| 摘要 |
PURPOSE:To simplify the constitution of a receiver, to reduce the number of parts and to economize the receiver by providing an electrode made of a conductive material which can be approximately fitted into the external auditory of a human body, an electrically insulating layer installed on the peripheral surface of the electrode and a telephone code whose one end is connected to the electrode. CONSTITUTION:The electrode 10 is made of a conductive organic material such as a hard conductive rubber material or a conductive metal such as aluminum and has a size and shape capable of being inserted into the external auditory of the human body, a truncated cone or cylindrical shape, for instance. The electrically insulating layer 11 is installed at least the outer peripheral surface of the electrode 10. It is formed by the adhesion of a nonconductive organic layer or by coating a nonconductive organic material, or it can employ a film available from forming a polarization on an insulating film in a thickness direction, so called electlet film and it may use an organic pressure film such as polyvinylidene fluoride. The receiver is electrically connected in such a way that one end of a telephone cord 112 is fixed on the electrode 10 and a receiver cord is a single-core cord. |
