| 摘要 |
PURPOSE:To simplify a manufacturing work and to execute a low cost by arranging oppositely a part of a head chip composed of a pair of cores so as to constitute a magnetic gap, separating sufficiently a part except the magnetic gap and contacting the pair of the cores with a bridge core. CONSTITUTION:Between cores 51 and 52 in order to prevent the direct flow-in and flow-out of a magnetic flux, a member 54 composed of a nonmagnetic material such as glass and ceramic is filled. Consequently, a magnetic flux A to flow into the core 51 from a magnetic gap 53 flows B into a protruding part 31 as a bridge core and a magnetic flux B flows C out from the joining surface of the core 52 and flows C into the core 52. A magnetic flux C flows D out from the magnetic gap 53. Into the magnetic flux C path to flow out from the core 51 and flow into the protruding part 31, a loop 41 is arranged and into a magnetic flux C path to flow out from the protruding part 31 and flow into the core 52, a loop 42 is arranged. Consequently, an electromotive force to occur by loops 41 and 42 is added, flows at a coil 32, the extending destination of a coil 32 comes to be a coil 13, and therefore, the current flows at the coil 13 as it is and the corresponding current is outputted from a coil 14.
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