Intelligent control method for automobile seat and automobile seat

Abstract

The invention discloses an intelligent control method for an automobile seat and the automobile seat, the seat is arranged at an automobile driving position, and the method comprises the following steps: establishing a plane coordinate system by taking an electric switch / brake as an original point, taking the length direction of an automobile body as a transverse axis and taking the height direction of the automobile body as a longitudinal axis, and selecting one point on the seat as a seat moving original point; obtaining a movable adjustment area of the seat movement origin under the plane coordinate system; the shank length of the user is obtained, a circle is drawn with the original point as the circle center and the shank length of the user as the radius, and an arc segment intersecting with the movable adjusting area is obtained; one point on the arc-shaped section is selected as a position point after the seat is adjusted, and after the position point is compared with a seat movement original point, adjusting parameters of the seat at the height position and the front-back position are obtained; after the shank length of the user is obtained, the adjusting parameters of the seat in the height position and the front-back position when the user is in the comfortable seat posture can be obtained, so that the user is in the seat posture of the optimal driving position, driving fatigue is relieved, and the use satisfaction degree of the user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to an intelligent control method for an automotive seat and an automotive seat. Background Art

[0002] Automotive seats play a crucial role in ensuring driving safety and comfort. An uncomfortable seat posture not only brings a very poor driving experience to the driver, but also greatly increases the fatigue of the human body during long-term driving, seriously affecting driving safety. Nowadays, automotive seats are gradually developing towards the intelligent direction. By integrating sensors, artificial intelligence algorithms, and big data technologies, the seats can achieve automatic adjustment and memory functions, and can be adjusted according to the personalized needs of users. At present, the adjustment of automotive seats mainly includes adjustable tilt angles, seat heights, and seat front-back distances to accommodate passengers of different body sizes and preferences.

[0003] However, the existing seat adjustment technologies mainly rely on manual adjustment by the driver or adjustment through several preset fixed modes. At the same time, the adjustment of the seat only includes aspects such as the tilt angle of the backrest, seat height, and seat front-back distance. For drivers with different body characteristics, the above adjustment methods cannot ensure that the adjustment needs of everyone are met. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide an intelligent control method for an automotive seat and an automotive seat, which can obtain the calf length of the user, and obtain the adjustment parameters of the seat in the vehicle body height direction and vehicle body length direction when the user is in a comfortable seat posture according to the calf length, so that the user is in the optimal driving position seat posture after the seat is adjusted, so as to relieve driving fatigue and improve user satisfaction.

[0005] An adjustable seat intelligent control method provided by the present invention, the seat is arranged at the driver's position of the vehicle, and includes the following steps:

[0006] S1. Taking the ignition switch / brake as the origin, the vehicle body length direction as the horizontal axis, and the vehicle body height direction as the vertical axis to establish a plane coordinate system, selecting a point on the seat as the initial seat movement point, and determining the movable adjustment area of the initial seat movement point in the plane coordinate system;

[0007] S2. Obtaining the calf length of the user, and drawing a circle in the plane coordinate system with the origin as the center and the calf length of the user as the radius, and obtaining the arc segment where the circle intersects the movable adjustment area; selecting a point on the arc segment as the seat position point after adjustment, and comparing it with the initial seat movement point to obtain the adjustment parameters of the seat in the plane coordinate system.

[0008] Further, select a point on the seat as the initial seat movement point, and determine the movable adjustment area of the initial seat movement point in the plane coordinate system, which specifically includes: Set the end of the seat cushion closest to the origin on the seat as the initial seat movement point P, and obtain a rectangular movable adjustment area of the initial seat movement point P with the adjustable length in the vehicle body length direction and the adjustable height in the vehicle body height direction in the plane coordinate system for the seat;

[0009] Among them, the coordinates of each endpoint in the movable adjustment area are P1, P2, P3, and P4, where P4 is the endpoint closest to the origin, P1 is the endpoint directly above P4, P3 is the endpoint directly behind P4, and P2 is the endpoint farthest from the origin.

[0010] Further, the following steps are also included:

[0011] S3. Collect the user's body data and the actual comfort state value in the current sitting posture, and determine the standard comfort state value corresponding to the user's comfortable sitting posture according to the user's body data;

[0012] S4. Compare the actual comfort state value with the standard comfort state value, and adjust the seat posture according to the comparison result until the user is in a comfortable sitting posture.

[0013] Further, determining the standard comfort state value corresponding to the user's comfortable sitting posture according to the user's body data specifically includes:

[0014] Collect the user's height and gender data, and determine at least one of the comfortable thigh blood pressure, the reference comfortable pressure of the backrest waist, and the comfortable pressure of the headrest corresponding to the user's comfortable sitting posture according to the user's height and gender data.

[0015] Further, comparing the actual comfort state value with the standard comfort state value, and adjusting the seat posture according to the comparison result until the user is in a comfortable sitting posture, specifically includes:

[0016] Compare the thigh blood pressure of the user in the current sitting posture collected with the comfortable thigh blood pressure corresponding to the user's comfortable sitting posture, and / or compare the backrest waist pressure of the user in the current sitting posture collected with the reference comfortable pressure of the backrest waist corresponding to the user's comfortable sitting posture, and / or compare the headrest pressure of the user in the current sitting posture collected with the comfortable pressure of the headrest corresponding to the user's comfortable sitting posture, and adjust the seat posture according to the comparison result until the user is in a comfortable sitting posture.

[0017] Further, the adjusting the seat posture according to the comparison result until the user is in a comfortable sitting posture specifically includes:

[0018] According to the comparison result, confirm the comfortable width value of the seat cushion and adjust the seat cushion;

[0019] After the adjustment, continue to collect the actual comfort state value of the user and compare the actual comfort state value with the standard comfort state value to determine whether further adjustment is needed until the user is in a comfortable sitting position.

[0020] There is also provided an automobile seat that executes the intelligent control method of the automobile seat. A seat adjustment device for adjusting the seat posture is provided inside the seat. The seat adjustment device includes a detection device for collecting the human body data of the user sitting on the seat and a driving device for driving the change of the seat posture. The detection device is electrically connected to the driving device.

[0021] Furthermore, the seat includes a seat pan frame, and the seat pan frame includes a seat pan base, a seat pan bracket movably arranged on the seat pan base, and a seat pan skeleton arranged on the seat pan bracket. The seat pan skeleton includes at least a pair of seat pan sub-skeletons arranged side by side. Adjacent seat pan sub-skeletons can be driven to slide towards or away from each other in the vehicle body width direction to adjust the overall width of the seat pan skeleton.

