JPH0289499U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a circuit diagram of an embodiment of the present invention, Fig. 2 is a plan view of the main parts of the same embodiment, Fig. 3 is a cross-sectional view of the main parts, and Fig. 4 is an explanatory diagram of the conventional example. It is. 1...First oscillator, 2...Second oscillator, 3
...Synthesizer, 4...Amplifier, 5...Speaker (
(sonic wave generator), 6...power battery, 7...power switch, 8...box, 9...piezoelectric element, 10...diaphragm, 11...vibration absorbing means.

Claims (1)

[Scope of utility model registration request] The first oscillator oscillates an electrical signal of approximately the same frequency as the whistle.
an oscillator, a second oscillator for modulation to produce the tone of the whistle, and electronically synthesize the oscillation frequencies of the first oscillator and the second oscillator to generate the pseudo whistle sound as a signal. A synthesizer that generates a synthesizer, an amplifier that amplifies the signal obtained by this synthesizer, a sound wave generator that converts the amplified signal into a sound wave, a power battery that supplies power to these devices, and a power source that turns on the power. - An electronic whistle consisting of an electronic circuit consisting of a power switch that turns off, and housed in a box, wherein the sound wave generator consists of a piezoelectric element and a diaphragm with the piezoelectric element attached to the center, An electronic whistle characterized in that the diaphragm has an outer circumference attached to the box, and the diaphragm is provided with wave-like vibration absorbing means near the outer periphery.