JPH02109314U

JPH02109314U -

Info

Publication number: JPH02109314U
Application number: JP1636489U
Authority: JP
Priority date: 1989-02-16
Filing date: 1989-02-16
Publication date: 1990-08-31

Description

[Brief explanation of drawings]

図面は本考案の一実施例が示され、第１図は光
走査装置の軸受装置の要部断面側面図、第２図は
動圧溝を示すスラスト及びラジアル受と回転軸の
側面図、第３図は動圧溝を示すスラスト及びラジ
アル受の底面図、第４図は２つの鏡面の回転多面
鏡の斜視図、第５図は４つの鏡面の回転多面鏡の
斜視図である。２…回転軸、７…回転多面鏡、１ｂ，２ｃ…動
圧溝、ａ，ｂ…スラスト及びラジアル軸受面。 The drawings show one embodiment of the present invention, and FIG. 1 is a cross-sectional side view of the main parts of a bearing device of an optical scanning device, FIG. 2 is a side view of a thrust and radial bearing showing dynamic pressure grooves and a rotating shaft, and FIG. 3 is a bottom view of the thrust and radial receivers showing dynamic pressure grooves, FIG. 4 is a perspective view of a rotating polygon mirror with two mirror surfaces, and FIG. 5 is a perspective view of a rotating polygon mirror with four mirror surfaces. 2... Rotating shaft, 7... Rotating polygon mirror, 1b, 2c... Dynamic pressure grooves, a, b... Thrust and radial bearing surfaces.

Claims

[Scope of utility model registration request]

A bearing device for an optical scanning device, wherein dynamic pressure grooves are formed on a radial bearing surface in the rotation radius direction of a rotating shaft to which a rotating polygon mirror is fixed, and a thrust bearing surface in a direction perpendicular to the rotating shaft, respectively, the thrust bearing surface A bearing device for an optical scanning device, characterized in that the cross-sectional shape in the direction of the rotational axis is a circular arc or an elliptical arc.