Vehicle-mounted projection curtain rope driving structure
By using a rope-driven structure for the vehicle-mounted projection screen, the problems of shaking and light leakage during vehicle operation have been solved, achieving stable deployment and storage, thus improving the viewing quality and cabin space utilization.
Patent Information
- Application Number
- CN202611354603.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-02
- Publication Date
- 2026-11-06
AI Technical Summary
Existing in-vehicle projection screens cannot simultaneously meet the dual requirements of viewing quality and cabin space flexibility while the vehicle is in motion, often resulting in problems such as shaking, light leakage, noise, and transmission looseness.
The vehicle-mounted projection screen adopts a cable-driven structure, including a mounting control unit, a roller gearbox assembly, a roller assembly, a guide rail, a guide assembly, and a swing mechanism. By controlling the start and stop of the roller gearbox assembly, the roller assembly is driven to rotate. In conjunction with the guide assembly and the pull rod, the screen can be stably unfolded and retracted, suppressing shaking and light leakage.
It achieves the effect of not taking up much interior space when folded up, and being stable and light-proof when unfolded, improving the viewing experience and reducing noise and abnormal sounds, thus increasing the flexibility of the cabin space.
Smart Images
Figure CN123047181A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vehicle projection technology, and in particular to a cable-driven structure for a vehicle-mounted projection screen. Background Technology
[0002] With the intelligent upgrade of car cabins, high-end MPVs and RVs are generally equipped with rear-seat in-vehicle projection systems. The projection screen is installed in the ceiling partition and, when unfolded, is located between the front and rear seats for rear-seat audio-visual entertainment. In-vehicle projection screens need to operate stably in the vehicle's driving environment, ensuring a flat, stable, and light-leak-free image when unfolded, while minimizing cabin space occupation when folded and not interfering with the normal adjustment functions of the front seats. Currently, there are various in-vehicle projection screen products on the market, but different products vary significantly in terms of space occupation, operating noise, image stability, and height adjustment synchronization, making it difficult to simultaneously meet users' dual needs for viewing quality and cabin space flexibility. In practical use, in-vehicle projection screens are often affected by the vehicle's driving environment and installation method, making it difficult to simultaneously balance cabin space and viewing effect. The adjustment space of the front seats may be occupied for a long time, and the screen is prone to shaking, wrinkling and light leakage when bumpy. The raising and lowering process is also often accompanied by noise and left and right asynchrony. After long-term use, problems such as transmission loosening and screen sagging may also occur. Therefore, how to design an in-vehicle projection screen that does not take up much interior space when folded up, and is stable and does not leak light when unfolded has become a problem that needs to be solved by those skilled in the art. Summary of the Invention
[0003] The purpose of this invention is to address the aforementioned shortcomings by providing a rope-driven structure for a vehicle-mounted projection screen that does not occupy much interior space when folded up, and is stable and light-free when unfolded.
[0004] To solve the above technical problems, the present invention adopts the following technical solution: a vehicle-mounted projection screen cable-driven structure, comprising: The control unit is installed in the roof of the vehicle. A reel gearbox assembly is mounted on the mounting control unit, which is capable of controlling the start and stop of the reel gearbox assembly. A reel assembly is disposed at the moving end of the reel gearbox assembly, which, when started, can drive the reel assembly to rotate. The curtain body is wound around the roller assembly; Two guide rails are respectively set on the left and right sides of the curtain body; The first guide assembly, which consists of two components and is respectively located on both sides of the bottom of the installation control unit, is used to guide the power output from the roller assembly to the pull rod, so as to drive the curtain body to rise and fall. A swing mechanism is installed inside the vehicle. The guide rail is connected to the moving end of the swing mechanism. The swing mechanism is used to drive the guide rail to swing and adjust, so that the guide rail can switch between a vertical working position and an outward swinging and retracting position. A pull rod is located at the end of the curtain body away from the roller assembly; The second guide assembly consists of two components, which are respectively located on both sides of the pull rod. Each second guide assembly is rotatably and telescopically connected to the corresponding guide rail. When the curtain body is unfolded, it can work with the roller assembly and the first guide assembly to make the curtain body smoothly rise and fall along the direction of the guide rail.
[0005] Furthermore, the installation control unit includes a curtain mounting body disposed on the roof of the vehicle, a controller housing disposed on the curtain mounting body, and a control PCBA disposed inside the controller housing. The control PCBA is used to drive the roller gearbox assembly to start and stop.
