JPH0461448U

JPH0461448U -

Info

Publication number: JPH0461448U
Application number: JP10445090U
Authority: JP
Priority date: 1990-10-05
Filing date: 1990-10-05
Publication date: 1992-05-26

Description

[Brief explanation of the drawing]

第１図は実施例に係るポリゴンスキヤナの中空
回転体の要部断面図、第２図は第１図に中空回転
体に外嵌されるロータマグネツトの分解断面図、
第３図は従来例に係るポリゴンスキヤナの要部断
面図である。１……中空回転軸、２……ポリゴンミラー、３
……ミラー押さえ、６ａ，６ｂ，６ｃ……マグネ
ツト、８……スロツト鉄心（ステータヨーク）、
８ｃ……コイル部、９……回転体、１０……固定
軸、１０ａ，１０ｂ……ヘリングボーン溝、１３
……ハウジング、２１，２２……押さえリング（
リング部材）、２２……ロータマグネツト、２２
ａ，２２ｂ……マグネツト、Ａ，Ｂ１，Ｂ２，Ｃ
……接着面。 FIG. 1 is a sectional view of a main part of a hollow rotating body of a polygon scanner according to an embodiment, and FIG. 2 is an exploded sectional view of a rotor magnet fitted onto the hollow rotating body in FIG. 1.
FIG. 3 is a sectional view of a main part of a conventional polygon scanner. 1...Hollow rotating shaft, 2...Polygon mirror, 3
...Mirror holder, 6a, 6b, 6c...Magnet, 8...Slot core (stator yoke),
8c... Coil part, 9... Rotating body, 10... Fixed shaft, 10a, 10b... Herringbone groove, 13
...housing, 21, 22...holding ring (
ring member), 22... rotor magnet, 22
a, 22b...Magnet, A, B1, B2, C
...Adhesive surface.

Claims

[Claims for Utility Model Registration] (1) A housing holding a stator with a coil mounted thereon, a fixed shaft erected from the housing side, a hollow rotating shaft rotatably fitted around the fixed shaft, and a hollow A polygon mirror fixed to the rotating shaft, a rotor magnet fixed to the hollow rotating shaft which pairs with the stator to form one motor, and a rotor magnet fixed to the hollow rotating shaft that rotates the hollow rotating shaft in a non-contact manner in the radical direction and the axial direction. The polygon scanner is equipped with a bearing that supports the rotor magnet, and the rotor magnet is fixed to the hollow rotating shaft by a ring member made of a non-magnetic material, with the upper and lower end surfaces of the rotor magnet being bonded as adhesive surfaces. Polygon scanner. (2) The polygon scanner according to claim 1, wherein the rotor magnet is composed of a bonded Nd-Fe-B magnet, and a plurality of magnets are stacked and bonded in the axial direction. (3) The polygon scanner according to claim 1, wherein the magnetization of the rotor magnet or the slot of the yoke on the stator side is skewed.