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Mobile phone vibration motor mechanism

A vibration motor, mobile phone technology, applied in the direction of generators/motors, electrical components, piezoelectric effect/electrostrictive or magnetostrictive motors, etc., can solve strong vibration sense, cannot provide, cannot show obvious vibration, etc. problem to reduce the impact

Active Publication Date: 2019-10-08
新沂市掌尚电子信息技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current vibration motors mainly use eccentric motors, whose rotating shaft drives an eccentric block whose center of gravity is offset to one side of the rotating shaft to rotate, thereby outputting vibration waves; the characteristic of this kind of mechanism is that it is difficult to adjust the vibration intensity; in fact, this kind of vibration The vibration intensity of the mechanism has a nonlinear relationship with the motor speed. Only when the motor rotation frequency is close to the overall natural frequency of the mobile phone, that is, when the motor reaches the resonance frequency, does it show a strong sense of vibration, and the motor rotation frequency deviates from this When the resonant frequency is reached, the vibration attenuates quickly; therefore, in order to have an obvious output, the output frequency of the motor has generally been modulated to the resonant frequency; and in the silent mode, the eccentric motor in the mobile phone either outputs more obvious vibration at this resonant frequency , or fail to exhibit significant vibrations and provide different vibration intensities

Method used

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Embodiment 1

[0011] exist figure 1 In the shown embodiment one, the vibration motor mechanism of the mobile phone includes a servo motor 2, and the rotating shaft of the servo motor 2 is provided with an eccentric block 3 whose center of gravity is on one side of the rotating shaft; In the card slot 4, and at least one side wall of the servo motor 2 and the slot wall 41 of the card slot are lined with an electrostrictive layer 5 made of electrostrictive material and a layer of rubber gasket 6; The electrostrictive layer 5 deforms in the thickness direction after electrification.

[0012] The electrostrictive layer 5 can be composed of a plurality of piezoelectric ceramic sheets stacked in series to form a larger deformation limit; and the deformation amount is linearly related to the input voltage, and the deformation amount can be continuously adjusted according to the instruction; thus, the The clamping stress between the servo motor 2 and the mobile phone casing 1 is continuously adjus...

Embodiment 2

[0015] for figure 2 The second embodiment shown is different from the first embodiment in that a pair of electromagnets 71, 72 are symmetrically arranged on both sides of the free end of the rotating shaft of the servo motor 2; , alternately facing each of the electromagnets 71, 72; the magnitude of the excitation current of the electromagnets 71, 72 is adjusted by the CPU according to the preset vibration mode. For example, if the two electromagnets 71, 72 are kept at the same excitation current, then when the eccentric mass 3 approaches an electromagnet, the magnetic attraction force it receives increases rapidly, and when leaving the electromagnet, The received magnetic attraction rapidly attenuates, which can make the resistance torque received by the servo motor 2 have greater instability, so as to enhance the vibration effect of the entire mobile phone. When the excitation current is small, this enhancement effect is weak, and the When the excitation current mentioned ...

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Abstract

The invention provides a cell phone vibration motor mechanism including a servo motor. A rotary shaft of the servo motor is provided with an eccentric block whose gravity center is on one side of therotary shaft. The servo motor is clamped rightly in a chute of a cell phone housing. An electrostriction layer made of electrostriction material and a rubber gasket are arranged between at least one side wall of the servo motor and the chute wall of the chute as liners. The electrostriction layer deforms in the thickness direction after being electrified. According to the invention, the cell phonevibration motor mechanism can adjust vibration strength based on needs and is simple in structure and comparatively low in cost.

Description

technical field [0001] The invention relates to the field of electronic accessories, in particular to a mobile phone vibration motor mechanism. Background technique [0002] Vibration motors are relatively basic electronic accessories for mobile phones and other electronic devices, and are used to remind users of information in silent mode. However, the current vibration motors mainly use eccentric motors, whose rotating shaft drives an eccentric block whose center of gravity is offset to one side of the rotating shaft to rotate, thereby outputting vibration waves; the characteristic of this kind of mechanism is that it is difficult to adjust the vibration intensity; in fact, this kind of vibration The vibration intensity of the mechanism has a nonlinear relationship with the motor speed. Only when the motor rotation frequency is close to the overall natural frequency of the mobile phone, that is, when the motor reaches the resonance frequency, does it show a strong sense of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00H02N2/14H02N2/12
Inventor 马根昌
Owner 新沂市掌尚电子信息技术有限公司
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