Overturning and closing locking device for ceiling screen

Abstract

The invention discloses a ceiling screen overturning and closing locking device which comprises an overturning mechanism and a locking mechanism, and the overturning mechanism comprises a driving gear box assembly and a driven gear box assembly. The driving gearbox assembly comprises a driving shell, a multi-stage transmission part arranged in the driving shell and a driving overturning part in transmission connection with the multi-stage transmission part. The driven gear box assembly comprises a driven shell and a driven turnover part rotationally connected with the driven shell, a corner detection part is arranged in the driven shell, and the corner detection part is in transmission connection with the driven turnover part and used for monitoring the rotation angle of the driven turnover part in real time; the locking mechanism comprises a locking shell, a telescopic transmission part arranged in the locking shell and a spring bolt connected with the telescopic transmission part, and an overturning triggering part is further arranged in the locking shell and electrically connected with the multi-stage transmission part and the telescopic transmission part. Precise control over overturning and locking of the ceiling screen is achieved, user operation is convenient and fast, and the safety and user experience of the vehicle-mounted intelligent cabin are improved.

Description

Technical Field

[0001] This invention relates to the field of ceiling-mounted screen technology, and in particular to a ceiling-mounted screen flipping and closing locking device. Background Technology

[0002] With the continuous development of in-vehicle intelligent cockpit technology, ceiling-mounted screens have become an important information display and human-machine interaction terminal in vehicles. Their structural reliability, ease of operation, and operational safety have a direct impact on the overall user experience. Especially during driving, the rotation stability and locking reliability of the ceiling-mounted screen not only affect the display effect but also directly impact the safety of the driver and passengers.

[0003] Currently, the flipping function of ceiling-mounted screens mostly relies on gear transmission, while the locking method is achieved by controlling the start and stop of the flipping gearbox to maintain the position, or by setting up an independent mechanical locking device. However, the gearbox-based locking method places high demands on the gearbox's output torque and braking performance. If the gearbox torque is insufficient, vibration and rebound are likely to occur when rotation stops, which not only detrimental to locking stability but also generates operating noise. While the independent mechanical locking method can achieve a stable locking effect to a certain extent, it lacks effective action linkage with the flipping gearbox, making it inconvenient to operate.

[0004] Therefore, existing flipping and locking mechanisms for ceiling-mounted screens are difficult to achieve smooth flipping and locking, which is detrimental to safety and user experience. Summary of the Invention

[0005] The purpose of this invention is to provide a ceiling-mounted screen flip-locking mechanism to solve the problem that existing ceiling-mounted screen flip-locking mechanisms and locking mechanisms are difficult to achieve smooth flipping and locking.

[0006] To achieve this objective, the present invention adopts the following technical solution: A ceiling-mounted screen flipping and closing locking device includes a flipping mechanism and a locking mechanism, wherein the flipping mechanism includes: The active gearbox assembly includes a multi-stage transmission unit and an active tilting unit that is connected to the multi-stage transmission unit. The multi-stage transmission unit is used to drive the active tilting unit to rotate within a set angle. The driven gearbox assembly includes a driven tilting part and an angle detection part, wherein the angle detection part is drivenly connected to the driven tilting part and is used to monitor the rotation angle of the driven tilting part in real time; The active flipping part and the passive flipping part are respectively connected to the two ends of the same side of the ceiling screen; When the ceiling screen is in the closed state, the locking mechanism is located on the side of the ceiling screen away from the flipping mechanism. It includes a locking housing, a telescopic transmission part disposed in the locking housing, and a locking tongue connected to the telescopic transmission part. The locking housing is also provided with a flipping trigger part. The flipping trigger part is electrically connected to the multi-stage transmission part and the telescopic transmission part. The telescopic transmission part drives the locking tongue to switch between a first state and a second state. After the switching is completed, the flipping trigger part is triggered.

[0007] Optionally, the multi-stage transmission unit includes a first brushless motor and a first worm gear assembly, a second worm gear assembly, and a gear assembly that are sequentially connected in transmission. The first worm gear assembly includes a first worm and a first worm wheel that mesh with each other. The first worm wheel is coaxially provided with a first transmission gear. The output shaft of the first brushless motor is connected to the first worm. The second worm gear assembly includes a second worm and a second turbine that mesh with each other. The second worm is coaxially provided with a second transmission gear, and the second turbine is coaxially provided with a third transmission gear. The second transmission gear meshes with the first transmission gear. The gear set includes a fourth transmission gear and a fifth transmission gear that mesh with each other. The fourth transmission gear meshes with the third transmission gear, and the active flipping part is connected to the fifth transmission gear.

[0008] Optionally, the active gearbox assembly further includes an active housing, the multi-stage transmission unit is disposed inside the active housing, and the active tilting unit includes: An active rotating shaft is fixedly connected to the fifth transmission gear. The end of the active rotating shaft extends to the outside of the active housing, and a deceleration ring is provided inside the active housing. The deceleration ring is sleeved on the active rotating shaft. The first mounting base is connected to the end of the active rotating shaft and is used for connecting the ceiling screen.

[0009] Optionally, a limiting protrusion is fixed on the outer wall of the active rotating shaft, and a limiting groove is formed on the active housing, with the limiting protrusion located in the limiting groove.

