An electric sunshade assembly for a rear seat of a car

Abstract

The present invention discloses an electric sunshade assembly for the rear seat of a vehicle. A small side curtain is provided on the small side window of the rear seat of the vehicle. The height of the small side curtain decreases from the large side window toward the rear of the vehicle. The small side curtain is capable of horizontal expansion and contraction. The small side curtain includes a drum, a small curtain fabric, and an actuator rod. The long end of the small curtain fabric is fixed to the drum, and the short end of the small curtain fabric is fixed to the actuator rod. The drum is also provided with a screw adjustment assembly. The screw adjustment assembly is provided at one end of the drum and is used to adjust the relative height between the drum and the actuator rod. When the actuator rod moves toward the drum, the drum spiral moves downward. When the actuator rod moves away from the drum, the drum spiral moves upward. The present invention provides an electric sunshade assembly for the rear seat of a vehicle that can reduce the need for a conical surface design while ensuring the quality of expansion and closing of the small curtain fabric.

Description

Technical Field

[0001] The present invention relates to the field of automobile accessories, and in particular to an electric sunshade assembly for a rear seat of an automobile. 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] Because of the streamlined design of the car body, the structure of the small side window changes along the streamline of the shell, and the small side curtain also changes along the streamline of the shell, so that the height of the small side curtain decreases from the large side window to the rear of the car.

[0004] In order to realize the automatic expansion and closing of the small side curtain, one way is to design the structure of the drum and the actuator rod for the small side curtain. One end of the small curtain on the small side curtain is fixed on the drum, and the other end is fixed on the actuator rod, and the lateral expansion and closing of the small curtain is realized by the lateral movement of the actuator rod. However, due to the structural limitations of the car shell and the small curtain, the height of the actuator rod will be less than the height of the drum, resulting in that when the actuator rod expands and closes the small curtain, the pulling force of the actuator rod on the small curtain is difficult to maintain the overall tension of the small curtain, that is, in the area where the drum is higher than the height of the actuator rod, the small curtain is prone to slack, resulting in incomplete expansion of the small curtain when it is expanded, and wrinkles and overlaps in some areas of the small curtain when it is closed, affecting the quality of use of the small curtain.

[0005] To address the issue of insufficient deployment of the small curtain, a conical surface design is implemented in the area of ​​the drum where the actuator rod is higher than the drum. The diameter of the cone decreases from the end of the drum toward the middle of the drum. This allows the small curtain to be tightened in the conical area to a smaller distance during deployment, ensuring a more effective deployment. When the small curtain is closed, the conical area can retract more of the small curtain to avoid wrinkles. However, this design has significant limitations. It has poor adaptability. The height difference between the actuator rod and the drum, as well as the travel distance of the actuator rod, will affect the design structure of the cone, resulting in a very large amount of design specification data. Moreover, after long-term use, the small curtain retracted in the conical area is prone to change, affecting the smooth appearance of the small curtain. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an electric sunshade assembly for a rear seat of a car which can reduce the conical surface design and ensure the quality of the unfolding and closing of the small curtain.

[0007] The technical solution adopted by the present invention to solve the above problems is: an electric sunshade curtain assembly for the rear seat of a car, the side windows of the rear seat of the car are provided with two windows, a large side window and a small side window, the large side window is provided with a large side curtain, the small side window is provided with a small side curtain, the height of the small side window decreases from the large side window to the rear of the car, the small side curtain has the same structure as the small side window, the small side curtain is horizontally unfolded and closed, the small side curtain includes a roller, a small curtain and an actuator rod, the long end of the small curtain is fixed on the roller, the short end of the small curtain is fixed on the actuator rod, and the actuator rod The rod unfolds the small curtain by moving away from the drum and closes the small curtain by moving closer to the drum. A coil spring is provided in the drum. When the actuator rod approaches the drum, the coil spring is used to make the drum roll up the small curtain. The drum is arranged at an angle. A screw adjustment assembly is also provided on the drum. The screw adjustment assembly is provided at one end of the drum and is used to adjust the relative height between the drum and the actuator rod. When the actuator rod is at the maximum stroke to unfold the small curtain, the small curtain is in a horizontally unfolded state. When the actuator rod moves toward the direction approaching the drum, the drum spiral moves downward. When the actuator rod moves away from the drum, the drum spiral moves upward.

