An electric rolling curtain drive device for the rear seat side curtain of a vehicle

Abstract

The present invention discloses an electric roller curtain drive device for rear seat side curtains of an automobile. The device comprises a main body, a driving actuator, a large side curtain, and a small side curtain. The driving actuator comprises a large side curtain output terminal and a small side curtain output terminal. The large side curtain output terminal is used to control the opening and closing of the large side curtain, and the small side curtain output terminal is used to control the opening and closing of the small side curtain. The driving actuator controls the opening and closing of both the large side curtain and the small side curtain simultaneously. The main body also comprises a connecting frame, which is arranged between the large side curtain and the small side curtain. The large side curtain opens and closes longitudinally along the connecting frame, and the small side curtain opens and closes transversely along the connecting frame. The present invention provides an electric roller curtain drive device for rear seat side curtains of an automobile that can simultaneously drive the opening and closing of both the large side curtain and the small side curtain, has a more compact structure, and is suitable for automobiles.

Description

Technical Field

[0001] The invention relates to the field of automobile parts, in particular to an electric roller curtain driving device for automobile rear seat side curtains. Background Art

[0002] During the use of the car, in order to protect the privacy inside the car and avoid the stuffiness inside the car caused by long-term exposure to light, the rear side windows of the car also need to be adequately covered. At the same time, due to the appearance design of the car body, the side windows of the rear seat often include a large side window and a small side window, so it is necessary to design a large side curtain for the large side window and a small side curtain for the small side window.

[0003] There are two main ways to open and close the large and small side curtains of a car: one is manual opening and closing, but this method is very inconvenient and requires passengers to manually open and close the large and small side curtains respectively, which is very troublesome. In order to reduce operations, some vehicles even keep the small side curtains open all the time, or the small side windows are directly made of opaque materials, thereby reducing the need to use small side curtains; the other is to control the opening and closing of the large and small side curtains through a driver. The driver only needs to remotely control the driver to complete the opening and closing of the large and small side curtains. This method has been recognized by the majority of drivers.

[0004] However, the automatic drive devices used for large side curtains and small side curtains on the market are mostly designed to be separated and independent, with one automatic drive device for the large side curtain and another for the small side curtain. This increases the overall cost of vehicle accessories and requires more control switches, making it difficult to popularize them. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide an electric roller curtain driving device for rear seat side curtains of automobiles, which can simultaneously drive large side curtains and small side curtains to open and close, has a more compact structure and is suitable for automobiles.

[0006] The technical solution adopted by the present invention to solve the above-mentioned problem is: an electric roller curtain drive device for the rear seat side curtain of a car, comprising a main body, the main body comprising a driving actuator, a large side curtain and a small side curtain, the large side curtain being used to open and close the light of the large side window of the rear seat of the car, and the small side curtain being used to open and close the light of the small side window of the rear seat of the car, the driving actuator comprising a large side curtain output end and a small side curtain output end, the large side curtain output end being used to control the opening and closing of the large side curtain, the small side curtain output end being used to control the opening and closing of the small side curtain, the driving actuator simultaneously controls the opening and closing of the large side curtain and the small side curtain, the main body also comprising a connecting frame, the connecting frame being arranged between the large side curtain and the small side curtain, the large side curtain opening and closing along the longitudinal direction of the connecting frame, and the small side curtain opening and closing along the transverse direction of the connecting frame.

[0007] Compared with the prior art, the advantages of the present invention are that the large side curtain output end of the driving actuator is connected to the large side curtain, and the small side curtain output end is connected to the small side curtain, so that the driving actuator can simultaneously drive the large side curtain and the small side curtain to open and close. The design of the connecting frame allows the two sides of the connecting frame to respectively complete the support work of the large side curtain and the small side curtain. The large side curtains are mostly rectangular and need to have corners that can be lifted up to facilitate observation of the external environment. If they are opened and closed horizontally, the observation angle can only be lifted up at the upper or lower end, which is awkward and inconvenient. The small side curtains are mostly sail-shaped and are mostly designed to cater to the contour line of the vehicle body. It is more necessary to ensure the integrity of the unfolding of the small side curtains. If they are unfolded longitudinally, a gap is likely to appear to avoid interference between the unfolded end and the vehicle body. However, when unfolded horizontally, the unfolded end can be moved a distance further along the vehicle body toward the rear to ensure the integrity of the closure.

