Multi-display electric multi-posture workbench system

Abstract

The utility model relates to a multi-displayer electric multi-posture workbench system which comprises a controller, a table top plate, a support fixing base and an electric lifting support. The controller comprises a motor driving circuit and a user operation interface or an entity panel and is used for controlling a motor of the electric lifting support. The support is connected with the table top plate through a fixing base and provided with a rotating angle adjusting mechanism and a lifting adjusting mechanism. The angle rotating mechanism comprises a rotating mechanism, a cross beam connected with the rotating mechanism and a display connecting device fixed on the cross beam, and the display is arranged on the connecting device; the rotating mechanism can drive the displayer to rotate so as to adjust the pitching angle of the displayer relative to the desktop plate. The lifting adjusting mechanism is used for lifting or lowering the height of the displayer. The controller can operate and adjust the pitch angle and height.

Description

Technical Field

[0001] The present technology generally relates to a multi-display electric multi-posture workbench system. Specifically, it relates to a bracket that can provide users with convenient display posture adjustment functions in different working environments to improve ergonomic conditions and increase work efficiency; it also relates to a bracket that adjusts the spatial position of the keyboard and mouse. Background Art

[0002] With the advancement of computer technology and changes in office environments, more and more people are using multiple monitors to improve work efficiency. However, traditional fixed monitor arms often fail to meet the individual needs of different users, especially when they frequently change between sitting and standing positions. Manually adjusting the monitor position is not only time-consuming and laborious, but also difficult to precisely achieve the ideal viewing angle.

[0003] While the electric height-adjustable desks and desk lifts currently available on the market offer a certain degree of adjustment, most only offer single-direction movement, such as up and down. This lack of flexibility in the multi-dimensional adjustment of monitors, coupled with the need for adjustments driven by varying body postures, is unsuitable for comfort, and can be heavy, costly, complex to install, and difficult to maintain.

[0004] Beneficial effects

[0005] This technology has the following characteristics:

[0006] 1. Multi-dimensional Adjustment: The monitor can be rotated to any angle within the horizontal plane, while also achieving smooth electric lift in the vertical and pitch directions, meeting various adjustment requirements for the monitor in three dimensions. The keyboard and mouse tray can also be adjusted in angle and position to match the monitor's posture.

[0007] 2. Strong load-bearing capacity: It has sufficient load-bearing capacity to support multiple monitors and is suitable for use in dual-screen or multi-screen environments.

[0008] 3. Compact design: The design is compact and will not take up too much desktop space, making the desktop environment neat and beautiful.

[0009] 4. Compatibility and aesthetics: Taking into account aesthetics and compatibility with other office furniture, the workbench system is not only practical, but also can be integrated into different office environments. It can be directly installed on any table and supports users' usage needs in different postures.

[0010] 5. Health benefits: It greatly improves the user's working comfort and supports users to switch freely between lying, sitting or standing positions. The multi-monitor setting supports neck rotation, and the keyboard tray setting supports a variety of hand and shoulder postures, reducing problems such as cervical spine, lumbar spine, and perianal area caused by maintaining a single or bad posture for a long time, which is conducive to improving occupational health and work efficiency.

[0011] 6. Cost-effectiveness: Compared with traditional solutions, this workbench system is easy to install, lightweight, and has lower overall and system costs. Summary of the Invention

[0012] A multi-display electric multi-posture workbench system, comprising a controller, a desktop panel, a bracket fixing seat and an electric lifting bracket; the controller comprises a motor drive circuit and a user operation interface or a physical panel; the controller controls the motor on the electric lifting bracket; the electric lifting bracket is fixed to the desktop panel through the bracket fixing seat; the electric lifting bracket has an angle adjustment mechanism, comprising a rotating mechanism, a beam and a display connecting device; a display is mounted on the display connecting device; the display connecting device is mounted on the beam; the beam is connected to the rotating mechanism; the rotation of the rotating mechanism can drive the display to rotate, and can adjust the pitch angle of the display relative to the desktop panel; the controller operates the rotating mechanism to adjust the pitch angle; the electric lifting bracket has a lifting adjustment mechanism, which can raise or lower the height of the display relative to the desktop panel; the controller operates the lifting adjustment mechanism to adjust the lifting height.