[0010] Optionally, the driven gearbox assembly further includes a driven housing, with the driven tilting part and the angle detection part disposed inside the driven housing. The driven tilting part includes: A driven shaft is rotatably connected to the driven housing, and a deceleration ring is also fitted on the driven shaft; The second mounting base is connected to the end of the driven rotating shaft and is used for connecting the ceiling screen.

[0011] Optionally, the corner detection unit includes: The first detection gear is coaxially connected to the driven shaft and located inside the driven housing; The second detection gear is rotatably disposed inside the driven housing and meshes with the first detection gear; A rotary encoder is provided with a fixed plate inside the driven housing. The rotary encoder is mounted on the fixed plate and connected to the second detection gear.

[0012] Optionally, the driven gearbox assembly further includes a rotation angle balancing section, the rotation angle balancing section comprising: A first balancing gear is disposed on the fixed plate and coaxially connected with the second detection gear. The first balancing gear meshes with a first rack. A first sliding groove is fixed on the fixed plate. A first rack and a first guide rod are disposed in the first sliding groove. The first rack is sleeved on the first guide rod and slides in the first sliding groove. A first spring is sleeved on the first guide rod. The second balancing gear meshes with the first balancing gear. A second sliding groove is fixed on the fixed plate. A second rack and a second guide rod are provided in the second sliding groove. The second rack passes through the second guide rod and meshes with the second balancing gear. A second spring is sleeved on the second guide rod. When the ceiling-mounted screen is in the closed state, the first spring is in the normal state and the second spring is in the compressed state.

[0013] Optionally, the telescopic transmission unit includes a second brushless motor and a third worm gear assembly, an input gear, and an output gear that are connected in sequence. The third worm gear assembly includes a third worm wheel and a third worm that mesh with each other. The output shaft of the second brushless motor is connected to the third worm. The third worm wheel, the input gear, and the output gear are all coaxial double-stage gears and mesh in sequence. The locking tongue has an internal rack that meshes with the output gear.

[0014] Optionally, the latch includes a sliding part and a locking hook part. The sliding part slides in the locking housing, and the internal rack is located on the sliding part. A trigger block is fixed on the sliding part, and the telescopic transmission part drives the latch to move towards or away from the ceiling screen. When the ceiling screen is in a closed state, the latch is in a first state. When the ceiling screen is in a flipped or open state, the latch is in a second state. When the latch moves and is in the first or second state, the trigger block triggers the flip trigger part.

[0015] Optionally, two sets of flip trigger parts are arranged symmetrically and at intervals along the sliding direction of the latch, and the trigger block is located between the two sets of flip trigger parts. Each set of flip trigger parts includes: The mounting block is fixedly connected to the locking housing, and a receiving cavity is provided on the mounting block; A rotating block is rotatably connected to the mounting block and located in the receiving cavity. A torsion spring is provided on the rotating shaft of the rotating block, and the rotating block has a first contact surface and a second contact surface. A pressure trigger is disposed in the receiving cavity and electrically connected to the first brushless motor. When the rotating block rotates into the receiving cavity to the maximum angle, the pressure trigger is triggered. When the rotating block is not rotating, the first contact surface is in an inclined state. When the trigger block moves to the position of the first state or the second state, it first abuts against the first contact surface and pushes the rotating block to rotate by squeezing the first contact surface. When it reaches the position of the first state or the second state, the trigger block abuts against the second contact surface and the rotating block rotates to the maximum angle.

[0016] Compared with the prior art, the present invention has the following beneficial effects: In the ceiling-mounted screen flipping and locking device provided in this embodiment of the invention, after the ceiling-mounted screen is flipped to the closed position, the locking tongue triggers the flipping trigger, allowing the telescopic transmission unit to drive the locking tongue to extend, thereby locking the ceiling-mounted screen. When the user issues an unlocking command, the control system first controls the telescopic transmission unit to extend the locking tongue. After the locking tongue is fully extended, it triggers the flipping trigger, allowing the multi-stage transmission unit to drive the active flipping unit to rotate, so that the ceiling-mounted screen begins to flip. By setting the flipping trigger, the locking state of the locking mechanism for the ceiling-mounted screen is linked with the start and stop of the flipping mechanism, avoiding damage to the mechanism caused by forcibly flipping before unlocking, and improving the system's safety and the rationality of the operating logic. The active gearbox assembly adopts a multi-stage composite transmission method, which can improve the gear transmission ratio and torque carrying capacity, which helps to ensure the smooth flipping of the ceiling-mounted screen, and can also effectively overcome the problems of jamming, shaking and noise during flipping, realizing precise control of the ceiling-mounted screen flipping and locking, making it convenient for users to operate, and improving the safety and user experience of the in-vehicle intelligent cockpit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 these drawings without creative effort.

[0018] The structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0019] Figure 1 This is a schematic diagram of a ceiling-mounted screen flipping and closing locking device.

[0020] Figure 2 This is a schematic diagram of the active gearbox assembly.

[0021] Figure 3 This is an exploded view of the active gearbox assembly.

[0022] Figure 4 This is a schematic diagram of the driven gearbox assembly.

[0023] Figure 5 This is an exploded view of the driven gearbox assembly.

[0024] Figure 6 This is an exploded view of a portion of the driven gearbox assembly in another embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the locking mechanism.

[0026] Figure 8 This is an exploded view of the locking mechanism.

[0027] Figure 9 This is a partial structural diagram of the locking mechanism.

[0028] Figure 10 This is an exploded view of the flip trigger section.