[0008] As an improvement of the present invention, the main body also includes a connecting frame, which is fixedly connected to the driving actuator. The connecting frame is designed along the curved surface of the large side window. A transmission groove designed along the curved surface of the large side window is provided on the connecting frame. A flexible transmission member connected to the output end of the large side curtain is provided in the transmission groove. The large side curtain includes a hoisting rod and a suspension rod. The hoisting rod is rotatably connected to one end of the connecting frame for recovering the large side curtain. A connecting rod fixedly connected to the flexible transmission member is provided on the suspension rod. When the flexible transmission member moves along the transmission groove, the connecting rod will move synchronously with the flexible transmission member, thereby driving the suspension rod to move. Through the improvement, the deformability of the flexible transmission member is utilized to enable the flexible transmission member to drive the suspension rod to move along the curved surface of the large side window, so as to ensure the fit and parallelism of the large side curtain and the large side window.

[0009] As an improvement of the present invention, the hoisting rod is rotatably connected to a support frame at one end away from the connecting frame. The support frame is designed along the curved surface of the large side window. The support frame is provided with a synchronous transmission groove for the suspension rod to move away from the end of the suspension rod. Through the improvement, the hoisting rod and the suspension rod can be balanced to avoid the hoisting rod and the suspension rod being subjected to force at one end, resulting in deformation of the hoisting rod or the suspension rod connection.

[0010] As an improvement of the present invention, a synchronous flexible transmission member is provided in the synchronous transmission groove, and one end of the suspension rod provided on the support frame is fixedly connected to the synchronous flexible transmission member, and the synchronous flexible transmission member is connected to the output end of the large side curtain through a synchronous transmission connecting rod. Through the improvement, the two ends of the suspension rod move synchronously, making the movement of the suspension rod more stable, rather than one end moving and driving the other end to move, which easily causes the suspension rod to tilt and the movement to get stuck.

[0011] As an improvement of the present invention, the large side curtain also includes a storage box, the rolling rod is arranged in the storage box, when the large side curtain is closed, the suspension rod moves into the storage box, and the storage box is provided with a cover. Through the improvement, the design of the storage box facilitates the collection and installation of the large side curtain, and the design of the cover prevents foreign matter from entering the storage box when the large side curtain is closed, thereby playing a protective role.

[0012] As another improvement of the present invention, the cover is coaxially rotatably connected to a connecting piece via a connecting shaft, and the connecting piece is fixedly connected to the storage box. When the large side curtain is opened, the suspension rod opens the cover and then moves away from the hoisting rod. When the large side curtain is closed, the cover is reset and the storage box is closed. Through this improvement, the connection and installation of the cover and the storage box are achieved.

[0013] When the cam is in the closed position, the spring is engaged with the limit block and the other end of the torsion spring is engaged with the connecting piece, and the cam is engaged with the limit block, and the other end of the torsion spring is engaged with the connecting piece.

[0014] As another improvement of the present invention, a connecting block is provided at the connecting end of the suspension rod and the connecting frame, the connecting rod is arranged on the connecting block, and the connecting block is also provided with a limit platform for abutting against the limit block. Through the improvement, the transmission connection stability of the suspension rod and the connecting frame is guaranteed by the design of the connecting block hole, and the abutment stability between the limit platform and the limit block is guaranteed by the design of the limit platform, and it is guaranteed that the limit block will not separate from the suspension rod, thereby effectively controlling the opening and closing of the cover.

[0015] As another improvement of the present invention, the small side curtain output end is provided with a small side curtain drive connecting gear, the small side curtain is provided with a rack meshing with the small side curtain drive connecting gear, and the large side curtain output end is provided with a large side curtain drive connecting gear, and the large side curtain drive connecting gear is transmission-connected to the large side curtain. Through the improvement, the small side curtain output end controls the opening and closing of the small side curtain and the large side curtain output end controls the opening and closing of the large side curtain.

[0016] As another improvement of the present invention, the drive actuator includes a group of worm gear transmission components and a group of gear transmission components, the worm gear transmission component includes a worm fixedly connected to the output end of the motor and a worm wheel for transmission connection, the gear transmission component includes a drive gear connected to the output end of the large side curtain and the output end of the small side curtain at the same time and a transmission gear for transmission connection, the worm wheel and the transmission gear are coaxially designed as an integral whole, the ring gear radius of the worm wheel is larger than the ring gear radius of the transmission gear, and the ring gear radius of the drive gear is larger than the ring gear radius of the transmission gear. Through the improvement, the drive actuator can greatly increase the transmission ratio of the motor through the transmission ratio of the worm gear assembly and the gear transmission component, thereby achieving the effect of a large number of motor rotations, a small driving distance, and a large driving force, thereby ensuring that a small-power motor is used to achieve the purpose of simultaneously driving the large side curtain and the small side curtain, so that the occupied volume of the overall device is more flat, more suitable for installation in a car, and will not affect the appearance of the car, the flatness of the interior and the interior space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the large side curtain and the small side curtain when they are closed.

