Patent ID: 11889247
Assignee: OTICON MEDICAL A/S
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A transcutaneous bone-anchored hearing aid device for a recipient patient comprising:
a receiver coil for transcutaneous receiving of an externally generated communication signal;
a signal processor configured for converting the externally generated communication signal into an electrical stimulation signal, and
an electromagnetic vibrator configured for receiving the electrical stimulation signal, the electromagnetic vibrator including a housing in which is housed:
a coil unit configured to generate a dynamic magnetic flux based on the electrical stimulation signal,
a permanent magnet configured to generate a static magnetic flux,
a mass unit connected to the permanent magnet,
a bobbin unit configured to engage with the coil unit, the permanent magnet, and the mass unit,
a spring unit configured for maintaining an air gap below a moving mass, wherein the moving mass includes the coil unit, the permanent magnet, the mass unit and the bobbin unit, and where the moving mass and the spring unit are configured to generate an acoustical vibration,
a vibrator plate configured to receive the acoustical vibration, and where the air gap is between the vibrator plate and a part of the moving mass,

wherein the electromagnetic vibrator includes a demodulator unit configured to receive and demodulate the electrical stimulation signal and to transmit a demodulated electrical stimulation signal to the coil unit, and
wherein the demodulator unit is arranged to fit in a cavity of the bobbin unit or the mass unit, or the demodulator unit is arranged in an air-gap between the bobbin unit and an upper surface of the electromagnetic vibrator.