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US 6,975,194 B2Granted
Switching device
AssigneeOMRON Corporation
InventorsTakeshi Nishida, Yasuyuki Masui, Kozo Maenishi
Life of this patent
Estimating the term…
Abstract
A switching device which can be small-sized by improving a shielding performance and can improve the reliability of switching characteristics. A permanent magnet disposed near stationary contacts is arranged in its pole-face perpendicularly of the axis of a moving contact member.
Claims8
A switching device for making/breaking contact by bringing one end portion of a moving contact member into and out of contact with stationary contacts, comprising:
- a permanent magnet disposed near each of a pair of stationary contacts and having pole-faces arranged perpendicularly to an axis of said moving contact member,
- at least one stationary contact bed that forms a shielding wall extending along a surface of each permanent magnet to shield at least the pole face of each permanent magnet,
- wherein the shielding wall extends to at least a portion of at least one side face of each permanent magnet, and
- wherein the shielding wall is interposed between each permanent magnet and the moving contact member and one of the pair of stationary contacts, and
- at least one reentrant adjoined to the at least one side face of each permanent magnet formed by the at least one stationary contact bed.
2 more elements
Dependencies are inferred from the claim text.