Vehicle-mounted ceiling screen and control method thereof

Abstract

The invention discloses a vehicle-mounted ceiling screen and a control method thereof, and relates to the technical field of vehicle-mounted display, the vehicle-mounted ceiling screen comprises a guide rail, an electromagnetic coil is arranged in the guide rail; the display unit is connected with the guide rail and comprises a rotating shaft, the two ends of the rotating shaft are each provided with a metal sliding block, and the metal sliding blocks can slide in the guide rail; two display screens are symmetrically arranged on the mounting frame; and the angle adjusting unit can drive the rotating shaft to rotate so as to adjust the angle of the two display screens relative to the car roof. The vehicle-mounted ceiling screen solves the technical problems that an existing ceiling screen cannot be horizontally adjusted in the front-back direction, and passengers in the front row and passengers in the rear row cannot see the same picture. After the two display screens are unfolded synchronously, the positions of the display screens on the guide rails are adjusted according to requirements, so that passengers in the front row and the rear row in the vehicle keep the optimal viewing distance from the facing display screens at the same time, and the viewing comfort of the passengers in the front row and the rear row in the vehicle is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted display technology, and in particular to a vehicle-mounted ceiling screen and a control method thereof. Background Art

[0002] The proportion of in-car entertainment screens in cars is getting higher and higher. In response to this demand, most ceiling-mounted screens on the market are single-sided displays. At the same time, the ceiling-mounted screens are in two states, one hidden in a box and the other rotated through a hinge to open the display.

[0003] However, the existing ceiling screen can only adjust the angle when it is lowered, but cannot be adjusted horizontally in the front and rear directions. On the other hand, the existing ceiling screen can only display on one side, but not on both sides, which cannot meet the needs of front and rear passengers to see the same picture. Therefore, a vehicle-mounted ceiling screen and a control method thereof are proposed to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a vehicle-mounted ceiling screen and a control method thereof, which solves the technical problems that the existing ceiling screen can only adjust the angle when lowered but cannot be adjusted horizontally in the front and rear directions, and that the existing ceiling screen can only display on one side and cannot satisfy the requirement that passengers in the front and rear rows can see the same picture.

[0005] To achieve the above object, the present invention provides a vehicle-mounted ceiling screen, comprising:

[0006] A guide track is arranged on the inner side of the roof, and an electromagnetic coil is arranged inside the guide track;

[0007] A display unit is connected to the guide track, and the display unit includes:

[0008] A rotating shaft, wherein a metal slider is disposed at each end of the rotating shaft, and each of the metal sliders is slidably connected to one of the guide rails;

[0009] A mounting frame, sleeved and arranged on the outer peripheral side of the rotating shaft, two display screens are symmetrically arranged on the mounting frame, the two display screens are arranged back to back, and the two display screens can display dual screens at the same time or dual screens at different times;

[0010] An angle adjustment unit is transmission-connected to the rotating shaft, and the angle adjustment unit can drive the rotating shaft to rotate so as to adjust the angles of the two display screens relative to the vehicle roof.

[0011] Preferably, the angle adjustment unit includes: an assembly shell, which is arranged on a side of one of the metal sliders close to the display screen, a first drive motor is arranged in the assembly shell, a first bevel gear is arranged at the output end of the first drive motor, a second bevel gear is arranged at the first end of the rotating shaft, and the second bevel gear is meshed and connected to the first bevel gear.

[0012] Preferably, a limit guide rail is provided on the inner side of the roof, a limit frame is slidably provided on the bottom surface of the limit guide rail, a buckle is provided on the side of the limit frame close to the display screen, and when the display screen is in a retracted state, the limit frame can be driven to abut against the mounting frame, so that the buckle locks the position state of the mounting frame.

[0013] Preferably, an assembly groove is provided on the side of the limit frame away from the display screen, a spiral positioning groove is provided on the inner side wall of the assembly groove, a second drive motor is provided on the inner side of the roof, a drive shaft is provided at the output end of the second drive motor, the drive shaft is coaxially arranged with the assembly groove, and a limit protrusion is provided on the outer peripheral side of the drive shaft, and the limit protrusion is slidably connected to the spiral positioning groove.

[0014] Preferably, a hinge is provided on the top of the mounting frame, an assembly hole is provided at the axis position of the hinge, and the assembly hole is interference fit with the rotating shaft.

