| 摘要 |
PROBLEM TO BE SOLVED: To surely detect a nipping and quickly avoid the nipping by reversing a window glass on open side only when the reducing quantity of rotating speed of a motor is within a preset range. SOLUTION: The rotation of a motor 6 is detected by a rotation detecting sensor 7 through an armature shaft 6c, and transmitted to a rotating speed detecting means 12. In the rotating speed detecting means 12, count operation is performed to provide the latest speed data. A nipping detecting means 15 transmits a reversion command signal for driving a window glass 60 to open side to a drive circuit 11 only when the reducing quantity of the speed data is within a prescribed range based on the set values of first and second comparative value setting means 13, 14. Therefore, the wrong reversing operation based on the sudden closing operation of a door or the closing operation during bad road traveling is prevented, and a nipping can be surely detected and quickly avoided. |