[0008] Compared with the prior art, the advantages of the present invention are: in the process of the actuator rod unfolding the small curtain, the unfolding height of the small curtain gradually increases, that is, the area of ​​the small curtain on the drum that is higher than the height of the actuator rod gradually increases. Because the force exerted by the actuator rod on the small curtain is only a horizontal force, when the actuator rod completes the tensioning effect on the small curtain in the horizontal direction, the tensioning effect on the small curtain that is higher than the height of the actuator rod will become lower and lower, which eventually leads to poor unfolding effect of the small curtain. By adjusting the relative height between the drum and the actuator rod through the tilt setting of the drum and the screw adjustment assembly, it is possible to achieve that when the actuator rod and the drum are in contact, that is, when the small curtain is in a closed state, the actuator rod maintains the tensioning state of the small curtain, and when the actuator rod moves away from the drum When the actuator rod moves in the horizontal direction, the reel releases a longer small curtain, but at the same time the reel moves spirally upward, so that the horizontal distance between the small curtain moving upward and the actuator rod is closer than the horizontal distance between the small curtain and the actuator rod corresponding to the horizontal direction of the actuator rod. Therefore, when the actuator rod maintains the tension of the small curtain in the horizontal direction, it can also have a certain tightening effect on the small curtain moving upward, so as to ensure that the tensioning effect of the small curtain is always maintained when the actuator rod moves away from the reel, so as to ensure the unfolding effect of the small curtain. Correspondingly, because the small curtain always maintains the tensioning effect during the unfolding process, when the small curtain is retracted by the reel, the small curtain can be avoided from wrinkling, thereby ensuring the quality of the use of the small curtain.

[0009] As an improvement of the present invention, a connecting rod is provided in the reel, one end of the coil spring is fixedly connected to the connecting rod, and the other end of the coil spring is fixedly connected to the reel, and the screw adjustment assembly includes an adjusting shaft, which is fixedly connected to the connecting rod, and an adjusting thread is provided on the outer surface of the adjusting shaft. The end of the reel away from the actuator rod is provided with a threaded sleeve that is threadedly connected to the adjusting thread. When the actuator rod moves away from the reel with the end of the small curtain, the threaded sleeve moves away from the actuator rod while the reel rotates. Through the improvement, the design of the adjusting shaft and the threaded sleeve realizes the movement effect of the reel rotating and moving along the axis direction of the reel.

[0010] As an improvement of the present invention, the other end of the reel is provided with a shaft sleeve, and the shaft sleeve is rotatably connected to the connecting rod. The shaft sleeve and the threaded sleeve are both provided with circumferential limit blocks, and the reel is provided with a circumferential limit groove that cooperates with the circumferential limit block. One end of the coil spring is fixedly connected to the connecting rod by a pin, and the shaft sleeve is provided with a connecting buckle groove, which is used to be fixedly connected to the other end of the coil spring. Through the improvement, the design of the circumferential limit block and the circumferential limit groove can ensure the circumferential limit connection between the shaft sleeve and the reel and the circumferential limit connection between the threaded sleeve and the reel, thereby ensuring the stability of synchronous rotation. The design of the coil spring completes the installation of the coil spring and can realize the reset function of the reel at the same time.

[0011] As an improvement of the present invention, an adjustment member is provided at one end of the connecting rod, and the adjustment member is used to adjust the preload force of the coil spring. Through the improvement, during the long-term use of the small side curtain, the elasticity of the coil spring is lost, resulting in insufficient preload force of the coil spring, thereby affecting the unfolding effect of the small curtain. In the present invention, the unfolding effect of the small curtain is prone to defects, so the design of the adjustment member is even more important.

[0012] When the adjusting member is axially moved and connected to the connecting rod, the adjusting member is connected to the circumferential limit connection of the connecting rod and the adjusting member is connected to the circumferential limit connection of the connecting rod when the preload force needs to be adjusted. The adjusting member is first moved in a direction away from the connecting rod to disengage the fixing rib from the fixing groove, and then the connecting rod is driven to rotate to adjust the preload force. After the preload force adjustment is completed, the adjusting member is reset to make the fixing rib cooperate with the fixing groove. Through the improvement, the connection and installation of the adjusting member are achieved when no adjustment is needed, the adjusting member maintains the fixed state of the adjusting member through the cooperation of the fixing rib and the fixing groove, avoiding the situation of incorrect adjustment. When adjustment is needed, the fixing rib is disengaged from the fixing groove, and then the connecting rod is driven to rotate to adjust the preload force. After the preload force adjustment is completed, the adjusting member is reset to make the fixing rib cooperate with the fixing groove.

