Patent ID: 9528890
Filing Date: 2016-12-27
CPC Classification: G01L

Claim Text:
1. A pressing force sensor comprising: an expandable and contractible film; a pressing force detecting resistor membrane on a portion of a first surface of the expandable and contractible film; and a support adjacent the expandable and contractible film, the support having a recess adjacent the portion of the expandable and contractible film where the pressing force detecting resistor membrane is located, wherein the pressing force detecting resistor membrane includes a pair of opposing parts and a connecting part that connects the pair of opposing parts, the connecting part being located outside of the recess, and the expandable and contractible film is configured to be deformed and expanded into the recess when a pressing force is exerted on the first surface of the expandable and contractible film toward the recess such that a change in resistance value of the pressing force detecting resistor membrane caused by the pressing force is detected.