Automobile rear seat, vehicle, method for controlling gap between automobile rear seats

Abstract

The application provides a rear seat of a vehicle, a vehicle and a method for controlling a gap between rear seats of a vehicle. The rear seat of the vehicle comprises a seat body and a shielding assembly integrated in an inner side of a backrest or a surface of the backrest of the seat body. The shielding assembly has an unfolded state away from the seat body and a working state in which the shielding assembly is retracted to different positions relative to the seat body. When the shielding assembly is in the unfolded state or the working state, the seat body has a certain gap with a parcel shelf, and the gap range is less than 5 mm. The application solves the problem of excessive gap between the rear seat and the parcel shelf in the prior art.

Description

Technical Field

[0001] This invention relates to the field of automotive seat technology, and more specifically, to a method for controlling the gap between a rear seat, a vehicle, and the rear seat of a car. Background Technology

[0002] In the current technology, with the upgrading of automobile consumption, zero-gravity seats and large-angle semi-reclining seats have become core comfort features of mid-to-high-end passenger vehicles. The backrests of these seats need to be able to achieve a wide range of adjustment from 0° to 170° to meet the diverse needs of users such as rest, working, and long-distance travel.

[0003] However, when the second-row seat backrests are adjusted to a large angle, there is an inevitable risk of movement interference with the fixed wrap frame at the rear of the vehicle.

[0004] There is currently no effective solution to the aforementioned technical problems. Summary of the Invention

[0005] The main objective of this invention is to provide a method for controlling the gap between the rear seats of a car, the vehicle, and the rear seats, so as to solve the problem of excessive gap between the rear seats and the bolster in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, a rear seat for automobiles is provided, comprising: a seat body; a shielding assembly integrated on the inner side of the backrest or the surface of the backrest of the seat body, wherein the shielding assembly has an unfolded state away from the seat body, and an operating state in which the shielding assembly is retracted to different positions relative to the seat body; when the shielding assembly is in the unfolded state or the operating state, there is a certain gap between the seat body and the cover frame, the gap being less than 5 mm.

[0007] Furthermore, the shielding component includes: a curtain, one end of which is connected to the backrest of the seat body, and the other end of which is connected to the frame; an electric mechanism located inside the seat body and connected to the frame, which drives the frame to move along a preset trajectory, thereby causing the curtain to extend and retract synchronously; wherein, when the shielding component is in the unfolded state, the curtain is unfolded to its maximum displacement, and when the shielding component is in the working state, at least part of the curtain is retracted into the inner side of the backrest of the seat body.

[0008] Furthermore, the electric mechanism includes: an electric strut structure, one end of which is connected to the backrest frame of the seat body to form a first connection point a; the other end of which is connected to one end of the frame to form a second connection point b; and the other end of the frame is connected to the backrest frame to form a third connection point c; wherein the third connection point c is located below the first connection point a, and the electric strut structure can rotate around the first connection point a and the second connection point b.

[0009] Furthermore, when the shielding component is in working condition, as the seat body tilts backward, the electric support structure retracts synchronously, causing the second connection point b to move toward the first connection point a, so that the frame rotates along an arc trajectory toward the inside of the backrest frame with the third connection point c as the center, thereby pulling the curtain to be stored inside the backrest of the seat body, so that the shielding component smoothly transitions from the unfolded state to the working state.

[0010] Furthermore, the shielding assembly also includes a guide sleeve, one end of which is connected to the backrest frame, and the other end of which is fitted onto the outside of the frame. The frame slides along the axial direction of the guide sleeve, and the other end of the frame is connected to the curtain, forming a fourth connection point d. One end of the electric support rod structure is connected to the backrest frame of the seat body, forming a first connection a, and the other end of the electric support rod structure is connected to one end of the frame, forming a second connection point b. The frame is connected to the backrest frame through the guide sleeve.

[0011] Furthermore, the shielding assembly includes: a rotating mechanism, one end of which is connected to the backrest frame, and the other end of which is connected to one end of the frame to form a connection point f. The other end of the frame is connected to the curtain. The extension line of the frame forms a first angle with the backrest frame. The rotating mechanism is used to drive the frame to move, thereby causing the curtain to switch between an unfolded state and a working state.

[0012] Furthermore, the shielding assembly also includes: a rotating frame, one end of which is connected to a rotating mechanism to form a first connection point a, the rotating mechanism being connected to a backrest frame, and the other end of the rotating frame being provided with a guide sleeve; an electric support rod structure, one end of which is connected to the rotating frame, and the other end of which is connected to the frame to form a second connection point b; the other end of the frame being connected to the shielding curtain to form a fourth connection point d, and the end of the frame connected to the electric support rod structure passing through the guide sleeve.

[0013] According to another aspect of the present invention, a vehicle is provided having a rear seat, which is the rear seat described above.

[0014] According to another aspect of the present invention, a method for controlling the gap between rear seats of an automobile is provided. The control method controls the rear seats of the automobile as described above. The control method includes: acquiring target occupant information of the target seat; adjusting the target seat to a preset angle when it is determined that no target occupant is sitting in the target seat, wherein the preset angle includes a minimum angle and a maximum angle; controlling the shielding assembly to be in a fully retracted state, and calibrating the position information of the curtain in the fully retracted state; controlling the target seat to be adjusted to the maximum angle, and controlling the curtain to gradually unfold; controlling the curtain to stop working when it is determined that the curtain is in contact with the wrap frame; controlling the curtain to gradually retract until there is a safe gap between the curtain and the wrap frame, recording the backrest angle and the position information of the curtain at this time as the first calibration reference point, wherein the safe gap is less than 5 mm; controlling the backrest angle of the target seat to gradually decrease, and ensuring that there is a safe gap between the curtain and the wrap frame, generating multiple data points, and fitting a continuous mapping curve based on the multiple data points.

[0015] Furthermore, the control method also includes: when it is determined that a target occupant is sitting in the target seat, obtaining the backrest angle of the current target seat; based on the backrest angle, controlling the curtain to smoothly unfold or retract along a preset arc trajectory, so that there is a safe gap between the curtain and the parcel holder.

[0016] The technical solution of this invention utilizes a seat body and a shielding component integrated into the inner side or surface of the seat back. This shielding component can switch between two states: an unfolded state away from the seat body, and a working state retracted to different positions relative to the seat body. When the shielding component is in the unfolded state or any working state, a gap of less than 5mm is maintained between the seat body and the rear side bolster. Through the synergistic effect of the shielding component in the unfolded state or multiple retracted positions, the gap between the seat back and the rear bolster is always controlled within 5mm during adjustment. This effectively conceals the gap between the seat and the bolster without increasing the seat's forward / backward movement or reserving a large fixed gap, improving the overall interior design, eliminating safety hazards, and enhancing the passenger experience. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A schematic diagram of a first embodiment of a car rear seat according to the present invention is shown;

[0019] Figure 2 A structural schematic diagram of an embodiment of a prior art automobile rear seat is shown;

[0020] Figure 3 A schematic diagram of an embodiment of the shielding component according to the present invention is shown;

[0021] Figure 4 A schematic diagram of a second embodiment of a car rear seat according to the present invention is shown;

[0022] Figure 5 A schematic diagram of the structure of a first embodiment of the electric mechanism according to the present invention is shown;

[0023] Figure 6 A schematic diagram of the structure of a second embodiment of the electric mechanism according to the present invention is shown;

[0024] Figure 7 A schematic diagram of the structure of a third embodiment of the electric mechanism according to the present invention is shown;

[0025] Figure 8 A schematic diagram of the structure of a fourth embodiment of the electric mechanism according to the present invention is shown;

[0026] Figure 9 A schematic diagram of the structure of a fifth embodiment of the electric mechanism according to the present invention is shown;

[0027] Figure 10 A schematic diagram of the structure of a sixth embodiment of the electric mechanism according to the present invention is shown;

[0028] Figure 11 A schematic diagram of the structure of a seventh embodiment of the electric mechanism according to the present invention is shown;

[0029] Figure 12 A schematic diagram of the structure of an eighth embodiment of the electric mechanism according to the present invention is shown;

[0030] Figure 13 A flowchart illustrating an embodiment of the method for controlling the gap between rear seats in a car according to the present invention is shown.

[0031] The above figures include the following reference numerals:

[0032] 1. Seat body; 11. Backrest frame; 12. Rotating frame;

[0033] 2. Parcel rack;

[0034] 3. Shielding components; 31. Curtain; 32. Frame; 33. Electric mechanism; 34. Guide sleeve. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0038] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0039] Currently, there are only two technical solutions in the industry, both of which have inherent flaws that cannot be overcome. The technical solutions are as follows:

[0040] 1. Solution for moving the entire seat forward to avoid collision

[0041] Technical means: The second-row seats are designed to slide forward and backward. When the backrest is adjusted to a large angle, the seats actively move forward to make room for rotation.

[0042] Technical defects: 1. Extremely low space utilization: After moving forward, the legroom of the second row is reduced by ≥30%, resulting in insufficient legroom for front passengers and making it impossible to achieve comfortable seating for both front and rear passengers at the same time;

[0043] 2. Complex adjustment logic: It requires simultaneous execution of "seat forward movement + backrest recline", which results in high user operation costs and cannot meet the needs of multiple scenarios with a fixed wheelbase;

[0044] 3. High structural cost: It requires the addition of a complex sliding rail locking and stroke linkage mechanism, which increases the overall vehicle manufacturing cost.

[0045] 2. Fixed structure scheme with reserved gaps

[0046] Technical means: During the design phase, a safety gap of ≥20mm is reserved between the seat back and the wrap frame, and the backrest can be adjusted by rotating directly using this gap.

[0047] Technical defects: 1. Lack of aesthetics: Under normal sitting posture, the gaps are visible to the naked eye, which destroys the integrity of the overall interior design and reduces the overall quality of the vehicle;

[0048] 2. Significant safety hazards: Small items can easily fall into the gaps, and there is a risk that children's hands may get caught.

[0049] 3. Limited structural function: The lack of dynamic shielding design makes it impossible to resolve the core contradiction between "gap" and "zero adhesion".

[0050] Common defects and technological gaps in existing technologies: 1. Lack of adaptive linkage mechanism: The blocking structure and the backrest adjustment are independent of each other, and cannot achieve synchronous action, nor can they dynamically compensate for gap changes;

[0051] 2. No full-condition zero-adhesion control: It can only achieve single-state (such as storage / expansion) obstruction, and cannot maintain a gap of ≤5mm with the package rack under normal sitting posture, semi-reclining, zero-gravity full-condition.

[0052] 3. Low structural integration: Most of the shielding structures are externally designed, which takes up extra space, disrupts the streamlined shape of the seat back, and does not have multi-vehicle compatibility.

[0053] Therefore, the industry urgently needs an adaptive gap-blocking technology solution that can balance space utilization, interior aesthetics, and passenger safety.

[0054] Combination Figures 1 to 12 As shown, according to a specific embodiment of this application, a rear seat for automobiles is provided.

[0055] Specifically, the rear seat of the car includes: a seat body 1; a shielding component 3, which is integrated into the inner side of the backrest or the surface of the backrest of the seat body 1. The shielding component 3 has an unfolded state away from the seat body 1 and an operating state in which it is retracted to different positions relative to the seat body 1. When the shielding component 3 is in the unfolded state or the operating state, there is a certain gap between the seat body 1 and the wrap frame 2, and the gap range is less than 5mm.

[0056] The seat body 1 serves as the basic load-bearing structure for the rear seats of a car, and it includes a backrest. This backrest not only supports the occupant's back but also serves as the mounting platform for the partition assembly 3. Specifically, the backrest has multi-angle adjustment capabilities, allowing it to rotate over a wide range from a normal sitting posture to a zero-gravity / semi-reclining mode. The inner surface or exposed surface of the backrest constitutes the integrated base surface of the partition assembly 3. When the backrest is at different tilt angles, its spatial position relative to the fixed components on the rear of the vehicle changes accordingly, thus creating a dynamically changing spatial gap between the backrest and the bolster frame 2. The structural design of the seat body 1 must reserve sufficient internal space or surface flatness to accommodate the movement of the partition assembly 3 between its extended and retracted states, ensuring smooth backrest adjustment without mechanical interference.

[0057] The shielding component 3 is integrated into the inner side or surface of the seat back of the seat body 1, achieving integrated structural design and avoiding the disruption of interior aesthetics to external components. This component has two main spatial states: First, the unfolded state: In this state, the shielding component 3 extends backward from the seat body 1, forming a continuous shielding barrier on its outer surface. This state typically corresponds to situations where the seat back is adjusted to a large angle, such as a semi-reclined or zero-gravity mode. At this time, the shielding component 3 fills the maximum gap between the seat back and the wrap-around frame 2 when the seat back is rotated to its extreme position. Second, the working state with retracted positions: In this state, the shielding component 3 retracts inward relative to the seat body 1, and the degree of retraction can be adjusted to multiple intermediate positions according to the actual tilt angle of the seat back. This means that the shielding component 3 does not simply switch between the two extreme states of "fully open" and "fully retracted," but can adjust its extension length or coverage area in real time according to the continuous change in the seat back angle. In the unfolded state or any working state, the shielding component 3 is located close to or very close to the seat back and the wrap-around frame 2.

[0058] The wrap rack 2 is a fixed structure installed at the rear of the vehicle, typically located behind the second-row seats, used to carry items or cover interior trim. Since the wrap rack 2 is fixed in position longitudinally, while the rear end of the seat backrest 1 moves along an arc during adjustment, a gap inevitably forms between the rear end of the backrest and the front surface of the wrap rack 2 when the backrest angle changes. This gap increases with the increase in backrest angle. The inner surface of the wrap rack 2 serves as the contact reference surface for the covering component 3 in its unfolded state; its flatness and positional accuracy directly affect the effectiveness of the covering.

[0059] The technical solution of this invention utilizes a seat body and a shielding component integrated into the inner side or surface of the seat back. This shielding component can switch between two states: an unfolded state away from the seat body, and a working state retracted to different positions relative to the seat body. When the shielding component is in the unfolded state or any working state, a gap of less than 5mm is maintained between the seat body and the rear side bolster. Through the synergistic effect of the shielding component in the unfolded state or multiple retracted positions, the gap between the seat back and the rear bolster is always controlled within 5mm during adjustment. This effectively conceals the gap between the seat and the bolster without increasing the seat's forward / backward movement or reserving a large fixed gap, improving the overall interior design, eliminating safety hazards, and enhancing the passenger experience.

[0060] Figure 1 The relationship between the seat body 1 and the wrap frame 2 in a semi-reclining or zero-gravity state: At this time, the seat body 1 and the wrap frame 2 are close to zero contact (less than 5mm).

[0061] Figure 2 When the existing seat does not have a shielding component 3, the relationship between the seat body 1 and the wrap-around frame 2 in a normal sitting posture is as follows: the gap between the seat body 1 and the wrap-around frame 2 is relatively large.

[0062] Figure 4 When the seat is equipped with a cover component 3, the relationship between the seat (including the cover component 3) and the wrap-around frame 2 in a normal sitting posture is as follows: the seat (including the cover component 3) and the wrap-around frame 2 are close to zero contact (less than 5mm). The cover component 3 is fixed to the seat back, and it extends out of the seat back when in use and retracts into the seat back or is close to the seat back when not in use.

[0063] Furthermore, such as Figure 3 As shown, the shielding assembly 3 includes: a curtain 31, one end of which is connected to the backrest of the seat body 1, and the other end of which is connected to the frame 32; an electric mechanism 33, which is located inside the seat body 1 and connected to the frame 32. The electric mechanism 33 drives the frame 32 to move along a preset trajectory, thereby causing the curtain 31 to extend and retract synchronously. When the shielding assembly 3 is in the unfolded state, the curtain 31 is unfolded to its maximum displacement. When the shielding assembly 3 is in the working state, at least part of the curtain 31 is retracted into the inner side of the backrest of the seat body 1.

