Patent ID: 6172868
Filing Date: 2001-01-09
Classification: G06F,H01H

Abstract:
A keyboard device, comprising:a supporting plate;a key top raisable and lowerable above the supporting plate;a first lever portion having one end slidably retained by a housing member in accordance with displacement of the housing member and having the other end rotatably retained by the key top at a back side of said key top;a supporting member affixed to and disposed at the supporting plate, the supporting member separated from the housing member;a second lever portion having one end rotatably retained by the supporting member and the other end slidably retained by the key top at the back side of said key top, the other end of the second lever portion being separated from the other end of the first lever portion; anda membrane switch disposed between the housing member and the supporting member, the membrane switch being affixed to the supporting plate;wherein said first lever portion and said second lever portion are combined through a shaft member into the shape of a cross; andwherein the housing member is slidably retained, with the sliding movement of the housing member causing said first lever portion and said second lever portion combined into the shape of a cross to be one of raised and lowered in accordance with a sliding direction of the housing member.