[0015] Preferably, a mounting hole is arranged on the side of the metal slider, rolling bearings are sleeved on both ends of the rotating shaft, and the outer side wall of the rolling bearing is connected to the inner side wall of the mounting hole.

[0016] Preferably, a rolling wheel is provided on the bottom surface of the metal sliding block, and the rolling wheel is rollingly connected to the guide rail.

[0017] Preferably, limit blocks are provided at both ends of the guide track.

[0018] Correspondingly, the technical solution of the present invention further provides a control method for a vehicle-mounted ceiling screen, which is applied to any of the above-mentioned vehicle-mounted ceiling screens, and the control method for the vehicle-mounted ceiling screen comprises:

[0019] Controlling the angle adjustment unit to drive the rotating shaft to rotate in a positive direction, so as to increase the acute angle between the two display screens and the roof to a set value;

[0020] Controlling the electromagnetic coil to cut off power, pushing the mounting frame to make the two metal sliders located at both ends of the rotating shaft move synchronously along the corresponding guide rails, so that the passengers in the car can normally watch the display screen they are facing;

[0021] The electromagnetic coil is controlled to be energized, and the electromagnetic coil applies a magnetic attraction force to the corresponding metal slider to lock the position of the metal slider in the guide track.

[0022] Preferably, the step of pushing the mounting frame to make the two metal slide blocks located at both ends of the rotating shaft move synchronously along the corresponding guide rails further includes:

[0023] Pushing the mounting frame causes the two metal sliders located at both ends of the rotating shaft to move synchronously along the corresponding guide rails to the middle position of the guide rails, so that both the front row passengers and the rear row passengers in the vehicle can watch the display screen they are facing;

[0024] Pushing the mounting frame causes the two metal sliders at both ends of the rotating shaft to move synchronously along the corresponding guide rails to the end of the guide rail close to the front row, and at the same time, the angle adjustment unit drives the rotating shaft to rotate a certain angle, and controls the display screen facing the rear passengers to turn on, and the display screen facing the front passengers to turn off;

[0025] Pushing the mounting frame causes the two metal sliders located at both ends of the rotating shaft to move synchronously along the corresponding guide rails to the end of the guide rails close to the rear row. At the same time, the angle adjustment unit drives the rotating shaft to rotate a certain angle, and controls the display screen facing the front passengers to turn on, and the display screen facing the rear passengers to turn off.

[0026] Compared with the above-mentioned background technology, the vehicle-mounted ceiling screen provided by the present invention has the following beneficial effects: the control angle adjustment unit drives the rotating shaft to rotate in the forward direction, so that the mounting frame rotates in the forward direction with the axis of the rotating shaft as the axis center, driving the two display screens to synchronously unfold to the set angle, and at the same time, by pushing the two metal sliders to move synchronously along the corresponding guide rails until the rotating shaft drives the metal sliders to move to the middle position of the guide rails, the passengers in the front and rear rows of the car can normally watch the display screens they are facing, meeting the needs of the front and rear row passengers in the car to see the same picture, and the front and rear row passengers in the car maintain the best viewing distance from the display screens they are facing, effectively improving the viewing comfort of the front and rear row passengers in the car. On the other hand, the display screen facing the front row passengers and the display screen facing the rear row passengers can play different pictures according to needs, further increasing the scope of application of the overall vehicle-mounted ceiling screen, and making it more practical. The control method of the vehicle-mounted ceiling screen adopted in the present invention also has the above beneficial effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] 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 embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0028] Figure 1 A three-dimensional structural diagram of a vehicle-mounted ceiling screen in a folded state provided by an embodiment of the present invention;

[0029] Figure 2 A three-dimensional structural diagram of the vehicle-mounted ceiling screen in an unfolded state provided by an embodiment of the present invention;

[0030] Figure 3 A three-dimensional structural diagram of another structural state of the vehicle-mounted ceiling screen provided by an embodiment of the present invention after being unfolded;

[0031] Figure 4 A schematic diagram of assembling a display unit and an angle driving unit provided in an embodiment of the present invention;

[0032] Figure 5 A cross-sectional schematic diagram of a display screen provided by an embodiment of the present invention;

[0033] Figure 6 A schematic diagram of the assembly between the limiting frame and the mounting frame provided in an embodiment of the present invention;

[0034] Figure 7 A schematic diagram of assembly of another structural state between the limiting frame and the mounting frame provided by an embodiment of the present invention;

[0035] Figure 8 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0036] Fig. 9 A schematic cross-sectional view of a metal slider provided in another embodiment of the present invention.

[0037] Specifically, 1-guide rail; 2-electromagnetic coil; 3-rotating shaft; 4-metal slider; 401-vertical slide groove; 402-pull spring; 403-metal telescopic rod; 404-second limiting tooth; 405-rolling wheel; 5-mounting frame; 6-limiting frame; 601-assembly groove; 602-spiral positioning groove; 603-buckle; 7-assembly shell; 8-first drive motor; 9-first bevel gear; 10-second bevel gear; 11-display screen; 12-second drive motor; 13-drive shaft; 14-limiting protrusion; 15-hinge; 16-assembly hole; 17-circuit board. DETAILED DESCRIPTION

[0038] 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.

[0039] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] like Figure 1 , Figure 2 and Figure 3 As shown, in order to achieve the above-mentioned purpose, the present invention provides a vehicle-mounted ceiling screen, including: a guide track 1, a display unit and an angle adjustment unit.

[0041] The guide rail 1 is horizontally arranged on the inner side of the roof. It should be noted that there are two guide rails 1, which are consistent with the length direction of the vehicle body and are parallel to each other. Further, the guide rail 1 is connected to the display unit, which includes: a rotating shaft 3, and a metal slider 4 is respectively arranged at both ends of the rotating shaft 3, each metal slider 4 is slidably connected to a guide rail 1, and specifically, a guide rail groove is arranged on the side of the guide rail 1, and the guide rail groove extends along the length direction of the wire rail, and the metal slider 4 can slide in the guide groove.

[0042] like Figure 8 As shown, an electromagnetic coil 2 is arranged inside the guide rail 1. The electromagnetic coil 2 will absorb metal materials when powered on. Specifically, the electromagnetic coil 2 generates a magnetic field after being powered on. When an object to be absorbed approaches the electromagnetic coil 2, the metal object will be absorbed by the magnetic force provided by the electromagnetic coil 2. When the object needs to be released, the power supply is simply cut off, the magnetic field disappears, the electromagnetic coil 2 no longer provides magnetic force, and the metal object is no longer absorbed by the magnetic force. Specifically, the electromagnetic coil 2 is arranged along the length direction of the guide rail 1. When the display screen 11 is adjusted to a suitable position, the rotating shaft 3 and the metal sliders 4 at both ends of the rotating shaft 3 move synchronously with the display screen 11 to a certain position on the guide rail 1, and the electromagnetic coil 2 is controlled to be powered on, and the electromagnetic coil 2 provides magnetic attraction to the metal slider 4 to lock the position of the metal slider 4 on the guide rail 1. It should be noted that by pushing the two metal sliders 4 to move synchronously along the corresponding guide rails 1 until the rotating shaft 3 drives the metal slider 4 to move to the middle position of the guide rail 1, that is, by adjusting the position of the display screen 11 below the guide rail 1, the front and rear row passengers in the car can maintain an optimal viewing distance from the display screen 11 they are facing, thereby effectively improving the viewing comfort of the front and rear row passengers in the car.

[0043] A mounting frame 5 is socketed on the outer peripheral side of the rotating shaft 3, and two display screens 11 are symmetrically arranged on the mounting frame 5. The two display screens 11 are arranged back to back, that is, one display screen 11 can face the front passengers and the other display screen 11 can face the rear passengers. It should be further explained that the two display screens 11 can have dual-screen simultaneous display or dual-screen different display. When the two display screens 11 play the same picture synchronously, the demand that the front and rear passengers in the car can see the same picture is met. In addition, the display screen 11 facing the front passengers and the display screen 11 facing the rear passengers can play different pictures according to needs, thereby increasing the scope of application of the overall vehicle-mounted ceiling screen and improving practicality.

[0044] An angle adjustment unit is provided on one side of one of the metal sliders 4. The angle adjustment unit moves synchronously with the metal slider 4. The angle adjustment unit is connected to the rotating shaft 3 through transmission. The rotating shaft 3 can be driven to rotate through the angle adjustment unit to adjust the angle of the two display screens 11 relative to the roof. That is, when the display screen 11 needs to be used, the angle driving unit drives the rotating shaft 3 to rotate in the forward direction, so that the mounting frame 5 rotates in the forward direction with the axis of the rotating shaft 3 as the axis center, and drives the two display screens 11 to expand synchronously to the set angle, so that the passengers in the car can normally watch the display screen 11 they are facing. When the display screen 11 is not needed, the angle driving unit drives the rotating shaft 3 to rotate in the reverse direction, so that the mounting frame 5 rotates in the reverse direction with the axis of the rotating shaft 3 as the axis center, and drives the two display screens 11 to rise synchronously until they fit the roof and are hidden between the two guide rails 1.

