Framework structure of automobile seat back plate

Abstract

The utility model discloses a skeleton structure of a back plate of an automobile seat, and relates to the technical field of automobile seats, the bottom end of a support of a back plate frame is rotatably connected with a transmission shaft, a plurality of groups of rolling shaft sleeves are arranged on the outer side of a shaft rod of the transmission shaft, and a backrest belt connected with a headrest frame is wound inside a rolling shaft of each group of rolling shaft sleeve. A tensioning brake mechanism is installed on one side of the support of the back plate frame in the shaft rod direction of the transmission shaft. According to the design, the tensioning brake mechanism serves as a power source, the transmission shaft and the rolling shaft sleeve are driven to rotate in a combined mode, elasticity adjustment is conducted on the tensioning performance of the backrest belt in an elastic belt mode, then the backrest belt is rolled, tensioning adjustment can be conducted on the backrest belt, the backrest of the back plate framework is made to be more hard, and by rolling and unrolling the backrest belt, the back plate framework can be made to be more compact. The back plate framework can be relaxed and adjusted, the back of the back plate framework is softer and more comfortable, and the back requirement of the back plate framework can be flexibly adjusted and controlled according to the driving habit of a driver.

Description

Technical Field

[0001] This utility model relates to the field of automotive seats, and more particularly to a frame structure for an automotive seat back panel. Background Technology

[0002] As the passenger compartment of a car, the main function of a car seat is to provide a comfortable riding experience and protect passenger safety. A car seat is mainly composed of a frame, a seat cushion, a backrest, and an adjustment device. The frame, as the main structure of the car seat, is usually divided into a seat cushion and a backrest panel, providing users with a safe and reliable riding platform. As shown in the car seat frame disclosed on the China Patent Network (publication announcement number CN219544565U), this type of seat frame has an adjustable backrest panel inside the backrest frame. The tilt direction of the adjustable backrest panel can be changed, so that the backrest frame can still provide good support for the human back after changing position.

[0003] However, the aforementioned disclosed patents and existing automotive seat frames still have some shortcomings: Existing methods, which use an adjustable backrest within the seat back frame to provide good support for the driver, rely on a rigid adjustment mechanism for the backrest, limiting the driver's comfort and offering insufficient flexibility. Therefore, those skilled in the art have provided a frame structure for an automotive seat backrest to address the problems mentioned in the background. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a frame structure for a car seat backrest, which solves the problem mentioned in the background art that the existing car seat backrest frame lacks flexibility in backrest comfort adjustment.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a frame structure for a car seat back panel, including a seat cushion frame;

[0006] The seat cushion frame has a backrest frame on one side of the support, and a headrest frame is provided at the top of the support of the backrest frame.

[0007] The bottom end of the support of the back panel frame is rotatably connected to a drive shaft, and multiple sets of take-up sleeves are arranged on the outer side of the shaft of the drive shaft. The back strap connected to the headrest frame is wound inside the roll of each set of take-up sleeves.

[0008] A tensioning and braking mechanism is installed on one side of the support of the back plate frame along the shaft direction of the drive shaft.

[0009] As a further technical solution of this utility model: the tensioning braking mechanism includes a brake housing mounted on the back plate frame along the direction of the transmission shaft. The upper half of the brake housing is rotatably connected to a brake shaft, and a brake handwheel is provided at one end of the shaft of the brake shaft. A support bushing is provided in the middle of the brake housing, and a linkage shaft opposite to the brake shaft and the transmission shaft is rotatably connected inside the bearing seat of the support bushing.

[0010] As a further technical solution of this utility model: a bevel gear A is provided at the other end of the shaft of the brake shaft, and a bevel gear B that meshes with the bevel gear A is provided at the top end of the shaft of the linkage shaft.

[0011] As a further technical solution of this utility model: a transmission worm is provided at the bottom end of the shaft of the linkage shaft, and a transmission worm wheel that meshes with the transmission worm is provided at one end of the shaft of the transmission shaft.

[0012] As a further technical solution of this utility model: the backrest strap is made of elastic band material.

