Patent ID: 7349183
Filing Date: 2008-03-25
Classification: G11B

Abstract:
1. An actuator assembly for a hard disk drive, comprising: a slider with a read/write head mounted thereon; a suspension supporting the slider; an actuator arm rotatably coupled to a pivot shaft, in which the suspension is fixed to a front end of the actuator arm; and a voice coil motor rotates the actuator arm, wherein: the actuator arm includes a structure of a 4-bar linkage defined by an opening formed between the front end of the actuator arm and the pivot shaft; the opening has an approximately trapezoidal shape, in which a first rounded extension portion and a second rounded extension portion are formed at two corners adjacent to the pivot shaft of the opening, respectively, and a third rounded extension portion is formed at two corners adjacent to a front end of the opening, and hinges H a position vector corresponding to linkage H design factors determining a shape of the opening are optimized to meet the following relations for the structure of 4-bar linkage: