Patent ID: 7385149
Filing Date: 2008-06-10
Classification: H01H

Abstract:
1. A pushbutton mechanism for keyboards, comprising: a bridge for a pushbutton of a keyboard, the bridge including an inner frame and an outer frame that are intersected and coupled together, and having one end coupling with a key cap and another end coupling with a base plate, the key cap and the base plate being interposed by a signal triggering means, wherein the outer frame has two outer side brackets each having a harness recess and a pivot portion, and the inner frame has two inner side brackets each having a harness boss corresponding to the harness recess and a stub shaft corresponding to the pivot portion, the inner frame and the outer frame being turnable relatively to each other through coupling of the stub shaft and the pivot portion, the harness boss being movable in the harness recess to define a lifting position and a lowering position for the pushbutton in normal conditions, wherein the harness recess and the pivot portion communicate with each other, and wherein the harness recess has at least one first chamfered and tapered surface on one side inclined from a upper end thereof to the pivot portion.