Actuating device for keys of e.g. piano, has electromotor coupled with keys in intermediate arrangement of actuators, where electromotor exerts actuation force that is linear over electromotor working path and is proportional to current

摘要

The device has an electromotor (2) coupled with keys (3, 4) of a key instrument in an intermediate arrangement of actuators (6). The electromotor is coupled with a drive, and is arranged opposite to the keys with a longitudinal axis of the electromagnets parallel to the longitudinal extension of the keys. The electromotor exerts an actuation force to the corresponding key, where the force is linear over the entire working path of the electromotor and is proportional to the current supplied to the electromagnet.