Johnson Electric S.a.

Guoji Zhang

Yue Li

Jian Zhao

Lisheng Liu

Hongjian Zhang

A coreless permanent motor has a stator and a rotor rotatably mounted to the stator. One of the stator or the rotor has at least one winding disc (). The other one of the stator or the rotor has at least one surface charged magnet disc (). The winding disc () or the magnet disc () is formed by two or more sector shaped units that are mounted to two or more support members () respectively. The winding disc () or the magnet disc () is formed by closing the support member () and the closed support members () form a cylindrical housing. Thus, the structure of the coreless motor is simplified.

Coreless permanent magnet motor with surface charged magnet

A lens module comprises an optical lens component having an optical axis, an image sensing component located adjacent the optical lens component, and a dust trap located between the optical lens component and the image sensing component. The optical lens component has with a lens mount and a lens barrel mounted in the lens mount by way of a threaded connection. The dust trap comprises body having a groove which locates behind the connection between the lens mount and the lens barrel, for receiving dust dropping from the connection, and an inner extension arm separating the groove from the image sensing component for preventing the dust in the groove from moving onto the image sensing component which could reduce the quality of the image.

Lens module

A lens driving device has a stationary part including an iron shell, a movable part including a lens holder for holding a lens therein, and a driving part for moving the movable part relative to the stationary part. The driving part includes a plurality of magnets fixed to the iron shell, and at least one coil fixed to the lens holder. The magnets are divided into at least two layers stacked in the direction of the optical axis of the lens and a plurality of groups along the circumferential direction of the lens. Each magnet is polarized in the radial direction of the lens. The polarities of two adjacent stacked magnetic poles in the same group are opposite to each other so as to cooperatively form a magnetic circuit in a plane parallel to the optical axis direction. The coil includes an axis about which the coil is wound. The coil axis is perpendicular to the optical axis. The coil has an upper part facing one layer of magnets and a lower part facing the other layer of magnets.

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Shenzhen, China

Guoji Zhang