Zero-gravity seat adjusting mechanism and control method thereof

Abstract

The invention relates to the technical field of automobile control, and discloses a zero-gravity seat adjusting mechanism and a control method thereof.The adjusting mechanism is arranged on a passenger seat on the right side of a middle row and comprises a cushion lifting mechanism, a leg support lifting and retracting mechanism and a backrest front-back adjusting mechanism which are arranged on a cushion framework; the first motor, the second motor, the third motor, the fourth motor and the fifth motor are fixedly arranged on the cushion framework. The seat can move towards the inner side, the seat is allowed to greatly slide in the front-back direction, the backrest framework is allowed to be subjected to large-angle back-leaning adjustment, the multi-direction adjustment function of the seat is reserved in a limited space, the phenomenon that adjustment is not synchronous due to the fact that a wire harness is too long and control logic errors is reduced, and when the seat is stuck or stopped, the seat can be stably adjusted. And after self-learning, operation is carried out again, so that the risk of interference to operation of the whole vehicle seat due to the fact that the wire harness is too long and the seat controller assembly is released can be effectively avoided.

Description

Technical Field

[0001] This invention belongs to the field of automotive control technology, and specifically relates to a zero-gravity seat adjustment mechanism and its control method. Background Technology

[0002] With economic development and the increasing ownership of private cars, consumers' demands for the overall performance of automobiles are also constantly rising. In addition to appearance and styling, passenger comfort has become one of the core considerations. Against this backdrop, six-seat configurations, as a highlight feature that enhances the practicality and comfort of vehicles, are being increasingly applied to various types of models.

[0003] To further enhance overall vehicle comfort, most 6-seater models adopt a 2 / 2 / 2 seating layout to maximize the use of seating space. The comfort of the right-hand seat in the middle row is particularly crucial. Zero-gravity seats, which distribute pressure evenly across the occupant's body and maintain a relaxed state, are an important feature for improving comfort in this position. The height, tilt angle, and other parameters of zero-gravity seats directly affect the pressure distribution on the human body; therefore, the zero-gravity seat adjustment mechanism must be adapted to the individual needs of different occupants to ensure comfort.

[0004] Due to space constraints in the vehicle, in order to avoid the risk of interference with the body panels during seat adjustment, existing zero-gravity seat adjustment mechanisms usually add a side-sliding mechanism—first, the seat is slid to the inner area, and then the seat frame is moved by the adjustment mechanism to complete the zero-gravity deployment.

[0005] In the existing technology, some zero-gravity seat adjustment mechanisms have achieved large-scale sliding of the seat in the fore-and-aft direction and large-angle reclining adjustment of the backrest. Through structural design, they have avoided interference with the side structure of the vehicle body and retained multi-directional adjustment functions in a limited space. However, problems such as asynchronous seat adjustment and mechanical opening of the leg rest still exist.

[0006] At the control logic level, the operation of existing zero-gravity seats is usually achieved through the cooperation of wiring harnesses, adjustment switches and vehicle domain controllers. When the seat experiences a malfunction such as sluggish operation or stagnation, the entire vehicle needs to be powered off to reset it. This control scheme has the problems of excessively long wiring harnesses and the fact that the adjustment switches and vehicle domain controllers are involved in the control process throughout the entire process, resulting in complex control strategies, long operating cycles, and a tendency to cause asynchronous seat adjustments. Summary of the Invention

[0007] To address the aforementioned issues, this invention provides a zero-gravity seat adjustment mechanism, which is installed on the right passenger seat in the middle row. The seat includes a seat cushion frame, a slide rail assembly, a backrest frame, and a leg support frame. The seat cushion frame is mounted on the slide rail assembly, which includes front and rear slide rails and left and right slide rails. The backrest frame is rotatably connected to one side of the seat cushion frame, and the leg support frame is rotatably connected to the other side of the seat cushion frame. The adjustment mechanism includes a seat cushion lifting mechanism, a leg support lifting and retracting mechanism, and a backrest front and back adjustment mechanism, all mounted on the seat cushion frame, as well as a first motor, a second motor, a third motor, a fourth motor, and a fifth motor, all fixedly mounted on the seat cushion frame. The first motor drives the front and rear slide rails to move the seat cushion frame back and forth. The second motor drives the left and right slide rails to move the seat cushion frame left and right. The third motor drives the seat cushion lifting mechanism to raise or lower the seat cushion frame. The fourth motor drives the leg rest lifting and retracting mechanism to unfold or retract the leg rest frame. The fifth motor drives the backrest front and back adjustment mechanism to adjust the tilt angle of the backrest frame.

