KEYBOARD Russian patent published in 1996 - IPC

FIELD: computer engineering. SUBSTANCE: keyboard has printed circuit mounted on the base, cover with sockets and keyboard mechanisms that consist of keys, and plungers with contacts and diaphragms. The plungers are received in the sockets for permitting longitudinal movement. The sockets are made up as cylindrical projections on the top and bottom sides of the cover. The diaphragm is made up as a cap in the middle portion and hollow cylinders at the top and base. The base of the diaphragm is mounted on the outer collar of the socket. The top of the diaphragm is mounted on the head of the plunger to protect the keyboard from environment. To arrest longitudinal movement of an actuator inside a socket a stop is provided. To prevent spontaneous falling out of the key mechanisms the plunger in the base is provided with bosses and axial opening in the stop is step. EFFECT: improved design. 7 dwg