[0013] The system includes a keyboard tray, which includes a keyboard tray fixing seat, a free-extending arm and a keyboard tray panel; a keyboard or mouse is placed on the keyboard tray panel; there are two sets of free-extending arms, and the ends of their respective extensions are located on both sides of the keyboard tray panel; there are also two keyboard tray fixing seats, which are connected to the roots of the corresponding free-extending arms; the keyboard tray fixing seat is installed on the front side of the desktop panel; when the keyboard tray panel is dragged and the force on the free-extending arm exceeds a threshold, the free-extending arm follows and changes its extension state; when the keyboard tray panel is not dragged and the force on the free-extending arm does not exceed a threshold, the free-extending arm supports the keyboard tray panel.

[0014] The free extension arm has a two-stage parallelogram linkage mechanism on one side; the end of the free extension arm is connected to the keyboard support panel through a rotating shaft; the end of the free extension arm has a locking hole; both sides of the keyboard support panel also have positioning holes; a pin passes through the locking hole and the positioning hole, so that the keyboard support panel and the desktop panel maintain a stable relative inclination angle.

[0015] The crossbeam is a rotating shaft rod with a transmission clamp and a limit clamp on the rod; the transmission clamp is fixed on the rotating shaft rod, and a transmission slot is provided at its end; the electric lifting bracket has a shell; the rotating mechanism includes an angle gear set and an angle motor; the angle gear set is located in the shell; the angle gear set has a linkage gear, whose protrusion has end face teeth; the rotating shaft rod passes through the center hole of the linkage gear, and the end face teeth are inserted into the transmission slot, so that the rotating shaft rod and the linkage gear can rotate synchronously; the limit clamp is on the other side of the shell, clamping the rotating shaft rod so that the shell is located between the transmission clamp and the limit clamp; there is a display connecting device connecting the rotating shaft rod and the display; the angle motor is operated by the controller to drive the angle gear set, so that the linkage gear drives the rotating shaft rod to rotate, and finally the display connecting device and the display rotate synchronously, thereby adjusting the pitch angle of the display.

[0016] The lifting and adjusting mechanism has a column profile; the back of the column profile has a groove, and a rack is inside the groove; the outer shell has a lifting gear set; the lifting and adjusting mechanism has a lifting motor; the lifting motor is operated by the controller to drive the lifting gear set to rotate; the rack is rotatably engaged with the corresponding gear in the lifting gear set inside the electric lifting bracket, so that the display and related devices can adjust the height relative to the desktop panel.

[0017] The bracket fixing seat has an upward steel shaft; the column profile has a rotating circular groove; the bottom end of the column profile has a sliding chassis to support the entire column profile; the steel shaft is inserted into the column profile through the rotating circular groove; the electric lifting bracket together with the display can be rotated around the steel shaft by manual pushing.

[0018] There are branches on the rotating shaft rod; and there are display connecting devices on the branches.

[0019] A telescopic arm is arranged on the rotating shaft rod; a supporting plate is arranged at the end of the telescopic arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the upper front side view Figure 6 This is an internal perspective view from the upper side Figure 11 Dorsal view

[0021] Figure 2 It is a side view Figure 7 It is a side view Figure 12 Back view

[0022] Figure 3 It is the rear view Figure 8 A partial top view Figure 13It is the upper side view

[0023] Figure 4 It is a top view Figure 9 It is the upper side view

[0024] Figure 5 It is the upper side view Figure 10 It is the upper side view DETAILED DESCRIPTION

[0025] The simplest embodiment of a multi-display electric multi-posture workbench system ,like Figure 1 As shown, it includes: a controller, a desktop panel (7) and an electric lifting bracket (1). The details are as follows:

[0026] * Controller The controller is used to control the motor in the electric lift bracket and includes a user interface (or physical panel) and a motor drive circuit. The user interface can be a wired or wireless physical button set, such as an infrared remote control (including infrared reception), or a virtual image or voice control program. The motor drive circuit in the controller includes, for example, a stepper motor drive circuit or a brushless motor drive circuit (including a travel feedback circuit). The specific button layout, interface design, program design, and circuit design of the controller are common knowledge. The present invention only relates to the combination relationship between the controller and other parts.

[0027] * Desktop Panel This is the main surface of the workbench, used to fix the electric lifting stand, and also used to place computer equipment and other office supplies. The latter embodiment has a keyboard tray fixed to the desktop board.

[0028] * Electric lifting bracket – Provides monitor height and angle adjustment. The motorized lift bracket is fixed to the desktop panel.

[0029] - The electric lifting bracket has a rotation angle adjustment mechanism. The rotation angle adjustment mechanism includes a rotating mechanism, a crossbeam (3), and a display connection device (6); the display is mounted on the display connection device, the display connection device is mounted on the crossbeam, and the crossbeam is connected to the rotating mechanism. The electric lifting bracket has a motor inside, which is controlled by a controller. The rotation of the motor drives the rotating mechanism to rotate, and the motor tilts or rotates the display connection device and the display to adjust the pitch angle to obtain the best viewing angle. In this embodiment, the crossbeam is not limited to Figure 1 The circular tube in the figure can be any rotatable structure with a lateral support function.

[0030] -The electric lifting bracket also has a lifting adjustment mechanism, which is operated by a remote control. The relative displacement between the motor and the column, or the extension and contraction of the column, changes the relative height of the lifting adjustment mechanism (and other accessories) and the desktop panel, and changes the position of the display. There are many transmission structures of the lifting adjustment mechanism, such as rack and pinion, multi-stage screw, etc. For example, many common electric push rods are lifted by screws, and there are also multi-stage telescopic lifting electric push rods (10). The transmission mechanism is usually integrated into the column (2) (17) (31), and the column is usually mounted on the back side of the desktop panel with a tiger card (4). In some embodiments, a hole is directly punched in the desktop panel, and a screw is used to penetrate the desktop panel from the bottom up to lock the base of the column, so that it is convenient for some desktops that cannot use tiger cards, such as when the table edge board is too thick, has a slope or obstacles, etc. Reference number (17) Figure 2 , reference number (31) Figure 3 .

[0031] An embodiment of a workbench system with a rotating shaft ,

[0032] like Figure 2 , viewed from the side, in the angle adjustment mechanism, the crossbeam is a rotating shaft rod (13). The controller controls the rotation of the motor (12), and through the gear transmission mechanism (hidden in the main body shell) such as the worm gear and gear, the rotating shaft rod rotates, and the display connecting device (14) fixed to the end of the rotating shaft rod rotates synchronously. In this way, the pitch angle of the display (16) can be controlled by the controller. The roller seat (11) contains rollers or sliding bearings, which limit the entire sliding part to sliding up and down only along the column profile (17). The up and down movement and pitch movement of the display are completely electric and electronically controlled.

[0033] The display connection device allows the display to be freely adjusted in the vertical, horizontal, and rotational angles relative to the display connection device by human power. The base of the display connection device is connected to a rotating shaft rod, and the end is used to connect to the display. The end has a ball joint structure (15). The display can be manually adjusted in all directions and rotated along the ball joint surface. By combining manual adjustment and electronic control adjustment, the display can be adjusted to any angle or posture facing forward.

[0034] like Figure 4 , looking from the top down, the angle adjustment mechanism includes a rotating shaft rod (42), which drives the display connection device (43) fixed at both ends of the rotating shaft rod to rotate synchronously. The rotating shaft rod has a transmission clamp (32)(40) and a limit clamp (33)(41) fixed to the rotating shaft rod (34)(42). Reference number (32)(33)(34) Figure 3 .

[0035] like Figure 5The transmission clamp has a screw hole (50) and a clamping screw hole (54) for fixing the rotating shaft rod through the wall. The inner wall (52) of the two transmission clamps wraps around the rotating shaft rod. Screws are passed through the screw holes (50) for fixing the rotating shaft rod through the wall to fix the transmission clamps on the rotating shaft rod. At the same time, the screws are also passed through the clamping screw holes (54) to strengthen the clamping force of the two transmission clamps. A plurality of transmission slots (53) are arranged around the inner wall of the end of the transmission clamp for inserting the end face teeth of the corresponding transmission components to transmit torque.

[0036] like Figure 6 The linkage gear (56) has end teeth (55) for transmission, which are inserted into the transmission slot of the transmission clamp, and the two are combined; the middle part passes through the rotating shaft rod; at the same time, a rolling bearing (57) is installed on the protruding part of the gear at one end; the other end also contains a rolling bearing, and is installed on the outer shell convex ring through the bearing. When the linkage gear rotates, it drives the transmission clamp to rotate the rotating shaft rod, thereby enabling the display connection devices at both ends to rotate. The linkage gear is driven by the upper gear (61) and the worm wheel (62). The upper gear and the worm wheel contain bearings, and the string shaft (60) passes through the axial center hole and is supported by the outer shell. The rotating shaft rod at one end is supported on the inner wall of the gear (with bearings inside); the rotating shaft rod at the other end is supported on the rotatable inner ring (58), which is also fixed in the inner shell of this side and clamped with two limit clamps (59) so that the string shaft rod is fixed in the left and right directions and cannot move. The controller controls the motor to drive the worm, drive the worm wheel to rotate, drive the gears to rotate, and drive the rotating shaft rod to rotate.

