Patent ID: 7111312

Claim:
A radial vibration detection apparatus for detecting the radial vibration value of an optical assembly of an optical disc drive, the optical assembly having a turntable, the turntable having a first part and a second part connected thereto, the first part having an iron element and a plurality of clamp elements extended to the second part, the radial vibration detection apparatus comprising: a cover having a cover body, a plurality of engaging elements and a circumferential flange, the engaging elements disposed on the lower surface of the cover body in an equiangular manner, the circumferential flange is formed on the cover body, the cover body having a magnet accommodating portion formed on the center thereof, wherein a first positioning element is disposed on the circumferential flange, and each of the engaging elements has a first sloped surface and a through hole; a magnet disposed in the magnet accommodating portion; a plurality of clamping structures sliding and disposed in the through holes of the engaging elements, respectively; and a base disposed under the cover and having a bottom, a circumferential wall and a second positioning element, the circumferential wall upwardly formed on the bottom, the second positioning element disposed on the circumferential wall to engage the first positioning element disposed on the circumferential flange of the cover, wherein the bottom is formed with a fitting hole and a plurality of through grooves, the fitting hole formed on the center of the bottom and accommodating the turntable, and the through grooves formed on the bottom in a radial and equiangular manner and corresponding to the clamp elements of the turntable.