Vehicle seat system and adjusting method of vehicle seat back plate

Abstract

The invention discloses a vehicle seat system and an adjusting method of a vehicle seat back plate. The system comprises a seat, a back plate, an upper sliding block assembly, a lower sliding block assembly, an upper connecting rod, a lower connecting rod, a driving motor and a controller. The controller obtains the current position of the upper connecting rod and the current position of the lower connecting rod after the chair back deflects; setting a backboard target position, and obtaining an upper connecting rod target position and a lower connecting rod target position corresponding to the backboard target position; obtaining upper sliding block displacement according to the current position of the upper connecting rod and the target position of the upper connecting rod; obtaining lower sliding block displacement according to the lower connecting rod current position and the lower connecting rod target position; the target position of the backboard is adjusted, so that the total displacement of the sum of the upper sliding block displacement and the lower sliding block displacement is shortest; and the driving motor is controlled to enable the upper sliding block assembly, the lower sliding block assembly and the lower connecting rod to move according to the corresponding displacement and angle. The position of the back plate can be adjusted in a self-adaptive mode along with inclination of the seat, the occupied space is small during adjustment, and better comfort and convenience are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle component control, and in particular to a vehicle seat system and a method for adjusting a vehicle seat back panel. Background Art

[0002] As people's requirements for the functionality and comfort of vehicle interiors increase, more and more vehicles are equipped with back panels behind the seats, which can be used as functional devices such as small tables or display screens.

[0003] However, the prior art often only realizes the free adjustment of the opening angle of the back panel body. When the seat leans back, the back panel cannot automatically adjust its position with the seat, which affects the user experience and needs to be adjusted manually by the user, which is less convenient. Summary of the invention

[0004] In view of this, the present application provides a vehicle seat system and a method for adjusting a vehicle seat back panel, which can adaptively adjust the position of the back panel as the seat tilts, and occupies less space during adjustment, providing better comfort and convenience.

[0005] To solve the above problems, the technical solutions provided by this application are as follows:

[0006] In a first aspect, the present application provides a vehicle seat system, comprising: a seat, a back panel, an upper slider assembly, a lower slider assembly, an upper connecting rod, a lower connecting rod, a drive motor and a controller;

[0007] The upper slider assembly and the lower slider assembly are both fixed to the backrest of the seat;

[0008] The first end of the upper connecting rod is connected to the upper slider assembly; the second end of the upper connecting rod is connected to the upper connecting rod fixing shaft of the back plate;

[0009] The first end of the lower connecting rod is connected to the lower slider assembly; the second end of the lower connecting rod is connected to the lower connecting rod fixing shaft of the back plate;

[0010] Controller for:

[0011] After the seat back is deflected, the current position of the upper link and the current position of the lower link are obtained;

[0012] Set the back plate target position, and obtain the upper link target position and the lower link target position corresponding to the back plate target position;

[0013] The displacement of the upper slider is obtained according to the current position of the upper link and the target position of the upper link; the displacement of the lower slider is obtained according to the current position of the lower link and the target position of the lower link;

[0014] Adjust the target position of the back plate so that the total displacement of the upper slider and the lower slider is the shortest;

[0015] Control the drive motor to make the upper slider assembly move according to the upper slider displacement when the total displacement is the shortest; control the drive motor to make the lower slider assembly move according to the lower slider displacement when the total displacement is the shortest; control the drive motor to make the azimuth angle of the lower connecting rod the angle corresponding to the target position of the lower connecting rod when the total displacement is the shortest.

[0016] Preferably, the controller is specifically used to obtain the upper connecting rod target position and the lower connecting rod target position corresponding to the back panel target position according to the back panel target position, the deflection angle of the chair back, the length of the upper connecting rod, the length of the lower connecting rod and the back panel axis width; the back panel axis width is the width between the upper connecting rod fixed axis and the lower connecting rod fixed axis.

[0017] Preferably, the seat includes a seat back rotation axis; the connection between the upper connecting rod and the upper slider assembly is the first rotation center; the connection between the lower connecting rod and the lower slider assembly is the second rotation center;

[0018] Controller, specifically for:

[0019] Take the side of the seat as the plane and the center of the seat back rotation axis as the origin to establish a plane rectangular coordinate system;

[0020] In the coordinate system, the position of the upper link is represented by the coordinates of the first rotation center and the coordinates of the fixed axis of the upper link; the position of the lower link is represented by the coordinates of the second rotation center and the coordinates of the fixed axis of the lower link; the position of the back plate is represented by the coordinates of the fixed axis of the upper link and the coordinates of the fixed axis of the lower link.

[0021] Preferably, the controller is specifically used for:

[0022] Establishing a first positional relationship between a first rotation center and a second rotation center according to an initial angle between a seat back and a coordinate axis, a deflection angle of the seat back, and an offset between a center of a slider and a rotation axis of the seat;

[0023] Establishing a second positional relationship between the first rotation center and the fixed axis of the upper connecting rod according to the length of the upper connecting rod and the azimuth angle of the upper connecting rod;

[0024] Establishing a third position relationship between the second rotation center and the fixed axis of the lower connecting rod according to the length of the lower connecting rod and the azimuth angle of the lower connecting rod;

[0025] Establishing a fourth position relationship between the upper connecting rod fixed axis and the lower connecting rod fixed axis according to the back plate axis width and the azimuth angle of the back plate;

[0026] Based on the first positional relationship, the second positional relationship, the third positional relationship and the fourth positional relationship, the relationship between the coordinates of the first rotation center, the coordinates of the second rotation center and the target position of the back plate is obtained.

[0027] Preferably, one side of the back panel is used as a small table top; the other side of the back panel is used as a display screen;

[0028] When the back panel is used as a display screen, the controller is also used to control the lower slider assembly and the upper slider assembly so that the lower connecting rod fixed axis is higher than the upper connecting rod fixed axis.

[0029] Preferably, the upper slider assembly specifically includes a first upper slider assembly and a second upper slider assembly; the lower slider assembly specifically includes a first lower slider assembly and a second lower slider assembly; the upper connecting rod specifically includes a first upper connecting rod and a second upper connecting rod; the lower connecting rod specifically includes a first lower connecting rod and a second lower connecting rod;

[0030] The drive motor specifically includes: a first drive motor, a second drive motor and a third drive motor;

[0031] The first upper slider assembly, the second upper slider assembly, the first lower slider assembly, and the second lower slider assembly are all fixed to the seat back;

[0032] The first end of the first upper connecting rod is connected to the first upper sliding block assembly, and the second end of the first upper connecting rod is connected to the first end of the upper connecting rod fixed shaft;

[0033] The first end of the second upper connecting rod is connected to the second upper sliding block assembly, and the second end of the second upper connecting rod is connected to the second end of the upper connecting rod fixed shaft;

[0034] The first end of the first lower connecting rod is connected to the first lower sliding block assembly, and the second end of the first lower connecting rod is connected to the first end of the lower connecting rod fixed shaft;

[0035] The first end of the second lower connecting rod is connected to the second lower sliding block assembly, and the second end of the second lower connecting rod is connected to the second end of the lower connecting rod fixed shaft;

[0036] The first drive motor is used to control the displacement of the first lower slider assembly; the second drive motor is used to control the azimuth angle of the lower connecting rod; and the third drive motor is used to control the displacement of the first upper slider assembly.

[0037] Preferably, the first lower slider assembly specifically includes: a lower slider shaft, a first bearing, a second bearing, a lower slider gear, a lower slider rack, a first lower slider and a first lower slider guide rail;

[0038] The first driving motor is connected to the lower slider shaft by a key; the lower slider shaft is connected to the lower slider gear by a key;

[0039] The lower slider shaft is connected to the first lower connecting rod through the first bearing; the lower slider shaft is connected to the first lower slider through the second bearing; the first lower slider and the first lower slider guide rail are connected by a moving pair; the first lower slider guide rail, the lower slider rack and the seat are fixedly connected.

[0040] Preferably, the second lower slider assembly specifically includes: a lower connecting rod shaft, a third bearing, a second lower slider and a second lower slider guide rail;

[0041] The second drive motor is connected to the lower connecting rod shaft by a key; the lower connecting rod shaft is connected to the second lower connecting rod by a key;

[0042] The lower connecting rod shaft is connected to the second lower slider through the third bearing; the second lower slider is connected to the second lower slider guide rail by a moving pair; the second lower slider guide rail is fixedly connected to the seat.

[0043] A second aspect of the present application provides a method for adjusting a vehicle seat back panel, which is applied to a vehicle seat system, the system comprising: a seat, a back panel, an upper slider assembly, a lower slider assembly, an upper connecting rod, a lower connecting rod, a drive motor and a controller;

[0044] The upper slider assembly and the lower slider assembly are both fixed to the backrest of the seat;

[0045] The first end of the upper connecting rod is connected to the upper slider assembly; the second end of the upper connecting rod is connected to the upper connecting rod fixing shaft of the back plate;

[0046] The first end of the lower connecting rod is connected to the lower slider assembly; the second end of the lower connecting rod is connected to the lower connecting rod fixing shaft of the back plate;

[0047] Methods include:

[0048] After the seat back is deflected, the current position of the upper link and the current position of the lower link are obtained;

[0049] Set the back plate target position, and obtain the upper link target position and the lower link target position corresponding to the back plate target position;

[0050] The displacement of the upper slider is obtained according to the current position of the upper link and the target position of the upper link; the displacement of the lower slider is obtained according to the current position of the lower link and the target position of the lower link;

[0051] Adjust the target position of the back plate so that the total displacement of the upper slider and the lower slider is the shortest;

[0052] The upper slider assembly is controlled to move according to the upper slider displacement when the total displacement is the shortest; the lower slider assembly is controlled to move according to the lower slider displacement when the total displacement is the shortest; and the azimuth angle of the lower connecting rod is controlled to be the angle corresponding to the target position of the lower connecting rod when the total displacement is the shortest.

[0053] Preferably, obtaining the upper connecting rod target position and the lower connecting rod target position corresponding to the back plate target position specifically includes:

[0054] According to the backboard target position, the deflection angle of the seat back, the length of the upper link, the length of the lower link and the backboard axis width, the upper link target position and the lower link target position corresponding to the backboard target position are obtained; the backboard axis width is the width between the upper link fixed axis and the lower link fixed axis.

[0055] Preferably, the seat includes a seat back rotation axis; the connection between the upper connecting rod and the upper slider assembly is the first rotation center; the connection between the lower connecting rod and the lower slider assembly is the second rotation center;

[0056] The positions of the upper link, lower link and back plate are represented as follows:

[0057] Take the side of the seat as the plane and the center of the seat back rotation axis as the origin to establish a plane rectangular coordinate system;

[0058] In the coordinate system, the position of the upper link is represented by the coordinates of the first rotation center and the coordinates of the fixed axis of the upper link; the position of the lower link is represented by the coordinates of the second rotation center and the coordinates of the fixed axis of the lower link; the position of the back plate is represented by the coordinates of the fixed axis of the upper link and the coordinates of the fixed axis of the lower link.

[0059] Preferably, obtaining the upper connecting rod target position and the lower connecting rod target position corresponding to the back plate target position specifically includes:

[0060] Establishing a first positional relationship between a first rotation center and a second rotation center according to an initial angle between a seat back and a coordinate axis, a deflection angle of the seat back, and an offset between a center of a slider and a rotation axis of the seat;

[0061] Establishing a second positional relationship between the first rotation center and the fixed axis of the upper connecting rod according to the length of the upper connecting rod and the azimuth angle of the upper connecting rod;

[0062] Establishing a third position relationship between the second rotation center and the fixed axis of the lower connecting rod according to the length of the lower connecting rod and the azimuth angle of the lower connecting rod;

[0063] Establishing a fourth position relationship between the upper connecting rod fixed axis and the lower connecting rod fixed axis according to the back plate axis width and the azimuth angle of the back plate;

[0064] Based on the first positional relationship, the second positional relationship, the third positional relationship and the fourth positional relationship, the relationship between the coordinates of the first rotation center, the coordinates of the second rotation center and the target position of the back plate is obtained.

[0065] It can be seen that this application has the following beneficial effects:

[0066] The vehicle seat system provided by the present application includes: a seat, a backboard, an upper slider assembly, a lower slider assembly, an upper connecting rod, a lower connecting rod, a driving motor and a controller; the upper slider assembly and the lower slider assembly are both fixed to the back of the seat; the first end of the upper connecting rod is connected to the upper slider assembly; the second end of the upper connecting rod is connected to the upper connecting rod fixing shaft of the backboard; the first end of the lower connecting rod is connected to the lower slider assembly; the second end of the lower connecting rod is connected to the lower connecting rod fixing shaft of the backboard. The controller is used to: obtain the current position of the upper connecting rod and the current position of the lower connecting rod after the back of the seat is deflected; set the backboard target position, and obtain the upper connecting rod target position and the lower connecting rod target position corresponding to the backboard target position. Under the above structure and connection relationship, since the lengths of the upper connecting rod and the lower connecting rod are fixed, and the upper slider assembly and the lower slider assembly are fixed to the backrest, the angle of the backrest will no longer change after the deflection is completed, and the upper slider assembly and the lower slider assembly slide along the straight line where the backrest is located; therefore, the corresponding upper connecting rod target position and lower connecting rod target position can be determined by setting the back plate target position. The upper slider displacement is obtained according to the current position of the upper connecting rod and the upper connecting rod target position; the lower slider displacement is obtained according to the current position of the lower connecting rod and the lower connecting rod target position; the back plate target position is adjusted so that the total displacement of the sum of the upper slider displacement and the lower slider displacement is the shortest. The drive motor is controlled to make the upper slider assembly move according to the upper slider displacement when the total displacement is the shortest; the drive motor is controlled to make the lower slider assembly move according to the lower slider displacement when the total displacement is the shortest; the drive motor is controlled to make the azimuth of the lower connecting rod be the angle corresponding to the lower connecting rod target position when the total displacement is the shortest. Controlling the position of the upper slider assembly, the position of the lower slider assembly and the connecting rod angle can ensure the stability of the adjusted back panel; controlling according to the parameters when the total displacement is the shortest, so that during the adjustment process, the displacement is minimized, the occupied space is also correspondingly minimized, and the impact on surrounding people and objects is small, thereby improving the comfort and convenience of using the vehicle seat back panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 A schematic diagram of a vehicle seat system provided in an embodiment of the present application;

