Coupling for use in the securing of a hook-shaped sound part on a behind-the-ear hearing aid

摘要

A coupling for use in securing a hook-shaped sound part on a behind-the-ear hearing aid consists of a two part connector with a free position in which the parts can be assembled and separated, and a coupled position in which the hook-shaped part can be turned in relation to the hearing aid. A coupling link with a plug-shaped part is inserted in the hearing aid so that the plug-shaped part extends outside the aid and can engage with a coupling hole formed in the hook-shaped part. On the plug-shaped part of the coupling link there is a partly circular groove which can engage with a projecting wall part in the form of a dowel inserted in a hole at right angles to the coupling hole. An O-ring is disposed between the two parts and around the plug-shaped part of the coupling link. When the plug-shaped part of the coupling link engages with the projecting wall of the hook-shaped part, the coupling is in its free position. When the hook-shaped part is turned away from this position, the two parts are locked together. One thus achieves a coupling without a thread and which is easy to operate when the hook-shaped part is to be removed for replacement or cleaning.