Dynamic tension fixing structure based on fixing of automobile seat cover and mounting method of dynamic tension fixing structure

Through the dynamic tension fixing structure, the tension of the mask is automatically adjusted by using the driving motor and tension sensor, which solves the problem of sliding of the mask under the traditional fixing method, and achieves a stable fit between the mask and the seat back, improving the comfort and safety during use.

CN120481824APending Publication Date: 2025-08-15OKE PLASTIC ZHANGJIAGANG
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Patent Information

Application Number
CN202510892965.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2025-08-15

AI Technical Summary

Technical Problem

The traditional car seat mask fixing method is prone to weakening due to friction or bite force during frequent movements and driving, resulting in sliding displacement of the mask, and needs to be adjusted frequently.

Method used

The dynamic tension fixing structure is adopted, including a driving assembly, a connecting assembly and a fastening assembly. The winding roller is driven by a driving motor to wind the connecting belt, and combined with the tension sensor and a fastening assembly, the tension of the mask is automatically adjusted to maintain a fit.

Benefits of technology

The stable fit between the mask and the seat back is achieved, reducing sliding displacement caused by bumps or movements, and improving comfort and safety during use.

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Abstract

The invention relates to the technical field of automobile seats, in particular to a dynamic tension fixing structure based on automobile seat mask fixation and a mounting method thereof.The dynamic tension fixing structure comprises a seat body, a mask body is arranged on the outer side of a backrest part of the seat body, a driving assembly is arranged below the mask body, and a connecting assembly is arranged above the driving assembly; a fastening assembly is arranged above the connecting assembly, the driving assembly comprises a driving box, two driving cavities are symmetrically formed in an inner cavity of the driving box, driving motors are symmetrically and fixedly connected to the left end and the right end of the driving box, winding rollers are arranged in the driving cavities, and the two ends of the winding rollers are rotationally connected with the inner side walls of the driving cavities; and the output end of the driving motor penetrates through the side wall of the driving box and is fixedly connected with the adjacent end of the wind-up roller, and the dynamic adjustment can be carried out on the mask body when the mask body on the outer side of the backrest part of the seat body generates an upward sliding position due to frequent actions of a driver and passengers and the bumping effect of a vehicle in the driving process.
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Description

Technical Field

[0001] The invention relates to the technical field of automobile seats, in particular to a dynamic tension fixing structure based on fixing an automobile seat cover and an installation method thereof. Background Art

[0002] Car seats are important components in a car that bear the weight of the driver and passengers, providing support and comfort. They are usually composed of a seat cushion, backrest, and headrest. The seat cushion supports the lower body, the backrest fits the back, providing support for the waist, shoulders, and other parts, and the headrest protects the neck. Car seats have multiple adjustment methods, and some high-end models are also equipped with seat heating, ventilation, and massage functions. In addition, car seats also play a key role in safety. They are equipped with seat belts and work in conjunction with the vehicle body structure to ensure the safety of drivers and passengers during driving. Car seat covers are the part of the car seat surface that comes into direct contact with the human body. Their material, design, and performance have a significant impact on the comfort and safety of the driver and passengers. Seat covers are made of a wide variety of materials. In addition to the material, seat covers must also meet a series of physical performance requirements to ensure their durability and safety during long-term use. In terms of design, the shape and color of seat covers are also important factors that attract consumers to buy cars. When installing a mask on a car seat, the mask must first be placed on the outside of the seat, and then fixed and fitted by means of straps, buckles or Velcro. Although these methods have a certain fixing and fitting effect, they rely on the friction or bite force after manual tightening. Under the frequent movements of the driver and passengers and the bumps of the vehicle during driving, such as when getting on and off the vehicle, the friction between the body and the mask on the seat back will generate an upward thrust. When braking or accelerating suddenly, the body inertia will instantly pull the mask, causing the friction or bite force of the traditional installation method to gradually weaken or even fail, and causing the mask on the seat back to gradually slide upward, so that after a period of use, the position needs to be adjusted and fixed again. Therefore, to address the above problems, a dynamic tension fixing structure based on the fixation of the car seat mask is proposed. Summary of the Invention

