PURPOSE:To lighten the whole apparatus by using a magnet having a strong magnetic force only in a part requiring a large thrust. CONSTITUTION:A linear motor is used as a card conveyor means for a card reader-writer. A pair of yokes 1 each forming a U-shape in cross section as stator for said linear motor is immovably provided in both side parts of said main body. Also, a planar carriage 2 as a slider is supported slidably and its both side edge parts are received by said yokes 1 movably in the longitudinal direction. Further, a magnet part 4 is provided on the underside 3 of the yoke 1 and a three-pole coil 5 is connected with said carriage 2. In this case, two magnets 7, 8 at the starting end of the carriage 2 out of said magnet part 4 are formed by rare-earth magnets having a strong magnetic force and magnets 9 between said two magnets 7, 8, by ferrite magnets with a weak magnetic force. Thus, a large thrust can be secured at the time of starting an apparatus and it is also possible to control a tendency to a high cost.
展开▼