[0008] Furthermore, the adjustment mechanism also includes a seat adjustment switch and a controller. The seat adjustment switch is electrically connected to the controller, and the controller is electrically connected to the first motor, the second motor, the third motor, the fourth motor, and the fifth motor.

[0009] The present invention also provides a control method for a zero-gravity seat adjustment mechanism, for the aforementioned zero-gravity seat adjustment mechanism, comprising the following steps: When it is necessary to recline the right passenger seat in the middle row, the second motor drives the left and right slide rails to move the seat cushion frame to the left by a first distance, then the first motor drives the front and rear slide rails to move the seat cushion frame backward by a second distance, the front seat moves forward by a third distance, and the backrest is adjusted forward to the most forward position. The third motor drives the seat cushion lifting mechanism to raise the seat cushion frame to the set height. The fourth motor drives the leg support lifting and retraction mechanism to unfold and raise the leg support frame to the maximum angle. The fifth motor drives the backrest front and back adjustment mechanism to adjust the backrest frame tilt angle to the maximum angle.

[0010] Furthermore, when it is necessary to restore the right passenger seat in the middle row, click the seat adjustment switch. The fourth motor drives the leg rest lifting and retraction mechanism to retract the leg rest frame, the first motor drives the front and rear slide rails to move the seat cushion frame to the foremost position, and at the same time the third motor drives the seat cushion lifting mechanism to lower the seat cushion frame to the lowest position. When the seat cushion frame of the right passenger seat in the middle row moves forward, the second motor drives the left and right slide rails to move the seat cushion frame to the right to the outermost position. The fifth motor drives the backrest fore-and-aft adjustment mechanism to adjust the backrest frame tilt angle to the angle before unfolding. After the right passenger seat in the middle row returns to the position before unfolding, the status of the right passenger seat in the middle row is fed back to the controller of the front seat. The controller of the front seat controls the front seat to move back to the position before adjustment.

[0011] Furthermore, it also includes the following steps: During the reclining action of the right passenger seat in the middle row, the manual adjustment of the fore-and-aft position of the seat cushion frame, the tilt angle of the backrest frame, and the angle of the leg support frame of the front and middle row seats can be stopped at any time. After the reclining action of the right passenger seat in the middle row stops, the front passenger seat can be moved. When the middle row right passenger seat is reclined, the angle of the backrest frame and the unfolding angle of the leg support frame of the middle row right passenger seat can be manually adjusted. The position of the middle row right passenger seat cannot be adjusted forward or backward, while the position of the front seats can be adjusted forward or backward.

[0012] Furthermore, if the right-side passenger seat in the middle row experiences a jam or stops during operation, control signals are sent to the first, second, and fifth motors, and the adjustment mechanism relearns, including the following steps: The second motor drives the left and right slide rails to move the seat cushion frame inward a set distance, the first motor drives the front and rear slide rails to move the seat cushion frame forward a set distance, and the fifth motor drives the backrest front and back adjustment mechanism to adjust the backrest frame to the zero position.

[0013] Furthermore, if any manual operation signal is detected in the seat adjustment switch during the automatic forward or backward movement of the middle row right passenger seat, manual operation will be performed, interrupting the automatic function.

[0014] Furthermore, if the right passenger seat in the middle row automatically moves backward and then is manually adjusted to move forward and backward, the right passenger seat in the middle row will no longer move forward automatically after power is applied; after the first motor receives the controller signal, the right passenger seat in the middle row will not move forward. If the right passenger seat in the middle row automatically moves back, and the manual adjustment of the right passenger seat in the middle row does not result in a forward or backward movement, the right passenger seat in the middle row will automatically move forward after power is applied; after the fifth motor receives the controller signal, the right passenger seat in the middle row will move forward.

[0015] Furthermore, if a power outage occurs during the movement of the right-side passenger seat in the middle row, the adjustment action before the power outage will not be performed again after power is restored, and the current action will be terminated; after the first motor receives the controller signal, the right-side passenger seat in the middle row will not move forward. When the Hall signal of the first motor of the middle row right passenger seat is abnormal, the automatic operation function will be interrupted. After the first motor receives the controller signal, the middle row right passenger seat will not move forward. If the controller of the middle row right passenger seat detects that the hard-wired switch signal is invalid, it will stop driving the first, second, third, fourth or fifth motor corresponding to the direction of action.

[0016] Furthermore, when it is detected that the motor has reached the soft stop point or stall point, the first motor, fourth motor or fifth motor corresponding to the driving direction is stopped; When the effective time of the switch signal exceeds the threshold, stop driving the first or fifth motor corresponding to the direction of the action. When an incorrect switch signal is detected, the current action of the right passenger seat in the middle row is canceled, and the right passenger seat in the middle row will not move. When two signals from the same motor drive with the same stroke are both valid, the passenger seat on the right side of the middle row will not move.

[0017] The beneficial effects of this invention are: 1. The adjustment mechanism of the present invention drives the left and right slide rails through the second motor to move the seat cushion frame inward, allowing the seat to slide in a large range in the front and back directions and the backrest frame to recline at a large angle. It retains the multi-directional adjustment function of the seat in a limited space, thereby providing sufficient and appropriate support for various parts of the body.

[0018] 2. The control method of the present invention allows the controller to perform one-key zero-voltage reset of the seat adjustment switch and wiring harness separately, reducing the phenomenon of asynchronous adjustment caused by excessive wiring harness length and control logic error.

[0019] 3. The control method of the present invention allows the adjustment mechanism to re-run after self-learning when the seat jams or stops, effectively avoiding the risk of interference in the operation of the entire vehicle seats caused by excessive wiring harness and release of the seat controller assembly.

[0020] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of a zero-gravity seat adjustment mechanism according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the leg support frame according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of a seat adjustment switch structure according to an embodiment of the present invention is shown; Figure 4A structural schematic diagram of the right-side passenger seat in the middle row, according to an embodiment of the present invention, is shown in its seated position. Figure 5 A schematic diagram of the structure of the right passenger seat in the middle row with the slide rail in the unlocked state according to an embodiment of the present invention is shown; Figure 6 This diagram illustrates the structure of the right-side passenger seat in the middle row according to an embodiment of the present invention, with the leg support frame, seat cushion frame, and backrest frame unlocked. Figure 7 A schematic diagram of a middle-row right-side passenger seat in zero gravity, according to an embodiment of the present invention, is shown. Figure 8 A schematic diagram of the adjustment strategy of the middle row seat controller according to an embodiment of the present invention is shown.

[0023] In the diagram: 1. Front and rear slide rails; 2. Left and right slide rails; 3. Seat cushion frame; 4. Backrest frame; 5. First motor; 6. Second motor; 7. Third motor; 8. Rotating connecting plate; 9. Leg rest lifting and retraction mechanism; 10. Backrest front and rear adjustment mechanism; 11. Seat adjustment switch. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that the terms "first," "second," etc., used in 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 data can be interchanged where appropriate for the embodiments of this application described herein. In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings.

[0026] This invention provides a zero-gravity seat adjustment mechanism that allows the seat to slide significantly in the fore-and-aft direction and the backrest to recline at a large angle without interfering with the side structure of the vehicle body. It retains the multi-directional adjustment function of the seat within a limited space. The seat controller is used to perform one-button zero-pressure reset of the seat adjustment switch and wiring harness in the zero-gravity seat, which solves the problem of asynchronous adjustment caused by excessive wiring harness and control logic error.

[0027] A zero-gravity seat adjustment mechanism is installed on the right passenger seat in the middle row, wherein, for example... Figure 1 As shown, the seat includes a seat cushion frame 3, a slide rail assembly, a backrest frame 4, and a leg support frame. The seat cushion frame 3 is mounted on the slide rail assembly, which includes front and rear slide rails 1 and left and right slide rails 2.

