Tilt-angle adjusting apparatus for a cover of a lap-top computer

摘要

A combination LCD screen and keyboard cover 21 of a lap-top computer is hinged to a main or keyboard body by apparatus which comprises a pair of bracings 51 which extend from one side of the cover and are hinged by hinge shafts 61 to a carriage casing 41 vertically slidable in a convex-shaped fixed housing 31 of the main body, a pair of racks 33 fixed to the rear wall of the housing 31 and a mating pair of pinions 71 on the carriage casing 41 driving means including gears 63 fixedly mounted on the hinge shafts for rotating the pin ions so as to climb the racks and thereby lift the carriage casing when the cover 21, to which the shafts 61 are keyed is pivoted and friction bands 65 wound around one end 64 of the hinge shafts in order to hold the tilted cover in place.