Linear vibration motor
US10819202B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 19, 2019 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Jun 20, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear vibration motor includes: a casing having an upper casing whose bottom is open and a lower casing coupled to the upper casing to form an internal space therein; a stator disposed on top of the lower casing in the internal space formed by the casing; an elastic member disposed around the stator in the internal space formed by the casing in such a manner as to allow one surface thereof to be coupled to the lower casing; an oscillator mounted on the other surface of the elastic member and having a ring-shaped magnet disposed around the stator; and a magnetic fluid applied to top of the ring-shaped magnet, wherein the upper casing includes a ring-shaped protrusion formed on the inner surface facing the lower casing, and an inner diameter of the ring-shaped protrusion is greater than an outer diameter of the ring-shaped magnet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.