Title:
GALVANOMIRROR
Document Type and Number:
Japanese Patent JPH01137226
Kind Code:
A
Abstract:
PURPOSE:To obtain a galvanomirror with high rigidity and without requiring the feed to a movable part by using a disk-like permanent magnet of an Sm-Co compound resin coupling type, for the movable part. CONSTITUTION:Powder obtained by pulverizing an Sm-Co alloy is formed like a disk by mixing and kneading it with a nylon resin and bringing them to extrusion molding, and a movable permanent magnet 102 is formed by performing multipolar magnetization to four splits or more in the peripheral direction. Subsequently, the magnet 102, an iron back yoke 107 and a holder 103 are formed as one body with a reflecting mirror 101 inclined by 45 deg. and the holder and an outer ring of a bearing 105, and the holder and the yoke are stuck. Next, a supporting shaft 106 is engaged to an inner ring of the bearing, and the bearing is inserted and held by a collar of the shaft. On the inside of a base 108, a rotating coil 104 is provided, and a movable ball 109 is inserted and held in the outside periphery by the base and the holder. Thereafter, the neutral is adjusted by moving a neutral holding use permanent magnet 201 and a holding magnetic pole 203, and a rotational angle of the movable part is controlled by controlling a current of coils 204, 205 (not shown in the figure).
Inventors:
HORIKAWA MITSUHIRO
ITO HIROSHI
IDE TSUGIO
YANAGISAWA MICHIO
ITO HIROSHI
IDE TSUGIO
YANAGISAWA MICHIO
Application Number:
JP29646987A
Publication Date:
May 30, 1989
Filing Date:
November 25, 1987
Export Citation:
Assignee:
SEIKO EPSON CORP
International Classes:
G02B26/10; G11B7/09; H02K29/00; (IPC1-7): G02B26/10; G11B7/09; H02K29/00
Attorney, Agent or Firm:
Mogami (1 person outside)