[0018] Figure 2 It is a schematic diagram of the structure of the drive actuator of the present invention.

[0019] Figure 3 It is a schematic diagram of the connection structure between the connecting frame and the large side curtain of the present invention.

[0020] Figure 4 It is a schematic diagram of the connection structure between the support frame and the large side curtain of the present invention.

[0021] Figure 5This is a schematic diagram of the connection structure between the support frame and the large side curtain from another perspective of the present invention (without the support frame shell).

[0022] Figure 6 It is a schematic diagram of the inner cross-sectional structure of the storage box of the present invention.

[0023] Figure 7 It is a schematic diagram of the connection structure between the suspension rod and the cover of the present invention.

[0024] Figure 8 It is a schematic diagram of the connection structure of the output end of the small side curtain of the present invention.

[0025] Figure 9 It is a schematic diagram of the connection structure between the output end of the large side curtain and the flexible transmission member of the present invention.

[0026] As shown in the figure: 1. Drive actuator, 1.1. Large side curtain output terminal, 1.2. Small side curtain output terminal, 1.3. Worm, 1.4. Worm gear, 1.5. Transmission gear, 1.6. Drive gear, 1.7. Small side curtain drive connecting gear, 1.8. Large side curtain drive connecting gear, 2. Large side curtain, 2.1. Hoisting rod, 2.2.3. Connecting rod, 2.2.4. Connecting block, 2.2.5. Limiting platform, 2. 3. Storage box, 2.4. Closing cover, 2.5. Connecting shaft, 2.5.1. Control crank, 2.6. Connecting piece, 2.7. Torsion spring, 2.8. Control spring, 2.9. Limit block, 3. Small side curtain, 3.1. Rack, 3.2. Movable block, 4. Connecting frame, 4.1. Transmission slot, 4.2. Flexible transmission part, 5. Support frame, 5.1. Synchronous transmission slot, 5.2. Synchronous flexible transmission part, 5.3. Synchronous transmission connecting rod. DETAILED DESCRIPTION

[0027] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0028] like Figure 1-2As shown, an electric roller curtain drive device for a rear seat side curtain of a car includes a body, the body including a drive actuator 1, a large side curtain 2 and a small side curtain 3, the large side curtain 2 is used to open and close the light of the large side window of the rear seat of the car, and the small side curtain 3 is used to open and close the light of the small side window of the rear seat of the car, the drive actuator 1 includes a large side curtain output terminal 1.1 and a small side curtain output terminal 1.2, the large side curtain output terminal 1.1 is used to control the opening and closing of the large side curtain 2, the small side curtain output terminal 1.2 is used to control the opening and closing of the small side curtain 3, the drive actuator 1 simultaneously controls the opening and closing of the large side curtain 2 and the small side curtain 3, the body also includes a connecting frame 4, the connecting frame 4 is arranged between the large side curtain 2 and the small side curtain 3, The large side curtain 2 opens and closes along the longitudinal direction of the connecting frame 4, and the small side curtain 3 opens and closes along the transverse direction of the connecting frame 4. The driving actuator 1 includes a group of worm gear transmission components and a group of gear transmission components. The worm gear transmission component includes a worm 1.3 fixedly connected to the output end of the motor and a worm wheel 1.4 for transmission connection. The gear transmission component includes a driving gear 1.6 connected to the output end 1.1 of the large side curtain and the output end 1.2 of the small side curtain and a transmission gear 1.5 for transmission connection. The worm wheel 1.4 and the transmission gear 1.5 are coaxially designed as an integrated whole. The gear ring radius of the worm wheel 1.4 is larger than the gear ring radius of the transmission gear 1.5, and the gear ring radius of the drive gear 1.6 is larger than the gear ring radius of the transmission gear 1.5.

