Coupling, vehicle-mounted curtain device, and vehicle

Abstract

The application provides a coupling, a vehicle-mounted curtain device and a vehicle. The vehicle-mounted curtain device comprises a shell, a winding drum for winding and / or unwinding a curtain, a cover plate connected to a movable end of the curtain, a first arm rod comprising a first side rod and a second side rod which are hingedly connected, one end of the first side rod being hingedly arranged on the shell, and one end of the second side rod being hingedly connected to the movable end, a second arm rod comprising a third side rod and a fourth side rod which are hingedly connected, at least one arm rod motor for driving the first side rod and / or the third side rod, a winding drum motor for driving the winding drum, a coupling comprising a first half coupling connected to the third motor, a second half coupling connected to the winding drum, and an elastic member located between the two half couplings, the elastic member being used for transmitting torque between the first half coupling and the second half coupling, and when the rotation angle of the second half coupling relative to the first half coupling is a first preset angle, the second half coupling and the first half coupling are in rigid abutment.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a coupling, a vehicle-mounted curtain device, and a vehicle. Background Technology

[0002] In-vehicle entertainment plays a crucial role in the passenger experience, and screen projection technology, combining a screen and a projector, is widely used for image / video playback within vehicles. In this technology, the screen's raising and lowering functions are achieved using left and right arm motors and a roller motor. The roller motor rotates the drum via a rigid coupling, which presents challenges in synchronously controlling the three motors, and issues such as screen wrinkling and poor stability. Utility Model Content

[0003] This application provides a coupling, a vehicle-mounted screen device, and a vehicle, which helps to solve the problems of screen wrinkles and poor stability in existing vehicle-mounted screen devices. The various aspects involved in this application are described below.

[0004] In a first aspect, this application provides a vehicle-mounted screen device, comprising: a housing; a roller, the roller being fixedly connected to one end of a screen, the roller being used to roll up and / or unfold the screen, the other end of the screen being a movable end, the movable end being connected to a cover plate; a first arm, including a first side rod and a second side rod hinged together, one end of the first side rod being hinged to the housing, and one end of the second side rod being hinged to the cover plate; a second arm, including a third side rod and a fourth side rod hinged together, one end of the third side rod being hinged to the housing, and one end of the fourth side rod being hinged to the cover plate. The system includes: a connecting link; at least one boom motor for driving the first side rod and / or the third side rod; a drum motor for driving the drum; and a coupling comprising a first half-coupling connected to the third motor, a second half-coupling connected to the drum, and an elastic element located between the first half-coupling and the second half-coupling; the elastic element is used to transmit torque between the first half-coupling and the second half-coupling, and when the rotation angle of the second half-coupling relative to the first half-coupling is a first preset angle, the second half-coupling is rigidly abutting against the first half-coupling.

[0005] Secondly, this application provides a coupling, including: a first half coupling, a second half coupling, and an elastic element located between the first half coupling and the second half coupling; the elastic element is used to transmit torque between the first half coupling and the second half coupling, and when the rotation angle of the second half coupling relative to the first half coupling is a first preset angle, the second half coupling is rigidly abutting against the first half coupling.

[0006] Thirdly, this application provides a vehicle, including a vehicle body and a vehicle-mounted screen device as described in the first aspect.

[0007] In this embodiment, during the curtain unfolding phase, the second half-coupling transmits torque to the first half-coupling via an elastic element, exhibiting elastic transmission characteristics. The elastic element allows for a certain hysteresis in the torque transmission of the third motor, helping to precisely match the speed at which the third motor releases the curtain with the rhythm of the arm motors (the first and second motors), thus eliminating curtain wrinkles. As the transmitted torque increases, when the rotation angle of the second half-coupling relative to the first half-coupling reaches a first preset angle, the second half-coupling and the first half-coupling become rigidly connected, providing stable tension to ensure the curtain unfolds smoothly. This embodiment helps to eliminate the root cause of wrinkles and improves the stability of curtain operation. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments of this application will be briefly introduced below.

[0009] Figure 1 This is a schematic diagram of the vehicle-mounted screen device provided in the embodiments of this application.

[0010] Figure 2 yes Figure 1 A possible rear view of the vehicle-mounted screen device shown.

[0011] Figure 3 This is a schematic diagram of a possible structure of the coupling provided in the embodiments of this application.

[0012] Figure 4 yes Figure 3 The diagram shows another possible structure of the coupling.

[0013] Figure 5 yes Figure 3 The diagram shows another possible structure of the coupling.

