JPH0269311U

JPH0269311U -

Info

Publication number: JPH0269311U
Application number: JP14763688U
Authority: JP
Priority date: 1988-11-11
Filing date: 1988-11-11
Publication date: 1990-05-25

Description

[Brief explanation of the drawing]

第１図および第２図はこの考案に係るポリゴン
ミラーユニツトの一実施例を示す図であり、第１
図はこのポリゴンミラーユニツトの分解斜視図、
第２図は窓カバーを回してビーム窓を開閉する状
態を示す斜視図であり、第３図および第４図はこ
の他の実施例を示す図であり、第３図はこのポリ
ゴンミラーユニツトの分解斜視図、第４図はこの
断面図である。第５図ないし第７図は従来のポリ
ゴンミラーユニツトを示す図であり、第５図はこ
のポリゴンミラーが用いられた記録装置の平面図
、第６図は一従来例を示す分解斜視図、第７図は
他の従来例を示す斜視図である。１……ポリゴンミラー、１ａ……ミラー面、２
……基台、３……ミラーケース、４……取付板、
５……遊挿孔、６……ケース部、７……ビーム窓
、８……係合凹部、９……遮蔽カバー（窓カバー
）、１０……開口部、１１……凸部。 FIGS. 1 and 2 are diagrams showing one embodiment of the polygon mirror unit according to this invention.
The figure is an exploded perspective view of this polygon mirror unit.
FIG. 2 is a perspective view showing how the beam window is opened and closed by turning the window cover, and FIGS. 3 and 4 are views showing other embodiments, and FIG. 3 is a diagram of this polygon mirror unit. The exploded perspective view and FIG. 4 are this sectional view. 5 to 7 are diagrams showing a conventional polygon mirror unit, FIG. 5 is a plan view of a recording apparatus using this polygon mirror, FIG. 6 is an exploded perspective view showing a conventional example, and FIG. FIG. 7 is a perspective view showing another conventional example. 1...Polygon mirror, 1a...Mirror surface, 2
...Base, 3...Mirror case, 4...Mounting plate,
5... Loose insertion hole, 6... Case portion, 7... Beam window, 8... Engaging recess, 9... Shielding cover (window cover), 10... Opening, 11... Convex portion.

Claims

[Scope of utility model registration request]

A polygon mirror that polarizes a light beam incident from a light emitting element and reflects it onto a photoreceptor; a mirror case that covers the polygon mirror and is provided with a beam window for entering and reflecting the light beam; A polygon mirror unit comprising a window cover attached thereto for opening and closing the beam window.