[0068] Figure 2 A schematic diagram of a coordinate system for a vehicle seat system provided in an embodiment of the present application;

[0069] Figure 3 A schematic diagram of various structures of a vehicle seat system provided by an embodiment of the present application in a coordinate system;

[0070] Figure 4 A schematic diagram of a back plate of a vehicle seat system provided in an embodiment of the present application;

[0071] Figure 5 A schematic diagram of switching back panel modes of a vehicle seat system provided in an embodiment of the present application;

[0072] Figure 6 A schematic diagram of adjusting a back plate of a vehicle seat system provided in an embodiment of the present application;

[0073] Figure 7 A schematic diagram of a first lower slider assembly provided in an embodiment of the present application;

[0074] Figure 8 A schematic diagram of a second lower slider assembly provided in an embodiment of the present application;

[0075] Fig. 9 A schematic diagram of a first upper slider assembly provided in an embodiment of the present application;

[0076] Fig.10 A schematic diagram of a second upper slider assembly provided in an embodiment of the present application;

[0077] Fig.11 A flow chart of a method for adjusting a vehicle seat back panel provided in an embodiment of the present application. DETAILED DESCRIPTION

[0078] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the embodiments of the present application are further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0079] See also Figure 1 , which is a schematic diagram of a vehicle seat system provided in an embodiment of the present application.

[0080] The vehicle seat system provided in the embodiment of the present application includes: a seat 101, a back panel 102, an upper slider assembly 103, a lower slider assembly 104, an upper connecting rod 105, a lower connecting rod 106, a drive motor 107 and a controller (not shown in the figure).

[0081] The upper slider assembly 103 and the lower slider assembly 104 are both fixed to the backrest of the seat 101 .

[0082] The first end of the upper connecting rod 105 is connected to the upper slider assembly 103 ; the second end of the upper connecting rod 105 is connected to the upper connecting rod fixing shaft 121 of the back plate 102 .

[0083] The first end of the lower connecting rod 106 is connected to the lower slider assembly 104 ; the second end of the lower connecting rod 106 is connected to the lower connecting rod fixing shaft 122 of the back plate 102 .

[0084] In order to conveniently and clearly introduce the vehicle seat system provided by the embodiment of the present application, Figure 1The following is an example of two upper connecting rods and two lower connecting rods. It should be understood that the back plate is more stable when two upper connecting rods and two lower connecting rods are used; however, in other possible implementations, one upper connecting rod and one lower connecting rod may also be used in the middle of the back plate, and this application does not make specific limitations on this.

[0085] Corresponding to the case of two upper connecting rods and two lower connecting rods, the upper slider assembly specifically includes a first upper slider assembly and a second upper slider assembly; the lower slider assembly specifically includes a first lower slider assembly and a second lower slider assembly; the upper connecting rod specifically includes a first upper connecting rod and a second upper connecting rod; and the lower connecting rod specifically includes a first lower connecting rod and a second lower connecting rod.

[0086] Among them, two upper slider assemblies, two lower slider assemblies, two upper connecting rods and two lower connecting rods are arranged on the left and right sides of the seat back, respectively. The present application does not limit the specific position of the above structure on the seat back.

[0087] The first upper slider assembly, the second upper slider assembly, the first lower slider assembly and the second lower slider assembly are all fixed to the seat back of the seat.

[0088] The first end of the first upper connecting rod is connected to the first upper slider assembly, and the second end of the first upper connecting rod is connected to the first end of the upper connecting rod fixed shaft. The first end of the second upper connecting rod is connected to the second upper slider assembly, and the second end of the second upper connecting rod is connected to the second end of the upper connecting rod fixed shaft.

[0089] The first end of the first lower connecting rod is connected to the first lower slider assembly, and the second end of the first lower connecting rod is connected to the first end of the lower connecting rod fixed shaft. The first end of the second lower connecting rod is connected to the second lower slider assembly, and the second end of the second lower connecting rod is connected to the second end of the lower connecting rod fixed shaft.

[0090] The three drive motors 107 are also only used as a possible implementation method, which are respectively connected to the second upper connecting rod, the first lower connecting rod and the second lower connecting rod; this application does not specifically limit the number of drive motors used and the installation position; for example: the drive motor of the second upper connecting rod can also be installed on the first upper connecting rod.

[0091] Controller for:

[0092] After the seat back is deflected, the current position of the upper link and the current position of the lower link are obtained.

[0093] It should be understood that when the seat back is deflected, the original suitable back plate position will change, so adjustment is required. The current position of the upper link and the current position of the lower link obtained at this time refer to the positions of the upper link and the lower link before adjustment after the seat back is deflected.

[0094] for Figure 1In the vehicle seat system shown, since the first upper link and the second upper link are both connected to the upper link fixed shaft, the first upper link and the second upper link are always parallel; therefore, by obtaining the position of the upper link, the position of any upper link can be obtained. Similarly, the first lower link and the second lower link are also always parallel, and the position of any lower link can be obtained.

[0095] Set the back plate target position, and obtain the upper link target position and the lower link target position corresponding to the back plate target position.

[0096] Among them, the back panel target position is set, specifically, the distance between the back panel and the seat back, the back panel angle, etc. can be set; since the lengths of the upper connecting rod and the lower connecting rod are fixed, and the upper slider assembly and the lower slider assembly are fixed to the seat back, the angle of the seat back no longer changes after the deflection is completed, and the upper slider assembly and the lower slider assembly slide along the straight line where the seat back is located; therefore, the corresponding upper connecting rod target position and lower connecting rod target position can be determined by setting the back panel target position.

[0097] Since there are many possible backplane target positions, when setting the backplane target position, it is also possible not to set specific parameters but to use variables to represent it.

