Safety switch
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United States of America Patent
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Jun 23, 2015
Grant Date -
Jul 12, 2012
app pub date -
Jun 16, 2010
filing date -
Dec 2, 2008
priority date (Note) -
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status (Latency Note)
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Abstract
A safety switch is improved by the feature of staying in an open position in the event of breakage of a working rod or breakage or dropout of an operation portion and having a simple structure facilitating size reduction. Even if a rotary shaft is released from a supported state in an operation portion because an operating force of an operation or the number of operations of extracting an actuator from the operation portion exceeds a breakage tolerance, a working rod is permitted to move in an urging direction of a coil spring and is assuredly moved to the operation portion. Therefore, a switch can be assuredly set to an open position and, hence, the safety switch can achieve the safety improvement.
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