Actuator assembly, hard disk drive and method for optimizing shape of opening formed in actuator arm

An actuator arm of an actuator assembly includes a 4-bar linkage structure defined by a trapezoidal shaped opening formed between a front end of the actuator arm and a pivot shaft. A first rounded extension portion and a second rounded extension portion are formed at two corners adjacent to the pivo...

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Bibliographic Details
Main Author OH DONG-HO,BYUN YONG-KYU,KIM CHEOL-SOON,LEE HAENG-SOO
Format Patent
LanguageEnglish
Published 07.06.2006
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:An actuator arm of an actuator assembly includes a 4-bar linkage structure defined by a trapezoidal shaped opening formed between a front end of the actuator arm and a pivot shaft. 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 H1, H2, H3 and H4 are formed at the actuator arm by the first, second and third extension portions. Design factors determining a shape of the opening are optimized to meet the following relations for the structure of the 4-bar linkage: W(cos beta-1)+Z(cos alpha-1)=deltax=0, W sin beta+Z sin alpha=deltay=0.
Bibliography:Application Number: CN200510117359