Electromagnetic interference preventing mechanism for micro-lens

Abstract

The invention provides a mechanism for preventing electromagnetic interference of micro-lens, comprising a frame, around which four magnetism modules are arranged; a bearing seat which is used for bearing a micro-lens and externally covered with a coil pack; at least one elastic component, an external fixed part and an internal movable part of which mutually connects four groups of strings with ninety degrees, the external fixed part is connected with the frame, and the internal movable part is connected with the bearing seat, thus forming an elastic movable supporting bearing seat which is suspended at the center of the frame; an upper cover and a lower cover which are respectively arranged above and below the frame and fixedly connects the elastic component on the frame; a metal outer cover which covers the external parts of the upper cover, the elastic component, the bearing seat, the frame and the lower cover, and the bottom of the metal outer cover is provided with at least one conductive contact pin which is electrically connected to the ground, electromagnetic effect generated to the outside is insulated by the grounding mode, and the external electromagnetic interference and the electrostatic protection are also insulated.

Description

technical field [0001] The present invention is a micro-lens electromagnetic interference prevention mechanism, in particular to a micro-focus lens that uses electromagnetic drive to drive the lens to move to achieve the focusing function, and a mechanism for preventing electromagnetic interference (EMI, EMC and ESD). Background technique [0002] Due to the advancement of technology, the volume of digital cameras has been reduced quite small, and the current mobile phones are also equipped with digital camera functions, which are due to the modularization and miniaturization of camera lenses, and in the miniature lenses There are many types of autofocus drive structures, and the most commonly used one is the voice coil motor (VCM). Due to its small size, low power consumption, precise actuation displacement, and low price, it is suitable for autofocus in micro lenses. short drive. [0003] Such as figure 1 Shown is an existing lens focusing device 200, which mainly includ...

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Problems solved by technology

[0005] However, in the existing focusing mechanism design, most of the moving lens groups adopt the "manual method", which is more convenient to use. If the focusing method of the lens is changed from manual to electromagnetic drive, the lens can focus automatically, and the mechanism design can be simplified at the same time. , but it will produce the problem of Electromagnetic Interference (EMI), and for current technology products such as mobile phones, notebook computers, PDAs, etc., must comply with Electromagnetic Interference (EMI), Electromagnetic Compatibility (Electro Magnetic Compatibility, EMC) and electrostatic protection (Electro Static Discharge, ESD) and other specifications, so if you use the electromagnetic drive method for focusing, you must solve the problem of compliance with EMI, EMC and ESD specifications

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