US 12,243,705 B2
Safety switch
Choryon Oh, Osaka (JP); Yu Babasaki, Osaka (JP); and Lye Tatt Cheah, Osaka (JP)
Assigned to KEYENCE CORPORATION, Osaka (JP)
Filed by Keyence Corporation, Osaka (JP)
Filed on Jan. 9, 2024, as Appl. No. 18/407,521.
Application 18/407,521 is a continuation of application No. 18/078,257, filed on Dec. 9, 2022, granted, now 11,908,654.
Application 18/078,257 is a continuation of application No. 16/270,613, filed on Feb. 8, 2019, granted, now 11,551,884.
Claims priority of application No. 2018-077633 (JP), filed on Apr. 13, 2018.
Prior Publication US 2024/0145187 A1, May 2, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H01H 9/28 (2006.01); F16P 3/08 (2006.01); H01H 9/22 (2006.01); H01H 27/00 (2006.01)
CPC H01H 9/285 (2013.01) [F16P 3/08 (2013.01); H01H 9/22 (2013.01); H01H 2027/005 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A safety switch comprising:
a head having a receiving space for receiving a bolt of an actuator;
a first attachment portion disposed in the head and having a first attachment hole so that a first attachment member is inserted through the first attachment hole to an external object;
a wireless detector configured to detect a first state in which the bolt is received in the receiving space by detecting a wireless tag disposed on the actuator;
a switching device configured to output a signal indicating a safety state based on the first state detected by the detector;
a lock pin configured to lock the bolt by regulating pull-out of the bolt in the first state;
a lock driver configured to drive the lock pin to switch, based on an input signal, between a lock state in which the pull-out of the bolt in the first state is regulated and an unlock state in which the pull-out of the bolt in the first state is permitted; and
a casing having an end wall at one end through which the lock pin is inserted when the bolt is locked, and coupled to the head at the end,
wherein the casing houses the wireless detector, the switching device, and the lock driver, and the casing has a resin side wall facing the wireless detector,
wherein the first attachment hole is provided at a center position in a transverse direction of the safety switch.