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发明授权
CN101771821B 振动装置及使用该振动装置的图像设备 有权 转让

振动装置及使用该振动装置的图像设备
摘要：
本发明提供振动装置及使用该振动装置的图像设备。作为防尘部件的防尘滤波器(119)整体形成为板状，具有至少一条与某个对称轴对称的边，压电元件(120a)设在防尘滤波器(119)上，使得产生具有与所述防尘滤波器的部件表面垂直的振动振幅的振动，该压电元件(120a)被驱动成，在把所述防尘滤波器上的任意的点P(x，y)的振动设为Z(x，y)、把m和n设为与振动模式对应的固有振动的次数且是包含0的正整数时，产生利用下式表示的振动Z(x，y)：Z(x，y)＝Wmn(x，y)·cos(γ)+Wnm(x，y)·sin(γ)(其中，Wmn(x，y)＝sin(nπ·x+π/2)·sin(mπ·y+π/2)，Wnm(x，y)＝sin(mπ·x+π/2)·sin(nπ·y+π/2)、γ＝+π/4或者γ＝-π/8～-π/4)。该振动装置具有与防尘部件的部件表面的面积相同的面积，具有在把具有包含该防尘部件的所述一边的边的假想矩形(175)中、配置有所述压电元件的边的长度设为LF，把与该边平行的所述施振部件的长度方向的长度设为LP时，LP/LF为0.5以上且小于1的尺寸。
摘要（英）：

The invention provides a vibrating device and image equipment having the same. A piezoelectric element (120a) is secured to a dust filter (119) as 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, the piezoelectric element being driven to produce vibration Z (x, y) at the dust filter, the vibration being expressed as follows: Z(x, y)= Wmn(x, y)cos(Gamma)+ Wnm(x, y).sin(Gamma) where Z (x, y) is vibration at a given point P (x, y) on the dust filter, m and n are positive integers including 0, indicating the order of natural vibration corresponding to a vibrational mode, Wmn(x, y) = sin(nPi.x + Pi/2) sin(mPi.y+Pi/2) , Wnm(x, y)=sin(mPi.x + Pi/2).sin(nPi.y+Pi/2), and Gamma is +Pi/4 or ranges from -Pi/8 to -Pi/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 (175) 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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