JP2018149891A - Vehicle seat, vehicle seat control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat, a vehicle seat control method, and a program capable of protecting an occupant and simplifying an apparatus configuration in the event of a vehicle collision. SOLUTION: In a vehicle seat, a seating portion that is rotatable in a substantially yaw direction around a rotation axis that does not pass through the center of gravity of the seat, and the seating portion are fixed by restricting the rotation of the seating portion to obtain an acceleration acting on the vehicle. A fixing portion for releasing the fixing of the seating portion is provided accordingly. [Selection diagram] Fig. 1

Description

  The present invention relates to a vehicle seat, a vehicle seat control method, and a program.

  Research has been conducted on technologies for improving passenger safety in the event of a vehicle collision. For example, according to the technique described in Patent Document 1, a collision is detected, the seat belt is wound up, the slack of the seat belt is eliminated, and the degree to which the occupant is restrained by the seat at the time of the collision is enhanced.

Japanese Patent Laid-Open No. 06-255447

  According to the invention described in Patent Literature 1, there is a possibility that the restraining force of the seat belt may increase the burden on the occupant's body depending on the collision direction when the vehicle collides.

  The present invention has been made in view of such circumstances, and provides a vehicle seat, a vehicle seat control method, and a program capable of protecting an occupant and simplifying a device configuration at the time of a vehicle collision. For the purpose.

  According to the first aspect of the present invention, the seating portion that is rotatable in the yaw direction around the rotation axis that does not pass through the center of gravity of the seat, the rotation of the seating portion is regulated to fix the seating portion, and the acceleration acting on the vehicle And a fixing portion that releases the fixing of the seating portion accordingly.

  A second aspect of the present invention is the vehicle seat according to the first aspect, wherein the rotation shaft is separated from the position of the center of gravity of the seat in the front-rear direction of the vehicle.

  A third aspect of the present invention is the vehicle seat according to the first aspect, wherein the rotation shaft is separated from the position of the center of gravity of the seat in the vehicle width direction of the vehicle.

  A fourth aspect of the invention is the vehicle seat according to the second or third aspect, further comprising a drive unit that applies a rotational driving force around the rotation axis to the seating unit.

  The invention according to claim 5 is the vehicle seat according to claim 4, further comprising a prediction unit that predicts that acceleration is applied to the vehicle seat, and the drive unit is subjected to acceleration by the prediction unit. When this is expected, a rotational driving force around the rotational axis is applied to the seating portion.

The invention according to claim 6 is the vehicle seat according to claim 5, which is driven in one direction,
The seating portion and the output shaft of the driving portion are connected to each other, and a one-way clutch that freely rotates the seating portion selectively in a direction in which the driving portion is driven is further provided.

  Invention of Claim 7 is a vehicle seat group provided with two or more said vehicle seats of any one of Claim 2-6, Comprising: The separation direction in the said vehicle width direction of the said rotating shaft is adjacent. The rotation axis of the vehicle seat coincides with the separation direction in the vehicle width direction.

  In the invention according to claim 8, the computer acquires information about the surroundings of the vehicle, predicts that acceleration is applied to the vehicle based on the surrounding information, and applies acceleration of a predetermined level or more to the vehicle. In a case where the vehicle seat is to be released, the lock mechanism is released, the drive unit is controlled, and a seating unit that is rotatable in the yaw direction around the rotation axis that does not pass through the center of gravity of the seat is applied. It is a control method.

  The invention according to claim 9 causes a computer to acquire information on the surroundings of the vehicle, predicts that acceleration is applied to the vehicle based on the surrounding information, and applies acceleration of a predetermined level or more to the vehicle. A program that releases the lock mechanism and controls the drive unit to give a rotational drive force around the rotation axis to the seating unit that can rotate in the yaw direction around the rotation axis that does not pass through the center of gravity of the seat. is there.

  According to the first, second, and third aspects of the present invention, when the rotation axis does not pass through the center of gravity of the seat, the fixed portion is released due to the inertial force of the seat device when an acceleration greater than a predetermined value is generated in the vehicle. By rotating the seating portion, the occupant can be received by the seat back portion.

