| 摘要 |
PROBLEM TO BE SOLVED: To provide a crescent lock which can not be easily unlocked even when a glass is broken. SOLUTION: A rotary plate 11 to be turned together with a rotary shaft of a lever is provided in a fitting cover body of the lever 10 provided with an eccentric cam, a recessed notch is cut in a circumferential surface of the rotary plate 11, a slide plate to be engaged with this notch and prevent the turn is provided in a vertically slidable manner, a magnet 18 to operate a reed switch 29 is mounted on the position symmetrical to the notch in the rotary plate 11, and a magnet 21 which is attracted to the magnet mounted on an end of a shaft to be slidably moved by the start of a solenoid 25 or a motor and to slidably move the slide plate is mounted on the surface of the slide plate, and a starting cover for the secondary lock to store the reed switch, a photoelectric device light receiving part, etc., in corresponding parts of a longitudinal stile when this magnet is mounted on the longitudinal stile of an inner window is provided to prevent the contact with a secondary lock mechanism.
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