Computer data input device, has trackball provided smooth as glass, and hollowed edge support of self-lubricating material support for supporting trackball, and electrical switch provided between trackball and substrate

摘要

The device has a trackball (1) provided smooth as glass. A hollowed edge support of self-lubricating material support supports the trackball, where the self-lubricating material is selected from a group consisting of carbon, Nylon, ertalon-nylon, Ertalon Cast Polyamide, Cast Nylon Polyamide. The trackball is placed in a keyboard. Two sides of a casing (2) protrudes from the keyboard such the trackball to two opposite sides. An electrical switch is provided between the trackball and a substrate, where switch contact or interruption is caused while pressing against the trackball.