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Title:
SAFETY SWITCH
Document Type and Number:
Japanese Patent JP2007323985
Kind Code:
A
Abstract:

To provide a safety switch capable of preventing error operation due to breakage of a cam member or the like by an operation exceeding a prescribed amount of an insertion object into an operating part of a switch main body.

When an actuator 3 is forcibly pulled out from a safety switch in which rotation of a driving cam 151 is locked, breakage of the driving cam 151 is prevented by breakage of a connecting member 161b, and a circumferential face in which an auxiliary cam curvature part 111a of an auxiliary cam 161 continues to a large diameter portion of a driving cam curvature part 151c is formed. Then, after the actuator 3 is pulled out and inserted again, an operating rod 21 sliding contacts the circumferential face formed, thereby movement of the operating rod 21 is blocked. Accordingly, by insertion of the actuator 3, opening and closing state of a switch of the safety switch is prevented to be switched over, and error operation of the safety switch can be prevented.

COPYRIGHT: (C)2008,JPO&INPIT


Inventors:
KOMORI ETSURO
FUKUI TAKAO
OHATA TETSUSHI
HIDAKA TAKASHI
Application Number:
JP2006153460A
Publication Date:
December 13, 2007
Filing Date:
June 01, 2006
Export Citation:
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Assignee:
IDEC CORP
International Classes:
H01H27/00; H01H3/20
Domestic Patent References:
JP2003331696A
JP2004079190A
JP2003045294A
Attorney, Agent or Firm:
梁瀬 右司
振角 正一