| 摘要 |
PURPOSE:To realize an easy exchange for a transmitting/receiving coil only, if the coil is broken, by making a transmitting/receiving coil that is mechanically weak, to be detachable. CONSTITUTION:A transmitting/receiving coil 5 is formed on a nonconductive protecting member 23 such as the ceramics, polycarbonate, etc., and a contact terminal 22 is attached to the coil 5. These units are covered with a protective member 24 of the same material as the member 23 and unified into one body. Thus a transmitting/ receiving coil assembly 14 is formed. This assembly 14 is fitted to the tip of a center foot iron core 4 so that the terminal 22 touches and engages a socket 17 provided in a socket storing hollow part 16 at the tip of the core 4. Then the assembly 14 is pressed with a ring-shaped coil press plate 15 and fixed with a screw 18. |