[0028] The backrest frame 4 is rotatably connected to one side of the seat cushion frame 3, and the leg support frame is rotatably connected to the other side of the seat cushion frame 3.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the adjustment mechanism includes a seat cushion lifting mechanism, a leg support lifting and retraction mechanism 9, and a backrest front and back adjustment mechanism 10, all mounted on the seat cushion frame 3. It also includes a first motor 5, a second motor 6, a third motor 7, a fourth motor, and a fifth motor, all fixedly mounted on the seat cushion frame 3. A rotating connecting plate 8 is fixedly mounted on the backrest frame 4, and the rotating connecting plate 8 is rotatably connected to the seat cushion frame 3 via the backrest front and back adjustment mechanism 10.

[0030] Among them, the first motor 5 is used to drive the front and rear slide rails 1 to move the seat cushion frame 3 back and forth, the second motor 6 is used to drive the left and right slide rails 2 to move the seat cushion frame 3 left and right, the third motor 7 is used to drive the seat cushion lifting mechanism to raise or lower the seat cushion frame 3, the fourth motor is used to drive the leg support lifting and retracting mechanism 9 to unfold and raise or retract the leg support frame, and the fifth motor is used to drive the backrest front and back adjustment mechanism 10 to adjust the tilt angle of the backrest frame 4.

[0031] The adjustment mechanism also includes a seat adjustment switch 11 and a controller. The seat adjustment switch 11 is electrically connected to the controller, and the controller is electrically connected to the first motor 5, the second motor 6, the third motor 7, the fourth motor, and the fifth motor.

[0032] like Figure 8 As shown, the seat adjustment switch 11 includes a zero-pressure reset switch 52-14 for the right passenger seat in the middle row, a fore-and-aft adjustment switch 52-1 for the left passenger seat in the middle row, a backrest and cushion adjustment switch 52-15 for the right passenger seat in the middle row, a backrest adjustment switch 52-2 for the left passenger seat in the middle row, a reserved analog input port 52-18, a reserved analog input port 52-21, a leg rest adjustment switch 52-5 for the right passenger seat in the middle row, a reserved analog input port 52-19, a reserved analog input port 52-16, a fore-and-aft adjustment switch 52-3 for the right passenger seat in the middle row, a reserved analog input port 52-17, and a reserved analog input port 52-8.

[0033] Among them, the zero-pressure reset switch 52-14 for the right passenger seat in the middle row includes a one-button recline button and a one-button restore button; the fore-and-aft adjustment switch 52-1 for the left passenger seat in the middle row includes a forward button and a backward button; the backrest and cushion adjustment switch 52-15 for the right passenger seat in the middle row includes a backrest backward button, a backrest forward button, a cushion frame 3 raise button, and a cushion frame 3 lower button; the backrest adjustment switch 52-2 for the left passenger seat in the middle row includes a backrest forward button and a backrest backward button; the leg rest adjustment switch 52-5 for the right passenger seat in the middle row includes a backward and downward folding button and a forward and upward folding button; and the fore-and-aft adjustment switch 52-3 for the right passenger seat in the middle row includes a forward button and a backward button.

[0034] Figure 8 In the configuration, the vehicle's constant power supply +30 is connected to power drive terminals 25-19 and 25-24. The controller is connected to the positive terminal of the fourth motor 25-12, the common terminal of the second motor 6 and the fourth motor 25-10, and the positive terminal of the second motor 6 25-1. The controller is also connected to the positive terminal of the first motor 5 25-8, the common terminal of the first motor 5 and the fifth motor 25-7, and the positive terminal of the fifth motor. The controller is also connected to the positive terminal of the third motor 7 25-16, the common terminal of the third motor 7 reserved for adjustment motor 25-17, and the positive terminal of the reserved adjustment motor 25-9.