[0013] As an improvement of the present invention, the other end of the connecting rod is provided with a gear and a buckle, and the gear is fixedly connected to the connecting rod. The buckle is provided on one side of the gear for the gear to engage with each other to limit the reverse rotation of the gear. Through the improvement, when adjusting the preload, it is adjusted from one end of the connecting rod. Because the connecting rod is connected to the coil spring, it is always under the action of the torsional force of the coil spring. If the other end of the connecting rod is not circumferentially constrained, after the preload is in place, the connecting rod is prone to deformation, and then the preload will have problems again. Therefore, it is necessary to constrain the other end of the connecting rod in place to avoid torsional deformation of the connecting rod. The connection method of the gear and the buckle can ensure the constraining effect of the connecting rod in place, and avoid loose connection after constraint, resulting in loss of constraint.

[0014] As an improvement of the present invention, the actuator rod is movably connected to a transverse guide rail arranged laterally, and a moving groove is provided on both sides of the transverse guide rail. Both sides of the bottom of the actuator rod are provided with moving rods movably connected to the moving groove. The moving rod includes a long moving rod and a short moving rod, one end of the long moving rod is parallel to one end of the short moving rod, and a flexible transmission member is movably connected to the moving groove where the short moving rod is located. The flexible transmission member is transmission-connected to the driver, and one end of the flexible transmission member is fixedly connected to the other end of the short moving rod. When the flexible transmission member moves into the moving groove, the actuator rod is pushed far away The small curtain is unfolded by the winding drum, and when the soft transmission part moves out of the movable groove, the executive rod closes the small curtain under the reset action of the winding spring and the drive of the soft transmission part. Through the improvement, the design of the two movable grooves can ensure the stability of the horizontal movement of the executive rod, avoid the situation where the executive rod is tilted or deflected on one side, so as to ensure the tightening effect of the executive rod on the small curtain, and the design of the soft transmission part acting on the short movable rod can make the point of action of the soft transmission part on the executive rod closer to the center of the executive rod. During the driving process of the executive rod, the deflection force of the executive rod is reduced, so that the executive rod can move more stably.

[0015] As an improvement of the present invention, the soft transmission part is a coil spring transmission part, and the driver is provided with a transmission gear for driving the soft transmission part to move. The soft transmission part is arranged in the track tube, and the track tube is fixed. Through the improvement, the coil spring transmission part can move along the track tube to turn. It is only necessary to fix the position of the track tube to ensure the moving trajectory of the soft transmission part, so as to ensure the driving effect of the soft transmission part on the actuator rod.

[0016] As an improvement of the present invention, the large side curtain is longitudinally expanded and closed. The large side curtain includes a large curtain cloth and a longitudinal expansion rod. The expanded end of the large curtain cloth is fixedly connected to the longitudinal expansion rod. Both ends of the longitudinal expansion rod are connected with soft transmission parts. The soft transmission parts at both ends of the longitudinal expansion rod are respectively movably connected to two longitudinal guide rails. The three soft transmission parts are all driven by the same driver. Through the improvement, it is possible to achieve the expansion and closing of the large side curtain and the small side curtain at the same time by driving one driver.

[0017] As an improvement of the present invention, there are three transmission gears on the driver, and the three transmission gears are respectively connected to the three soft transmission parts. The three transmission gears are coaxial and integrated in design. The diameter ratio between the three transmission gears is proportional to the moving distance ratio of the three soft transmission parts. Through the improvement, due to the streamlined design of the shell, the heights on both sides of the large side curtain and the lateral movement length of the small side curtain are not uniform, so the driver needs to drive the three independently. However, because the driver needs to drive the three soft transmission parts at the same time, it is necessary to design three transmission gears to complete the driving of the three soft transmission parts. Because the three transmission gears are coaxially driven, the angular velocity of the three transmission gears is the same. Therefore, in order to distinguish the transmission speeds of the three soft transmission parts, it is necessary to design the three transmission gears with different linear velocities. The longer the moving distance, the faster the linear velocity, that is, the larger the diameter of the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 It is a schematic diagram of the unfolding structure of the small side curtain of the present invention.

[0020] Figure 3 It is a schematic diagram of the closing structure of the small side curtain of the present invention.