[0003] The object of the present invention is to provide a dynamic tension fixing structure based on fixing of a car seat cover, so as to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: A dynamic tension fixing structure based on fixing a car seat mask includes a seat body, a mask body is provided on the outside of the backrest part of the seat body, a drive assembly is provided below the mask body, a connecting assembly is provided above the drive assembly, and a fastening assembly is provided above the connecting assembly. The drive assembly includes a drive box, and the inner cavity of the drive box is symmetrically provided with two drive cavities. The left and right ends of the drive box are symmetrically and fixedly connected with a drive motor. A winding roller is provided in the drive cavity, and both ends of the winding roller are rotatably connected to the inner side wall of the drive cavity. The output end of the drive motor passes through the side wall of the drive box and is fixedly connected to the adjacent end of the winding roller. The mask body is set as a bottom opening structure, and the mask body is mounted on the outside of the backrest part of the seat body from top to bottom. The drive assembly is fixedly connected to the connecting assembly, and the connecting assembly is fixedly connected to the fastening assembly.

[0005] As a further optimization of the present invention, the connecting assembly includes two pairs of connecting belts, the bottom ends of the two pairs of connecting belts are fixedly connected to the winding rollers in the two drive cavities respectively, and the top ends of the connecting belts pass through the top wall of the drive box.

[0006] As a further optimization of the present invention, the top end of the connecting belt extends to the bottom of the backrest portion of the seat body, and the top end of the connecting belt is fixedly connected to a tension sensor.

[0007] As a further optimization of the present invention, the fastening assembly includes a fastening clamp seat, the bottom of the fastening clamp seat is fixedly connected to the top of the tension sensor, the fastening clamp seat is a C-shaped setting with an open top, and a threaded groove is provided on the top of one side of the fastening clamp seat.

[0008] As a further optimization of the present invention, a fastening screw is passed through the thread groove, one end of the fastening screw is located on the outside of the fastening clamp seat, and the other end of the fastening screw is located on the inside of the fastening clamp seat, and the fastening screw is threadedly connected to the thread groove.

[0009] As a further optimization of the present invention, one end of the fastening screw away from the fastening clamp is fixedly connected to the adjustment handle, and the other end of the fastening screw away from the adjustment handle is fixedly connected to the fastening pressure block.

[0010] As a further optimization of the present invention, the inner side wall of the fastening clamp away from the thread groove is fixed with an anti-slip pad by adhesive, and the side of the anti-slip pad close to the fastening block is provided with continuous, mutually contacting anti-slip protrusions.

[0011] As a further optimization of the present invention, the thread groove and the anti-slip pad are arranged in corresponding positions, and the fastening block and the anti-slip pad are arranged in corresponding positions and with matching specifications.

[0012] As a further optimization of this utility model, a fastening assembly fixedly connected to a pair of connecting straps through a tension sensor is clamped at the bottom of the front wall of the mask body, and a fastening assembly fixedly connected to the other pair of connecting straps through a tension sensor is clamped at the bottom of the rear wall of the mask body.

