Patent ID: 8422089

Claim:
A scanning device, comprising: a base; a guiding module, comprising: a guiding rod, fixed to the base; a guiding element, having a notch, wherein the guiding rod is slidingly disposed at the notch along a first axial direction; a sliding element, slidingly disposed at the guiding element along a second axial direction substantially perpendicular to the first axial direction; an elastic element, fixed to the guiding element and contacting with the sliding element to push the sliding element toward the guiding rod, wherein the sliding element pushes the guiding rod to contact an inner wall of the notch along the second axial direction by an elastic force of the elastic element; a scanning head, fixed to the guiding element; a driving motor, disposed on the base; a pulley, connected to the driving motor; and a belt, connected between the pulley and the scanning head, wherein the driving motor drives the pulley to rotate, so as to drive the belt to pull the scanning head to move along the first axial direction, wherein the guiding rod is a hollow cylindrical rod, and a part of the belt is pivoted to the guiding rod along the first axial direction, wherein the belt is partially located in the guiding rod.