[0014] Figure 6 This is a schematic diagram of the constituent units / partial constituent units of the vehicle provided in the embodiments of this application. Detailed Implementation

[0015] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The same or similar reference numerals are used in the drawings to represent the same or similar modules. It should be understood that the drawings are merely illustrative, and the scope of protection of this application is not limited thereto.

[0016] The automotive industry has seen rapid development in recent years, and the application of various entertainment products on in-vehicle platforms has enormous potential. Cars have gradually become mobile terminal products integrating multiple lifestyle functions. The functions of in-vehicle systems are becoming increasingly diverse, and this is also true for in-vehicle audio-visual systems. In-vehicle screen systems and laser projection equipment are well-suited for in-vehicle platforms, greatly enriching the experience for passengers. For example, screen projection technology combining a screen and a projector is used for image / video playback within vehicles.

[0017] With the development of intelligent technology, electrically controlled lifting screens, as an essential component of laser projection equipment, need to be matched with projection screens of appropriate sizes to display various entertainment types, thereby providing different projection effects. For example, providing the largest size projection screen for full-screen viewing, or providing a projection screen of a matching size for displaying entertainment lyrics.

[0018] In related technologies, a common drive system employs left and right arm motors and a roller motor, with multiple motors working together to achieve the screen's raising, lowering, and hovering functions. The roller motor rotates the roller via a coupling to raise and lower the screen. However, these couplings are often rigid or simple elastic structures, solely responsible for power transmission, resulting in a simplistic structure that is ill-suited for complex operating conditions. For example, during screen raising and lowering, gravity and inertia often cause the screen to sag and wrinkle, affecting image quality, reducing user experience, and posing safety hazards due to vibration. Furthermore, the bumps and vibrations of a vehicle environment further exacerbate the screen's instability. Therefore, complex software algorithms and high-precision motor control are needed to maintain the screen's stability.

[0019] It is evident that during the raising and lowering of the curtain, there are issues of poor stability, such as curtain stacking and wrinkles.

[0020] It should be noted that the above-mentioned scheme of raising and lowering the curtain using left and right arm motors and drum motors has the problem of curtain stacking and poor stability. This is just an example. The embodiments of this application can be applied to any type of scenario where the stability of vehicle-mounted curtains is poor.

[0021] Therefore, it is necessary to design a technical solution for a vehicle-mounted screen device with high screen stability.

[0022] Based on this, this application proposes a vehicle-mounted screen device. The following is in conjunction with... Figure 1 , Figure 2 This application provides a detailed description of the vehicle-mounted screen device according to embodiments of the present application. Figure 1 , Figure 2 As shown, the vehicle-mounted screen device 100 of this application embodiment may include: a housing 110, a screen assembly 120, a first arm 140, a second arm 150, a first motor 161, a second motor 162, a third motor 130, and a coupling 170.

[0023] The housing 110 serves as the mounting base for the vehicle-mounted screen device 100 and can be installed on the vehicle body. In some embodiments, the housing 110 can be concealed and fixedly installed within the vehicle body. The housing 110 can be a cover, used not only to support some components but also to cover other components of the vehicle-mounted screen device of this invention, such as the screen itself. The housing 110 can also be a structural component, used only to support some components of the vehicle-mounted screen device according to the embodiments of this application, such as the first arm 140 and the second arm 150; this embodiment of the application does not limit this.

[0024] The curtain assembly 120 can be fixedly mounted on the housing 110. Typically, the curtain assembly 120 includes a roller 122 and a curtain 124. The roller 122 is also called a spool or tube. The curtain 124 has a fixed end and a movable end. The fixed end of the curtain 124 is fixedly connected to the roller 122. The roller 122 is used to wind up and unwind the curtain 124. During the winding process, the fixed end is at the innermost position and rotates with the roller 122. The movable end of the curtain 124 is the end furthest from the housing 110 when unwinding. That is, one end of the curtain 124 is fixed to the roller 122, and the other end is the movable end, which is connected to a rigid movable cover plate 126.

[0025] The first arm 140 has a first side arm 141 and a second side arm 142 that are hinged together. One end of the first side arm 141 is hinged to the housing 110, and one end of the second side arm 142 is hinged to the movable end of the curtain 124. That is, one end of the second side arm 142 is hinged to the movable cover plate 126. The first side arm 141 and the second side arm 142 can be hinged together by a first hinge 144. It should be understood that the first hinge 144 can be an independent hinge, with the ends of the first side arm 141 and the second side arm 142 respectively connected to both ends of the first hinge 144; the first hinge 144 can also be a hinge structure formed by directly hinged the ends of the first side arm 141 and the second side arm 142. The first hinge 144 can achieve the linkage effect of active and passive movement through gear meshing, or it can achieve the linkage effect through other means such as traction lines, which is not limited here.

