JP2006175901A - Occupant protection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an occupant protection device with higher occupant protection performance. <P>SOLUTION: When detecting a vehicle frontal collision in advance by a collision detecting sensor 2, a seat moving mechanism and a seat belt winding mechanism are interlocked and controlled to incline a seat 3 backward after winding a seat belt 5 and to extend a distance S1 between an occupant 7 and a steering wheel 24 as a collision object as compared with that in a normal state. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an occupant protection device that protects an occupant seated in a vehicle seat.

As a conventional occupant protection device, a device is known in which a seat is moved rearward in conjunction with the rearward movement of the engine to increase the occupant restraint force by the seat belt (for example, Patent Document 1).
JP 2003-262166 A

  In this type of occupant protection device, the occupant is restrained by a seat belt that spans the chest and waist of the occupant. When the front of the vehicle collides, the greater the amount of seat belt that is forwarded by the occupant, the greater the amount of collision energy absorbed. Will increase. However, it is necessary to prevent excessive pressure from acting on the occupant from the seat belt.

  On the other hand, the collision energy is absorbed by crushing the airbag deployed between the steering wheel and the occupant. To increase the amount of absorption, increase the airbag capacity and shorten the airbag deployment time. Therefore, it is necessary to maintain the internal pressure of the deployed airbag.

  However, with the conventional occupant protection device, it is difficult to satisfy all of these conditions, and further contrivance is required to improve the occupant protection performance.

  Accordingly, an object of the present invention is to obtain an occupant protection device having high occupant protection performance.

  In the occupant protection device according to the present invention, a collision detection sensor that detects a vehicle front collision in advance, a seat moving mechanism that moves the seat backward, and a seat belt winding that winds up a seat belt that restrains the occupant to the seat. And when the front collision of the vehicle is detected in advance from the detection result of the collision detection sensor, the seat movement mechanism and the seat belt retracting mechanism are interlocked to control the occupant to a predetermined posture. The most important feature is holding.

  According to the present invention, it is possible to hold the occupant in a more appropriate posture in advance by detecting the frontal collision of the vehicle in advance and controlling the seat movement mechanism and the seat belt winding mechanism in conjunction with each other. The protection performance of passengers can be increased.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  (First Embodiment) FIG. 1 is a perspective view showing a state in which an occupant is seated on a seat, FIG. 2 is a perspective view showing a seat moving mechanism of an occupant protection device according to this embodiment, and FIG. 3 is this embodiment. FIG. 4 is a side view showing the seating posture of the occupant in the normal state, and FIG. 5 is a state in which the seat is rotated backward by the seat moving mechanism. FIG. 6 is a diagram showing the correlation between the belt feed amount and the belt load in the occupant protection device, and FIG. 7 is a state in which the seat is rotated while being horizontally moved backward by the seat moving mechanism. It is a side view which shows the seating attitude | position in. In the figure, FR indicates the front, IN indicates the vehicle interior side in the vehicle width direction, and UP indicates the upper side.

  The occupant 7 is seated on a seat (seat) 3 including a seat cushion 3a, a seat back 3b, and a headrest 3c, and is restrained in a seated posture by the seat belt 5.

  The seat belt 5 is suspended by a belt anchor 6 at a position above the shoulder of the occupant 7, and a shoulder belt 5 a that spans from the shoulder to the waist and restrains the chest of the occupant 7, and on both sides of the waist And a lap belt 5b that is stretched over and restrains the waist of the occupant 7. When the seat belt retracting mechanism (not shown) is operated, the seat belt 5 is pulled downward from the belt anchor 6, thereby increasing the restraining force of the occupant 7 by the seat belt 5. In the present embodiment, the belt anchor 6 is attached to a vehicle body (for example, a center pillar).

  The seat moving mechanism 1 is for moving the seat 3 rearward (backward in the vehicle front-rear direction), and includes a pedestal 8, a link mechanism 16, and a spring 23 in the present embodiment.

  Among these, the pedestal 8 is rotatably supported by a support member 14 provided on the floor surface 13 via a shaft 12, and a pair of side frames 9 and side frames 9 that are parallel to each other. The rear frame 10 that connects the rear ends of the rear frame 10 and the shaft 15 that connects the front side of the side frame 9 in the front-rear direction center (at least the front side of the shaft 12) are provided. Seat attachment portions 11 are respectively provided at both front end portions of the side frame 9 and the rear frame 10, and the seat cushion 3a is attached to the seat attachment portion 11 with predetermined fastening members (for example, bolts and nuts). Etc.).

