Key switch apparatus for electronic musical instruments
AssigneeKabushiki Kaisha Suzuki Gakki Seisakusho
InventorMinoru Nagashima
Life of this patent
Estimating the term…
Abstract
The size of the key switch apparatus, particularly its height, is reduced to allow its use even in keyboard-type electronic musical instruments. By virtue of a key-driven actuator, multiple terminal strips are allowed to contact bus bars 20a-21e installed in more than one stage so as to produce multiple tones simultaneously. In this key switch apparatus, the multiple bus bars 20a-21e are installed, being shifted in location in their respective stages, and multiple terminal strips 24a-25e are also installed in each stage so that they may contact the individual bus bars individually. In addition, the actuator has a terminal-strip engaging means for controlling the movements of the multiple terminal strips 24a-25e.
Claims5
A key switch apparatus for use in electronic musical instruments having a structure in which multi-stage bus bars are allowed to contact multiple terminal strips by a key-driven actuator so as to produce multiple tones simultaneously;
- wherein multiple bus bars are installed with intervals in each stage, multiple terminal strips are installed so as to contact said multiple bus bars individually in each stage, and a terminal-strip engaging means for controlling the movements of said multiple terminal strips is installed in said actuator.
A key switch apparatus for use in electronic musical instruments in which multi-stage bus bars are allowed to contact multiple terminal strips by a key-driven actuator so as to produce multiple tones simultaneously, characterized in that the apparatus has:
- a mounting frame having multiple through-holes for bus bars in each stage and being installed under each key;
- an actuator having engaging windows through which multiple terminal strips penetrate and being installed so that it can vertically move in said mounting frame and reach a key in the top of the frame;
- a printed circuit board having terminals for connection to the ends of said multiple terminal strips;
- and an electric circuit that removes signal current corresponding to multiple tones to be produced simultaneously.
Dependencies are inferred from the claim text.