JPH0373995U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is an external view of one embodiment of the present invention;
The figure is a diagram showing the configuration of a photodetection circuit arranged corresponding to the finger hole, Figure 3 is a system configuration diagram of an electronic wind instrument which is an embodiment of the present invention, and Figure 4 is a diagram showing the configuration of an electronic wind instrument according to the above embodiment FIG. 5 is a diagram for explaining the method of specifying pitch by fingering operation, FIG. 5 is a diagram for explaining the operation of the above embodiment, and FIG. 6 is a side view showing the configuration of an electronic musical instrument using a conventional photodetector. It is. , 30...Blowout section, 31...Breath sensor,
41-1 to 41-8...finger hole, 111...infrared light emitting diode, 112...shading plate, 113...
Light receiving diode, 114, 115...Condensing lens, 116...Protection plate (infrared passing filter), 1
17...AC power supply, 120...amplifier, 130...
...BPF (band pass filter), 220...C
PU (microprocessor), 230...musical tone generation circuit, 240...voltage detection circuit, 250...A
/D converter, 260... musical tone output section.

Claims (1)

[Claims for Utility Model Registration] 1. Light emitting means for outputting light having an arbitrary wavelength as an optical signal of a predetermined frequency; and receiving the optical signal of the predetermined frequency output from the light emitting means, and a light receiving means that outputs an electrical signal having the same frequency as the frequency of the optical signal; a bandpass filter having a center frequency equal to the frequency of the electrical signal and into which the electrical signal outputted from the light receiving means is input; and the bandpass filter. a fingering operation detection means for detecting the presence or absence of a fingering operation for each fingering operation position based on an electrical signal output from the filter; A fingering position detection device comprising: pitch data output means for outputting pitch data related to the pitch of a musical tone corresponding to a finger operation position. 2. The light emitting means and the light receiving means are provided in a plurality of recesses formed in the main body, and are paired as a pair.
2. The fingering position detection device according to claim 1, further comprising a reflective interrupter that detects a change in reflected light emitted from said light emitting means. 3. The operation according to claim 1, wherein the light-emitting means and the light-receiving means are provided as a pair at positions facing each other, and constitute a transmission type interrupter for detecting an object that obstructs the space between the light-emitting means and the light-receiving means facing each other. Finger position detection device. 4. The fingering position detection device according to claim 1, 2 or 3, and a musical tone generating means for generating a musical tone with a pitch corresponding to the pitch data output from the fingering position detection device. Characteristic electronic musical instruments. 5. The fingering position detection device according to claim 1 or 2; a breath operation sensing means for outputting a breath sense signal corresponding to the strength of breath blown into the mouthpiece; and a breath sense signal outputted from the breath operation sensing means. 1. An electronic musical instrument comprising: musical tone generating means for generating a musical tone having a pitch corresponding to the pitch data output from the fingering position detection device based on a breath sense signal generated by the fingering position detecting device.