| 摘要 |
PROBLEM TO BE SOLVED: To obtain a car-body accelerometer in which the direction of a sensor case can be adjusted precisely, whose mechanism is simple and whose production costs can be reduced. SOLUTION: A retractor 100 for a seat belt which constitutes a seat belt device provided with a sensor 32 is attached to the seat back 62 of a reclining seat 61 which is attached to a vehicle or the like. Then, a sensor arm which is turnably attached to a sensor case is installed so as to be situated, in a first position in which a lock means used to lock the rotation to the webbing pulling-out direction of a winding shaft is operated, and in a second position in which the lock means is not operated. An inertial body which is moved relatively on the sensor case and which moves the sensor arm to the first position is installed. A transmission means 90 which moves the sensor case so as to be interlocked according to the angle of inclination of the seat back 62, in such a way that the direction of the sensor case is kept properly irrespective of the inclination state of the seat back 62, is installed. The lock means is operated by the movement operation of the inertial body when a prescribed car-body acceleration acts. |