[0021] Figure 4 It is a schematic diagram of the cross-sectional structure of the reel connection of the present invention.

[0022] Figure 5 This is a schematic diagram of the connecting rod connection structure of the present invention (without the winding drum and coil spring).

[0023] Figure 6 It is a schematic diagram of the connection structure of the adjusting member of the present invention.

[0024] Figure 7 It is a schematic diagram of the gear connection structure of the present invention.

[0025] Figure 8 It is a schematic diagram of the structure of the actuator rod of the present invention.

[0026] Figure 9 It is a schematic diagram of the connection structure between the actuator rod and the transverse guide rail of the present invention.

[0027] Figure 10 It is a schematic diagram of the matching structure of the flexible transmission member and the transmission gear of the present invention.

[0028] Figure 11 It is a schematic diagram of the installation structure of the flexible transmission part of the present invention.

[0029] As shown in the figure: 1. Large side curtain, 2. Small side curtain, 3. Reel, 3.1. Coil spring, 3.2. Connecting rod, 3.3. Threaded sleeve, 3.4. Bushing, 3.4.1. Connecting buckle groove, 3.5. Circumferential limit block, 3.6. Circumferential limit groove, 3.7. Pin, 4. Small curtain, 5. Actuator rod, 5.1. Long moving rod, 5.2. Short moving rod, 5.3. Guide block, 6. Screw adjustment assembly, 6.1. Adjusting shaft, 6.1.1. Adjusting thread, 7. Adjusting part, 7.1. Fixing rib, 8. Fixing plate, 8.1. Fixing groove, 9. Gear, 10. Buckle, 11. Transverse guide rail, 11.1. Moving groove, 11.2. Guide groove, 12. Flexible transmission part, 13. Driver, 13.1. Transmission gear, 14. Track tube, 15. Longitudinal expansion rod, 16. Longitudinal guide rail. DETAILED DESCRIPTION

[0030] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0031] like Figure 1-3 As shown, an electric sunshade curtain assembly for the rear seat of a car, the side windows of the rear seat of the car are provided with two windows, a large side window and a small side window, the large side window is provided with a large side curtain 1, the small side window is provided with a small side curtain 2, the height of the small side window decreases from the large side window to the rear of the car, the small side curtain 2 has the same structure as the small side window, the small side curtain 2 is horizontally unfolded and closed, the small side curtain 2 includes a roller 3, a small curtain 4 and an actuator 5, the long end of the small curtain 4 is fixed on the roller 3, the short end of the small curtain 4 is fixed on the actuator 5, the actuator 5 unfolds the small curtain 4 by moving away from the roller 3, and closes the small curtain 4 by moving close to the roller 3, a coil spring 3.1 is provided in the roller 3, and when the actuator 5 approaches the roller 3, the coil spring 3.1 is used to make the roller 3 roll up the small curtain 4, the The reel 3 is arranged at an angle, and a screw adjustment component 6 is also provided on the reel 3. The screw adjustment component 6 is arranged at one end of the reel 3 and is used to adjust the relative height between the reel 3 and the actuator rod 5. When the actuator rod 5 is at the maximum stroke to unfold the small curtain 4, the small curtain 4 is in a horizontally unfolded state. When the actuator rod 5 moves toward the reel 3, the reel 3 spirally moves downward. When the actuator rod 5 moves away from the reel 3, the reel 3 spirally moves upward. By moving in the inclined direction of the reel 3, although the small curtain is opened in the process of unfolding, its unfolding height becomes larger and larger, compared with the solution in which the reel 3 is in a vertical state and does not move axially along the reel 3, the degree of loss of tension is lower, which is more conducive to maintaining the unfolding effect of the small curtain 4 in the unfolded state, and can also better avoid the small curtain 4 from wrinkling when it is recycled.

