A magnetic sensor having a thin film linear conductor section excited coil formed on a burr having a wound detection coil

摘要

The magnetic sensor includes an annular groove, and a burbing with one surface provided with an annular inductor housed in the groove. The annular inductor includes an annular core and an excitation coil wound around the annular core. The excitation coil comprises a plurality of thin film linear conductor conductor patterns each having a predetermined angular spacing and extending in a radial direction on one side of the bobbin and on the inner and lower surfaces of the annular groove, a circular core received in the groove, Wherein each of the connection wires is entangled on an annular groove and the core interconnects the inner end of one of the thin film linear conductors and the outer end of the next adjacent conductor of the thin film linear conductor. The conductor pattern and the connecting wire are connected to the annular core as an excitation coil wound around the annular core. Thus, the annular conductor is formed in the annular groove. The connecting wire is formed as a conductor pattern on the printing circuit board. In another embodiment, the annular conductor is formed on the printing circuit board, and the annular inductor is housed in the groove of the barbine without the conductor pattern by engaging the printing circuit board with the barbine.