Magnetic conductive device and voice coil motor

Abstract

The invention discloses a magnetic conductive device of a voice coil motor and the voice coil motor. The magnetic conductive device of the voice coil motor comprises a non-annular magnet cylinder and a magnetic conductive member, wherein a first side surface and a second side surface of the non-annular magnet cylinder are opposite and have different polarities. The magnetic conductive member is provided with a top plate, a bottom plate and a side plate, wherein the side plate is connected between the top plate and the bottom plate, the top plate of the magnetic conductive member covers a top surface of the non-annular magnet cylinder, the side plate of the magnetic conductive member covers the first side surface of the non-annular magnet cylinder. According to the above magnetic conductive device, the stability, electromagnetic thrust and efficiency of the voice coil motor can be raised.

Description

technical field [0001] The invention relates to a magnetic conduction device and a voice coil motor, in particular to a magnetic conduction device capable of providing concentrated distribution of magnetic force lines and a voice coil motor with the magnetic conduction device. Background technique [0002] Traditional voice coil motors have the advantages of small size, low power consumption and low price, and are suitable as actuators in electronic products (such as digital cameras, mobile phones, digital video cameras, etc.). refer to figure 1 , figure 1 It is a schematic diagram of the structure of a traditional voice coil motor. The voice coil motor 1 mainly includes a fixed component 10 and a movable component 12 , wherein the movable component 12 is movably installed in the fixed component 10 . The movable component 12 includes a lens mount 120 and a coil 122 , wherein the coil 122 is wound around the periphery of the lens mount 120 . The aforementioned lens holder...

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Problems solved by technology

[0004] However, the setting of the magnetic permeable frame 102 limits the development of the miniaturization of the voice coil motor 1. At the same time, the magnetic permeable frame 102 provides a magnetic circuit with a long magnetic force line Φ, so that the magnetic force line Φ generated by the magnet 104 cannot completely match the coil 122 under power. function, thus causing the waste of the magnetic field line Φ

[0005] In addition, the magnet 104 is adhered to the inner wall of the fixed base 13 of the voice coil motor 1 only by glue. Therefore, as the usage time increases, the glue will fall off, resulting in poor stability between the magnet 104 and the fixed base 13, which in turn leads to The stability, magnetism and efficiency of the voice coil motor 1 become poor

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