  A telescopic link mechanism 16 is provided between the pedestal 8 and the fixing member 21 attached on the floor surface 13. In the present embodiment, the link mechanism 16 includes an upper member 17 and a lower member 18, and a lower end portion of the upper member 17 and an upper end portion of the lower member 18 are mutually rotated via a fastening portion 19. It is concluded to be movable. And while the lower end part of the lower member 18 is fastened to the fixing member 21 via the fastening part 22, a through hole 20 is formed at the upper end of the upper member 17. A shaft 15 is inserted through the shaft 15.

  When the link mechanism 16 is in a contracted state (the state shown in FIG. 2), the link mechanism 16 is bent into a generally U-shape with the fastening portion 19 in the front, and the base 8 is substantially parallel to the floor surface 13 while being extended. Then, the upper member 17 and the lower member 18 are arranged in a substantially straight line, the shaft 15 supported by the upper end portion of the upper member 17 is raised, and the base 8 is inclined (backward inclined) with the front facing up. To do. The material of the pedestal 8 and the link mechanism 16 is not particularly limited as long as it can ensure rigidity, strength, durability, and the like, such as iron, aluminum, alloys thereof, and resins.

  Further, the spring 23 functions as an actuator that moves the base 8 and the seat 3 fixed to the base 8. In the present embodiment, the spring 23 extends in the front-rear direction between the mounting hole 16 a provided in the vicinity of the fastening portion 19 of the link mechanism 16 (the lower end portion of the upper member 17 in the present embodiment) and the shaft 12. It is constructed as a tension spring having hooks at both ends. By hooking the hook at the rear end of the spring 23 onto the shaft 12, a simpler configuration is realized without providing a portion for hooking the hook on the vehicle body or another member. In a normal state, the lock mechanism (not shown) extends the spring 23, the link mechanism 16 contracts, and the base 8 is locked in a state of being substantially parallel to the floor surface 13. When the lock is released, The urging force (tensile force) by the spring 23 acts, the link mechanism 16 extends, and the pedestal 8 tilts backward. The locking mechanism may be configured to include a locking member that locks a part of the base 8 or the link mechanism 16 and an electromagnetic solenoid that moves the locking member to release the locked state. it can.

  The sensor 2 that detects a front collision of the vehicle in advance is provided at the front of the vehicle such as a front grille, for example, and detects a front obstacle by radar or infrared rays.

  Next, with reference to FIGS. 4-6, operation | movement of the passenger | crew protection apparatus of the said structure is demonstrated.

  First, in the normal state shown in FIG. 4, the separation distance in the front-rear direction between the occupant 7 and the collision object (handle 24) is S0.

  Here, based on the detection result of the sensor 2, if it is determined by the control means (for example, ECU or the like; not shown) that a vehicle front collision is unavoidable, the control means first starts the seat belt. The winding mechanism is operated to wind up the seat belt 5 and restrain the occupant 7 to the seat 3. At this time, a tension (belt load) T acts on the seat belt 5.

  Next, after a predetermined time elapses, the control means releases the lock by the lock mechanism, contracts the spring 23, extends the link mechanism 16, and rotates the base 8 and the seat 3 backward (FIG. 5). At this time, the separation distance in the front-rear direction between the occupant and the collision target is S1, which is larger than S0.

  That is, according to the occupant protection device according to the present embodiment, when a front collision of the vehicle is detected in advance, first, the seat belt retracting mechanism operates to restrain the occupant 7 to the seat 3, and then The seat moving mechanism 1 operates and the seat 3 on which the occupant 7 is seated rotates backward.

  In this manner, by operating the seat belt retracting mechanism before the collision occurs, as shown in FIG. 6, as shown in FIG. 6, the unwinding of the seat belt 5 is started with the forward movement of the occupant 7 at the time of the vehicle front collision. At this time, the tension T0 can be applied to the seat belt 5 in advance. Therefore, compared to a case where the seat belt 5 is not wound in advance (conventional method), the belt load rises faster, and the amount of energy absorption proportional to the area of the graph of FIG. 6 can be increased.

