Inner-sensor based pointing device

A pointing device comprising:

• a roller assembly, the roller assembly comprising:
• a central housing in the form of a hollow tube, the tubular central housing having an aperture being provided in a surface of said tubular central housing;
• a sleeve disposed to fit over a portion of said tubular central housing by bushings, said bushings allowing said sleeve to rotate about said portion of said tubular central housing and to slide along a generally horizontal axis about said portion of said tubular central housing;
• a sensor within said tubular central housing, said sensor being positioned proximate to and aligned with said aperture, said sleeve positioned surrounding said sensor, and wherein said sensor is capable of detecting rotational movement of said sleeve relative to said tubular central housing and wherein said sensor is capable of detecting axial movement of said sleeve relative to said tubular central housing;
• and
• a circuit comprising a circuit board contained within said tubular central housing in communication with said sensor, said circuit capable of transmitting data to a computer regarding said movement of said sleeve;
• and
• a support supporting the roller assembly at the ends of the central housing, the support allowing downward movement of the roller assembly when a user pushes down on the roller assembly to initiate a click operation;
• and
• at least one switch arranged to detect the downward movement of the roller assembly.