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Polygon mirror scanner motor

A multi-surface reflection, volume scanning technology, applied to synchronous motors with stationary armatures and rotating magnets, electric components, electrical components, etc., can solve problems such as cracks, and achieve the effect of stabilizing the reference plane

Inactive Publication Date: 2010-08-18
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, since the rotor is made of plastic magnets, cracks may occur due to the centrifugal force acting on the rotor during high-speed rotation.

Method used

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  • Polygon mirror scanner motor
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  • Polygon mirror scanner motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0067] figure 1 It is a cross-sectional view of a polygon reflector scanning motor according to an embodiment of the present invention. in addition, figure 2 It is a perspective view of a rotor frame of a polygon reflector scanning motor according to an embodiment of the present invention.

[0068] Such as figure 1 As shown, in this polygonal reflector scanning motor, a stator core 18 a around which a stator coil 18 b is wound is mounted on a base substrate 19 , and a fixed shaft 17 is fixed to the base substrate 19 . In addition, the fixed shaft 17 rotatably supports the bearing sleeve 14 to which the rotor frame 12 is connected. That is, the bearing sleeve 14 has a substantially cylindrical shape having an opening at one end, and the fixed shaft 17 is inserted into the inner peripheral side of the bearing sleeve 14 through the opening. In addition, a resin thrust plate 15 constituting the bearing thrust portion 16 is disposed on the other end side of the inner periphe...

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PUM

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Abstract

A polygon mirror scanner motor comprises a rotor frame (12) in which rotor magnets (13) are cylindrically arranged, a bearing sleeve (14) fastened to the center of the rotor frame (12), a fixed shaft (17) having one end secured to a base board (19) and the other end for rotatably supporting the bearing sleeve (14), and a polygon mirror (11) placed on the rotor frame (12). The rotor frame (12) has at least three projections (12a) on its one surface, and the polygon mirror (11) is so placed on the frame as to be contacted with projections (12a).

Description

technical field [0001] The present invention relates to a polygonal reflector scanning motor used for laser scanning in laser printers, laser copiers, etc., and more particularly to a polygonal reflector scanning motor with high-speed rotation and high-speed starting, miniaturization, and long life. Background technique [0002] In recent years, polygonal reflector scanning motors (hereinafter abbreviated as "polygonal reflector motors" as appropriate) have been required to be smaller, thinner, and lower in cost along with the spread of LBP (Laser Beam Printer). Likewise, it is necessary to maintain high-precision performance against rotational fluctuations and noise, or the surface inclination of the polygonal reflector. Among them, by fixing the bearing part on an iron base plate or the like and pivotally supporting the rotating shaft on the bearing part, thinness and cost reduction are achieved, and fluid bearings are used as bearings to achieve high precision and long li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B26/12
CPCG02B7/1821G02B26/121H02K5/1677H02K21/22
Inventor 角正贵前谷昭光福井康嗣
Owner PANASONIC CORP