[0006] Furthermore, the reel gearbox assembly includes a reduction motor and a gearbox body disposed at the rotation shaft of the reduction motor; The roller assembly includes a roller, the curtain body is wound on the roller, and the two ends of the roller are respectively provided with connectors. One of the connectors is connected to the output end of the gearbox body. Both connectors are coaxially provided with winding wheels, and steel wire ropes are wound around both winding wheels. After passing through the first guide assembly, the two wire ropes are respectively connected to tension springs disposed in the tie rod, and the tension springs are used to apply constant tension to the wire ropes.
[0007] Furthermore, the first guide assembly includes a first pulley bracket, a first pulley, a first open retaining ring, and a first pin. The first pin passes through the center hole of the first pulley, and the first pulley is rotatably mounted on the first pulley bracket via the first pin. The first open retaining ring is engaged at the end of the first pin to restrict the axial movement of the first pin. The first pulley bracket is connected to the guide rail.
[0008] Furthermore, the pull rod is hollow inside, and adhesive felt is pasted on the inner wall of the pull rod. A tension spring is arranged laterally inside the pull rod, and the two ends of the tension spring are hooked and engaged with the two steel wire ropes respectively. Sliding bushings are provided at both ends of the pull rod, and a sliding hinge is arranged laterally in each sliding bushing. A small screen slider is hinged to the side of the sliding hinge away from the sliding bushing by an elastic cotter pin, and a second pulley is provided at its rotational connection. The small screen slider is slidably arranged in the guide rail. The bottom of the guide rail is provided with a second pulley bracket, which is fixedly connected to the guide rail by screws. A third pulley is rotatably provided on the second pulley bracket, and a second pin is inserted at the rotatable connection between the third pulley and the second pulley bracket.
[0009] Furthermore, it also includes clips mounted on the guide rail, which are used to secure the wire harness or felt.
[0010] Furthermore, the installation control unit is provided with a third pin, a compression spring is arranged around the third pin, and a fourth pulley is coaxially arranged on the third pin, with the wire rope in contact with the fourth pulley.
[0011] The beneficial effects of this invention are reflected in: In this invention, when the projection screen is needed, the swing mechanism first drives the two guide rails to rotate from the outward swinging storage position to the vertical working position, so that the guide rails are vertically located on the left and right sides of the screen body. Then, the installation control unit controls the roller gearbox assembly to start, driving the roller assembly to rotate forward and gradually release the screen body. The power output by the roller assembly is guided by the first guide assembly and transmitted to the pull rod, so that the pull rod moves smoothly downward along the guide rail with the cooperation of the second guide assembly, driving the screen body to unfold stably. At this time, the two guide rails, the roller assembly, and the pull rod form a rectangular limiting frame to suppress screen shaking and block light leakage. In addition, when the screen needs to be stored, the installation control unit controls the roller gearbox assembly to reverse, driving the roller assembly to roll up the screen body, and the pull rod smoothly returns to its original position along the guide rail. After the screen body is fully rolled up, the swing mechanism drives the two guide rails to swing outward to the storage position, so that it is folded up against the side wall of the vehicle body to free up the front seat adjustment space. Attached Figure Description
[0012] Figure 1 This is a perspective view of the present invention; Figure 2 This is a schematic diagram of the unfolded state of the present invention; Figure 3 This is a schematic diagram illustrating the retraction of the present invention; Figure 4 In this invention Figure 1 A magnified view of a portion of A shown; Figure 5 In this invention Figure 1 A magnified view of part B shown; Figure 6 This is a schematic diagram of the unfolded layout of the present invention; Figure 7 This is a schematic diagram of the collapsible layout of the present invention.
[0013] In the picture: 1. Screen mounting body; 2. Control PCBA; 3. Controller housing; 4. Roller gearbox assembly; 5. Winding wheel; 6. Connector; 7. Roller; 8. Screen body; 9. Steel wire rope; 10. First pulley bracket; 11. First pulley; 12. First opening retaining ring; 13. First pin; 14. Guide rail; 15. Buckle; 16. Pull rod; 17. Adhesive-backed felt; 18. Tension spring; 19. Sliding bushing; 20. Sliding hinge; 21. Elastic cotter pin; 22. Second pulley; 23. Screen slider; 24. Screw; 25. Third pulley; 26. Second pulley bracket; 27. Second pin; 28. Third pin; 29. Fourth pulley; 30. Compression spring. Detailed Implementation
[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0015] Please see Figure 1-7 This invention discloses a vehicle-mounted projection screen cable drive structure, including an installation control unit located on the roof of the vehicle. The installation control unit is equipped with a roller gearbox assembly 4, which can control the start and stop of the roller gearbox assembly 4. A roller assembly is provided at the moving end of the roller gearbox assembly 4. After the roller gearbox assembly 4 is started, it can drive the roller assembly to rotate. A screen body 8 is wound on the roller assembly, and guide rails 14 are provided on both the left and right sides of the screen body 8. First guide components are provided on both sides of the bottom of the installation control unit, which are used to guide the power output by the roller assembly to the pull rod 16 to drive the screen body 8 to rise and fall.