[0013] As a further technical solution of this utility model: the headrest frame is rotatably connected to a tension shaft connected to the backrest strap inside the shell, and multiple sets of torsion springs are arranged on the outer side of the tension shaft opposite to the two adjacent sets of backrest straps.

[0014] As a further technical solution of this utility model: the back plate frame has multiple sets of back support frames arranged in the support back plate.

[0015] This utility model provides a frame structure for a car seat back panel, which has the following advantages compared with the prior art:

[0016] The automotive seat backrest frame designed in this way uses a tensioning and braking mechanism as a power source to drive the combined rotation of the transmission shaft and the winding shaft sleeve. This allows for elastic adjustment of the tension of the elastic band-type backrest strap. By winding up the backrest strap, the tension can be adjusted to make the backrest frame more rigid, while by unwinding it, the backrest frame can be relaxed to make it more soft and comfortable. This allows for flexible adjustment of the backrest according to the driver's driving habits, improving the flexibility and comfort of the automotive seat frame structure. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the skeleton structure of a car seat back panel;

[0018] Figure 2 A rear view of the skeletal structure of a car seat back panel;

[0019] Figure 3 A partial cross-sectional view of the skeleton structure of a car seat back panel;

[0020] Figure 4 This is a schematic diagram of the internal structure of the headrest frame in the skeleton structure of a car seat back panel.

[0021] In the diagram: 1. Seat cushion frame; 2. Backrest frame; 3. Headrest frame; 4. Drive shaft; 5. Retractor sleeve; 6. Backrest belt; 7. Brake housing; 8. Brake handwheel; 9. Back support frame; 10. Brake shaft; 11. Bevel gear A; 12. Bevel gear B; 13. Support sleeve; 14. Linkage shaft; 15. Drive worm gear; 16. Drive worm; 17. Tensioning shaft; 18. Torsion spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4 This utility model provides a technical solution for the skeleton structure of a car seat backrest: a skeleton structure for a car seat backrest includes a seat cushion skeleton 1, a backrest frame 2 is provided on one side of the support of the seat cushion skeleton 1, and a tensioning and braking mechanism is installed on one side of the support of the backrest frame 2 along the shaft direction of the drive shaft 4. The tensioning and braking mechanism includes a brake housing 7 installed on the backrest frame 2 along the shaft direction of the drive shaft 4. The upper half of the brake housing 7 is rotatably connected to a brake shaft 10, and a brake handwheel 8 is provided at one end of the shaft of the brake shaft 10. A support bushing 13 is provided in the middle of the body. A bevel gear A11 is provided at the other end of the shaft of the brake shaft 10. A bevel gear B12 that meshes with the bevel gear A11 is provided at the top of the shaft of the linkage shaft 14. By rotating the brake handwheel 8, the brake shaft 10 is driven to rotate, which in turn drives the bevel gear A11 to rotate. The meshing transmission between the bevel gear A11 and the bevel gear B12 drives the linkage shaft 14 to rotate. As a power source, the transmission shaft 4 is driven to rotate to wind up and unwind the combination of the take-up bushing 5 and the back support belt 6 to provide suitable elastic back support.

[0024] The bearing seat of the support bushing 13 is rotatably connected to a linkage shaft 14 that is opposite to the brake shaft 10 and the transmission shaft 4. A transmission worm 16 is provided at the bottom end of the shaft of the linkage shaft 14, and a transmission worm wheel 15 that meshes with the transmission worm 16 is provided at one end of the shaft of the transmission shaft 4. When the linkage shaft 14 rotates, it drives the transmission worm 16 to rotate. By utilizing the self-locking meshing transmission between the transmission worm 16 and the transmission worm wheel 15, the transmission shaft 4 is driven to rotate at a fixed point, thereby performing fixed-point adjustment of the combination of the winding bushing 5 and the backing belt 6.

[0025] The bottom of the support frame of the backrest frame 2 is rotatably connected to the drive shaft 4, and multiple sets of winding bushings 5 ​​are arranged on the outer side of the shaft of the drive shaft 4. The inside of the winding bushing of each set of winding bushings 5 ​​is wound a backrest strap 6 connected to the headrest frame 3. The backrest strap 6 is made of elastic band material. By making the backrest strap 6 of elastic band material, it has flexible winding and unwinding performance, and its tension can be flexibly adjusted. On the other hand, it has good elastic support performance and can serve as an elastic support component to provide elastic back support for the driver.

