Multifunctional intelligent single-seat device and its control method, three-person seat device and its control method

Abstract

The present invention discloses a multifunctional intelligent single-seat device and its control method, and a three-seat device and its control method. In the early stage of a frontal collision, the forward impact energy of the occupant is absorbed by the deflation of the seat cushion airbag; in the later stage of the frontal collision, the inflated headrest airbag A supports the occupant's head that is reset backward in advance, avoiding or reducing the occupant injury to the greatest extent. In a rear-end collision, on the one hand, the deflation of the upper backrest airbag and the inflation of the lower backrest airbag cause the whole upper body of the occupant to rotate backward; on the other hand, the headrest, headrest airbag A, and headrest airbag B jointly support the occupant's head to inhibit the backward movement of the head, avoiding or reducing the occupant's neck injury to the greatest extent. In a side collision, no matter whether the right seat frame is in a horizontal position or a vertical state, the airbag is always in a horizontal position. The inflated airbag, magnet, and roof magnet B prevent the occupant from hitting the interior trim on the side, avoiding or reducing the occupant injury to the greatest extent.

Description

Technical Field

[0001] The present invention belongs to the field of automotive safety, and particularly relates to a multifunctional intelligent seat device and a control method thereof. Background Art

[0002] In addition to providing better riding comfort for occupants, the motor vehicle seat more importantly effectively protects the vehicle occupants in frontal collisions, rear-end collisions, and side collisions.

[0003] In the early stage of a frontal collision of a motor vehicle, the vehicle occupants are impacted forward against the interior trim of the vehicle under the action of the collision inertia force, resulting in injuries to the occupants' heads, necks, and chests; in the later stage of a frontal collision, under the action of the pulling force of the seat belt and the rebounding force of the airbag, the vehicle occupants make a backward reset movement. During this process, when the occupants' backs come into contact with the seat backrest, the backs stop moving backward, but the heads still move backward until they contact the headrest, which will cause a large stretching bending moment on the necks, thus resulting in neck injuries to the occupants.

[0004] In a rear-end collision of a motor vehicle, the upper body of the occupant moves backward under the action of the collision inertia force. If the top of the occupant's head exceeds the upper surface of the headrest by 6 cm before the rear-end collision, or if the occupant is in an abnormal sitting posture and the head exceeds the left and right surfaces of the headrest, it will cause the backward displacement of the occupant's head to be greater than the backward displacement of the chest, easily resulting in "whiplash" injuries to the neck.

[0005] When a motor vehicle is subjected to a side collision, the vehicle occupants are impacted laterally against the interior trim of the vehicle under the action of the collision inertia force, resulting in injuries to the occupants' heads, necks, and chests. Summary of the Invention

[0006] In view of the above situation, the present invention provides a multifunctional intelligent seat device and a control method thereof, which can effectively protect the safety of vehicle occupants in frontal collisions, rear-end collisions, and side collisions of a motor vehicle.

[0007] The present invention achieves the above technical objectives through the following technical solutions.

[0008] When the multifunctional intelligent seat device is applied to a single-seat, it is composed of a seat system, a vehicle speed sensor, and a controller (abbreviation "ECU"). The seat system includes a headrest, a backrest, a seat cushion, headrest airbag A, headrest airbag B, headrest airbag C, upper backrest airbag, lower backrest airbag, seat cushion airbag, magnet A, magnet B, roof magnet A, B-pillar magnet, pipe A, pipe B, check valve A, check valve B, air supply device A, air supply pipe A, camera A, and headrest height sensor.

[0009] The headrest is located above the backrest and the seat cushion, the headrest is fixedly connected to the upper end of the headrest guide rod, the lower end of the headrest guide rod is inserted into the backrest, and the front of the bottom end of the backrest is connected to the seat cushion.

[0010] The headrest airbag A, headrest airbag B, and headrest airbag C are respectively folded and stored at the front end, top end, and left end of the headrest. The top end of the headrest airbag B is fixedly connected to the magnet A, and the left end of the headrest airbag C is fixedly connected to the magnet B.

[0011] The upper backrest airbag is in the shape of a cuboid and is semi-embedded and fixed at the upper end of the front surface of the backrest. The back surface of the upper backrest airbag is the common front surface of the backrest. The upper surface, left surface, and right surface of the upper backrest airbag are flush with the upper surface, left surface, and right surface of the backrest respectively.

[0012] The lower backrest airbag is in the shape of a cuboid and is semi-embedded and fixed at the lower end of the front surface of the backrest. The back surface of the lower backrest airbag is the common front surface of the backrest. The left surface and right surface of the lower backrest airbag are flush with the left surface and right surface of the backrest respectively. The lower surface of the upper backrest airbag is in contact with the upper surface of the lower backrest airbag.

[0013] The seat cushion airbag is embedded and fixedly installed in the seat cushion, and the upper surface of the seat cushion airbag is flush with the upper surface of the seat cushion.

[0014] Under normal circumstances, the upper backrest airbag, the lower backrest airbag, and the seat cushion airbag are filled with air. The upper backrest airbag, the lower backrest airbag, and the seat cushion airbag together with the backrest and the seat cushion constitute the outer contour of the seat system. The occupant sits on the seat cushion airbag, and the upper backrest airbag and the lower backrest airbag respectively support the back and waist of the occupant.

[0015] The roof magnet A is located above the headrest and is fixedly connected to the roof; the B-pillar magnet is installed inside the B-pillar.

[0016] The pipe A is installed inside the headrest and the backrest and is used to connect the headrest airbag A and the seat cushion airbag; the pipe B is installed inside the backrest and is used to connect the upper backrest airbag and the lower backrest airbag.

[0017] The one-way valve A and the one-way valve B are respectively located in the pipe A and the pipe B. The one-way valve A is used to transfer the gas in the seat cushion airbag to the headrest airbag A, and the one-way valve B is used to transfer the gas in the upper backrest airbag to the lower backrest airbag. The opening degrees of the one-way valve A and the one-way valve B are adjustable.

[0018] The air supply device A can, through the air supply pipe A, fill the headrest airbag B and the headrest airbag C with air to make them expand.

[0019] The camera A is fixedly installed on the rear roof and is used to continuously capture the position of the occupant's head relative to the headrest and send the image information to the ECU. The ECU determines, based on the image information continuously captured by the camera A, whether the occupant's head top exceeds the upper surface of the headrest by 6 cm in the vertical direction and whether the occupant's head exceeds the left surface of the headrest in the horizontal direction.

[0020] The headrest height sensor is installed in the headrest and is used to detect in real time the height of the upper surface of the headrest relative to the vehicle floor (referred to as "headrest height") and send the detection information to the ECU.

[0021] The vehicle speed sensor is installed on the vehicle body and is used to detect in real time the driving speed of the vehicle and send the detection information to the ECU. The ECU determines whether a frontal collision or a rear-end collision occurs based on the vehicle driving speed detected by the vehicle speed sensor in real time and determines the collision speed.

