Safety switch
AssigneeKeyence Corporation
InventorHiroshi KASHIMA
Life of this patent
Estimating the term…
Abstract
A safety switch that has a lock function using an electromagnet and a member to be magnetized is downsized. The safety switch includes: a detection unit that detects that a movable actuator is within a predetermined range; a safety signal output unit that outputs a safety signal based on a detection result obtained by the detection unit; an electromagnet; a lock input unit that receives a lock instruction for locking movement of the actuator; a drive control unit that drives the electromagnet based on the lock instruction received via the lock input unit; and an attachment portion which is formed on the electromagnet and fixes a switch body to an installation place of the switch body.
Claims15
1-12. (canceled)
A safety switch comprising:
- an actuator including a member to be magnetized on which a surface to be attracted is formed;
- and
- a switch body including an attraction surface corresponding to the surface to be attracted, the safety switch outputting a safety signal based on whether or not the actuator is within a predetermined range with respect to the switch body,
- wherein the safety switch includes:
- an electromagnet that has a magnetic body and is formed such that the attraction surface is exposed outward;
- a detection unit that detects that the actuator is within the predetermined range with respect to the switch body;
- a control circuit that controls, based on a lock instruction for locking movement of the actuator,
- the driving of the electromagnet to cause the attraction surface of the electromagnet and the surface to be attracted of the actuator to be attracted to each other;
- a housing that accommodates the detection unit and the control circuit;
- and
- an attachment portion that is formed on the magnetic body of the electromagnet and is for fixing the switch body to an installation place of the switch body.
Dependencies are inferred from the claim text.