A voice coil includes a bobbin formed of a wooden sheet obtained by slicing natural wood to a predetermined thickness and a coil that surrounds an outer circumference of the bobbin.
申请公布号
US8160291(B2)
申请公布日期
2012.04.17
申请号
US20080222910
申请日期
2008.08.19
申请人
IMAMURA SATOSHI;KAMIMURA SHINJI;IINO JUNJI;VICTOR COMPANY OF JAPAN, LIMITED
