Personal care device actuator with rattle mitigation
US10537414B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 2015 |
| Grant date | Jan 21, 2020 |
| Priority date | — |
| Expiry date | Jun 17, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/083
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An actuator (12) for a personal care appliance (10) having an eccentric core (21) to preload the actuator (12) to prevent rattling caused by detrimental reactionary forces. The eccentric core (21) includes a pole assembly (24) radially extending from a spindle (22) having at least a first set (25-1) and a second set (25-2) of pole members. The first set (25-1) has a greater length as measured from the center of the spindle (22) than the second set (24-2), reducing the magnet gap on one side of the spindle (22) to create an eccentric core and preload the actuator (12). Alternatively, the preload can be mechanically created by a set of bearings (28) disposed within housing (18) of the actuator (12), where the bearings (28) have a centerline (A3) offset from the principal axis (A1) of the housing (18).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.