[0064] The curtain 31 is a flexible or semi-flexible component in the blocking assembly 3 that directly faces the wrap frame 2 and performs the blocking function. Its material is preferably a soft material such as fabric or genuine leather, possessing good flexibility and foldable / rollable characteristics. One end of the curtain 31 is fixedly connected to the backrest frame or surface of the seat body 1, serving as a fixed fulcrum or reference point for movement; the other end is connected to the frame 32, serving as a follower end. Structurally, the curtain 31 is not a rigid flat plate, but rather a medium that can deform to adapt to the movement trajectory of the frame 32. When the frame 32 extends outward, the curtain 31 unfolds and flattens accordingly, forming a continuous blocking surface; when the frame 32 retracts inward, the curtain 31 compresses its volume through folding, rolling, or pleating, thus being stored within the backrest's internal space. This flexible connection method ensures that the curtain 31 does not generate rigid interference during extension and retraction, and can closely conform to the backrest contour.

[0065] The frame 32 is a rigid or semi-rigid support structure that supports the curtain 31 and maintains its unfolded shape. It is typically rod-shaped, L-shaped, or arc-shaped, possessing sufficient structural strength to maintain the flatness and tension of the curtain 31 in its unfolded state. The frame 32 serves as the transmission medium between the curtain 31 and the electric mechanism 33, and its movement directly determines the spatial position of the curtain 31. One end of the frame 32 is connected to the free end of the curtain 31, and the other end is connected to the output end of the electric mechanism 33. During movement, the frame 32 moves along a preset trajectory, which typically includes axial extension and possible rotational oscillation to adapt to geometric requirements when the backrest angle changes. The design of the frame 32 must consider volume optimization to ensure that it can smoothly enter the internal storage space of the backrest in its fully retracted state, without protruding from the outer surface of the backrest, achieving an "invisible" effect.

[0066] The electric mechanism 33 is the power source that drives the curtain assembly 3. It is integrated into the internal structure of the seat body 1 to protect mechanical components and optimize appearance. The electric mechanism 33 is directly connected to the frame 32 and drives the frame 32 to move along a preset trajectory by outputting power such as linear thrust, rotational torque, or compound motion. The electric mechanism 33 includes, but is not limited to, single or combined forms such as hinges, motors, gears, ball screws, multi-link structures, and electric struts. Its working principle is to receive control signals and precisely control the displacement or angle of the output end, thereby smoothly transitioning the frame 32 and the curtain 31 from a fully retracted state to a fully extended state, or vice versa. The electric mechanism 33 is located inside the seat, avoiding exposed external wiring, improving the cleanliness and safety of the interior, and achieving a high degree of structural integration by utilizing the internal space of the seat.

[0067] Through the coordinated operation of the curtain 31, frame 32, and electric mechanism 33, this application achieves the following significant technical effects: First, it achieves continuous adjustability and precise control of the obstruction state. The electric mechanism 33 drives the frame 32 to move along a preset trajectory, so that the unfolded length of the curtain 31 is not limited to only two discrete states of "open" and "closed," but can be adjusted in real time and continuously according to the actual adjustment angle of the seat back. In a normal sitting posture, the curtain 31 is at least partially retracted inside the backrest, maintaining the simplicity and streamlined appearance of the seat; in zero gravity or semi-reclining mode, the curtain 31 unfolds to its maximum displacement, completely covering the gap between the backrest and the wrap frame 2. This continuous adjustment capability ensures that the curtain 31 can effectively fill the gap at any intermediate angle, achieving a tight fit with a gap ≤5mm.

[0068] Secondly, it improves structural integration and space utilization. The electric mechanism 33 is integrated inside the seat body 1, and the frame 32 and curtain 31 have a compact structural design, enabling the entire shielding assembly 3 to achieve a large-range extension function without occupying extra seating space. The flexible storage characteristics of the curtain 31 allow it to be folded or rolled up, making its footprint extremely small when not in use. This eliminates the abruptness and space waste caused by traditional external shielding panels, perfectly meeting the modern automotive interior design requirements of "invisibility" and "simplicity".

[0069] Finally, the smoothness and reliability of the movement process are ensured. The frame 32, acting as a rigid support, ensures that the curtain 31 remains taut when unfolded, preventing shading failure or abnormal noise due to loosening or sagging. The precise drive of the electric mechanism 33 ensures that the curtain 31 operates without jamming or impact during extension and retraction, achieving a quiet and smooth operating experience. Simultaneously, placing the drive components inside the seat, protected by the seat structure, extends their service life and reduces maintenance costs.

[0070] Furthermore, such as Figure 5 As shown, the electric mechanism 33 includes: an electric support rod structure, one end of which is connected to the backrest frame 11 of the seat body 1 to form a first connection point a; the other end of which is connected to one end of the frame 32 to form a second connection point b; and the other end of the frame 32 is connected to the backrest frame 11 to form a third connection point c; wherein the third connection point c is located below the first connection point a, and the electric support rod structure can rotate around the first connection point a and the second connection point b.

[0071] Furthermore, such as Figure 6As shown, when the shielding component 3 is in working state, when the seat body 1 tilts backward, the electric support structure retracts synchronously, causing the second connection point b to move toward the first connection point a, so that the frame 32 rotates along an arc trajectory toward the inside of the backrest frame 11 with the third connection point c as the center, thereby pulling the curtain 31 to be stored inside the backrest of the seat body 1, so that the shielding component 3 smoothly transitions from the unfolded state to the working state.

[0072] The electric strut structure is the core actuator driving the shielding assembly. It is telescopic, allowing its length to change according to control commands. Structurally, it functions as an electromechanical actuator capable of generating linear thrust or tension. Rotary connection interfaces at both ends allow it to adapt to changes in angle between mounting points, preventing jamming or stress concentration caused by rigid constraints.

[0073] The first connection point a is the hinge point between the electric strut structure and the backrest frame 11 of the seat body 1. This connection point is fixed to the backrest frame 11 and serves as a rotation fulcrum for the electric strut structure. During the adjustment of the seat backrest angle, since the backrest frame 11 may rotate with the backrest as a whole (depending on the specific installation method, but usually the backrest frame moves with the backrest or serves as a relatively stationary base), the position of the first connection point a changes with the movement of the backrest frame 11.

[0074] The second connection point b is the hinge point between the electric strut structure and the frame 32. This connection point is located at one end of the frame 32, allowing the electric strut structure to directly apply driving force or resistance to the frame 32. As the electric strut extends or retracts, the distance between the second connection point b and the first connection point a changes, thereby driving the frame 32 to move.

[0075] The frame 32 serves as a structural component supporting the curtain 31. One end of the frame is connected to the electric support rod via the second connection point b, and the other end is hinged to the backrest frame 11 via the third connection point c. The frame 32 forms a rigid or semi-rigid link between the two hinge points. Its length is fixed, but its posture in space can change with the relative movement of the two connection points.

[0076] The third connection point c is another hinge point between the frame 32 and the backrest frame 11, and also a fixed fulcrum for the rotational movement of the frame 32. The third connection point c is located below the first connection point a. This vertical positional relationship is crucial, as it defines the geometric basis of the triangular or quadrilateral kinematic chain formed by the frame 32, the electric strut, and the backrest frame 11. The third connection point c is fixed to the backrest frame 11 and moves with the backrest frame 11 (or serves as a fixed reference relative to the seat, depending on the specific embodiment, but the key is that point c is the rotation center of the frame 32).

[0077] The first connection point a, the second connection point b, and the third connection point c together form a kinematic closed loop. Points a and c are both located on the backrest frame 11, and point b is located on the frame 32. An electric strut connects points a and b, the frame 32 connects points b and c, and the backrest frame 11 provides support between points a and c. Since point c is below point a, and the electric strut can rotate around a and b, this constitutes a typical crank-rocker or double-rocker mechanism variant, allowing the frame 32 to swing around point c by changing the length of the electric strut.

[0078] When the seat back is in a normal sitting position (at a small angle, such as 90°-115°), such as Figure 5 As shown, the controller controls the electric support rod structure to be in an extended state. At this time, the electric support rod extends from the first connection point a to the second connection point b, with a relatively long length. Due to the pushing or pulling force of the electric support rod, the frame 32 is pushed away from the backrest frame 11, causing the frame 32 to swing outward around the third connection point c. This action causes the curtain 31 connected to the other end of the frame 32 to unfold, moving it away from the seat body 1 and extending behind the backrest to fill the gap between the backrest and the wrap frame, keeping the gap less than 5mm.