[0035] like Figure 5 , Figure 6 and Figure 7 As shown, the working principle of the zero-gravity seat adjustment mechanism in this embodiment is as follows: By operating the seat adjustment switch 11, the controller controls the first motor 5, the second motor 6, the third motor 7, the fourth motor, and the fifth motor to unlock the front and rear slide rails 1, the left and right slide rails 2, the seat cushion frame 3, the leg support frame, and the backrest frame 4. The first motor 5 drives the front and rear slide rails 1 to move the seat cushion frame 3 backward, while the second motor 6 drives the left and right slide rails 2 to move the seat cushion frame 3 inward. Then, the third motor 7 drives the seat cushion lifting mechanism to raise the seat cushion frame 3, the fourth motor drives the leg support lifting and retraction mechanism 9 to unfold and raise the leg support frame, and the fifth motor drives the backrest front and rear adjustment mechanism 10 to lower the backrest frame 4, thereby providing sufficient and appropriate support for various parts of the body and achieving a highly relaxed state of the body. Figure 7 As shown.

[0036] This invention also provides a control method for a zero-gravity seat adjustment mechanism for a middle row right-side passenger seat, comprising the following steps: S1, such as Figure 4 As shown, Figure 4This is a structural diagram showing the seat in its seated position. When the middle row right passenger seat needs to be reclined, pressing the seat adjustment switch 11 activates the controller. The controller then activates the second motor 6 of the middle row right passenger seat, which drives the left and right slide rails 2 to move the seat cushion frame 3 to the left (inward) a first distance (e.g., 50mm). Next, the first motor 5 drives the front and rear slide rails 1 to move the seat cushion frame 3 backward a second distance (e.g., 90mm), and the front seat moves forward a third distance (e.g., 190mm), with the backrest adjusted to its forwardmost position. The third distance is greater than the second distance.

[0037] During the reclining action of the right passenger seat in the middle row, the manual adjustment of the fore-and-aft position of the seat cushion frame 3, the tilt angle of the backrest frame 4, and the angle of the leg support frame of the front and middle row seats can be stopped at any time. After the reclining action of the right passenger seat in the middle row stops, the front passenger seat can still move without being affected.

[0038] The controller controls the third motor 7 of the passenger seat on the right side of the middle row to drive the seat cushion lifting mechanism to raise the seat cushion frame 3 to the set height. The fourth motor drives the leg support lifting and retraction mechanism 9 to unfold and raise the leg support frame to the maximum angle. The fifth motor drives the backrest front and back adjustment mechanism 10 to adjust the backrest frame 4 to the maximum angle.

[0039] When the right passenger seat in the middle row is reclined, the tilt angle of the backrest frame 4 and the unfolding angle of the leg support frame of the right passenger seat in the middle row can be manually adjusted. The position of the right passenger seat in the middle row cannot be adjusted forward or backward, while the position of the front seats can be adjusted forward or backward.

[0040] S2. When it is necessary to restore the right passenger seat in the middle row, click the seat adjustment switch 11. The controller controls the fourth motor of the right passenger seat in the middle row to drive the leg support lifting and retraction mechanism 9 to retract the leg support frame. The first motor 5 drives the front and rear slide rails 1 to move the seat cushion frame 3 to the foremost position. At the same time, the third motor 7 drives the seat cushion lifting mechanism to lower the seat cushion frame 3 to the lowest position.

[0041] During the movement of the right passenger seat in the middle row, the manual adjustment of the fore-and-aft position of the seat cushion frame 3, the tilt angle of the backrest frame 4, and the angle of the leg support frame of the front and middle row seats can be stopped at any time. After the adjustment of the right passenger seat in the middle row is stopped, the movement of the front passenger seat is not affected.

[0042] When the seat cushion frame 3 of the right passenger seat in the middle row moves forward, the second motor 6 drives the left and right slide rails 2 to move the seat cushion frame 3 to the right (outer) position. The fifth motor drives the backrest front and back adjustment mechanism 10 to adjust the tilt angle of the backrest frame 4 to the angle before unfolding. After the right passenger seat in the middle row returns to the position before adjustment, the status of the right passenger seat in the middle row is fed back to the controller of the front seat. The controller of the front seat controls the front seat to move to the position before adjustment.

[0043] S3. If the right-side passenger seat in the middle row experiences a pause or stops during operation, after pressing the seat adjustment switch 11 for a set time (e.g., 8 seconds), the controller sends control signals to the first motor 5, the second motor 6, and the fifth motor. The adjustment mechanism then relearns. Specific operations include: The controller first controls the second motor 6 of the right passenger seat in the middle row to drive the left and right slide rails 2 to move the seat cushion frame 3 inward by a set distance (e.g., 108 hall). The first motor 5 drives the front and rear slide rails 1 to move the seat cushion frame 3 forward by a set distance (e.g., 420 hall). The fifth motor drives the backrest front and rear adjustment mechanism 10 to adjust the backrest frame 4 to the zero position (e.g., 5 hall).

[0044] If any manual operation signal is detected by the seat adjustment switch 11 during the automatic forward or backward movement of the middle row right passenger seat, manual operation is performed to interrupt the automatic function. Specifically, the zero-pressure reset switch 52-14 sends a signal to the controller, the controller recognizes the signal changes of the fourth motor and the second motor 6, and switches to control the fourth motor and the second motor 6 according to the signal of the seat adjustment switch 11, thereby forming the automatic operation interruption function of the seat.

[0045] If the right passenger seat in the middle row automatically moves backward after retracting, and the seat adjustment switch 11 is used to manually adjust the forward and backward movement of the right passenger seat in the middle row, the right passenger seat in the middle row will no longer move forward automatically after power is applied; after the first motor 5 receives the controller signal, the right passenger seat in the middle row will not move forward.

[0046] If the right passenger seat in the middle row automatically moves back, and the manual adjustment of the right passenger seat in the middle row via the seat adjustment switch 11 does not result in it moving forward or backward, the right passenger seat in the middle row will automatically move forward after power is applied; after the fifth motor receives the controller signal, the right passenger seat in the middle row will move forward.

[0047] If a power outage occurs (battery failure) during the movement of the right-side passenger seat in the middle row, the adjustment action before the power outage will not be executed again upon power restoration, and the current movement will terminate. In other words, the automatic forward movement will not occur upon the first restoration of constant power. After receiving the controller signal, the first motor 5 will not move the right-side passenger seat in the middle row forward.

[0048] If the Hall effect signal of the first motor 5 in the middle row right passenger seat is abnormal, the automatic operation function will be interrupted. After receiving the controller signal, the first motor 5 will not move the middle row right passenger seat forward.

[0049] When the controller of the middle row right passenger seat detects that the hard-wired switch signal is invalid, it stops driving the first motor 5, the second motor 6, the third motor 7, the fourth motor, or the fifth motor corresponding to the direction of action.

[0050] When the controller of the passenger seat on the right side of the middle row detects that the motor has reached the soft stop point or stall point, it stops driving the first motor 5, the fourth motor or the fifth motor corresponding to the direction of the driving action.

[0051] When the controller of the passenger seat on the right side of the middle row detects that the effective time of the switch signal exceeds the threshold (for example, the threshold for the first motor 5 is 30s and the threshold for the fifth motor is 60s), it stops driving the first motor 5 or the fifth motor corresponding to the direction of the driving action. When the controller of the middle row right passenger seat detects an incorrect switch signal, the current action of the middle row right passenger seat is canceled, and the middle row right passenger seat will not move.

[0052] When the controller of the middle row right passenger seat detects that both signals from the same motor drive with the same stroke are valid, the middle row right passenger seat will not move.

[0053] If the passenger seat on the right side of the middle row needs to return to normal operation, after clicking the seat adjustment switch 11 to set the time (e.g., 8 seconds), the adjustment mechanism will self-learn and restart, including the following steps: after clicking the seat adjustment switch 11 to set the time, the controller receives the signal from the seat adjustment switch 11 and sends the controller signal to the second motor 6 to drive it. The second motor 6 drives the left and right slide rails 2 to move inward a set distance (e.g., 50mm).

[0054] The controller signal is then sent to the first motor 5, which drives the front and rear slide rails 1 to move backward a set distance (e.g., 90mm). The controller signal is then sent to the fifth and third motors 7, which drive the backrest frame 4 and the seat cushion frame 3 synchronously. Finally, the controller signal is sent to the fourth motor, which lifts the leg support frame to achieve a near-floating, relaxed posture (121° lumbar, 136° leg), reducing the pressure of long journeys. Figure 7 As shown.