[0016] In one embodiment, the device further includes a swing mechanism, which is installed inside the vehicle. Specifically, the guide rail 14 is connected to the moving end of the swing mechanism. The swing mechanism is used to drive the guide rail 14 to swing and adjust, so that the guide rail 14 can switch between a vertical working position and an outward swinging and storage position. A pull rod 16 is provided at one end of the curtain body 8 away from the roller assembly, and a second guide assembly is provided on both sides of the pull rod 16. Each second guide assembly is rotatably and telescopically connected to the corresponding guide rail 14. When the curtain body 8 is unfolded, it can cooperate with the roller assembly and the first guide assembly to make the curtain body 8 smoothly rise and fall along the setting direction of the guide rail 14.
[0017] The aforementioned swing mechanism can be a drive device that drives a power source, such as a vehicle body actuator. Since this mechanism is common knowledge in the field, its specific structural composition and working principle will not be elaborated on in detail here.
[0018] In practice, when the projection screen is needed, the swing mechanism first drives the two guide rails 14 to rotate from the outward swinging storage position to the vertical working position, so that the guide rails 14 are vertically located on the left and right sides of the screen body 8. Then, the control unit controls the roller gearbox assembly 4 to start, driving the roller assembly to rotate forward and gradually release the screen body 8. The power output by the roller assembly is transmitted to the pull rod 16 after being guided by the first guide assembly, so that the pull rod 16 moves smoothly downward along the guide rails 14 with the cooperation of the second guide assembly, driving the screen body 8 to unfold stably. At this time, the two guide rails 14, the roller assembly, and the pull rod 16 form a rectangular limiting frame to suppress screen shaking and block light leakage.
[0019] In addition, when the curtain needs to be stored, the control unit controls the roller gearbox assembly 4 to reverse, driving the roller assembly to roll up the curtain body 8, and the pull rod 16 smoothly returns to its original position along the guide rail 14; after the curtain body 8 is fully rolled up, the swing mechanism drives the two guide rails 14 to swing outward to the storage position, so that it is folded up against the side wall of the vehicle body, thereby freeing up the front seat adjustment space.
[0020] In one embodiment, the installation control unit includes a curtain mounting body 1 installed on the roof of the vehicle. A controller housing 3 is mounted on the curtain mounting body 1, and a control PCBA2 is installed inside the controller housing 3. The control PCBA2 is used to drive the roller gearbox assembly 4 to start and stop.
[0021] In practice, when the projection screen needs to be used, the control PCBA2 sends a start signal to the roller gearbox assembly 4, causing the roller gearbox assembly 4 to rotate forward, driving the roller assembly to release the screen body 8, and the pull rod 16 to move downward along the guide rail 14, so that the screen body 8 can be stably unfolded and kept flat; when the screen needs to be stored, the control PCBA2 controls the roller gearbox assembly 4 to rotate in reverse, the roller assembly rolls up the screen body 8, and the pull rod 16 returns to its original position, completing the screen storage.
[0022] In one embodiment, the reel gearbox assembly 4 includes a geared motor and a gearbox body disposed at the rotating shaft of the geared motor. The rotating shaft of the geared motor is connected to the input end of the gearbox body. The reel assembly includes a reel 7, and the curtain body 8 is wound on the reel 7. Connectors 6 are respectively installed at both ends of the reel 7. One of the connectors 6 is connected to the output end of the gearbox body. Both connectors 6 are coaxially mounted with winding wheels 5. Steel wire ropes 9 are wound around both winding wheels 5. In use, the two steel wire ropes 9 are wound through the first guide assembly and then connected to tension springs 18 disposed in the pull rod 16. The tension springs 18 are used to apply constant tension to the steel wire ropes 9.