[0029] Illustrations: 100. Tilting mechanism; 1. Driven gearbox assembly; 11. Driven housing; 12. Multi-section transmission unit; 121. First brushless motor; 122. First worm gear assembly; 123. Second worm gear assembly; 124. Gear set; 13. Driven tilting unit; 131. Driven rotating shaft; 132. Reduction ring sleeve; 133. First mounting base; 2. Driven gearbox assembly; 21. Driven housing; 22. Driven tilting unit; 221. Driven rotating shaft; 222. Second mounting base; 23. Angle detection unit; 231. First detection gear; 232. Second detection gear; 233. Rotary encoder; 234. Fixing plate; 24. Angle. Balance section; 241, First balance gear; 242, First rack; 243, First slide groove; 244, First guide rod; 245, First spring; 246, Second balance gear; 3, Locking mechanism; 31, Locking housing; 32, Telescopic transmission section; 321, Second brushless motor; 322, Third worm gear assembly; 323, Input gear; 324, Output gear; 33, Locking tongue; 331, Sliding section; 332, Internal rack; 333, Locking hook section; 34, Flip trigger section; 341, Mounting block; 342, Receiving cavity; 343, Rotating block; 3431, First contact surface; 3432, Second contact surface; 344, Pressure trigger element. Detailed Implementation

[0030] To make the objectives, features, and advantages of this invention more apparent and understandable, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0031] In the description of this invention, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be a component positioned centrally in the connection.

[0032] This invention provides a ceiling-mounted screen flipping and closing locking device, including a flipping mechanism and a locking mechanism. The flipping mechanism includes an active gearbox assembly and a driven gearbox assembly. The active gearbox assembly includes an active housing, a multi-stage transmission unit located inside the active housing, and an active tilting unit that is driven by the multi-stage transmission unit. The multi-stage transmission unit drives the active tilting unit to rotate within a set angle. The driven gearbox assembly includes a driven housing and a driven tilting unit that is rotatably connected to the driven housing. An angle detection unit is provided inside the driven housing and is driven by the driven tilting unit to monitor the rotation angle of the driven tilting unit in real time. The active tilting unit and the driven tilting unit are respectively connected to the two ends of the same side of the ceiling screen. When the ceiling screen is in the closed state, the locking mechanism is located on the side of the ceiling screen away from the tilting mechanism. It includes a locking housing, a telescopic transmission unit located inside the locking housing, and a locking tongue connected to the telescopic transmission unit. A tilting trigger unit is also provided inside the locking housing. The tilting trigger unit is electrically connected to both the multi-stage transmission unit and the telescopic transmission unit. The telescopic transmission unit drives the locking tongue to switch between a first state and a second state. After the switching is completed, the tilting trigger unit is triggered.

[0033] In the ceiling-mounted screen flipping and locking device provided in this embodiment of the invention, after the ceiling-mounted screen is flipped to the closed position, the locking tongue triggers the flipping trigger, allowing the telescopic transmission unit to drive the locking tongue to extend, thereby locking the ceiling-mounted screen. When the user issues an unlocking command, the control system first controls the telescopic transmission unit to extend the locking tongue. After the locking tongue is fully extended, it triggers the flipping trigger, allowing the multi-stage transmission unit to drive the active flipping unit to rotate, so that the ceiling-mounted screen begins to flip. By setting the flipping trigger, the locking state of the locking mechanism for the ceiling-mounted screen is linked with the start and stop of the flipping mechanism, avoiding damage to the mechanism caused by forcibly flipping before unlocking, and improving the system's safety and the rationality of the operating logic. The active gearbox assembly adopts a multi-stage composite transmission method, which can improve the gear transmission ratio and torque carrying capacity, which helps to ensure the smooth flipping of the ceiling-mounted screen, and can also effectively overcome the problems of jamming, shaking and noise during flipping, realizing precise control of the ceiling-mounted screen flipping and locking, making it convenient for users to operate, and improving the safety and user experience of the in-vehicle intelligent cockpit.

[0034] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0035] like Figures 1-10 As shown, this invention provides a ceiling-mounted screen flipping and locking device for use in a smart vehicle cockpit. The device enables the flipping and locking of the ceiling-mounted screen, and aims to provide a ceiling-mounted screen flipping and locking mechanism that can achieve smooth flipping and locking. Through structural improvements, this invention also has the advantages of linking the flipping and locking actions, thereby improving safety and user experience.

[0036] like Figure 1 , Figure 2 , Figure 4 and Figure 7 As shown, in this embodiment, the ceiling-mounted screen flipping and locking device includes a flipping mechanism 100 and a locking mechanism 3. The flipping mechanism 100 includes an active gearbox assembly 1 and a driven gearbox assembly 2. The active gearbox assembly 1 includes an active housing 11, a multi-stage transmission unit disposed inside the active housing 11, and an active flipping part 13 that is pulsatorically connected to the multi-stage transmission unit. The multi-stage transmission unit is used to drive the active flipping part 13 to rotate within a set angle. The driven gearbox assembly 2 includes a driven housing 21 and a driven flipping part 22 that is pulsatorically connected to the driven housing 21. An angle detection unit 23 is disposed inside the driven housing 21 and is pulsatorically connected to the driven flipping part 22 to monitor the rotation angle of the driven flipping part 22 in real time. The active flipping part 13 and the driven flipping part 22 are pulsatorically connected to the driven flipping part 22. Part 22 is connected to both ends of the same side of the ceiling screen respectively; when the ceiling screen is in the closed state, the locking mechanism 3 is located on the side of the ceiling screen away from the flip mechanism 100, which includes a locking housing 31, a telescopic transmission part 32 provided in the locking housing 31 and a locking tongue 33 connected to the telescopic transmission part 32. A flip trigger part 34 is also provided in the locking housing 31. The flip trigger part 34 is electrically connected to the multi-stage transmission part and the telescopic transmission part 32. The telescopic transmission part 32 drives the locking tongue 33 to switch between the first state and the second state. After the switching is completed, the flip trigger part 34 is triggered.

[0037] Specifically, both the flipping mechanism 100 and the locking mechanism 3 can be installed on the ceiling inside the vehicle. When the ceiling screen is in the closed state, the driving gearbox assembly 1 and the driven gearbox assembly 2 are located at opposite ends of one side of the ceiling screen, while the locking mechanism 3 can be located on the side of the ceiling screen away from the flipping mechanism 100 to lock the ceiling screen in the closed state. The opening and closing states of the flipping mechanism 100 and the locking mechanism 3 can be controlled by the vehicle's in-vehicle control system.

[0038] The active gearbox assembly 1 includes an active housing 11 connected to the roof of the vehicle, a multi-stage transmission unit and an active tilting unit 13 disposed inside the active housing 11. The multi-stage transmission unit can adopt a multi-stage worm gear and gear transmission method to provide a high transmission ratio and high output torque. The active tilting unit 13 is connected to the multi-stage transmission unit and can be driven to rotate by the multi-stage transmission unit. One end of the ceiling screen is connected to the active tilting unit 13, thereby providing power for the tilting of the ceiling screen. The driven gearbox assembly 2 includes a driven housing 21 connected to the roof and a driven tilting part 22 that can rotate relative to the driven housing 21. The driven tilting part 22 can be connected to the other end of the ceiling screen connected to the active tilting part 13. The driven tilting part 22 and the active tilting part 13 work together to support the ceiling screen to tilt smoothly. The driven housing 21 is provided with an angle detection part 23, for example, a high-precision potentiometer or encoder can be used. Its detection shaft is connected to the driven tilting part 22 for real-time monitoring of the tilting angle of the ceiling screen and feeding the angle signal back to the control system.

[0039] The locking mechanism 3 is located on the opposite side of the ceiling-mounted screen away from the flipping mechanism 100 (e.g., below the screen or on the opposite side). Preferably, two sets are symmetrically arranged on the two sides to balance the locking force. Each locking mechanism 3 includes a locking housing 31, which contains a telescopic transmission part 32, a locking tongue 33, and a flipping trigger part 34. The telescopic transmission part 32 can be driven by a motor or an electric push rod to push the locking tongue 33 to extend or retract. For example, when the locking tongue 33 retracts, the ceiling-mounted screen is locked, and the locking tongue 33 is in the first state; when the locking tongue 33 extends, the ceiling-mounted screen can be flipped, and the locking tongue 33 is in the second state. The flipping trigger part 34 can be a micro switch, a Hall sensor, etc., and its signal terminal is electrically connected to the multi-stage transmission part of the drive gearbox assembly 1.

[0040] It should be noted that when the locking tongue 33 is fully extended to the locked position or fully retracted to the unlocked position, the locking tongue 33 can trigger the flip trigger 34 to generate an electrical signal. This electrical signal is not used as a signal command to drive the multi-stage transmission unit or the telescopic transmission unit 32, but rather as a signal command to allow or prohibit the drive source of the multi-stage transmission unit or the telescopic transmission unit 32 from starting. This ensures that the ceiling screen is fully locked or unlocked by the locking mechanism 3 before it flips, which helps improve the security of the ceiling screen and the user experience.

[0041] In practical implementation, after the ceiling-mounted screen flips to the closed position, the locking tongue 33 triggers the flip trigger 34, allowing the telescopic transmission unit 32 to drive the locking tongue 33 to extend, thereby locking the ceiling-mounted screen. When the user issues an unlock command, the control system first controls the telescopic transmission unit 32 to extend the locking tongue 33. After the locking tongue 33 is fully extended, it triggers the flip trigger 34, allowing the multi-stage transmission unit to drive the active flip unit 13 to rotate, so that the ceiling-mounted screen begins to flip. By setting the flip trigger 34, the locking state of the locking mechanism 3 for the ceiling-mounted screen is linked to the start and stop of the flip mechanism 100, avoiding damage to the mechanism caused by forced flipping before unlocking, and improving the safety and rationality of the system's operation logic. The active gearbox assembly 1 adopts a multi-stage composite transmission method, which can improve the gear transmission ratio and torque carrying capacity, which helps to ensure the smooth flipping of the ceiling-mounted screen. It can also effectively overcome the problems of jamming, shaking and noise during flipping, realizing precise control of the ceiling-mounted screen flipping and locking, making it convenient for users to operate, and improving the safety and user experience of the in-vehicle intelligent cockpit.

[0042] like Figure 2 and Figure 3As shown, in this embodiment of the invention, the multi-stage transmission unit includes a first brushless motor 121 and a first worm gear assembly 122, a second worm gear assembly 123, and a gear set 124 connected in sequence. The first worm gear assembly 122 includes a first worm and a first worm wheel that mesh with each other. A first transmission gear is coaxially arranged on the first worm wheel, and the output shaft of the first brushless motor 121 is connected to the first worm. The second worm gear assembly 123 includes a second worm and a second worm that mesh with each other. A second transmission gear is coaxially arranged on the second worm, and a third transmission gear is coaxially arranged on the second worm. The second transmission gear meshes with the first transmission gear. The gear set 124 includes a fourth transmission gear and a fifth transmission gear that mesh with each other. The fourth transmission gear meshes with the third transmission gear, and the active flipping part 13 is connected to the fifth transmission gear.

