| 摘要 |
A charging device is provided. A needle-like electrode for charging the surface of a photoreceptor drum is formed with a vibrating portion for vibrating the needle-like electrode by the vibration. The vibrating portion is a piezoelectric bimorph element in which two piezoelectric elements are bonded together and a base portion is formed therebetween. When a voltage is applied to the piezoelectric bimorph element, a free end thereof is curved to vibrate.
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