| 摘要 |
PURPOSE:To access a magnetic disc at a high speed by giving a simple constitution to a carriage, which is a main body of a magnetic head access mechanism, without damaging its rigidity. CONSTITUTION:In the head access mechanism, a carriage constituting body 21 as the main body has a plane plate-shaped structure where punched holes 22 are provided in a ceramic plate material, and a part of the carriage constituting body is reinforced by a supporting member 29 to have a rib constitution, and the carraige constituting body 21 has a high rigidity as the whole and is made very light-weight. Consequently, when a movable coil 28 of the head access mechanism is inserted into a fixed magnetic circuit 31 while guided along guide rails 23 in upper and lower end parts, which are provided on the carriage constituting body 21, by a bearing 35 provided in the fixed magnetic circuit 31 to constitute a linear motor between this circuit and the head carriage constituting body, the carriage constituting body 21 is moved straightly at a high speed, and thus, each magnetic head 25 is positioned to a selected track position on a magnetic disc with a high precision. |
