Patent ID: 7437970

Claim:
A stand tube of a bicycle comprising: a body; one end of the body formed with a U shape ear having two legs; each leg of the U shape ear having a pivotal hole; an outer side of each pivotal hole having a teeth portion; another end of the stand tube installed with a retaining portion; a head having one end formed with a round portion; the round portion having a transversal penetrating hole; an inner wall of the penetrating hole formed with a plurality of ribs; a buckling unit having a pivotal unit; a receiving hole penetrating through the buckling unit; each of two ends of the receiving hole being formed with a recess; an outer periphery of the buckling unit being formed with a plurality of trenches; the buckling unit passing through the two pivotal holes and the penetrating hole; the ribs of the round portion of the head being buckled to the trenches; two buckles; one surface of the buckle being protruded with a protrusion; a round area of the surface of the buckle around the protrusion being formed with teeth corresponding to the teeth portion of the U shape ear so that the teeth of the buckle being engageable to the teeth portion of the U shape ear; a screw unit received in the receiving hole of the pivotal unit; the teeth of two buckles being then engaged to the teeth portion of the U shape ear and the two protrusion are received into the pivotal hole.