| 摘要 |
PURPOSE:To prevent a hand, etc., from being caught in an opening and closing door (door) when the door is closed, by providing a contact detection piece to the abutting end part of the door and driving the door in an opening direction when the human body, etc., touches said end part. CONSTITUTION:On the way of the closing of a door, when a part of the human body, etc., touches a contacting detection piece provided to the abutting end part of the door, a signal of power source frequency by the induction of the human body or a pulse signal by the charging or discharging of the human body is supplied to terminals 12L' and 12R', amplified by amplifiers 53 and 54, and supplied to NOR circuits 37L and 37R. Consequently, high-potential signals of waveform shaping circuits 21L and 21R and low-potential signals of inverters 22L and 22R are supplied to FF circuits 38L and 38R through AND circuits 23L, 23R, 24L and 24R to hold outputs of the circuits 38L and 38R at low potentials, and the output of an AND circuit 39 is held at the low potential to turn off a transistor 40. Therefore, currents of coils 43L and 43R are cut off and switches 45 and 46 are changed over as shown in figure to drive motors 6L and 6R in door opening directions. |