[0055] When a problem occurs with the zero-gravity seat, the adjustment mechanism can relearn and restart, effectively avoiding the risk of interference in the operation of the entire vehicle's seats caused by excessive wiring harness length or the release of the seat controller assembly.

[0056] It should be noted that in this embodiment of the invention, the right-hand passenger seat and the left-hand passenger seat in the middle row share a single controller. The controller has a control terminal for the left-hand seat and a control terminal for the right-hand seat. The control method of the zero-gravity seat adjustment mechanism in this embodiment of the invention is for the right-hand passenger seat in the middle row. Therefore, the specific working logic of the seat adjustment switch 11 and the controller regarding the control terminal for the left-hand seat in the middle row will not be described. The following describes the port connection relationship between the seat adjustment switch 11, the controller, and the motor: like Figure 8As shown, the controller is also connected to the positive terminal 25-4 of the backrest adjustment motor of the left middle row seat, the common terminal 25-3 of the horizontal and backrest adjustment motor of the left middle row seat, and the positive terminal 25-2 of the horizontal adjustment motor of the left middle row seat. The controller is also connected to the positive terminal 25-6 and the negative terminal 25-5 of the leg rest adjustment motor of the left middle row seat.

[0057] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A zero-gravity seat adjustment mechanism, characterized in that, The passenger seat located on the right side of the middle row includes a seat cushion frame (3), a slide rail assembly, a backrest frame (4), and a leg support frame. The seat cushion frame (3) is mounted on the slide rail assembly, which includes front and rear slide rails (1) and left and right slide rails (2). The backrest frame (4) is rotatably connected to one side of the seat cushion frame (3), and the leg support frame is rotatably connected to the other side of the seat cushion frame (3). The adjustment mechanism includes a seat cushion lifting mechanism, a leg support lifting and retracting mechanism (9) and a backrest front and back adjustment mechanism (10) mounted on the seat cushion frame (3), as well as a first motor (5), a second motor (6), a third motor (7), a fourth motor and a fifth motor fixedly mounted on the seat cushion frame (3); The first motor (5) is used to drive the front and rear slide rails (1) to move the seat cushion frame (3) back and forth. The second motor (6) is used to drive the left and right slide rails (2) to move the seat cushion frame (3) left and right. The third motor (7) is used to drive the seat cushion lifting mechanism to raise or lower the seat cushion frame (3). The fourth motor is used to drive the leg support lifting and retracting mechanism (9) to unfold and raise or retract the leg support frame. The fifth motor is used to drive the backrest front and back adjustment mechanism (10) to adjust the tilt angle of the backrest frame (4).

2. The zero-gravity seat adjustment mechanism according to claim 1, characterized in that, The adjustment mechanism also includes a seat adjustment switch (11) and a controller. The seat adjustment switch (11) is electrically connected to the controller, and the controller is electrically connected to the first motor (5), the second motor (6), the third motor (7), the fourth motor, and the fifth motor.

3. A control method for a zero-gravity seat adjustment mechanism, characterized in that, The zero-gravity seat adjustment mechanism according to claim 1 or 2 includes the following steps: When it is necessary to recline the passenger seat on the right side of the middle row, the second motor (6) drives the left and right slide rails (2) to move the seat cushion frame (3) to the left by a first distance, then the first motor (5) drives the front and rear slide rails (1) to move the seat cushion frame (3) to the back by a second distance, the front seat moves forward by a third distance, and the backrest is adjusted forward to the most forward position. The third motor (7) drives the seat cushion lifting mechanism to raise the seat cushion frame (3) to the set height. The fourth motor drives the leg support lifting and retraction mechanism (9) to unfold and raise the leg support frame to the maximum angle. The fifth motor drives the backrest front and back adjustment mechanism (10) to adjust the backrest frame (4) to the maximum angle.

