Patent ID: 7095200
Filing Date: 2006-08-22
Classification: E05F,E05Y,H02H

Abstract:
1. A power window apparatus with a pinch detecting function comprising: a motor that opens and closes a window through a window driving mechanism; a pulse generator that outputs pulse signals corresponding to a rotation of the motor; a switch device that outputs switch signals to manually open and close the window; and a control unit that generates control signals for controlling the motor according to the pulse signals and the switch signals, wherein, when the window is operated to be closed by the switch device, the control unit determines whether a pinching occurs in the window, and when it is determined that the pinching occurs in the window, the control unit performs a process required for avoiding the pinching, the control unit does not determine whether the pinching occurs in the window in a start cancellation period from the time when the motor is started to the time when the number of revolutions of the motor reaches a stable point, the control unit includes a backlash-detecting member that detects a backlash of a driving system having the window driving mechanism, and determines whether a backlash over a predetermined value exists in the driving system on the basis of input from the backlash-detecting member, when it is determined that the backlash over the predetermined value exists in the driving system, the control unit sets a termination time of the start cancellation period on the basis of the time when the peak of the number of revolutions of the motor is detected, and when it is determined that the backlash over the predetermined value does not exist in the driving system, the time when the rate of change of the number of revolutions of the motor reaches a predetermined value or the time when the rate of change of the motor input ratio reaches a predetermined value is set to the termination time of the start cancellation period.