[0013] Installation method of dynamic tension fixing structure based on car seat cover fixing: S1: When installing the mask body on the backrest part of the seat body, first place the mask body above the backrest part of the seat body, and put it from top to bottom through the bottom opening of the mask body to the outside of the backrest part of the seat body, and then clamp the fastening assembly to the bottom of the front wall and the bottom of the rear wall of the mask body. When clamping, first place the fastening clamp seat below the bottom of the front wall and the bottom of the rear wall of the mask body, and move the fastening clamp seat up to the bottom of the front wall or the bottom of the rear wall of the mask body and locate it inside the fastening clamp seat. At this time, turn the adjusting handle, and the adjusting handle drives the fastening screw to rotate in the thread groove and move toward the anti-slip pad until the bottom of the front wall or the bottom of the rear wall of the mask body is tightly clamped by the fastening block and the anti-slip pad; S2: After the fastening assembly is clamped on the bottom of the front wall and the bottom of the rear wall of the mask body, it will be connected to the connecting belt through the tension sensor. The connecting belt is fixedly connected to the winding roller. A tension threshold is preset on the tension sensor. The drive motor is controlled by an external controller. The drive motor drives the winding roller to rotate through its output end. The rotation of the winding roller will wind and rewind the connecting belt until the tension of the connecting belt reaches the tension threshold of the tension sensor. At this time, the connecting belt will pull down the bottom of the front wall and the bottom of the rear wall of the mask body through the tension sensor and the fastening assembly, so that the mask body and the outer side of the backrest of the seat body are more closely fitted; S3: When the driver or passenger causes the mask body to slide upward due to their own movements, the displaced mask body will pull the tension sensor through the fastening assembly. At this time, the tension sensor will detect that the actual tension is different from the preset tension threshold. The tension sensor will transmit the data to the external controller, and the external controller will control the drive motor to drive the winding roller to rotate, and continue to pull down the bottom of the front wall and the bottom of the rear wall of the mask body through the connecting belt, the tension sensor and the fastening assembly until the tension of the bottom of the front wall and the bottom of the rear wall of the mask body reaches the preset tension threshold.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the mask body can provide good comfort for the seat body and reflect the style of the car interior. The fastening components can be clamped on the bottom of the front wall and the bottom of the rear wall of the mask body, so that the mask body can be indirectly connected to the connecting component through the fastening components, providing a basis for subsequent dynamic tension adjustment; 2. In the present invention, the connecting assembly can indirectly connect the connecting belt to the mask body through the fastening assembly, so that the connecting belt can drive the mask body to adjust the tension, and the tension sensor can detect the tension of the mask body, thereby providing a basis for subsequent dynamic tension adjustment; 3. In the present invention, the driving assembly can reel in the connecting assembly by its own drive, and can cooperate with the tension sensor to realize dynamic tension adjustment of the mask body according to the degree of reeling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the rear structure of the present invention; Figure 3 A cross-sectional view of a drive assembly of the present invention; Figure 4 It is a structural schematic diagram of the connection component and the fastening component of the present invention; Figure 5 It is an assembly diagram of the connecting component and the fastening component of the present invention; Figure 6 The structure of the fastening assembly of the present invention is schematically shown Figure 1 ; Figure 7 The structure of the fastening assembly of the present invention is schematically shown Figure 2 ; Figure 8 This is a structural diagram of the fastening clamp seat of the present invention; Figure 9 This is a structural exploded view of the fastening bolts of the present invention.

[0016] In the figure: 1. Seat body; 2. Mask body; 3. Drive assembly; 31. Drive box; 32. Drive chamber; 33. Drive motor; 34. Winding roller; 4. Connecting assembly; 41. Connecting belt; 42. Tension sensor; 5. Fastening assembly; 51. Fastening clamp; 52. Threaded groove; 53. Fastening screw; 54. Adjustment handle; 55. Fastening block; 56. Anti-slip pad; 57. Anti-slip protrusion. DETAILED DESCRIPTION

[0017] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0018] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0019] See also Figures 1-9 , the present invention provides a technical solution: A dynamic tension fixing structure based on the fixing of a car seat mask includes a seat body 1, a mask body 2 is provided on the outside of the backrest part of the seat body 1, a driving component 3 is provided below the mask body 2, a connecting component 4 is provided above the driving component 3, and a fastening component 5 is provided above the connecting component 4. The driving component 3 includes a driving box 31, and the inner cavity of the driving box 31 has two driving cavities 32 symmetrically opened. The left and right ends of the driving box 31 are symmetrically and fixedly connected with a driving motor 33. A winding roller 34 is provided in the driving cavity 32, and both ends of the winding roller 34 are rotatably connected to the inner side wall of the driving cavity 32. The output end of the driving motor 33 passes through the side wall of the driving box 31 and is fixedly connected to the adjacent end of the winding roller 34. The mask body 2 is a bottom opening structure. The mask body 2 is arranged on the outside of the backrest part of the seat body 1 from top to bottom. The driving component 3 is fixedly connected to the connecting component 4, and the connecting component 4 is fixedly connected to the fastening component 5.

