Title:
BRUSHLESS MOTOR AND HANDPIECE
Document Type and Number:
WIPO Patent Application WO/2022/176688
Kind Code:
A1
Abstract:
[Problem] To provide a brushless motor that suppresses heat generation by restraining eddy currents during high-speed rotation, and that can also continuously rotate stably at high speeds, and to provide a handpiece that incorporates the brushless motor. [Solution] In a rotor 10, a yoke 13 has a hollow cylindrical shape which has a larger inner diameter than the outer diameter of a cylindrical portion of a magnet 11, and a holder 14 holds the magnet 11 and the yoke 13 coaxially. In a stator 20, a sleeve 22 has a hollow cylindrical shape in which the inner and outer diameter are larger than the outer diameter of the cylindrical portion of the magnet 11 and smaller than the inner diameter of the cylindrical portion of the yoke 13, and the sleeve 22 holds three coils 21 at equal intervals. In addition, the coils 21 are configured to be positioned in a space between the outer surface of the cylindrical portion of the magnet 11 and the inner surface of the cylindrical portion of the yoke 13.
Inventors:
SEINO HIDEAKI (JP)
ODAGIRI KINYA (JP)
KASAI DAISUKE (JP)
ODAGIRI KINYA (JP)
KASAI DAISUKE (JP)
Application Number:
PCT/JP2022/004802
Publication Date:
August 25, 2022
Filing Date:
February 08, 2022
Export Citation:
Assignee:
ADAMANT NAMIKI PREC JEWEL CO LTD (JP)
International Classes:
H02K21/14; H02K7/04
Foreign References:
| JP2001086721A | 2001-03-30 | |||
| JP2020148143A | 2020-09-17 | |||
| JPH08126265A | 1996-05-17 | |||
| JP2008072871A | 2008-03-27 | |||
| JP2018504087A | 2018-02-08 |
Download PDF:
Previous Patent: SEMICONDUCTOR DEVICE, JOINING METHOD, AND JOINING SYSTEM
Next Patent: COMPOSITE WAFER AND METHOD FOR PRODUCING SAME
Next Patent: COMPOSITE WAFER AND METHOD FOR PRODUCING SAME