| 摘要 |
PURPOSE:To prevent the generation of heat at a motor part and to ensure the stable writing and reading, by forming an opening part to the base near a spindle of a driving motor of a magnetic recorder of direct driving system. CONSTITUTION:A driving motor of direct motor driving system is provided with a coil 3 set between a bottom plate 1 and a base 16, a magnet 10, spindle 14, etc. A magnetic recording medium which is inserted into the spindle 14 is directly driven. An opening part 108 is formed at a place near the spindle 14 of the base 16, and a cooling air current is produced by a fin 110, etc. of a revolution detecting slit 12. Thus the generation of heat is prevented for the driving motor. As a result, no fault is caused by the generation of heat to ensure the stable writing and reading. |