[0045] During use, in the initial state, the two display screens 11 are attached to the roof. When the display screens 11 need to be used, the angle driving unit drives the rotating shaft 3 to rotate in the positive direction, so that the mounting frame 5 rotates in the positive direction with the axis of the rotating shaft 3 as the axis center, so as to increase the acute angle between the two display screens 11 and the roof to the set value; the electromagnetic coil 2 is controlled to be powered off, and the mounting frame 5 is pushed to make the two metal sliders 4 located at both ends of the rotating shaft 3 move synchronously along the corresponding guide rail 1 until the rotating shaft 3 drives the metal sliders 4 to move to the middle position of the guide rail 1, and the position adjustment of the display screen 11 under the guide rail 1 is completed, so that the front and rear row passengers in the car maintain an optimal viewing distance from the display screen 11 they are facing, effectively improving the viewing comfort of the front and rear row passengers in the car, and then the electromagnetic coil 2 is controlled to be powered on, and the electromagnetic coil 2 applies a magnetic attraction force to the corresponding metal slider 4 to lock the position of the metal slider 4 on the guide rail 1, ensuring that the display screen 11 remains stable during use.

[0046] like Figure 4 As shown, in one embodiment of the present invention, the angle adjustment unit includes: an assembly shell 7, the assembly shell 7 is slidably arranged on one side of one of the guide rails 1, and a positioning hole is arranged at one end of the assembly shell 7, the positioning hole is sleeved and arranged on the outer peripheral side of the rotating shaft 3, and the positioning hole is rotatably connected to the rotating shaft 3, and a first drive motor 8 is arranged in the assembly shell 7. Preferably, the first drive motor 8 adopts a stepping motor, which can accurately control the rotation angle of the output end. A first bevel gear 9 is arranged at the output end of the first drive motor 8, and a second bevel gear 10 is arranged at the first end of the rotating shaft 3. The second bevel gear 10 is meshed and connected to the first bevel gear 9. By controlling the forward and reverse rotation of the output end of the first drive motor 8, the first bevel gear 9 and the second bevel gear 10 are meshed with each other, and the rotating shaft 3 is stably controlled to rotate a certain angle, thereby controlling the axis of the rotating shaft 3 of the mounting frame 5 to be the forward and reverse rotation of the axis, so as to control the display screen 11 to flexibly switch between the unfolded state and the retracted state.

[0047] Among them, the length direction of the assembly shell 7 is consistent with the length direction of the guide rail 1, and the axis direction of the output end of the first drive motor 8 is consistent with the length direction of the guide rail 1. The output end of the first drive motor 8 is perpendicular to the rotating shaft 3, so that the first drive motor 8 is completely hidden on the inner side of the guide rail 1 and will not take up too much space inside the vehicle. The purpose of driving the rotating shaft 3 to rotate is achieved while ensuring saving space inside the vehicle.

[0048] like Figure 6 and Figure 7 As shown, in one embodiment of the present invention, a limit guide rail is arranged on the inner side of the roof, the length direction of the limit guide rail is consistent with the length direction of the guide track 1, and a limit frame 6 is slidably arranged on the bottom surface of the limit guide rail, and a buckle 603 is arranged on the side of the limit frame 6 close to the display screen 11. When the display screen 11 is in a retracted state, the limit frame 6 can be driven to abut against the mounting frame 5, so that the buckle 603 locks the position state of the mounting frame 5.

[0049] It should be noted that when the display screen 11 is not needed, the metal slider 4 is first pushed to one end of the guide track 1, preferably, the metal slider 4 is pushed to the right end of the guide track 1, and then the first drive motor 8 is controlled to drive the rotating shaft 3 to rotate in the opposite direction, so that the mounting frame 5 rotates in the opposite direction with the axis of the rotating shaft 3 as the axis, driving the two display screens 11 to rise synchronously until they fit the roof, and at this time, the end of the mounting frame 5 away from the rotating shaft 3 is located at the left end of the guide track 1. After the limiting frame 6 is driven until the right end face of the limiting frame 6 abuts against the left side face of the mounting frame 5, the top face of the buckle 603 fits the bottom face of the mounting frame 5, which plays a certain supporting role on the end of the mounting frame 5 away from the rotating shaft 3, thereby improving the stability of the display screen 11 when it is in the retracted state.