[0032] like Figure 4-5As shown, a connecting rod 3.2 is provided in the reel 3, one end of the coil spring 3.1 is fixedly connected to the connecting rod 3.2, and the other end of the coil spring 3.1 is fixedly connected to the reel 3, the screw adjustment assembly 6 includes an adjusting shaft 6.1, the adjusting shaft 6.1 is fixedly connected to the connecting rod 3.2, and an adjusting thread 6.1.1 is provided on the outer surface of the adjusting shaft 6.1. The end of the reel 3 away from the actuator rod 5 is provided with a threaded sleeve 3.3 that is threadedly connected to the adjusting thread 6.1.1. When the actuator rod 5 moves with one end of the small curtain 4 away from the reel 3, the reel 3 During the rotation, the threaded sleeve 3.3 moves in the direction away from the actuator rod 5. The other end of the reel 3 is provided with a sleeve 3.4, and the sleeve 3.4 is rotatably connected to the connecting rod 3.2. The sleeve 3.4 and the threaded sleeve 3.3 are both provided with circumferential limit blocks 3.5. The reel 3 is provided with a circumferential limit groove 3.6 that cooperates with the circumferential limit block 3.5. One end of the coil spring 3.1 is fixedly connected to the connecting rod 3.2 by a pin 3.7. The sleeve 3.4 is provided with a connecting buckle groove 3.4.1, and the connecting buckle groove 3.4.1 is used to be fixedly connected to the other end of the coil spring 3.1.

[0033] like Figure 4-7 As shown, one end of the connecting rod 3.2 is provided with an adjusting piece 7, and the adjusting piece 7 is used to adjust the preload force of the coil spring 3.1. One end of the connecting rod 3.2 is also provided with a fixing plate 8, and a fixing groove 8.1 is provided on the fixing plate 8. The circumferential direction of the adjusting piece 7 is provided with a fixing rib 7.1. When the fixing groove 8.1 cooperates with the fixing rib 7.1, the adjusting piece 7 is circumferentially limited and connected to the fixing plate 8. The adjusting piece 7 is axially connected to the connecting rod 3.2 and the adjusting piece 7 is circumferentially limited and connected to the connecting rod 3.2. When the preload force needs to be adjusted, the adjusting piece 7 first moves in a direction away from the connecting rod 3.2 to disengage the fixing rib 7.1 from the fixing groove 8.1, and then drives The connecting rod 3.2 is rotated to adjust the preload. After the preload is adjusted, the adjusting member 7 is reset to make the fixing rib 7.1 cooperate with the fixing groove 8.1. The other end of the connecting rod 3.2 is provided with a gear 9 and a buckle 10. The gear 9 is fixedly connected to the connecting rod 3.2. The buckle 10 is provided on one side of the gear 9 for the gear 9 to engage with the gear to limit the reverse rotation of the gear 9. The design of the adjusting member 7 can better ensure the tensioning state of the small curtain 4, because the tensioning force of the small curtain 4 is easy to be lost during the unfolding process. The tensioning force of the small curtain 4 cannot be too small when it is in the closed state, which can easily cause the final unfolding effect of the small curtain 4 to be poor.

[0034] like Figure 8-9As shown, the actuator rod 5 is movably connected to a transverse guide rail 11 arranged laterally, and a moving groove 11.1 is provided on both sides of the transverse guide rail 11. Both sides of the bottom of the actuator rod 5 are provided with moving rods movably connected to the moving groove 11.1. The moving rods include a long moving rod 5.1 and a short moving rod 5.2. One end of the long moving rod 5.1 is parallel to one end of the short moving rod 5.2. A flexible transmission member 12 is movably connected to the moving groove 11.1 where the short moving rod 5.2 is located. The flexible transmission member 12 is a coil spring transmission member. The flexible transmission member 12 is transmission-connected to the driver 13. One end of the flexible transmission member 12 is fixedly connected to the other end of the short moving rod 5.2. The connecting end of the flexible transmission member 12 and the short moving rod 5.2 is provided with a welding 1 and 1. The flexible transmission member 12 is welded to the other end of the short moving rod 5.2 by welding. When the flexible transmission member 12 moves into the moving groove 11.1, the executive rod 5 is pushed away from the reel 3 to unfold the small curtain 4. When the flexible transmission member 12 moves out of the moving groove 11.1, the executive rod 5 closes the small curtain 4 under the reset action of the coil spring 3.1 and the drive of the flexible transmission member 12. In order to ensure the stability of the executive rod 5 moving on the transverse guide rail 11, a guide groove 11.2 is also provided on the transverse guide rail 11, and a guide block 5.3 matching the guide groove 11.2 is provided on the executive rod 5. When the flexible transmission member 12 pushes the short moving rod 5.2, it is easy to cause the long moving rod 5.1 to deflect. Therefore, the guide block 5.3 is provided on one side of the long moving rod 5.1 and above the long moving rod 5.1.