[0026] The second arm 150 has a third side arm 151 and a fourth side arm 152 that are hinged together. One end of the third side arm 151 is hinged to the housing 110, and one end of the fourth side arm 152 is hinged to the movable end of the curtain 124. That is, one end of the fourth side arm 152 is hinged to the movable cover plate 126. The third side arm 151 and the fourth side arm 152 can be hinged together by a first hinge 144.

[0027] The first side bar 141 has the same length as the third side bar 151, and the second side bar 142 has the same length as the fourth side bar 152. Therefore, the first arm bar 140 has the same length as the second arm bar 150.

[0028] The movable cover plate 126 is connected to the movable end of the curtain 124. Both ends of the movable cover plate 126 are connected to the first arm 140 and the second arm 150, respectively, meaning the installation direction of the movable cover plate 126 is perpendicular to the unfolding direction of the curtain 124. Alternatively, one end of the second side rod 142 is hinged to the movable end of the curtain 124 (or one end of the movable cover plate 126), and one end of the fourth side rod 152 is hinged to the movable end of the curtain 124 (or the other end of the movable cover plate 126). The movable cover plate 126 is typically a rigid component, forming a linkage mechanism together with the first arm 140, the second arm 150, and the roller 122. Figure 1 As shown, the movable cover plate 126 helps to distribute the force evenly on the movable end of the curtain 124 and keep it flat.

[0029] The vehicle-mounted screen device 100 may include at least one arm motor (such as a first motor 161) for driving a first side arm 141 and / or a third side arm 151. It should be understood that the arm motor can directly drive the first side arm 141 and / or the third side arm 151, or indirectly, as long as it enables the first side arm 141 and / or the third side arm 151 to rotate about its hinge point with the housing. For example, the rotor shaft of the arm motor can be directly connected to the hinge point of the first side arm 141 and / or the third side arm 151, and the rotation of the rotor shaft can drive the hinge point to rotate, thereby enabling the first side arm 141 and / or the third side arm 151 to rotate about the hinge point; the arm motor can also be indirectly connected to the first side arm 141 and / or the third side arm 151 through a transmission structure such as a lead screw or gear, which will not be elaborated here.

[0030] For example, a single arm motor can simultaneously drive both the first side arm 141 and the third side arm 151. The arm motor can be positioned on one side and threadedly connected to the hinge joint of the two side arms via a lead screw. Since the two side arms rotate in opposite directions during lifting, the thread direction of the lead screw can be configured with opposite sections, namely left-hand and right-hand threads. The drive end of the lead screw is fixedly connected to the output shaft of the arm motor. The rotation of the motor drives the lead screw to rotate, which in turn drives the two hinged side arms to rotate via a threaded transmission structure (e.g., gears), thus achieving the lifting and lowering of the curtain.

[0031] For example, Figure 2The vehicle-mounted screen device 100 includes two arm motors, wherein the first motor 161, or first arm motor, is mounted on the housing 110 and is used to drive the first side arm 141 to move the first arm 140. The first motor 161 can drive the first side arm 141 to rotate clockwise or counterclockwise, or brake the first side arm 141.

[0032] The second motor 162, also known as the second boom motor, is mounted on the housing 110 and is used to drive the third side rod 151 to move the second boom 150. The second motor 162 can drive the third side rod 151 to rotate clockwise or counterclockwise, or brake the third side rod 151. The first motor 161 and the second motor 162 are also called boom motors.

[0033] Typically, the two arm motors are located on both sides of the screen 124. The two arm arms are driven by two motors independently, which takes up little space and is suitable for vehicle-mounted designs.

[0034] The embodiments of this application do not limit the types of the first motor 161 and the second motor 162. The first motor 161 and the second motor 162 can be worm motors, helical gear motors, etc. In some embodiments, the first motor 161 and the second motor 162 can both be worm motors, which helps to reduce the space occupied and adapt to the vehicle design environment.

[0035] The first motor 161 and the second motor 162 can be synchronously controlled. The specifications of the first motor 161 and the second motor 162 can be the same or different. In some embodiments, the specifications of the first motor 161 and the second motor 162 are the same, which helps to simplify the design and reduce the difficulty of synchronous control.

[0036] For ease of explanation, in this embodiment, the rotation direction of the roller 122 when the curtain 124 is unfolded is considered to be the forward rotation direction. The direction in which the curtain 124 unfolds is downward, and the direction in which the curtain 124 retracts is upward. In this embodiment, viewed from a direction perpendicular to the back of the curtain assembly 120, the first arm 140 is also referred to as the left arm, and the second arm 150 is also referred to as the right arm. The first motor 161 is also referred to as the left motor, and the second motor 162 is also referred to as the right motor.

