READ/WRITE HEAD FOR OPTICAL DISK DRIVE AND OPTICAL DISK DRIVE COMPRISING SUCH A READ/WRITE HEAD

摘要

Read/write head is used for CD drive,Including a lens carrier( 8 ),Support frame( 11,12,16 ),Tool( 15 )For hanging lens mount( 8 )In braced frame,This means that movement is restricted to lens( 8 )Relative to support frame,Only allow at least limiting translation( )The lens of optical axis are parallel in focus direction z( 7 )In lens mount( 8 ),At least limited tracking direction(Translation),Perpendicular to focus direction z( ),At least limited rotation is around axis in tangential direction( ),The focus and above-mentioned all vertical tracking direction,Actuation means,Including only two conductive focussing coils( 9,10 )Focus direction z is parallel to winding axis( ),Each position is relative to magnetic circuit( 11,12 ),Therefore,Flow through coil( 9,(110 power generated are in lens bracket( 8 )With braced frame(In focus direction z. By lens carrier mass center (8) on the opposite side for the plane that two focus coils (9,10) of wireline reel are located at, and it is parallel to focusing and tangential direction. Focus coil (9,10) is spaced apart with tangential direction x.