Operated position detecting apparatus and electronic musical instruments provided therewith

DETAILED DESCRIPTION Accordingly, it is an object of this invention to provide an operated position detecting apparatus which can be produced at a low cost without requiring that a diode for preventing a current from flowing to undesirable components be provided for each switch element.
It is another object of this invention to provide an electronic musical instrument which can be produced at a low cost without requiring a number of pitch-setting switches in a fingerboard.
It is a further object of this invention to provide an electronic musical instrument which can accurately detect the point of contact between each string and each fret with a simple arrangement.
It is a still further object of this invention to provide an electronic musical instrument which can accurately detect the pressed positions of strings using ordinary steel strings that are used in traditional electronic guitars, guitar synthesizers, etc.
It is a still another object of this invention to provide an electronic musical instrument which has a simple circuit structure for those portions around the individual frets to thereby reducing its general cost.
To begin with, the first mode of this invention will be described below.
This mode is premised on an electronic musical instrument which comprises a plurality of frets disposed at predetermined internals therebetween, a plurality of conductive strings stretched over and across the individual frets at predetermined intervals, string pressed position detecting means for responding to an event of any of the strings being pressed and detecting the pressed position of the pressed string, and pitch designating means for designating a pitch of a musical sound to be generated in accordance with the detected position of the pressed string.
According to this mode, each fret has a two-layered structure comprising a conductive member made of a conductive material whose electric resistance is negligible and a resistive member formed at that portion of the conductive member with which each string can come in contact