[0037] The third motor 130 can be fixedly mounted on the housing 110 and is used to transmit power to the drum 122 via the coupling 170, causing the drum 122 to rotate forward or backward, thereby realizing the raising and lowering of the curtain 124. The third motor 130 can also be called a drum motor. The coupling 170 is located between the third motor 130 and the drum 122.

[0038] Figure 3 This is a schematic diagram of a possible structure of the coupling provided in an embodiment of this application. Figure 3 Too Figure 1The diagram shows the structure of the coupling. Figure 3 As shown, the coupling 170 includes a first half-coupling 171 connected to the third motor 130, a second half-coupling 172 connected to the drum 122, and an elastic element 173 located between the first half-coupling 171 and the second half-coupling 172.

[0039] The elastic element 173 is used to transmit torque between the first half-coupling 171 and the second half-coupling 172. When the rotation angle of the second half-coupling 172 relative to the first half-coupling 171 is a first preset angle, the second half-coupling 172 rigidly abuts against the first half-coupling 171. It should be noted that the elastic element 173 can delay the transmission of torque between the first half-coupling 171 and the second half-coupling 172. Here, the torque between the first half-coupling 171 and the second half-coupling 172 is the torque transmitted from the drum motor to the first half-coupling 171. When the actual torque of the first half-coupling 171 needs to be transmitted to the second half-coupling 172, due to the presence of the elastic element 173, the actual torque of the first half-coupling 171 is first transmitted to the elastic element 173. Due to the deformation and energy storage characteristics of the elastic element itself, the elastic element 173 generates a hysteresis torque between the first half-coupling 171 and the second half-coupling 172. This hysteresis torque is first transmitted to the second half-coupling 172. Once the second half-coupling 172 rigidly contacts the first half-coupling 171, the actual torque of the first half-coupling 171 is transmitted to the second half-coupling 172. The term "hysteresis" refers to the fact that initially (before the second half-coupling 172 rigidly contacts the first half-coupling 171), the torque transmitted by the elastic element 173 between the first half-coupling 171 and the second half-coupling 172 is less than the torque transmitted by the drum motor to the first half-coupling 171; that is, the torque transmitted by the second half-coupling 172 is less than the torque transmitted by the drum motor to the first half-coupling 171.

[0040] The first preset angle can be set according to application requirements. For example, the first preset angle can be 10°, 15.5°, 25°, etc.

[0041] Optionally, the vehicle-mounted screen device 100 may further include a support assembly 180. The support assembly 180 is connected to the vehicle body and the housing 110 respectively, and can provide a stable installation and support structure for the housing 110, ensuring the stable operation of the vehicle-mounted screen device 100 in the vehicle environment. Optionally, the support assembly 180 may include a buffer (shock-absorbing) element.

[0042] In some implementations, when the curtain is opened from a fully closed position, the second half-coupling 172 and the first half-coupling 171 elastically transmit torque through the elastic element 173, and the second half-coupling 172 can rotate relative to the first half-coupling 171. Furthermore, when the rotation angle of the second half-coupling 172 relative to the first half-coupling 171 in the first direction is a first preset angle, the second half-coupling 172 rigidly abuts against the first half-coupling 171 to transmit torque, and the second half-coupling 172 can rotate synchronously with the first half-coupling 171.

[0043] In some implementations, when the curtain is initiated to roll up or unfold from any hovering position (which can be either fully unfolded or fully closed; for example, when the curtain is initiated to roll up from the fully unfolded position), the second half-coupling 172 and the first half-coupling 171 elastically transmit torque through the elastic element 173, and the second half-coupling 172 can rotate relative to the first half-coupling 171. Furthermore, when the rotation angle of the second half-coupling 172 relative to the first half-coupling 171 in the first direction is a first preset angle, the second half-coupling 172 rigidly abuts against the first half-coupling 171 to transmit torque, and the second half-coupling 172 can rotate synchronously with the first half-coupling 171.