[0023] Furthermore, when the projection screen needs to be used, the geared motor drives the roller 7 to rotate forward through the gearbox body. The roller 7 gradually releases the screen body 8. At the same time, the two connectors 6 drive the winding wheel 5 to rotate synchronously. The steel wire rope 9, after passing through the first guide component, pulls the tension spring 18 inside the pull rod 16, causing the pull rod 16 to move downward smoothly, thereby driving the screen body 8 to unfold stably. During this process, the tension spring 18 applies constant tension to the steel wire rope 9 to prevent the steel wire rope from loosening and derailing, keeping the screen flat. When the screen needs to be stored, the geared motor reverses, the roller 7 winds up the screen body 8, the winding wheel 5 releases the steel wire rope 9 synchronously, and the pull rod 16 returns to its original position, completing the screen storage.
[0024] In one embodiment, the first guide assembly includes a first pulley bracket 10, a first pulley 11, a first open retaining ring 12, and a first pin 13; wherein, the first pin 13 passes through the center hole of the first pulley 11, the first pulley 11 is rotatably mounted on the first pulley bracket 10 via the first pin 13, the first open retaining ring 12 is engaged at the end of the first pin 13 to restrict the axial movement of the first pin 13, and the first pulley bracket 10 is connected to the guide rail 14.
[0025] In practice, the wire rope 9 passes around the first pulley 11, and the first pulley 11 rotates around the first pin 13 to change the extension direction of the wire rope 9, thereby transmitting the power of the roller assembly to the pull rod 16, which facilitates the lifting and lowering of the curtain body 8. The setting of the first opening retaining ring 12 can effectively limit the axial movement of the first pin 13, ensure the smooth rotation of the first pulley 11, reduce the wire rope 9 from derailing and abnormal noise, and improve the reliability of lifting and lowering.
[0026] In one embodiment, the pull rod 16 is hollow inside, and an adhesive felt 17 is pasted on the inner wall of the pull rod 16. A tension spring 18 is installed horizontally inside the pull rod 16. The two ends of the tension spring 18 are hooked and engaged with two steel wire ropes 9 respectively. Sliding bushings 19 are installed at both ends of the pull rod 16. A sliding hinge 20 is installed horizontally in each sliding bushing 19. A small curtain slider 23 is hinged to the side of the sliding hinge 20 away from the sliding bushing 19 by an elastic cotter pin 21. A second pulley 22 is rotatably installed at its rotating connection. The small curtain slider 23 is slidably installed in the guide rail 14. In addition, a second pulley bracket 27 is installed at the bottom of the guide rail 14. The second pulley bracket 27 is fixedly connected to the guide rail 14 by screws 24. A third pulley 26 is rotatably installed on the second pulley bracket 27. A second pin 28 is inserted at the rotating connection between the third pulley 26 and the second pulley bracket 27.
[0027] In practice, during the process of pulling the lever 16, the tension spring 18 is stretched by the steel wire rope 9 and applies constant tension to the steel wire rope 9, thus preventing the steel wire rope 9 from slackening when the vehicle bumps. At the same time, the sliding hinge 20 slides laterally within the sliding bushing 19 to adapt to the displacement generated when the guide rail 14 swings, so that the lever 16 always remains horizontal. When the curtain body 8 moves up and down, the small slider 23 of the curtain slides synchronously on the guide rail 14, so that the lever 16 can be raised and lowered smoothly. Meanwhile, the second pulley 22 guides the steel wire rope 9 to change direction at both ends of the lever 16, and the third pulley 26 rotates around the second pin 28 to change the extension direction of the steel wire rope 9 and reduce the frictional resistance of the steel wire rope 9. The adhesive felt 17 reduces the vibration and noise generated inside the lever 16, so that the curtain body 8 remains flat and stable during the raising and lowering process.
[0028] In one embodiment, the device further includes a clip 15 mounted on the guide rail 14, the clip 15 being used to secure the wire harness or felt.
[0029] This design effectively prevents the wiring harness from shaking and interfering with other components while the vehicle is in motion, reduces abnormal noise, and improves the overall structural stability.
[0030] In one embodiment, a third pin 29 is inserted into the mounting control unit, a compression spring 31 is arranged around the third pin 29, and a fourth pulley 30 is coaxially arranged on the third pin 29, with the wire rope 9 in contact with the fourth pulley 30.
[0031] In practice, the wire rope 9 contacts the fourth pulley 30 during transmission. The fourth pulley 30 rotates around the third pin 29 to guide the direction of the wire rope 9. At the same time, the compression spring 31 provides elastic buffering in the axial direction of the fourth pulley 30, absorbing the axial movement of the wire rope 9 caused by vehicle bumps or winding, thereby further reducing the wire rope 9 from derailing and abnormal noise, making the power transmission more stable. Therefore, it can effectively ensure that the curtain body 8 is subjected to uniform force and operates reliably during the lifting process.
[0032] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.
[0033] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.