[0098] The displacement of the upper slider is obtained according to the current position of the upper link and the target position of the upper link; the displacement of the lower slider is obtained according to the current position of the lower link and the target position of the lower link.

[0099] Adjust the target position of the back plate so that the total displacement of the sum of the upper slider displacement and the lower slider displacement is the shortest.

[0100] In order to reduce the space occupied by the backplane during adjustment, the controller obtains the upper and lower slider displacements between the target position and the current position respectively, and adjusts the target position of the backplane with the shortest total displacement of the sum of the upper and lower slider displacements as the goal.

[0101] For the case where the backplane target position is represented by a variable as mentioned in the above example, the total displacement expression with the backplane target position variable can be obtained, and conversely, the value of the backplane target position variable when the total displacement expression reaches the minimum value can be solved.

[0102] Control the drive motor to make the upper slider assembly move according to the upper slider displacement when the total displacement is the shortest; control the drive motor to make the lower slider assembly move according to the lower slider displacement when the total displacement is the shortest; control the drive motor to make the azimuth angle of the lower connecting rod the angle corresponding to the target position of the lower connecting rod when the total displacement is the shortest.

[0103] After controlling the positions of the upper slider assembly and the lower slider assembly, if the angles of the upper and lower connecting rods are not controlled, the angle of the back panel is still difficult to fix, and the unstable adjustment of the back panel still affects user use; therefore, while controlling the positions of the upper slider assembly and the lower slider assembly, it is also necessary to control the azimuth angle of the lower connecting rod.

[0104] Since the control is based on the displacement of the upper slider, the displacement of the lower slider and the angle of the target position of the lower link corresponding to the shortest total displacement, during the adjustment process, the displacement is minimal, the occupied space is also correspondingly minimal, and the impact on surrounding people and objects is small, thereby improving the convenience of using the vehicle seat back.

[0105] The vehicle seat system provided by the embodiment of the present application includes: a seat, a backboard, an upper slider assembly, a lower slider assembly, an upper connecting rod, a lower connecting rod, a driving motor and a controller; the upper slider assembly and the lower slider assembly are both fixed to the back of the seat; the first end of the upper connecting rod is connected to the upper slider assembly; the second end of the upper connecting rod is connected to the upper connecting rod fixing shaft of the backboard; the first end of the lower connecting rod is connected to the lower slider assembly; the second end of the lower connecting rod is connected to the lower connecting rod fixing shaft of the backboard. The controller is used to: obtain the current position of the upper connecting rod and the current position of the lower connecting rod after the back of the seat is deflected; set the backboard target position, and obtain the upper connecting rod target position and the lower connecting rod target position corresponding to the backboard target position. Under the above structure and connection relationship, since the lengths of the upper connecting rod and the lower connecting rod are fixed, and the upper slider assembly and the lower slider assembly are fixed to the backrest, the angle of the backrest will no longer change after the deflection is completed, and the upper slider assembly and the lower slider assembly slide along the straight line where the backrest is located; therefore, the corresponding upper connecting rod target position and lower connecting rod target position can be determined by setting the back plate target position. The upper slider displacement is obtained according to the current position of the upper connecting rod and the upper connecting rod target position; the lower slider displacement is obtained according to the current position of the lower connecting rod and the lower connecting rod target position; the back plate target position is adjusted so that the total displacement of the sum of the upper slider displacement and the lower slider displacement is the shortest. The drive motor is controlled to make the upper slider assembly move according to the upper slider displacement when the total displacement is the shortest; the drive motor is controlled to make the lower slider assembly move according to the lower slider displacement when the total displacement is the shortest; the drive motor is controlled to make the azimuth of the lower connecting rod be the angle corresponding to the lower connecting rod target position when the total displacement is the shortest. Controlling the position of the upper slider assembly, the position of the lower slider assembly and the connecting rod angle can ensure the stability of the adjusted back panel; controlling according to the parameters when the total displacement is the shortest, so that during the adjustment process, the displacement is minimized, the occupied space is also correspondingly minimized, and the impact on surrounding people and objects is small, thereby improving the comfort and convenience of using the vehicle seat back panel.

[0106] In some embodiments, the controller is specifically used to obtain the upper link target position and the lower link target position corresponding to the back panel target position based on the back panel target position, the deflection angle of the seat back, the length of the upper link, the length of the lower link and the back panel axis width; the back panel axis width is the width between the upper link fixed axis and the lower link fixed axis.

[0107] The following describes a specific process of obtaining the upper connecting rod target position and the lower connecting rod target position corresponding to the back plate target position through the back plate target position in conjunction with the accompanying drawings.

[0108] See also Figure 2 , which is a schematic diagram of a coordinate system for building a vehicle seat system provided in an embodiment of the present application.

[0109] The seat includes a seat back rotation axis about which the seat back rotates when deflected.

[0110] The connection point between the upper connecting rod and the upper slider assembly is the first rotation center; the connection point between the lower connecting rod and the lower slider assembly is the second rotation center.

[0111] The controller is specifically used to establish a plane rectangular coordinate system with the side of the seat as a plane and the center of the seat back rotation axis as the origin.

[0112] As a possible implementation, the seat has the function of moving forward and backward in addition to the deflection of the seat back. Figure 2 In the diagram, point O indicates the center of the seat back rotation axis before the seat is adjusted forward and backward; point O1 indicates the center of the seat back rotation axis after the seat is adjusted forward and backward. Figure 2 The coordinate system is established at point O. It should be understood that the coordinate system can also be established at point O1, and this application does not limit this.

[0113] Figure 2 In the figure, point A represents the second rotation center; point B represents the first rotation center; point C represents the fixed axis of the lower connecting rod; and point D represents the fixed axis of the upper connecting rod.

[0114] θ0 is the angle between the initial position of the seat and the y-axis, which is positive clockwise; θs is the angle between the seat and the initial position after the seat is adjusted forward and backward and the seat back is deflected, which is positive clockwise.

[0115] exist Figure 2 In the coordinate system shown, the position of the upper link can be expressed by the coordinates of the first rotation center B and the coordinates of the upper link fixed axis D; the position of the lower link can be expressed by the coordinates of the second rotation center A and the coordinates of the lower link fixed axis C; the position of the back plate can be expressed by the coordinates of the upper link fixed axis D and the coordinates of the lower link fixed axis C.

[0116] Extract the above parameters from the three-dimensional seating system, see Figure 3 , which is a schematic diagram of the various structures of a vehicle seat system provided in an embodiment of the present application in a coordinate system.

[0117] Figure 3In addition to the second rotation center point A and the first rotation center point B described above, the two parallel oblique lines represent the straight line along the seat back rotation axis (hereinafter referred to as the seat rotation axis) and the straight line where the upper slider assembly and the lower slider assembly are located. It should be understood that considering the thickness of the seat and the thickness of the slider, there is an offset d between the slider center and the seat rotation axis.

