Keyboard device

A method for applying a key touching feeling in a keyboard device, the method comprising:

• a transmitting step of transmitting a driving force in response to key touching of a key using transmission means to a mass body which is turnably installed in a chassis;
• and
• a key touching feeling applying step turning the mass body by the driving force transmitted in the transmitting step and applying a key touching feeling due to a torque in accordance with the turning of the mass body,
• wherein the mass body in the key touching feeling applying step comprises an inner wheel and an outer wheel installed on a radially outward side of the inner wheel and is configured to serve as a component for transmitting a torque in one-way direction between the inner wheel and the outer wheel,
• wherein the transmission means in the transmitting step is engaged with one of the inner wheel and the outer wheel of the mass body, and
• wherein in the key touching feeling applying step, the torque is transmitted between the inner wheel and the outer wheel of the mass body at a time of key touching and the torque is not transmitted between the inner wheel and the outer wheel of the mass body at a time of key release.