The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 08, 2017
Filed:
Apr. 15, 2014
Bolymedia Holdings Co. Ltd., Santa Clara, CA (US);
Xiaoping Hu, Shenzhen, CN;
BOLYMEDIA HOLDINGS CO. LTD., Santa Clara, CA (US);
Abstract
A voice coil motor and a corresponding focusing lens. A rotor assembly () is connected to a stator assembly () by means of an elastic connecting piece (). A stator sleeve () is sleeved on a rotor sleeve (). One of the stator sleeve () and the rotor sleeve () is a permanent magnetic material sleeve, and the other is a non-magnetic material sleeve. An assembly to which the non-magnetic material sleeve belongs also comprises a pre-magnetic element () and a drive coil (). The premagnetic element () is made of a permanent magnetic or magnetized material, and is fixed relative to the non-magnetic material sleeve. The elastic connecting piece () is in a force balance state in a case without power because of pre-existing magnetic force between the pre-magnetic element () and the permanent magnetic material sleeve. Smaller electromagnetic force is required for driving the elastic connecting piece () to move, thereby reducing a drive current and power consumption.