Patent ID: 6950038

Claim:
A collapsible keyboard, comprising: a keyboard chassis; a right track frame slidably disposed on the keyboard chassis and sliding rightward and leftward, the right track frame having a first sloped sliding groove, wherein the left portion of the first sloped sliding groove is higher than the right portion of the first sloped sliding groove; a right key set movably connected to the right track frame, the right key set driving the right track frame move rightward to a right expansion position when the right key set moves rightward, the right key set driving the right track frame move leftward to a right contraction position when the right key set moves leftward; a main key set having a right protruding element, the right protruding element formed on the right side of the main key set and slidably received in the first sloped sliding groove, whereby, when the right track frame is moved to the right expansion position, the right protruding element of the main key set slides to the left portion of the first sloped sliding groove so that the right side of the main key set rises to a first rising position, whereby, when the right track frame is moved to the right contraction position, the right protruding element of the main key set slides to the right portion of the first sloped sliding groove so that the right side of the main key set lowers to a first descending position, the first descending position is lower than the first rising position.