[0079] Zero gravity or semi-reclining mode (large angle), such as Figure 6 As shown, when the user triggers the seat adjustment, causing the backrest to recline to a large angle (e.g., above 165°), the seat back rotates relative to the seat cushion. Simultaneously, the controller synchronously shortens the electric support rod structure. The electric support rod gradually shortens from its extended state, with the second connection point b moving closer to the first connection point a. Due to the shortening of the electric support rod, the force applied to the frame 32 changes, forcing the frame 32 to rotate (i.e., swing inward) around the third connection point c towards the backrest frame 11. Dynamic compensation: As the backrest angle increases, the distance between the rear end of the backrest and the wrap-around frame naturally decreases. The synchronous shortening of the electric support rod causes the frame 32 and the curtain 31 to retract inward synchronously. This retraction is not static but is matched in real-time with the change in the backrest angle.

[0080] When the backrest stops moving, the electric support rod also stops extending and retracting. At this time, the frame 32 is in the retracted position, and the curtain 31 is retracted to a position close to the inside of the backrest. As the backrest angle increases, the backrest itself is closer to the wrap frame, and the retracted curtain 31 just fills the remaining small gap, ensuring that the final gap is still less than 5mm and there is no abruptness.

[0081] Throughout the adjustment process, the mechanism consisting of the electric support rod, frame 32, and backrest frame 11 remains in a state of motion equilibrium. The extension and retraction of the electric support rod, the swing angle of the frame 32, and the adjustment angle of the backrest are functionally related. Since the third connection point c is located below the first connection point a, this geometric layout ensures that the extension and retraction of the electric support rod can be effectively converted into the rotational motion of the frame 32 around point c, and the motion trajectory is smooth, avoiding dead points or interference.

[0082] Through the linkage mechanism formed by the electric support rod structure, the frame 32, and the backrest frame 11, this application can automatically adjust the extension length of the shielding component according to changes in the backrest angle. When the backrest angle increases and the gap decreases, the shielding component automatically retracts; when the backrest angle decreases and the gap increases, the shielding component automatically extends. This "follow-up" mechanism ensures that the gap between the shielding curtain and the wrap frame is always controlled within 5mm, regardless of the seat angle, solving the problem that traditional fixed-gap solutions cannot accommodate all working conditions.

[0083] This linkage mechanism achieves automated adjustment through synchronous control (or mechanical linkage) of the electric support rod and the backrest motor. Users only need to adjust the backrest angle, and the blinds will automatically adapt, eliminating the need for manual operation of the blinds and enhancing the convenience and intelligent experience of use.

[0084] Furthermore, the shielding assembly 3 also includes a guide sleeve 34, one end of which is connected to the backrest frame 11, and the other end of which is fitted onto the outside of the frame 32. The frame 32 is slidably arranged along the axial direction of the guide sleeve 34, and the other end of the frame 32 is connected to the curtain 31 to form a fourth connection point d. One end of the electric support rod structure is connected to the backrest frame 11 of the seat body 1 to form a first connection a, and the other end of the electric support rod structure is connected to one end of the frame 32 to form a second connection point b. The frame 32 is connected to the backrest frame 11 through the guide sleeve 34.

[0085] The guide sleeve 34 is a guide component fixed to the backrest frame 11 of the seat body 1, typically in the form of a cylindrical or tubular structure. It has a smooth inner hole to guide the movement of the frame 32. One end of the guide sleeve 34 is rigidly connected or fixed to the backrest frame 11, ensuring its position remains relatively stable relative to the backrest frame. The other end of the guide sleeve 34 is open and fitted over the outside of the frame 32, providing constraint and support for the axial sliding of the frame 32. The presence of the guide sleeve 34 restricts the displacement of the frame 32 in the direction perpendicular to its axis, allowing it to slide linearly only along the axial direction of the guide sleeve. The frame 32, as the core component supporting the curtain 31 and transmitting driving force, is, in this embodiment, a rod-shaped or frame-shaped structure that can slide axially. The frame 32 passes through the guide sleeve 34, with part of it located inside the guide sleeve and part outside. Figure 7As shown, the portion of the frame 32 that passes through the guide sleeve 34 is at point e in the figure. One end of the frame 32 is connected to the electric strut structure via the second connection point b, receiving the driving force. The other end of the frame 32 is connected to the curtain 31, forming the fourth connection point d, which is used to pull the curtain 31 to extend and retract. The frame 32 can slide freely along its axial direction within the guide sleeve 34; this sliding is one of the main forms of movement for the expansion and contraction of the blind assembly 3. The fourth connection point d is the connection point between the frame 32 and the curtain 31, located at the end or farthest point of the frame 32 away from the guide sleeve 34. When the frame 32 moves axially along the guide sleeve 34, the fourth connection point d moves synchronously, thereby causing the curtain 31 to extend and retract axially as a whole.

[0086] One end of the electric strut structure is connected to the backrest frame 11 via a first connection point a, and the other end is connected to the other end of the frame 32 via a second connection point b. The electric strut changes the distance between the first connection point a and the second connection point b by extending and retracting, thereby driving the frame 32 to slide within the guide sleeve 34. In this embodiment, the frame 32 is indirectly connected to the backrest frame 11 via the guide sleeve 34. Specifically, the frame 32 is constrained by the guide sleeve 34 and can only slide linearly relative to the backrest frame 11 along the axial direction of the guide sleeve. The electric strut structure spans between the backrest frame 11 and the frame 32, driving the frame 32 to reciprocate within the guide sleeve through a pushing and pulling action.

[0087] The working principle of the above scheme is as follows:

[0088] like Figure 7 As shown, in the normal sitting posture (unfolded state), when the seat back is in a normal sitting posture (at a small angle, such as 90°-115°), the gap between the rear end of the backrest and the wrap-around frame 2 is relatively large. The controller controls the extension of the electric support rod structure, pushing the second connection point b away from the first connection point a. Since the frame 32 is constrained by the guide sleeve 34, the thrust of the electric support rod is converted into the frame 32 sliding outward along the axial direction of the guide sleeve 34 away from the inside of the backrest. The outward sliding of the frame 32 causes the fourth connection point d to move outward, thereby pulling the curtain 31 to unfold from the inside of the backrest, extending to the back of the backrest, filling the large gap between the backrest and the wrap-around frame 2, and keeping the gap less than 5mm.

[0089] like Figure 8As shown, in zero-gravity or semi-reclining mode, the backrest reclines to a large angle (e.g., 165° or more), causing the rear end to move closer to the wrap-around frame 2, naturally reducing the gap. The controller controls the retraction of the electric support rod structure, pulling the second connection point b closer to the first connection point a. The tension of the electric support rod is transmitted to the frame 32 through the second connection point b, forcing the frame 32 to slide inward along the guide sleeve 34 towards the inside of the backrest. The inward sliding of the frame 32 causes the fourth connection point d to move inward, pulling the curtain 31 to retract into the backrest. During this process, the sliding amount of the frame 32 matches the change in the backrest angle. As the backrest angle increases, the frame 32 gradually retracts into the guide sleeve 34, and the curtain 31 folds or rolls up accordingly, eventually being stored inside the backrest. Since the backrest is close to the wrap-around frame, the retracted curtain 31 precisely fills the remaining minimum gap, ensuring that the gap is always less than 5mm.

[0090] Throughout the adjustment process, the sliding of the frame 32 within the guide sleeve 34 ensures the straightness and stability of the curtain 31's extension and retraction. The guide sleeve 34 eliminates the lateral swaying of the frame 32 during movement, ensuring that the curtain 31 unfolds smoothly or folds neatly, avoiding uneven gaps or mechanical noises caused by shaking.