[0034] Additionally, "multiple" refers to two or more.
[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A cable-driven structure for a vehicle-mounted projection screen, characterized in that, include: The control unit is installed in the roof of the vehicle. A reel gearbox assembly (4) is mounted on the mounting control unit, which is capable of controlling the start and stop of the reel gearbox assembly (4); A reel assembly is disposed at the moving end of the reel gearbox assembly (4), which, when started, can drive the reel assembly to rotate. The curtain body (8) is wound onto the roller assembly; Two guide rails (14) are respectively set on the left and right sides of the curtain body (8); The first guide assembly, which consists of two components and is respectively located on both sides of the bottom of the installation control unit, is used to guide the power output from the roller assembly to the pull rod (16) so as to drive the curtain body (8) to rise and fall. The swing mechanism is installed inside the vehicle. The guide rail (14) is connected to the moving end of the swing mechanism. The swing mechanism is used to drive the guide rail (14) to swing and adjust, so that the guide rail (14) can switch between the vertical working position and the outward swing and storage position. A pull rod (16) is located at one end of the curtain body (8) away from the roller assembly; The second guide component consists of two components, which are respectively located on both sides of the pull rod (16). Each second guide component is rotatably and telescopically connected to the corresponding guide rail (14). When the curtain body (8) is unfolded, it can work with the roller assembly and the first guide component to make the curtain body (8) smoothly rise and fall along the setting direction of the guide rail (14).
2. The vehicle-mounted projection screen cable-driven structure according to claim 1, characterized in that: The installation control unit includes a curtain installation body (1) located on the roof of the vehicle. A controller housing (3) is provided on the curtain installation body (1). A control PCBA (2) is provided inside the controller housing (3). The control PCBA (2) is used to drive the roller gearbox assembly (4) to start and stop.
3. The vehicle-mounted projection screen cable-driven structure according to claim 1, characterized in that: The reel gearbox assembly (4) includes a geared motor and a gearbox body disposed at the rotating shaft of the geared motor; The roller assembly includes a roller (7), the curtain body (8) is wound on the roller (7), and connectors (6) are provided at both ends of the roller (7). One of the connectors (6) is connected to the output end of the gearbox body. Both connectors (6) are coaxially provided with winding wheels (5), and steel wire ropes (9) are wound around both winding wheels (5). The two wire ropes (9) are connected to tension springs (18) located in the tie rod (16) after passing through the first guide assembly. The tension springs (18) are used to apply constant tension to the wire ropes (9).
4. The vehicle-mounted projection screen cable-driven structure according to claim 1, characterized in that: The first guide assembly includes a first pulley bracket (10), a first pulley (11), a first open retaining ring (12), and a first pin (13). The first pin (13) passes through the center hole of the first pulley (11). The first pulley (11) is rotatably mounted on the first pulley bracket (10) via the first pin (13). The first open retaining ring (12) is locked at the end of the first pin (13) to restrict the axial movement of the first pin (13). The first pulley bracket (10) is connected to the guide rail (14).
5. The vehicle-mounted projection screen cable-driven structure according to claim 3, characterized in that: The pull rod (16) is hollow inside. Adhesive felt (17) is pasted on the inner wall of the pull rod (16). A tension spring (18) is arranged horizontally inside the pull rod (16). The two ends of the tension spring (18) are hooked to the two steel wire ropes (9) respectively. Sliding bushings (19) are provided at both ends of the pull rod (16). A sliding hinge (20) is provided in each sliding bushing (19) and can slide horizontally. A small curtain slider (23) is hinged to the side of the sliding hinge (20) away from the sliding bushing (19) by an elastic cotter pin (21). A second pulley (22) is provided at its rotating connection. The small curtain slider (23) is slidably arranged in the guide rail (14). The bottom of the guide rail (14) is provided with a second pulley bracket (27), which is fixedly connected to the guide rail (14) by screws (24). A third pulley (26) is rotatably provided on the second pulley bracket (27), and a second pin (28) is inserted at the rotatable connection between the third pulley (26) and the second pulley bracket (27).
6. The vehicle-mounted projection screen cable-driven structure according to claim 1, characterized in that: It also includes a buckle (15) disposed on the guide rail (14), the buckle (15) being used to secure the wire harness or felt.
7. The vehicle-mounted projection screen cable-driven structure according to claim 3, characterized in that: The installation control unit is provided with a third pin (29), a compression spring (31) is arranged around the third pin (29), and a fourth pulley (30) is coaxially arranged on the third pin (29), and the wire rope (9) is in contact with the fourth pulley (30).