Mounting apparatus for optical sensor having screw piles with annular fitting boards

An optical scanner module, used scan a document, comprising:

• a main body;
• a light source, disposed in the main body to radiate the document, so as to obtain an image light;
• a reflecting mirror set, installed in the main body along an optical path of the image light;
• an optical lens, located along the optical path after the reflecting mirror set;
• an optical sensor, mounted in the main body and located along the optical path after the optical lens, the optical sensor having a base plate with a plurality of through holes;
• a plurality of screw piles, each of which has a nut side, a bolting side, and an annular fitting board therebetween, wherein each nut side is threaded into one of the through holes;
• and
• a plurality of screw nuts, screwed with the screw piles at the nut sides, so that the base plate is restrained between the annular fitting boards and the screw nuts.

A method, comprising:

• disposing a bolting side of one or more screw connectors through one or more threaded holes in an optical scan module;
• and
• disposing a nut side of the one or more screw connectors through one or more through holes in an optical sensor base plate, the optical sensor base plate coupled to an optical sensor;
• and
• engaging one or more nuts to the respective nut side of the one or more screw connectors to mount the optical sensor base plate to the optical scan module, wherein the optical scan module includes an optical lens forming at least a portion of an optical path, such that the optical sensor is mounted substantially in the optical path of the optical lens.