[0118] θ1, θ2, and θ3 are the azimuth angles of the lower connecting rod AC, the upper connecting rod BD, and the back plate CD, respectively, and counterclockwise is positive.

[0119] l1, l2, l3 are the back plate axis widths of the lower connecting rod AC, the upper connecting rod BD and the back plate CD respectively. The back plate axis width is the width between the upper connecting rod fixed axis and the lower connecting rod fixed axis.

[0120] x0 is the distance between point O and point O1, which is the displacement of the seat moving forward and backward.

[0121] Assume that the coordinates of the second rotation center A, the first rotation center B, the lower connecting rod fixed axis C, and the upper connecting rod fixed axis D are: A(x1, y1), B(x2, y2), C(x3, y3), and D(x4, y4).

[0122] According to the initial angle θ0 between the seat back and the coordinate axis, the deflection angle θs of the seat back, and the offset d between the center of the slider and the seat rotation axis, the first position relationship between the first rotation center B and the second rotation center A is established:

[0123] Points A and B are on the same straight line, that is:

[0124]

[0125] Where: k = cot(θ0 + θ s ), b = -cot(θ0+θ s )x0-d / sin(θ0+θ s ).

[0126] According to the length l2 of the upper link BD and the azimuth angle θ2 of the upper link BD, a second position relationship between the first rotation center B and the upper link fixed axis D is established:

[0127]

[0128] According to the length of the lower connecting rod AC and the azimuth angle θ1 of the lower connecting rod AC, a third position relationship between the second rotation center A and the lower connecting rod fixed axis C is established:

[0129]

[0130] According to the back plate axis width l3 and the azimuth angle θ3 of the back plate CD, the fourth position relationship between the upper connecting rod fixed axis D and the lower connecting rod fixed axis C is established:

[0131]

[0132] Based on the first positional relationship, the second positional relationship, the third positional relationship and the fourth positional relationship, the relationship between the coordinates of the first rotation center, the coordinates of the second rotation center and the target position of the back plate is obtained.

[0133] The combined equations (1) to (4) can be used to obtain the relationship between the direction angle θ1 of the second rotation center A, the first rotation center B and the lower connecting rod AC and the target position of the back plate, that is, the coordinate change of the upper connecting rod fixed axis D and the lower connecting rod fixed axis C:

[0134]

[0135]

[0136]

[0137] in,

[0138] On this basis, the principle of shortest total displacement is adopted to solve the values ​​of x1 and x2 when the total displacement is shortest, thereby obtaining the displacement of the upper slider and the lower slider, and the direction angle of the lower connecting rod through formula (7).

[0139] In some embodiments, in order to improve the functional diversity of the vehicle seat system, one side of the back panel is used as a small table, and the other side of the back panel is used as a display screen. Figure 4 , which is a schematic diagram of a back panel of a vehicle seat system provided in an embodiment of the present application.

[0140] Figure 4 (a) shows a schematic diagram of a back panel as one side of a small table top. 401 is a water cup groove. The two grooves on the upper side of the rectangular shape represent the connection between the first upper connecting rod and the second upper connecting rod.

[0141] Figure 4 (b) shows the other side of the back panel, that is, the side serving as a display screen, wherein 402 is the display screen.

[0142] When the back panel is used as a display screen, the controller is also used to control the lower slider assembly and the upper slider assembly so that the lower connecting rod fixed axis is higher than the upper connecting rod fixed axis.

[0143] In order to enable those skilled in the art to more intuitively understand the use of the dual-purpose back panel of the small table and the display screen provided in the embodiment of the present application, see Figure 5, this figure is a schematic diagram of switching the back panel mode of a vehicle seat system provided in an embodiment of the present application.

[0144] Starting from the initial position of the backplane, in order to prevent interference and dead points of movement, a movement method when the backplane is switched is introduced below.

[0145] Figure 5 (a) shows the initial position of the back plate. It can be seen that the upper slider and the lower slider are at their farthest positions. First, the upper slider moves downward, while the lower slider does not move, until the lower link reaches the first limit position. Figure 5 (b) As shown. Then the upper slider does not move, the lower slider moves upward, and at the same time the lower connecting rod rotates clockwise to reach the upper connecting rod limit position, as shown Figure 5 (c). Then the lower link continues to move clockwise, and the lower slider continues to move upward, making the small table horizontal and reaching the initial position of the small table. Figure 5 (d) The above process realizes the process of switching the back panel from the initial position (ie, the folded position) to the initial position of the small table.

[0146] exist Figure 5 (d) shows the initial position of the small table, the upper slider does not move, the lower slider does not move, and the lower connecting rod rotates counterclockwise to reach the second limit position of the lower connecting rod. Figure 5 (e). Then the lower link continues to rotate counterclockwise to make the display perpendicular to the ground and reach the preset display position. Figure 5 (f). Then the lower slider moves upward and the lower connecting rod rotates counterclockwise to reach the initial position of the display screen. Figure 5 (g) The above process realizes the process of switching the back panel from the initial position of the small table to the initial position of the display screen.

[0147] When returning, just return in the reverse order, returning to the initial position of the small table and the initial position of the back panel in turn. The switching process will not be repeated here.

[0148] In order to enable those skilled in the art to more intuitively understand the adjustment effect of the backplane provided in the embodiment of the present application, see Figure 6 , this figure is a schematic diagram of the adjustment of the back panel of a vehicle seat system provided in an embodiment of the present application.

[0149] After solving the corresponding upper slider displacement, lower slider displacement and lower connecting rod direction angle according to the principle of shortest total displacement in the above process, when the seat posture changes, the seat back can keep the small table level and at an unchanged height based on the above data.

[0150] Figure 6 (a) Adjust the position of the small table in front of the seat; Figure 6 (b) indicates the position of the seat and tray table when the seat back is tilted back 10 degrees but adaptive adjustment is not performed; Figure 6(c) Indicates the position of the seat and small table after the seat back is tilted back 10 degrees and adaptive adjustment is performed.

[0151] Similarly, Figure 6 (d) shows the position of the display screen before seat adjustment; Figure 6 (e) indicates the position of the seat and display screen when the seat back is tilted back 10 degrees but adaptive adjustment is not performed; Figure 6 (f) indicates the position of the seat and display screen after the seat back is tilted back 10 degrees and adaptive adjustment is performed.

[0152] It can be seen that the vehicle seat system provided in the embodiment of the present application can flexibly and automatically adjust the angle and position of the back panel when the seat back is deflected. Whether it is used as a small table or as a display screen, it can be easily adjusted to bring a more comfortable experience to the user.