[0022] Furthermore, the driving device includes a first driving device for driving the sliding of the seat pan sub-skeleton. The first driving device includes a first slide rail mechanism arranged between the seat pan sub-skeleton and the seat pan bracket and a driving member for driving the seat pan sub-skeleton to slide on the first slide rail mechanism. The fixed end of the driving member is arranged on the seat pan bracket, and the acting end of the driving member is fixedly connected to the seat pan sub-skeleton;

[0023] There is also a second driving device arranged between the seat pan base and the seat pan bracket. The second driving device includes a second slide rail mechanism arranged on the seat pan base and a first lifting mechanism arranged on the second slide rail mechanism. The first lifting mechanism is used to adjust the height position of the seat pan skeleton in the vehicle body height direction, and the second slide rail mechanism is used to adjust the front-back position of the seat pan skeleton in the vehicle body length direction;

[0024] There is also a backrest frame installed on the seat pan bracket. A third driving device is arranged between the lower end of the backrest frame and the seat pan bracket. The third driving device includes a second lifting mechanism arranged on the seat pan bracket and a rotating mechanism arranged at the movable end of the second lifting mechanism for adjusting the angle of the backrest frame.

[0025] Furthermore, there is also a headrest skeleton installed at the upper end of the backrest frame. A third lifting mechanism is arranged between the backrest frame and the headrest skeleton. The third lifting mechanism is used to make the headrest skeleton slide with a single degree of freedom to change the height position of the headrest skeleton in the vehicle body height direction;

[0026] The backrest frame and the headrest skeleton are both foamed to form a filling layer. A cavity is provided on the user side of the filling layer, and an airbag assembly for changing the profile of the backrest filling layer or the headrest filling layer is provided in the cavity.

[0027] The present invention has the following beneficial effects:

[0028] (1) The intelligent control method of the vehicle seat of the present invention can obtain the calf length of the user, and obtain the adjustment parameters of the seat in the vehicle body height direction and the vehicle body length direction in the comfortable seat posture according to the calf length, so that the user is in the seat posture of the optimal driving position, so as to relieve driving fatigue and improve user satisfaction.

[0029] (2) The intelligent control method of the vehicle seat of the present invention can collect the human body data of the user through the vehicle body camera and the sensors on the seat, and obtain the standard comfort state value of the user on the seat from the preset reference value database in the vehicle control unit, and the vehicle control unit sends adjustment signals to each adjustment structure in the seat to adjust parameters such as the width and height of the seat cushion, the front and rear positions of the seat cushion, the height and angle of the backrest, the height of the headrest, the profile of the backrest and the profile of the headrest, so that the user can feel the optimal riding comfort;

[0030] (3) The airbag assembly in the foamed filling layer on the seat backrest frame of the present invention can accurately adjust the curved surface in contact with the human waist, increase the contact surface, improve the fitting degree, reduce the waist pressure, make the waist force evenly, and thus improve the waist comfort;

[0031] (4) The height of the seat backrest frame of the present invention is adjustable, realizing more seat backrest heights of different sizes, adapting to a wider range of people, and the height of the backrest frame is mainly electrically adjusted according to the detection result of the vehicle control unit, which is more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below with reference to the drawings and embodiments:

[0033] Figure 1 It is a schematic structural diagram of the adjustable seat in the present invention;

[0034] Figure 2 It is an exploded view of the structure of the seat pan assembly in the present invention;

[0035] Figure 3 It is an exploded view of the structure of the seat pan frame in the present invention;

[0036] Figure 4 It is a schematic structural diagram of the seat pan bracket in the present invention;

[0037] Figure 5 It is an exploded view of the structure of the backrest assembly in the present invention;

[0038] Figure 6 This is an exploded view of the structure of the backrest frame in the present invention;

[0039] Figure 7 This is an exploded view of the structure of the second lifting mechanism in the present invention;

[0040] Figure 8 This is a schematic diagram of the structure of the independent airbag in the present invention;

[0041] Figure 9 This is a schematic diagram of the structure of the headrest in the present invention;

[0042] Figure 10 This is a schematic diagram of the seat height and seat front - rear adjustment in the present invention;

[0043] Among them, the reference numerals are: 1 - seat pan assembly; 2 - backrest assembly; 3 - headrest; 4 - independent airbag; 101 - seat cushion skin; 102 - elastic fabric; 103 - seat cushion foam filling layer; 104 - first infrared detector; 105 - seat pan frame; 106 - intermediate airbag; 107 - intermediate airbag air inlet part; 108 - intermediate airbag air outlet part; 109 - seat pan sub - frame; 110 - first slide rail mechanism; 111 - seat pan bracket; 112 - seat pan pressure sensor; 113 - air spring; 114 - guide rod mechanism; 115 - second slide rail mechanism; 116 - seat pan base; 117 - slide rail electric device; 118 - height sensor; 119 - first drive mechanism electric strut; 120 - cover plate; 201 - backrest skin; 202 - backrest foam filling layer; 203 - backrest airbag; 204 - backrest frame; 205 - fourth infrared detector; 206 - third lifting mechanism electric strut; 207 - third lifting mechanism guide sleeve; 208 - rotating mechanism; 209 - rotating motor; 210 - backrest spline shaft clamping plate; 211 - second lifting mechanism; 212 - second lifting mechanism guide post; 213 - O - ring seal; 214 - second lifting mechanism guide sleeve; 215 - self - lubricating bushing; 216 - electric strut retaining ring; 217 - second lifting mechanism electric strut; 301 - headrest skin; 302 - headrest foam filling layer; 303 - third infrared detector; 304 - headrest airbag; 305 - headrest frame; 401 - airbag pressure sensor; 402 - solenoid valve (intake); 403 - solenoid valve (exhaust); 404 - air pipe. Detailed implementation manners

[0044] As Figure 10 shown, in this embodiment, an intelligent control method for an adjustable seat is further provided. The seat is arranged at the driver's seat of an automobile and includes the following steps:

[0045] S1. Taking the throttle / brake as the origin, the vehicle body length direction as the horizontal axis, and the vehicle body height direction as the vertical axis, establish a plane coordinate system. Select a point on the seat as the initial seat movement point, and determine the movable adjustment area of the initial seat movement point in the plane coordinate system;

[0046] S2. Obtain the user's calf length, draw a circle in the plane coordinate system with the origin as the center and the user's calf length as the radius, and obtain the arc segment where the circle intersects the movable adjustment area; Select a point on the arc segment as the adjusted seat position point, and compare it with the initial seat movement point to obtain the adjustment parameters of the seat in the plane coordinate system.

[0047] In this embodiment, step S1 specifically includes:

[0048] S11. Taking the throttle / brake as the origin O, the vehicle body length direction as the X-axis, and the vehicle body height direction as the Z-axis, establish a plane coordinate system XOZ;

[0049] S12. Select the end of the seat cushion closest to the origin 0 as the initial seat movement point P. Taking the adjustable distance of the seat in the vehicle body length direction and the adjustable height in the vehicle body height direction as the range, obtain a rectangular movable area of the initial seat movement point P. At this time, the coordinates of each end point in the movable area of the initial seat movement point P are P1(X1, Z2), P2(X2, Z2), P3(Z2, Z1), and P4(X1, z1), where P4 is the end point closest to the origin O, P1 is the end point directly above P4, P3 is the end point directly behind P4, and P2 is the end point farthest from the origin O;

[0050] Step S2 specifically includes:

[0051] S21. Draw a circle with the user's calf length L as the radius to obtain the intersection points where it intersects the movable area of the initial seat movement point P and the intersection points and the arc segment AB within the movable area of the initial seat movement point P. At this time, the arc segment AB is the adjustment range of the initial seat movement point P when the user is in a comfortable state. The user can perform corresponding adjustments on the seat movement point P through the vehicle control unit; it is necessary to ensure that L 2 - Z2 2 ≥0, L 2 - Z1 2 ≥0;

[0052] S22. Select a point on the arc segment AB as the position M where the seat should be adjusted. The coordinates of M can be determined by the following formula:

[0053]

[0054] In formula (1), is the vector from the origin to point A, is the vector from the origin to point B, is the modulus of, is the unit vector from the origin to point M, and L is the length of the user's calf;

[0055] S23, the adjustable length ΔX of the seat in the vehicle body length direction and the adjustable height ΔZ in the vehicle body height direction are obtained by the following formula:

[0056]

[0057] In formula (2), (X P , Z P ) is the coordinate of point P at the initial position of the seat; (X M , Z M ) is the coordinate of point M at the position where the seat should be adjusted; Subsequently, the seat is adjusted to the target position according to ΔX and ΔZ.

[0058] In this embodiment, the following steps are further included:

[0059] S3. Collect the user's body data and the actual comfort state value in the current sitting posture, and obtain the standard comfort state value of the user on the seat from the preset reference value database in the vehicle controller according to the body data;

[0060] S4. Compare the actual comfort state value with the standard comfort state value, and adjust the seat posture according to the comparison result until the user is in a comfortable sitting posture.

[0061] Among them, in S3, it specifically includes: collecting the user's body data through the vehicle body camera and sensors and identifying the user's gender. The user's body data includes physiological data (height, weight, etc.), health data (blood pressure, blood oxygen saturation, etc.), biometric data (fingerprint, DNA information, etc.), etc. In this embodiment, it mainly refers to the height value and weight value in the user's physiological data. The height value can be obtained by calculating the length of the user's arm through the vehicle body camera, and the weight value can be obtained by collecting through the sensor set on the seat and then calculating. Subsequently, the standard comfort state value of the current user is determined in the reference value database preset in the vehicle controller through the user's gender, height value and weight value. The standard comfort state value includes the comfortable blood pressure Pr of the thigh corresponding to the comfortable sitting posture of the driver, the reference comfortable pressure Pr back of the lumbar part of the backrest and the comfortable pressure Pr head of the headrest;

[0062] In step S4, the actual comfort state value of the driver is the current thigh pressure Pn, the pressure PC back in the backrest airbag and the pressure PC head in the headrest airbag corresponding to the current sitting posture of the driver., which can be monitored by sensors that can usually be arranged on the seat and sent to the vehicle controller. The actual comfort state value is compared with the standard comfort state value, and it is judged whether the seat in the current seat posture needs to be adjusted according to the comparison result. After the adjustment is completed, the user is in a comfortable sitting posture.

[0063] Therefore, this solution can detect the user's body data through the vehicle body camera and various sensors on the seat, obtain the standard comfort state value of the user on the seat from the preset reference value database in the vehicle controller, and the vehicle controller sends adjustment signals to each adjustment structure in the seat to adjust parameters such as the width and height of the seat cushion, the front and rear positions of the seat cushion, the height and angle of the backrest, the height of the headrest, the profile of the backrest, and the profile of the headrest, so that the driver can feel the optimal riding comfort.

[0064] In step 3 of this embodiment, the vehicle body camera can identify the gender of the user and detect the arm length of the user. Generally, the height value h of the human body is twice the arm length, so the height value h of the user can be indirectly obtained; the weight value of the user can obtain the corresponding riding pressure value through the seat pan pressure sensor 112 arranged on the seat, and different riding pressure values correspond to different weight values. Since each individual's physical characteristics are different, such as height and weight, the comfortable blood pressure of the thigh, the reference comfortable pressure of the waist of the backrest, and the comfortable pressure of the headrest under the comfortable sitting posture of each person are inconsistent. In order to judge whether the current seat is in the best riding comfort state of the user, it is impossible to judge whether the user is in a comfortable state through the state value of one person. Therefore, it is necessary to calculate the corresponding reference values (references) through statistical methods and obtain a reference value database. The statistical method is as follows:

[0065] 1). Divide the users into male and female, and divide them into groups at intervals of 50 mm within the height range of 1500 mm to 1900 mm, and obtain the user's height groups H1 g (h = 1500mm), H2 g (h = 1550mm), H3 g (h = 1600mm), H4 g (h = 1650mm), H5 g (h = 1700mm), H6 g (h = 1750mm), H7 g (h = 1800mm), H8 g (h = 1850mm), H9 g (h = 1900mm), a total of 18 groups (9 groups for men and women each); where H represents the height group, h is the user's height, 1, 2, 3... 9 are the corresponding group numbers, and the subscript g represents gender, which is m when the user is male or f when the user is female.

