Linear vibration motor

Abstract

The invention provides a linear vibration motor. The linear vibration motor comprises an oscillator and a stator arranged in parallel to the oscillator, the oscillator comprises a counterweight and a vibration block embedded and fixed in the counterweight, the vibration block comprises at least two permanent magnets arranged around an axis in the vertical direction of the oscillator and magnetic yokes arranged between abutted surfaces of the abutted permanent magnets, the polarities of the permanent magnets close to the position of the axis are the same, and the cross section of a magnetism-collecting area of the permanent magnets close to the position of the axis is smaller than the maximum cross section of the permanent magnets in the magnetism-collecting direction. According to the linear vibration motor, the vibration block of the linear vibration motor is formed by employing a specific arrangement manner of heteromorphic structure magnets, the effective magnetic field of the vibration block can be increased as much as possible in a limited space, the acting force between the oscillator and the stator is larger, and high vibration effect is obtained.

Description

technical field [0001] The invention relates to the technical field of consumer electronics, and more specifically, relates to a linear vibration motor applied to portable consumer electronics products. Background technique [0002] With the development of communication technology, portable electronic products, such as mobile phones, handheld game consoles or handheld multimedia entertainment devices, have entered people's lives. In these portable electronic products, micro-vibration motors are generally used for system feedback, such as mobile phone call notifications, game console vibration feedback, and so on. However, with the development trend of thinner and lighter electronic products, various internal components also need to adapt to this trend, and the micro vibration motor is no exception. [0003] Existing miniature vibrating motors generally include an upper cover, a lower cover forming a vibration space with the upper cover, a vibrator (including counterweights ...

AI Technical Summary

Problems solved by technology

[0004] In the micro-vibration motor with the above-mentioned structure, the force driving the vibration of the vibrator all comes from the magnetic field force between the vibrator and the coil. Due to the limited internal space of the micro-vibration motor, the volume of the magnet that can be accommodated in a certain space is also limited. However, the magnetic field force between the vibrator and the coil formed by the traditional regular shape and conventional arrangement of magnets is also limited, so that there is not much room for improvement in the vibration sense of the vibrator vibration, which is not conducive to the improvement of the vibration sense of electronic products.

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