  According to the fourth aspect of the present invention, when the driving unit gives a rotational driving force to the seating unit, when the acceleration of the vehicle exceeds a predetermined value, the occupant can be received by the seat back portion.

  According to the fifth aspect of the present invention, the driver rotates the seat before the acceleration of a predetermined level or more occurs in the vehicle, so that the occupant can be protected at a faster stage.

  According to the sixth aspect of the present invention, the seating portion is provided by the inertial force generated in the seat device even after the drive unit is stopped due to the provision of the one-way clutch or when an inertial force larger than the drive force is applied. Can be rotated.

  According to the seventh aspect of the present invention, the rotation shafts are provided in the respective seat devices so that the adjacent seat devices rotate in the same direction, so that the legs of the respective occupants sitting in the respective seat devices. It is possible to prevent the parts from contacting each other and improve the safety of the passenger.

  According to the eighth and ninth aspects of the present invention, the seating portion is rotated before the predetermined acceleration is generated in the vehicle by determining that the predetermined acceleration or higher is generated in the vehicle according to the surrounding state. Can protect passengers early.

It is a left view which shows the vehicle seat 10 of 1st Embodiment. 1 is a front view showing a configuration of a vehicle seat 10. 1 is a plan view showing a configuration of a vehicle seat 10. It is a figure which shows the state by which the 2nd fixing member 15b was released from the 1st fixing member 15a. It is a figure showing the state where vehicle seat 10 was reversed. 2 is a diagram illustrating a state in which acceleration G is applied from the rear of a vehicle M. FIG. It is a left view which shows the vehicle seat 10 of 2nd Embodiment. 1 is a front view showing a configuration of a vehicle seat 10. 1 is a plan view showing a configuration of a vehicle seat 10. It is a figure which shows the state by which the 2nd fixing member 15b was released from the 1st fixing member 15a. It is a figure showing the state where vehicle seat 10 was reversed. 2 is a diagram illustrating a state in which acceleration G is applied from the rear of a vehicle M. FIG. It is a front view which shows the structure of the vehicle seat 20 of 3rd Embodiment. 1 is a block diagram illustrating a configuration of a seat control system 1. FIG. 3 is a flowchart showing processing of the sheet control system 1. It is a top view which shows the vehicle seat group 100 of 4th Embodiment. FIG. 2 is a plan view showing a state in which each vehicle seat 10 of the vehicle seat group 100 rotates. It is a figure which shows the modification of the fixing member. It is a figure which shows the other modification of the fixing member.

<First Embodiment>
A vehicle (hereinafter referred to as a vehicle M) on which the vehicle seat 10 is mounted is, for example, a vehicle such as a two-wheel, three-wheel, or four-wheel vehicle, and a drive source thereof is an internal combustion engine such as a diesel engine or a gasoline engine, an electric motor, These are combinations. The electric motor operates using electric power generated by a generator connected to the internal combustion engine or electric discharge power of a secondary battery or a fuel cell.

  Hereinafter, the vehicle seat 10 of 1st Embodiment is demonstrated. FIG. 1 is a left side view showing a vehicle seat 10 of the first embodiment. The vehicle seat 10 includes, for example, a seating part 11 and a backrest part 12. In the vehicle seat 10, one end of the seat portion 11 and a lower end of the backrest portion 12 are rotatably connected by a first connecting portion 18. A headrest 13 is provided at the upper end of the backrest 12.

  The seating part 11 is a member that supports the lower half of the occupant. The seat portion 11 is formed with a seat surface 11a on which an occupant sits. The seat surface 11a is formed of a cushioning material. The seating part 11 is attached to the floor surface F via the rotary connection part 14. The seating part 11 is arranged so as to be rotatable around the rotation axis L <b> 1 with respect to the floor surface F by the rotation connecting part 14. The rotation connecting portion 14 is arranged in the seating portion 11 so that the rotation axis L1 is eccentric without passing through the seat center of gravity g in the front-rear direction (≈X direction).