[0091] By introducing a guide sleeve 34 to guide and constrain the frame 32, this application achieves linear telescopic movement of the shielding component 3. Compared to a pure rotation mechanism, linear sliding has higher rigidity and stability, effectively resisting external vibrations or loads, ensuring that the curtain 31 remains flat, without twisting or jamming, during unfolding and retraction. The presence of the guide sleeve significantly improves the motion accuracy of the mechanism, making gap control more uniform and stable. The frame 32 can slide completely or mostly into the guide sleeve 34, resulting in minimal space occupation by the shielding component 3 when not in operation. This design allows the curtain 31 to be completely hidden inside the seat back, achieving a true "invisible" effect without compromising the overall interior design, thus enhancing the aesthetics and quality of the vehicle. The electric strut directly drives the frame to slide axially, resulting in a short structural path and high transmission efficiency. This linear drive method has a fast response speed and can quickly adapt to changes in the backrest angle. At the same time, since the motion trajectory is restricted by the guide sleeve, there is no need for complex anti-deflection or guiding mechanisms, reducing manufacturing costs and assembly difficulty. The linear extension and retraction of the frame 32, coordinated with changes in the backrest angle, dynamically compensates for changes in the gap between the backrest and the wrap rack. Whether in a normal sitting posture or zero-gravity mode, the curtain 31 fits snugly against the wrap rack, strictly controlling the gap to within 5mm. This not only eliminates the risk of items falling but also avoids the risk of children's fingers getting caught, improving passenger safety. The guide sleeve 34 provides excellent support and guidance for the frame 32, reducing friction and wear between moving parts. Furthermore, compared to complex rotary linkage mechanisms, linear motion results in more even force distribution and less stress concentration, thereby extending the service life of the entire curtain assembly 3 and reducing later maintenance costs.

[0092] In summary, this embodiment constructs a stable, reliable, and compact linear telescopic gap-blocking mechanism through the sliding cooperation between the guide sleeve 34 and the frame 32, effectively solving the problem of gap blocking under large-angle adjustment of the rear seats, and combining aesthetics, safety, and practicality.

[0093] Furthermore, the shielding component 3 includes: a rotating mechanism, one end of which is connected to the backrest frame 11, and the other end of which is connected to one end of the frame 32 to form a connection point f. The other end of the frame 32 is connected to the curtain 31. The extension line of the frame 32 forms a first angle with the backrest frame 11. The rotating mechanism is used to drive the frame 32 to move, thereby causing the curtain 31 to switch between an unfolded state and a working state.

[0094] The rotating mechanism is the core power source driving the movement of the sunshade assembly 3, and its function is to convert electrical energy into rotational torque. One end of the mechanism is fixedly installed on the backrest frame 11 of the seat body 1, serving as a fixed fulcrum or base for rotational movement. The other end of the rotating mechanism is connected to one end of the frame 32, forming a connection point f. By outputting rotational motion, the rotating mechanism can directly drive the frame 32 to swing around the connection point f. The rotating mechanism includes, but is not limited to, a sunshade motor, ball screw, worm gear, etc., where the motor, in conjunction with a reduction mechanism such as a worm gear, can provide a high-torque, self-locking rotational output, ensuring that the mechanism can maintain a stable position when stationary.

[0095] The frame 32 is a rigid connecting rod that supports the curtain 31 and transmits rotational motion. One end of it is connected to the rotating mechanism via connection point f, and the other end is connected to the curtain 31. Driven by the rotating mechanism, the frame 32 can change its angle in space around connection point f. The length and structural strength of the frame 32 are sufficient to support the weight and tension of the curtain 31 in its unfolded state, preventing it from sagging or deforming.

[0096] The curtain 31 is connected to the far end of the frame 32, i.e., the end furthest from the connection point f, and moves with the swinging of the frame 32. The curtain 31 is made of a flexible material such as fabric or genuine leather, which can adapt to the movement trajectory of the frame 32. It can be stored by folding or rolling, or kept flat by stretching to provide privacy. The connection point f is the hinge point or drive connection point between the rotating mechanism and the frame 32, located near the backrest frame 11. The extension line of the frame 32, i.e., the long axis direction of the frame, forms a first angle with a specific reference surface of the backrest frame 11, such as the outer or inner surface of the backrest.

[0097] When the first included angle is large, the frame 32 is far away from the backrest frame 11, and the curtain 31 is in the unfolded state, covering the large gap between the backrest and the wrap frame 2.

[0098] When the first included angle is small, even close to 0 degrees or a negative value, depending on the defined reference, the frame 32 is close to or fits against the backrest frame 11, and the curtain 31 is in the working and retracted state, hidden within the backrest contour. In this embodiment, the rotating mechanism directly drives the frame 32 to rotate around the connection point f. There is no sliding fit such as a guide sleeve between the frame 32 and the backrest frame 11; instead, it is a purely rotary joint connection. The curtain 31 is attached to the end of the frame 32 and swings with the frame as a whole.

[0099] The working principle of the above scheme is as follows:

[0100] like Figure 9As shown, in the normal sitting posture with the backrest extended: when the seat back is at a relatively small angle in the normal sitting posture, such as 90°-115°, the gap between the rear end of the backrest and the wrap-around frame 2 is relatively large. The rotating mechanism drives the frame 32 to rotate outward around the connection point f. The first angle between the extension line of the frame 32 and the backrest frame 11 increases. As the first angle increases, the frame 32 causes the curtain 31 to swing and unfold away from the backrest frame 11. The curtain 31 is pulled flat, extending behind the backrest, filling the large gap between the backrest and the wrap-around frame 2, keeping the gap less than 5mm.

[0101] like Figure 10 As shown, in zero-gravity or semi-reclining mode, when the user triggers seat adjustment and the backrest reclines to a large angle such as 165° or more, the rear end of the backrest moves closer to the wrap frame 2, naturally reducing the gap. The rotating mechanism drives the frame 32 to rotate inward around the connection point f. The first angle between the extension line of the frame 32 and the backrest frame 11 decreases. As the first angle decreases, the frame 32 causes the curtain 31 to swing and retract towards the inside of the backrest frame 11. The curtain 31 then folds or rolls up, gradually being stored inside the backrest or close to the backrest surface.

[0102] The rotation angle of the rotating mechanism matches the change in the backrest angle. As the backrest angle increases, the first included angle gradually decreases, and the curtain 31 gradually hides. Finally, when the backrest stops at the target large angle position, the first included angle is at its minimum value, and the curtain 31 is fully or mostly retracted, just filling the remaining minimum gap between the backrest and the wrap rack 2, ensuring that the gap is always less than 5mm.

[0103] Throughout the adjustment process, the rotating mechanism achieves continuous changes in the angle of the frame 32 by precisely controlling the rotation angle. The continuous change of the first included angle allows the curtain 31 to smoothly transition from the unfolded state to the working state without abrupt changes or jamming. Since the rotating mechanism typically has a self-locking function, such as a worm gear, the frame 32 can stably maintain the current angle after stopping the operation, without the need for an additional locking device.

[0104] The frame 32 is driven to rotate around the connection point f by a rotating mechanism, and the movement trajectory of the shielding component 3 is arc-shaped. This rotational movement allows the curtain 31 to naturally conform to the curved shape of the backrest during unfolding and retraction. Especially in the retracted state, the frame 32 can closely fit the backrest frame 11 with the first included angle close to zero, achieving a true "invisible" effect without compromising the overall lines and aesthetics of the interior.

[0105] The rotating mechanism is directly integrated into the backrest frame 11, with a short drive path and no need for complex linkage or guide rail systems. The integrated design of the frame 32 and the rotating mechanism makes the entire shielding component 3 compact and space-saving, which is beneficial for layout in the limited internal space of the seat back and improves the flexibility of seat design.

[0106] The rotating mechanism directly drives the frame 32, resulting in high transmission efficiency and low energy loss. Compared to linear drives such as electric struts and guide sleeves, the rotating drive structure is simpler, has fewer parts, and a lower failure rate. Furthermore, the motor-driven rotation has a fast response speed, quickly adapting to changes in the backrest angle and providing a smooth user experience.

[0107] By precisely controlling the size of the first included angle, this application can precisely control the unfolded length and position of the curtain 31. Whether in a normal sitting posture or in zero-gravity mode, the curtain 31 can fit tightly against the bag rack 2, strictly controlling the gap to within 5mm. This not only eliminates the risk of items falling, but also avoids the risk of children's fingers getting caught, thus improving riding safety.

[0108] If the rotating mechanism adopts a self-locking drive method such as a worm gear, the frame 32 can stably maintain the current angle after power failure or when adjustment stops, and will not be displaced due to gravity or external vibration. This ensures the positional stability of the shielding component 3 under various operating conditions, extends its service life, and reduces maintenance costs.

