Patent ID: 9704672
Date: 2017-07-11
CPC Classifications: H01H

Claim:
1. A backlit keyboard comprising: at least one light guide plate; an opaque support plate including at least one space each with the light guide plate disposed therein; a plurality of light emitting elements embedded within the light guide plate; a circuit board including a plurality of elastic members on a top, the circuit board secured onto the support plate to cover the light guide plates; a plurality of keycaps each with the elastic member disposed therein and including at least one limit member; and a housing frame including a plurality of openings each with the keycap slidably disposed thereon, and a plurality of spacers each formed at either side of the opening to make the keycap move straight up and down and the spacer can limit a vertical distance of the limit member of the keycap; wherein the spacer is fitting between two adjacent limit members that belong to each adjacent keycap and urges against the circuit board; and wherein in response to pressing the keycap, the limit members are configured to travel a vertical distance less than height of the spacer.