公开(公告)号：EP4152312A1

公开(公告)日：2023-03-22

申请号：EP21803240.7

申请日：2021-04-28

申请人： YAMAHA CORPORATION

发明人： NISHIDA Kenichi

IPC分类号： G10H1/34

摘要： Provided is a detection device for the key operation of a keyboard device, said detection device having: a key-side conducting part provided to each of a plurality of keys; a circuit board provided so as to face the plurality of keys in the direction in which the plurality of keys are pressed and released; a plurality of sensor units which each have a coil, are provided to the circuit board so as to correspond to each of the keys, and output a signal which corresponds to distance from the key-side conducting part provided to the corresponding key; and a detection unit for detecting the displacement in the front-rear direction and the position in the pressing/releasing direction of the corresponding key, on the basis of the signal outputted by the sensor units.