Patent ID: 7392071

Claim:
A rotary module, disposed in an electronic product for allowing a relative rotation between a first portion and a second portion of the electronic product, the rotary module comprising: a supplement module; a holding device, comprising: a positioning groove, for placing the supplement module; a hollow sleeve, having an insertion hole; and a securing portion, for securing the holding device on the first portion of the electronic product; a hinge assembly, disposed in the insertion hole, and two ends of the hinge assembly respectively connected to the holding device and the second portion so as to allow the relative rotation between the first portion and the second portion; and a flexible printed circuit board, comprising: a first connecting end, electrically connected to the supplement module; a second connecting end, electrically connected to one of the first portion and the second portion of the electronic product; an extending portion, jointing the first connecting end and the second connecting end, and a portion of the extending portion winding around an outer surface of the hollow sleeve; wherein the holding device and the supplement module are simultaneously rotated with the first portion when the relative rotation between the first portion and the second portion of the electronic product is performed.