Back to results
US 11,190,184 B2Granted
Force sensor, particularly for a touch pad
AssigneeThe Swatch Group Research and Development Ltd
InventorFrancois Gueissaz
Life of this patent
Estimating the term…
Abstract
A force sensor including: a first part including a detection coil; a second part positioned opposite the first part and including: a ferromagnetic plate translationally movable relative to the first part to move towards the first part when a force is transferred to the sensor and to reduce reluctance of a magnetic circuit formed by the first and second parts in series with a variable gap; and an electronic detection circuit configured to generate a signal dependent on the reluctance of the magnetic circuit. The ferromagnetic plate is formed by an amorphous metal alloy.
Claims12
A force sensor comprising:
- a first part comprising a detection coil;
- a second part positioned opposite the first part and comprising:
- a ferromagnetic plate that is translationally movable relative to the first part to move towards the first part when a force is transferred to the force sensor and to reduce reluctance of a magnetic circuit formed by the first and second parts in series with a variable gap;
- an electronic detection circuit configured to generate a signal dependent on the reluctance of the magnetic circuit;
- wherein the ferromagnetic plate is formed by an amorphous metal alloy.
2 more elements
Dependencies are inferred from the claim text.