[0029] like Figure 3-5 As shown, the connecting frame 4 is fixedly connected to the driving actuator 1, and the connecting frame 4 is designed along the curved surface of the large side window. A transmission groove 4.1 designed along the curved surface of the large side window is provided on the connecting frame 4, and a flexible transmission member 4.2 is provided in the transmission groove 4.1 to be transmission-connected to the output end 1.1 of the large side curtain. The large side curtain 2 includes a hoisting rod 2.1 and a suspension rod 2.2, and the suspension rod 2.2 is the unfolding end of the large side curtain. The hoisting rod 2.1 is rotatably connected to the bottom end of the connecting frame 4 for retrieving the large side curtain 2. The suspension rod 2.2 is provided with a connecting rod 2.2.1 fixedly connected to the flexible transmission member 4.2. When the flexible transmission member 4.2 moves along the transmission groove 4.1 When moving, the connecting rod 2.2.1 will move synchronously with the flexible transmission member 4.2, thereby driving the suspension rod 2.2 to move. The end of the hoisting rod 2.1 away from the connecting frame 4 is rotatably connected to a support frame 5. The support frame 5 is designed along the curved surface of the large side window. The support frame 5 is provided with a synchronous transmission groove 5.1 for the suspension rod 2.2 to move away from the connecting frame 4. A synchronous flexible transmission member 5.2 is provided in the synchronous transmission groove 5.1. One end of the suspension rod 2.2 is provided on the support frame 5 and is fixedly connected to the synchronous flexible transmission member 5.2. The synchronous flexible transmission member 5.2 is transmission-connected to the large side curtain output end 1.1 through the synchronous transmission connecting rod 5.3.

[0030] like Figure 1 、 Figure 6 、 Figure 7 As shown, the large side curtain 2 also includes a storage box 2.3, and the hoisting rod is arranged in the storage box 2.3. When the large side curtain 2 is closed, the hanging rod 2.2 moves into the storage box 2.3. A cover 2.4 is provided on the storage box 2.3. The cover 2.4 is coaxially rotatably connected to a connecting piece 2.6 through a connecting shaft 2.5. The connecting piece 2.6 is fixedly connected to the storage box 2.3. When the large side curtain 2 is opened, the hanging rod 2.2 opens the cover 2.4 and then moves in a direction away from the hoisting rod 2.1. When the large side curtain 2 is closed, the cover 2.4 is reset and the storage box 2.3 is closed. A torsion spring 2.7 is also provided on the connecting shaft 2.5. One end of the torsion spring 2.7 is against the cover 2.4, and the other end of the torsion spring 2.7 is against the connecting piece 2.6. The connecting shaft 2.5 is provided with a control crank 2.5.1 at one end close to the connecting frame 4, and a control spring 2.8 is connected to the control crank 2.5.1. The other end of the control spring 2.8 is fixedly connected to the limit block 2.9. When the large side curtain 2 is closed, the suspension rod 2.2 is provided between the limit block 2.9 and the control crank 2.5.1, and the suspension rod 2.2 and the limit block 2.9 are offset, and the control spring 2.8 is in a stretched state. The reset force of the control spring 2.8 is greater than the reset force of the torsion spring 2.7. The connecting end of the suspension rod 2.2 and the connecting frame 4 is provided with a connecting block 2.2.2, the connecting rod 2.2.1 is provided on the connecting block 2.2.2, and the connecting block 2.2.2 is also provided with a limit platform 2.2.3 for offsetting the limit block 2.9.

[0031] A coil spring is provided in the hoisting rod 2.1. When the large side curtain 2 is opened, the coil spring contracts. When the large side curtain 2 is closed, the potential energy of the coil spring is released, and the large side curtain 2 is rotated and recovered. This technology is conventional technology.

[0032] like Figure 8 As shown, the small side curtain output end 1.2 is equipped with a small side curtain drive connecting gear 1.7. The small side curtain 3 is equipped with a rack 3.1 that meshes with the small side curtain drive connecting gear 1.7. The small side curtain 3 includes a movable block 3.2 and a hoisting rod 2.1. The movable block 3.2 serves as the unfolding end of the small side curtain. The hoisting rod 2.1 on the small side curtain 3 has the same structure as the upper hoisting rod 2.1 of the large side curtain 2. The hoisting rod 2.1 on the small side curtain 3 is housed within the connecting frame 4. The movable block 3.2 is sail-shaped, so that it conforms to the structure of the small side window when opened. The small side curtain drive connecting gear 1.7 is equipped with two gears: one meshes with the drive gear 1.6, and the other meshes with the rack 3.1.

