Integrated optical encoder

US7345273B2 · kind B2 · utility

Assignee

• Preh GmbH · DE

Inventors

• Anton Rüttiger · Wildflecken, DE
• Markus Peschel · Münnerstadt, DE
• Thomas Ofenhitzer · Freiensteinau, DE

Key dates

• Filing date: Mar 13, 2006
• Grant date: Mar 18, 2008
• Expiry date: Mar 13, 2026

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/301
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A rotary switch including a control element, a light-emitting device arranged on a printed circuit board and configured to emit light, and at least two receivers arranged on the printed circuit board in correspondence with the light-emitting device and configured to detect switching positions of the rotary switch. Further, the light-emitting device is mounted radially at an outside portion of inside of a hollow cylindrical extension of the control element, and wherein on level with the light-emitting device, the extension includes orifices evenly distributed around a periphery of the extension, and that opposite the light-emitting device, on an exterior side of the extension, the at least two receivers are arranged.