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US 9,318,280 B2Granted
Contactless switch
AssigneeContelec AG
InventorRolf Bachmann
Life of this patent
Estimating the term…
Abstract
A switch includes a button which is connected to a ring-shaped permanent magnet that is magnetized along a z-axis, a guide member made from an non-ferromagnetic material inside which the button and the ring-shaped permanent magnet are arranged so as to be moveable along the z-axis, as well as at least one sensor that has a sensitive area that is arranged inside the ring-shaped permanent magnet and that is configured to measure a change in a magnetic field in the radial direction within a x-y-plane, wherein the x-axis and the y-axis lie orthogonally to the z-axis, respectively.
Claims10
Switch, comprising
- a button which is connected to a ring-shaped permanent magnet that is magnetized along a z-axis,
- a guide member made from a non-ferromagnetic material inside which the button and the ring-shaped permanent magnet are arranged in such a manner as to be moveable along the z-axis,
- at least one sensor that has a sensitive area which is arranged inside the ring-shaped permanent magnet and that is configured to measure a change in a magnetic field in the radial direction of a x-y-plane, wherein the x-axis and the y-axis lie orthogonally to the z-axis, respectively, and
- a flux concentrator that is made from a ferromagnetic material and has an opening through which the button is guided along the z-axis,
- wherein the ring-shaped permanent magnet is surrounded by a ring-shaped shielding element made from a ferromagnetic material, and
- wherein the ring-shaped permanent magnet is connected to the ring-shaped shielding material.
3 more elements
Dependencies are inferred from the claim text.