Title:
MOTOR, MIRROR ROTATION DEVICE, AND DISK DRIVING DEVICE
Document Type and Number:
Japanese Patent JP2020156121
Kind Code:
A
Abstract:
To provide a structure capable of highly accurately and easily detecting rotation of a rotation part while reducing the number of components in a motor for rotating an annular member such as a polygon mirror.SOLUTION: A rotation part 3 includes a rotor hub 32, an annular member 12, and a clamp 34. The rotor hub is at least partially located outside a stator 22 in a radial direction, has a first magnet 33 mounted thereon oppositely to the stator, and annularly expands around a center axis. The annular member is supported on the outer peripheral part of the rotor hub. The clamp is directly or indirectly fixed to the rotor hub inside the annular member in the radial direction, and presses the annular member downward in an axial direction. The rotor hub includes a flange 324 which expands outside from at least a part excluding the upper end in the radial direction. A detection pattern 53 disposed in a peripheral direction so as to detect rotation of the rotation part is provided to the surface of the clamp. The annular member is held between the flange and the clamp in the axial direction.SELECTED DRAWING: Figure 2
Inventors:
HACHIMAN ATSUSHI
Application Number:
JP2019049263A
Publication Date:
September 24, 2020
Filing Date:
March 18, 2019
Export Citation:
Assignee:
NIHON DENSAN KK
International Classes:
H02K11/215; G11B19/20; G11B33/12; H02K11/22
Domestic Patent References:
| JP2007122768A | 2007-05-17 | |||
| JPH0461447U | 1992-05-26 | |||
| JP2002170316A | 2002-06-14 | |||
| JP3060766U | 1999-09-07 | |||
| JP2005241644A | 2005-09-08 | |||
| JP2014092269A | 2014-05-19 | |||
| JP2002084708A | 2002-03-22 | |||
| JP2006058640A | 2006-03-02 |
Attorney, Agent or Firm:
Takami Nishida