[0044] In this embodiment, during the opening phase of the curtain 124, the second half-coupling 172 and the first half-coupling 171 transmit torque through the elastic element 173, and the coupling 170 exhibits elastic transmission characteristics. The elastic element 173 allows for a certain lag in the torque transmission of the third motor 130, which helps to precisely match the speed at which the third motor 130 releases the curtain 124 with the speed of the arm motors (first motor 161 and second motor 162), thus helping to eliminate curtain stacking and wrinkles. For example, when the rotational speed of the third motor 130 is higher than that of the arm motor (both are converted into the speed of the curtain), the curtain unfolding speed is greater than the arm lowering speed. This speed mismatch may cause wrinkles in the curtain. Because the coupling 170 is equipped with an elastic element 173, the torque of the third motor 130 is transmitted to the drum with a lag. The lag torque generated by the elastic element 173 ensures that the curtain unfolding speed equals the arm lowering speed, thus ensuring a precise match between the speed at which the third motor 130 releases the curtain 124 and the speed of the arm motor. As the transmitted torque increases, when the rotation angle of the second half-coupling 172 relative to the first half-coupling 171 reaches a first preset angle, the second half-coupling 172 and the first half-coupling 171 become rigidly connected. Both sides of the coupling 170 rotate synchronously, providing stable tension to ensure the curtain unfolds smoothly. This means the torque transmission characteristics can be flexibly adjusted according to the curtain's operating state. This embodiment helps to eliminate the root cause of wrinkles and improve the stability of curtain operation. It also helps to reduce the requirements for motor synchronization control accuracy, simplify software control logic, and reduce research and development and debugging costs.

[0045] In some embodiments, the lengths of the first side rod 141, the second side rod 142, the third side rod 151, and the fourth side rod 152 are all the same. The four side rods are symmetrically and evenly arranged, and the force on both sides of the curtain 124 is even, which helps to stabilize the curtain and reduces the difficulty of control.

[0046] In some implementations, the vehicle-mounted screen device 100 may also include a control module. The control module controls the operating parameters of the first motor 161 and the second motor 162 to match the rotational speed of the first side arm 141 with the rotational speed of the third side arm 151, and the rotational direction of the first side arm 141 is opposite to that of the third side arm 151. That is, the controller makes the rotational speed of the first side arm 141 consistent with the rotational speed of the third side arm 151, synchronously controlling the movement of the left and right arms, which helps improve the synchronicity of the movement of the left and right arms and enhances the stability of the screen's stepless hovering state. For example, the controller can control the rotational speed of the first side arm 141 to be consistent with the rotational speed of the third side arm 151, synchronously controlling the movement of the left and right arms.

[0047] In some embodiments, when the curtain assembly 120 is in the unfolded state and / or retracted state, i.e. during the lifting and lowering of the curtain 124, the controller is used to control the operating parameters of the first motor 161 and the second motor 162 so that the sum of the torques of the first motor 161 and the second motor 162 matches the torque transmitted by the coupling 170.

[0048] In some implementations, the control module is used to perform the following operations: when the curtain 124 is in the fully unfolded or fully closed position, control the third motor 130 to drive the first half coupling 171 and drive the second half coupling 172 so that the pretension of the curtain 124 reaches the preset tension, at which time the first half coupling 171 and the second half coupling 172 are in rigid contact.

[0049] The specific value of the preset tension can be set according to the application conditions and experience. It should be noted that the tension transmitted by the elastic element 173 in the elastic state is less than the preset tension. When the pretension of the curtain 124 reaches the preset tension, the first half coupling 171 and the second half coupling 172 are in rigid contact.

[0050] For example, after assembly, once the curtain has retracted, the control module can control the third motor 130 to continue operating to further tighten the curtain 124, thereby achieving precise application of pre-tension force, so that the pre-tension force reaches the preset tension, and the curtain is in a taut state.

[0051] During normal use, when the screen enters its fully retracted and taut state, the tension transmitted by the elastic element 173 in its elastic state is less than the preset tension, and the coupling 170 instantly switches from an elastic connection to a rigid connection. In the rigid connection state, the two sides of the coupling 170 rotate synchronously, which can provide a stable preload to the screen, ensuring that the projected image always remains flat and undistorted. This helps to solve the problem of the screen easily loosening when fully retracted, thus improving the user's viewing experience.

[0052] When the screen is fully extended, the tension transmitted by the elastic element 173 in its elastic state is less than the preset tension, and the coupling 170 switches from an elastic connection to a rigid connection. In the rigid connection state, a stable preload can be provided to the screen, ensuring that the projected image remains flat and undistorted, which helps to solve the problem of the screen easily loosening when fully extended.

[0053] Each time the curtain 124 is raised or lowered to the fully closed or fully open position, the control module automatically initiates a pretension reset program to calibrate the pretension parameter value to the preset tension. This automatic pretension calibration mechanism can avoid the problem of pretension attenuation caused by long-term use, help reduce manual maintenance costs, ensure that the curtain maintains good tension every time it is started up in the fully closed or fully open state, and extend the service life of the device.