4. The control method for the zero-gravity seat adjustment mechanism according to claim 3, characterized in that, When it is necessary to restore the right passenger seat in the middle row, click the seat adjustment switch (11). The fourth motor drives the leg support lifting and retraction mechanism (9) to retract the leg support frame. The first motor (5) drives the front and rear slide rails (1) to move the seat cushion frame (3) to the frontmost position. At the same time, the third motor (7) drives the seat cushion lifting mechanism to lower the seat cushion frame (3) to the lowest position. When the seat cushion frame (3) of the right passenger seat in the middle row moves forward, the second motor (6) drives the left and right slide rails (2) to move the seat cushion frame (3) to the right to the outermost position. The fifth motor drives the backrest front and back adjustment mechanism (10) to adjust the tilt angle of the backrest frame (4) to the angle before unfolding. After the right passenger seat in the middle row returns to the position before unfolding, the status of the right passenger seat in the middle row is fed back to the controller of the front seat. The controller of the front seat controls the front seat to move to the position before adjustment.

5. The control method for the zero-gravity seat adjustment mechanism according to claim 3, characterized in that, It also includes the following steps: During the reclining action of the right passenger seat in the middle row, the manual adjustment of the fore-and-aft position of the seat cushion frame (3), the tilt angle of the backrest frame (4), and the angle of the leg support frame of the front and middle row seats can be stopped at any time. After the reclining action of the right passenger seat in the middle row stops, the front passenger seat can be moved. When the right passenger seat in the middle row is reclined, the tilt angle of the backrest frame (4) and the unfolding angle of the leg support frame of the right passenger seat in the middle row can be manually adjusted. The position of the right passenger seat in the middle row cannot be adjusted forward or backward, while the position of the front seats can be adjusted forward or backward.

6. The control method for the zero-gravity seat adjustment mechanism according to claim 3, characterized in that, If the right passenger seat in the middle row jams or stops during operation, control signals are sent to the first motor (5), the second motor (6), and the fifth motor. The adjustment mechanism then relearns itself, including the following steps: The second motor (6) drives the left and right slide rails (2) to move the seat cushion frame (3) inward a set distance. The first motor (5) drives the front and rear slide rails (1) to move the seat cushion frame (3) forward a set distance. The fifth motor drives the backrest front and back adjustment mechanism (10) to adjust the backrest frame (4) to the zero position.

7. The control method for the zero-gravity seat adjustment mechanism according to claim 3, characterized in that, If any manual operation signal is detected by the seat adjustment switch (11) during the automatic forward or backward movement of the middle row right passenger seat, the manual operation is executed and the automatic function is interrupted.

8. The control method for the zero-gravity seat adjustment mechanism according to claim 3, characterized in that, If the right passenger seat in the middle row automatically moves back and then is manually adjusted to move forward and backward, the right passenger seat in the middle row will no longer move forward automatically after power is applied; after the first motor (5) receives the controller signal, the right passenger seat in the middle row will not move forward. If the right passenger seat in the middle row automatically moves back, and the manual adjustment of the right passenger seat in the middle row does not move it forward or backward, the right passenger seat in the middle row will automatically move forward after power is turned on. After receiving the controller signal, the fifth motor will move the passenger seat on the right side of the middle row forward.

9. The control method for the zero-gravity seat adjustment mechanism according to any one of claims 3-8, characterized in that, If the power is cut off during the operation of the right passenger seat in the middle row, the adjustment action before the power failure will not be performed again after the power is restored, and the operation will be terminated; after the first motor (5) receives the controller signal, the right passenger seat in the middle row will not move forward; When the Hall signal of the first motor (5) of the middle row right passenger seat is abnormal, the automatic operation function will be interrupted. After the first motor (5) receives the controller signal, the middle row right passenger seat will not move forward. If the controller of the middle row right passenger seat detects that the hard-wired switch signal is invalid, it will stop driving the first motor (5), second motor (6), third motor (7), fourth motor or fifth motor corresponding to the driving direction.

10. The control method for the zero-gravity seat adjustment mechanism according to any one of claims 3-8, characterized in that, When it is detected that the motor has reached the soft stop point or stall point, stop driving the first motor (5), the fourth motor or the fifth motor corresponding to the driving direction; When the effective time of the switch signal exceeds the threshold, stop driving the first motor (5) or the fifth motor corresponding to the direction of the action. When an incorrect switch signal is detected, the current action of the right passenger seat in the middle row is canceled, and the right passenger seat in the middle row will not move. When two signals from the same motor drive with the same stroke are both valid, the passenger seat on the right side of the middle row will not move.

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