[0026] The headrest frame 3 is provided at the top of the support of the backrest frame 2. The tension shaft 17 connected to the backrest belt 6 is rotatably connected inside the shell of the headrest frame 3. Multiple torsion springs 18 are arranged on the outer side of the shaft of the tension shaft 17 between two adjacent backrest belts 6. When the backrest belt 6 is deformed under force, the elastic rotation combination of the tension shaft 17 and the torsion springs 18 can provide elastic tension to the backrest belt 6, forming a double elastic state with the backrest belt 6, providing comfortable elastic back support.

[0027] The back panel frame 2 has multiple sets of back support frames 9 arranged on the back panel. By setting the back support frames 9 on the back panel frame 2, the overall structural strength of the back panel frame is improved.

[0028] The working principle of this utility model is as follows: When the backrest frame is assembled with the car seat, the driver can adjust the backrest according to their own driving habits. During the adjustment process, by turning the brake handwheel 8, the brake shaft 10 is driven to rotate, which in turn drives the combination of bevel gear A11 and bevel gear B12 to drive the linkage shaft 14 to rotate. As a power source, the linkage shaft 14 rotates at the same time, driving the combination of transmission worm gear 16 and transmission worm wheel 15 to rotate the transmission shaft 4 at a fixed point, which winds up and unwinds the combination of the winding sleeve 5 and the backrest belt 6 to provide suitable elastic backrest support. Then, when the backrest belt 6 is tensioned, it is tightened to provide a firmer backrest, while when the backrest belt 6 is wound up and unwinded, it is loosened to provide a softer backrest, which is suitable for the backrest needs of different drivers. It provides drivers with a more comfortable backrest while also offering better performance through flexible adjustment.

[0029] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. A frame structure for a car seat backrest, characterized in that, Including the seat frame (1); The seat frame (1) has a backrest frame (2) on one side of the support, and a headrest frame (3) is provided at the top of the support of the backrest frame (2). The bottom of the support of the back panel frame (2) is rotatably connected to a drive shaft (4), and multiple sets of winding bushings (5) are arranged on the outer side of the shaft of the drive shaft (4). Each set of winding bushings (5) has a backrest strap (6) connected to the headrest frame (3) wound inside the winding shaft. A tensioning brake mechanism is installed on one side of the support of the back plate frame (2) along the shaft direction of the transmission shaft (4). The tensioning brake mechanism includes a brake housing (7) installed on the back plate frame (2) along the shaft direction of the transmission shaft (4). The upper half of the housing of the brake housing (7) is rotatably connected to a brake shaft (10), and a brake handwheel (8) is provided at one end of the shaft of the brake shaft (10). A support bushing (13) is provided in the middle of the housing of the brake housing (7), and a linkage shaft (14) opposite to the brake shaft (10) and the transmission shaft (4) is rotatably connected inside the bearing seat of the support bushing (13).

2. The frame structure of a car seat back panel according to claim 1, characterized in that, The other end of the brake shaft (10) is provided with a bevel gear A (11), and the top end of the linkage shaft (14) is provided with a bevel gear B (12) that meshes with the bevel gear A (11).

3. The frame structure of a car seat back panel according to claim 1, characterized in that, The bottom end of the shaft of the linkage shaft (14) is provided with a transmission worm (16), and one end of the shaft of the transmission shaft (4) is provided with a transmission worm wheel (15) that meshes with the transmission worm (16).

4. The frame structure of a car seat back panel according to claim 1, characterized in that, The backrest strap (6) is made of elastic band material.

5. The frame structure of a car seat back panel according to claim 1, characterized in that, The headrest frame (3) has a tension shaft (17) rotatably connected to the backrest belt (6) inside the shell, and multiple sets of torsion springs (18) are arranged on the outer side of the tension shaft (17) between two adjacent sets of backrest belts (6).

6. The frame structure of a car seat back panel according to claim 1, characterized in that, The back plate frame (2) has multiple sets of back support frames (9) arranged on the support back plate.

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