[0022] The ECU is the core of the entire device and can be integrated into the vehicle's central controller. The ECU is connected to the check valve A, the check valve B, the air supply device A, the vehicle speed sensor, the camera A, and the headrest height sensor through different ports. The ECU controls the check valve A, the check valve B, and the air supply device A.

[0023] When the multi-functional intelligent seat device is applied to a single seat, the control method of the multi-functional intelligent seat device includes the following steps:

[0024] (1) After the motor vehicle starts, turn on the multi-functional intelligent seat device.

[0025] (2) The vehicle speed sensor detects in real time the driving speed of the vehicle, and the headrest height sensor detects in real time the headrest height. The ECU determines whether a frontal collision or a rear-end collision occurs based on the detection information of the vehicle speed sensor and determines the collision speed; the ECU determines the headrest height based on the detection information of the headrest height sensor.

[0026] (3) The camera A captures in real time the position of the occupant's head relative to the headrest. The ECU determines whether, in the vertical direction, the top of the occupant's head exceeds the upper surface of the headrest by 6 cm and whether, in the horizontal direction, the occupant's head exceeds the left surface of the headrest based on the detection information of the camera A.

[0027] (4) When a frontal collision occurs to the motor vehicle, in the early stage of the frontal collision, the occupant rushes forward. The ECU opens the check valve A and controls in real time the opening degree of the check valve A according to the collision speed. Under the pressure of the occupant, the air in the seat cushion airbag is transmitted through the pipeline A to the headrest airbag A. At this time, on the one hand, the seat cushion airbag deflates and the occupant sinks into the seat cushion airbag, thereby absorbing the forward impact energy of the occupant and avoiding or reducing the occupant injury to the greatest extent; on the other hand, the headrest airbag A changes from the folded state to the inflated state, and the inflated headrest airbag A rushes forward out of the front surface of the headrest. In the later stage of the frontal collision, during the process of the occupant's backward reset, compared with the headrest, the inflated headrest airbag A can support the occupant's head in advance and avoid or reduce the occupant's neck injury to the greatest extent.

[0028] (5) When a motor vehicle has a rear-end collision, the occupant rams backward. On the one hand, the ECU opens the one-way valve B and controls the opening degree of the one-way valve B in real time according to the collision speed. Under the pressure of the occupant's back, the air in the upper back airbag is transmitted to the lower back airbag through the pipe B. At this time, the stiffness of the upper back airbag decreases, and the stiffness of the lower back airbag increases. As a result, the occupant's back can sink into the upper back airbag, and the lower back airbag can inhibit the backward movement of the occupant's waist, causing the entire upper body of the occupant to rotate backward. On the other hand, the ECU determines whether the top of the occupant's head exceeds the upper surface of the headrest by 6 cm in the vertical direction; determines whether the occupant's head exceeds the left surface of the headrest in the horizontal direction; and determines the height of the headrest. If the top of the occupant's head exceeds the upper surface of the headrest by 6 cm, the ECU controls the inflation amount of the air supply device A into the headrest airbag B according to the collision speed and the headrest height. At this time, the headrest airbag B changes from the folded state to the inflated state, and the inflated headrest airbag B rushes upward out of the upper surface of the headrest. After that, the magnet A at the top of the headrest airbag B is attracted to the roof magnet A, so that the headrest and the headrest airbag B jointly support the occupant's head, effectively inhibiting the backward movement of the head. If the occupant's head exceeds the left surface of the headrest, the ECU controls the air supply device A to fill the headrest airbag C with air according to the collision speed. At this time, the headrest airbag C changes from the folded state to the inflated state, and the inflated headrest airbag C rushes leftward out of the left surface of the headrest. After that, the magnet B at the left end of the headrest airbag C is attracted to the B-pillar magnet, so that the headrest and the headrest airbag C jointly support the occupant's head, effectively inhibiting the backward movement of the head. Ultimately, the neck injury of the occupant is avoided or reduced to the greatest extent.

[0029] (6) After the frontal collision or rear-end collision ends, the multifunctional intelligent seat device is turned off.

[0030] Preferably, in step (4), the air release rate and air release amount of the seat cushion airbag, and the inflation rate and inflation amount of the headrest airbag A are related to the frontal collision speed, and their corresponding relationships are obtained through experiments or simulations. In step (5), the inflation amount of the headrest airbag B is related to the rear-end collision speed and the headrest height, and their corresponding relationships are obtained through experiments or simulations; the inflation amount of the headrest airbag C is related to the rear-end collision speed, and their corresponding relationships are obtained through experiments or simulations; the air release rate and air release amount of the upper back airbag, and the inflation rate and inflation amount of the lower back airbag are related to the rear-end collision speed, and their corresponding relationships are obtained through experiments or simulations.

[0031] When the multifunctional intelligent seat device is applied to a three-person seat, it includes a left seat frame, a middle seat frame, a right seat frame, a sleeve A, a sleeve B, a sleeve C, a sleeve D, a boss, a rotating shaft A, a transmission shaft, a rotating shaft B, a bevel gear A, a bevel gear B, a bevel gear C, a bevel gear D, a connecting member A, a connecting member B, a flat plate, an airbag, a magnet, a roof magnet B, an air supply device B, an air supply pipe B, a lateral speed sensor, a camera B, and a controller (abbreviation: "ECU").

[0032] The left seat frame is located at the leftmost side; the middle seat frame is located on the right side of the left seat frame, and the left seat frame is fixedly connected to the middle seat frame; the right seat frame is located on the right side of the middle seat frame, and a rotating hinge is provided between the middle seat frame and the right seat frame, and the right seat frame can rotate around the right side of the middle seat frame. When the left seat frame, the middle seat frame, and the right seat frame are in the initial position, the three frames are in the same plane. The left seat frame, the middle seat frame, and the right seat frame are the frames of the left seat, the middle seat, and the right seat respectively. The rotating shaft A, the transmission shaft, and the rotating shaft B are cylindrical.

[0033] Based on the forward driving direction of the vehicle, the sleeve A is fixedly installed at the front right end of the middle seat frame, and the sleeve B is fixedly installed at the rear right end of the middle seat frame. The front and rear ends of the rotating shaft A are respectively inserted into the sleeve A and the sleeve B, and the rotating shaft A can rotate in the sleeve A and the sleeve B. The connecting pieces A and B are fixedly connected to the left end of the right seat frame, and the connecting piece A is located in front of the connecting piece B. The rotating shaft A passes through the circular holes at the left ends of the connecting pieces A and B, and the rotating shaft A is fixedly connected to the connecting pieces A and B. The sleeve C is fixedly installed at the front right end of the right seat frame, and the sleeve D is fixedly installed at the rear right end of the right seat frame. The front and rear ends of the rotating shaft B are respectively inserted into the sleeve C and the sleeve D, and the rotating shaft B can rotate in the sleeve C and the sleeve D. A concave platform is provided in the middle section of the rotating shaft B, and the flat plate is horizontally installed on the upper surface of the concave platform. Usually, the airbag is folded and stored on the flat plate. The top end of the airbag is fixedly connected to the magnet. The air supply device B can fill the airbag with air through the air supply pipe B to make it expand, and the expanded airbag rushes upward out of the surface of the right seat.

[0034] The transmission shaft is horizontally placed at the rear end of the right seat frame and is perpendicular to the rotating shaft A and the rotating shaft B. The convex platform is fixedly installed at the rear end of the right seat frame, and the transmission shaft passes through the circular hole at the upper end of the convex platform with a clearance. The bevel gear A is fixedly installed at the rear end of the rotating shaft A, between the sleeve B and the connecting piece B, and the tooth tip of the bevel gear A faces forward. The bevel gear D is fixedly installed at the rear end of the rotating shaft B, between the sleeve D and the flat plate, and the tooth tip of the bevel gear D faces forward. The bevel gear B is fixedly installed at the left end of the transmission shaft, the tooth tip of the bevel gear B faces left, and the bevel gear A meshes with the bevel gear B; the bevel gear C is fixedly installed at the right end of the transmission shaft, the tooth tip of the bevel gear C faces right, and the bevel gear C meshes with the bevel gear D.

[0035] The roof magnet B is located above the right seat frame and is fixedly connected to the roof. The roof magnet B can be attracted to the magnet at the top end of the airbag.

[0036] The lateral speed sensor is installed on the vehicle body and is used to detect the lateral speed of the vehicle body in real time and send the detection information to the ECU. The ECU determines whether a side collision of the motor vehicle occurs and determines the collision speed according to the lateral speed of the vehicle body detected by the lateral speed sensor in real time. The camera B is fixedly installed on the front row roof and is used to capture the image of the three-person seat in real time and send the image information to the ECU. The ECU determines whether there are occupants in the middle seat and the right seat of the three-person seat and the height of the right side of the right seat frame relative to the floor according to the image information captured by the camera B in real time. The ECU is the core of the entire device and can be integrated into the vehicle's central controller. The ECU is connected to the air supply device B, the lateral speed sensor, and the camera B through different ports. The ECU controls the air supply device B.

[0037] When there is no occupant in the right seat, with the forward driving direction of the vehicle as the reference, the occupants in other seats cause the right seat frame to rotate counterclockwise by 90 degrees around the right side of the middle seat frame. Finally, the right seat frame is perpendicular to the middle seat frame to save the interior space of the vehicle. During the process of the right seat frame rotating counterclockwise by 90 degrees, the right seat frame drives the rotating shaft A and the bevel gear A to rotate counterclockwise through the force transmission of the connecting piece A and the connecting piece B. The bevel gear A meshes with the bevel gear B. With the vehicle's lateral left direction as the reference, the bevel gear A drives the bevel gear B and the transmission shaft to rotate clockwise, and the bevel gear C rotates clockwise accordingly. The bevel gear C meshes with the bevel gear D. With the vehicle's forward driving direction as the reference, the bevel gear C drives the bevel gear D and the rotating shaft B to rotate clockwise, and the flat plate rotates clockwise accordingly. Finally, when the right seat frame rotates counterclockwise by 90 degrees, the flat plate rotates clockwise by 90 degrees, and the flat plate and the airbag are still in a horizontal position.

[0038] After that, when an occupant sits on the right seat, with the forward driving direction of the vehicle as the reference, the occupant causes the right seat frame to rotate clockwise by 90 degrees around the right side of the middle seat frame to restore the horizontal position. Through the force transmission of the connecting piece A, the connecting piece B, the rotating shaft A, the bevel gear A, the bevel gear B, the transmission shaft, the bevel gear C, the bevel gear D, and the rotating shaft B, finally the flat plate and the airbag are restored to the horizontal position.

[0039] When the multifunctional intelligent seat device is applied to a three-person seat, the control method of the multifunctional intelligent seat device includes the following steps:

[0040] (1) After the motor vehicle starts, turn on the multifunctional intelligent seat device.

[0041] (2) The lateral velocity sensor detects the lateral velocity of the vehicle body in real time, the camera B captures the image of the three-person seat in real time, and the ECU determines whether a side collision of the motor vehicle occurs and determines the collision speed according to the detection information of the lateral velocity sensor; the ECU determines whether there are occupants in the middle seat and the right seat and the height of the right side of the right seat frame relative to the floor according to the detection information of the camera B.

[0042] (3) When the motor vehicle suffers a side collision from the left side of the vehicle, the ECU determines the side collision speed and whether there are occupants in the middle seat and the right seat. If there are no occupants in both the middle seat and the right seat, the ECU does not issue any instructions; if there is an occupant in the right seat, at this time the middle seat frame and the right seat frame are in a horizontal position, the flat plate and the airbag are in a horizontal position, and the ECU controls the inflation amount of the airbag in the airbag according to the side collision speed and the height of the right side of the right seat frame relative to the floor. The airbag changes from a folded state to an inflated state, and the inflated airbag rushes upward out of the upper surface of the right seat. Thereafter, the magnet at the top of the airbag attracts the roof magnet B, so that the airbag can prevent the occupant from hitting the interior parts on the right side of the vehicle and avoid or reduce the occupant injury to the greatest extent; if there is an occupant in the middle seat and no occupant in the right seat, at this time the right seat frame is perpendicular to the middle seat frame, the flat plate and the airbag are in a horizontal position, and the ECU controls the inflation amount of the airbag in the airbag according to the side collision speed and the height of the right side of the right seat frame relative to the floor. The airbag changes from a folded state to an inflated state, and the inflated airbag rushes upward out of the right surface of the right seat. Thereafter, the magnet at the top of the airbag attracts the roof magnet B, so that the airbag can prevent the occupant from hitting the interior parts on the right side of the vehicle and avoid or reduce the occupant injury to the greatest extent.

[0043] (4) After the side collision ends, the multifunctional intelligent seat device is turned off.

[0044] Preferably, in step (3), the inflation amount of the airbag is related to the side collision speed and the height of the right side of the right seat frame relative to the floor, and the corresponding relationship is obtained by experiments or simulations.

[0045] The beneficial effects of the present invention are:

[0046] The multifunctional intelligent seat device described in the present invention absorbs the forward impact energy of the occupant through the deflation of the seat cushion airbag in the early stage of a frontal collision; in the later stage of a frontal collision, the inflated headrest airbag A supports the occupant's head that is reset backward in advance; to avoid or reduce occupant injuries to the greatest extent. In a rear-end collision, on the one hand, through the deflation of the upper backrest airbag and the inflation of the lower backrest airbag, the whole upper body of the occupant rotates backward; on the other hand, the headrest, headrest airbag A, and headrest airbag B are used together to support the occupant's head and inhibit the backward movement of the head; to avoid or reduce occupant neck injuries to the greatest extent. In a side collision, regardless of whether the right seat frame is in a horizontal position or a vertical state, the airbag is always in a horizontal position, and the inflated airbag, magnets, and roof magnet B prevent the occupant from hitting the lateral vehicle interior trim, to avoid or reduce occupant injuries to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 It is a schematic structural diagram of the headrest, backrest, seat cushion, headrest airbag A, upper backrest airbag, lower backrest airbag, seat cushion airbag, pipe A, pipe B, one-way valve A, one-way valve B, camera A, headrest height sensor, vehicle speed sensor, and ECU in Embodiment 1;

[0048] Figure 2 It is a schematic structural diagram of the headrest airbag B, headrest airbag C, magnet A, magnet B, roof magnet A, B-pillar magnet, air supply device A, air supply pipe A, and ECU in Embodiment 1;

[0049] Figure 3 It is a three-dimensional axial view of the multifunctional intelligent seat device in Embodiment 2;

[0050] Figure 4 It is a top view of the multifunctional intelligent seat device in Embodiment 2;

[0051] Figure 5 It is a schematic structural diagram of the airbag, magnets, roof magnet B, air supply device B, air supply pipe B, lateral speed sensor, camera B, and ECU in Embodiment 2.

