KEYBOARD INSTRUMENT STRUCTURE CAPABLE OF INSPECTING GENERAL OPERATION OF ELECTRONIC CIRCUIT AND COMPONENTS

摘要

PURPOSE: A keyboard instrument structure capable of inspecting general operation of an electronic circuit and components is provided to realize high work efficiency in producing keyboard instruments. CONSTITUTION: A main body(50) of an electronic grand piano has a plurality of keys(52) arranged on a keyboard(51). Each key is pivotally supported by a balance pin(56). A plurality of action parts(62) are arranged at a rear of the keys, including a hammer(62b) and other components driven when the key is operated. An electronic circuit unit(20) is arranged under the keyboard for generating tone. An input and output unit(24) is arranged on a right side of the electronic circuit unit. A pair of slide parts(22) are formed at upper positions of right and left sides of the electronic circuit unit. A pair of guide parts(23) are loosely combined with the slide parts so that the electronic circuit unit is freely moved in direction that the slide parts slide in association with the guide parts, while being stopped at a predetermined position of controlling a position of a rear end of the slide part to the keyboard.