[0153] In some embodiments, in order to facilitate the control of the upper slider assembly, the lower slider assembly and the direction angle of the lower connecting rod, three drive motors are correspondingly provided to control them separately, and the functions are simple and easy to implement. The drive motors specifically include: a first drive motor, a second drive motor and a third drive motor.

[0154] The first drive motor is used to control the displacement of the first lower slider assembly; the second drive motor is used to control the azimuth angle of the lower connecting rod; and the third drive motor is used to control the displacement of the first upper slider assembly.

[0155] The possible specific structures of the upper slider assembly and the lower slider assembly provided in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0156] by Figure 1 As the overall structure of the vehicle seat system, the specific structure of the first lower slider assembly is introduced below. Figure 7 , which is a schematic diagram of a first lower slider assembly provided in an embodiment of the present application.

[0157] The first lower slider assembly specifically includes: a lower slider shaft 701 , a first bearing 702 , a second bearing 703 , a lower slider gear 704 , a lower slider rack 705 , a first lower slider 706 and a first lower slider guide rail 707 .

[0158] like Figure 7 (a) and Figure 7 (b), the first driving motor 610 is connected to the lower slider shaft 701 by a key 711. Figure 7 (c) The lower slider shaft 701 and the lower slider gear 704 are connected by a key 712.

[0159] Under the above connection relationship, the rotation of the first driving motor 610 can drive the lower slider gear 704 to rotate on the lower slider rack 705 through the lower slider shaft 701 .

[0160] like Figure 7 (b), the lower slider shaft 701 is connected to the first lower connecting rod 1061 through the first bearing 702; Figure 7 (d) and Figure 7 (e) The lower slider shaft 701 is connected to the first lower slider 706 via the second bearing 703, thereby keeping the lower slider gear 704 and the first lower slider 706 displaced in the same direction.

[0161] like Figure 7 (e) The first lower slider 706 is connected to the first lower slider guide rail 707 by a moving pair. The first lower slider guide rail 707, the lower slider rack 705 and the seat are fixedly connected.

[0162] Under the above-mentioned structure and connection relationship of the first lower slider assembly, the first drive motor 610 can rotate to drive the gear to move on the rack, and the rack and the lower slider both move on the lower slider guide rail. Therefore, the first drive motor 610 can control the displacement of the first lower slider assembly.

[0163] See also Figure 8 , which is a schematic diagram of a second lower slider assembly provided in an embodiment of the present application.

[0164] The second lower slider assembly specifically includes: a lower connecting rod shaft 801 , a third bearing 802 , a second lower slider 803 and a second lower slider guide rail 804 .

[0165] like Figure 8 (a), the second driving motor 620 is connected to the lower connecting rod shaft 801 by a key; the lower connecting rod shaft 801 is connected to the second lower connecting rod 1062 by a key.

[0166] Under the above connection relationship, the rotation of the second driving motor 620 can drive the rotation of the second lower connecting rod 1062. Therefore, the second driving motor 620 can control the azimuth angle of the second lower connecting rod.

[0167] like Figure 8 (b), the lower connecting rod shaft 801 is connected to the second lower slide block 803 through the third bearing 802; Figure 8 (c) The second lower slider 803 and the second lower slider guide rail 804 are connected by a moving pair; the second lower slider guide rail 804 and the seat are fixedly connected.

[0168] Under the above connection relationship, the second lower slider 803 can produce synchronous displacement with the first lower slider 706 under the action of the first lower connecting rod, the second lower connecting rod and the lower connecting rod fixed axis; similarly, the first lower connecting rod 1061 also produces synchronous azimuthal rotation with the second lower connecting rod 1062 under the action of the lower connecting rod fixed axis.

[0169] Figure 7 and Figure 8 The invention discloses a possible lower slider structure and connection relationship when a driving motor controls the lower slider assembly and the lower connecting rod. The third driving motor controls the displacement of the first upper slider assembly, and its principle is similar to that of the first driving motor controlling the displacement of the first lower slider assembly.

[0170] See also Fig. 9 , which is a schematic diagram of a first upper slider assembly provided in an embodiment of the present application.

[0171] The first upper slider assembly specifically includes: a first upper connecting rod shaft 901 , a fourth bearing 902 , a fifth bearing 903 , an upper slider gear 904 , an upper slider rack 905 , an upper slider 906 and a first upper slider guide rail 907 .

[0172] like Fig. 9 (a) and Fig. 9 (b) The third driving motor 630 is connected to the first upper connecting rod shaft 901 by a key. The first upper connecting rod shaft 901 is connected to the upper slider gear 904 by a key.

[0173] like Fig. 9 (a), the first upper connecting rod shaft 901 is connected to the first upper connecting rod 1051 through the fourth bearing 902; Fig. 9 (c) The first upper slider 906 is connected to the first upper connecting rod shaft 901 via the fifth bearing 903, thereby keeping the upper slider gear 904 and the first upper slider 906 displaced in the same direction.

[0174] like Fig. 9 (d) The first upper slider 906 is connected to the first upper slider guide rail 907 by a moving pair. The first upper slider guide rail 907, the upper slider rack 905 and the seat are fixedly connected.

[0175] See also Fig.10 , which is a schematic diagram of a second upper slider assembly provided in an embodiment of the present application.

[0176] The second upper slider assembly specifically includes: a second upper slider 1001 , a sixth bearing 1002 , and a second upper slider guide rail 1003 .

[0177] like Fig.10 (a), the second upper slider 1001 is connected to the second upper connecting rod 1052 through the sixth bearing 1002.

[0178] like Fig.10 (b) The second upper slider 1001 and the second upper slider guide rail 1003 are connected by a movable pair; the second upper slider guide rail 1003 is fixedly connected to the seat.

[0179] The second upper slider 1001 can generate synchronous displacement with the first upper slider 906 under the action of the first upper link, the second upper link and the upper link fixed shaft.

[0180] When the position of the upper slider assembly, the position of the lower slider assembly and the direction angle of the lower connecting rod are fixed, the direction angle of the upper connecting rod will also be fixed; therefore, there is no need to control the direction angle of the upper connecting rod separately.

[0181] Based on the vehicle seat system provided in the above embodiments, the embodiments of the present application also provide a method for adjusting a vehicle seat back panel, which is described in detail below in conjunction with the accompanying drawings.

[0182] See also Fig.11 , which is a flow chart of a method for adjusting a vehicle seat back panel provided in an embodiment of the present application.

[0183] The vehicle seat back adjustment method provided in the embodiment of the present application is applied to the vehicle seat system introduced in the above embodiment.

[0184] The adjustment methods of the vehicle seat back include:

[0185] S1101: After the seat back is deflected, the current position of the upper link and the current position of the lower link are obtained.

[0186] S1102: Set the back plate target position, and obtain the upper connecting rod target position and the lower connecting rod target position corresponding to the back plate target position.

[0187] Since the lengths of the upper connecting rod and the lower connecting rod are fixed, and the upper slider assembly and the lower slider assembly are fixed to the seat back, the angle of the seat back no longer changes after the deflection is completed, and the upper slider assembly and the lower slider assembly slide along the straight line where the seat back is located; therefore, the corresponding upper connecting rod target position and lower connecting rod target position can be determined by setting the back plate target position.

[0188] S1103: Obtain the displacement of the upper slider according to the current position of the upper link and the target position of the upper link; obtain the displacement of the lower slider according to the current position of the lower link and the target position of the lower link.

[0189] S1104: Adjust the target position of the back plate so that the total displacement of the sum of the displacement of the upper slider and the displacement of the lower slider is the shortest.

[0190] S1105: Control the upper slider assembly to move according to the upper slider displacement when the total displacement is the shortest; control the lower slider assembly to move according to the lower slider displacement when the total displacement is the shortest; control the azimuth angle of the lower connecting rod to be the angle corresponding to the target position of the lower connecting rod when the total displacement is the shortest.

[0191] Since the adjustment is performed according to the angle of the upper slider displacement, the lower slider displacement and the target position of the lower connecting rod corresponding to the shortest total displacement, the displacement is minimized during the adjustment process, the occupied space is also minimized, and the impact on surrounding people and objects is small, thereby improving the comfort and convenience of using the vehicle seat back.

[0192] In some embodiments, step S1102 may be implemented as follows:

[0193] S1121: Set the backplane target position;

[0194] S1122: According to the backboard target position, the deflection angle of the seat back, the length of the upper link, the length of the lower link and the backboard axis width, the upper link target position and the lower link target position corresponding to the backboard target position are obtained; the backboard axis width is the width between the upper link fixed axis and the lower link fixed axis.

[0195] In some embodiments, the seat includes a seat back rotation axis; the connection between the upper connecting rod and the upper slider assembly is the first rotation center; the connection between the lower connecting rod and the lower slider assembly is the second rotation center; then the positions of the upper connecting rod, the lower connecting rod and the back plate can be expressed as follows:

[0196] Take the side of the seat as the plane and the center of the seat back rotation axis as the origin to establish a plane rectangular coordinate system;

[0197] In the coordinate system, the position of the upper link is represented by the coordinates of the first rotation center and the coordinates of the fixed axis of the upper link; the position of the lower link is represented by the coordinates of the second rotation center and the coordinates of the fixed axis of the lower link; the position of the back plate is represented by the coordinates of the fixed axis of the upper link and the coordinates of the fixed axis of the lower link.

[0198] When the coordinate system is used to represent the position of each structure, further, step S1122 can be implemented in the following manner:

[0199] S1201: establishing a first positional relationship between a first rotation center and a second rotation center according to an initial angle between the seat back and the coordinate axis, a deflection angle of the seat back, and an offset between a center of a slider and a rotation axis of the seat;

[0200] S1202: establishing a second position relationship between the first rotation center and the fixed axis of the upper link according to the length of the upper link and the azimuth angle of the upper link;

[0201] S1203: establishing a third position relationship between the second rotation center and the fixed axis of the lower link according to the length of the lower link and the azimuth angle of the lower link;

[0202] S1204: establishing a fourth position relationship between the upper connecting rod fixed axis and the lower connecting rod fixed axis according to the back plate axis width and the azimuth angle of the back plate;

[0203] S1205: Based on the first positional relationship, the second positional relationship, the third positional relationship and the fourth positional relationship, obtain the relationship between the coordinates of the first rotation center, the coordinates of the second rotation center and the target position of the back plate.

[0204] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0205] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A vehicle seat system, characterized in that: include: Seat, back panel, upper slider assembly, lower slider assembly, upper connecting rod, lower connecting rod, drive motor and controller; The upper slider assembly and the lower slider assembly are both fixed to the backrest of the seat; The first end of the upper connecting rod is connected to the upper slider assembly; the second end of the upper connecting rod is connected to the upper connecting rod fixing shaft of the back plate; The first end of the lower connecting rod is connected to the lower slider assembly; the second end of the lower connecting rod is connected to the lower connecting rod fixing shaft of the back plate; The controller is used to: After the seat back is deflected, obtaining the current position of the upper connecting rod and the current position of the lower connecting rod; Setting a back plate target position, and obtaining an upper connecting rod target position and a lower connecting rod target position corresponding to the back plate target position; Obtaining the displacement of the upper slider according to the current position of the upper connecting rod and the target position of the upper connecting rod; Obtaining the displacement of the lower slider according to the current position of the lower connecting rod and the target position of the lower connecting rod; Adjusting the target position of the back plate so that the total displacement of the upper slider and the lower slider is the shortest; Controlling the driving motor to move the upper slider assembly according to the upper slider displacement when the total displacement is the shortest; Controlling the driving motor to move the lower slider assembly according to the displacement of the lower slider when the total displacement is the shortest; The driving motor is controlled so that the azimuth angle of the lower link is the angle corresponding to the target position of the lower link when the total displacement is the shortest.

2. The system according to claim 1, characterized in that The controller is specifically used to obtain the upper connecting rod target position and the lower connecting rod target position corresponding to the back panel target position according to the back panel target position, the deflection angle of the chair back, the length of the upper connecting rod, the length of the lower connecting rod and the back panel axis width; the back panel axis width is the width between the upper connecting rod fixed axis and the lower connecting rod fixed axis.

3. The system according to claim 2, characterized in that The seat includes a seat back rotation axis; the connection between the upper connecting rod and the upper slider assembly is the first rotation center; the connection between the lower connecting rod and the lower slider assembly is the second rotation center; The controller is specifically used for: Taking the side surface of the seat as a plane and the center of the seat back rotation axis as the origin, a plane rectangular coordinate system is established; In the coordinate system, the position of the upper link is represented by the coordinates of the first rotation center and the coordinates of the upper link fixed axis; the position of the lower link is represented by the coordinates of the second rotation center and the coordinates of the lower link fixed axis; the position of the back plate is represented by the coordinates of the upper link fixed axis and the coordinates of the lower link fixed axis.

4. The system according to claim 3, characterized in that The controller is specifically used for: Establishing a first positional relationship between the first rotation center and the second rotation center according to an initial angle between the seat back and the coordinate axis, a deflection angle of the seat back, and an offset between a center of a slider and a rotation axis of the seat; Establishing a second positional relationship between the first rotation center and the fixed axis of the upper link according to the length of the upper link and the azimuth angle of the upper link; Establishing a third positional relationship between the second rotation center and the fixed axis of the lower connecting rod according to the length of the lower connecting rod and the azimuth angle of the lower connecting rod; Establishing a fourth positional relationship between the upper connecting rod fixed axis and the lower connecting rod fixed axis according to the back plate axis width and the azimuth angle of the back plate; Based on the first positional relationship, the second positional relationship, the third positional relationship, and the fourth positional relationship, a relationship between the coordinates of the first rotation center, the coordinates of the second rotation center, and the back plate target position is obtained.