[0054] This embodiment employs a dynamic pre-tensioning scheme. A third motor 130 continuously applies pre-tensioning force after the screen 124 is fully retracted, and / or automatically resets and calibrates the pre-tensioning force when the screen is fully extended, ensuring the screen remains flat and taut throughout the entire unfolding / retraction process. This embodiment helps address industry pain points such as blurry images and screen wobbling, improving projection clarity and stability while enhancing product durability and meeting users' higher demands for in-vehicle entertainment experiences. It also helps adapt to vibration conditions in the in-vehicle environment and reduces the complexity of software control.

[0055] The coupling and vehicle-mounted projection screen of the present application embodiment will be further described below with reference to some possible implementations of the embodiments of the present application.

[0056] In some implementations, the elastic element 173 is a torsion spring (or simply torsion spring). The main body of the torsion spring is cylindrical, which matches the shaft-like parts, making it easy to arrange and taking up little space.

[0057] In some implementations, coupling 170 is provided with a limiting mechanism to limit the rotation angle of the second half coupling 172 relative to the first half coupling 171.

[0058] Based on the requirements of relative rotation angle and / or the requirements of transmitted torque, the limiting mechanism can switch the coupling 170 from an elastic connection to a rigid connection, and from a state capable of relative rotation to a state capable of synchronous rotation.

[0059] In some implementations, such as Figure 4 As shown, the limiting mechanism may include: a spindle 175 at the output end of the first half-coupling 171, a torsion spring sleeved on the outer circumferential surface of the spindle 175, and a shaft hole at the input end of the second half-coupling 172, with the shaft hole sleeved on the outer circumferential surface of one end of the spindle 175. When the rotation angle of the second half-coupling 172 relative to the first half-coupling 171 is a first preset angle, the inner ring surface of the torsion spring abuts against the outer circumferential surface of the spindle 175, so that the first half-coupling 171 and the second half-coupling 172 are in rigid contact.

[0060] like Figure 4 As shown, the output end of the first half-coupling 171 is provided with a mandrel 175, and the input end of the first half-coupling 171 can be provided as a shaft hole to be sleeved on the output shaft of the third motor 130. Optionally, the connection between the first half-coupling 171 and the output shaft of the third motor 130 can be secured by a set screw. The shaft hole of the second half-coupling 172 can be sleeved on the outer circumferential surface of the mandrel 175, resulting in good coaxiality of the shaft / hole connection.

[0061] Optionally, the second half-coupling 172 can be sleeved within the inner cavity of the drum 122. Optionally, the connection between the second half-coupling 172 and the inner cavity of the drum 122 can be secured by a set screw. In some embodiments, the input shaft of the drum 122 can also be sleeved within the bushing of the second half-coupling 172. In other embodiments, the drum 122 can also be integrally formed with the second half-coupling 172, for example, integrally molded, i.e., the end of the drum 122 is designed to feature the second half-coupling 172, and the first half-coupling 171 and the elastic element 173 are directly connected to the end of the drum 122 to form a coupling 170. It should be understood that since the end of the drum 122 is designed to feature the second half-coupling 172, the drum 122 can be considered as the second half-coupling 172.

[0062] When the curtain is fully retracted or fully extended, the torsion spring contracts under the action of torque, and the inner ring of the torsion spring comes into close contact with the outer circumferential surface of the spindle 175. The coupling 170 instantly switches from an elastic connection to a rigid connection, and the torsion spring and the first half coupling 171 rotate synchronously, and the left and right half couplings rotate synchronously.

[0063] In some implementations, such as Figure 5 As shown, the limiting mechanism may include: a boss 177 at the output end of the first half-coupling 171, and a first stop 178 and a second stop 179 at the input end of the second half-coupling 172. The boss 177, the first stop 178, and the second stop 179 are on the same circumference, and the boss 177, the first stop 178, and the second stop 179 pass through the inner cavity (or inner ring) of the torsion spring. When the second half-coupling 172 rotates relative to the first half-coupling 171 in a first direction by a first preset angle, the boss 177 abuts against the first stop 178. When the second half-coupling 172 rotates relative to the first half-coupling 171 in the opposite direction of the first direction by a second preset angle, the boss 177 abuts against the second stop 179.

[0064] The output end of the first half-coupling 171 and the input end of the second half-coupling 172 are respectively machined with matching bosses and stops (or grooves). The two ends of the torsion spring are respectively embedded in the mounting holes on the retaining rings of the first half-coupling 171 and the second half-coupling 172 to fix the two ends of the torsion spring. When the torsion spring is torsion, if the second half-coupling 172 rotates relative to the first half-coupling 171 in a first direction by a first preset angle, or if the second half-coupling 172 rotates relative to the first half-coupling 171 in the opposite direction of the first direction by a second preset angle, the boss 177 of the first half-coupling 171 and the stop of the second half-coupling 172 abut against each other (engage), which can limit the maximum torsion angle of the torsion spring.