[0043] Specifically, the first brushless motor 121 is fixedly installed inside the active housing 11, and its output shaft is connected to the first worm gear. The first worm wheel and the first transmission gear are coaxially arranged and rotatably connected to the active housing 11. The first worm gear meshes with the first worm wheel, and the first brushless motor 121 starts to perform the first stage of transmission, realizing initial deceleration and generating a large torque gain. The first transmission gear meshes with the second transmission gear to output power to the next stage. The second transmission gear is coaxially fixed with the second worm gear, thereby transmitting power to the second worm gear assembly 123, and driving the third transmission gear, which is coaxially arranged with the second worm, to rotate, thereby further amplifying the torque. The third transmission gear meshes with the fourth transmission gear, and the fourth transmission gear further meshes with the fifth transmission gear, and the fifth transmission gear provides power output to power the rotation of the ceiling-mounted screen. The two-stage worm gear series transmission achieves a high transmission ratio, thereby amplifying the output torque of the small brushless motor to a level sufficient to smoothly drive the heavy-duty ceiling screen, which is beneficial for the smooth rotation and stopping of the ceiling screen; moreover, the two-stage worm gear transmission further smooths out speed fluctuations, effectively reducing the noise of the multi-stage transmission unit during operation, and greatly improving the user experience.

[0044] Furthermore, the active tilting unit 13 includes an active rotating shaft 131 and a first mounting base 133. The active rotating shaft 131 is fixedly connected to the fifth transmission gear, and the end of the active rotating shaft 131 extends to the outside of the active housing 11. A deceleration ring 132 is provided inside the active housing 11 and is sleeved on the active rotating shaft 131. The first mounting base 133 is connected to the end of the active rotating shaft 131 and is used for connecting the ceiling screen. For example, the first mounting base 133 has mounting holes that match the mounting holes on the ceiling screen to securely mount the ceiling screen on the first mounting base 133. The deceleration ring 132 is located inside the active housing 11, and a deceleration pad can be arranged around it to provide a deceleration effect for the rotation of the active rotating shaft 131, which helps to further improve the stability of the ceiling screen during tilting.

[0045] For example, the reduction ring 132 can be made of a high-damping material, such as PEEK, which can absorb vibration and shock. The gears, worm gears, and worms in the multi-stage transmission are preferably manufactured using high-precision powder metallurgy to ensure tooth profile accuracy, meshing smoothness, and overall strength.

[0046] Furthermore, a limiting protrusion is fixed on the outer wall of the active rotating shaft 131, and a limiting groove is formed on the active housing 11, with the limiting protrusion located in the limiting groove. The length of the limiting groove can be specifically set according to the maximum allowable rotation angle of the ceiling-mounted screen. Through the cooperation of the limiting groove and the limiting protrusion, the maximum rotation angle of the ceiling-mounted screen can be limited.

[0047] like Figure 4 , Figure 5 and Figure 6 As shown, in this embodiment of the invention, the driven flipping part 22 includes a driven rotating shaft 221 and a second mounting base 222. The driven rotating shaft 221 is rotatably disposed within the driven housing 21, and a deceleration ring sleeve 132 is also fitted onto the driven rotating shaft 221. The second mounting base 222 is connected to the end of the driven rotating shaft 221 and is used for connecting the ceiling screen. The second mounting base 222 and the first mounting base 133 are symmetrically connected to both ends of the ceiling screen. When the driven rotating shaft 131 rotates, it drives the ceiling screen to rotate, which in turn drives the driven rotating shaft 221 to rotate synchronously. The first mounting base 133 and the second mounting base 222 jointly support the ceiling screen, which helps ensure the stability of the ceiling screen during flipping and locking.

[0048] Furthermore, the corner detection unit 23 includes a first detection gear 231, a second detection gear 232, and a rotary encoder 233. The first detection gear 231 is coaxially connected to the driven shaft 221 and located inside the driven housing 21; the second detection gear 232 is rotatably disposed inside the driven housing 21 and meshes with the first detection gear 231; a fixing plate 234 is fixedly disposed inside the driven housing 21, and the rotary encoder 233 is disposed on the fixing plate 234 and connected to the second detection gear 232.

[0049] Specifically, the first detection gear 231 is coaxial and fixedly connected to the driven shaft 221, and the second detection gear 232 meshes with the first detection gear 231. When the ceiling screen flips, the driven shaft 221 drives the first detection gear 231 to rotate synchronously. A fixed plate 234 is fixedly installed inside the driven housing 21, and a rotary encoder 233 is mounted on the fixed plate 234. The detection shaft of the encoder is connected to the shaft of the second detection gear 232, thereby sensing the rotation angle and direction of the second detection gear 232 in real time. The flipping motion of the ceiling screen is transmitted to the first detection gear 231 through the driven shaft 221. After being meshed and transmitted by the second detection gear 232, it finally drives the detection shaft of the rotary encoder 233 to rotate. The rotary encoder 233 feeds back the rotation angle information to the control system, which can accurately determine the real-time angle of the ceiling screen, facilitating precise control of the flipping position.

