Patent Number: 
Section: claims

1. A rotatable fixture, comprising:a base;a rotating disc pivotally connected to the base through a central axle and capable of rotating with respect to the base;a fastening frame uprightly fastened to the rotating disc for allowing a device under test to be securely fastened thereto; andat least one fastening member movably passing through the rotating disc and the base for fastening the rotating disc and limiting a rotation of the rotating disc with respect to the base;wherein the fastening frame includes a pair of fixing plates, the pair of fixing plates being secured to opposite surfaces of the fastening frame for allowing the device under test to be mounted thereon. 2. The rotatable fixture according to claim 1, wherein the central axle includes a central cone, a spring, and a headless screw bolt, all of which are sequentially mounted in a perforation which is located in the center of the base, the central cone being exposed through the perforation of the base for allowing the rotating disc to be mounted thereon. 3. The rotatable fixture according to claim 1, wherein the base is configured to provide support for the rotation of the rotating disc by at least four rolling steel ball assembly. 4. The rotatable fixture according to claim 3, wherein the rolling steel ball assembly includes a rolling steel ball, a rolling ball cushion, a spring, a spring cushion, and a headless screw bolt, all of which are sequentially superimposed in perforations of the base, such that the rolling steel balls are slightly exposed from their located perforations through the spring recoiling force when the rotating disc is rotating, thereby propping up the rotating disc. 5. The rotatable fixture according to claim 1, wherein each fixing plate includes a plurality of lock holes for fastening the device under test. 6. The rotatable fixture according to claim 1, wherein each fixing plate is secured to one side of the fastening frame by screws. 7. The rotatable fixture according to claim 1, wherein the fastening frame is formed of a H-shaped steel plate. 8. The rotatable fixture according to claim 7, wherein the H-shaped steel plate is configured as a hollow rectangle. 9. The rotatable fixture according to claim 1, wherein the fastening frame is set to be secured to the rotating disc, such that the basic natural frequency of the fixture is larger than 33 Hz.