Patent ID: 7559603

Claim:
A bicycle seat tube adjusting assembly, comprising: a rod body which is installed with a positioning seat; a positioning unit resting against the positioning seat, the positioning unit having two slots defined in a top thereof and extending therethrough, the positioning unit having two through holes formed in a side edge and extending laterally into the positioning unit such that each through hole joins one of the two slots; a second clamping unit connected to the positioning unit, the second clamping unit having two channels formed in a top thereof and two protrusions extending from a bottom thereof, each protrusion movably received in one of the two slots in the positioning unit; a first clamping unit connected to the second clamping unit, the first clamping unit having two channels formed in a bottom thereof, each channel in the first clamping unit corresponding to one of the two channels in the second clamping unit for clamping a cushion rod; and two tightening units respectively passing through the two through holes in the positioning unit and abutted against the two protrusions in the second clamping unit; wherein the first clamping unit and the second clamping unit are driven to move when screwing the two tightening units.