[0065] It should be noted that the relative positions of the boss 177 with the first stop 178 and the second stop 179 need to be determined based on the initial installation state of the torsion spring, the size of the first preset angle, and the second preset angle. And / or, they need to be determined based on the initial installation state of the torsion spring and the torque that the torsion spring needs to transmit in its elastic state.

[0066] Optionally, through precise geometric dimensional control and testing, the limiting error of the boss can be controlled within 0.5°, which helps improve the consistency and stability of the preload and prevents wrinkles in the curtain due to uneven tension. The rigid contact design of the coupling enhances its impact resistance and adapts to the vibration conditions in a vehicle environment. The modular structure facilitates later maintenance; if a single component fails, it can be replaced independently, reducing maintenance costs and difficulty.

[0067] Other types of limiting mechanisms can also be used, and this application embodiment does not specifically limit them. For example, the input end of the second half-coupling 172 can be sleeved on the spindle 175 at the output end of the first half-coupling 171. The input end of the second half-coupling 172 is an outer ring, and a circumferential groove can be provided. A slider can be provided on the outer circumference of the spindle 175. The slider can rotate circumferentially within the groove of the second half-coupling 172. The two ends of the groove can limit the slider, thereby forming a limiting mechanism between the first half-coupling 171 and the second half-coupling 172.

[0068] In this embodiment, during the opening phase of the curtain 124, the second half-coupling 172 and the first half-coupling 171 transmit torque through the elastic element 173, and the coupling 170 exhibits elastic transmission characteristics. The elastic element 173 allows for a certain lag in the torque transmission of the third motor 130, which helps to precisely match the speed at which the third motor 130 releases the curtain 124 with the speed of the arm motors (first motor 161 and second motor 162), thus helping to eliminate curtain stacking and wrinkles. As the transmitted torque increases, when the rotation angle of the second half-coupling 172 relative to the first half-coupling 171 reaches a first preset angle, the second half-coupling 172 and the first half-coupling 171 become rigidly connected, and both sides of the coupling rotate synchronously, providing stable tension to ensure the curtain unfolds smoothly. This means that the torque transmission characteristics can be flexibly adjusted according to the operating state of the curtain. This embodiment helps to eliminate the root cause of wrinkles and improve the stability of curtain operation. It also helps to reduce the requirements for motor synchronization control accuracy, simplify software control logic, and reduce research and development and debugging costs.

[0069] This application also provides a vehicle. Figure 6 This is a schematic diagram of the constituent units / partial constituent units of the vehicle provided in the embodiments of this application. For example... Figure 6As shown, vehicle 600 may include: vehicle body 610 and vehicle screen device 100 as described above.

[0070] Those skilled in the art will understand that Figure 6 This is merely an example of vehicle 600 and does not constitute a limitation on the vehicle. It may include more or fewer parts than shown, or combine certain parts, or use different parts.

[0071] It should be understood that the vehicles in this application embodiment can be wheeled vehicles or work equipment on land. Vehicles can be motor vehicles, including those used for passenger transport, goods transport, and specialized engineering operations. Vehicles can be passenger cars and freight cars. Passenger cars can be private cars, buses, commercial vehicles, or even soft-seat cars, hard-sleeper cars, dining cars, baggage cars, postal cars, etc. Freight cars can be flatcars, open wagons, covered wagons, tank trucks, refrigerated trucks, etc. Vehicles in this application embodiment can be powered by traditional energy sources, such as gasoline, diesel, or natural gas, or by new energy sources, such as electric vehicles or hydrogen fuel cell vehicles. This application embodiment does not specifically limit the type of vehicle.

[0072] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0073] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0074] In the embodiments provided in this application, it should be understood that the disclosed apparatus / device and method can be implemented in other ways. For example, the apparatus / device embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0075] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0076] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0077] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0078] Furthermore, in the description of this application and the appended claims, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A vehicle-mounted screen device, characterized in that, include: case; A roller, which is fixedly connected to one end of the curtain, and the other end of the curtain is a movable end, which is connected to a cover plate. The roller is used to roll up and / or unfold the curtain. The first arm includes a first side arm and a second side arm that are hinged together. One end of the first side arm is also hinged to the housing, and one end of the second side arm is also hinged to the cover plate. The second arm includes a third side arm and a fourth side arm that are hinged together. One end of the third side arm is also hinged to the housing, and one end of the fourth side arm is also hinged to the cover plate. At least one boom motor is used to drive the first side boom and / or the third side boom; A drum motor is used to drive the drum; The coupling includes a first half-coupling connected to the drum motor, a second half-coupling connected to the drum, and an elastic element located between the first half-coupling and the second half-coupling. The elastic element is used to transmit torque between the first half-coupling and the second half-coupling, and when the rotation angle of the second half-coupling relative to the first half-coupling is a first preset angle, the second half-coupling and the first half-coupling are in rigid contact.