  The backrest 12 is a member that supports the trunk of the occupant. As for the backrest part 12, the backrest surface 12a is formed. The backrest surface 12a is formed of a cushioning material. A headrest 13 is provided at the tip of the backrest 12. The headrest 13 supports the head or neck of an occupant seated on the seat 11. The backrest portion 12 can be in a reclining state with a rotation angle with respect to the floor surface F by the first connecting portion 18. The 1st connection part 18 has a rotation hinge structure, for example.

  The first connecting portion 18 includes, for example, a biasing means (not shown) such as a rotary spring, and biases the backrest portion 12 in a direction (+ X direction) in which an angle formed between the backrest portion 12 and the seating portion 11 is narrowed. Yes. The first connecting portion 18 includes a lock mechanism (not shown) interlocked with the lever 17 provided in the seating portion 11.

  When the lever 17 is released, the backrest portion 12 falls forward (+ X direction) about the first connecting portion 18 by the urging force of the first connecting portion 18. When the occupant applies a force rearward (−X direction) to the backrest surface 12 a in the released state of the lever 17, the backrest portion 12 falls backward about the first connecting portion 18. In this way, the occupant can adjust the reclining angle of the backrest 12. The above-described configuration of the first connecting portion 18 is a mechanical type, but the first connecting portion 18 may be electrically controlled, and any configuration can be used as long as the angle can be adjusted, such as a stepping motor or an actuator. May be used. When the first connecting unit 18 is electrically driven, the first connecting unit 18 is controlled by the seat control unit 160.

  FIG. 2 is a front view showing the configuration of the vehicle seat 10. As shown in the figure, the rotary connecting portion 14 includes a first connecting member 14a and a second connecting member 14b. The first connecting member 14 a is fixed to the lower surface of the seating portion 11. The second connecting member 14b is fixed to the floor surface F. The first connecting member 14a and the second connecting member 14b are connected so as to be relatively rotatable. As a result, the seat portion 11 is rotatable in the yaw direction relative to the floor surface F around the rotation axis L1.

  A fixing member (fixing portion) 15 is provided on the lower surface of the seating portion 11 so as to face the rotation connecting portion 14 in the vehicle width direction. The fixing member 15 restricts the rotation of the seat portion 11 in the yaw direction. The fixing member 15 includes a first fixing member 15a and a second fixing member 15b. The first fixing member 15 a is fixed to the lower surface of the seating portion 11. The second fixing member 15b is fixed to the floor surface F. The first fixing member 15a and the second fixing member 15b are fitted to each other, and maintain a fixed state unless a predetermined force or more is applied.

  The second fixing member 15b is formed as a rectangular plate-like body, for example. The second fixing member 15b is fixed upright with respect to the floor surface F. The plate surface of the second fixing member 15b is disposed along the left-right direction (Y direction). The 1st fixing member 15a is formed in the shape which clamps the 2nd fixing member 15b with a frictional force, for example.

  FIG. 3 is a plan view showing the configuration of the vehicle seat 10. The predetermined fastening force between the first fixing member 15a and the second fixing member 15b is adjusted so that the second fixing member 15b is released from the first fixing member 15a when an acceleration greater than a predetermined value is applied to the vehicle seat 10. Has been. That is, the first fixing member 15a releases the second fixing member 15b according to the acceleration acting on the vehicle M.

  As shown in the figure, for example, when acceleration G in the deceleration direction is applied from the side (-Y direction) due to a collision or the like while traveling in the X direction with respect to the vehicle M on which the vehicle seat 10 is installed, the vehicle seat 10 (strictly In addition, the inertia force I in the direction opposite to the acceleration G acts on the vehicle seat 10 and the passenger sitting on the vehicle seat 10. That is, the vehicle seat 10 tends to move laterally (Y direction) relative to the floor surface F by the inertial force I.

  At this time, the seat belt restrains the occupant's body in a direction that prevents the occupant sitting on the vehicle seat 10 with the seat belt from being thrown forward. In this state, the rotation axis L1 of the rotary connecting portion 14 is separated from the horizontal center of gravity g of the vehicle seat 10 with respect to the vehicle width direction, so that the seating portion 11 is around the rotation axis L1 of the rotary connecting portion 14. Try to rotate to.