[0066] 2). Select the user heights in one of the groups to obtain the standard weight ranges corresponding to the heights, and evenly divide them into 10 groups to obtain the weight groups corresponding to the height groups in turn; taking the height group H3 of men m as an example, the standard weight range for men with a standard height of 1600 mm is 47.36 - 61.18 kg, and the weight groups are obtained in turn (47.36 kg - 48.742 kg), (48.742 kg - 50.124 kg)... (59.798 kg - 61.18 kg), where W represents the weight group, and the numbers 1, 2, 3... 10 after W are the corresponding group numbers, and the subscript H3 m represents the third height group of men (i.e., men with a standard height of 1600 mm). Subsequently, each group of people is tried to sit on the standard seat, and the sitting pressure values in the sitting state are obtained and recorded using the pressure sensors on the standard seat;

[0067] 3). Since the height groups of users are divided into 10 groups for both men and women, and there are 10 weight groups corresponding to each height group, the total number of statistical groups of users is 180 groups (90 groups for men and women respectively), and 5 people are determined in each group;

[0068] Each person is adjusted to a comfortable sitting posture to obtain the comfortable thigh blood pressure P g_h_w_i 、the comfortable cushion width value DY g_h_w_i 、the comfortable pressure of the backrest waist reference P back_g_h_w_i 、the comfortable pressure of the headrest P head_g_h_w_i for each user;

[0069] The average value of the users in each statistical group is calculated by the following formula:

[0070]

[0071] In formula (3), P g_h_w_i 、DY g_h_w_i 、P back_g_h_w_i 、P head_g_h_w_i are the comfortable thigh blood pressure, comfortable cushion width value, comfortable pressure of the backrest waist reference, and comfortable pressure of the headrest corresponding to each person in the comfortable sitting posture of each group of users. Among them, the subscript g represents gender, which is m when the user is male or f when the user is female, the subscripts h and w represent the corresponding height and weight groups, and the subscript i represents the i-th person; are the average comfortable thigh blood pressure, average comfortable cushion width value, average comfortable pressure of the backrest waist reference, and average comfortable pressure of the headrest corresponding to each group of users in the comfortable sitting posture, and the above average values are used as reference values (references) and entered into the vehicle controller to form a reference value database.

[0072] Therefore, after the user sits in the driver's seat, based on body sensors or other detection devices, after collecting the user's body data, the standard comfort status value of the user in the corresponding body and weight groups can be found in the above-mentioned reference value database, specifically as follows:

[0073] 1) Obtaining height and gender: By using the camera on the A-pillar, the gender of the user is determined, and at the same time, a photo of the user's arm is taken to obtain the arm length L. Since the height of an adult is the outstretched arm length, the height value of the user can be obtained as follows:

[0074] h = 2L (4);

[0075] 2) Determining the standard comfort status value: After obtaining the user's height value h according to Equation (4), since the actual height value of the user may be between adjacent height groups, the specific height group where the user's height is located can be obtained according to the following formula:

[0076]

[0077] In the above formula (5), H represents which group the user is in; h represents the user's height; the square brackets represent rounding down; when the user's height h > 1900 mm, the user is determined according to the largest height group; when the user's height h < 1500 mm, the user is determined according to the smallest height group;

[0078] After the height group is confirmed, the sitting pressure value of the user at this time is obtained through the sitting basin pressure sensor 112 set on the seat. The vehicle controller can screen and determine the corresponding statistical group of the user in the reference value database according to the corresponding height group and sitting pressure value of the user. Therefore, the standard comfort status value of the user's statistical group can be solved by the following formula:

[0079]

[0080] In Equation (6), Pgr, DYgr, Pgr back , Pgr back are the corresponding thigh comfortable blood pressure, seat cushion comfortable width value, backrest waist reference comfortable pressure, and headrest comfortable pressure under the comfortable sitting posture of the user in the H height group and W weight group; where the subscript g represents gender, m when the user is male or f when the user is female.

[0081] In this embodiment, step S4 specifically includes:

[0082] S41. Initially adjust the seat cushion width according to the seat cushion comfortable width value DYr, and after the adjustment, compare the current thigh blood pressure Pn with the thigh comfortable blood pressure Pr to determine whether further adjustment is needed until the thigh comfortable blood pressure Pr is reached;

[0083] Specifically, S41 includes:

[0084] S411 collects the initial width of the cushion under the user's current sitting posture, determines the user's group in the reference value database according to the user's body data, and obtains the user's cushion comfort width value and thigh comfort blood pressure Pr;

[0085] S412. Compare the initial width value of the cushion with the comfortable width value of the cushion, determine the initial width adjustment amount of the cushion according to the comparison result and adjust the cushion;

[0086] S413. After adjustment, collect the user's current thigh blood pressure Pn and compare it with the thigh comfortable blood pressure Pr, and determine whether to continue adjustment based on the comparison result.

[0087] S42. Determine the adjustment parameters of the backrest posture and the headrest posture, and adjust the backrest height and the headrest height according to the adjustment parameters of the backrest posture and the headrest posture;

[0088] S43. Monitor the backrest waist reference pressure and headrest pressure in the current seat state through sensors, and compare them with the backrest waist reference comfort pressure Pr back And headrest comfort pressure Pr head Compare and adjust the air pressure of the backrest airbag 203 and the headrest airbag 304 until the backrest profile and the headrest profile reach the backrest waist reference comfort pressure and the headrest comfort pressure;

[0089] In this embodiment, step S412 specifically includes:

[0090] S4111, compare the initial width value of the seat cushion with the comfortable width value of the seat cushion, determine the initial width adjustment amount of the seat cushion according to the comparison result, and then send an adjustment signal to the third lifting mechanism electric support rod 206 and the first drive mechanism electric support rod 119 in the seat according to the initial width adjustment amount of the seat cushion, so that the third lifting mechanism electric support rod 206 rises to make the backrest assembly 2 break away from the contact with the seat basin assembly 1, and the time interval is set to 2 seconds;

[0091] S4112, 2 seconds later, the electric support rod 119 of the first driving mechanism pushes the seat basin sub-frame 109 in the seat cushion to move left and right, and the initial adjustment amount is the initial width adjustment amount of the seat cushion;

[0092] In this embodiment, step S413 specifically includes:

[0093] After adjustment, measure the current thigh pressure Pn and compare it with the thigh comfortable blood pressure Pr:

[0094] If Pn≤1.05Pr, it indicates that the user is currently in a comfortable state and no adjustment is made;

[0095] If Pn > 1.05Pr, the seat cushion width is continuously adjusted by 10 mm until Pn ≤ 1.05Pr is satisfied.