[0033] like Figure 9As shown, the large side curtain output end 1.1 is provided with a large side curtain drive connecting gear 1.8, one end of the large side curtain drive connecting gear 1.8 is a helical gear structure, and the flexible transmission member 4.2 includes a flexible connecting rod and a coil spring meshing with the helical gear structure, the coil spring is spirally arranged around the flexible connecting rod, and the two ends of the coil spring are respectively fixedly connected to the two ends of the flexible connecting rod, and a pitch is provided between the coil springs. The teeth of the helical gear are meshed with the pitch between the coil springs. During the rotation of the helical gear, the coil spring is driven to move tangentially along the connection of the helical gear. When the large side curtain drive connecting gear rotates, it directly pushes the flexible transmission member 4.2 to move along the transmission groove 4.1, thereby achieving the purpose of the large side curtain output end 1.1 to move the suspension rod.

[0034] The synchronous flexible transmission member 5.2 has the same structure as the flexible transmission member 4.2. Both ends of the synchronous transmission connecting rod 5.3 are provided with connecting gears, one end of which is engaged with the large side curtain driving connecting gear 1.8, and the other end is engaged with the synchronous flexible transmission member 5.2.

[0035] When the large side curtain 2 is opened, the suspension rod 2.2 moves upward, the elastic force of the control spring 2.8 is released, and it is reset. At this time, the reset force of the torsion spring 2.7 is greater than the reset force of the control spring 2.8, and the torsion spring 2.7 is expanded to open the cover 2.4, and the suspension rod 2.2 moves smoothly from the inside of the storage box 2.3 to the outside. When the large side curtain 2 is closed, the suspension rod 2.2 enters the storage box 2.3 and continues to move. The suspension rod 2.2 pulls the limit block 2.9 to continue to move, so that the reset force of the control spring 2.8 is greater than the reset force of the torsion spring 2.7, driving the torsion spring 2.7 to contract, so that the cover 2.4 re-seals the storage box 2.3.

[0036] During the driving process of the actuator 1, the transmission connection structure with a high transmission ratio is first used to make the selected motor smaller in specification, which is more suitable for the field of automotive accessories, and to avoid the need for corresponding deformation of the automobile body due to the selection of the motor. Then, the small side curtain drive connecting gear 1.7 and the large side curtain drive connecting gear 1.8 are driven simultaneously through the separate drive of the drive gear 1.6. By adjusting the drive transmission ratio, the large side curtain 2 and the small side curtain 3 can achieve the effect of closing and opening at the same time. In order to ensure the fit of the large side curtain 2 with the large side window when opened, the present invention selects a flexible transmission member 4.2 as the driving structure for driving the suspension rod 2.2 to move. In order to ensure the stability of the suspension rod 2.2 during movement, the optimal transmission mode of the flexible transmission member 4.2 should be a transmission mode with a small pitch and a high speed. In this way, in the transmission connection with the flexible transmission member 4.2, the smoothness of the flexible transmission member 4.2 in the transmission groove 4.1 is ensured. Compared with the transmission connection of the spur gear, the transmission ratio and the smoothness of the transmission are guaranteed without causing the selection of too large gears, thereby ensuring the compactness of the device and avoiding affecting the appearance of the car itself.

[0037] The above description is merely a description of the preferred embodiment of the present invention and is not to be construed as limiting the scope of the claims. The present invention is not limited to the above embodiment, and variations in the specific structure are permitted. Any variations within the scope of the independent claims of the present invention are also within the scope of protection of the present invention.

