Patent ID: 7082323
Filing Date: 2006-07-25
Classification: G05G,G06F,H01H

Abstract:
1. A mobile navigation device comprising: (1) a roller comprising an insulated bushing and a conductive ring, wherein said insulated bushing and said conductive ring are in a shape of hollow ring, and one side of an inner surface of said insulated bushing comprises a plurality of protrusions and said conductive ring comprises a plurality of slots, and said plurality of slots on said conductive ring is corresponding to said plurality of protrusions on one side of inner surface of said insulated bushing to plug said conductive ring into said insulating bushing; (2) a support comprising two braces, wherein said braces comprise a corresponding cantilever for each, and said cantilevers are plugged into said conductive ring to sustain said conductive ring and said insulated bushing; (3) a plurality of terminals, wherein said plurality of terminals are plugged into said conductive ring producing prestress on the inner surface and at least a pair of said terminals are plugged into said conductive ring at a depth no deeper than a bottom of said slot, and said plurality of terminals is extended out of said conductive ring to connect with default circuit contact; and (4) a body comprising a plurality of fixture parts on one end surface of said body to fix said support, and a plurality of raised spots on two opposite sides of the other end surface of said body.