KEVIN ARNOLD MILLER,WOLTER F. BENNING,GREGORY RUSS GODDARD,EVERT ALLE HELFRICH
申请号：
US15536471
公开号：
US20170367802A1
申请日:
2015.12.15
申请国别(地区):
US
年份:
2017
代理人:
摘要：
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).
