| CPC A61N 1/0541 (2013.01) [A61N 1/37223 (2013.01)] | 15 Claims |
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1. A method, comprising:
positioning a head wearable external component, including an axially magnetized magnet that defines a N-S direction and an antenna, on a portion of a user's head over an implanted cochlear implant including a magnet apparatus;
wherein the magnet apparatus includes a case that defines a central axis, a frame within the case and rotatable about the central axis of the case, and only two elongate diametrically magnetized magnets that are located in the frame, that each define a longitudinal axis and a N-S direction, that are rotatable about the longitudinal axis relative to the frame, and that are separated from one another by a fixed non-zero distance D1 that is perpendicular to at least one of the longitudinal axes;
wherein the elongate diametrically magnetized magnets are formed from magnetic material and define a configuration, and the axially magnetized magnet is formed from magnetic material and defines a configuration;
wherein the material and configuration of the elongate diametrically magnetized magnets are such that the elongate diametrically magnetized magnets are attracted to one another with an attraction force F1 and, absent a dominant magnetic force, will align with one another in the N-S direction;
wherein there is a distance D2 between the axially magnetized magnet of the positioned head wearable external component and the elongate diametrically magnetized magnets; and
wherein the materials and configurations of the axially magnetized magnet and the elongate diametrically magnetized magnets are such that, when the distance D2 is 12 mm, there is a magnetic attraction force F2, which is greater than the magnetic attraction force F1, between axially magnetized magnet of the positioned head wearable external component and the elongate diametrically magnetized magnets of the implanted cochlear implant.
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