[0050] like Figure 4 , Figure 5 and Figure 6 As shown, in an optional embodiment of the present invention, the driven gearbox assembly 2 is further provided with a rotation angle balancing part 24, which includes a first balancing gear 241 and a second balancing gear 246. The first balancing gear 241 is mounted on the fixed plate 234 and coaxially connected to the second detection gear 232. The first balancing gear 241 meshes with the first rack 242. The fixed plate 234 is fixed with a first sliding groove 243. The first rack 242 and the first guide rod 244 are arranged in the first sliding groove 243. The first rack 242 is sleeved on the first guide rod 244 and slides in the first sliding groove 243. The first guide rod 244 is sleeved with a first spring 245. The second balancing gear 246 meshes with the first balancing gear 241. The fixed plate 234 is fixed with a second sliding groove. The second sliding groove is arranged with a second rack and a second guide rod. The second rack passes through the second guide rod and meshes with the second balancing gear 246. The second guide rod is sleeved with a second spring. When the ceiling screen is in the closed state, the first spring 245 is in the normal state and the second spring is in the compressed state.

[0051] Specifically, the first balancing gear 241 is coaxially and fixedly connected to the second detection gear 232. The first balancing gear 241 meshes with the first rack 242. A first sliding groove 243 is fixedly installed on the fixed plate 234. The first rack 242 is constrained in the first sliding groove 243 by the first guide rod 244, so that it can only slide linearly along the length of the sliding groove. A first spring 245 is fitted on the first guide rod 244, and the two ends of the spring abut against the first rack 242 and one end of the sliding groove, respectively, to provide elastic force to the first rack 242. The second balancing gear 246 is rotatably mounted on the fixed plate 234 through a rotating shaft and directly meshes with the first balancing gear 241. Its rotation direction is opposite to that of the first balancing gear 241. The second balancing gear 246 meshes with a second rack. The fixed plate 234 is provided with a second sliding groove and a second guide rod. The second rack is constrained in the second sliding groove by the second guide rod. A second spring is fitted on the second guide rod to provide elastic force to the second rack.

[0052] In practice, when the ceiling-mounted screen is fully closed, the first spring 245 is at its free length, while the second spring is compressed, storing elastic potential energy. When the ceiling-mounted screen begins to flip from the closed state, the driven shaft 221 drives the first detection gear 231, the second detection gear 232, and the coaxial first balance gear 241 to rotate. The rotation of the first balance gear 241 drives the first rack 242 to move along the slide, starting to compress the first spring 245. At the same time, it rotates in the opposite direction to the second balance gear 246, driving the second rack to move. Since the second spring is initially compressed, its tendency to release elastic force is converted into an auxiliary torque to assist the ceiling-mounted screen in flipping through the transmission path of the second rack, the second balance gear 246, the first balance gear 241, and the first rack 242. The rebound force of the first spring 245 is converted into a torque to resist the flipping of the ceiling-mounted screen. By controlling the spring stiffness and preload, the flipping force of the ceiling-mounted screen can be well complemented by the resistance generated by its own weight, making the ceiling-mounted screen run more smoothly throughout the flipping process and providing a certain buffering force when it stops flipping, effectively preventing the ceiling-mounted screen from shaking.

[0053] like Figure 7 , Figure 8 and Figure 9As shown, in this embodiment of the invention, the telescopic transmission unit 32 includes a second brushless motor 321 and a third worm gear assembly 322, an input gear 323, and an output gear 324 connected in sequence. The third worm gear assembly 322 includes a third worm wheel and a third worm that mesh with each other. The output shaft of the second brushless motor 321 is connected to the third worm. The third worm wheel, the input gear 323, and the output gear 324 are all coaxial double-stage gears and mesh in sequence. The locking tongue 33 has an internal rack 332 that meshes with the output gear 324. For example, when the second brushless motor 321 starts, it drives the third worm to rotate, and in turn drives the third worm wheel, the input gear 323, and the output gear 324 to rotate in sequence. The coaxial gear of the output gear 324, through the internal rack 332, drives the locking tongue 33 to move towards or away from the ceiling screen, thereby locking or unlocking the ceiling screen.

[0054] Furthermore, the latch 33 includes a sliding part 331 and a locking hook part 333. The sliding part 331 slides within the locking housing 31, and the internal rack 332 is located on the sliding part 331. A trigger block is fixed on the sliding part 331. The telescopic transmission part 32 drives the latch 33 to move towards or away from the ceiling screen. When the ceiling screen is in the closed state, the latch 33 is in the first state. When the ceiling screen is in the flipped or open state, the latch 33 is in the second state. When the latch 33 moves and is in the first or second state, the trigger block triggers the flipping trigger part 34.

[0055] Specifically, the locking tongue 33 is an integral structure consisting of a sliding part 331 and a locking hook part 333. The sliding part 331 can be constrained by the guide rail inside the locking housing 31, so that it can only slide in a preset straight line direction, that is, towards or away from the ceiling screen. The inner rack 332 is formed on the inner side of the sliding part 331. A trigger block is fixedly provided on the sliding part 331. When the telescopic transmission part 32 is working, it drives the locking tongue 33 and the trigger block to move in a straight line together. When the trigger block moves, it can trigger the flip trigger part 34. When the ceiling screen is closed, the locking tongue 33 retracts to lock the ceiling screen, and the locking tongue 33 is in the first state; when the ceiling screen is flipped or opened, the locking tongue 33 extends, and the locking tongue 33 is in the second state.