5. The system according to any one of claims 1 to 4, characterized in that: One side of the back panel is used as a small table top; the other side of the back panel is used as a display screen; When the back panel is used as a display screen, the controller is further used to control the lower slider assembly and the upper slider assembly so that the lower connecting rod fixed axis is higher than the upper connecting rod fixed axis.

6. The system according to any one of claims 1 to 4, characterized in that: The upper slider assembly specifically includes a first upper slider assembly and a second upper slider assembly; the lower slider assembly specifically includes a first lower slider assembly and a second lower slider assembly; the upper connecting rod specifically includes a first upper connecting rod and a second upper connecting rod; the lower connecting rod specifically includes a first lower connecting rod and a second lower connecting rod; The drive motor specifically includes: a first drive motor, a second drive motor and a third drive motor; The first upper slider assembly, the second upper slider assembly, the first lower slider assembly and the second lower slider assembly are all fixed to the backrest of the seat; The first end of the first upper connecting rod is connected to the first upper slider assembly, and the second end of the first upper connecting rod is connected to the first end of the upper connecting rod fixed shaft; The first end of the second upper connecting rod is connected to the second upper sliding block assembly, and the second end of the second upper connecting rod is connected to the second end of the upper connecting rod fixed shaft; The first end of the first lower connecting rod is connected to the first lower sliding block assembly, and the second end of the first lower connecting rod is connected to the first end of the lower connecting rod fixed shaft; The first end of the second lower connecting rod is connected to the second lower sliding block assembly, and the second end of the second lower connecting rod is connected to the second end of the lower connecting rod fixed shaft; The first drive motor is used to control the displacement of the first lower slider assembly; the second drive motor is used to control the azimuth angle of the lower connecting rod; and the third drive motor is used to control the displacement of the first upper slider assembly.

7. The system according to claim 6, characterized in that The first lower slider assembly specifically includes: a lower slider shaft, a first bearing, a second bearing, a lower slider gear, a lower slider rack, a first lower slider and a first lower slider guide rail; The first driving motor is connected to the lower slider shaft by a key; the lower slider shaft is connected to the lower slider gear by a key; The lower slider shaft is connected to the first lower connecting rod through the first bearing; the lower slider shaft is connected to the first lower slider through the second bearing; the first lower slider and the first lower slider guide rail are connected by a moving pair; the first lower slider guide rail, the lower slider rack and the seat are fixedly connected.

8. The system according to claim 6, characterized in that The second lower slider assembly specifically includes: a lower connecting rod shaft, a third bearing, a second lower slider, and a second lower slider guide rail; The second driving motor is connected to the lower connecting rod shaft by a key; the lower connecting rod shaft is connected to the second lower connecting rod by a key; The lower connecting rod shaft is connected to the second lower slider through the third bearing; the second lower slider and the second lower slider guide rail are connected by a moving pair; the second lower slider guide rail and the seat are fixedly connected.

9. A method for adjusting a vehicle seat back panel, characterized in that: Applied to a vehicle seat system, the system comprising: a seat, a back panel, an upper slider assembly, a lower slider assembly, an upper connecting rod, a lower connecting rod, a drive motor and a controller; The upper slider assembly and the lower slider assembly are both fixed to the backrest of the seat; The first end of the upper connecting rod is connected to the upper slider assembly; the second end of the upper connecting rod is connected to the upper connecting rod fixing shaft of the back plate; The first end of the lower connecting rod is connected to the lower slider assembly; the second end of the lower connecting rod is connected to the lower connecting rod fixing shaft of the back plate; The method comprises: After the seat back is deflected, obtaining the current position of the upper connecting rod and the current position of the lower connecting rod; Setting a back plate target position, and obtaining an upper connecting rod target position and a lower connecting rod target position corresponding to the back plate target position; The displacement of the upper slider is obtained according to the current position of the upper link and the target position of the upper link; the displacement of the lower slider is obtained according to the current position of the lower link and the target position of the lower link; Adjusting the target position of the back plate so that the total displacement of the upper slider and the lower slider is the shortest; The upper slider assembly is controlled to move according to the upper slider displacement when the total displacement is the shortest; the lower slider assembly is controlled to move according to the lower slider displacement when the total displacement is the shortest; and the azimuth angle of the lower connecting rod is controlled to be the angle corresponding to the target position of the lower connecting rod when the total displacement is the shortest.

10. The method according to claim 9, characterized in that The obtaining of the upper connecting rod target position and the lower connecting rod target position corresponding to the back plate target position specifically includes: According to the back panel target position, the deflection angle of the chair back, the length of the upper connecting rod, the length of the lower connecting rod and the back panel axis width, the upper connecting rod target position and the lower connecting rod target position corresponding to the back panel target position are obtained; the back panel axis width is the width between the upper connecting rod fixed axis and the lower connecting rod fixed axis.

11. The method according to claim 10, characterized in that The seat includes a seat back rotation axis; the connection between the upper connecting rod and the upper slider assembly is the first rotation center; the connection between the lower connecting rod and the lower slider assembly is the second rotation center; The positions of the upper connecting rod, the lower connecting rod and the back plate are expressed as follows: Taking the side surface of the seat as a plane and the center of the seat back rotation axis as the origin, a plane rectangular coordinate system is established; In the coordinate system, the position of the upper link is represented by the coordinates of the first rotation center and the coordinates of the upper link fixed axis; the position of the lower link is represented by the coordinates of the second rotation center and the coordinates of the lower link fixed axis; the position of the back plate is represented by the coordinates of the upper link fixed axis and the coordinates of the lower link fixed axis.

12. The method according to claim 11, characterized in that The obtaining of the upper connecting rod target position and the lower connecting rod target position corresponding to the back plate target position specifically includes: Establishing a first positional relationship between the first rotation center and the second rotation center according to an initial angle between the seat back and the coordinate axis, a deflection angle of the seat back, and an offset between a center of a slider and a rotation axis of the seat; Establishing a second positional relationship between the first rotation center and the fixed axis of the upper link according to the length of the upper link and the azimuth angle of the upper link; Establishing a third positional relationship between the second rotation center and the fixed axis of the lower connecting rod according to the length of the lower connecting rod and the azimuth angle of the lower connecting rod; Establishing a fourth positional relationship between the upper connecting rod fixed axis and the lower connecting rod fixed axis according to the back plate axis width and the azimuth angle of the back plate; Based on the first positional relationship, the second positional relationship, the third positional relationship, and the fourth positional relationship, a relationship between the coordinates of the first rotation center, the coordinates of the second rotation center, and the back plate target position is obtained.

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