[0052] The reference numerals in the figure are named as follows: {1}-{1}, headrest; {1}-{2}, backrest; {1}-{3}, seat cushion; {1}-{4}, headrest airbag A; {1}-{5}, headrest airbag B; {1}-{6}, headrest airbag C; {1}-{7}, upper backrest airbag; {1}-{8}, lower backrest airbag; {1}-{9}, seat cushion airbag; {1}-{10}, magnet A; {1}-{11}, magnet B; {1}-{12}, roof magnet A; {1}-{13}, B-pillar magnet; {1}-{14}, pipe A; {1}-{15}, pipe B; {1}-{16}, one-way valve A; {1}-{17}, one-way valve B; {1}-{18}, air supply device A; {1}-{19}, air supply pipe A; {1}-{20}, camera A; {1}-{21}, headrest height sensor; 22, vehicle speed sensor; 23, ECU;

[0053] 2-1, Left seat frame; 2-2, Middle seat frame; 2-3, Right seat frame; 2-4, Sleeve A; 2-5, Sleeve B; 2-6, Sleeve C; 2-7, Sleeve D; 2-8, Boss; 2-9, Rotating shaft A; 2-10, Transmission shaft; 2-11, Rotating shaft B; 2-12, Bevel gear A; 2-13, Bevel gear B; 2-14, Bevel gear C; 2-15, Bevel gear D; 2-16, Connecting piece A; 2-17, Connecting piece B; 2-18, Flat plate; 2-19, Airbag; 2-20, Magnet; 2-21, Roof magnet B; 2-22, Gas supply device B; 2-23, Gas supply pipeline B; 2-24, Lateral speed sensor; 2-25, Camera B. Detailed implementation mode

[0054] The present invention will be further described below with reference to the accompanying drawings.

[0055] In Embodiment 1, the multifunctional intelligent seat device is applied to a single seat. As Figure 1 shown in FIG. 2, the multifunctional intelligent seat device includes a seat system, a vehicle speed sensor 22, and an ECU 23. The seat system includes a headrest 1-1, a backrest 1-2, a seat cushion 1-3, a headrest airbag A 1-4, a headrest airbag B 1-5, a headrest airbag C 1-6, an upper backrest airbag 1-7, a lower backrest airbag 1-8, a seat cushion airbag 1-9, a magnet A 1-10, a magnet B 1-11, a roof magnet A 1-12, a B-pillar magnet 1-13, a pipeline A 1-14, a pipeline B 1-15, a check valve A 1-16, a check valve B 1-17, a gas supply device A 1-18, a gas supply pipeline A 1-19, a camera A 1-20, and a headrest height sensor 1-21.

[0056] The headrest 1-1 is located above the backrest 1-2 and the seat cushion 1-3. The headrest 1-1 is fixedly connected to the upper end of the headrest guide rod, and the lower end of the headrest guide rod is inserted into the backrest 1-2. The front of the bottom end of the backrest 1-2 is connected to the seat cushion 1-3.

[0057] The headrest airbag A 1-4, the headrest airbag B 1-5, and the headrest airbag C 1-6 are respectively folded and stored at the front end, the top end, and the left end of the headrest 1-1. The top end of the headrest airbag B 1-5 is fixedly connected to the magnet A 1-10, and the left end of the headrest airbag C 1-6 is fixedly connected to the magnet B 1-11.

[0058] The upper backrest airbag 1-7 is in the shape of a cuboid and is semi-embedded and fixed at the upper end of the front surface of the backrest 1-2. The back surface of the upper backrest airbag 1-7 is the common front surface of the backrest 1-2. The upper surface, the left surface, and the right surface of the upper backrest airbag 1-7 are flush with the upper surface, the left surface, and the right surface of the backrest 1-2 respectively.

[0059] The lower backrest air bags 1-8 are rectangular and are semi-embedded and fixed at the lower end of the front surface of the backrest 1-2. The back surface of the lower backrest air bags 1-8 is the common front surface of the backrest 1-2, and the left and right surfaces of the lower backrest air bags 1-8 are flush with the left and right surfaces of the backrest 1-2 respectively. The lower surface of the upper backrest air bag 1-7 is in contact with the upper surface of the lower backrest air bag 1-8.

[0060] The seat cushion air bag 1-9 is embedded and fixedly installed in the seat cushion 1-3, and the upper surface of the seat cushion air bag 1-9 is flush with the upper surface of the seat cushion 1-3.

[0061] Under normal circumstances, the upper backrest air bag 1-7, the lower backrest air bag 1-8, and the seat cushion air bag 1-9 are filled with air. The upper backrest air bag 1-7, the lower backrest air bag 1-8, and the seat cushion air bag 1-9 together with the backrest 1-2 and the seat cushion 1-3 constitute the outer contour of the seat system. The occupant sits on the seat cushion air bag 1-9, and the upper backrest air bag 1-7 and the lower backrest air bag 1-8 support the occupant's back and waist respectively.

[0062] The roof magnet A1-12 is located above the headrest 1-1 and is fixedly connected to the roof; the B-pillar magnet 1-13 is installed inside the B-pillar.

[0063] The pipe A1-14 is installed inside the headrest 1-1, the headrest guide rod, and the backrest 1-2, and is used to connect the headrest air bag A1-4 and the seat cushion air bag 1-9; the pipe B1-15 is installed inside the backrest 1-2 and is used to connect the upper backrest air bag 1-7 and the lower backrest air bag 1-8.

[0064] The one-way valve A1-16 and the one-way valve B1-17 are respectively located inside the pipe A1-14 and the pipe B1-15. The one-way valve A1-16 is used to transmit the gas in the seat cushion air bag 1-9 to the headrest air bag A1-4, and the one-way valve B1-17 is used to transmit the gas in the upper backrest air bag 1-7 to the lower backrest air bag 1-8. The opening degrees of the one-way valve A1-16 and the one-way valve B1-17 are adjustable.

[0065] The air supply device A1-18 can, through the air supply pipe A1-19, fill the headrest air bag B1-5 and the headrest air bag C1-6 with air to make them expand.

[0066] The camera A1-20 is fixedly installed on the rear roof and is used to continuously capture the position of the occupant's head relative to the headrest and send the image information to the ECU23. The ECU23 determines, based on the image information continuously captured by the camera A1-20, whether the occupant's head top exceeds the upper surface of the headrest 1-1 by 6 cm in the vertical direction and whether the occupant's head exceeds the left surface of the headrest 1-1 in the horizontal direction.

[0067] The headrest height sensor 1-21 is installed in the headrest 1-1 and is used to detect in real time the height of the upper surface of the headrest 1-1 relative to the vehicle floor (abbreviated as "headrest height"), and send the detection information to the ECU 23.

[0068] The vehicle speed sensor 22 is installed on the vehicle body and is used to detect in real time the driving speed of the vehicle, and send the detection information to the ECU 23. The ECU 23 determines whether the motor vehicle has a frontal collision or a rear-end collision according to the driving speed of the vehicle detected in real time by the vehicle speed sensor 22, and determines the collision speed.

[0069] The ECU 23 is the core of the entire device and can be integrated into the central controller of the vehicle. The ECU 23 is connected to the check valve A 1-16, the check valve B 1-17, the air supply device A 1-18, the vehicle speed sensor 22, the camera A 1-20, and the headrest height sensor 1-21. The ECU 23 controls the check valve A 1-16, the check valve B 1-17, and the air supply device A 1-18.

[0070] In order to achieve the protection effect of the present invention in Embodiment 1, it is realized by the following control method:

[0071] (1) After the motor vehicle is started, turn on the multifunctional intelligent seat device.

[0072] (2) The vehicle speed sensor 22 detects in real time the driving speed of the vehicle, the headrest height sensor 1-21 detects in real time the headrest height, the ECU 23 determines whether the motor vehicle has a frontal collision or a rear-end collision according to the detection information of the vehicle speed sensor 22, and determines the collision speed; the ECU determines the headrest height according to the detection information of the headrest height sensor 1-21.

[0073] (3) The camera A 1-20 takes pictures in real time of the position of the occupant's head relative to the headrest. The ECU 23 determines whether, in the vertical direction, the top of the occupant's head exceeds the upper surface of the headrest 1-1 by 6 cm; in the horizontal direction, whether the occupant's head exceeds the left surface of the headrest 1-1 according to the detection information of the camera A 1-20.

[0074] (4) When a frontal collision occurs to a motor vehicle, in the early stage of the frontal collision, the occupant rushes forward. The ECU23 opens the one-way valve A1-16 and controls the opening degree of the one-way valve A1-16 in real time according to the collision speed. Under the pressure of the occupant, the air in the seat cushion airbag 1-9 is transmitted to the headrest airbag A1-4 through the pipeline A1-14. At this time, on the one hand, the seat cushion airbag 1-9 deflates, and the occupant sinks into the seat cushion airbag 1-9, thereby absorbing the forward impact energy of the occupant and avoiding or reducing the occupant injury to the greatest extent; on the other hand, the headrest airbag A1-4 changes from the folded state to the inflated state, and the inflated headrest airbag A1-4 protrudes forward from the front surface of the headrest 1-1. In the later stage of the frontal collision, during the backward reset process of the occupant, compared with the headrest 1-1, the inflated headrest airbag A1-4 can support the occupant's head in advance, avoiding or reducing the occupant's neck injury to the greatest extent.

[0075] (5) When a rear-end collision occurs to a motor vehicle, the occupant rushes backward. On the one hand, the ECU23 opens the one-way valve B1-17 and controls the opening degree of the one-way valve B1-17 in real time according to the collision speed. Under the pressure of the occupant's back, the air in the upper backrest airbag 1-7 is transmitted to the lower backrest airbag 1-8 through the pipeline B1-17. At this time, the stiffness of the upper backrest airbag 1-7 decreases, and the stiffness of the lower backrest airbag 1-8 increases, so that the occupant's back can sink into the upper backrest airbag 1-7, and the lower backrest airbag 1-8 can inhibit the backward movement of the occupant's waist, resulting in the overall backward rotation of the occupant's upper body. On the other hand, the ECU23 determines whether the top of the occupant's head exceeds the upper surface of the headrest 1-1 by 6 cm in the vertical direction; determines whether the occupant's head exceeds the left surface of the headrest 1-1 in the horizontal direction; and determines the headrest height. If the top of the occupant's head exceeds the upper surface of the headrest 1-1 by 6 cm, the ECU23 controls the inflation amount of the air supply device A1-18 to the headrest airbag B1-5 according to the collision speed and the headrest height. At this time, the headrest airbag B1-5 changes from the folded state to the inflated state, and the inflated headrest airbag B1-5 protrudes upward from the upper surface of the headrest 1-1. Thereafter, the magnet A1-10 at the top of the headrest airbag B1-5 is attracted to the roof magnet A1-12, so that the headrest 1-1 and the headrest airbag B1-5 jointly support the occupant's head, effectively inhibiting the backward movement of the head. If the occupant's head exceeds the left surface of the headrest 1-1, the ECU23 controls the air supply device A1-18 to fill the headrest airbag C1-6 with air according to the collision speed. At this time, the headrest airbag C1-6 changes from the folded state to the inflated state, and the inflated headrest airbag C1-6 protrudes leftward from the left surface of the headrest 1-1. Thereafter, the magnet B1-11 at the left end of the headrest airbag C1-6 is attracted to the B-pillar magnet 1-13, so that the headrest 1-1 and the headrest airbag C1-6 jointly support the occupant's head, effectively inhibiting the backward movement of the head. Ultimately, the occupant's neck injury is avoided or reduced to the greatest extent.

[0076] After a frontal collision or a rear-end collision ends, the multifunctional intelligent seat device is turned off.

[0077] Specifically, in step (4), the ECU 23 controls the opening degree of the one-way valve A1-16 in real time according to the frontal collision speed, so as to control the air release rate, air release volume of the seat cushion airbag 1-9, and the inflation rate and inflation volume of the headrest airbag A1-4. The air release rate, air release volume of the seat cushion airbag 1-9, and the inflation rate and inflation volume of the headrest airbag A1-4 are related to the frontal collision speed, and their corresponding relationships are obtained through tests or simulations. In step (5), the inflation volume of the headrest airbag B1-5 is related to the rear-end collision speed and the headrest height, and its corresponding relationship is obtained through tests or simulations; the inflation volume of the headrest airbag C1-5 is related to the rear-end collision speed, and its corresponding relationship is obtained through tests or simulations; the air release rate and air release volume of the upper backrest airbag 1-7, and the inflation rate and inflation volume of the lower backrest airbag 1-8 are related to the rear-end collision speed, and their corresponding relationships are obtained through tests or simulations.

[0078] In Embodiment 2, the multifunctional intelligent seat device is applied to a three-person seat. The multifunctional intelligent seat device includes a left seat frame 2-1, a middle seat frame 2-2, a right seat frame 2-3, a sleeve A2-4, a sleeve B2-5, a sleeve C2-6, a sleeve D2-7, a convex platform 2-8, a rotating shaft A2-9, a transmission shaft 2-10, a rotating shaft B2-11, a bevel gear A2-12, a bevel gear B2-13, a bevel gear C2-14, a bevel gear D2-15, a connecting piece A2-16, a connecting piece B2-17, a flat plate 2-18, an airbag 2-19, a magnet 2-20, a roof magnet B2-21, a gas supply device B2-22, a gas supply pipeline B2-23, a lateral speed sensor 2-24, a camera B2-25, and an ECU 23.

