JP2005263076A - Occupant protection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To secure a space for moving a front seat backward in an occupant protection device moving the front seat backward in a frontal collision. <P>SOLUTION: A movable body 4 is disposed on a floor 4 between the front seat 2 and a rear seat 3, an actuator 9 for the movable body capable of moving the movable body to the rearward of a vehicle, and a collision prediction sensor 10 is provided on the front part of the vehicle. When the collision is predicted by the collision prediction sensor, the movable body is moved rearward to the vehicle. Since the movable body can be retracted rearward before the collision even if there is a rear passenger's foot or a baggage on the rear side of the front seat, they do not cause an obstruction in the case of the rear movement of the front seat. Since the space for movement is secured in the rear movement of the front seat in the collision, the occupant protection device can be not only suitably applied for a small sized vehicle but also for the pre-notification of the collision against the occupant when the occupant sits on the rear seat in common. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an occupant protection device that moves a seat to the rear of a vehicle when a frontal collision occurs.

  Conventionally, in order to prevent a disaster caused by a large forward jump due to the inertial force of the occupant at the time of a frontal collision, a collision detection sensor and a front seat seat rearward movement device have been provided. There is an occupant protection device that suppresses forward jumping of time (see, for example, Patent Document 1). By doing so, it is possible to cancel the increase in forward inertial force acting on the occupant during the collision and to make the deceleration of the vehicle body, the seat and the occupant almost equal to each other at an early stage. Can be realized.

JP 2000-62556 A (page 2-3, FIG. 1)

  The occupant protection device as described above is effective in suppressing the jumping out due to the inertial force of the occupant at the time of a collision. However, since the front seat is moved rearward as described above, for example, after the front seat It is necessary to secure a space on the seat side that enables the rearward movement. In the case of a vehicle that can take a long indoor length such as a large vehicle, it is easy to secure the space, but there is a problem that it is difficult to secure the space in a small vehicle or the like. In addition, when a luggage or the like is placed immediately behind the front seat, it may become an obstacle when the front seat moves backward.

  In the present invention, in order to solve such a problem and realize a space for rearward movement of the front seat in the occupant protection device that moves the front seat rearward at the time of a frontal collision, (1) A collision detection sensor (6) for detecting that a frontal collision has occurred, and a collision seat movement for moving the front seat (2) to the rear of the vehicle in accordance with a collision detection signal from the collision detection sensor (6) An occupant protection device having a device (7), disposed on a floor between the collision prediction sensor (10) for predicting the frontal collision and the front seat (2) and the rear seat (3). A movable movable body (8) provided and a movable body moving device (9) for moving the movable body (8) to the rear of the vehicle, and collision prediction by the collision prediction sensor (10) In response to the signal, the movable body moving device ( It said movable body (8) adapted to move to the rear of the vehicle by). In particular, the collision prediction signal from the collision prediction sensor (10) is input to the on-collision seat movement device (7), and the front seat (2) is moved to the rear of the vehicle when the collision prediction signal is input. And good.

  As described above, according to the present invention, when the collision is predicted by the collision prediction sensor at the time of the frontal collision of the vehicle, the movable body arranged on the floor between the front seat and the rear seat is moved to the rear of the vehicle. Therefore, since the movable body can be retracted before the collision, even when the front seat is moved rearward at the time of the collision, even if there are legs or luggage of the rear seat occupant behind the front seat There is no obstacle when the front seat is moved backward. As a result, it is possible to secure a moving space in the rearward movement of the front seat at the time of collision, so that not only can the occupant protection device be suitably applied to a small vehicle, but also an occupant is seated in the rear seat In some cases, it can also be used to notify the passenger of a collision in advance.

  In particular, if there is a time delay until the front seat is moved by the collision detection sensor by moving the movable body at the same time when the collision prediction signal is generated, Can be shortened.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual side view showing a vehicle body structure according to the present invention. As shown in the figure, a front seat 2 and a rear seat 3 are arranged in the vehicle interior of the vehicle 1, and the top of the rail 5 fixed on the upper surface of the floor 4 formed by the body frame. The front seat 2 is supported so as to be movable in the longitudinal direction of the vehicle.

  When the front seat 2 is structured so that the front and rear positions can be adjusted, the fixed side of the seat position adjusting rail is placed on the rail 5, and the fixed position rail for adjusting the seat position is mounted on the rail 5. Thus, it does not move at the acceleration / deceleration during normal running, but when a larger force is applied, the two may be frictionally engaged so that they can move. Alternatively, a share pin may be provided. The front seat 2 is preferably a seat belt integrated type in which a seat belt anchor and a seat belt retractor are integrally attached.

  A collision detection sensor (SSR) 6 is provided at an arbitrary position of the vehicle 1. The collision detection sensor 6 may detect an impact at the time of a frontal collision of the vehicle 1 by a change in deceleration, and includes, for example, a deceleration sensor. When a collision is detected by the collision detection sensor 6, the airbag is inflated.

  For example, a cylinder portion of a piston / cylinder type front seat actuator 7 as a seat moving device at the time of collision is fixed to the floor 4, and an end portion in a protruding direction of a piston rod 7 a of the front seat actuator 7 is a front seat. 2 is coupled to the bottom. When the front seat 2 has the above-described seat position adjusting mechanism, the piston rod 7a only needs to be coupled to the fixed side rail. The front seat actuator 7 operates to project the piston rod 7a toward the rear of the vehicle when the collision detection signal from the collision detection sensor 6 is input. It may be composed of a moving piston, a hydraulic cylinder, or a motor.

  A movable body 8 constituting the upper surface of the floor of the front seat 2 on the floor 4 (between the front seat 2 and the rear seat 3) is provided on the rear side of the vehicle. The movable body 8 is placed on the upper surface (or base body) at a corresponding portion of the floor 4, for example. The relationship between the movable body 8 and the floor 4 may be the same as described above, and the movable body 8 does not move with respect to the floor 4 at the acceleration / deceleration during normal running, but moves when a larger force is applied. For example, both of them are brought into a friction engagement state. The movable body 8 is also coupled with the projecting direction end of the piston rod 9a of the movable body actuator 9 which may be the same as the front seat actuator 7 as a movable body moving device provided at a corresponding position on the floor 4. Has been.

  A collision prediction sensor 10 is provided at an arbitrary position in the front portion of the vehicle. The collision prediction sensor 10 may be a distance sensor such as a laser type, a radar type, or an ultrasonic type, and emits a detection wave in front of the vehicle, detects a front obstacle by the reflected wave, and predicts a frontal collision. To do. Further, it may be based on image recognition using a camera. The collision prediction signal of the collision prediction sensor 10 is output to the movable body actuator 9. When the collision prediction signal is input to the movable body actuator 9, the piston rod is the same as the front seat actuator 7. 9a is pushed rearward of the vehicle, whereby the movable body 8 moves rearward of the vehicle.

  In the vehicle occupant protection device configured as described above, as shown in FIG. 2, when it is likely to collide with an obstacle ahead while traveling forward, the obstacle prediction sensor 10 first detects the obstacle. And the movable body actuator 9 is actuated by the collision prediction signal. As a result, the movable body 8 moves to the rear of the vehicle as indicated by the arrow A in the figure. For example, when the foot of the occupant sitting on the rear seat 3 is placed on the movable body 8, It can be moved backward. In addition, it is good to provide an opening and a plunging space on the rear seat 3 side so that the moving direction end of the movable body 8 can be plunged into the base of the rear seat 3.

  In the event of a collision thereafter, as shown in FIG. 3, this is detected by a collision detection sensor 6, and the front seat actuator 6 is actuated by the collision detection signal so that the front seat 2 is moved to the arrow B in the figure. Move to the rear of the vehicle as shown. At this time, since the movable body 8 under the rear seat has moved to the rear of the vehicle first, the front seat 2 that has moved rearward does not hit the foot of the rear seat occupant.

  The rear seat occupant also feels the rearward movement of the movable body 8 before the collision, so that the collision can be sensed in advance, and the attitude against the collision can be taken in advance. Can be prevented.

  Further, even when no occupant is on the rear seat 3, it is conceivable that the luggage 11 is placed on the floor behind the front seat 2 as shown in FIG. 4. In that case, the front seat 2 hits the luggage 11 when moving backward, and when the luggage 11 is heavy, the rear movement speed of the front seat 2 is reduced to obtain the original movement speed. There is also a possibility that it will not be possible. Even in such a case, since the movable body 8 is moved backward as described above, the same effects as described above can be obtained.

  For example, when the moving distance Lf of the front seat 2 is the same as the moving distance Lr of the movable body 8 or the movable body 8 is longer (Lf <Lr), the front seat 2 reaches the rearward movement arrival point. It is possible to prevent hitting the occupant's feet and the luggage 11 by the time. Thereby, the rearward movement operation of the front seat 2 at the time of the collision is not hindered, and the impact force of the front seat occupant at the time of the frontal collision can be sufficiently reduced.

  In the illustrated example, the movable body 8 is moved according to the collision prediction signal of the collision prediction sensor 10 and the front seat 2 is moved according to the collision detection signal of the collision detection sensor 6. It is not a thing. For example, as shown in FIG. 5, the collision prediction signal of the collision prediction sensor 6 is output to the movable body actuator 9 and simultaneously to the collision detection sensor 6. The collision detection sensor 6 is set so that the collision prediction signal is processed in the same manner as the original collision detection.

  As a result, when the collision prediction signal is generated, the movable body 8 can be moved and the front seat 2 can be moved at the same time, so that there is a time delay until the collision detection sensor 6 moves the front seat 2. In such a case, the time delay can be shortened. In addition, since the time to the collision can be known by using the vehicle speed and the distance to the obstacle as parameters at the timing of the occurrence of the collision prediction detection signal, the time delay data is combined with the above time delay data. It can be set optimally in the rearward movement process of the front seat.

1 is a conceptual side view showing a vehicle body structure according to the present invention. It is a figure corresponding to FIG. 1 which shows a collision prediction state. It is a figure corresponding to FIG. 1 which shows the state immediately after a collision. FIG. 4 is a view similar to FIG. 3 when a package is placed. It is a block diagram which shows another operation state based on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Front seat 3 Rear seat 6 Collision detection sensor 7 Front seat actuator (Seat movement device at the time of collision)
8 Movable body 9 Movable body actuator (movable body moving device)
10 Collision prediction sensor

Claims (2)

An occupant protection device having a collision detection sensor for detecting that a vehicle has collided to the front, and a collision seat moving device for moving a front seat to the rear of the vehicle in response to a collision detection signal from the collision detection sensor,
A collision prediction sensor for predicting the frontal collision, a movable movable body disposed on the floor between the front seat and the rear seat, and a movable for moving the movable body to the rear of the vehicle A body movement device,
The occupant protection device according to claim 1, wherein the movable body is moved rearward of the vehicle by the movable body moving device in response to a collision prediction signal from the collision prediction sensor.   2. The collision prediction signal from the collision prediction sensor is input to the on-collision seat movement device, and the front seat is moved rearward when the collision prediction signal is input. Crew protection device.

Images