  When the acceleration G is less than a predetermined size set in advance, the first fixing member 15a and the second fixing member 15b remain connected, and the seating portion 11 does not rotate. When the acceleration G is equal to or greater than a predetermined size, the connection between the first fixing member 15a and the second fixing member 15b is released.

  FIG. 4 is a diagram illustrating a state in which the second fixing member 15b is released from the first fixing member 15a. As shown in the figure, the first fixing member 15a releases the second fixing member 15b in the + X direction from the state in which the second fixing member 15b is fastened with respect to the horizontal plane when an acceleration G greater than a predetermined value is applied to the vehicle seat 10. To do. When the connection between the first fixing member 15a and the second fixing member 15b is released, the seat portion 11 starts to freely rotate around the rotation axis L1 by the inertial force I. At this time, the occupant sitting on the vehicle seat 10 with the seat belt attached starts to rotate together with the seating portion 11.

  FIG. 5 is a diagram illustrating a state in which the vehicle seat 10 is reversed. As illustrated, the vehicle seat 10 is reversed with respect to the traveling direction by the inertial force I of the vehicle seat 10. At this time, inertial force I with respect to the traveling direction acts on the occupant, and the occupant's back is pressed toward the backrest 12.

  When the vehicle seat 10 does not rotate, the inertial force I acts on the occupant's body at the time of the collision, and the inertial force I acts in the direction in which the occupant's body is thrown forward. At this time, since the seat belt restrains the occupant's body so that the occupant is not thrown forward, the restraint force of the seat belt on the occupant's body becomes stronger. Accordingly, when the vehicle seat 10 does not rotate, the burden on the occupant's body at the time of collision increases. On the other hand, according to the vehicle seat 10, when acceleration G occurs due to a collision or the like, the occupant rotates in a direction in which the body is received by the vehicle seat 10 according to the rotation of the vehicle seat 10.

  Therefore, since the occupant's body is received by the backrest 12 by the rotation of the vehicle seat 10, the burden on the occupant's body is reduced. After the vehicle seat 10 is rotated, the first fixing member 15a and the second fixing member 15b may be fitted again by returning the vehicle seat 10 rotated by the occupant to the original position.

  FIG. 6 is a diagram illustrating a state in which the acceleration G is applied from the rear of the vehicle M. As shown in the figure, for example, when acceleration G is applied from the rear (X direction) to the vehicle M on which the vehicle seat 10 is installed due to a collision or the like, an inertial force I facing backward (−X direction) is applied to the seating portion 11. As a result, the vehicle seat 10 does not rotate. Therefore, in the case of a rear collision, the occupant's body sitting on the vehicle seat 10 is received by the backrest 12.

  According to the vehicle seat 10 of the first embodiment described above, when a collision occurs in the vehicle M, the seating portion 11 rotates in a direction in which the occupant is received by the backrest portion 12, thereby reducing the physical burden on the occupant. it can. Further, according to the vehicle seat 10, the seating portion 11 can be rotated according to the acceleration that the fixing member 15 acts on the vehicle at the time of a collision. Therefore, the seating portion 11 does not rotate at an acceleration less than a predetermined value, and the seating portion 11 frequently Therefore, it is possible to improve the safety.

Second Embodiment
In the vehicle seat 10 of the first embodiment, the rotation connecting portion 14 is eccentric without the rotation axis L1 passing through the center of gravity g of the seat in the front-rear direction (≈X direction). In the vehicle seat 210 according to the second embodiment, the rotary connecting portion 14 is eccentric with respect to the vehicle width direction (≈Y direction) of the vehicle M. In the following description, the same names and reference numerals are used for the same configurations as those in the first embodiment, and overlapping descriptions are omitted as appropriate.

  7 and 8 are views illustrating a vehicle seat 210 according to the second embodiment. As shown in the figure, the rotation connecting portion 14 is disposed in the seating portion 11 so that the rotation axis L1 is eccentric without passing through the seat center of gravity g in the left-right direction (≈Y direction) of the vehicle M. The position of the rotational connecting portion 14 with respect to the center of gravity g of the sheet is exemplified as being eccentric in the −Y direction, but may be eccentric in the + Y direction on the opposite side. In that case, the rotation direction of the vehicle seat 210 is on the opposite side. And as for the 2nd fixing member 15d, the plate | board surface is arrange | positioned along the advancing direction (X direction).

  FIG. 9 is a plan view showing the configuration of the vehicle seat 210. The first fixing member 15c regulates the moving direction of the second fixing member 15d so that the yaw rotation direction of the seating portion 11 becomes constant when the second fixing member 15d is released. In the drawing, the first fixing member 15c regulates the second fixing member 15d so that the seating portion 11 rotates counterclockwise.

  FIG. 10 is a diagram illustrating a state in which the second fixing member 15d is released from the first fixing member 15c. FIG. 11 is a diagram illustrating a state in which the vehicle seat 210 is inverted. As shown in the figure, when an acceleration G of a predetermined value or more is applied to the vehicle seat 210, the vehicle seat 210 rotates in the same manner as in the first embodiment.

  FIG. 12 is a diagram illustrating a state in which the acceleration G is applied from the rear of the vehicle M. As shown in the figure, when acceleration G is applied to the vehicle seat 210 from behind (X direction) due to a collision or the like, the connection between the first fixing member 15c and the second fixing member 15d is not released. That is, when an inertial force I in the backward direction (−X direction) is generated in the seating portion 11 and a force in a direction rotating in the clockwise direction is generated in the seating portion 11, the vehicle seat 210 does not rotate. That is, the fixing member 15 rotates the seating part 11 only in a predetermined direction at the time of a collision. Therefore, in the case of a rear collision, the occupant's body sitting on the vehicle seat 210 is received by the backrest 12.

  As described above, according to the vehicle seat 210 of the second embodiment, the seating portion 11 can be rotated according to the direction of the acceleration that the fixing member 15 acts on the vehicle at the time of collision, so that the physical burden on the occupant is reduced. At the same time, safety can be improved. And according to the vehicle seat 210, the configuration of the apparatus can be simplified because the fixing member 15 releases the connection in accordance with the acceleration acting on the vehicle without using complicated control.

<Third Embodiment>
The vehicle seat 210 of the second embodiment protects the occupant by passively rotating the seat portion 11 against the collision of the vehicle M. In the second embodiment, when acceleration is expected to be applied to the vehicle M, a rotational driving force around the rotation axis L1 is applied to the seating portion 11 to protect the occupant. In the following description, the description of the configuration common to the second embodiment will be omitted as appropriate.

  FIG. 13 is a front view showing the configuration of the vehicle seat 20 of the third embodiment. In the vehicle seat 20, a drive unit 14c and a one-way clutch 14d are added to the rotation coupling unit 14 of the vehicle seat 10 of the first embodiment. The vehicle seat 20 is provided with a lock mechanism (fixing portion) 16 instead of the fixing member 15 of the vehicle seat 10 of the first embodiment.

  The drive unit 14c is controlled by a sheet control unit 160 described later. For example, when it is expected that acceleration is applied, the driving unit 14c applies a rotational driving force around the rotational axis L1 to the seating unit 11. The drive unit 14c is, for example, a motor.

  The lock mechanism 16 is controlled by a seat control unit 160 described later. The lock mechanism 16 releases the restriction on the rotational direction of the seating part 11 when the drive part 14c is driven, and makes the seating part 11 rotatable about the rotation axis L1. The lock mechanism 16 includes, for example, a solenoid 16b and a plunger 16a, and restricts or releases the rotation of the seating portion 11 by moving the plunger 16a in the vertical direction. In the vehicle seat 20, a rotational driving force is applied in advance to the seating unit 11 by the driving unit 14 c before the collision of the vehicle M.

  The one-way clutch 14d transmits the rotational driving force of the driving unit 14c to the seating unit 11, and freely rotates the seating unit 11 in the rotational direction of the rotational driving force of the driving unit 14c. The one-way clutch 14d includes a mechanism that rotates the seat portion 11 in a predetermined rotation direction but does not rotate the seat portion 11 in a rotation direction opposite to the predetermined rotation direction. That is, the one-way clutch 14d selectively rotates the seating portion 11 selectively in the direction in which the drive portion 14c is driven. The one-way clutch 14d connects the seat portion 11 and the output shaft of the drive portion 14c. When the one-way clutch 14d is provided in the rotary connecting portion 14, after the driving portion 14c stops applying the rotational driving force to the seating portion 11, or when an inertial force I greater than the driving force is applied to the seating portion 11. In addition, the seat portion 11 can continue to rotate by the inertial force I.

  FIG. 14 is a block diagram illustrating a configuration of the seat control system 1. The seat control system 1 includes a vehicle seat 20, a collision determination unit (prediction unit) 50, and a seat control unit 160. The collision determination unit 50 includes, for example, a camera 51, a radar device 52, a finder 53, an object recognition device 54, and an external environment recognition unit 55. The collision determination unit 50 predicts in advance a collision that occurs in the vehicle M based on the state around the vehicle M.

  The vehicle seat 20 includes a drive unit 14 c that drives the rotary connecting unit 14. The sheet control unit 160 controls the drive unit 14 c based on the determination result of the collision determination unit 50. The external recognition unit 55 and the sheet control unit 160 are each realized by a processor (CPU) or the like executing a program (software). Some or all of the functional units of the sheet control unit 160 described below are implemented by hardware such as LSI (Large Scale Integration), ASIC (Application Specific Integrated Circuit), and FPGA (Field-Programmable Gate Array). It may be realized or may be realized by cooperation of software and hardware.

  The camera 51 is a digital camera using a solid-state image sensor such as a CCD (Charge Coupled Device) or a CMOS (Complementary Metal Oxide Semiconductor). One or a plurality of cameras 51 are attached to an arbitrary portion of the vehicle M to be mounted. When imaging the front, the camera 51 is attached to the upper part of the front windshield, the rear surface of the rearview mirror, or the like. When imaging the rear, the camera 51 is attached to the upper part of the rear windshield, the back door, or the like. When imaging the side, the camera 51 is attached to a door mirror or the like. For example, the camera 51 periodically images the periphery of the vehicle M repeatedly. The camera 51 may be a stereo camera.

  The radar device 52 radiates radio waves such as millimeter waves around the vehicle M and detects radio waves (reflected waves) reflected by the object to detect at least the position (distance and direction) of the object. One or a plurality of radar devices 52 are attached to any part of the vehicle M. The radar device 52 may detect the position and velocity of the object by FMCW (Frequency Modulated Continuous Wave) method.

  The finder 53 is LIDAR (Light Detection and Ranging or Laser Imaging Detection and Ranging) that measures the scattered light with respect to the irradiation light and detects the distance to the target. One or a plurality of viewfinders 53 are attached to any part of the vehicle M.

  The object recognition device 54 performs sensor fusion processing on detection results of some or all of the camera 51, the radar device 52, and the finder 53 to recognize the position, type, speed, and the like of the object. The object recognition device 54 outputs the recognition result to the external environment recognition unit 55.

  Based on information input from the camera 51, the radar device 52, and the finder 53 via the object recognition device 54, the external recognition unit 55 recognizes the positions, speeds, accelerations, and the like of surrounding vehicles. The position of the surrounding vehicle may be represented by a representative point such as the center of gravity or corner of the surrounding vehicle, or may be represented by an area expressed by the outline of the surrounding vehicle. The “state” of the surrounding vehicle may include acceleration and jerk of the surrounding vehicle, or “behavioral state” (for example, whether or not the lane is changed or is about to be changed).

  In addition to the surrounding vehicles, the external environment recognition unit 55 may recognize positions of guardrails, utility poles, parked vehicles, persons such as pedestrians, and other objects. Thereby, the external environment recognition unit 55 recognizes the state around the vehicle M and predicts a state in which acceleration is applied to the vehicle M due to a collision or the like. When the outside recognition unit 55 determines that a predetermined acceleration or more is applied to the vehicle M due to a collision or the like, the outside recognition unit 55 outputs the determination result to the seat control unit 160.

  The seat control unit 160 controls the drive unit 14 c and the lock mechanism 16 based on the determination result of the external environment recognition unit 55. When it is predicted that a predetermined acceleration or more is applied to the vehicle M due to a collision or the like, the seat control unit 160 releases the lock mechanism 16 and controls the driving unit 14c to apply a rotational driving force around the rotation axis L1 to the seating unit 11. give.

  Next, the process flow of the sheet control system 1 will be described. FIG. 15 is a flowchart showing processing of the seat control system 1. The external environment recognition unit 55 acquires information around the vehicle M based on information input from the camera 51, the radar device 52, and the finder 53 via the object recognition device 54 (step S100). The external environment recognition unit 55 predicts whether or not an acceleration of a predetermined level or more is applied to the vehicle M based on information around the vehicle M (step S101). When it is determined that an acceleration greater than or equal to a predetermined value is applied to the vehicle M, the external environment recognition unit 55 outputs a determination result to the seat control unit 160. The seat control unit 160 controls the lock mechanism 16 based on the determination result to release the lock of the seating unit 11, and controls the drive unit 14c to give the seating unit 11 a rotational driving force around the rotation axis L1 ( Step S102).

  According to the above-described seat control system 1 of the third embodiment, when it is predicted that a predetermined acceleration or more is applied to the vehicle M due to a collision or the like, the seating unit 11 is provided with a rotational driving force around the rotation axis L1 so as to be seated. The part 11 can be rotated before the collision. Further, in the vehicle seat 20 of the seat control system 1, after the one-way clutch 14d is provided in the rotary connecting portion 14, the driving portion 14c stops applying the rotational driving force to the seating portion 11, and When the inertial force I larger than the driving force is applied to the seating portion 11, the seating portion 11 can continue to rotate by the inertial force I.

<Fourth embodiment>
The vehicle seat 10 of the first embodiment protects the occupant by rotating the seat portion 11 against the collision of the vehicle M. In 4th Embodiment, the vehicle seat group 100 in which the several vehicle seat 10 is installed in the vehicle M is illustrated.

  FIG. 16 is a plan view showing the vehicle seat group 100 of the fourth embodiment. The vehicle seat group 100 includes a plurality of vehicle seats 10. In the vehicle seat group 100, for example, two vehicle seats 10 are juxtaposed along the vehicle width direction (Y-axis direction). Each vehicle seat 10 includes a rotation connecting portion 14, and each rotation connecting portion 14 is separated in the same direction in the vehicle width direction of the vehicle with respect to the position of the center of gravity g of each seat.

  FIG. 17 is a plan view showing a state in which each vehicle seat 10 of the vehicle seat group 100 rotates. When the two or more vehicle seats 10 are juxtaposed as described above and a predetermined or higher acceleration is applied to the vehicle M, the respective vehicle seats 10 rotate in the same direction around the respective rotation axes L1.

  According to the vehicle seat group 100 of the fourth embodiment described above, by making the rotation directions of two adjacent vehicle seats 10 coincide with each other, the legs of the occupants seated in the respective vehicle seats 10 are in contact with each other during rotation. It is possible to improve the safety of passengers.

  According to the vehicle seat, the seat control system, the vehicle seat control method, and the vehicle seat control program in the embodiment described above, when the vehicle M is subjected to an acceleration of a predetermined level or more, the vehicle seat is rotated to seat the occupant. It can be received by the backrest part of the vehicle and the burden on the passenger's body can be reduced.

  As mentioned above, although the form for implementing this invention was demonstrated using embodiment, this invention is not limited to such embodiment at all, In the range which does not deviate from the summary of this invention, various deformation | transformation and substitution Can be added. For example, although the case where the fixing member 15 is mechanically coupled is illustrated, the rotation restriction of the seating portion 11 may be electrically controlled using an actuator or the like. Moreover, each of the embodiments may be combined. In addition, various modifications can be used for the fixing member 15.

  FIG. 18 is a view showing a modified example of the fixing member 15. The fixing member 15M of Modification 1 includes a first fixing member 15Ma and a second fixing member 15Mb. The first fixing member 15Ma is formed in a shape that sandwiches the second fixing member 15Mb. In the first fixing member 15Ma, a plurality of tooth molds T are formed on the surface sandwiching the second fixing member 15Mb. The first fixing member 15Ma sandwiches the second fixing member 15Mb via a plurality of tooth molds T. Accordingly, the first fixing member 15Ma and the second fixing member 15Mb are maintained in connection with each other, and can be released when an acceleration of a predetermined level or more is applied.

  FIG. 19 is a view showing another modified example of the fixing member 15. The fixing member 15N of Modification 2 includes a first fixing member 15Na and a second fixing member 15Nb. The first fixing member 15Na has, for example, a tip that is pointed downward. The second fixing member 15Nb is formed or fixed to the floor surface F, for example, and is formed in a shape protruding upward into a shape that matches the tip of the first fixing member 15Na. Accordingly, the first fixing member 15Na and the second fixing member 15Nb are maintained in connection with each other, and can be released when an acceleration of a predetermined level or more is applied.

DESCRIPTION OF SYMBOLS 1 ... Seat control system, 10 ... Vehicle seat, 11 ... Seating part, 11a ... Seat surface, 12 ... Backrest part, 12a ... Backrest surface, 13 ... Headrest, 14 ... Rotary connection part, 14a ... 1st connection member, 14b ... Second connecting member, 14c ... drive unit, 14d ... one-way clutch, 15, 15M, 15N ... fixing member, 15a, 15Ma, 15Na, 15c ... first fixing member, 15b, 15Mb, 15Nb, 15d ... second fixing member, DESCRIPTION OF SYMBOLS 16 ... Lock mechanism, 16a ... Plunger, 16b ... Solenoid, 17 ... Lever, 18 ... 1st connection part, 20 ... Vehicle seat, 50 ... Collision determination part, 51 ... Camera, 52 ... Radar apparatus, 53 ... Finder, 54 ... Object recognizing device, 55 ... External world recognition unit, 100 ... Vehicle seat group, 160 ... Seat control unit

Claims (9)

A seating section that is rotatable in the yaw direction around a rotation axis that does not pass through the center of gravity of the seat;
A fixing portion that regulates rotation of the seating portion to fix the seating portion, and releases fixing of the seating portion in accordance with an acceleration acting on a vehicle.
Vehicle seat. The rotating shaft is spaced apart in the front-rear direction of the vehicle with respect to the position of the center of gravity of the seat;
The vehicle seat according to claim 1. The rotating shaft is spaced apart in the vehicle width direction of the vehicle with respect to the position of the center of gravity of the seat;
The vehicle seat according to claim 1. A drive unit that applies a rotational driving force around the rotation axis to the seating unit;
The vehicle seat according to claim 2 or 3. A prediction unit for predicting that acceleration is applied to the vehicle seat;
The driving unit applies a rotational driving force around the rotation axis to the seating unit when it is predicted that acceleration is applied by the prediction unit;
The vehicle seat according to claim 4. The driving unit is driven in one direction,
A one-way clutch that connects the seating portion and an output shaft of the drive portion, and selectively rotates the seating portion selectively in a direction in which the drive portion is driven;
The vehicle seat according to claim 5. A plurality of the vehicle seats according to any one of claims 2 to 6,
The separation direction in the vehicle width direction of the rotation shaft coincides with the separation direction in the vehicle width direction of the rotation shaft provided in the vehicle seat adjacent to the vehicle width direction.
Vehicle seat group. Computer
Get information around the vehicle,
Predicting that the vehicle is accelerated based on the surrounding information,
When it is expected that acceleration exceeding a predetermined value is applied to the vehicle, the lock mechanism is released,
Controlling the driving unit to give a rotational driving force around the rotating shaft to a seating portion that is rotatable in a substantially yaw direction around the rotating shaft that does not pass through the center of gravity of the seat;
Vehicle seat control method. On the computer,
Get information around the vehicle,
Predicting that the vehicle will be accelerated based on the surrounding information,
When it is expected that acceleration exceeding a predetermined value is applied to the vehicle, the lock mechanism is released,
Controlling the driving unit to give a rotational driving force around the rotating shaft to a seating portion that is rotatable in a substantially yaw direction around the rotating shaft that does not pass through the center of gravity of the seat;
program.

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