초록

An improved linear actuator for reciprocating a read/write head mechanism relative to magnetic disk storage system is disclosed, including a second, supplemental solenoid coil and associated magnet means in addition to the usual arrangement, and by way of improving linearity and efficiency.

대표청구항 ▼

A method of making an improved electromagnetic actuator means including the steps of: providing a bobbin structure arranged so as to be reciprocatable along a prescribed path; disposing first and second magnet means along this path, these magnet means being arranged to include respective first and s

A method of making an improved electromagnetic actuator means including the steps of: providing a bobbin structure arranged so as to be reciprocatable along a prescribed path; disposing first and second magnet means along this path, these magnet means being arranged to include respective first and second magnetic pole means, arranged so the bobbin structure can pass operatively adjacent thereto as it proceeds along said path, past the pole means then presenting magnetic flux which is electromagnetically interactive with the bobbin structure; said pole means being opposite in magnetic polarity to one another; and mounting first drive-coil means and second drive-coil means on said bobbin structure so as to magnetically interact with said flux from said first and second pole means and so generate a prescribed force driving said bobbin structure along said path.