INFORMATION PROCESSOR,申请号JP19960066436-传众专利搜索

INFORMATION PROCESSOR

申请公布号：JPH09259462(A)

申请号：JP19960066436

申请日期：1996.03.22

申请公布日期：1997.10.03

申请人：

TOSHIBA CORP

发明人：OTSUKA HIDEKI

分类号：G11B7/085;G11B7/12;G11B7/135;G11B19/12

主分类号：G11B7/085

摘要：PROBLEM TO BE SOLVED: To reduce the weight of a movable optical head and to shorten the seek time by separating a driving magnetic circuit rotating a shutter from the optical head. SOLUTION: When a disk D1 of DVD specification is used in the state where an opening part 19 with a small diameter of the shutter 17 is formed so as to have an opened amount for the CD specification while being confronted with a laser introducing port 16 of the optical head 2, carriages 10 are traveled to the side of the driving magnetic circuit 24 for shutter along guide shafts 11, 11 and stopped at the position where a magnet 21 for the shutter 17 is entered into a U-shaped yoke 25 inside. When a disk D2 of CD specifiction is used, the carriages 10 are traveled toward the side of circuit 24 along the shafts 11, 11 and stopped at the position where the magnet 21 for the shutter 17 is entered into yoke 25 inside. Then, the 1st opening part with small diameter is confronted with the laser introducing port 16, and the opened amount is decreased for the CD specification.