| 摘要 |
The present invention relates to a coupling device for attaching the external hearing aid part (5) to the skull bone 810) anchored part in a bone conducting hearing aid apparatus, whereby the retaining force in the coupling device is substantially established by means of a permanent magnet. The bone anchored part as well as the external hearing aid part (5) comprises a magnetic part (4 and 6, respectively) and at least one of these magnetic parts is a permanent magnet. If only one of the two magnetic parts (4, 6) is a permanent magnet, the other magnetic part should be made of a ferro-magnetic material. The magnetic part (4) of the bone anchored art of the hearing aid is preferably made as an annular device located in the skin penetrating spacer (1) of the hearing aid.
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