[0079] The left seat frame 2-1 is located on the far left; the middle seat frame 2-2 is located on the right of the left seat frame 2-1, and the left seat frame 2-1 is fixedly connected to the middle seat frame 2-2; the right seat frame 2-3 is located on the right of the middle seat frame 2-2, and a rotating hinge is provided between the middle seat frame 2-2 and the right seat frame 2-3, and the right seat frame 2-3 can rotate around the right side of the middle seat frame 2-2. When the left seat frame 2-1, the middle seat frame 2-2, and the right seat frame 2-3 are in the initial position, the three frames are in the same plane. The left seat frame 2-1, the middle seat frame 2-2, and the right seat frame 2-3 are the frames of the left seat, the middle seat, and the right seat respectively. The rotating shaft A2-9, the transmission shaft 2-10, and the rotating shaft B2-12 are cylindrical.

[0080] Taking the forward driving direction of the vehicle as a reference, the sleeve A2-4 is fixedly installed at the front right end of the middle seat frame 2-2, and the sleeve B2-5 is fixedly installed at the rear right end of the middle seat frame 2-2. The front and rear ends of the rotating shaft A2-9 are respectively inserted into the sleeve A2-4 and the sleeve B2-5, and the rotating shaft A2-9 can rotate in the sleeve A2-4 and the sleeve B2-5. The connecting piece A2-16 and the connecting piece B2-17 are fixedly connected to the left end of the right seat frame 2-3, and the connecting piece A2-16 is located in front of the connecting piece B2-17. The rotating shaft A2-9 passes through the round holes at the left ends of the connecting piece A2-17 and the connecting piece B2-18, and the rotating shaft A2-9 is fixedly connected to the connecting piece A2-17 and the connecting piece B2-18. The sleeve C2-6 is fixedly installed at the front right end of the right seat frame 2-3, and the sleeve D2-7 is fixedly installed at the rear right end of the right seat frame 2-3. The front and rear ends of the rotating shaft B2-11 are respectively inserted into the sleeve C2-6 and the sleeve D2-7, and the rotating shaft B2-11 can rotate in the sleeve C2-6 and the sleeve D2-7. A concave platform is provided in the middle section of the rotating shaft B2-11, and the flat plate 2-18 is horizontally installed on the upper surface of the concave platform. Usually, the airbag 2-19 is folded and stored on the flat plate 2-18. The top end of the airbag 2-19 is fixedly connected to the magnet 2-20. The air supply device B2-22 can fill the airbag 2-19 with air through the air supply pipeline B2-23 to make it expand, and the expanded airbag 2-19 rushes upward out of the surface of the right seat.

[0081] The transmission shaft 2-10 is horizontally placed at the rear end of the right seat frame 2-3 and is perpendicular to the rotating shaft A2-9 and the rotating shaft B2-11. The convex platform 2-8 is fixedly installed at the rear end of the right seat frame 2-3, and the transmission shaft 2-10 passes through the round hole at the upper end of the convex platform 2-8 with a clearance. The bevel gear A2-12 is fixedly installed at the rear end of the rotating shaft A2-9, between the sleeve B2-5 and the connecting piece B2-17, and the tooth tip of the bevel gear A2-12 faces forward. The bevel gear D2-15 is fixedly installed at the rear end of the rotating shaft B2-11, between the sleeve D2-15 and the flat plate 2-18, and the tooth tip of the bevel gear D2-15 faces forward. The bevel gear B2-13 is fixedly installed at the left end of the transmission shaft 2-10, the tooth tip of the bevel gear B2-13 faces left, and the bevel gear A2-12 meshes with the bevel gear B2-13; the bevel gear C2-14 is fixedly installed at the right end of the transmission shaft 2-10, the tooth tip of the bevel gear C2-14 faces right, and the bevel gear C2-14 meshes with the bevel gear D2-15.

[0082] The roof magnet B2-21 is located above the right seat frame 2-3 and is fixedly connected to the roof.

[0083] The lateral speed sensor 2-24 is installed on the vehicle body to detect the lateral speed of the vehicle body in real time and send the detection information to the ECU 23. The ECU 23 determines whether a side collision occurs to the motor vehicle and determines the collision speed according to the lateral speed of the vehicle body detected by the lateral speed sensor 2-24 in real time. The camera B2-25 is fixedly installed on the front row roof to capture images of the three-person seat in real time and send the image information to the ECU 23. The ECU 23 determines whether there are occupants in the middle seat and the right seat and the height of the right side of the right seat frame relative to the floor according to the image information captured by the camera B2-25 in real time. The ECU 23 is the core of the entire device and can be integrated into the central controller of the vehicle. The ECU 23 is connected to the air supply device B2-22, the lateral speed sensor 2-24, and the camera B2-25.

[0084] When there is no occupant in the right seat, with the forward driving direction of the vehicle as the reference, the occupants in other seats cause the right seat frame 2-3 to rotate counterclockwise by 90 degrees around the right side of the middle seat frame 2-2. Eventually, the right seat frame 2-3 is perpendicular to the middle seat frame 2-2 to save the interior space of the vehicle. During the process of the right seat frame 2-3 rotating counterclockwise by 90 degrees, the right seat frame 2-3 drives the rotating shaft A2-9 and the bevel gear A2-12 to rotate counterclockwise through the force transmission of the connecting piece A2-16 and the connecting piece B2-17. The bevel gear A2-12 meshes with the bevel gear B2-13. With the lateral left direction of the vehicle as the reference, the bevel gear A2-12 drives the bevel gear B2-13 and the transmission shaft 2-10 to rotate clockwise, and the bevel gear C2-14 rotates clockwise accordingly. The bevel gear C2-14 meshes with the bevel gear D2-15. With the forward driving direction of the vehicle as the reference, the bevel gear C2-14 drives the bevel gear D2-15 and the rotating shaft B2-11 to rotate clockwise, and the flat plate rotates clockwise accordingly. Eventually, when the right seat frame 2-3 rotates counterclockwise by 90 degrees, the flat plate 2-18 rotates clockwise by 90 degrees, and the flat plate 2-18 and the airbag 2-19 are still in the horizontal position.

[0085] After that, when an occupant sits on the right seat, with the forward driving direction of the vehicle as the reference, the occupant causes the right seat frame 2-3 to rotate clockwise by 90 degrees around the right side of the middle seat frame 2-2 to restore the horizontal position. Through the force transmission of the connecting piece A2-16, the connecting piece B2-17, the rotating shaft A2-9, the bevel gear A2-12, the bevel gear B2-13, the transmission shaft 2-10, the bevel gear C2-14, the bevel gear D2-15, and the rotating shaft B2-11, eventually the flat plate 2-18 and the airbag 2-19 are restored to the horizontal position.