[0096] In this embodiment, in step S42, it specifically includes:

[0097] S421. Determine the adjustment parameter dZ1 for the backrest posture and the adjustment parameter dZ2 for the headrest posture according to the following formula:

[0098]

[0099] In the above formula (7), Z1 is the user's shoulder height; Z2 is the head height; Z3 is the backrest height; Z4 is the headrest height; where Z1, Z2, Z3, and Z4 are all obtained by collecting through the camera on the vehicle A-pillar;

[0100] S422. When it is determined that the user's height is less than the preset standard height of the backrest design, if so, the backrest directly drops to the initial position without adjustment; if not, the backrest directly rises, and the adjustment amount is dZ1;

[0101] S423. When it is determined that the user's head height is less than the preset standard head height of the headrest design, if so, the headrest directly drops to the initial position without adjustment; if not, the headrest directly rises, and the adjustment amount is dZ2. The preset standard height of the backrest design and the preset standard head height of the headrest design are conventional parameters of the seat product and can be directly added to the seat control system of the vehicle, which will not be elaborated here.

[0102] In this embodiment, step S43 specifically includes:

[0103] S431. Obtain the pressure PC in the backrest airbag 203 through the airbag pressure sensors 401 respectively provided on the backrest and the headrest back and the pressure PC in the headrest airbag 304 head of the size;

[0104] S432. Determine whether the backrest lumbar reference comfort pressure Pr back is greater than the pressure PC in the backrest airbag 203 back , if so, increase the pressure by inflating, if not, decrease the pressure by deflating. When the backrest lumbar reference comfort pressure Pr back is equal to the pressure PC in the backrest airbag 203 back , stop inflating or deflating;

[0105] S433. Determine whether the headrest comfort pressure Pr head is greater than the pressure PC in the headrest airbag 304 head , if so, increase the pressure by inflating, if not, decrease the pressure by deflating. When the headrest comfort pressure Prhead等于 The pressure PC in the headrest airbag 304 head Stop air intake or deflation;

[0106] Among them, according to the adjustment signal sent by the vehicle controller, the electromagnetic valve (intake) 402 and the electromagnetic valve (exhaust) 403 of each backrest airbag 203 are opened and closed according to the signal. After the airbag pressure sensor 401 detects that the predetermined pressure value is reached, it transmits a signal to the vehicle controller. The vehicle controller issues a stop signal to the electromagnetic valve (intake) 402 and the electromagnetic valve (exhaust) 403 of each airbag, and the electromagnetic valves stop working. In this way, the task of adjusting the lumbar surface of the seat backrest is completed, automatically adapting to the back contact surface of the driver and passenger, and improving driving comfort; according to the adjustment signal sent by the vehicle controller, the electromagnetic valve (intake) 402 and the electromagnetic valve (exhaust) 403 connected to the independent airbag of the headrest airbag 304 are opened and closed according to the signal to form a spherical contact surface. After the airbag pressure sensor 401 detects that the predetermined pressure value is reached, it transmits a signal to the vehicle controller. The vehicle controller issues a stop signal to the electromagnetic valve (intake) 402 and the electromagnetic valve (exhaust) 403 of each airbag, and the electromagnetic valves stop working. In this way, the task of adjusting the spherical contact surface of the seat headrest is completed, automatically adapting to the head contour of the driver and passenger.

[0107] In this embodiment, since the standard comfort state value is obtained based on statistics and the parameter is at the median of the normal distribution, which is suitable for the general public and cannot represent each individual, the user can make corresponding adjustments based on the standard comfort state value. After the user gets in the car and sits down, the vehicle seat control method can trigger the first infrared detector 104, the seat pan pressure sensor 112, the second infrared detector, the third infrared detector 303, the pressure sensors of the backrest airbag 203 and the headrest airbag 304, and combine with the vehicle body camera to obtain the gender and human body data of the user, and send them to the vehicle controller. According to the human body data, determine the group and the standard comfort state value in the reference value database, and then obtain the initial adjustment parameter value of the seat based on the comparison between the actual comfort state value and the standard comfort state value, and send adjustment signals to each adjustment structure in the seat to adjust parameters such as the width and height of the seat cushion, the front and rear positions of the seat cushion, the height and angle of the backrest, the height of the headrest, the shape of the backrest and the shape of the headrest; among them, the first infrared detector 104 is used to obtain the shapes of the user's thighs and buttocks and the blood pressure parameters at the two places, and transmit the data signal to the vehicle controller to compare the initial width value of the seat cushion with the comfortable width value of the seat cushion and compare the current thigh blood pressure and the comfortable thigh blood pressure; the vehicle body camera is set on the A-pillar to obtain the length of the human arm and transmit the data signal to the vehicle controller to confirm the gender of the user and obtain the height value of the user; the second infrared detector is used to obtain the back height and the waist contour and transmit the data signal to the vehicle controller to obtain the adjusted height of the backrest; the third infrared detector 303 is used to obtain the head contour and the neck length and transmit the data signal to the vehicle controller to obtain the adjusted height of the headrest; the seat pan pressure sensor 112 is used to obtain the user's sitting pressure value and transmit the data signal to the vehicle controller to determine the weight group where the user is located; the pressure sensor of the backrest airbag 203 will also transmit the human waist pressure signal to the vehicle controller to compare the reference comfortable pressure of the backrest waist and the pressure in the backrest airbag; the pressure sensor of the headrest airbag 304 will also transmit the head pressure signal to the vehicle controller to compare the comfortable pressure of the headrest and the pressure in the headrest airbag; the vehicle controller is a central control unit installed on the vehicle, such as ECU, VCU, etc., which contains control software. This is prior art and will not be elaborated here. All the above detectors, driving devices and lifting mechanisms are connected to the vehicle controller through wire harnesses.

[0108] This embodiment also provides a car seat, which implements the above-mentioned car seat intelligent control method, and a seat adjustment device for adjusting the seat posture is arranged in the seat, and the seat adjustment device includes a detection device for obtaining the human body data of the user sitting on the seat and a driving device for driving the seat posture change, and the detection device is electrically connected to the driving device. In order to achieve the adjustment of the seat posture, a seat adjustment device is arranged at each part of the seat, wherein the detection device in the seat adjustment device mainly refers to the pressure sensor and infrared detector arranged on the seat cushion, the backrest and the headrest, which are mainly used to monitor the human body data of the user on the seat, such as blood pressure, etc., and the driving device is mainly arranged on the seat basin frame, the backrest frame and the headrest frame, and is used to adjust the posture of the seat basin width, the backrest angle and height, the headrest height, etc.; the seat in this embodiment is suitable for the adjustment of all seats on the vehicle, and will not be repeated here.

