Sound transducer including a piezoceramic transducer element integrated in a vibratory diaphragm

US11583896B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Andre Gerlach · Leonberg, DE
• Johannes Henneberg · Weil im Schönbuch, DE

Key dates

• Filing date: Mar 23, 2018
• Grant date: Feb 21, 2023
• Expiry date: Mar 11, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/88
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A sound transducer, in particular, for an ultrasonic sensor, includes a functional group, the functional group including a diaphragm cup and at least one electroacoustic transducer element. The sound transducer also includes a housing. The diaphragm cup includes a vibratory diaphragm and a circumferential wall, and at least one electroacoustic transducer element, the transducer element being configured to stimulate the diaphragm to vibrate and/or to convert vibrations of the diaphragm into electrical signals. The diaphragm cup is formed from a plastic material, the at least one transducer element being integrated into the vibratory diaphragm, in particular without an additional adhesive layer, the transducer element including a piezoceramic element.