Thin keyboard having multiple hinge members per keyswitch

Abstract

A keyboard apparatus is provided for small and lightweight computers and the like. Keyswitches and a keyboard assembly comprise a sheet member having a plurality of key faces fixed thereon in a conventional keyboard arrangement. A plurality of cutouts are provided in the sheet member, partially surrounding each key face. Two living hinge members are provided in the sheet member, preferably at opposite sides of the cutout. Each living hinge member includes a base section, an intermediate section, and a key face section. The former two and the latter two sections each interface at a living hinge. Depressing the key face causes the key face sections of each of the hinge members to pivot about the living hinges to operate a corresponding set of electrical contacts, indicating operation of the key. The multiple hinge members provide stability to the downward motion of the key face, providing goood functionality and tactile feel. In a preferred embodiment, a first one of the hinge members includes a relatively wide key face section with a notch in the middle. The notch accommodates a relatively narrow key fact section of the second hinge member, so that the second hinge member nests within the first hinge member when the key face is depressed.