Linear vibration generation device for cellphone

Abstract

The invention relates to a linear vibration generation device for a cellphone, and the device comprises a housing, a pedestal, a flexible circuit board, a spring, a magnet supporting bowl, a coil, an annular magnet, a mass block, a buffering pad, and upper and lower magnetic conduction rings. Each magnetic conduction ring is an assembly-type overall annular magnet which consists of a plurality of fan-shaped magnet units, and the directions of the magnetic poles of the magnet units are arranged radially, which means that the polarity of the external peripheral surface is N or S, and the polarity of the internal peripheral surface is S or N. The assembly-type overall annular magnets are disposed in the magnet supporting bowl, and the magnet supporting bowl is fixedly connected with a spring. The upper magnetic conduction ring is disposed at a side end of the upper surface of the magnet, and the lower magnetic conduction ring is disposed at one side end of the lower surface of the magnet. The beneficial effects of the invention are that the device remarkably weakens the adverse impact on the frequency characteristics and noise distribution from the magnet while employing the bigger magnet to improve the vibration power, and improves the yield of products. The attraction between the magnet and the housing is apparently less than the attraction in the prior art, and the noise caused by the impact of the magnet and the housing is also apparently reduced.

Description

technical field [0001] The invention relates to the field of vibration generating devices, in particular to a linear vibration generating device for mobile phones. Background technique [0002] At present, vibration generating devices for mobile phones can be divided into two types according to the vibration generation methods. One is the vibration motor with eccentric rotor rotation. The main disadvantages of this type of motor are short life, slow start and stop response, and therefore poor touch feedback. The other is a mass resonance vibration type linear vibration generating device. The main characteristics of this linear vibration generating device are long life, fast start and stop response, good touch feedback effect after being applied to touch screen mobile phones, and are widely used in touch screen smartphones superior. With the increase of mobile phone functions and the design of light weight and thin shape, the space left for the vibration generating device i...

AI Technical Summary

Problems solved by technology

[0003] However, for mobile phone vibration generators, in addition to the size of the vibration force, the spread of resonance frequency and the level of noise are also very important performance indicators. If the frequency spread is large or the noise level increases, it will inevitably lead to a decrease in product yield and increase in cost.

Although the problem of increasing the vibration force is solved by increasing the volume of the magnet and increasing the energy of the magnetic field, as the energy of the magnetic field increases, the influence of the magnet on other properties increases significantly, which induces other problems and affects the performance most For the frequency characteristics and the spread of noise, it directly affects the yield of the product

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