Preh Gmbh

Sara Hofmann

Thilo Schultheis

Benedikt Schmidt

Jochen Schlereth

Jürgen Nauth

Harald Ment

Matthias Müller

Thomas Zirkelbach

Juergen Nauth

The present disclosure relates to a capacitive force sensor. The capacitive force sensor includes a planar base body, a supported membrane body, two spacers disposed spaced apart to each other, where the membrane body abuts the planar base body via the spacers, and wherein a cavity is formed between the membrane body and the planar base body to allow displacement or deflection of the membrane body under a force onto the membrane body in the area between the spacers. The membrane body forms a first electrode and, a second electrode is provided on the planar base body, wherein the first and second electrode define a first precision capacitor with changing measuring capacity depending on the force. An electrical bracket extends from each of the spacers for electrically contacting the first electrode and forms a bend between each of the associated spacer and a bottom of the base body.

Capacitive force sensor having improved attachment

An input device includes a first component with an actuating layer and a first electrode arranged adjacent thereto, a second component with a carrier and a second electrode, and a device which electrically contacts the first and second electrodes. The first and second electrodes face each other with an air gap therebetween. The first electrode, under an influence of an actuating force acting on the actuating surface undergoes, upon an actuation, a displacement so as to move the first electrode closer to the second electrode against an elastic restoring force. A detection and evaluation device applies a measuring capacitance to the first and second electrodes and detects a change in the measuring capacitance dependent on the displacement moving the first and second electrodes closer to each other in order to associate the actuation with a switching or controlling function after detecting a predetermined change in the measuring capacitance.

Input device with a two-part force sensor for actuation inputs and method for the production thereof

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Wülfershausen, Germany

Sara Hofmann