| 摘要 |
<p>PURPOSE:To unlock a door without use of hands, by attaching a select switch provided with two or more rotary dials at a door lock device using a key and unlocking by rotating the dial with a sound-sensor switch. CONSTITUTION:A select switch 5 provided with at least two rotary dials 9, 10, 11 driven by a stepping motor is attached to the rear door 3 of a wagon card 2 and a sensor switch 6 having a noise cancel microphone switch 24 is attached as well. Even when both hands are not free due to baggages, a sensor switch 6 is actuated by sound to operate the select switch 5 and an unlocking mechanism 7 is driven to release a lever 26. In this way, the door can be easily unlocked with out use of hands.</p> |