[0037] The above structure makes it more convenient for users to install. The transmission clamp is pre-installed on the rotating shaft rod. When the user uses it, the rotating shaft rod is inserted into the hollow of the linkage gear (56) and the limiting clamp is installed to clamp the rotating shaft rod. The main body shell is restricted in the middle by the transmission clamp and the limiting clamp, and is kept relatively fixed in the horizontal direction with the rotating shaft rod. In this way, the rotating shaft rod part is installed.

[0038] Embodiment of a workbench system with forked combined shaft and rod rotation ,like Figure 11 The end of the shaft rod is formed of a plurality of short rods to form branches (99), and display connection devices are respectively installed on the branches to connect multiple displays. Because there are branches, multiple layers of displays can be arranged in the upper and lower directions.

[0039] Double-layer power shaft rotating workbench system embodiment ,like Figure 12 Two sets of electric lifting brackets (100) (101) share a common column, and their respective crossbeams / rotating shafts support the display, and can rise and fall together. The upper and lower layers can be adjusted to different rotation angles respectively, which can better meet the user's comfort needs.

[0040] Embodiment of a workbench system supporting pallet rotation ,like Figure 13A support plate (112) is provided on the rotating shaft (111), and a laptop computer (110) is placed or fixed on the support plate. A telescopic arm with a relatively complex structure can be provided between the support plate and the rotating shaft. The laptop computer rotates along with the rotating shaft under the control of a controller. This embodiment can eliminate the need for a fixed display.

[0041] An embodiment of a gear rack lifting ,like Figure 3 , viewed from the back, the lifting and adjusting mechanism has a column profile (31). The column is the part of the lifting and adjusting mechanism that connects to the fixed base and supports the entire lifting bracket and display. It contains structures such as a rack, a screw, and a chain. The rack (30) is fixed to the semi-open inner groove of the column profile by screws at its upper and lower ends, and the entire column profile is inserted into the bracket fixing seat (35). (The bracket fixing seat is a commonly used tiger card, or it can be a support plate larger than the profile cross-section that is fixed with screws after the table top is punched. The bracket fixing seat is fixed to the table top or to the back side of the table top and serves as the base of the entire lifting bracket.) There is a lifting gear set in the housing, one of which is engaged with the rack. A lifting motor (36) is operated by the controller to drive the lifting gear set to rotate, and the rack is engaged with the corresponding gear in the lifting gear set to rotate and move the display and related devices to adjust the height relative to the table top.

[0042] Example of a rotatable workbench system with double column profiles, like Figure 9 The rotating shaft (96) connects multiple display connection devices and corresponding multiple displays (98). The rotating shaft is driven by a gear set and a motor to drive the display to adjust the viewing angle. Two columns (95) (97) support the sliding part of the bracket and the display. Two sets of lifting devices are used in parallel (rotating part or shared) to lift more displays. The double columns provide stronger support and more stable bracket.

[0043] An embodiment of a workbench system with rotatable column profiles, like Figure 10 In this embodiment, the entire column profile can rotate around the upper and lower rotating shafts and can be manually moved. The bracket fixing seat has a steel shaft (91), and the bottom end of the column profile has a sliding chassis (90). The column profile has a rotating circular groove, and the column profile is inserted on the steel shaft and the sliding chassis through the circular groove, so that the column profile and the sliding chassis can rotate along the steel shaft. Then the user can make the electric lifting bracket rotate around the steel shaft of the bracket fixing seat by pushing the upper component. In this way, the display has a larger adjustment angle in the left and right directions, which is suitable for more office layouts, more comfortable, and easier to install. Because the upper part of the crossbeam can be rotated to unload the force when it is pushed and pulled, the bracket is less likely to be damaged by people.

[0044] The following will show an example of a fully functional workbench system

[0045] People's working postures are diverse, and everyone's habitual postures are different.

[0046] For example, when lying down, the line of sight is diagonally upward, so the monitor needs to be placed at a higher height and angled diagonally downward, and the keyboard needs to be placed above the belly of the lying person, otherwise it will be impossible to work comfortably while lying down.

[0047] For example, when standing, a person's line of sight is close to horizontal, the monitor height needs to be adapted to a specific height, the angle is close to horizontal, and the keyboard position height is close to the middle of a person's arm, otherwise it is impossible to stand and work comfortably.

