Patent ID: 7958600

Claim:
A pivot mechanism, comprising: a pedestal, provided with a bore passing through the pedestal; a shaft, inserted in the bore, wherein the shaft is a polygonal shaft having at least two leaning surfaces parallel to an extension direction of the shaft; two bushes, surrounding the shaft and respectively disposed at two opening ends of the bore, wherein each bush is provided with an external diameter to be wedged in the bore and an internal diameter to lean and locate the shaft; and a reed set, disposed in the bore and placed between the two bush, wherein the reed set includes at least one annular reed, each annular reed has a hole, the shaft passes through the hole of each annular reed, each annular reed has at least one position limiting portion formed in the periphery of the hole for orienting the shaft, the position limiting portion has at least one slot extending inwardly away from the hole and a cantilever formed between the slot and the hole for leaning against the shaft, when the shaft is oriented in the bore the cantilever leans against one of the leaning surfaces of the shaft, each annular reed further has a locating portion at the outside periphery and the locating portion is wedged in the bore, the hole of each annular reed has an internal diameter smaller than an external diameter of the shaft, the annular reed is elastically deformed by the insertion of the shaft, and an external diameter of each annular reed is smaller than an internal diameter of the bore for the elastic deformation of the annular reed.