[0109] In summary, this embodiment drives the frame 32 to rotate around the connection point f through a rotating mechanism, and uses the change of the first included angle to realize the unfolding and retraction of the curtain 31, thus constructing a simple, efficient and beautiful rotating gap-blocking mechanism. It effectively solves the problem of gap blocking under large-angle adjustment of the rear seat, and has high integration, high reliability and excellent aesthetic effect.

[0110] Furthermore, the shielding assembly 3 also includes: a rotating frame 12, one end of which is connected to a rotating mechanism to form a first connection point a, the rotating mechanism being connected to a backrest frame 11, and the other end of the rotating frame 12 being provided with a guide sleeve 34; an electric support rod structure, one end of which is connected to the rotating frame 12, and the other end of which is connected to a frame 32 to form a second connection point b; the other end of the frame 32 is connected to the shielding curtain 31 to form a fourth connection point d, and the end of the frame 32 connected to the electric support rod structure passes through the guide sleeve 34.

[0111] The rotating frame 12 is a newly added key intermediate transmission component in this embodiment, located between the backrest frame 11 and the actuator. One end of the rotating frame 12 is connected to the rotating mechanism via a first connection point a. The rotating mechanism itself is fixed to the backrest frame 11, so the rotating frame 12 can rotate relative to the backrest frame 11 around the first connection point a. The rotating frame 12 serves as a support platform, with a guide sleeve 34 at its other end, and one end of the electric strut structure is also connected to the rotating frame 12. Its rotational movement will cause all its auxiliary components—the guide sleeve and the electric strut connection point—to synchronously change their spatial orientation relative to the backrest frame 11.

[0112] A rotating mechanism, such as a motor or worm gear, is fixed to the backrest frame 11, and its output end is connected to the first connection point a of the rotating frame 12. The rotating mechanism drives the rotating frame 12 to rotate around the first connection point a, thereby changing the angle of the rotating frame 12 relative to the backrest frame 11.

[0113] The guide sleeve 34 is fixed to the other end of the rotating frame 12. Since the rotating frame 12 can rotate, the spatial position and angle of the guide sleeve 34 also change accordingly. The guide sleeve 34 is used to guide the frame 32 to slide along its axial direction.

[0114] One end of the electric strut structure is connected to the rotating frame 12. The other end of the electric strut structure is connected to the frame 32, forming a second connection point b. The electric strut changes its length by telescoping, thereby driving the frame 32 to slide within the guide sleeve 34, or further adjusting the position of the frame 32 based on the rotation of the rotating frame.

[0115] One end of the frame 32 passes through the guide sleeve 34 and connects to the second connection point b of the electric strut structure; the other end of the frame 32 connects to the curtain 31, forming the fourth connection point d. The frame 32 slides axially relative to the guide sleeve 34 and then relative to the rotating frame 12. The curtain 31, as mentioned above, is connected to the fourth connection point d of the frame 32 and moves with the sliding of the frame 32 and the rotation of the rotating frame 12.

[0116] The rotating mechanism drives the rotating frame 12 to rotate around the first connection point a. The electric strut structure drives the frame 32 to slide axially along the guide sleeve 34. The frame 32 drives the curtain 31 to perform a combined rotation and sliding motion, realizing the switching of the curtain assembly 3 between the unfolded state and the working state.

[0117] The working principle of the above scheme is as follows:

[0118] like Figure 11 As shown, in the normal sitting posture with the backrest extended: when the seat back is at a relatively small angle in the normal sitting posture, such as 90°-115°, the gap between the rear end of the backrest and the wrap-around frame 2 is relatively large. The rotating mechanism drives the rotating frame 12 to rotate to an angle position where the guide sleeve 34 faces the rear of the seat. For example, the rotating frame 12 is approximately perpendicular to the backrest or extends outward. The electric support rod structure extends, pulling or pushing the frame 32 to slide outward along the axial direction of the guide sleeve 34. The outward sliding of the frame 32 causes the fourth connection point d to move away from the backrest, pulling the curtain 31 to unfold from inside the backrest, extending to the rear of the backrest, filling the large gap between the backrest and the wrap-around frame 2, keeping the gap less than 5mm.

[0119] like Figure 12As shown, in zero-gravity or semi-reclining mode, when the user triggers seat adjustment and the backrest reclines to a large angle such as 165° or more, the rear end of the backrest moves closer to the wrap frame 2, naturally reducing the gap. The rotating mechanism drives the rotating frame 12 to rotate around the first connection point a towards the inside of the backrest or towards the backrest. This action causes the connection points of the guide sleeve 34 and the electric support rod to rotate inward synchronously, making the entire drive mechanism closer to the backrest and reducing space occupation. Simultaneously or in conjunction with the rotation action, the electric support rod structure retracts, pulling the frame 32 to slide inward along the axis of the guide sleeve 34. The inward sliding of the frame 32 causes the fourth connection point d to move towards the inside of the backrest. The rotation of the rotating frame 12 makes the angle of the guide sleeve 34 more conducive to the storage of the curtain 31. The curtain 31 then folds or rolls up, gradually being stored inside the backrest or close to the backrest surface. The rotation of the rotating frame 12 adjusts the spatial posture of the overall mechanism, eliminating the risk of structural interference at large angles; the sliding of the electric support rod precisely controls the extension length of the curtain 31. The synergistic effect of the two ensures that no matter how the backrest angle changes, the curtain 31 always fits tightly against the wrapping frame 2, keeping the gap within 5mm.

[0120] Throughout the adjustment process, the rotation of the rotating frame 12 and the sliding of the frame 32 are coordinated. The rotation of the rotating frame 12 provides a suitable guide angle for the sliding of the frame 32, avoiding jamming or lateral force during linear sliding at large angles. This composite motion mechanism of "rotation + sliding" enables the blocking component 3 to adapt to a wide range of backrest adjustments from 0° to 170°, achieving adaptive blocking under all working conditions.

[0121] By introducing the rotating frame 12, this application solves the structural interference problem that may occur when simply sliding or rotating is used for large-angle adjustments. The rotation of the rotating frame 12 allows the drive mechanism guide sleeve and electric support rod to adjust their posture according to the backrest angle, always maintaining the optimal working position. This two-stage linkage rotation + sliding mechanism ensures that the blocking component 3 can work smoothly in the full angle range of the backrest without jamming or interference.

[0122] Under normal operating conditions at a large angle, the rotating frame 12 rotates to a position that fits the backrest, allowing the entire shielding component 3 to be compactly housed within the backrest contour. This design maximizes the use of the seat's interior space, avoids the waste of space and visual obtrusion caused by external components, and improves the overall interior quality and space utilization of the vehicle.

[0123] Guided by the rotating frame 12, the electric strut structure slides along the guide sleeve 34. The rigid support of the rotating frame 12 ensures the stability and guiding accuracy of the guide sleeve 34. This structure has higher rigidity than purely flexible connections or single-point rotation, effectively resisting external vibrations and loads, ensuring that the blind curtain 31 remains flat and stable during unfolding and retraction, and that the gap control is more precise and uniform.

[0124] The rotating frame 12 transmits the torque of the rotating mechanism to the guide sleeve 34 and the electric strut, resulting in a clear and reasonable force path. The electric strut slides within the guide sleeve, reducing wear and off-center loading. The rotating frame 12 itself, as a rigid component, bears the main structural load, extending the service life of the entire shielding assembly 3. Simultaneously, the self-locking characteristic of the rotating mechanism, similar to a worm gear, ensures the positional stability of the mechanism in a static state.

[0125] In summary, this embodiment utilizes the rotating frame 12, guide sleeve 34, electric strut structure, and frame 32 to construct a highly reliable, adaptable, and compact composite gap-blocking mechanism. This mechanism, through a two-stage linkage of "rotation + sliding," perfectly solves the problem of gap blocking under large-angle rear seat adjustments, balancing aesthetics, safety, space utilization, and durability, demonstrating significant technical advantages and innovation.

[0126] According to another aspect of the present invention, a vehicle is provided having a rear seat, which is the rear seat described above.

[0127] According to another aspect of the invention, such as Figure 13 As shown, a method for controlling the clearance between rear seats in a car is provided. The control method controls the rear seats of the car as described above, and includes:

[0128] Step S10: Obtain the target occupant information for the target seat;

[0129] The system monitors the seating status of the target seat (i.e., the seat the user intends to adjust or self-learn calibration) in real time using built-in pressure sensors, weight sensors, or infrared / radar sensors. It then determines whether a target occupant (including adults or children) is present in the seat.

