Positioning module and handheld scanner using the same

A handheld scanner comprising:

• an image capture unit configured to capture plural image data along a scan path on a surface of an object;
• and
• a positioning module connected with the image capture unit, wherein while the image capture unit captures plural image data along the scan path on the surface of the object, the positioning module generates plural sets of positioning data relative to the plural image data, and comprises:
• a base comprising an accommodation space, a through hole and an opening, wherein the through hole is relative to the opening, and the through hole and the opening are communicated with the accommodation space;
• a rotation support member connected pivotally with the base by passing through the through hole and rotated relative to the base about a first axis, wherein the rotation support member comprises a main body and a rotary plate, the rotary plate is centered on the first axis, and the main body is received in the accommodation space and extends along a direction from the through hole to the opening;
• a shaft body connected pivotally to the main body of the rotation support member;
• a wheel connected pivotally to an end of the main body of the rotation support member and relative to the shaft body, wherein the wheel is in constant contact with the shaft body and partially passes through the opening, wherein while the wheel is affected by a frictional force and rotates about a second axis, the main body is moved to generate a linear displacement and the shaft body is rotated, wherein the second axis is offset from the first axis, wherein while the wheel is affected by the frictional force, the wheel drives the main body of the rotation support member to rotate about the first axis at an angular displacement;
• a first sensor disposed on the rotation support member and configured to detect rotation of the shaft body to obtain the linear displacement of the main body;
• and
• a second sensor disposed on the base and configured to detect the rotary plate to obtain the angular displacement of the main body of the rotation support member, wherein each set of positioning data includes the linear displacement and the angular displacement.