[0035] like Figure 1 、 Figure 10 、 Figure 11As shown, the driver 13 is provided with a transmission gear 13.1 for driving the soft transmission member 12 to move, and the soft transmission member 12 is provided in the track tube 14. The track tube 14 is fixedly arranged in the car door to prevent the bending angle of the track tube 14 from being too large, causing the soft transmission member 12 to move and become stuck. The large side curtain 1 is longitudinally unfolded and closed. The large side curtain 1 includes a large curtain and a longitudinal unfolding rod 15. The unfolding end of the large curtain is fixedly connected to the longitudinal unfolding rod 15. Both ends of the longitudinal unfolding rod 15 are connected to the soft transmission member 12. The fixing method of the two ends of the longitudinal unfolding rod 15 and the soft transmission member 12 is the same as that of the executive rod 5 and the soft transmission member 12. The fixing method of the transmission members 12 is the same. The movable connection between the two ends of the longitudinal expansion rod 15 and the longitudinal guide rails 16 belongs to the conventional limited movement technology. The soft transmission members 12 at both ends of the longitudinal expansion rod 15 are respectively movably connected to the two longitudinal guide rails 16. The three soft transmission members 12 are all driven by the same driver 13. There are three transmission gears 13.1 on the driver 13. The three transmission gears 13.1 are respectively connected to the three soft transmission members 12. The three transmission gears 13.1 are coaxial and integrated. The diameter ratio between the three transmission gears 13.1 is proportional to the moving distance ratio of the three soft transmission members 12. The large side curtain 1 is also provided with its own dedicated roller 3, but because the moving end of the large side curtain 1 moves as a whole, and the difference in moving distance between the two sides of the large side curtain 1 is small, the deviation of the tensioning force is small, and it is easy to ensure the overall unfolding effect of the large side curtain 1 at the same time. Therefore, there is no need to design a screw adjustment component 6. It is only necessary to ensure the synchronization of the unfolding of the two ends of the longitudinal unfolding rod 15 through the design of the corresponding transmission gear 13.1.

[0036] 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 sunshade assembly for a rear seat of a car, characterized by: The side windows of the rear seat of a car are provided with two windows, a large side window and a small side window, the large side window is provided with a large side curtain (1), the small side window is provided with a small side curtain (2), the height of the small side window decreases from the large side window to the rear of the car, the small side curtain (2) has the same structure as the small side window, the small side curtain (2) is horizontally unfolded and closed, the small side curtain (2) comprises a roller (3), a small curtain (4) and an actuator (5), the length of the small curtain (4) is One end of the small curtain (4) is fixed to the reel (3), and the short end of the small curtain (4) is fixed to the actuator rod (5). The actuator rod (5) unfolds the small curtain (4) by moving away from the reel (3) and closes the small curtain (4) by moving closer to the reel (3). A coil spring (3.1) is provided in the reel (3). When the actuator rod (5) moves closer to the reel (3), the coil spring (3.1) is used to make the reel (3) roll up the small curtain (4). The reel (3) is arranged in an inclined manner. The reel (3) is also provided with a screw adjustment assembly (6), which is provided at one end of the reel (3) and is used to adjust the relative height between the reel (3) and the actuator (5). When the actuator (5) is at its maximum stroke to unfold the small curtain (4), the small curtain (4) is in a horizontal unfolding state. When the actuator (5) moves toward the reel (3), the reel (3) moves spirally downward. When the actuator (5) moves away from the reel (3), the reel (3) moves spirally upward. A connecting rod (3.2) is provided in the reel (3). One end of the coil spring (3.1) is fixedly connected to the connecting rod (3.2), and the other end of the coil spring (3.1) is fixedly connected to the reel (3). The screw adjustment assembly (6) includes an adjustment shaft (6.1), which is fixedly connected to the connecting rod (3.2). An adjustment thread ( 6.1.1), the end of the reel (3) away from the actuator rod (5) is provided with a threaded sleeve (3.3) threadedly connected to the adjusting thread (6.1.1), when the actuator rod (5) moves in a direction away from the reel (3) with one end of the small curtain (4), the reel (3) rotates and the threaded sleeve (3.3) moves in a direction away from the actuator rod (5), and the other end of the reel (3) is provided with a shaft sleeve (3.4), which is rotatably connected to the connecting rod (3.2 ), the shaft sleeve (3.4) and the threaded sleeve (3.3) are both provided with circumferential limit blocks (3.5), the reel (3) is provided with a circumferential limit groove (3.6) that matches the circumferential limit block (3.5), one end of the coil spring (3.1) is fixedly connected to the connecting rod (3.2) via a pin (3.7), the shaft sleeve (3.4) is provided with a connecting buckle groove (3.4.1), and the connecting buckle groove (3.4.1) is used for fixed connection with the other end of the coil spring (3.1).