[0056] like Figure 9 and Figure 10 As shown, further, two sets of flip trigger parts 34 are arranged symmetrically and at intervals along the sliding direction of the latch 33, with the trigger block located between the two sets of flip trigger parts 34. Each set of flip trigger parts 34 includes: Mounting block 341 is fixedly connected to locking housing 31, and mounting block 341 has a receiving cavity 342. Rotating block 343 is rotatably connected to mounting block 341 and located in receiving cavity 342. A torsion spring is provided on the rotating shaft of rotating block 343. Rotating block 343 has a first contact surface 3431 and a second contact surface 3432. The pressure trigger 344 is located in the receiving cavity 342 and is electrically connected to the first brushless motor 121. When the rotating block 343 rotates into the receiving cavity 342 to the maximum angle, the pressure trigger 344 is triggered. When the rotating block 343 is not rotating, the first contact surface 3431 is in an inclined state. When the trigger block moves to the position of the first state or the second state, it first abuts against the first contact surface 3431 and pushes the rotating block 343 to rotate by squeezing the first contact surface 3431. When it reaches the position of the first state or the second state, the trigger block abuts against the second contact surface 3432 and the rotating block 343 rotates to the maximum angle.

[0057] Specifically, the mounting block 341 is fixedly connected inside the locking housing 31, and the mounting block 341 has a receiving cavity 342 with an opening facing the trigger block. The rotating block 343 is rotatably connected to the mounting block 341 via a rotating shaft and is partially located inside the receiving cavity 342. A torsion spring is mounted on the rotating shaft of the rotating block 343. The pressure trigger 344 is fixedly installed at the bottom of the receiving cavity 342 and is arranged opposite to the rotating block 343. The pressure trigger 344 is preferably a micro switch or a force sensor and is electrically connected to the first brushless motor 121 and the second brushless motor 321. Meanwhile, the rotating block 343 has a first contact surface 3431 and a second contact surface 3432. When the rotating block 343 is in a natural untriggered position under the action of the torsion spring, the first contact surface 3431 is inclined and partially protrudes from the opening of the receiving cavity 342, and the second contact surface 3432 is perpendicular to the first contact surface 3431.

[0058] In terms of distance, when the locking tongue 33 extends from the first state position to the second state position, the trigger block moves together with the locking tongue 33. When it approaches the locking endpoint, the trigger block first contacts and presses the first contact surface 3431 of the rotating block 343 on the side closest to it. Since the first contact surface 3431 is an inclined surface, the trigger block pushes the rotating block 343 to rotate during the pressing process. When the locking tongue 33 fully reaches the locking position, the trigger block contacts the second contact surface 3432 and is limited. At this time, under the restriction of the trigger block, the rotating block 343 has rotated to its maximum angle, and the pressure trigger 344 inside the receiving cavity 342 is activated, sending an "unlocked" signal. Only after the control system receives this signal does it allow the first brushless motor 121 to start working, allowing the ceiling screen to flip. By detecting the locking and unlocking endpoints separately through two sets of independent flip triggers 34, the linkage and precise control of the flipping and locking operation sequence are realized, effectively improving the safety of the ceiling screen flipping and locking.

[0059] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ceiling-mounted screen flipping and closing locking device, characterized in that, It includes a flipping mechanism (100) and a locking mechanism (3), wherein the flipping mechanism (100) includes: The active gearbox assembly (1) includes a multi-stage transmission unit and an active tilting unit (13) that is connected to the multi-stage transmission unit. The multi-stage transmission unit is used to drive the active tilting unit (13) to rotate within a set angle. The driven gearbox assembly (2) includes a driven tilting part (22) and a rotation angle detection part (23). The rotation angle detection part (23) is connected to the driven tilting part (22) in a transmission manner and is used to monitor the rotation angle of the driven tilting part (22) in real time. The active flipping part (13) and the passive flipping part (22) are respectively connected to the two ends on the same side of the ceiling screen; When the ceiling screen is in the closed state, the locking mechanism (3) is located on the side of the ceiling screen away from the flipping mechanism (100). It includes a locking housing (31), a telescopic transmission part (32) disposed in the locking housing (31), and a locking tongue (33) connected to the telescopic transmission part (32). The locking housing (31) is also provided with a flipping trigger part (34). The flipping trigger part (34) is electrically connected to the multi-stage transmission part and the telescopic transmission part (32). The telescopic transmission part (32) drives the locking tongue (33) to switch between the first state and the second state. After the switching is completed, the flipping trigger part (34) is triggered.

2. The ceiling-mounted screen flipping and closing locking device according to claim 1, characterized in that, The multi-stage transmission unit includes a first brushless motor (121) and a first worm gear assembly (122), a second worm gear assembly (123), and a gear assembly (124) that are connected in sequence. The first worm gear assembly (122) includes a first worm and a first worm wheel that mesh with each other. The first worm wheel is coaxially provided with a first transmission gear. The output shaft of the first brushless motor (121) is connected to the first worm. The second worm gear assembly (123) includes a second worm and a second turbine that mesh with each other. The second worm is coaxially provided with a second transmission gear, and the second turbine is coaxially provided with a third transmission gear. The second transmission gear meshes with the first transmission gear. The gear set (124) includes a fourth transmission gear and a fifth transmission gear that mesh with each other. The fourth transmission gear meshes with the third transmission gear, and the active flipping part (13) is connected to the fifth transmission gear.

