| 摘要 |
PROBLEM TO BE SOLVED: To provide an inductance element which prevents a magnetic flux leakage around a winding while restraining magnetic saturation, is improved in manufacturability and mechanical shock resistance, and is reduced in size. SOLUTION: The inductance element 10 is equipped with a drum-type core 1 which is integrally composed of a core unit 2, and flanges 3 and 4 that are formed of ferrite. A winding 5 is wound on the core unit 2 of the drum-type core 1, and a magnetic gap 20 is provided between the upper flange 3 and the lower flange 4. The magnetic gap 20 is blocked with a rubbery ring 6 loaded with magnetic powder. The rubbery ring 6 loaded with magnetic powder is integrally formed of a dangling part 6a which is brought into contact by pressure with the side peripheral part of the upper flange 3 of the drum-type core 1 by its own rubbery elastic force, and a fitting part 6b which is fitted into the magnetic gap 20 coming into close contact with the core 1 by its own elastic force. COPYRIGHT: (C)2005,JPO&NCIPI
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