Vibrator for bone conducted hearing aids
First Claim
1. A vibrator for bone conduction type hearing aid devices in which sound information is mechanically transmitted via the skull bone directly to the inner ear of a person with impaired hearing, the vibrator comprising:
- a two-piece coil operative to generate a dynamic magnetic field;
an intermediate central wall between the two coil pieces; and
an annular permanent magnet operative to generate a static magnetic field in a magnetic circuit, the permanent magnet being located on the central wall between the two coil pieces, such that the static magnetic field and dynamic magnetic field cooperate in the magnetic circuit, while the dynamic field does not pass through the permanent magnet, in order to provide the vibrator with an axial force generation.
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Accused Products
Abstract
A vibrator for a bone conduction-type hearing aid device by which sound information is mechanically transmitted via the skull bone directly to the inner ear of a person with impaired hearing. The vibrator includes a coil that is directly into two coil halves for generating a dynamic magnetic field and a permanent magnet for generating a static magnetic field. The permanent magnet is radially magnetized and arranged in such a way that the static and dynamic magnetic fields coincide in air gaps formed between the coil and magnet arrangement and the casing, whereby the vibrator provides an axial force.
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Citations
14 Claims
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1. A vibrator for bone conduction type hearing aid devices in which sound information is mechanically transmitted via the skull bone directly to the inner ear of a person with impaired hearing, the vibrator comprising:
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a two-piece coil operative to generate a dynamic magnetic field; an intermediate central wall between the two coil pieces; and an annular permanent magnet operative to generate a static magnetic field in a magnetic circuit, the permanent magnet being located on the central wall between the two coil pieces, such that the static magnetic field and dynamic magnetic field cooperate in the magnetic circuit, while the dynamic field does not pass through the permanent magnet, in order to provide the vibrator with an axial force generation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A bone conduction hearing aid device, comprising:
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an external part comprising a microphone and electronic circuitry; an internal, implantable part to be anchored subcutaneously into the skull bone; and a vibrator arranged in the implantable part, the vibrator comprising a two-piece coil operative to generate a dynamic magnetic field, an intermediate central wall between the two coil pieces, and an annular permanent magnet operative to generate a static magnetic field in a magnetic circuit, wherein the permanent magnet is located on the central wall between the two coil pieces, such that the static magnetic field and dynamic magnetic field cooperate in the magnetic circuit, while the dynamic field does not pass through the permanent magnet, in order to provide the vibrator with an axial force generation. - View Dependent Claims (12, 13, 14)
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Specification