3. The ceiling-mounted screen flipping and closing locking device according to claim 2, characterized in that, The active gearbox assembly (1) further includes an active housing (11), the multi-stage transmission unit is disposed inside the active housing (11), and the active tilting unit (13) includes: The active shaft (131) is fixedly connected to the fifth transmission gear. The end of the active shaft (131) extends to the outside of the active housing (11), and a deceleration ring (132) is provided inside the active housing (11). The deceleration ring (132) is sleeved on the active shaft (131). The first mounting base (133) is connected to the end of the active rotating shaft (131) and is used for connecting the ceiling screen.

4. The ceiling-mounted screen flipping and closing locking device according to claim 3, characterized in that, A limiting protrusion is fixed on the outer wall of the active rotating shaft (131), and a limiting groove is opened on the active housing (11), with the limiting protrusion located in the limiting groove.

5. The ceiling-mounted screen flipping and closing locking device according to claim 2, characterized in that, The driven gearbox assembly (2) further includes a driven housing (21), and the driven tilting part (22) and the rotation angle detection part (23) are disposed inside the driven housing (21). The driven tilting part (22) includes: A driven shaft (221) is rotatably connected to the driven housing (21), and a deceleration ring sleeve (132) is also fitted on the driven shaft (221); The second mounting base (222) is connected to the end of the driven shaft (221) and is used for connecting the ceiling screen.

6. The ceiling-mounted screen flipping and closing locking device according to claim 5, characterized in that, The corner detection unit (23) includes: The first detection gear (231) is coaxially connected to the driven shaft (221) and located inside the driven housing (21); The second detection gear (232) is rotatably disposed inside the driven housing (21) and meshes with the first detection gear (231); A rotary encoder (233) is provided inside the driven housing (21) with a fixed plate (234). The rotary encoder (233) is mounted on the fixed plate (234) and connected to the second detection gear (232).

7. The ceiling-mounted screen flipping and closing locking device according to claim 6, characterized in that, The driven gearbox assembly (2) is further provided with an angle balancing part (24), the angle balancing part (24) comprising: A first balancing gear (241) is disposed on the fixed plate (234) and coaxially connected with the second detection gear (232). The first balancing gear (241) meshes with a first rack (242). A first sliding groove (243) is fixed on the fixed plate (234). A first rack (242) and a first guide rod (244) are disposed in the first sliding groove (243). The first rack (242) is sleeved on the first guide rod (244) and slides in the first sliding groove (243). A first spring (245) is sleeved on the first guide rod (244). The second balancing gear (246) meshes with the first balancing gear (241). A second sliding groove is fixed on the fixed plate (234). A second rack and a second guide rod are provided in the second sliding groove. The second rack passes through the second guide rod and meshes with the second balancing gear (246). A second spring is sleeved on the second guide rod. When the ceiling-mounted screen is in the closed state, the first spring (245) is in the normal state and the second spring is in the compressed state.

8. The ceiling-mounted screen flipping and closing locking device according to claim 1, characterized in that, The telescopic transmission unit (32) includes a second brushless motor (321) and a third worm gear assembly (322), an input gear (323), and an output gear (324) that are connected in sequence. The third worm gear assembly (322) includes a third worm wheel and a third worm that mesh with each other. The output shaft of the second brushless motor (321) is connected to the third worm. The third worm wheel, the input gear (323), and the output gear (324) are all coaxial double-stage gears and mesh in sequence. The latch (33) has an internal rack (332) that meshes with the output gear (324).

9. The ceiling-mounted screen flipping and closing locking device according to claim 8, characterized in that, The latch (33) includes a sliding part (331) and a locking hook part (333). The sliding part (331) slides in the locking housing (31), and the internal rack (332) is located on the sliding part (331). A trigger block is fixed on the sliding part (331). The telescopic transmission part (32) drives the latch (33) to move towards or away from the ceiling screen. When the ceiling screen is in the closed state, the latch (33) is in the first state. When the ceiling screen is in the flipped or open state, the latch (33) is in the second state. When the latch (33) moves and is in the first state or the second state, the trigger block triggers the flip trigger part (34).

10. The ceiling-mounted screen flipping and closing locking device according to claim 9, characterized in that, Two sets of the flip trigger parts (34) are arranged symmetrically and at intervals along the sliding direction of the latch (33), and the trigger block is located between the two sets of flip trigger parts (34). Each set of flip trigger parts (34) includes: Mounting block (341) is fixedly connected to the locking housing (31), and the mounting block (341) has a receiving cavity (342); A rotating block (343) is rotatably connected to the mounting block (341) and located in the receiving cavity (342). A torsion spring is provided on the rotating shaft of the rotating block (343). The rotating block (343) has a first contact surface (3431) and a second contact surface (3432). A pressure trigger (344) is disposed in the receiving cavity (342) and electrically connected to the first brushless motor (121). When the rotating block (343) rotates into the receiving cavity (342) to the maximum angle, the pressure trigger (344) is triggered. When the rotating block (343) is not rotating, the first contact surface (3431) is in an inclined state. When the trigger block moves to the position of the first state or the second state, it first abuts against the first contact surface (3431) and pushes the rotating block (343) to rotate by squeezing the first contact surface (3431). When it reaches the position of the first state or the second state, the trigger block abuts against the second contact surface (3432) and the rotating block (343) rotates to the maximum angle.

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