[0050] Furthermore, a limiting groove is provided on the side of the mounting frame 5. When the right end face of the limiting frame 6 abuts against the left side face of the mounting frame 5, the buckle 603 can enter the limiting groove. The buckle 603 cooperates with the limiting groove to form a certain limit on the axial direction of the rotating shaft 3 for the mounting frame 5, thereby preventing the mounting frame 5 from moving due to bumps during driving, and further improving the stability of the display screen 11 when it is in the retracted state. In addition, a rounded corner is provided on the right side of the top surface of the buckle 603, and a rounded corner is provided on the left side of the bottom surface of the mounting frame 5. The setting of the rounded corner can make the buckle 603 and the mounting frame 5 cooperate quickly, while avoiding the phenomenon that the buckle 603 and the mounting frame 5 are mutually supported, thereby protecting the display screen 11.

[0051] In order to ensure that the mounting frame 5 and the limiting frame 6 do not interfere with each other during the folding process of the display screen 11, a position sensor can be set on the side of the guide track 1. At the same time, the second drive motor 12 is connected to the circuit board 17, and the circuit board 17 is connected to the control system. The position sensor is used to detect the position of the metal slider 4. When the metal slider 4 is located at the right end limit position of the guide track 1, the position sensor sends a command to the control system, and the control system controls the second drive motor 12 to drive the rotating shaft 3 to rotate through the circuit board 17, so that the display screen 11 can fit the roof. When the metal slider 4 is not located at the right end limit position of the guide track 1, the vertical display screen 11 is taken as the zero point. At this time, the position sensor sends a command to the control system, and the control system controls the second drive motor 12 to drive the rotating shaft 3 to rotate, so that the left and right swing amplitude of the display screen 11 cannot exceed 60°. On the basis of ensuring that the angle of the display screen 11 can be adjusted, the mounting frame 5 is prevented from contacting the limiting frame 6, thereby protecting the overall vehicle-mounted ceiling screen.

[0052] In one embodiment of the present invention, an assembly groove 601 is provided on the side of the limit frame 6 facing away from the display screen 11, a spiral positioning groove 602 is provided on the inner wall of the assembly groove 601, a second drive motor 12 is provided on the inner side of the roof, a drive shaft 13 is provided at the output end of the second drive motor 12, and the drive shaft 13 is provided coaxially with the assembly groove 601, that is, one end of the drive shaft 13 enters into the assembly groove 601 and can rotate freely relative to the assembly groove 601. Furthermore, a limiting protrusion 14 is provided on the outer peripheral side surface of the driving shaft 13, and the limiting protrusion 14 is slidably connected to the spiral positioning groove 602. In the initial state, the limiting protrusion 14 is located at the rightmost end position of the spiral positioning groove 602. At this time, the limiting frame 6 is located at the left extreme position of the limiting guide rail. When the output end of the second driving motor 12 drives the driving shaft 13 to rotate forward by a certain angle, since the limiting protrusion 14 does not change its position in the axial direction of the driving shaft 13, the limiting protrusion 14 cooperates with the spiral positioning groove 602 to push the limiting frame 6 to move to the right until the right side surface of the limiting frame 6 abuts against the mounting frame 5, and the top surface of the buckle 603 fits the bottom surface of the mounting frame 5, which plays a certain supporting role on the end of the mounting frame 5 away from the rotating shaft 3. When it is necessary to release the limit on the mounting frame 5, the output end of the second drive motor 12 is controlled to drive the drive shaft 13 to rotate in the opposite direction by a certain angle. The limit protrusion 14 cooperates with the spiral positioning groove 602 to push the limit frame 6 to move to the left until the top surface of the buckle 603 is separated from the bottom surface of the mounting frame 5.

[0053] like Figure 5 As shown, in one embodiment of the present invention, a hinge 15 is provided on the top of the mounting frame 5, and an assembly hole 16 is provided at the axial position of the hinge 15. The assembly hole 16 is interference fit with the rotating shaft 3. When the rotating shaft 3 rotates, it can drive the mounting frame 5 to rotate synchronously, thereby ensuring the angle adjustment accuracy of the display screen 11.

