Patent ID: 7817415

Claim:
A height adjustment mechanism disposed in a body, comprising: at least one axle seat disposed on the body; a spindle, rotatably fitted in the axle seat; a positioning part, fitted on the spindle and having a plurality of grooves; at least one support part disposed in the axle seat, wherein the support part has a fitting hole, and the spindle passes through the fitting hole, so as to rotate with the spindle simultaneously, and one of end surfaces is pressed against a plane, such that different height differences exist between the body and the plane; and a stop component, corresponding to the positioning part and movably disposed in the body, wherein the stop component moves between a stop position where the spindle is fixed and a release position where the spindle is allowed to rotate freely, wherein the stop component comprises a movable part for driving the stop component to move to the stop position and the release position.