Internal magnetic circuit and loudspeaker system incorporating the same

An internal magnetic circuit is formed by a plate forming a pole piece, a vertically magnetized magnet attached to a bottom face of the plate, and a yoke attached to a bottom face of the magnet. A magnetic gap is formed between the plate and the yoke. The yoke includes a bottom part attached to the...

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Bibliographic Details
Main Authors OHYABA TAKASHI, DOHI HIROYUKI, KOBAYASHI HIROYUKI, TERAUCHI SHOUICHIRO
Format Patent
LanguageEnglish
Published 10.10.2006
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Summary:An internal magnetic circuit is formed by a plate forming a pole piece, a vertically magnetized magnet attached to a bottom face of the plate, and a yoke attached to a bottom face of the magnet. A magnetic gap is formed between the plate and the yoke. The yoke includes a bottom part attached to the bottom face of the magnet, a side part standing on the side of the plate, and a folded-back part folding downwards over the side part to face the magnetic gap. Thus, the internal magnetic circuit having a uniform magnetic flux density inside the magnetic gap along the direction of its length is provided.
Bibliography:Application Number: US20030460649