Vibrating device and image equipment having the same

An image equipment comprising:

• an image forming element having an image surface on which an optical image is formed;
• a vibrator including:
• a dust-screening member which is shaped like a plate as a whole, has at least one side that is symmetric with respect to a symmetry axis, and has a light-transmitting region at least spreading to a predetermined region, facing the image surface and spaced therefrom by a predetermined distance;
• and a vibrating member configured to produce vibration having an amplitude perpendicular to a surface of the dust-screening member, the vibrating member being provided on the dust-screening member, outside the light-transmitting region through which a light beam forming an optical image on the image surface passes;
• a sealing structure for surrounding the image forming element and the dust-screening member, thereby providing a closed space in which the image forming element and the dust-screening member that face each other;
• and
• a hold and support member configured to hold and support the vibrator to the sealing structure, wherein
• the hold and support position by the hold and support member is arranged at position along a circle or ellipse concentric to the centroid of the vibrator such that peak ridges of the vibration having a vibrational amplitude perpendicular to the surface of the dust-screening member form closed loops.