[0020] As a further implementation scheme of this scheme, the connecting component 4 includes two pairs of connecting belts 41, the bottom ends of the two pairs of connecting belts 41 are fixedly connected to the winding rollers 34 in the two drive cavities 32 respectively, the top end of the connecting belt 41 passes through the top wall of the drive box 31, and the top end of the connecting belt 41 extends to the bottom of the backrest part of the seat body 1. The top end of the connecting belt 41 is fixedly connected with a tension sensor 42. The connecting component 4 can indirectly connect the connecting belt 41 to the mask body 2 through the fastening component 5, so that the connecting belt 41 can drive the mask body 2 to adjust the tension, and the tension sensor 42 can detect the tension of the mask body 2, thereby providing a basis for subsequent dynamic tension adjustment.

[0021] As a further implementation of this solution, the fastening assembly 5 includes a fastening clamp seat 51, the bottom of the fastening clamp seat 51 is fixedly connected to the top of the tension sensor 42, the fastening clamp seat 51 is a C-shaped setting with an open top, a threaded groove 52 is opened on the top of one side of the fastening clamp seat 51, a fastening screw 53 passes through the threaded groove 52, one end of the fastening screw 53 is located on the outside of the fastening clamp seat 51, and the other end of the fastening screw 53 is located on the inside of the fastening clamp seat 51, the fastening screw 53 is threadedly connected to the threaded groove 52, and the end of the fastening screw 53 away from the fastening clamp seat 51 is fixedly connected to the adjusting handle 54, and the fastening screw 53 is away from the adjusting handle One end of the section handle 54 is fixedly connected to a fastening pressure block 55, and the inner wall of the fastening clamp 51 away from the threaded groove 52 is fixedly bonded with an anti-slip pad 56 by adhesive, and the anti-slip pad 56 is provided with continuous, mutually contacting anti-slip protrusions 57 on the side close to the fastening pressure block 55. The threaded groove 52 and the anti-slip pad 56 are arranged in corresponding positions, and the fastening pressure block 55 and the anti-slip pad 56 are arranged in corresponding positions and matching specifications. The fastening assembly 5 can be clamped at the bottom of the front wall and the bottom of the rear wall of the mask body 2, so that the mask body 2 can be indirectly connected to the connecting assembly 4 through the fastening assembly 5, providing a basis for subsequent dynamic tension adjustment.

[0022] As a further implementation of this solution, a pair of fastening components 5 fixedly connected to the top of the connecting straps 41 through the tension sensor 42 are clamped at the bottom of the front wall of the mask body 2, and another pair of fastening components 5 fixedly connected to the top of the connecting straps 41 through the tension sensor 42 are clamped at the bottom of the rear wall of the mask body 2. Such a setting can take into account the bottom front side and the bottom rear side of the full mask body 2, so that the installation tension of the mask body 2 is more balanced.

[0023] Working process: When installing the mask body 2 on the backrest part of the seat body 1, first place the mask body 2 above the backrest part of the seat body 1, and put it from top to bottom through the bottom opening of the mask body 2 to the outside of the backrest part of the seat body 1, and then need to clamp the fastening component 5 at the bottom of the front wall and the bottom of the rear wall of the mask body 2. The fastening component 5 can be clamped at the bottom of the front wall and the bottom of the rear wall of the mask body 2, so that the mask body 2 can be indirectly connected to the connecting component 4 through the fastening component 5, providing a basis for subsequent dynamic tension adjustment. When clamping, first place the fastening clamp seat 51 below the bottom of the front wall and the bottom of the rear wall of the mask body 2, and move the fastening clamp seat 51 up to the bottom of the front wall or the bottom of the rear wall of the mask body 2 at the fastening clamp. Inside the seat 51, the adjusting handle 54 is turned at this time, and the adjusting handle 54 drives the fastening screw 53 to rotate in the thread groove 52 and move toward the anti-slip pad 56 until the bottom of the front wall or the bottom of the rear wall of the mask body 2 is tightly clamped by the fastening block 55 and the anti-slip pad 56. The setting of the anti-slip protrusion 57 can increase the friction between the bottom of the front wall and the bottom of the rear wall of the mask body 2 and the fastening block 55 and the anti-slip pad 56, so as to further improve the tightness of the fastening component 5 and the bottom of the front wall and the bottom of the rear wall of the mask body 2. After the fastening component 5 is clamped at the bottom of the front wall and the bottom of the rear wall of the mask body 2, it will be connected to the connecting belt 41 through the tension sensor 42 in the connecting component 4. The bottom end of the connecting belt 41 is fixedly connected to the winding roller 34. The tension sensor 4 2 will preset a tension threshold, and the drive motor 33 will be controlled by an external controller to operate. The drive component 3 can reel in the connecting belt 41 by itself, and can cooperate with the tension sensor 42 to realize dynamic tension adjustment of the mask body 2 according to the degree of reeling. The drive motor 33 will drive the reeling roller 34 to rotate through its output end, and the rotation of the reeling roller 34 will wind and reel the connecting belt 41 until the tension of the connecting belt 41 reaches the tension threshold of the tension sensor 42. At this time, the connecting belt 41 will pull down the bottom of the front wall and the bottom of the rear wall of the mask body 2 through the tension sensor 42 and the fastening component 5, so that the mask body 2 is more closely fitted to the outer side of the backrest part of the seat body 1. When the driver and passengers are in a state of tension due to their own movements and driving, When the bumpy effect of the vehicle causes the mask body 2 to slide upward, the displaced mask body 2 will pull the tension sensor 42 through the fastening assembly 5. At this time, the tension sensor 42 will detect that the actual tension is different from the preset tension threshold. The tension sensor 42 will transmit the data to the external controller, and the external controller will control the drive motor 33 to drive the winding roller 34 to rotate, and continue to pull down the bottom of the front wall and the bottom of the rear wall of the mask body 2 through the connecting belt 41, the tension sensor 42 and the fastening assembly 5 until the tension of the bottom of the front wall and the bottom of the rear wall of the mask body 2 reaches the preset tension threshold. Therefore, the degree of coverage of the mask body 2 and the seat body 1 can always be maintained, so there is no need to adjust the position and fix it again after using it for a period of time.

[0024] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dynamic tension fixing structure based on fixing a car seat cover, comprising a seat body (1), characterized in that: A mask body (2) is provided on the outside of the backrest portion of the seat body (1); a driving assembly (3) is provided below the mask body (2); a connecting assembly (4) is provided above the driving assembly (3); and a fastening assembly (5) is provided above the connecting assembly (4); The driving assembly (3) includes a driving box (31), the inner cavity of the driving box (31) symmetrically defines two driving cavities (32), the left and right ends of the driving box (31) are symmetrically and fixedly connected to driving motors (33), a winding roller (34) is provided in the driving cavity (32), both ends of the winding roller (34) are rotatably connected to the inner side wall of the driving cavity (32), and the output end of the driving motor (33) passes through the side wall of the driving box (31) and is fixedly connected to an adjacent end of the winding roller (34); The mask body (2) is provided with a bottom opening structure, and the mask body (2) is sleeved on the outer side of the backrest portion of the seat body (1) from top to bottom. The driving component (3) is fixedly connected to the connecting component (4), and the connecting component (4) is fixedly connected to the fastening component (5).

2. The dynamic tension fixing structure based on fixing of the car seat cover according to claim 1 is characterized in that: The connecting assembly (4) comprises two pairs of connecting belts (41), the bottom ends of the two pairs of connecting belts (41) are fixedly connected to the winding rollers (34) in the two drive cavities (32), and the top ends of the connecting belts (41) pass through the top wall of the drive box (31).

3. The dynamic tension fixing structure based on fixing of the car seat cover according to claim 2 is characterized in that: The top end of the connecting belt (41) extends to the bottom of the backrest portion of the seat body (1), and the top end of the connecting belt (41) is fixedly connected to a tension sensor (42).

4. The dynamic tension fixing structure based on fixing of the car seat cover according to claim 1 is characterized in that: The fastening assembly (5) includes a fastening clamp seat (51), the bottom of the fastening clamp seat (51) is fixedly connected to the top of the tension sensor (42), the fastening clamp seat (51) is C-shaped with an open top, and a threaded groove (52) is provided on the top of one side of the fastening clamp seat (51).

5. The dynamic tension fixing structure based on fixing of the car seat cover according to claim 4 is characterized in that: A fastening screw (53) passes through the thread groove (52), one end of the fastening screw (53) is located outside the fastening clamp seat (51), and the other end of the fastening screw (53) is located inside the fastening clamp seat (51), and the fastening screw (53) is threadedly connected to the thread groove (52).

