Motor for a personal skin care appliance
US8469909B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2009 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Jan 2, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K2213/03
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The motor includes a rigid anchor member which is fixedly mounted to the applicator housing, an electromagnetic stator member and an armature. The armature includes a permanent magnet assembly and two leaf springs which connect the anchor member and the armature, the leaf springs being positioned at right angles to each other. The ratio of the lengths of the spring members is within the range of 0.75:1 to 0.95:1. A driving assembly produces an alternating current drive signal to the stator member which moves the armature and a skin contact member attached thereto in a reciprocating motion which includes a first component perpendicular to the skin, a second component parallel to the skin and a third arcuate component.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.