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US 12,609,259 B2Granted
Safety switch having a lock function using an electromagnet
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
A safety switch comprising:
- a detection unit that detects that a movable actuator is within a predetermined range, the movable actuator includes a member to be magnetized on which a surface to be attracted is formed;
- a safety signal output unit that outputs a safety signal based on a detection result indicating whether the movable actuator is within the predetermined range, obtained by the detection unit;
- an electromagnet on which an attraction surface corresponding to the surface to be attracted is formed;
- a lock input unit that receives a lock instruction for locking movement of the movable actuator;
- a drive control unit that drives the electromagnet to cause the attraction surface of the electromagnet and the surface to be attracted of the movable actuator to be attracted to each other 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, wherein
- the attachment portion is formed on a magnetic body of the electromagnet, and
- the magnetic body comprises a yoke portion of the electromagnet.
6 more elements
A safety switch comprising:
- a detection unit that detects that a movable actuator is within a predetermined range, the movable actuator includes a member to be magnetized on which a surface to be attracted is formed;
- a safety signal output unit that outputs a safety signal based on a detection result indicating whether the movable actuator is within the predetermined range, obtained by the detection unit;
- an electromagnet on which an attraction surface corresponding to the surface to be attracted is formed;
- a lock input unit that receives a lock instruction for locking movement of the movable actuator;
- a drive control unit that drives the electromagnet to cause the attraction surface of the electromagnet and the surface to be attracted of the movable actuator to be attracted to each other 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,
- wherein the electromagnet has an outer peripheral surface formed to surround a central axis intersecting a center of the attraction surface, and an end of the attachment portion is provided on the outer peripheral surface.
5 more elements
A safety switch comprising:
- a detection unit that detects that a movable actuator is within a predetermined range, the movable actuator includes a member to be magnetized on which a surface to be attracted is formed;
- a safety signal output unit that outputs a safety signal based on a detection result indicating whether the movable actuator is within the predetermined range, obtained by the detection unit;
- an electromagnet on which an attraction surface corresponding to the surface to be attracted is formed;
- a lock input unit that receives a lock instruction for locking movement of the movable actuator;
- a drive control unit that drives the electromagnet to cause the attraction surface of the electromagnet and the surface to be attracted of the movable actuator to be attracted to each other based on the lock instruction received via the lock input unit;
- an attachment portion which is formed on the electromagnet and fixes a switch body to an installation place of the switch body;
- and
- a resin housing that accommodates the detection unit, the output unit, and the drive control unit, wherein
- the electromagnet is connected to the resin housing, and
- the attraction surface and the attachment portion formed on the electromagnet are exposed.
7 more elements
Dependencies are inferred from the claim text.