Vibration motor with base portion including first and second plate portions
US10363575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 1, 2017 |
| Grant date | Jul 30, 2019 |
| Priority date | — |
| Expiry date | Oct 6, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/09
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A base portion of a vibration motor includes a first plate including a first plate recessed portion in an upper surface thereof; and a second plate arranged in the first plate recessed portion, and fixed to the first plate. One of the first and second plates is made of a magnetic metal, while another one is made of a nonmagnetic metal. An upper surface of the second plate is arranged at the same level as that of a portion of the upper surface of the first plate which lies adjacent to and along the first plate recessed portion. The second plate includes an annular second plate support portion centered on a central axis; and a plurality of second plate projecting portions arranged to project radially inward or radially outward from the second plate support portion, and arranged in a circumferential direction at a position vertically opposed to a magnet portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.