| 摘要 |
PURPOSE:To prevent a fault at read time by constituting a draw bolt of a rotation part having a thread part and a fixed part having a fitting face and fitting a magnetic head arm in parallel with a magnetic disk to prevent the deviation due to the difference between thermal expansion coefficients. CONSTITUTION:The draw bolt 1 is constituted of the fixed part 1b having a contact fitting face 1c and the rotation part 1a provided with a thread screwed to a screw provided to the fixed part 1b and provided with a tightening screw. In fitting the magnetic head arm 2 to a carriage 4, the bolt 1 whose rotation part 1a is screwed to the fixed part 1b is inserted to a fitting hole 4a of the carriage 4 and the arm 2 is arranged so as to bring the fitting face 1c into contact with the fitting part 2a of the arm 2, the rotation part 1a is tightened by a nut 3 and fixed by tensing toward the arrow A. In tightening the nut 3, the tightening torque is not delivered to the fixed part 1b and the arm 2 is brought into press contact in parallel with the carriage 4 to prevent the relative deviation due to thermal expansion difference caused by ambient temperature difference.
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