Linear vibration motor

Abstract

The invention provides a linear vibration motor, which comprises a shell and a vibration assembly accommodated into the shell, wherein the vibration assembly comprises a mass block and an elastic support part; the elastic support part is arranged between the upper end surface of the mass block and the inner side wall of the shell; the mass block is suspended in the shell through the elastic support part; the elastic support part is of a sheet structure and comprises a first fixed end, a second fixed end and a connecting arm; the connecting arm is arranged between the first fixed end and the second fixed end and is of a Z-shaped structure; symmetrically distributed cantilevers of the Z-shaped structure are arranged at two sides of the connecting arm; an isometric dislocation exists between the Z-shaped structures of the connecting arm and the cantilevers in the horizontal direction and effective rakes of the connecting arm and the cantilevers are equal; the first fixed end is fixed on the side wall of the mass block or the side wall of the shell; and the second fixed end is fixed on the side wall of the shell or the mass block. The structure of the elastic support part can be simplified by using the linear vibration motor and stationary vibration of the vibration assembly is achieved.

Description

Technical field [0001] The present invention relates to the technical field of consumer electronic products, and more specifically, to a linear vibration motor. 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 call reminders from mobile phones and vibration feedback from game consoles. However, with the development trend of thinner and lighter electronic products, various internal components also need to adapt to this trend, and miniature vibration motors are no exception. [0003] Existing miniature vibration motors generally include an upper cover, a lower cover forming a vibration space with the upper cover, a vibrator (including masses and permanent magnets) that vibrates linearly in the vibr...

AI Technical Summary

Problems solved by technology

In the prior art, square or rectangular motors usually vibrate on the largest surface, and the distance between the fulcrums of the vibrator is large. The design of the shrapnel is particularly important. With a single or double shrapnel structure, the rigidity of the shrapnel in dimensions other than the vibration direction is poor, and single fulcrums are prone to three. Dimensional deflection, double fulcrums are prone to two-dimensional rotation around the axis

[0005] It can be seen that the current square or rectangular Z / Y linear motor has a serious first-order natural frequency polarization problem due to the unreasonable structure of the elastic support, poor vibration stability, and prone to vibration deflection, resulting in collision noise

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