[0054] Preferably, a plurality of telescopic shafts (not shown in the figure) can be arranged in an array on the top of the mounting frame 5, the upper end of each telescopic shaft is connected to the hinge 15, the telescopic shaft adopts a hydraulic shaft, the lengths of the plurality of telescopic shafts can be adjusted synchronously to control the display screen 11 to further descend, and further adjust according to the height and sitting posture of the passengers to ensure that the passengers in the vehicle can view the display screen 11 at the best viewing angle.

[0055] It should be noted that a mounting hole is provided on the side of the metal slider 4 , and rolling bearings are sleeved on both ends of the rotating shaft 3 , and the outer wall of the rolling bearing is connected to the inner wall of the mounting hole to ensure that the rotating shaft 3 can rotate freely relative to the metal slider 4 .

[0056] In one embodiment of the present invention, a rolling wheel 405 is provided on the bottom surface of the metal slider 4, and the rolling wheel 405 is rollingly connected to the guide rail 1. Specifically, the bottom surface of the rolling wheel 405 contacts the bottom surface of the guide groove, and the metal slider 4 is supported by the rolling wheel 405, so that the friction between the metal slider 4 and the guide groove is improved from sliding friction to rolling friction, thereby reducing the friction between the metal slider 4 and the guide groove, and facilitating the metal slider 4 to move freely in the guide groove.

[0057] In addition, limit blocks (not shown in the figure) are arranged at both ends of the guide rail 1, and the limit blocks can block the metal slider 4 to prevent the metal slider 4 from slipping out of the guide groove.

[0058] In one embodiment of the present invention, a first rack (not shown in the figure) is arranged on the bottom surface of the guide groove, and a first limiting tooth array is arranged on the top surface of the first rack. The first rack extends along the length direction of the guide groove to the two end surfaces of the guide rail 1. The first rack is located in the middle position of the rolling wheels 405 on both sides of the metal slider 4, and the first rack does not contact the rolling wheels 405, ensuring the normal cooperation between the rolling wheels 405 and the guide groove. Fig. 9As shown, further, a vertical slide groove 401 is arranged on the bottom surface of the metal slider 4, a pulling spring 402 and a metal telescopic rod 403 are arranged in the vertical slide groove 401, and a second limiting tooth 404 is arranged on the lower end surface of the metal telescopic rod 403, and the second limiting tooth 404 can mesh with the first limiting tooth. Among them, the upper end of the pulling spring 402 is connected to the metal slider 4, and the lower end of the pulling spring 402 is connected to the metal telescopic rod 403. In the absence of external interference, the metal telescopic rod 403 completely enters the metal slider 4 under the pulling force of the pulling spring 402. When the electromagnetic coil 2 is energized, the electromagnetic coil 2 will initially generate a certain magnetic attraction force on the metal slider 4 to limit the position of the metal slider 4 on the guide rail 1. At the same time, the magnetic attraction force of the electromagnetic coil 2 will overcome the pulling force of the pulling spring 402 to pull the metal telescopic rod 403 out until the second limit tooth 404 can engage with the first limit tooth. At this time, the upper end of the metal telescopic rod 403 is in the vertical slide groove 401, thereby further locking the position of the metal slider 4, ensuring that the display screen 11 will not shake, and improving the stability of the display screen 11 after being locked.

[0059] The control method of the vehicle-mounted ceiling screen adopted by the present invention specifically includes the following steps: in the initial state, the two display screens 11 are attached to the roof. When the display screen 11 needs to be used, the output end of the first drive motor 8 is controlled to rotate forward, and the first bevel gear 9 and the second bevel gear 10 are meshed with each other, driving the rotating shaft 3 to rotate forward by a certain angle, so that the mounting frame 5 rotates forward with the axis of the rotating shaft 3 as the axis center, so as to increase the acute angle between the two display screens 11 and the roof to a set value; the electromagnetic coil 2 is controlled to be powered off, and the mounting frame 5 is pushed so that the two metal sliders 4 located at both ends of the rotating shaft 3 are moved along the corresponding guide The track 1 moves synchronously until the rotating shaft 3 drives the metal slider 4 to move to the middle position of the guide track 1, completing the position adjustment of the display screen 11 below the guide track 1, so that the front and rear passengers in the car maintain an optimal viewing distance from the display screen 11 they are facing, and then the electromagnetic coil 2 is energized, and the electromagnetic coil 2 applies a magnetic force to the corresponding metal slider 4. At the same time, the magnetic force of the electromagnetic coil 2 overcomes the pulling force of the pulling spring 402 to pull out the metal telescopic rod 403 until the second limit tooth 404 engages with the first limit tooth, and at the same time, the position of the metal slider 4 on the guide track 1 is locked.

