Konica Corporation

Konica Minolta Business Technologies, Inc.

Takaaki Kurosawa

Hiroshi Kobayashi

Susumu Matsui

Naohiro Ono

Ryuji Kamata

Naohiro Ohno

A light deflection apparatus, including a stator section including a radial bearing having a first dynamic pressure generating groove, a thrust bearing having a second dynamic pressure generating groove, and a stator coil; and, a rotor section including a polygon minor, a magnet facing the stator coil, and a rotating body having a dynamic pressure surface facing the radial bearing and a dynamic pressure surface facing the thrust bearing, the rotor supporting the polygon minor and the magnet; wherein one end portion of the dynamic pressure bearing section included of the thrust bearing, the radial bearing and of the rotating body in the thrust direction is closed excluding a gap between the dynamic pressure bearing section of the radial bearing and the dynamic pressure bearing section of the rotating body.

Light deflection apparatus

An optical deflection device includes a rotor unit having a rotary polygon mirror and a magnet, a dynamic pressure bearing having a rotary bearing member rotatably supporting the rotor unit and a stationary bearing member, and a stator unit having a base member for supporting the stationary bearing member and a magnet coil for driving the rotary unit in cooperation with the magnet. The optical deflection device further includes a stabilizing member for rectifying and stabilizing airflow caused by the rotation of the rotary polygon mirror, which is mounted on the top of the base member in such a way that the stabilizing member is located close to the mirror surface on the outer periphery of the rotary polygon mirror.

Optical deflection device and optical scanning apparatus equipped therewith

The invention concerns a light deflection device, and a control method for the light deflection device, which are rich in expandability of drive control. The light deflection device includes a polygon mirror to reflect the light beam; a rotor, having a magnet, to rotate the polygon mirror attached to the rotor; a stator on which a plurality of drive coils are fixed so as to generate a rotational force; and a plurality of connecting ports through which the plurality of drive coils are electronically coupled to a plurality of drive circuits, each of which drives the drive coils while controlling the rotational force to be generated between the magnet and drive coils. One of the drive circuits controls the rotational force during a start-up operation and a steady-rotating operation of the rotor, while another one controls the rotational force during a decelerating operation of the rotor.

Control method for light deflection device

The invention concerns a light deflection device, and a control method for the light deflection device, which are rich in expandability of drive control. The light deflection device includes a polygon mirror to reflect the light beam; a rotor, having a magnet, to rotate the polygon mirror attached to the rotor; a stator on which a plurality of drive coils are fixed so as to generate a rotational force; and a plurality of connecting ports through which the plurality of drive coils are electronically coupled to a plurality of drive circuits, each of which drives the drive coils while controlling the rotational force to be generated between the magnet and the drive coils. One of the drive circuits controls the rotational force during a start-up operation and a steady-rotating operation of the rotor, while another one controls the rotational force during a decelerating operation of the rotor.

Brushless motor, control method for brushless motor, light deflection device, and control method for light deflection device

An optical deflection device having a rotary body that is fixed on a bearing and is structured rotatably by a magnet arranged to face a coil provided on a base side, wherein the rotary body is made of a magnet and a polygon mirror is fixed on the rotary body.

Optical deflection device and image forming apparatus equipped therewith

An optical deflection device includes: a fixed supporting member; a coil supporting member fixed on the fixed supporting member; a coil fixed on the coil supporting member; a rotary body having a rotary polygon mirror, a magnet facing and apart from the coil and a rotary supporting member for supporting the rotary polygon mirror and the magnet; a bearing unit supported on the fixed supporting member for rotatably supporting the rotary body; and a buffer member interposed between the fixed supporting member and the coil supporting member.

Growing community of inventors

Tokyo, Japan

Takaaki Kurosawa