6. The dynamic tension fixing structure based on fixing of the car seat cover according to claim 5, characterized in that: One end of the fastening screw (53) away from the fastening clamp seat (51) is fixedly connected to the adjustment handle (54), and one end of the fastening screw (53) away from the adjustment handle (54) is fixedly connected to the fastening pressing block (55).

7. The dynamic tension fixing structure based on fixing of the car seat cover according to claim 6, characterized in that: An anti-skid pad (56) is fixedly bonded to the inner side wall of the fastening clamp seat (51) away from the thread groove (52) by adhesive, and a continuous, mutually contacting anti-skid protrusion (57) is provided on the side of the anti-skid pad (56) close to the fastening pressing block (55).

8. The dynamic tension fixing structure based on fixing of the car seat cover according to claim 7, characterized in that: The thread groove (52) and the anti-slip pad (56) are arranged in corresponding positions, and the fastening pressing block (55) and the anti-slip pad (56) are arranged in corresponding positions and with matching specifications.

9. The dynamic tension fixing structure based on fixing of a car seat cover according to claim 1, characterized in that: A pair of fastening assemblies (5) fixedly connected above the connecting straps (41) via the tension sensors (42) are clamped at the bottom of the front wall of the mask body (2), and another pair of fastening assemblies (5) fixedly connected above the connecting straps (41) via the tension sensors (42) are clamped at the bottom of the rear wall of the mask body (2).

10. The dynamic tension fixing structure based on fixing of a car seat cover and the installation method thereof according to any one of claims 1 to 9, characterized in that: S1: When the mask body (2) is installed on the backrest part of the seat body (1), the mask body (2) is first placed above the backrest part of the seat body (1), and is put on the outside of the backrest part of the seat body (1) from top to bottom through the bottom opening of the mask body (2), and then the fastening assembly (5) is clamped to the bottom of the front wall and the bottom of the rear wall of the mask body (2). When clamping, the fastening clamp seat (51) is first placed below the bottom of the front wall and the bottom of the rear wall of the mask body (2), and the fastening clamp seat (51) is moved up to the bottom of the front wall or the bottom of the rear wall of the mask body (2) and located inside the fastening clamp seat (51). At this time, the adjusting handle (54) is rotated, and the adjusting handle (54) drives the fastening screw (53) to rotate in the inner thread of the thread groove (52) and move toward the anti-slip pad (56) until the bottom of the front wall or the bottom of the rear wall of the mask body (2) is tightly clamped by the fastening block (55) and the anti-slip pad (56); S2: After the fastening assembly (5) is clamped on the bottom of the front wall and the bottom of the rear wall of the mask body (2), it will be connected to the connecting belt (41) through the tension sensor (42), and the connecting belt (41) will be fixedly connected to the winding roller (34). A tension threshold value will be preset on the tension sensor (42). The driving motor (33) will be controlled by the external controller to operate. The driving motor (33) will drive the winding roller (34) to rotate through its output end. The rotation of the winding roller (34) will wind and reel the connecting belt (41) until the tension of the connecting belt (41) reaches the tension threshold value of the tension sensor (42). At this time, the connecting belt (41) will pull down the bottom of the front wall and the bottom of the rear wall of the mask body (2) through the tension sensor (42) and the fastening assembly (5), so that the mask body (2) and the outer side of the backrest part of the seat body (1) are more closely fitted; S3: When the driver and passenger cause the mask body (2) to slide upward due to their own movements, the displaced mask body (2) will pull the tension sensor (42) through the fastening assembly (5). At this time, the tension sensor (42) will detect that the actual tension is different from the preset tension threshold. The tension sensor (42) will transmit the data to the external controller, and the external controller will control the drive motor (33) to drive the winding roller (34) to rotate, and continue to pull down the bottom of the front wall and the bottom of the rear wall of the mask body (2) through the connecting belt (41), the tension sensor (42) and the fastening assembly (5) until the tension of the bottom of the front wall and the bottom of the rear wall of the mask body (2) reaches the preset tension threshold.