[0048] People's working posture changes frequently and needs to change frequently. If a person's posture is stiff for a long time due to excessive concentration and is continuously subjected to gravity in the same posture, it is easy to cause occupational diseases.

[0049] Example of a full-function workbench system with electric lifting and two-stage retractable keyboard tray ,like Figure 1 A keyboard support is installed on the front side of the desktop (assuming that the user's position relative to the desktop is the front side of the desktop). The keyboard support part includes: a keyboard support panel (8), a free extension arm (9), and a keyboard support fixing seat (5).

[0050] The keyboard support panel is a support panel for the keyboard, and its angle is adjustable.

[0051] The freely extending arm is used to support the keyboard support panel and allow it to move up and down and forward and backward. A typical embodiment is a two-stage parallelogram linkage mechanism.

[0052] The keyboard tray fixing base is the part that connects the extension arm to the desktop panel of the workbench, facing the front user and located on the front side of the desktop panel.

[0053] The entire keyboard tray is designed to be adjustable up and down, front and back, and at an angle to suit the user's comfort. It is used to place the keyboard, mouse, and various computer operating panels.

[0054] A keyboard tray with a two-stage parallelogram linkage mechanism, such as Figure 7 From the side, there is a tiger card-shaped keyboard support fixing seat (70), and a secondary parallel rod telescopic frame (71) that is telescopic via a folding joint (72). The keyboard support plate (73) is fixed to the end (75) of the secondary parallel rod telescopic frame by a support plate rotation axis (76), and the keyboard support plate can rotate along the support plate rotation axis. In addition, there are positioning holes on both sides of the keyboard support plate, and a locking hole (74) at the end of the secondary parallel rod telescopic frame. By inserting a pin into the locking hole and the positioning hole connecting the two, the angle of the keyboard support plate relative to the keyboard support fixing seat and the desktop can be locked. (There are multiple locking holes, each corresponding to a different locking angle, which can be selected by the user.)

[0055] Another example Figure 8Looking from the top down, the joint has two-sided fixing plates (82, 81) that clamp the parallel rods (80). The friction generated by the clamping is adjusted by the tightening force of the screws, so that the keyboard support plate (85) is supported, overcomes the gravity of itself and the keyboard, mouse, etc., and maintains a stable position relative to the keyboard fixing base (83). The joint has an anti-collision block (84) that covers and wraps the screws to prevent the user from contacting sharp parts.

[0056] When using this workbench, if the human body needs to change the working posture: the user uses the controller to adjust the electric lifting bracket, and controls the lifting adjustment mechanism to adjust the monitor to the appropriate height; then controls the rotation angle adjustment mechanism to adjust the monitor's pitch angle to suit the viewing angle requirement; finally, the user grasps the keyboard tray panel with his hands and applies a little force to adjust the keyboard tray panel to the appropriate position and angle. If the table is light, when lifting the keyboard tray, the table needs to be fixed well or the table legs need to be stepped on with the legs. If the keyboard tray needs to place fragile objects such as water cups, or prevent the mouse from falling off the keyboard tray due to the keyboard tray being tilted, or if you want the front of the keyboard tray to have support to rest your hands, then use a pin to insert into the locking hole and positioning hole to make the angle of the keyboard tray stable and the position freely adjustable.

[0057] This technology is a unique solution that allows for flexible switching between lying, standing, and sitting positions, and adjusts the position of the monitor, keyboard, and mouse. Adjustment is easy and convenient, providing high ergonomic comfort and significantly improving the health and work efficiency of white-collar workers. Furthermore, it offers a simple structure, low cost, and easy installation, making it compatible with a variety of desks and furniture.

[0058] The present invention has many variations, many potential implementations and combinations, far exceeding the embodiments mentioned above, and is therefore not limited to what is described in the text.

Claims

1. A multi-display electric multi-posture workbench system, characterized in that : Includes controller, desktop panel, bracket fixing base and electric lifting bracket; The controller includes a motor drive circuit and a user operation interface or physical panel; The controller controls the motor on the electric lifting bracket; The electric lifting bracket is fixed to the desktop panel via the bracket fixing seat; The electric lifting bracket has a rotation angle adjustment mechanism, including a rotating mechanism, a crossbeam and a display connection device; A display is mounted on the display connecting device; The display connection device is installed on the beam; The crossbeam is connected to the rotating mechanism; The rotation of the rotating mechanism can drive the display to rotate, and can adjust the pitch angle of the display relative to the desktop panel; The controller operates the rotating mechanism to adjust the pitch angle; The electric lifting bracket has a lifting adjustment mechanism, which can raise or lower the height of the display relative to the desktop; The controller operates the lifting adjustment mechanism to adjust the lifting height.