2. The vehicle-mounted screen device according to claim 1, characterized in that, When the curtain is started to unfold from the fully closed position, and / or when the curtain is started to roll up or unfold from the suspended position, the second half-coupling and the first half-coupling transmit torque through the elastic element, and when the rotation angle of the second half-coupling relative to the first half-coupling is the first preset angle, the second half-coupling and the first half-coupling are rigidly abutted to transmit torque.

3. The vehicle-mounted screen device according to claim 2, characterized in that, When the curtain is in the fully extended or fully closed position, the first half-coupling and the second half-coupling are in rigid contact, and the pre-tension of the curtain reaches the preset tension.

4. The vehicle-mounted screen device according to any one of claims 1-3, characterized in that, The elastic element is a torsion spring.

5. The vehicle-mounted screen device according to claim 4, characterized in that, The coupling is provided with a limiting mechanism, which is used to limit the rotation angle of the second half coupling relative to the first half coupling.

6. The vehicle-mounted screen device according to claim 5, characterized in that, The limiting mechanism includes: The output end of the first half-coupling is provided with a spindle, and the torsion spring is sleeved on the outer circumferential surface of the spindle. The input end of the second half-coupling is provided with a shaft hole, and the shaft hole is sleeved on the outer circumferential surface of one end of the spindle. When the rotation angle of the second half coupling relative to the first half coupling is the first preset angle, the inner ring surface of the torsion spring abuts against the outer circumferential surface of the mandrel, so that the first half coupling and the second half coupling are rigidly abutted.

7. The vehicle-mounted screen device according to claim 5, characterized in that, The limiting mechanism includes: The output end of the first half-coupling is provided with a boss, and the input end of the second half-coupling is provided with a first stop and a second stop. The boss, the first stop, and the second stop are on the same circumference, and the boss, the first stop, and the second stop pass through the inner cavity of the torsion spring. When the second half-coupling rotates relative to the first half-coupling along the first direction by the first preset angle, the boss abuts against the first stop; and / or, when the second half-coupling rotates relative to the first half-coupling along the opposite direction of the first direction by the second preset angle, the boss abuts against the second stop.

8. A coupling, characterized in that, include: The first half-coupling, the second half-coupling, and the elastic element located between the first half-coupling and the second half-coupling; The elastic element is used to transmit torque between the first half-coupling and the second half-coupling, and when the rotation angle of the second half-coupling relative to the first half-coupling is a first preset angle, the second half-coupling and the first half-coupling are in rigid contact.

9. The coupling according to claim 8, characterized in that, The elastic element is a torsion spring.

10. The coupling according to claim 9, characterized in that, The coupling is provided with a limiting mechanism, which is used to limit the rotation angle of the second half coupling relative to the first half coupling.

11. The coupling according to claim 10, characterized in that, The limiting mechanism includes: The output end of the first half-coupling is provided with a spindle, and the torsion spring is sleeved on the outer circumferential surface of the spindle. The input end of the second half-coupling is provided with a shaft hole, and the shaft hole is sleeved on the outer circumferential surface of one end of the spindle. When the rotation angle of the second half coupling relative to the first half coupling is the first preset angle, the inner ring surface of the torsion spring abuts against the outer circumferential surface of the mandrel, so that the first half coupling and the second half coupling are rigidly abutted.

12. The coupling according to claim 10, characterized in that, The limiting mechanism includes: The output end of the first half-coupling is provided with a boss, and the input end of the second half-coupling is provided with a first stop and a second stop. The boss, the first stop, and the second stop are on the same circumference, and the boss, the first stop, and the second stop pass through the inner cavity of the torsion spring. When the second half-coupling rotates relative to the first half-coupling along the first direction by the first preset angle, the boss abuts against the first stop; and / or, when the second half-coupling rotates relative to the first half-coupling along the opposite direction of the first direction by the second preset angle, the boss abuts against the second stop.

13. A vehicle, characterized in that, include: The vehicle body and the vehicle-mounted screen device as described in any one of claims 1-7.

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