Patent ID: 7362201
Filing Date: 2008-04-22
Classification: H01F

Abstract:
1. An inductance device comprising: a hollow center coil including a conducting wire which is wound so that a hollow portion is formed along a center axis line of the hollow center coil; a filler which is filled into the hollow portion of the hollow center coil, and includes magnetic powder or a compound including the magnetic powder, an accommodation case made from a magnetic iron nickel alloy material containing the hollow center coil, the accommodation case having a bottom and an opening opposite the bottom, and being filled with the filler, wherein the conducting wire of the hollow center coil is in direct contact with the filler; a sealing material sealing the opening of the accommodation case; and at least one tongue piece provided at the opening of the accommodation case and bent inward against the sealing material for retaining the sealing material at the accommodation case opening.