  In addition, the seat belt retracting mechanism is operated before the seat 3 is moved backward by the seat moving mechanism 1 to increase the restraint force of the occupant 7 on the seat 3, so that the occupant 7 can be moved more by the backward movement of the seat 3. It can be reliably moved backward. That is, if the seat 3 is moved backward without restraining the occupant 7, it is difficult to move the occupant 7 backward due to inertial force acting on the occupant 7. Note that if the seat belt 5 is wound during the forward movement of the occupant 7 due to a collision, excessive pressure may be applied from the seat belt 5 to the occupant 7, but in the present embodiment, before the forward movement of the occupant 7 is started. In addition, since the seat belt 5 winding operation can be completed, such a situation can be more reliably suppressed.

  Further, as shown in FIG. 6, the rearward movement of the seat 3 causes the front-rear separation distance S1 between the occupant 7 and the object to be collided at the start of the collision to be larger than the conventional separation distance (S0). The belt feed amount accompanying the forward movement of the occupant 7 at the time can be increased (increment: X). Therefore, the amount of energy absorption proportional to the area of the graph of FIG. 6 can be increased by increasing the belt feeding amount.

  At this time, as shown in FIG. 7, if the seat 3 is rotated while being horizontally moved rearward, the distance between the occupant 7 and the object to be collided in the front-rear direction is further increased (S 2), and the seat belt 5. Since the amount of feed can be further increased, the amount of energy absorption can be further increased. In order to realize such an operation, for example, the support member 14 of the seat moving mechanism 1 is guided and supported by a rail 44 provided on the floor surface 13 so as to be movable in the front-rear direction, and the rear end of the spring 23 is supported by the shaft 12. It can be fixed to the car body side.

  When the seat 3 is moved rearward, it is preferable to perform brake control. Specifically, the vehicle is braked even after the occupant 7 moves rearward by locking the brake pedal at the depression amount immediately before the start of the movement of the seat 3 (starting point) or automatically performing the brake control. It is preferable to perform the control.

  According to the above-described embodiment, the frontal collision of the vehicle is detected in advance and the seat moving mechanism and the seat belt retracting mechanism are interlocked to control the front of the occupant 7 before the frontal collision of the vehicle occurs. Since the position and the tension of the seat belt 5 can be kept in a more appropriate state, the impact on the occupant 7 can be reduced, and the protection performance of the occupant 7 can be enhanced.

  Further, according to the present embodiment, since the seat belt retracting mechanism is operated before the seat moving mechanism 1 is operated, the seat 3 is moved backward while the occupant 7 is securely restrained by the seat 3. The occupant 7 can be moved rearward more reliably. Further, since the seat belt 5 winding operation can be completed before the occupant 7 starts to move forward due to a frontal collision, the timing of the occupant 7 moving forward and the winding of the seat belt 5 overlap. A situation in which excessive pressure is applied from the seat belt 5 to the occupant 7 can be avoided more reliably.

  Further, according to the present embodiment, since the seat 3 is rotated rearward, the distance between the occupant 7 and the object to be collided before the collision is further increased, the belt feed amount is increased, and the amount of collision energy absorbed is increased. Can be increased. Further, by rotating the seat 3 rearward, a wider foot space for the occupant seated on the rear seat of the seat 3 can be secured.

  Further, if the seat 3 is horizontally moved backward and rotated backward, the distance between the occupant 7 and the object to be collided before the collision is further increased, the belt feed amount is further increased, and the collision energy is increased. The amount of absorption can be further increased. Further, as compared with the case where the seat 3 is only moved in parallel, a wider foot space for the occupant seated on the rear seat of the seat 3 can be secured.

  In addition, according to the present embodiment, since the spring 23 is used as the actuator of the seat moving mechanism, the seat moving mechanism 1 can be realized relatively easily, and more quickly using the biasing force of the spring 23. Thus, the seat 3 can be moved backward. There is also an advantage that the original state can be easily restored.

  (Second Embodiment) FIG. 8 is a side view showing a seating posture of an occupant in a normal state in this embodiment, and FIG. 9 is a side view showing a seating posture in a state where a seat is rotated backward by a seat moving mechanism. FIG. 10 and FIG. 10 are side views showing a seating posture in a state where the seat is rotated while being horizontally moved backward by the seat moving mechanism. Note that the occupant protection device according to the present embodiment has the same components as those of the first embodiment. Therefore, the same components are given the same reference numerals, and redundant description is omitted.

  In the second embodiment, the belt anchor 6 is provided on the vehicle body. In the present embodiment, the belt anchor 6A is provided on the seat 3 and configured as a belt-in seat. Also in the present embodiment, as in the first embodiment, before the collision occurs, the distance between the occupant 7 and the object to be collided (handle 24) is set to S1 (the seat 3 is rotated backward) which is larger than S0 in the normal state. In the case of FIG. 9) or S <b> 2 (when the seat 3 is rotated while being horizontally moved rearward; FIG. 10), the amount of collision energy absorbed can be increased.

  Furthermore, according to this embodiment, since the belt anchor 6A is provided on the seat 3, when the seat 3 is moved backward, the seat belt 5 is not loosened due to the relative displacement between the seat 3 and the belt anchor. There is an advantage that the occupant 7 can be reliably restrained by the seat 3. In the configuration of the present embodiment, since the pressure applied from the seat belt 5 to the occupant 7 is different from that in the first embodiment, it is preferable to appropriately set the winding amount and the winding speed according to the device configuration. It is.

  (Third Embodiment) FIG. 11 is a perspective view showing a seat moving mechanism of an occupant protection device according to this embodiment. The occupant protection device according to the present embodiment also has the same components as those in the first embodiment. Therefore, the same components are given the same reference numerals, and redundant description is omitted.

  The seat moving mechanism 1 according to the first embodiment uses a spring 23 as an actuator, whereas the seat moving mechanism 1B according to the present embodiment uses a motor 26 as an actuator.

  That is, in the seat moving mechanism 1B according to the present embodiment, a front frame 8a is provided at the front portion of the pedestal 8B and is erected between the front ends of the side frames 9, and an arc shape is formed on the lower surface of the front frame 8a. An arm 28 provided with a long hole 29 is attached, a rack 30 is formed on the inner wall surface of the long hole 29, and a pinion 27 that meshes with the rack 30 is attached to the floor 13 using a bracket 25. It is comprised so that it may rotate.

  Therefore, by controlling the rotation of the motor 26, the arm 28 and the front frame 8a can be raised and the pedestal 8B can be tilted backward. That is, since the seat 3 can be moved backward also by the seat moving mechanism 1B, the same effect as that of the first embodiment can be obtained also by the present embodiment. Further, according to the present embodiment, since the motor 26 is used, the rearward movement speed of the seat 3 is changed according to the size of the occupant 7, the position of the seat 3, and the rearward movement amount is variably set. , More precise and more appropriate control becomes possible. There is also an advantage that the original state can be restored easily and more quickly. In the present embodiment, the base 8B may be assisted by a spring force or the like in order to ensure the initial moving speed of the base 8B.

  (Fourth Embodiment) FIGS. 12A and 12B are side views showing a seat moving mechanism of an occupant protection device according to this embodiment, wherein FIG. 12A is a diagram showing a state before operation (normal state), and FIG. FIG. The occupant protection device according to the present embodiment also has the same components as those in the first embodiment. Therefore, the same components are given the same reference numerals, and redundant description is omitted.

  The seat moving mechanism 1 of the first embodiment uses a spring 23 as an actuator, whereas the seat moving mechanism 1C according to the present embodiment uses an airbag 31 as an actuator.

  That is, in the seat moving mechanism 1 </ b> C according to the present embodiment, the airbag 31 is provided at a position between the base 8 and the floor surface 13 in front of the shaft 12. In addition, an inflator 32 that generates gas filling the airbag 31 is provided in the space between the base 8 and the floor surface 13, and the airbag 31 is outward (forward) at the front end of the base 8. A shield 33 that suppresses the protrusion is provided. The airbag 31 is not provided with a vent hole, and once inflated, the airbag 31 is maintained in an inflated state.

  Therefore, when the collision is unavoidable, the airbag 31 can be inflated, and the pedestal 8 can be tilted backward as shown in FIG. In this case, the shield 33 is stretched between the front end of the base 8 and the floor surface 13, and the airbag 31 is prevented from protruding outside the shield 33. That is, since the seat 3 can be moved rearward also by the seat moving mechanism 1C, the same effect as that of the first embodiment can be obtained also by the present embodiment. Further, according to the present embodiment, the use of the airbag 31 has an advantage that the seat moving mechanism 1C can be formed in a smaller size and the seat 3 can be moved rearward more quickly. Note that the seat attachment portion 11 may be attached to the base 8 so as to be movable, and the seat 3 may be moved further rearward.

  (Fifth Embodiment) FIG. 13 is a side view showing a seat moving mechanism of an occupant protection device according to the present embodiment, where (a) is a diagram showing a state before operation (normal state), and (b) is an operation. FIG. The occupant protection device according to the present embodiment also has the same components as those in the first embodiment. Therefore, the same components are given the same reference numerals, and redundant description is omitted.

  The seat moving mechanism 1D according to the present embodiment is provided with a long hole 34 in a portion that is rotatably supported by the shaft 12 of the side frame 9D, so that the pedestal 8D can be tilted backward, while being rearward with respect to the support member 14. It can be moved to. As the actuator, a spring, an airbag, or the like can be used as in the above embodiments. In this embodiment, the actuator pushes the pedestal 8D against the floor surface 13 diagonally upward and backward. It is preferable to provide an actuator that pushes backward together with an actuator that pushes the pedestal 8D upward as in the above embodiments. The rear lower side of the pedestal 8D is cut obliquely, and this portion abuts against the floor surface 13 so that the posture in which the pedestal 8D is inclined is stably maintained.

  The seat moving mechanism 1D can also move the seat 3 backward, so that the present embodiment can provide the same effects as those of the first embodiment. And according to this embodiment, there is an advantage that the mechanism for horizontally moving the seat 3 while rotating backward can be realized relatively easily without providing a separate rail or slider.

  (Sixth Embodiment) FIG. 14 is a side view showing a normal state of a seat in this embodiment, and FIG. 15 is a side view showing a state in which the seat is moved rearward in this embodiment. The occupant protection device according to the present embodiment also has the same components as those in the first embodiment. Therefore, the same components are given the same reference numerals, and redundant description is omitted.

  In the present embodiment, a mechanism (headrest moving mechanism) 35 that tilts the headrest 3c forward is provided by using the backward movement of the seat 3E. Specifically, a bracket 37 that is rotatable about a fulcrum 36 is provided on the seat back 3b (the frame member), and the support arm 39 of the headrest 3c is supported by the bracket 37. On the other hand, the wire 41 is bridged from the fastening point 42 provided at the front end portion of the seat cushion 3 a to the fastening point 40 provided at the front end portion of the bracket 37 via the hanging point 43 on the floor surface 13 and the shaft 12. When the front end of the seat cushion 3a rises with the rearward tilt of the seat 3 and is separated from the floor surface 13, the fastening point 40 of the bracket 37 is pulled downward, the bracket 37 rotates around the fulcrum 36, and the headrest 3c moves forward. That is, in the present embodiment, the distance between the fastening point 42 and the hanging point 43 is increased from L0 (FIG. 14) to L1 (FIG. 15) by the rearward movement of the seat 3 (backward tilt in the case of the present embodiment). Only (D = L1-L0), the fastening point 40 is moved downward, and the headrest 3c is moved forward.

  When the seat 3 is moved rearward by the seat moving mechanism, the seat 3 moves rearward and stops at a predetermined position. At this time, the neck portion is caused by inertial force acting on the head of the occupant 7. May be burdensome. In this regard, according to the present embodiment, the headrest moving mechanism 35 is operated in parallel with the seat moving mechanism, and the headrest 3c is moved forward (inclined forward in this example) before the seat 3 reaches the retracted position. Therefore, the burden on the neck can be reduced accordingly. Moreover, in this embodiment, since the headrest 3c is moved using the movement of the seat 3 by the seat moving mechanism, the configuration may be relatively simple compared to a case where a mechanism for tilting the headrest 3c forward is provided separately. it can. 14 and 15, the seat moving mechanism is not shown, but in the present embodiment, various seat moving mechanisms including those shown in the above embodiments can be used. Further, in the case of using a seat moving mechanism that horizontally moves the seat 3E rearward, the hanging point 43 and the shaft 12 may be configured to move horizontally with the seat 3E.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiments, and various modifications can be made. For example, it is needless to say that any combination of the above embodiments can be implemented. Further, a compression spring may be used as the actuator spring, and the front portion of the pedestal may be lifted by the extension force, or the pedestal may be tilted backward using a torsion spring. In addition, as the actuator for the seat moving mechanism, an actuator that is difficult to restore to the state before the operation, such as a gunpowder cartridge, may be used. In addition, a headrest moving mechanism including a motor, a spring, or the like as an actuator may be separately configured, and for example, the headrest moving mechanism may be operated with the activation of the seat moving mechanism as a trigger.

The perspective view which shows the state in which the passenger | crew sat down on the seat. The perspective view which shows the seat moving mechanism of the passenger | crew protection apparatus concerning 1st Embodiment of this invention. The figure which shows the attachment state of the collision detection sensor of the passenger | crew protection apparatus concerning 1st Embodiment of this invention. The side view which shows the passenger | crew's sitting posture in a normal state in 1st Embodiment of this invention. The side view which shows the seating attitude | position in the state which rotated the seat back by the seat moving mechanism concerning 1st Embodiment of this invention. The figure which shows the correlation of the belt feeding amount and belt load in the passenger | crew protection device concerning 1st Embodiment of this invention. The side view which shows the seating attitude | position in the state rotated by making the seat moving mechanism concerning 1st Embodiment of this invention horizontally move a seat back. The side view which shows the passenger | crew's sitting posture in the normal state in 2nd Embodiment of this invention. The side view which shows the seating attitude | position in the state which rotated the seat back by the seat moving mechanism concerning 2nd Embodiment of this invention. The side view which shows the seating attitude | position in the state rotated by making the seat moving mechanism concerning 2nd Embodiment of this invention rotate a seat back horizontally. The perspective view which shows the seat moving mechanism of the passenger | crew protection apparatus concerning 3rd Embodiment of this invention. It is a side view which shows the seat movement mechanism of the passenger | crew protection apparatus concerning 4th Embodiment of this invention, Comprising: (a) is a figure which shows before operation | movement (normal state), (b) is a figure which shows after operation | movement. It is a side view which shows the seat moving mechanism of the passenger | crew protection apparatus concerning 5th Embodiment of this invention, Comprising: (a) is a figure which shows before operation | movement (normal state), (b) is a figure which shows after operation | movement. The side view which shows the normal state of a sheet | seat in 6th Embodiment of this invention. The side view which shows the state which the sheet | seat moved back in 6th Embodiment of this invention.

Explanation of symbols

1, 1B, 1C, 1D Seat movement mechanism 2 Sensor (collision detection sensor)
3,3E seat
3c Headrest 5 Seatbelt 7 Crew 23 Spring 26 Motor 31 Airbag 35 Headrest moving mechanism

Claims (10)

A collision detection sensor for detecting a front collision of the vehicle in advance;
A seat moving mechanism for moving the seat backward;
A seat belt retracting mechanism that winds up a seat belt that restrains an occupant to the seat;
With
When a vehicle front collision is detected in advance from the detection result of the collision detection sensor, the seat movement mechanism and the seat belt retracting mechanism are interlocked and controlled to hold an occupant in a predetermined posture. Crew protection device.   The occupant protection device according to claim 1, wherein the seat belt retracting mechanism is operated before the seat moving mechanism is operated.   The occupant protection device according to claim 1, wherein the seat moving mechanism rotates the seat backward.   The occupant protection device according to claim 1, wherein the seat moving mechanism horizontally moves the seat rearward and rotates the seat rearward.   The occupant protection device according to any one of claims 1 to 4, wherein a spring is used as an actuator of the seat movement mechanism.   The occupant protection device according to any one of claims 1 to 4, wherein a motor is used as an actuator of the seat movement mechanism.   The occupant protection device according to any one of claims 1 to 4, wherein an airbag is used as an actuator of the seat movement mechanism.   The occupant protection device according to any one of claims 1 to 7, further comprising a headrest moving mechanism that moves a headrest of the seat in parallel with movement of the seat by the seat moving mechanism.   The occupant protection device according to claim 8, wherein the movement of the headrest by the headrest movement mechanism is linked to the movement of the seat by the seat movement mechanism. When a front collision of the vehicle is detected in advance from the detection result of the collision detection sensor, control of moving the seat by the seat moving mechanism that moves the seat backward and control of the seat belt winding mechanism that restrains the occupant to the seat are performed. An occupant protection method characterized by holding the occupant in a predetermined posture in conjunction with each other.

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