| 摘要 |
PURPOSE:To provide a noise sensor for a copying machine in which noise improvement is given centering on a driving motor, one of large noise sources. CONSTITUTION:A vibration pickup 4 is mounted on a driving motor 3, which is one of large noise sources attached in a copying machine body 1, a noise- erasing space surrounding body 5 is formed which covers circumference of the driving motor 3 including this vibration pickup 4 and has a noise-erasing space for sealing noise generated by this driving motor 3. And a noise-erasing speaker 10 for generating a sound in the waveform opposite to the noise waveform of the driving motor 3 is arranged in the noise-erasing space A of this noise-erasing space surrounding body 5 and the circumference of the driving motor 3 is covered by the noise-erasing space surrounding body 5 so as to form the noise-erasing space A for sealing the noise generated by the driving motor 3. And the noise generated by the driving motor 3 is effectively erased by generating the sound in the waveform opposite to the noise waveform of the driving motor 3 in this noise-erasing space A from the noise-erasing speaker 10. |
