VOICE COIL MOTOR AND FOCUSING LENS - BOLYMEDIA HOLDINGS CO LTD

Title:

VOICE COIL MOTOR AND FOCUSING LENS

Document Type and Number:

WIPO Patent Application WO/2015/157909

Kind Code:

A1

Abstract:

A voice coil motor and a corresponding focusing lens. A rotor assembly (22) is connected to a stator assembly (21) by means of an elastic connecting piece (23). A stator sleeve (211) is sleeved on a rotor sleeve (221). One of the stator sleeve (211) and the rotor sleeve (221) 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 (222) and a drive coil (223). The pre-magnetic element (222) is made of a permanent magnetic or magnetized material, and is fixed relative to the non-magnetic material sleeve. The elastic connecting piece (23) is in a force balance state in a case without power because of pre-existing magnetic force between the pre-magnetic element (222) and the permanent magnetic material sleeve. Smaller electromagnetic force is required for driving the elastic connecting piece (23) to move, thereby reducing a drive current and power consumption.

More Like This:

WO/2010/123920	VARIABLE-FOCAL-LENGTH FLUIDIC LENS WITH REDUCED OPTICAL ABERRATION
JPH09236749	ZOOM LENS SYSTEM
JPH0875979	OPTICAL DEVICE

Inventors:

HU XIAOPING (CN)

Application Number:

PCT/CN2014/075377

Publication Date:

October 22, 2015

Filing Date:

April 15, 2014

Export Citation:

Click for automatic bibliography generation Help

Assignee:

BOLYMEDIA HOLDINGS CO LTD (US)
HU XIAOPING (CN)

International Classes:

G02B7/04; H02K33/18

Foreign References:

CN1992483A	2007-07-04
CN102043225A	2011-05-04
CN201063067Y	2008-05-21
CN101738702A	2010-06-16
TWM325524U	2008-01-11
US20070166022A1	2007-07-19
US20110235195A1	2011-09-29

Other References: