Brushless direct current vibrational motor
US10033245B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 2, 2015 |
| Grant date | Jul 24, 2018 |
| Priority date | — |
| Expiry date | Jan 7, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A BLDC vibrational motor is provided, which is improved so as to generate a larger vibrational force per same volume compared to prior arts. A cylindrical bearing is fixed to a doughnut-shaped permanent magnet directly so that the magnet can be disposed as close as possible to the center of rotation, and thus coils can have a reduced volume and be disposed as close as possible to the center of rotation. The external space of the coils can be secured larger as much as the movement of position of the coils, and the weight takes up the space for rotation, so that volume of the weight can be enlarged. Thus, the weight can be extended and disposed to the external space of the coils, it is possible for a vibration motor with a small volume to generate a large vibrational force, which facilitates slim designs of the vibrational motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.