Abstract: A rotating device for a cover connected to a housing of a disc drive. The rotating device includes a spring-loaded outer sleeve, a spring-loaded inner sleeve, a spring and a fixing place. The spring-loaded outer sleeve, having a first closed end and a first open end, is fixed to the cover and filled with damping material. The spring-loaded inner sleeve with the spring within has a second closed end with a key and a second open end inserted into the first open end of the spring-loaded outer sleeve. The fixing place is fixed to the housing of disc drive and includes an upper L-shaped member with an upper slot, a lower L-shaped member with a lower slot and a first end portion with a hollow to pivot the first closed end of the spring-loaded outer sleeve. The lower L-shaped member is bolted to the upper L-shaped member, and the upper slot and the lower slot are used to mesh the key of the spring-loaded inner sleeve.

Abstract: A clamping device for optical disk driver comprises a base plate, an upper clamping body and a plurality of sliding stages. The base plate has a through hole receiving the upper clamping body. The sliding stages are arranged on the base plate and around the through hole. The base plate has a sliding block and a control rod at predetermined positions. The sliding stage has a Z shaped groove and the upper clamping body is rotated to clamp an optical disk.