DISK MOTOR AND OPTICAL DISK UNIT USING IT,申请号JP20010070290-传众专利搜索

DISK MOTOR AND OPTICAL DISK UNIT USING IT

申请公布号：JP2002272069(A)

申请号：JP20010070290

申请日期：2001.03.13

申请公布日期：2002.09.20

申请人：

HITACHI LTD

发明人：KUMASAKA TAKAYUKI;TSUBOTA SHINYA;KOBAYASHI HIROAKI;SHIBATA MITSURU;SUZUKI YOSHIO;SATO HIDEKAZU

分类号：G11B19/20;H02K15/16;(IPC1-7):H02K15/16

主分类号：G11B19/20

摘要：PROBLEM TO BE SOLVED: To accurately reduce weight eccentricity in a disk motor which is one of the causes of vibration and noise in an optical disk unit. SOLUTION: The disk motor of disk replacement comprises a stator portion including a coil for rotational driving and a rotor portion provided with a rotating shaft and magnets for rotational driving and is provided with a turntable which is fixed at the upper part of the rotating shaft and on which a disk is loaded. The rotor yoke thereof is provided with a flange around the open portion located at the lower end of the yoke, and notches are formed in part of the flange to correct weight eccentricity in the rotor assembly. Further, the optical disk is provided with two or more rotor stoppers to prevent the rotor from coming off.