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voice coil motor

A voice coil motor and coil technology, used in installation, optics, instruments, etc., can solve the problems of loss of magnet thickness and weak electromagnetic force, and achieve the effect of increasing the magnetic field strength and increasing the electromagnetic force.

Inactive Publication Date: 2016-05-11
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The magnets are set at the four corners of the fixed frame. The existence of the lead angle will inevitably affect the space for the fixed frame to accommodate the magnet. Then, the magnet needs to be set in a suitable shape according to the lead angle. Therefore, the thickness of the magnet in the direction of the magnetic pole will be lost. The thickness in the direction of the magnetic pole is an important factor affecting the strength of the magnet, so the electromagnetic force between the magnet and the coil of the movable component is weak

Method used

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Embodiment Construction

[0046] see figure 1 , figure 2 , image 3 as well as Figure 4 , the voice coil motor 20 provided by the embodiment of the present invention is used to drive the movement of the lens module (not shown in the figure) to realize the focusing or zooming function.

[0047] The voice coil motor 20 includes an upper cover 21, a lower cover 22, a fixed frame 23, a movable assembly 24, an upper elastic piece 25, a lower elastic piece 26, a spacer 27 and four magnets 28, wherein the fixed frame 23, the movable assembly 24 and the lens module have the same central axis L.

[0048] The upper cover 21 has four first sides 210 and is roughly in a square structure. The four corners on one surface of the upper cover 21 respectively extend in the same direction to form four upper positioning columns 211. The middle parts of the four first sides 210 Respectively inwardly recess to form a groove 212 .

[0049] The fixing frame 23 is roughly a cube structure, and the geometric center of th...

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Abstract

A voice coil motor, used to drive the movement of the lens module, the voice coil motor includes: a fixed frame with a light hole and a roughly square structure, the four corners of the fixed frame extend toward the light hole respectively to form baffles, The baffle has an upper positioning hole; an upper cover, which is roughly a cube structure, and the upper cover has an upper positioning column corresponding to the upper positioning hole, and the fixed frame and the upper cover are positioned mutually by the upper positioning column and the upper positioning hole; a movable component, which is movable Accommodated in the fixed frame, the movable component includes a movable frame and a coil. The movable frame is used to accommodate the lens module, and the coil is wound around the movable frame; a number of magnets are located between the fixed frame and the movable component. When there is current in the coil, the gap between the magnet and the coil The electromagnetic force is generated between the movable components to move in the fixed frame; and the lower cover is used to support the movable frame and the fixed frame.

Description

technical field [0001] The invention relates to a voice coil motor. Background technique [0002] A traditional voice coil motor includes a casing, an upper cover, a lower cover, a fixed frame, a magnet and movable components and other necessary components (for example, shrapnel). The upper cover has an upper positioning column, the lower cover has a lower positioning column, and the upper positioning column and the length of the lower positioning post are equal to or slightly greater than the height of the fixed mount. The upper positioning column and the lower positioning column abut and fit to clamp and fix the fixed frame inside the space defined by the upper cover and the lower cover. in the holder. Since the upper positioning column and the lower positioning column have a certain thickness and width, the four corners of the fixing frame need to be provided with chamfers, so that the fixing frame as a whole presents an octagonal structure. [0003] The magnets are se...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K33/18G02B7/04
Inventor 王毓斌
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD