| 摘要 |
PROBLEM TO BE SOLVED: To execute the better control of the malfunction of a disconnection sensing means comparing with the conventional ones in a false opening preventing device equipped with the disconnection sensing means which detects the disconnection of a wire. SOLUTION: The false opening preventing device 1 is equipped with the disconnection sensing means which is constituted to detect the disconnection of the wire 5 when a first slider 18 which has been moved to a first position by receiving the tensile force of the wire 5 is moved to a second position by receiving the reinforcing force of a reinforcing means. The reinforcing means is comprised of two magnets 31 and 32 and has a structure to reinforce the first slider 18 to be moved to the second position by making the magnet 31 be fixed to the first slider 18 and making the magnet 32 attract the magnet 31 with the magnetic force which acts between the magnet 31. COPYRIGHT: (C)2007,JPO&INPIT
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