ばね論文集
Online ISSN : 1348-1479
Print ISSN : 0385-6917
ISSN-L : 0385-6917
論文
小型磁気ディスク装置の位置決め機構の耐衝撃特性を向上する設計法
冨永 潤半谷 正夫西田 辰彦
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2008 年 2008 巻 53 号 p. 21-25

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In many cases, the compact type hard disk drive (HDD) is employed in mobile devices, and a shockproof design is essential for this kind of application. A swing arm type positioning actuator is vulnerable to the vibration of arm bending modes excited by natural frequency when the shock impulse is imposed. In this paper, we studied different kind of swing arm type positioning actuators. Their mass and geometry are close each other, however, their vibration characteristics are quite different when the shock impulse is imposed. It turned out that the big difference in vibration response comes from the frequency interval of two arm bending modes in the actuator. The vibration system of three arm actuator consists of the main vibration system with top & bottom arm and the sub vibration system with the middle arm. We established the design method to minimize the frequency interval of two arm bending modes in order to improve the shockproof capability by utilizing the dynamic damping effect.

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© 2008 日本ばね学会
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