Patent ID: 7602929

Claim:
A combination unit for attachment to a hearing aid, comprising an adapter shoe and an accessory, the adapter shoe having fastening means for mechanical engagement of the hearing aid, a first set of contact means for providing electrical contact to the hearing aid, gripping means for mechanically securing the accessory, and a second set of contact means, electrically connected to the first set of contact means and adapted for electrically contacting the accessory, the accessory having a set of accessory contact means for electrically contacting the second set of contact means, and, arranged laterally of the accessory contact means, catch means for mechanically engaging the gripping means, wherein the second set of contact means and the accessory contact means are arranged substantially in respective parallel planes, wherein at least one of the second set of contact means and the accessory contact means comprises resilient means for providing contact pressure substantially perpendicular to the parallel planes to ensure the electrical contact, and wherein the adapter shoe and the accessory are adapted to appear in the assembled state as a monolithic structure with flush walls.