Claims

1. An electric roller blind driving device for a rear seat side curtain of a car, comprising a main body, characterized in that: The main body comprises a driving actuator (1), a large side curtain (2) and a small side curtain (3), wherein the large side curtain (2) is used to open and close the light of the large side window of the rear seat of the car, and the small side curtain (3) is used to open and close the light of the small side window of the rear seat of the car, and the driving actuator (1) comprises a large side curtain output end (1.1) and a small side curtain output end (1.2), wherein the large side curtain output end (1.1) is used to control the large side curtain (2) to open and close, and the small side curtain output end (1.2) is used to control the small side curtain (3) to open and close, and the driving actuator (1) controls the large side curtain (2) and the small side curtain (3) to open and close simultaneously, and the main body further comprises a connecting frame (4), wherein the connecting frame (4) is arranged on the large side curtain. Between the curtain (2) and the small side curtain (3), the large side curtain (2) is opened and closed along the longitudinal direction of the connecting frame (4), and the small side curtain (3) is opened and closed along the transverse direction of the connecting frame (4); the connecting frame (4) is fixedly connected to the driving actuator (1); the connecting frame (4) is designed along the arc surface of the large side window; the connecting frame (4) is provided with a transmission groove (4.1) designed along the arc surface of the large side window; a flexible transmission member (4.2) is provided in the transmission groove (4.1) and is transmission-connected to the output end (1.1) of the large side curtain; the large side curtain (2) includes a hoisting rod (2.1) and a suspension rod (2.2); the hoisting rod (2.1) is rotationally connected to one end of the connecting frame (4) for retrieving the large side curtain (2); the suspension rod (2.2) is provided with a connecting rod (2.2.1) fixedly connected to the flexible transmission member (4.2); when the flexible transmission member (4.2) moves along the transmission groove (4.1), the connecting rod (2.2.1) moves synchronously with the flexible transmission member (4.2), thereby driving the suspension rod (2.2) to move; the large side curtain (2) also includes a storage box (2.3); the hoisting rod is arranged in the storage box (2.3); when the large side curtain (2) is closed, the suspension rod (2.2) moves into the storage box (2.3); a cover (2.4) is provided on the storage box (2.3); the cover (2.4) is coaxially rotatably connected to a connecting piece (2.6) through a connecting shaft (2.5); the connecting piece (2.6) is fixedly connected to On the storage box (2.3), when the large side curtain (2) is opened, the suspension rod (2.2) opens the cover (2.4) and then moves in a direction away from the hoisting rod (2.1); when the large side curtain (2) is closed, the cover (2.4) is reset and the storage box (2.3) is closed; a torsion spring (2.7) is further provided on the connecting shaft (2.5); one end of the torsion spring (2.7) is against the cover (2.4); the other end of the torsion spring (2.7) is against the connecting piece (2.6); a control crank (2.5.1) is provided at one end of the connecting shaft (2.5) close to the connecting frame (4); a control spring (2.8) is connected to the control crank (2.5.1); the other end of the control spring (2.8) is fixedly connected to the limit block (2.9), when the large side curtain (2) is closed, the suspension rod (2.2) is arranged between the limit block (2.9) and the control crank (2.5.1), and the suspension rod (2.2) and the limit block (2.9) are in contact with each other, and the control spring (2.8) is in a stretched state, and the reset force of the control spring (2.8) is greater than the reset force of the torsion spring (2.7). The connection end of the suspension rod (2.2) and the connecting frame (4) is provided with a connecting block (2.2.2), the connecting rod (2.2.1) is provided on the connecting block (2.2.2), and the connecting block (2.2.2) is also provided with a limit platform (2.2.3) for contacting the limit block (2.9).

2. The electric roller blind driving device for rear seat side curtains of a car according to claim 1, characterized in that: The end of the hoisting rod (2.1) away from the connecting frame (4) is rotatably connected to a support frame (5), and the support frame (5) is designed along the curved surface of the large side window. The support frame (5) is provided with a synchronous transmission groove (5.1) for the end of the suspension rod (2.2) away from the connecting frame (4) to move.

3. The electric roller blind driving device for rear seat side curtains of a car according to claim 2, characterized in that: A synchronous flexible transmission member (5.2) is provided in the synchronous transmission groove (5.1); one end of the suspension rod (2.2) provided on the support frame (5) is fixedly connected to the synchronous flexible transmission member (5.2); and the synchronous flexible transmission member (5.2) is transmission-connected to the large side curtain output end (1.1) via a synchronous transmission connecting rod (5.3).

4. The electric roller blind driving device for rear seat side curtains of a car according to claim 1, characterized in that: The small side curtain output end (1.2) is provided with a small side curtain drive connecting gear (1.7), the small side curtain (3) is provided with a rack (3.1) meshing with the small side curtain drive connecting gear (1.7), the large side curtain output end (1.1) is provided with a large side curtain drive connecting gear (1.8), and the large side curtain drive connecting gear (1.8) is transmission-connected to the large side curtain (2).

5. The electric roller blind driving device for rear seat side curtains of a car according to claim 1, characterized in that: The drive actuator (1) comprises a set of worm gear transmission components and a set of gear transmission components, wherein the worm gear transmission component comprises a worm (1.3) fixedly connected to the output end of the motor and a worm wheel (1.4) for transmission connection, and the gear transmission component comprises a driving gear (1.6) connected to both the large side curtain output end (1.1) and the small side curtain output end (1.2) and a transmission gear (1.5) for transmission connection, wherein the worm wheel (1.4) and the transmission gear (1.5) are coaxially integrated, the gear ring radius of the worm wheel (1.4) is larger than the gear ring radius of the transmission gear (1.5), and the gear ring radius of the driving gear (1.6) is larger than the gear ring radius of the transmission gear (1.5).

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