[0130] Step S11: If it is determined that there is no target occupant sitting in the target seat, adjust the target seat to a preset angle, wherein the preset angle includes: minimum angle and maximum angle;

[0131] If step S10 determines that the seat is empty, the system enters the calibration preparation stage. The system controls the seat body to move to a preset angle position. The preset angles include a "minimum angle" (such as a normal sitting posture, with the backrest nearly vertical) and a "maximum angle" (such as zero gravity or semi-reclining mode, with the backrest nearly horizontal or reclined at a large angle). In this embodiment, the maximum or minimum angle is usually adjusted first as the starting reference point to establish a reference coordinate system for subsequent calibration.

[0132] Optionally, if the seat has a fore-and-aft sliding function, the seat is moved forward to its foremost position, and this position is marked as the seat's front endpoint; then the seat is moved backward to its rearmost position, and this position is marked as the seat's rear endpoint. The seat's front and rear endpoints can be recorded to establish a reference coordinate system for subsequent calibration. If the seat does not have a fore-and-aft sliding function, this process is omitted.

[0133] Adjust the seat to the known extreme position (end point) to ensure that the subsequent calibration process is carried out within the entire range of seat movement, thus ensuring data coverage and integrity.

[0134] Step S12: Control the shielding component to be in a fully retracted state, and calibrate the position information of the curtain in the fully retracted state;

[0135] The control mechanism (such as an electric strut, rotary motor, etc.) drives the curtain assembly (including the frame and curtain) to its fully retracted position, which represents its mechanical limit. At this point, the curtain is completely retracted into the seat back or flush against the backrest surface. The controller identifies this limit position (i.e., the "curtain front stop" or "zero position") via Hall effect sensors, encoders, or motor current / speed feedback. This step aims to find the critical point at which the curtain makes physical contact with the folding frame during retraction.

[0136] Step S13: Adjust the target seat to its maximum angle and gradually unfold the curtain;

[0137] Step S14: Once it is confirmed that the curtain is in contact with the parcel rack, control the curtain to stop working;

[0138] During the curtain's deployment, the system monitors the relationship between the curtain and the rear side cladding frame in real time. If slight contact is detected (which can be determined through sudden changes in motor current, stall detection, torque sensors, or dedicated contact sensors), the system immediately stops the curtain's deployment. The point of contact represents the farthest physical boundary the curtain can reach at the current seat angle. Forcing deployment beyond this point could damage the mechanical structure or generate excessive noise.

[0139] Step S15: Control the curtain to gradually retract until there is a safe gap between the curtain and the package rack. Record the backrest angle and the position information of the curtain at this time as the first calibration reference point. The safe gap is less than 5mm.

[0140] Starting from the contact point, the system controls the curtain assembly to gradually retract (store). As the curtain retracts, a new gap is created between it and the parcel holder. The system continuously monitors this gap until it reaches a preset "safe gap" (this safe gap is less than 5mm, for example, 2-3mm). At this point, the system records the current backrest angle (x0) and the curtain's position information (such as motor steps, electric support rod length, etc.). This set of data (angle, position) is marked as the first calibration reference point.

[0141] The contact point is the "boundary" point, while the safety clearance point is the "safe" point. The difference between the two is the system's safety margin. By retracting from the contact point to the safety clearance point, the system precisely determines the minimum amount of obstruction required at the current seat angle to avoid interference and maintain aesthetics. This reference point is the key anchor point for subsequent curve fitting.

[0142] Step S16: Gradually reduce the backrest angle of the target seat while ensuring a safe gap between the curtain and the wrapping frame. Generate multiple data points and fit a continuous mapping curve based on these multiple data points.

[0143] Optionally, the seat back angle x0 is gradually decreased based on the backrest adjustment range xa ​​(in mm). (x0 can be calculated from the distance h1 from the top of the seat headrest to the backrest pivot, where h1 is a fixed value, and x0 = xa) 180 / (π h1) Record the backrest angle at this time, and record the corresponding position of the curtain. At this backrest angle, the gap between the curtain and the parcel rack is the safety gap X1.

[0144] The system controls the seat backrest to gradually adjust from its maximum angle to its minimum angle (or vice versa, covering the entire travel). At each specific backrest angle, steps S13-S15 are repeated: the curtain is extended until it contacts the wrap frame, then retracts to a safe clearance, and the curtain position at that angle is recorded. Alternatively, using known geometric relationships and motor parameters, the optimal curtain position for each angle is directly calculated and recorded, ensuring a safe clearance. Multiple data points (angle, curtain position) generated throughout the entire travel range are collected. The system processes these discrete data points using mathematical algorithms (such as polynomial fitting, spline interpolation, etc.) to generate a continuous function curve Y(x), where Y represents the curtain position and x represents the backrest angle.

[0145] The discrete calibration points are transformed into a continuous control model. This curve Y(x) becomes the "control map" in the seat adjustment process. In subsequent daily use, the controller only needs to read the current backrest angle x, and can calculate the precise position of the curtain in real time through the curve Y(x), without having to perform physical contact detection every time, which greatly improves the response speed and user experience.

[0146] Based on the above steps and the calibration strategy of "contact detection + safety gap retraction", the method of the present invention can accurately quantify the spatial relationship between the seat backrest and the parcel shelf. The gap is strictly controlled within 5 mm, which not only eliminates the risk of articles falling, but also avoids the danger of children's fingers being pinched. Compared with the traditional fixed gap design, this calibration method based on actual physical contact can adapt to deviations caused by different vehicle models, different seat wear degrees and manufacturing tolerances, ensuring extremely high safety redundancy.

[0147] The generated continuous mapping curve Y(x) enables the curtain to expand and retract smoothly and continuously with the change of the backrest angle. In a normal sitting position, the curtain is fully retracted, making the interior neat and beautiful; in the zero-gravity mode, the curtain is accurately deployed to seamlessly fill the gap. The whole process does not require manual operation by the user, realizes "insensible" intelligent adjustment, and improves the intelligence level and luxury feel of the vehicle.

[0148] When this method is used in conjunction with the aforementioned mechanical structure, the seat does not need to move forward significantly to avoid interference with the backrest movement as in the prior art. The adaptive expansion and retraction of the shielding assembly compensates for the spatial change caused by the rotation of the backrest, thereby maximizing the leg space for front and rear row passengers under the premise of a fixed wheelbase, and improving the spatial practicability of the whole vehicle.

[0149] In conclusion, through a systematic self-learning calibration process, the control method establishes a high-precision mapping relationship between the seat angle and the position of the shielding assembly, realizes dynamic, intelligent and safe shielding of the seat gap, and significantly improves the comfort, safety and intelligence level of the rear seat of an automobile.

[0150] Further, the control method further comprises: under the condition that it is determined that a target occupant is seated on the target seat, acquiring the current backrest angle of the target seat; based on the backrest angle, controlling the curtain to smoothly expand or retract along a preset arc-shaped track, so that a safety gap is formed between the curtain and the parcel shelf.

[0151] When it is confirmed through a pressure sensor, a weight sensor or a seat occupancy detection module that there is an occupant on the target seat, the system enters the "user driving mode" or "daily use mode" instead of the "self-learning calibration mode". At this time, the system reads data from an angle sensor (or a motor encoder) installed at the rotating shaft of the seat backrest in real time, and accurately obtains the current angle value of the seat backrest relative to the seat cushion (for example, any angle x between 0° and 170°). The presence of an occupant means that the seat is in an immediately usable state, and any mechanical movement must ensure comfort and safety, avoiding sudden mechanical movements that may startle the user or cause pinching injury. Obtaining the real-time angle is the prerequisite input for executing subsequent linkage control.

[0152] Using the continuous mapping curve Y(x) generated in step S16, and with the currently acquired backrest angle x as the independent variable, the corresponding target position Y(x) of the curtain is calculated. Alternatively, if the system adopts real-time closed-loop control, the required movement speed of the curtain is calculated based on the angle change rate. The controller sends commands to the actuators of the blocking components (such as electric strut motors, rotary motors, etc.) to drive the frame and curtain to move. Based on the aforementioned mechanical structure (such as a rotating frame + guide sleeve structure, or a pure rotating structure), the movement trajectory of the curtain is defined as a "preset arc trajectory". This means that the curtain does not simply extend and retract in a straight line, but follows the rotational geometry of the seat back and moves along a specific arc path. During the movement of the curtain along the preset trajectory, the system ensures in advance, through the mapping curve Y(x), that a preset "safety gap" (such as 2-5mm) is always maintained between the end of the curtain and the wrap frame. Through the dynamic adjustment of the curve Y(x), the system ensures that at any intermediate angle, the curtain will not make hard contact with the wrap frame (avoiding noise and wear), nor will it lose its blocking function or aesthetics due to excessive gap.

[0153] Specifically, during the linkage between seat backrest adjustment and the curtain adjustment, mechanical backlash, reverse backlash, and pulse equivalent error inevitably exist in the drive components (such as stepper motors and servo motors) and transmission mechanisms (such as electric struts, gears, and lead screws). When the seat backrest repeatedly performs a "forward-backward-forward" cyclical movement, the number of pulses or command values ​​output by the motor to reach the target angle will deviate slightly from the theoretical geometric position. This deviation does not increase linearly, but accumulates with changes in the direction of movement and mechanical rebound upon stopping. After multiple cycles, the "safety clearance X1" (e.g., 5mm) originally set during the calibration phase will gradually be compressed. When the error accumulates to a critical value, the action performed according to the preset curve Y(x) will cause the curtain to extend excessively, resulting in rigid contact with the wrapping frame.

[0154] Each time the curtain movement command is executed, the motor status (current, speed, stall signal) or the status of the dedicated contact sensor is monitored in real time. When the system detects that the curtain is in contact with the parcel rack (manifested as a sudden surge in motor current, a drop in speed to zero, or a sensor trigger signal), the current movement command is immediately stopped. At this point, the system determines the current actual physical state to be "zero clearance" (i.e., contact point). Since the system assumes that the previous curve Y(x) was designed based on a safety clearance of X1, the current contact means that the actual safety clearance has been completely consumed. The system infers that the current execution position is X1 distance greater than the theoretical safe position, or in other words, the theoretical position has shifted X1 in the "over-extend" direction.

[0155] To eliminate this accumulated error and restore the safety clearance, the currently detected "contact position" is used as a new temporary reference point. However, to maintain logical consistency, the system does not directly use this contact point as the final position but instead backs down. The curve is updated to Y(xa), where xa represents the displacement (or angle compensation) corresponding to the safety clearance. When contact occurs, it indicates that the actual "zero clearance" position is further out (or the backrest is further back) than the theoretical position. To restore the safety clearance, the system needs to shift the current control curve as a unit in the "contraction" direction. Subsequent adjustment commands are then executed using the updated curve Y(xa). Thereafter, every new adjustment will be based on this corrected reference, thus offsetting the previous accumulated error.

[0156] If errors continue to accumulate and contact occurs again, the system will re-detect and may further fine-tune the curve (or apply compensation only in this cycle, recalibrating on the next calibration). This mechanism allows the system to adapt to mechanical wear and errors in real time without requiring a complete recalibration, ensuring continuous safety.

[0157] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0158] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0159] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0160] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A rear seat for a car, characterized in that, include: Seat body (1); A shielding component (3) is integrated into the inner side of the backrest or the backrest surface of the seat body (1). The shielding component (3) has an unfolded state away from the seat body (1) and a working state in which it is retracted to different positions relative to the seat body (1). When the shielding component (3) is in the unfolded state or the working state, there is a certain gap between the seat body (1) and the wrapping frame (2), and the gap range is less than 5mm.

2. The rear seat of an automobile according to claim 1, characterized in that, The shading component (3) includes: A curtain (31) is provided, one end of which is connected to the backrest of the seat body (1), and the other end of which is connected to the frame (32). Electric mechanism (33) is located inside the seat body (1). The electric mechanism (33) is connected to the frame (32). The electric mechanism (33) drives the frame (32) to move along a preset trajectory, thereby driving the curtain (31) to extend and retract synchronously. When the shielding assembly (3) is in the unfolded state, the curtain (31) is unfolded to its maximum displacement. When the shielding assembly (3) is in the working state, at least part of the curtain (31) is stored inside the backrest of the seat body (1).

3. The rear seat of an automobile according to claim 2, characterized in that, The electric mechanism (33) includes: an electric support rod structure, one end of which is connected to the backrest frame (11) of the seat body (1) to form a first connection point a; the other end of which is connected to one end of the frame (32) to form a second connection point b; and the other end of the frame (32) is connected to the backrest frame (11) to form a third connection point c. The third connection point c is located below the first connection point a, and the electric strut structure can rotate around the first connection point a and the second connection point b.

4. The rear seat of an automobile according to claim 3, characterized in that, When the shielding assembly (3) is in the working state, when the seat body (1) tilts backward, the electric support structure retracts synchronously, causing the second connection point b to move toward the first connection point a, so that the frame (32) rotates along an arc trajectory toward the inside of the backrest frame (11) with the third connection point c as the center, thereby pulling the curtain (31) to be stored inside the backrest of the seat body (1), so that the shielding assembly (3) smoothly transitions from the unfolded state to the working state.

5. The rear seat of an automobile according to claim 3, characterized in that, The shielding assembly (3) also includes a guide sleeve (34), one end of which is connected to the backrest frame (11), and the other end of which is sleeved on the outside of the frame (32). The frame (32) is slidably arranged along the axial direction of the guide sleeve (34), and the other end of which is connected to the curtain (31) to form a fourth connection point d. One end of the electric support rod structure is connected to the backrest frame (11) of the seat body (1) to form a first connection a, and the other end of the electric support rod structure is connected to one end of the frame (32) to form a second connection point b. The frame (32) is connected to the backrest frame (11) through the guide sleeve (34).

6. The rear seat of an automobile according to claim 3, characterized in that, The shielding component (3) includes: a rotating mechanism, one end of which is connected to the backrest frame (11), and the other end of which is connected to one end of the frame (32) to form a connection point f. The other end of the frame (32) is connected to the curtain (31). The extension line of the frame (32) forms a first angle with the backrest frame (11). The rotating mechanism is used to drive the frame (32) to move, thereby driving the curtain (31) to switch between the unfolded state and the working state.

7. The rear seat of an automobile according to claim 3, characterized in that, The shielding component (3) further includes: a rotating frame (12), one end of which is connected to a rotating mechanism to form a first connection point a, the rotating mechanism is connected to the backrest frame (11), and the other end of the rotating frame (12) is provided with a guide sleeve (34). An electric strut structure, one end of which is connected to the rotating frame (12), and the other end of which is connected to the frame (32), forming a second connection point b; The other end of the frame (32) is connected to the curtain (31) to form a fourth connection point d. The end of the frame (32) connected to the electric support structure passes through the guide sleeve (34).

8. A vehicle, characterized in that, The vehicle has a rear seat, which is the rear seat of any one of claims 1-7.

9. A method for controlling the clearance between rear seats of an automobile, the method controlling the rear seats of the automobile as described in any one of claims 1 to 7, characterized in that, The control method includes: Obtain target occupant information for the target seat; If it is determined that no target occupant is sitting in the target seat, the target seat is adjusted to a preset angle, wherein the preset angle includes: a minimum angle and a maximum angle; The control shielding component is in a fully retracted state, and the position information of the curtain in the fully retracted state is calibrated; Control the target seat to adjust to the maximum angle, and control the curtain to gradually unfold; If it is determined that the curtain is in contact with the package rack, control the curtain to stop working; Control the curtain to gradually retract until there is a safe gap between the curtain and the package frame. Record the backrest angle and the position information of the curtain at this time as the first calibration reference point. The safe gap is less than 5mm. The backrest angle of the target seat is gradually reduced while ensuring a safe gap between the curtain and the wrapping frame. Multiple data points are generated, and a continuous mapping curve is fitted based on these multiple data points.

10. The control method according to claim 9, characterized in that, The control method further includes: If it is determined that the target occupant is sitting in the target seat, the backrest angle of the target seat is obtained. Based on the backrest angle, the curtain is controlled to smoothly unfold or retract along a preset arc trajectory, so that there is a safe gap between the curtain and the package rack.

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