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Actuator, optical scanner and image forming device

A technology of optical scanners and actuators, applied in optics, optical components, electrical recording technology using charge patterns, etc., can solve problems such as difficulty in exerting scanning characteristics, changes in optical path length, and inability to scan reflected light.

Active Publication Date: 2011-10-05
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the rotation center axis of the mirror is shifted, and the desired rotation characteristics cannot be exhibited.
[0006] Moreover, when the actuator of Japanese Patent Document 1 is used as an optical scanner or the like, the optical path length from the light source to the reflector changes due to the deviation of the rotation center axis of the reflector, so that it cannot be positioned at the desired position of the object. Up-scan reflected light reflected by the mirror
That is, it is difficult to exhibit the desired scanning characteristics

Method used

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  • Actuator, optical scanner and image forming device
  • Actuator, optical scanner and image forming device
  • Actuator, optical scanner and image forming device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0058] First, the first embodiment of the actuator of the present invention will be described.

[0059] figure 1 It is a perspective view showing the first embodiment of the actuator of the present invention, figure 2 yes figure 1 A cross-sectional view of the A-A line in, image 3 is applied as figure 1 A schematic diagram of an example of a voltage waveform of a piezoelectric element included in the actuator shown. In addition, below, for the convenience of explanation, the figure 1 The outer side of the paper in is called "upper", the inner side of the paper is called "lower", the right side is called "right", the left side is called "left", and, figure 2 The upper side is called "upper", the lower side is called "lower", the right side is called "right", and the left side is called "left".

[0060] The actuator 1 includes: a substrate 2, with such as figure 1 A two-degree-of-freedom vibration system shown;

[0061] Such as figure 1 As shown, the base body 2 has ...

no. 2 example

[0121] Next, a second embodiment of the actuator of the present invention will be described.

[0122] Figure 4 It is a plan view showing the second embodiment of the actuator of the present invention, Figure 5 yes Figure 4 Sectional view of line B-B in . In addition, for the sake of illustration, the Figure 5 The upper side in is called "upper", and the lower side is called "lower".

[0123] In the following, description will be made centering on the differences between the actuator 1A of the second embodiment and the actuator 1 of the first embodiment described above, and descriptions of overlapping parts will be omitted.

[0124]The actuator 1A according to the second embodiment of the present invention is substantially the same as the actuator 1 of the first embodiment except that the shapes of the piezoelectric elements 51A to 54A are different. Also, the same reference numerals are attached to the same structures as those of the first embodiment described above. ...

no. 3 example

[0132] Next, a third embodiment of the actuator of the present invention will be described.

[0133] Figure 6 It is a plan view showing the third embodiment of the actuator of the present invention, Figure 7 yes Figure 6 The profile of the C-C line in, Figure 8 is a diagram for explaining piezoelectric elements, Figure 9 It is a schematic diagram showing an example of the voltage applied to the piezoelectric element. In addition, for the sake of illustration, the Figure 7 The upper side in is called "upper", and the lower side is called "lower".

[0134] In the following, description will be made centering on differences between the actuator 1B of the third embodiment and the actuator 1 of the first embodiment described above, and descriptions of overlapping parts will be omitted.

[0135] The actuator 1B according to the third embodiment of the present invention is substantially the same as the actuator 1 of the first embodiment except for the structure and arrang...

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PUM

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Abstract

An actuator, includes: a movable plate; a supporter to support the movable plate; a pair of linking portions to link the movable plate and the supporter so as to allow the movable plate to rotate relative to the supporter; and a piezoelectric element to rotate the movable plate. The piezoelectric element elongated and contracted by an energization twists the pair of linking portions to rotate themovable plate, and each of the pair of the linking portions includes an axial member extending from the movable plate and a returned portion that links the axial member and the supporter and is formed so as to return to a side adjacent to the movable plate.

Description

technical field [0001] The invention relates to an actuator, an optical scanner and an image forming device. Background technique [0002] For example, in a laser printer or the like, an optical scanner using an actuator including a torsional vibrator is known as an optical scanner for forming an image by optical scanning (for example, refer to Japanese Patent Document 1). [0003] In Japanese Patent Document 1, an actuator is disclosed, which includes: a reflector; a fixed frame portion for supporting the reflector; and a pair of spring portions connecting the reflector to the fixed frame portion at both sides. Moreover, each of the above-mentioned spring parts includes: a connecting body, which is arranged at a distance from the reflector; a first spring part, which connects the reflector and the connecting body; Connection body and fixed frame part. [0004] The above-mentioned actuator heats up due to, for example, ambient temperature and light emitted to the reflector...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B26/10B41J2/47G03G15/00
Inventor 中村友亮沟口安志
Owner SEIKO EPSON CORP