2. The system according to claim 1, wherein: The system includes a keyboard tray, which includes a keyboard tray mount, a freely extendable arm, and a keyboard tray panel; A keyboard or mouse is placed on the keyboard support panel; There are two sets of freely extending arms, and the ends of the arms are respectively located on both sides of the keyboard support panel; There are also two keyboard tray fixing seats, connected to the roots of the corresponding freely extending arms; The keyboard tray fixing seat is installed on the front side of the desktop panel; When the keyboard support panel is dragged and the force on the free-extending arm exceeds a threshold, the free-extending arm changes its extension state accordingly; When the keyboard support panel is not dragged and the force applied to the free extension arm does not exceed a threshold value, the free extension arm supports the keyboard support panel.

3. The system according to claim 2, characterized in that: The freely extendable arm has a secondary parallelogram linkage mechanism on one side; The free extension arm, the end of which is connected to the keyboard support panel via a rotating shaft; The free-extending arm has a locking hole at its end; There are also positioning holes on both sides of the keyboard support panel; A latch passes through the locking hole and the positioning hole, so that the keyboard support panel and the desktop panel maintain a stable relative inclination angle.

4. The system according to claim 1, wherein: The crossbeam is a rotating shaft rod with a transmission clamp and a limit clamp on the rod; The transmission clip is fixed on the rotating shaft, and has a transmission slot at its end; The electric lifting bracket has a shell; The rotating mechanism includes an angle gear set and an angle motor; The angle gear set is located in the housing; The angle gear set has a linkage gear, the protruding portion of which has face teeth; The rotating shaft rod passes through the center hole of the linkage gear, and the end face teeth are inserted into the transmission slot, so that the rotating shaft rod and the linkage gear can rotate synchronously; The limiting clamp is on the other side of the housing and clamps the rotating shaft so that the housing is located between the transmission clamp and the limiting clamp; A display connecting device is provided to connect the rotating shaft rod and the display; The angle motor is operated by the controller to drive the angle gear set, so that the linkage gear drives the shaft rod to rotate, and finally the display connecting device and the display rotate synchronously, thereby adjusting the pitch angle of the display.

5. The system according to claim 4, characterized in that: The lifting and adjusting mechanism has a column profile; The back of the column profile has a groove, and the groove has a rack; The housing has a lifting gear set; The lifting and adjusting mechanism includes a lifting motor; The lifting motor is operated by the controller to drive the lifting gear set to rotate; The rack is rotatably engaged with a corresponding gear in a lifting gear set inside the electric lifting bracket, so that the display and related devices can be adjusted in height relative to the desktop panel.

6. The system according to claim 5, characterized in that: The bracket fixing seat has an upward-facing steel shaft; The column profile has a rotating circular groove; The bottom end of the column profile is provided with a sliding chassis to support the entire column profile; The steel shaft is inserted into the column profile through the rotating circular groove; The electric lifting bracket together with the display can be rotated around the steel axis by manual pushing.

7. The system according to claim 6, characterized in that: There are branches on the rotating shaft; There are display connection devices on the branches.

8. The system according to claim 6, characterized in that: There is a telescopic arm on the rotating shaft; There is a supporting plate at the end of the telescopic arm.

9. The system according to claim 6, characterized in that: The system includes a keyboard tray, which includes a keyboard tray mount, a freely extendable arm, and a keyboard tray panel; A keyboard or mouse is placed on the keyboard support panel; There are two sets of freely extending arms, and the ends of the arms are respectively located on both sides of the keyboard support panel; There are also two keyboard tray fixing seats, connected to the roots of the corresponding freely extending arms; The keyboard tray fixing seat is installed on the front side of the desktop panel; When the keyboard support panel is dragged and the force on the free-extending arm exceeds a threshold, the free-extending arm changes its extension state accordingly; When the keyboard support panel is not dragged and the force applied to the free extension arm does not exceed a threshold value, the free extension arm supports the keyboard support panel.

10. The system according to claim 9, characterized in that: The freely extendable arm has a secondary parallelogram linkage mechanism on one side; The free extension arm, the end of which is connected to the keyboard support panel via a rotating shaft; The free-extending arm has a locking hole at its end; There are also positioning holes on both sides of the keyboard support panel; A latch passes through the locking hole and the positioning hole, so that the keyboard support panel and the desktop panel maintain a stable relative inclination angle.

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