Patent ID: 7858864
Filing Date: 2010-12-28
Classification: G10C,G10H

Abstract:
1. A key actuating apparatus for actuating a key depressible by a user, said key rotationally movable and is attached to a frame, said key actuating apparatus comprising: a rotationally movable lever connected to a front end portion of the key and having a length corresponding to a longitudinal direction of the key; a plunger that is affixed to one of said key and said lever, and is rotationally moveable in correspondence with a rotational motion of the key, said plunger formed in an arc shape extending in a direction of a rotational motion of the plunger; a solenoid affixed to the frame and having an electro magnet that is substantially in a cylindrical shape, wherein the plunger is positioned inside said solenoid, wherein a first end of the plunger in a lengthwise direction comprises a magnetic body, and wherein the plunger is movable on an arc or curved line in accordance with the rotational motion of the key so as to prevent backlash between the movable lever and the plunger.