[0060] It should be noted that the step of pushing the mounting frame 5 to make the two metal sliders 4 at both ends of the rotating shaft 3 move synchronously along the corresponding guide rails 1 also includes: pushing the mounting frame 5 to make the two metal sliders 4 at both ends of the rotating shaft 3 move synchronously along the corresponding guide rails 1 to the middle position of the guide rails 1, so that the front row passengers and the rear row passengers in the car can both watch the display screen 11 they are facing. At this time, the acute angle between the display screen 11 and the roof can be further adjusted according to the height and sitting posture of the front and rear row passengers, so that the front and rear row passengers in the car can both watch the display screen 11 at the best viewing angle.

[0061] When there are no passengers in the front row, the mounting frame 5 is pushed to make the two metal sliders 4 at both ends of the rotating shaft 3 move synchronously along the corresponding guide rails 1 to the end of the guide rails 1 close to the front row, so as to increase the distance between the display screen 11 and the passengers while ensuring that the rear passengers can clearly see the screen 11, thereby protecting eyesight and reducing fatigue. At the same time, the output end of the second drive motor 12 is controlled to drive the rotating shaft 3 to rotate a certain angle, and the acute angle between the display screen 11 and the roof is further adjusted according to the height and sitting posture of the rear passengers, so that the rear passengers in the car can all watch the display screen 11 at the best viewing angle, and the display screen 11 facing the rear passengers is controlled to turn on, and the display screen 11 facing the front passengers is turned off.

[0062] When there are no passengers in the back row, the mounting frame 5 is pushed to make the two metal sliders 4 at both ends of the rotating shaft 3 move synchronously along the corresponding guide rails 1 to the end of the guide rails 1 close to the back row, and the distance between the display screen 11 and the passengers is increased while ensuring that the front row passengers can clearly see the screen 11, which plays a role in protecting eyesight and reducing fatigue. At the same time, the output end of the second drive motor 12 is controlled to drive the rotating shaft 3 to rotate a certain angle, and the acute angle between the display screen 11 and the roof is further adjusted according to the height and sitting posture of the front row passengers, so that the front row passengers in the car can all watch the display screen 11 at the best viewing angle, and the display screen 11 facing the front row passengers is controlled to turn on, and the display screen 11 facing the back row passengers is turned off.

[0063] In summary, after the two display screens 11 are synchronously unfolded to the set angle, the positions of the display screens 11 on the guide track 1 are adjusted as needed, so that the front and rear passengers in the vehicle can maintain an optimal viewing distance from the display screens 11 they are facing at the same time, thereby effectively improving the viewing comfort of the front and rear passengers in the vehicle; and the display screens 11 facing the front passengers and the display screens 11 facing the rear passengers can play different pictures as needed, thereby further increasing the scope of application of the overall vehicle-mounted ceiling screen.

[0064] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0065] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the method and core ideas of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A vehicle-mounted ceiling screen, characterized in that: include: A guide track (1) is arranged on the inner side of the vehicle roof, and an electromagnetic coil (2) is arranged inside the guide track (1); A display unit is connected to the guide rail (1), and the display unit comprises: A rotating shaft (3), wherein a metal slider (4) is respectively arranged at both ends of the rotating shaft (3), and each of the metal sliders (4) is slidably connected to one of the guide rails (1); A mounting frame (5) is sleeved and arranged on the outer peripheral side of the rotating shaft (3), and two display screens (11) are symmetrically arranged on the mounting frame (5), the two display screens (11) are arranged in a back-to-back manner, and the two display screens (11) can display two screens at the same time or display two screens at different times; An angle adjustment unit is transmission-connected to the rotating shaft (3), and the angle adjustment unit can drive the rotating shaft (3) to rotate so as to adjust the angle of the two display screens (11) relative to the vehicle roof.

2. The vehicle-mounted ceiling screen according to claim 1, characterized in that: The angle adjustment unit comprises: an assembly housing (7) slidably arranged on one side of one of the guide rails (1); a first drive motor (8) is arranged in the assembly housing (7); a first bevel gear (9) is arranged at the output end of the first drive motor (8); a second bevel gear (10) is arranged at the first end of the rotating shaft (3); and the second bevel gear (10) is meshingly connected to the first bevel gear (9).