[0086] In order to achieve the protection effect of the present invention in Embodiment 2, it is realized through the following control method:

[0087] (1) After the motor vehicle starts, the driver turns on the multi-functional intelligent seat device.

[0088] (2) The lateral speed sensor 2-24 detects the lateral speed of the vehicle body in real time, the camera B2-25 takes images of the three-person seat in real time, and the ECU23 judges whether the motor vehicle has a side collision and determines the collision speed according to the detection information of the lateral speed sensor 2-24; the ECU23 judges whether there are occupants in the middle seat and the right seat and the height of the right side of the right seat frame relative to the floor according to the detection information of the camera B2-25.

[0089] (3) When the motor vehicle suffers a side collision from the left side of the vehicle, the ECU23 determines the side collision speed and whether there are occupants in the middle seat and the right seat. If there are no occupants in both the middle seat and the right seat, the ECU23 does not issue any instructions; if there is an occupant in the right seat, at this time the middle seat frame 2-2 and the right seat frame 2-3 are in a horizontal position, the flat plate 2-18 and the airbag 2-19 are in a horizontal position, and the ECU23 controls the inflation amount of the airbag 2-19 in the air supply device B2-22 according to the side collision speed and the height of the right side of the right seat frame 2-3 relative to the floor. The airbag 2-19 changes from a folded state to an inflated state, and the inflated airbag 2-19 rushes upward out of the upper surface of the right seat. After that, the magnet 2-20 at the top of the airbag 2-19 is attracted to the roof magnet B2-21, so that the airbag 2-19 can prevent the occupant from hitting the interior parts on the right side of the vehicle, and maximally avoid or reduce the injury of the occupant; if there is an occupant in the middle seat and no occupant in the right seat, at this time the right seat frame 2-3 is perpendicular to the middle seat frame 2-2, the flat plate 2-18 and the airbag 2-19 are in a horizontal position, and the ECU23 controls the inflation amount of the airbag 2-19 in the air supply device B2-22 according to the side collision speed and the height of the right side of the right seat frame 2-3 relative to the floor. The airbag 2-19 changes from a folded state to an inflated state, and the inflated airbag 2-19 rushes upward out of the right surface of the right seat. After that, the magnet 2-20 at the top of the airbag 2-19 is attracted to the roof magnet B2-21, so that the airbag 2-19 can prevent the occupant from hitting the interior parts on the right side of the vehicle, and maximally avoid or reduce the injury of the occupant.

[0090] (4) After the side collision ends, turn off the multi-functional intelligent seat device.

[0091] Specifically, in step (3), the inflation amount of the airbag 2-19 is related to the side collision speed and the relative position of the middle seat frame 2-2 and the right seat frame 2-3, and the corresponding relationship is obtained by experiments or simulations.

[0092] The connection relationship between the above-mentioned middle seat and the right seat can be symmetrically implemented on the left seat and the middle seat.

[0093] It should be noted that the orientation indicators such as up, down, left, right, front, and back involved in the present invention are only used to conveniently describe the present invention and are not used to limit the protection scope of the present invention. They are consistent with the corresponding up, down, left, right, front, and back in the conventional use of motor vehicles.

[0094] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation modes of the present invention, and they are not used to limit the protection scope of the present invention. Any equivalent modes or changes that do not depart from the technology created by the present invention should be included in the protection scope of the present invention.

Claims

1. Multifunctional intelligent single-seat device, characterized in that Comprising: A seat system, a vehicle speed sensor (22), and an ECU; the seat system includes a headrest (1-1), a backrest (1-2), a seat cushion (1-3), a headrest airbag A (1-4), a headrest airbag B (1-5), a headrest airbag C (1-6), an upper backrest airbag (1-7), a lower backrest airbag (1-8), a seat cushion airbag (1-9), a magnet A (1-10), a magnet B (1-11), a roof magnet A (1-12), a B-pillar magnet (1-13), a pipe A (1-14), a pipe B (1-15), a one-way valve A (1-16), a one-way valve B (1-17), a gas supply device A (1-18), a gas supply pipe A (1-19), a camera A (1-20), a headrest height sensor (1-21), and a vehicle speed sensor (22); The headrest (1-1) is located above the backrest (1-2) and the seat cushion (1-3), and the headrest (1-1) is fixedly connected to the upper end of a headrest guide rod, and the lower end of the headrest guide rod is inserted into the backrest (1-2), and a seat cushion (1-3) is connected in front of the bottom end of the backrest (1-2); The headrest airbag A (1-4), the headrest airbag B (1-5), and the headrest airbag C (1-6) are respectively folded and stored at the front end, the top end, and the left end of the headrest; the top end of the headrest airbag B (1-5) is fixedly connected to the magnet A (1-10), and the left end of the headrest airbag C (1-6) is fixedly connected to the magnet B (1-11); The upper backrest airbag (1-7) is fixed to the upper end of the front surface of the backrest; The lower backrest airbag (1-8) is fixed to the lower end of the front surface of the backrest; The seat cushion airbag (1-9) is fixedly installed inside the seat cushion; The roof magnet A (1-12) is located above the headrest and is fixedly connected to the roof; the B-pillar magnet (1-13) is installed inside the B-pillar, The pipe A (1-14) is installed inside the headrest and the backrest and is used to connect the headrest airbag A (1-4) and the seat cushion airbag (1-9); the pipe B (1-15) is installed inside the backrest and is used to connect the upper backrest airbag and the lower backrest airbag; The one-way valve A (1-16) and the one-way valve B (1-17) are respectively located inside the pipe A and the pipe B. The one-way valve A can transmit the gas in the seat cushion airbag to the headrest airbag A, and the one-way valve B can transmit the gas in the upper backrest airbag to the lower backrest airbag; The gas supply device A (1-18) can, through the gas supply pipe A (1-19), fill the headrest airbag B (1-5) and the headrest airbag C (1-6) with air to make them expand; The camera A (1-20) is used to photograph the position of the occupant's head relative to the headrest in real time and send the image information to the ECU (23). The ECU judges whether the top of the occupant's head exceeds the upper surface of the headrest by 6 cm in the vertical direction according to the image information photographed by the camera A (1-20); In the horizontal direction, whether the occupant's head exceeds the left surface of the headrest; The headrest height sensor (1-21) is used to detect the height of the upper surface of the headrest relative to the vehicle floor in real time, that is, the headrest height, and send the detection information to the ECU (23); The vehicle speed sensor (22) is installed on the vehicle body and is used to detect the driving speed of the vehicle in real time and send the detection information to the ECU (23). The ECU determines whether the motor vehicle has a frontal collision or a rear-end collision based on the vehicle driving speed detected by the vehicle speed sensor in real time, and determines the collision speed. The ECU (23) is respectively connected to the check valve A (1-16), the check valve B (1-17), the air supply device A (1-18), the vehicle speed sensor (22), the camera A (1-20), and the headrest height sensor (1-21) through different ports. The ECU (23) controls the check valve A (1-16), the check valve B (1-17), and the air supply device A (1-18).

2. The multifunctional intelligent single-seat device according to claim 1, characterized in that, The upper backrest airbag (1-7) is in the shape of a cuboid and is fixed to the upper end of the front surface of the backrest in a semi-embedded manner. The back surface of the upper backrest airbag (1-7) is the common front surface of the backrest. The upper surface, the left surface, and the right surface of the upper backrest airbag are flush with the upper surface, the left surface, and the right surface of the backrest respectively. The lower backrest airbag (1-8) is in the shape of a cuboid and is fixed to the lower end of the front surface of the backrest in a semi-embedded manner. The back surface of the lower backrest airbag is the common front surface of the backrest. The left surface and the right surface of the lower backrest airbag are flush with the left surface and the right surface of the backrest respectively. The lower surface of the upper backrest airbag is attached to the upper surface of the lower backrest airbag. The seat cushion airbag (1-9) is fixedly installed in the seat cushion in a fully embedded manner, and the upper surface of the seat cushion airbag is flush with the upper surface of the seat cushion.

3. The multifunctional intelligent single-seat device according to claim 1, characterized in that, When the vehicle is in normal use, the upper backrest airbag (1-7), the lower backrest airbag (1-8), and the seat cushion airbag (1-9) are filled with air. The upper backrest airbag, the lower backrest airbag, and the seat cushion airbag together with the backrest and the seat cushion form the outer contour of the seat system. When the occupant sits on the seat cushion airbag, the upper backrest airbag and the lower backrest airbag can support the back and waist of the occupant.

4. The multifunctional intelligent single-seat device according to claim 1, characterized in that, The roof magnet A (1-12) can be attracted to the magnet A (1-10), and the B-pillar magnet (1-13) can be attracted to the magnet B (1-11). The opening degrees of the check valve A (1-16) and the check valve B (1-17) are adjustable.

5. The multifunctional intelligent single-seat device according to claim 1, characterized in that, The camera A (1-20) is fixedly installed on the rear roof, the headrest height sensor is installed in the headrest, and the ECU is integrated in the central controller of the vehicle.

6. The control method of the multifunctional intelligent single-seat device according to any one of claims 1-5, characterized in that, It includes the following: (1) After the motor vehicle is started, the multifunctional intelligent seat device is turned on. (2) The vehicle speed sensor (22) detects the driving speed of the vehicle in real time, the headrest height sensor (1-21) detects the headrest height in real time. The ECU (23) determines whether the motor vehicle has a frontal collision or a rear-end collision based on the detection information of the vehicle speed sensor, and determines the collision speed. The ECU determines the headrest height based on the detection information of the headrest height sensor. (3) The camera A (1-20) takes pictures of the position of the occupant's head relative to the headrest in real time. The ECU determines whether the top of the occupant's head exceeds the upper surface of the headrest by 6 cm in the vertical direction based on the detection information of the camera A. In the horizontal direction, whether the occupant's head exceeds the left surface of the headrest. (4) When a frontal collision occurs to a motor vehicle, in the early stage of the frontal collision, the occupant rushes forward. The ECU (23) opens the one-way valve A (1 - 16) and controls the opening degree of the one-way valve A (1 - 16) in real time according to the collision speed. Under the pressure of the occupant, the air in the seat cushion airbag is transmitted through the pipeline A (1 - 14) into the headrest airbag A (1 - 4). At this time, on the one hand, the seat cushion airbag deflates, and the occupant sinks into the seat cushion airbag, thereby absorbing the forward impact energy of the occupant and avoiding or reducing the occupant injury to the greatest extent; on the other hand, the headrest airbag A (1 - 4) changes from the folded state to the inflated state, and the inflated headrest airbag A protrudes forward from the front surface of the headrest; in the late stage of the frontal collision, during the process of the occupant resetting backward, compared with the headrest, the inflated headrest airbag A can support the occupant's head in advance, avoiding or reducing the occupant's neck injury to the greatest extent; (5) When a rear-end collision occurs to a motor vehicle, the occupant rushes backward. On the one hand, the ECU opens the one-way valve B (1 - 17) and controls the opening degree of the one-way valve B (1 - 17) in real time according to the collision speed. Under the pressure of the occupant's back, the air in the upper backrest airbag (1 - 7) is transmitted through the pipeline B (1 - 15) into the lower backrest airbag (1 - 8). At this time, the stiffness of the upper backrest airbag decreases, and the stiffness of the lower backrest airbag increases, so that the occupant's back can sink into the upper backrest airbag, and the lower backrest airbag can inhibit the backward movement of the occupant's waist, resulting in the overall backward rotation of the occupant's upper body; on the other hand, the ECU (23) determines whether the occupant's head top exceeds the upper surface of the headrest by 6 cm in the vertical direction; determines whether the occupant's head exceeds the left surface of the headrest in the horizontal direction; and determines the headrest height. If the occupant's head top exceeds the upper surface of the headrest by 6 cm, the ECU controls the inflation amount of the air supply device A (1 - 18) into the headrest airbag B (1 - 5) according to the collision speed and the headrest height. At this time, the headrest airbag B changes from the folded state to the inflated state, and the inflated headrest airbag B protrudes upward from the upper surface of the headrest. Thereafter, the magnet A (1 - 10) at the top of the headrest airbag B is attracted to the roof magnet A (1 - 12), so that the headrest (1 - 1) and the headrest airbag B (1 - 5) jointly support the occupant's head, effectively inhibiting the backward movement of the head; if the occupant's head exceeds the left surface of the headrest, the ECU (23) controls the air supply device A (1 - 18) to fill the headrest airbag C (1 - 6) with air according to the collision speed. At this time, the headrest airbag C changes from the folded state to the inflated state, and the inflated headrest airbag C protrudes leftward from the left surface of the headrest. Thereafter, the magnet B (1 - 11) at the left end of the headrest airbag C is attracted to the B-pillar magnet (1 - 13), so that the headrest and the headrest airbag C (1 - 6) jointly support the occupant's head, effectively inhibiting the backward movement of the head, and ultimately avoiding or reducing the occupant's neck injury to the greatest extent; (6) After the frontal collision or rear-end collision ends, the multifunctional intelligent seat device is closed.

7. The control method of the multifunctional intelligent single-seat device according to claim 6, characterized in that, In step (4), the air release rate and air release volume of the seat cushion airbag (1-9), and the inflation rate and inflation volume of the headrest airbag A (1-4) are related to the frontal collision speed, and their corresponding relationships are obtained through tests or simulations; in step (5), the inflation volume of the headrest airbag B (1-5) is related to the rear-end collision speed and the headrest height, and its corresponding relationship is obtained through tests or simulations; the inflation volume of the headrest airbag C (1-6) is related to the rear-end collision speed, and its corresponding relationship is obtained through tests or simulations; the air release rate and air release volume of the upper backrest airbag, and the inflation rate and inflation volume of the lower backrest airbag are related to the rear-end collision speed, and their corresponding relationships are obtained through tests or simulations.

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