Vibrating device and image equipment having the same
First Claim
1. A vibrating device comprising:
- a dust-screening member which is shaped like a plate as a whole and has at least one side that is symmetric with respect to a symmetry axis;
a vibrating member secured to the dust-screening member and configured to produce, at the dust-screening member, vibration having a vibrational amplitude perpendicular to a surface of the dust-screening member; and
a drive unit configured to drive the vibrating member to produce vibration Z(x,y) at the dust-screening member, the vibration being expressed as follows;
Z(x,y)=Wmn(x,y)·
cos(γ
)+Wnm(x,y)·
sin(γ
)where Z(x,y) is vibration at a given point P(x,y) on the dust-screening member;
m and n are positive integers including 0, indicating the order of natural vibration corresponding to a vibrational mode;
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Accused Products
Abstract
A vibrating device includes a drive unit configured to drive a vibrating member to produce vibration Z(x,y) at a dust-screening member, the vibration being expressed as follows:
Z(x,y)=Wmn(x,y)·cos(γ)+Wnm(x,y)·sin(γ)
where Z(x,y) is vibration at a given point P(x,y) on the dust-screening member, m and n are positive integers including 0, indicating the order of natural vibration corresponding to a vibrational mode,
γ is +π/4 or ranges from −π/8 to −π/4. LP/LF is 0.5 or more, but less than 1, where LF is the length of the sides to which the vibrating member is arranged in a virtual rectangle having the same area as the surface of the dust-screening member and sides including the one side, and LB is the longitudinal length of the vibrating member of the sides parallel to the one side.
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Citations
18 Claims
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1. A vibrating device comprising:
- a dust-screening member which is shaped like a plate as a whole and has at least one side that is symmetric with respect to a symmetry axis;
a vibrating member secured to the dust-screening member and configured to produce, at the dust-screening member, vibration having a vibrational amplitude perpendicular to a surface of the dust-screening member; and
a drive unit configured to drive the vibrating member to produce vibration Z(x,y) at the dust-screening member, the vibration being expressed as follows;
Z(x,y)=Wmn(x,y)·
cos(γ
)+Wnm(x,y)·
sin(γ
)where Z(x,y) is vibration at a given point P(x,y) on the dust-screening member;
m and n are positive integers including 0, indicating the order of natural vibration corresponding to a vibrational mode; - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- a dust-screening member which is shaped like a plate as a whole and has at least one side that is symmetric with respect to a symmetry axis;
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9. An image equipment comprising:
- an image forming element having an image surface on which an optical image is formed;
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 flaring in a radial direction from the center, facing the image surface and spaced therefrom by a predetermined distance;
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 drive unit configured to drive the vibrating member to produce vibration Z(x,y) at the dust-screening member, the vibration being expressed as follows;
Z(x,y)=Wmn(x,y)·
cos(γ
)+Wnm(x,y)·
sin(γ
)where Z(x,y) is vibration at a given point P(x,y) on the dust-screening member;
m and n are positive integers including 0, indicating the order of natural vibration corresponding to a vibrational mode; - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
- an image forming element having an image surface on which an optical image is formed;
Specification