JPS61203721U

JPS61203721U -

Info

Publication number: JPS61203721U
Application number: JP8577485U
Authority: JP
Priority date: 1985-06-08
Filing date: 1985-06-08
Publication date: 1986-12-22

Description

[Brief explanation of the drawing]

第１図ないし第５図はこの考案のポリゴンミラ
ーの一実施例を示す図で、第１図はポリゴンミラ
ーの平面図、第２図は第１図の―線に沿う断
面図、第３図は射出成形金型のコアを示す断面図
、第４図は射出成形金型を示す断面図、第５図は
貫通孔と駆動モータの回転軸との嵌合状態を示す
断面図、第６図ないし第１０図は従来例を示す図
で、第６図は第１図に相当する平面図、第７図は
第２図に相当する断面図、第８図は第３図に相当
する断面図、第９図は第４図に相当する断面図、
第１０図は第５図に相当する断面図である。１１…ポリゴンミラー、１２…鏡面、１３…貫
通孔、１４…内周壁、１５…凹部、２１…ゲート
、Ｓ…回転軸。 1 to 5 are views showing an embodiment of the polygon mirror of this invention, in which FIG. 1 is a plan view of the polygon mirror, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIG. 4 is a sectional view showing the core of the injection mold, FIG. 4 is a sectional view showing the injection mold, FIG. 5 is a sectional view showing the fitted state of the through hole and the rotating shaft of the drive motor, and FIG. 10 to 10 are diagrams showing conventional examples, FIG. 6 is a plan view corresponding to FIG. 1, FIG. 7 is a sectional view corresponding to FIG. 2, and FIG. 8 is a sectional view corresponding to FIG. 3. , FIG. 9 is a cross-sectional view corresponding to FIG. 4,
FIG. 10 is a sectional view corresponding to FIG. 5. DESCRIPTION OF SYMBOLS 11... Polygon mirror, 12... Mirror surface, 13... Through hole, 14... Inner peripheral wall, 15... Recessed part, 21... Gate, S... Rotation shaft.

Claims

[Claims for Utility Model Registration] A polygon mirror in which a plurality of mirror surfaces are formed on the outer periphery by injection molding, and a through hole into which a rotation shaft of a drive motor is inserted is formed in the center, comprising: A polygon mirror characterized in that a concave portion is formed on the inner peripheral wall to which a gate is connected during injection molding.