[0109] In this embodiment, the seat includes a seat basin frame 105, and the seat basin frame 105 includes a seat basin base 116 arranged on the floor, a seat basin bracket 111 movably arranged on the seat basin base 116, and a seat basin frame arranged on the seat basin bracket 111. The seat basin frame includes at least two seat basin sub-frames 109 arranged side by side, and the adjacent seat basin sub-frames 109 can be driven to slide toward or away from each other in the width direction of the vehicle body to adjust the overall width of the seat basin frame; in the prior art, the width of the seat basin frame 105 on the vehicle seat is mainly affected by the size of the seat basin frame, that is, the larger the seat basin frame is, the larger the filling layer formed by foaming on the seat basin frame is, and the larger the overall width of the seat basin is. At present, most of the seat basin frames are usually of fixed size, which leads to a fixed value for the width of the seat basin. At the same time, each person is different in fatness, thinness, height and height. If the seat basin is too wide, the passenger will lack a sense of wrapping when sitting, and if the seat basin is too narrow, it will affect the user's comfort when sitting. Therefore, in order to realize the above-mentioned intelligent control method for automobile seats and facilitate the adjustment of the seat cushion width, a vehicle seat structure is specially designed.

[0110] In view of the problems existing in the prior art, this solution provides a vehicle seat whose seat cushion width can be changed according to user needs. A vehicle seat generally consists of three parts: a seat pan assembly 1, a backrest assembly 2, and a headrest 3. Among them, the seat pan assembly 1 is further composed of a seat cushion skin 101, a seat cushion foam filling layer 103, and a seat pan frame 105. The seat cushion foam filling layer 103 is installed on the seat pan frame 105, and the seat cushion skin 101 covers and wraps the seat cushion foam filling layer 103. The seat pan frame 105 mainly includes a seat pan base 116 provided on the vehicle body floor, a seat pan support 111 movably provided on the seat pan base 116, and a seat pan skeleton provided on the seat pan support 111. The seat pan skeleton further includes at least two side-by-side seat pan sub-skeletons 109. The number of seat pan sub-skeletons 109 can be used according to actual needs. In this solution, the seat pan skeleton has two. By driving the two seat pan sub-skeletons 109 to slide towards or away from each other in the vehicle body width direction, the overall width of the seat pan skeleton can be adjusted to enable the user to be in the most comfortable sitting state on the seat cushion. Since the seat pan sub-skeletons 109 can be driven to move to change the overall width of the seat pan skeleton, the seat cushion skin 101 also needs to have a certain degree of stretchability. In this solution, the seat cushion skin 101 is divided into two parts: the two sides and the middle. The two sides use the commonly used fabric for seats, while the middle uses elastic fabric 102 to ensure the extensibility when the width of the seat pan skeleton changes. Since there will be a gap in the middle after the seat pan sub-skeletons 109 move, an intermediate airbag 106 is provided between adjacent seat pan sub-skeletons 109 to fill the gap in time and avoid discomfort. At the same time, an intermediate airbag inlet part 107 and an intermediate airbag outlet part 108 are correspondingly provided on the intermediate airbag 106. Solenoid valve structures with pressure sensors are provided at both the intermediate airbag inlet part 107 and the intermediate airbag outlet part 108 for electric control of opening and closing. The seat cushion foam filling layer 103 is made of commonly used materials for seat cushions, but is internally equipped with a first infrared detector 104, which can sense the external contours of the user's thighs and buttocks and the blood pressure between the thighs and buttocks through the first infrared detector 104, and can transmit the detection signal to the vehicle controller, enabling the passenger to adjust the overall width of the seat pan according to needs.

[0111] In this embodiment, it further includes a first driving device for driving the sliding of the sub-basin frame 109. The first driving device includes a first slide rail mechanism 110 disposed between the sub-basin frame 109 and the basin support 111, and a driving member for driving the sub-basin frame 109 to slide on the first slide rail mechanism 110. The fixed end of the driving member is disposed on the basin support 111, and the acting end of the driving member is fixedly connected to the sub-basin frame 109. The movement of the sub-basin frame 109 driven on the basin support 111 is mainly realized by the first slide rail mechanism 110 and the driving member. The driving member is a first driving mechanism electric strut 119 and there are two sets of them. At the same time, the acting ends of the two sets of driving members are arranged in opposite directions to respectively drive the two sub-basin frames 109. The first slide rail mechanism 110 is composed of two sets of slide rails arranged in parallel along the vehicle body width direction, and is mainly used to realize the sliding of the sub-basin frame 109 on the basin support 111. Since the fixed end of the first driving mechanism electric strut 119 is disposed on the basin support 111 and the acting end of the first driving mechanism electric strut 119 is fixedly connected to the sub-basin frame 109, when the two sets of first driving mechanism electric struts 119 simultaneously push the two sub-basin frames 109 to slide away from each other or pull the two sub-basin frames 109 to slide towards each other on the first slide rail mechanism 110, the adjustment of the overall width of the basin can be achieved. By setting the first driving device on the basin frame to adjust the overall width of the basin, the basin can be suitable for a wide range of people. At the same time, the basin structure is simple, the adjustment range is large, and the user experience satisfaction can be effectively improved.

[0112] In this embodiment, a second driving device is further included, which is disposed between the toilet bowl base 116 and the toilet bowl bracket 111. The second driving device includes a second slide rail mechanism 115 disposed on the toilet bowl base 116 and a first lifting mechanism disposed on the second slide rail mechanism 115. The first lifting mechanism is used to adjust the height position of the toilet bowl frame in the vehicle body height direction, and the second slide rail mechanism 115 is used to adjust the front-back position of the toilet bowl frame in the vehicle body length direction. In order to ensure that the toilet bowl frame can be adjusted in the vehicle body length direction, a second slide rail mechanism 115 is provided between the toilet bowl base 116 and the toilet bowl bracket 111. The second slide rail mechanism 115 includes two slide rails arranged in parallel along the vehicle body length direction and a slide rail electric device 117 for driving the toilet bowl bracket 111 to slide on the toilet bowl base 116. When the slide rail electric device 117 receives an adjustment signal from the vehicle controller, the motor in the slide rail electric device 117 rotates to drive the toilet bowl bracket 111 to move forward and backward, so as to realize the forward and backward movement of the overall seat. The first lifting mechanism mainly includes a guide rod mechanism 114 and an air spring 113. The upper end of the guide rod mechanism 114 is fixedly connected to the toilet bowl bracket 111, and the lower end of the guide rod mechanism 114 is fixedly connected to the second slide rail mechanism 115, which is mainly used to ensure the vertical movement of the toilet bowl bracket 111. The air spring 113 is used for shock absorption and height adjustment of the toilet bowl bracket 111. A toilet bowl pressure sensor 112 for measuring the human body weight is further provided at the connection end of the air spring 113 and the toilet bowl bracket 111. A second infrared detector for detecting the contours of the calves and feet is provided at the end of the toilet bowl bracket 111 close to the user. At the same time, an electronic height sensor 118 is also provided on the toilet bowl bracket 111, which is mainly used to detect the seat height and cooperate with the air spring 113 to achieve a shock absorption effect. The air spring 113 adjusts the height by controlling the internal air pressure. The vehicle controller adjusts the elastic coefficient of the air spring 113 according to the user weight detected by the toilet bowl pressure sensor 112 to ensure the shock absorption effect (comfort level) of the seat. At the same time, the first infrared detector 104 in the seat cushion foam filling layer 103 senses the blood pressure of the human thigh to monitor the comfort level of the human thigh. When the blood pressure increase slows down, the seat cushion height is automatically fine-tuned to achieve the effect of fine-tuning the human body center of gravity and relieve leg soreness and fatigue. The first lifting mechanism in the toilet bowl frame 105 of the seat realizes the lifting of the toilet bowl bracket 111 through the cooperation of the air spring 113 and the guide rod mechanism 114. Compared with the existing seats with electrically adjustable height, it has an additional shock absorption function, can effectively reduce the up and down bumps of the human body, and can also automatically adjust the height of the human body center of gravity, relieve fatigue, and improve the comfort of the driver and passengers in many aspects.

