Drive devices and acoustic output devices containing the drive devices

Abstract

The present disclosure provides a drive device and an acoustic output device including the drive device. The drive device comprises one or more drive units, each drive unit having a beam-like structure, the beam-like structure including a vibration output end and a fixed end and extending from the fixed end toward the vibration output end. Each drive unit includes: a piezoelectric layer configured to cause the drive unit to output a vibration from the vibration output end in response to an electrical signal; and a reinforcement layer, wherein the reinforcement layer includes one or more reinforcement components arranged in an extension direction of the beam-like structure, at least one reinforcement component of the one or more reinforcement components being arranged close to the vibration output end and having a dimension not exceeding one-half of a distance from the vibration output end to the fixed end in the extension direction.