2. The electric sunshade assembly for the rear seat of a car according to claim 1, characterized in that: An adjusting member (7) is provided at one end of the connecting rod (3.2), and the adjusting member (7) is used to adjust the preload force of the coil spring (3.1).

3. The electric sunshade assembly for the rear seat of a car according to claim 2, characterized in that: One end of the connecting rod (3.2) is further provided with a fixing plate (8), the fixing plate (8) is provided with a fixing groove (8.1), and the adjusting member (7) is provided with a fixing rib (7.1) on the circumference. When the fixing groove (8.1) and the fixing rib (7.1) are matched, the adjusting member (7) is circumferentially limited and connected to the fixing plate (8). The adjusting member (7) is axially movable and connected to the connecting rod (3.2), and the adjusting member (7) and the connecting rod (3.2) are circumferentially limited. When the preload force needs to be adjusted, the adjusting member (7) first moves in a direction away from the connecting rod (3.2) to disengage the fixing rib (7.1) from the fixing groove (8.1), and then drives the connecting rod (3.2) to rotate to adjust the preload force. After the preload force adjustment is completed, the adjusting member (7) is reset to make the fixing rib (7.1) match the fixing groove (8.1).

4. The electric sunshade assembly for the rear seat of a car according to claim 3, characterized in that: The other end of the connecting rod (3.2) is provided with a gear (9) and a buckle (10); the gear (9) is fixedly connected to the connecting rod (3.2); the buckle (10) is provided on one side of the gear (9) and is used for engaging the gears (9) to limit the gear (9) from rotating in the opposite direction.

5. The electric sunshade assembly for a rear seat of a car according to claim 1, characterized in that: The actuator rod (5) is movably connected to a transverse guide rail (11) arranged transversely. A moving groove (11.1) is provided on both sides of the transverse guide rail (11). Both sides of the bottom of the actuator rod (5) are provided with moving rods movably connected to the moving groove (11.1). The moving rods include a long moving rod (5.1) and a short moving rod (5.2). One end of the long moving rod (5.1) is parallel to one end of the short moving rod (5.2). The moving groove (11.1) where the short moving rod (5.2) is located is movably connected to a soft transmission rod. The flexible transmission member (12) is in transmission connection with the driver (13), one end of the flexible transmission member (12) is fixedly connected to the other end of the short moving rod (5.2), and when the flexible transmission member (12) moves into the moving groove (11.1), the executing rod (5) is pushed away from the reel (3) to unfold the small curtain (4), and when the flexible transmission member (12) moves out of the moving groove (11.1), the executing rod (5) closes the small curtain (4) under the reset action of the coil spring (3.1) and the drive of the flexible transmission member (12).

6. The electric sunshade assembly for the rear seat of a car according to claim 5, characterized in that: The flexible transmission member (12) is a coil spring transmission member, and the driver (13) is provided with a transmission gear (13.1) for driving the flexible transmission member (12) to move. The flexible transmission member (12) is arranged in a track tube (14), and the track tube (14) is fixed.

7. The electric sunshade assembly for the rear seat of a car according to claim 6, characterized in that: The large side curtain (1) is longitudinally unfolded and closed. The large side curtain (1) comprises a large curtain fabric and a longitudinal unfolding rod (15). The unfolding end of the large curtain fabric is fixedly connected to the longitudinal unfolding rod (15). Both ends of the longitudinal unfolding rod (15) are connected to flexible transmission members (12). The flexible transmission members (12) at both ends of the longitudinal unfolding rod (15) are movably connected to two longitudinal guide rails (16) respectively. The three flexible transmission members (12) are all driven by the same driver (13).

8. The electric sunshade assembly for the rear seat of a car according to claim 7, characterized in that: There are three transmission gears (13.1) on the driver (13), and the three transmission gears (13.1) are respectively connected to the three flexible transmission members (12). The three transmission gears (13.1) are coaxial and integrally designed, and the diameter ratio between the three transmission gears (13.1) is proportional to the moving distance ratio of the three flexible transmission members (12).

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