Vibration motor including back yoke with protrusion portions
US10610891B2 · kind B2 · utility
0Cited by
4References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2017 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Jan 20, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K33/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A back yoke of a vibration motor has a rectangular top surface portion, a long side protrusion portion that protrudes downward from a long side portion of the top surface portion, and a short side protrusion portion that protrudes downward from a short side portion of the top surface portion. The short side protrusion portion has a protrusion amount smaller than that of the long side protrusion portion. A portion of a lead wire extending from the short side of a coil is disposed below the short side protrusion portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.