Abstract: An engaging head implemented in a movement converting mechanism to engage with a screwed rod comprises an attachment body, a gear part, and a resilient pre-loading element. The attachment body has a pushing sidewall. The gear part has an inner surface facing the pushing sidewall of the attachment body, and an opposite outer surface provided with gear teeth. The resilient pre-loading element is mounted between the pushing sidewall of the attachment body and the inner surface, and has a side abutting against the pushing sidewall and another side abutting against the inner surface of the gear part. Being compressed between the pushing sidewall and the inner surface, the resilient pre-loading element thereby exerts a pre-loaded engagement pressure that results in a deflection of the gear part to ensure an adequate engagement of the gear teeth with the screwed rod.

Abstract: A suspension device for an optical media storage device having a spindle motor. The suspension device includes a loader, a traverse and a dynamic mass. The traverse is disposed on the loader and has a first weighted end. The mass center of the traverse is on the first weighted end and the spindle motor is disposed on the first weighted end. The dynamic mass is disposed on the traverse and has a second weighted end. The mass center of the dynamic mass is on the second weighted end and the second weighted end is located above the first weighted end. Thus, when the spindle motor operates, the vibration of the optical media storage device is reduced tremendously.