[0113] In this embodiment, it further includes a backrest frame 204 installed on the toilet bowl bracket 111. A third driving device is provided between the lower end of the backrest frame 204 and the toilet bowl bracket 111. The third driving device includes a second lifting mechanism 211 provided on the toilet bowl bracket 111 and a rotating mechanism 208 provided at the movable end of the second lifting mechanism 211 for adjusting the angle of the backrest frame 204. The backrest assembly 2 is composed of a backrest skin 201, a backrest foam filling layer 202, a backrest airbag 203, and a backrest frame 204. The backrest skin 201 is made of a conventional seat fabric. The backrest foam filling layer 202 is foamed according to the shape of the backrest frame 204 and is provided with a fourth infrared detector 205 on the contact side. The backrest frame 204 is made by bending round tubes, welded with cross beams, and has a connecting bracket at the bottom. A second lifting mechanism 211 and a rotating mechanism 208 are provided between the lower end of the backrest frame 204 and the toilet bowl bracket 111. The second lifting mechanism 211 is composed of a second lifting mechanism guide post 212, a second lifting mechanism guide sleeve 214 (with a self-lubricating bushing 215 installed in the hole), an electric strut retainer 216, and a second lifting mechanism electric strut 217 with a mounting bracket. The second lifting mechanism guide post 212 is installed on the toilet bowl bracket 111, and the second lifting mechanism guide sleeve 214 is connected to the backrest frame 204. Under the push of the second lifting mechanism electric strut 217, the rotation center of the backrest frame 204 can move up and down along the axis of the second lifting mechanism guide post 212, so that the backrest assembly 2 makes a Z-direction movement. A self-lubricating bushing 215 is installed in the guide hole of the second lifting mechanism guide sleeve 214. The self-lubricating bushing 215 is sleeved on the second lifting mechanism guide post 212, and O-ring seals 213 are provided at the upper and lower ends to play a role in sealing and noise reduction. The electric strut retainer 216 is used to clamp the head groove of the second lifting mechanism electric strut 217 and connect the second lifting mechanism electric strut 217 and the second lifting mechanism guide sleeve 212. The fixed end of the second lifting mechanism electric strut 217 is fixedly connected to the toilet bowl skeleton, and the movable end is fixedly connected to the backrest frame 204. The rotating mechanism 208 is composed of a backrest rotating motor 209, a backrest rack provided on the backrest frame 204, a rack clamp, etc. Similar to the common rotating mechanism of a seat backrest, this is prior art and will not be elaborated here. Specifically, the backrest rotating motor 209 is installed on the backrest frame 204. When the output end of the backrest rotating motor 209 rotates, it meshes and rotates with the backrest rack, that is, the backrest rotating motor 209 can drive the backrest frame 204 to rotate along the determined rotation axis on the backrest rack. The rack clamp is used to fix the backrest frame 204, the rack, and the second lifting mechanism guide sleeve 212 together, so that the rotation center of the seat backrest can move up and down along with the lifting of the second lifting mechanism guide sleeve 212.

[0114] In this embodiment, it further includes a headrest skeleton 305 installed at the upper end of the backrest frame 204. A third lifting mechanism is provided between the backrest frame 204 and the headrest skeleton 305. The third lifting mechanism is used to make the headrest skeleton 305 slide with a single degree of freedom to change the height position of the headrest skeleton 305 in the vehicle body height direction; the headrest 3 is composed of the headrest skeleton 305, a headrest foam filling layer 302, a headrest airbag 304, and a headrest skin 301. A third lifting mechanism is provided between the backrest frame 204 and the headrest skeleton 305. The third lifting mechanism is composed of a third lifting mechanism electric strut 206 installed on the upper part of the backrest frame 204 and a third lifting mechanism guide sleeve 207. The movable end of the third lifting mechanism electric strut 206 is fixedly connected to the headrest skeleton 305, and the fixed end of the third lifting mechanism electric strut 206 is installed on the upper part of the backrest frame 204. The headrest skeleton 305 is mainly driven to move up and down by the telescopic movement of the third lifting mechanism electric strut 206. The third lifting mechanism guide sleeve 207 is sleeved outside the connection part of the movable end of the third lifting mechanism electric strut 206 and the headrest skeleton 305 to play a guiding role; the headrest skin 301 is made of a seat fabric with a certain degree of ductility, and the headrest foam filling layer 302 is made of a common headrest foam material. However, third infrared detectors 303 are installed on both sides of the headrest foam filling layer 302, and the third infrared detectors are mainly used to sense the head contour.

[0115] In this embodiment, filling layers are formed by foaming on both the backrest frame 204 and the headrest skeleton 305. A cavity is provided on the user side of the filling layer, and an airbag assembly for changing the profile of the backrest filling layer or the headrest filling layer is provided in the cavity; the airbag assembly is formed by combining a certain number of independent airbags and includes a headrest airbag 304 and a backrest airbag 203 according to different application positions. Each independent airbag is equipped with a pressure sensor, a solenoid valve (intake) 402, a solenoid valve (exhaust) 403, an intake pipe 404, and an exhaust pipe 404; by providing the backrest airbag 203 on the backrest assembly 2, the curved surface in contact with the human waist can be accurately adjusted, the contact surface can be increased, the fitting degree can be improved, the waist compression feeling can be reduced, and the waist force can be made uniform, thereby improving the waist comfort; by providing the headrest airbag 304 on the headrest 3, the height and the contact surface profile of the seat headrest 3 can be adjusted. The contact profile of the headrest 3 can be controlled and adjusted by the vehicle controller to form a spherical contact surface, which better fits the head contour, has a higher fitting degree and higher comfort than the existing headrest 3 with a single fixed shape, and better protects the human body.

[0116] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. An intelligent control method for a vehicle seat, characterized in that: The seat is arranged at the driver's position of the vehicle and includes the following steps: S1. Taking the throttle / brake as the origin, the vehicle body length direction as the horizontal axis, and the vehicle body height direction as the vertical axis, establish a plane coordinate system. Select a point on the seat as the initial seat movement point, and determine the movable adjustment area of the initial seat movement point in the plane coordinate system; S2. Obtain the length of the user's calf, and draw a circle in the plane coordinate system with the origin as the center and the length of the user's calf as the radius. Obtain the arc segment where the circle intersects the movable adjustment area; Select a point on the arc segment as the adjusted seat position point, and compare it with the initial seat movement point to obtain the adjustment parameters of the seat in the plane coordinate system.

2. The intelligent control method for an automotive seat according to claim 1, wherein: The step of selecting a point on the seat as the initial seat movement point and determining the movable adjustment area of the initial seat movement point in the plane coordinate system specifically includes: Set the end of the seat cushion closest to the origin as the initial seat movement point P. Using the adjustable length in the vehicle body length direction and the adjustable height in the vehicle body height direction of the seat as the range, obtain the rectangular movable adjustment area of the initial seat movement point P. Among them, the coordinates of each endpoint in the movable adjustment area are P1, P2, P3, and P4, where P4 is the endpoint closest to the origin, P1 is the endpoint directly above P4, P3 is the endpoint directly behind P4, and P2 is the endpoint farthest from the origin.

3. The intelligent control method for an automotive seat according to claim 1, wherein: It also includes the following steps: S3. Collect the user's body data and the actual comfort state value in the current sitting posture, and determine the standard comfort state value corresponding to the user's comfortable sitting posture according to the user's body data; S4. Compare the actual comfort state value with the standard comfort state value, and adjust the seat posture according to the comparison result until the user is in a comfortable sitting posture.

4. The intelligent control method for an automotive seat according to claim 3, wherein: Determining the standard comfort state value corresponding to the user's comfortable sitting posture according to the user's body data specifically includes: Collect the user's height and gender data, and determine at least one of the comfortable thigh blood pressure, the reference comfortable pressure of the backrest waist, and the comfortable pressure of the headrest corresponding to the user's comfortable sitting posture according to the user's height and gender data.

5. The intelligent control method for an automotive seat according to claim 4, wherein: Comparing the actual comfort state value with the standard comfort state value and adjusting the seat posture according to the comparison result until the user is in a comfortable sitting posture specifically includes: Compare the thigh blood pressure of the user in the current sitting posture collected with the comfortable thigh blood pressure corresponding to the user's comfortable sitting posture, and / or compare the backrest waist pressure of the user in the current sitting posture collected with the reference comfortable pressure of the backrest waist corresponding to the user's comfortable sitting posture, and / or compare the headrest pressure of the user in the current sitting posture collected with the comfortable pressure of the headrest corresponding to the user's comfortable sitting posture. Adjust the seat posture according to the comparison result until the user is in a comfortable sitting posture.

6. The intelligent control method of an automotive seat according to claim 5, characterized in that: The step of adjusting the seat posture according to the comparison result until the user is in a comfortable sitting posture specifically includes: According to the comparison result, confirm the comfortable width value of the seat cushion and adjust the seat cushion; After adjustment, continue to collect the actual comfort state value of the user and compare the actual comfort state value with the standard comfort state value to determine whether further adjustment is needed until the user is in a comfortable sitting posture.

7. An automotive seat, characterized in that: Implement the intelligent control method for vehicle seats according to claim 6. A seat adjusting device for adjusting the seat posture is provided inside the seat. The seat adjusting device includes a detection device for collecting human body data of a user sitting on the seat and a driving device for driving the change of the seat posture. The detection device is electrically connected to the driving device.

8. The vehicle seat according to claim 7, characterized in that: The seat includes a seat pan frame, and the seat pan frame includes a seat pan base, a seat pan support movably arranged on the seat pan base, and a seat pan skeleton arranged on the seat pan support. The seat pan skeleton includes at least a pair of seat pan sub-skeletons arranged side by side. Adjacent seat pan sub-skeletons can be driven to slide towards or away from each other in the vehicle body width direction to adjust the overall width of the seat pan skeleton.

9. The vehicle seat according to claim 8, characterized in that: The driving device includes a first driving device for driving the sliding of the seat pan sub-skeletons. The first driving device includes a first slide rail mechanism arranged between the seat pan sub-skeletons and the seat pan support and a driving member for driving the seat pan sub-skeletons to slide on the first slide rail mechanism. The fixed end of the driving member is arranged on the seat pan support, and the acting end of the driving member is fixedly connected to the seat pan sub-skeleton; It further includes a second driving device arranged between the seat pan base and the seat pan support. The second driving device includes a second slide rail mechanism arranged on the seat pan base and a first lifting mechanism arranged on the second slide rail mechanism. The first lifting mechanism is used to adjust the height position of the seat pan skeleton in the vehicle body height direction, and the second slide rail mechanism is used to adjust the front-back position of the seat pan skeleton in the vehicle body length direction; It further includes a backrest frame installed on the seat pan support. A third driving device is arranged between the lower end of the backrest frame and the seat pan support. The third driving device includes a second lifting mechanism arranged on the seat pan support and a rotating mechanism arranged at the movable end of the second lifting mechanism for adjusting the angle of the backrest frame.

10. The vehicle seat according to claim 9, characterized in that: It further includes a headrest skeleton installed at the upper end of the backrest frame. A third lifting mechanism is arranged between the backrest frame and the headrest skeleton. The third lifting mechanism is used to enable the headrest skeleton to slide with a single degree of freedom to change the height position of the headrest skeleton in the vehicle body height direction; Foam is formed on both the backrest frame and the headrest skeleton to form a filling layer. The filling layer is provided with a cavity on the user use side, and an airbag assembly for changing the profile of the backrest filling layer or the headrest filling layer is arranged in the cavity.

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