3. The vehicle-mounted ceiling screen according to claim 2, characterized in that: A limiting guide rail is provided on the inner side of the vehicle roof, a limiting frame (6) is slidably provided on the bottom surface of the limiting guide rail, a buckle (603) is provided on the side of the limiting frame (6) close to the display screen (11), and when the display screen (11) is in a retracted state, the limiting frame (6) can be driven to abut against the mounting frame (5), so that the buckle (603) locks the mounting frame (5) in a position state.

4. The vehicle-mounted ceiling screen according to claim 3, characterized in that: A mounting groove (601) is arranged on a side of the limiting frame (6) facing away from the display screen (11); a spiral positioning groove (602) is arranged on an inner side wall of the mounting groove (601); a second driving motor (12) is arranged on the inner side of the roof; a driving shaft (13) is arranged at an output end of the second driving motor (12); the driving shaft (13) is arranged coaxially with the mounting groove (601); and a limiting protrusion (14) is arranged on an outer peripheral side surface of the driving shaft (13); the limiting protrusion (14) is slidably connected to the spiral positioning groove (602).

5. The vehicle-mounted ceiling screen according to claim 1, characterized in that: A hinged part (15) is provided at the top of the mounting frame (5), and an assembly hole (16) is provided at the axis position of the hinged part (15), and the assembly hole (16) is interference-fitted with the rotating shaft (3).

6. The vehicle-mounted ceiling screen according to claim 5, characterized in that: A mounting hole is arranged on the side of the metal sliding block (4), rolling bearings are sleeved on both ends of the rotating shaft (3), and the outer side wall of the rolling bearing is connected to the inner side wall of the mounting hole.

7. The vehicle-mounted ceiling screen according to claim 6, characterized in that: A rolling wheel is provided on the bottom surface of the metal sliding block (4), and the rolling wheel is rollingly connected to the guide rail (1).

8. The vehicle-mounted ceiling screen according to claim 1, characterized in that: Limiting blocks are arranged at both ends of the guide track (1).

9. A control method for a vehicle-mounted ceiling screen, applied to the vehicle-mounted ceiling screen according to any one of claims 1 to 8, characterized in that: The control method of the vehicle-mounted ceiling screen includes: Controlling the angle adjustment unit to drive the rotating shaft (3) to rotate in a positive direction, so as to increase the acute angle between the two display screens (11) and the vehicle roof to a set value; Controlling the electromagnetic coil (2) to cut off power, pushing the mounting frame (5) to cause two metal sliders (4) located at both ends of the rotating shaft (3) to move synchronously along corresponding guide rails (1), so that passengers in the vehicle can normally view the display screen (11) they are facing; The electromagnetic coil (2) is controlled to be energized, so that the electromagnetic coil (2) applies a magnetic attraction force to the corresponding metal slider (4), thereby locking the position of the metal slider (4) in the guide track (1).

10. A method for controlling a vehicle-mounted ceiling screen according to claim 9, characterized in that: The step of pushing the mounting frame (5) to cause the two metal slide blocks (4) located at both ends of the rotating shaft (3) to move synchronously along the corresponding guide rails (1) also includes: Pushing the mounting frame (5) causes the two metal sliders (4) located at both ends of the rotating shaft (3) to move synchronously along the corresponding guide rails (1) to the middle position of the guide rails (1), so that both the front row passengers and the rear row passengers in the vehicle can view the display screen (11) they are facing; The mounting frame (5) is pushed so that the two metal slide blocks (4) located at both ends of the rotating shaft (3) move synchronously along the corresponding guide rail (1) to the end of the guide rail (1) close to the front row, and at the same time, the angle adjustment unit drives the rotating shaft (3) to rotate a certain angle, and controls the display screen (11) facing the rear row passengers to turn on, and the display screen (11) facing the front row passengers to turn off; The mounting frame (5) is pushed so that the two metal sliders (4) located at both ends of the rotating shaft (3) move synchronously along the corresponding guide rail (1) to the end of the guide rail (1) close to the rear row, and at the same time, the angle adjustment unit drives the rotating shaft (3) to rotate a certain angle, and controls the display screen (11) facing the front row passengers to turn on, and the display screen (11) facing the rear row passengers to turn off.

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