Patent ID: 6950093

Claim:
A mouse handled by a hand comprising: a) a house; b) at least one switch button connected to the house; c) a trackball; d) a brace connected to the house and having: i) a first layer having a cover ring and a plastic ring located on an internal circumference of the plastic ring between the cover ring and the trackball; and ii) a second layer having at least three ball bearings and a micro switch located between the at least three ball bearings, each of the at least three ball bearings being pressed against the trackball by a spring, the micro switch releasably engaging the trackball at a point between the at least three ball bearings, the first and the second layers engaging opposite sides of the trackball; and e) a tracing trackball apparatus engaging the trackball and collecting trackball-rolling information from movements of the trackball, wherein the track ball is rotatably positioned in the brace and movable between first and second positions, in the first position the at least three ball bearings press the trackball against the plastic ring of the first layer, and, in the second position, the trackball compresses each spring of the at least three ball bearings and engages the micro switch of the second layer.