembly 60, which is disposed along the periphery of the keyboard body 10 away from the main input area 11. The multimedia external port assembly 60 is arranged around the periphery of the keyboard, that is, along the outer edge of the keyboard on the side away from the main input area 11. This layout fully considers the user's operational convenience and the overall aesthetics of the device. Simultaneously, its distribution away from the main input area 11 avoids cable interference. Furthermore, each interface is also a certain distance from the bottom surface of the keyboard body 10, thereby avoiding friction between the user's hand and the desktop when unplugging the terminals. The multimedia external ports include a power interface 61, an HDMI interface 62, a TYPE-C interface 63, and a USB interface. The HDMI interface 62 is used for direct cable connection to a projection display device, which is suitable for users who require high-definition projection. The TYPE-C interface 63 supports direct connection or power supply between the keyboard and personal smart terminal devices such as tablets and mobile phones. Furthermore, there are no interfaces on the right edge of the keyboard, providing a clean operating area for the user's right hand when operating the mouse, thus improving the user experience. The multimedia external port component 60 configured according to the scheme of this embodiment not only facilitates users to quickly connect various external devices when expanding multimedia functions, but also enhances the multifunctionality of the device and the diversity of applicable scenarios, meets the actual needs of modern multimedia interaction and information transmission, and significantly improves the overall practical value of the keyboard.

[0045] In one embodiment, reference is made to Figures 1 to 4 and Figure 10 The keyboard of this utility model also includes a stop protrusion 13, which is disposed between the smart terminal support 30 and the main input area 11. The stop protrusion 13 is located in the transition area between the smart terminal support 30 and the main input area 11, and its function is to restrict movement in both directions. On the one hand, the stop protrusion 13 prevents the smart terminal from sliding towards the main input area 11, and on the other hand, it also prevents the user's fingers from hitting the bottom of the smart terminal device during the inertial extension process after pressing the key when operating the keyboard, such as when operating the numeric input area and the F5 to F8 keys, causing the charging position to shift.

[0046] The keyboard of this utility model, as shown in the reference... Figure 10 The wireless charging module 40 is installed within two separate housings, forming the main support of the smart terminal support 30. A ribbon cable is located near the hinge 31 of the smart terminal support 30, connecting the wireless charging module 40 to the keyboard's motherboard, which then supplies power to the wireless charging module 40. An anti-slip pad made of silicone is provided on the user-facing housing surface of the smart terminal support 30, working in conjunction with the stop protrusion 13 to position the smart terminal device stably for charging.

[0047] In addition, refer to Figure 1 and Figure 2 An end cap 64 is also provided on the outside of the multimedia external port assembly 60 to provide dust protection when the ports are not in use. (See reference...) Figure 5 A pair of rotatable support brackets 16 are provided on the bottom side of the keyboard body away from the user. When the support brackets 16 are rotated to the point where their ends abut against the support surface below the keyboard, the support brackets 16 increase the angle at which the top surface of the keyboard tilts towards the user, making it more convenient for the user to perform typing input operations and observe the various functional components on the top surface of the keyboard.

[0048] This invention's deeply integrated and rapidly interactive design elevates the keyboard from a simple input tool into a productivity hub, making it particularly suitable for high-frequency cross-device collaboration scenarios such as hybrid offices, smart classrooms, and live streaming control centers. Its core value lies in ending the efficiency losses of the fragmented peripheral era through hardware spatial reconstruction and protocol interconnection.

[0049] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A keyboard, characterized in that include: Keyboard body; A remote communication module is located inside the keyboard body, and the remote communication module is used to transmit data with a projection display device and / or a personal smart terminal. A near-field communication module is provided on the keyboard body. The near-field communication module is used to perform near-field signal interaction with the personal smart terminal, thereby remotely interconnecting the personal smart terminal with the projection display device. A smart terminal support is located on the top of the keyboard body, and the smart terminal support is used to support the personal smart terminal facing the user. A wireless charging module is located inside the smart terminal support body, and the wireless charging module is used to wirelessly charge the personal smart terminal. A screen mirroring hotkey component is located on the top of the keyboard body. The screen mirroring hotkey component has several adjacent convenient interactive buttons, which are used by the user to input screen mirroring control commands.

2. The keyboard of claim 1, wherein, The main input area is located on one side of the top of the keyboard body. The near-field communication module, the remote communication module, the smart terminal support, and the screen projection hotkey component are all located on the side of the keyboard body away from the main input area. The main input area is used to provide users with text interaction functions.

3. The keyboard of claim 2, wherein, The screen projection hotkey component, the smart terminal support, and the near-field communication module are arranged sequentially along the length of the keyboard body.

4. The keyboard of claim 3, wherein, The portable interactive button includes multiple first-type buttons, each with a recessed finger guide groove in the center, and is used to provide users with customizable shortcut control functions.

5. The keyboard of claim 4, wherein, The finger guide groove is recessed from its own edge toward the center.

6. The keyboard of claim 4, wherein, The portable interactive button also includes a second type of button. Multiple first type buttons are arranged in an array to form a hotkey area. The hotkey area is located close to the smart terminal support. The second type of button is located on the side of the hotkey area away from the smart terminal support. The second type of button is used to cut off the data transmission between the personal smart terminal and the projection display device.

7. The keyboard of claim 6, wherein, The second type of key extends in the direction toward the main input area.

8. The keyboard of claim 3, wherein, The top of the smart terminal support and the keyboard body is also provided with a support receiving groove that is recessed from top to bottom. The end of the smart terminal support near the main input area is rotatably disposed on the inner wall of the receiving groove near the main input area. When the smart terminal support is rotated downward to its limit, the smart terminal support is disposed in the support receiving groove.

9. The keyboard of claim 3, wherein, It also includes a multimedia external port component, which is disposed along the periphery of the keyboard body away from the main input area.

10. The keyboard of claim 3, wherein, It also includes a stop bump, which is located between the smart terminal support and the main input area.

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