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Micro piezoelectric motor-lens integrated driving machine

A piezoelectric motor and integrated drive technology, applied in piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, piezoelectric devices/electrostrictive devices, etc. Failure, complex system and other problems, to achieve the effect of low cost, high driving force and efficiency, and small size

Inactive Publication Date: 2010-04-14
海德星科技(厦门)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The advantage of this piezoelectric drive system is the low drive voltage, the disadvantage is the complex system
In addition, it is also problematic to make a system work simultaneously and maintain both L1 and B2 operating modes, because the resonant frequencies of these two operating modes may change asynchronously due to external factors, which further leads to the synthesis of piezo-generated The elliptical motion is disturbed and disables the drive

Method used

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  • Micro piezoelectric motor-lens integrated driving machine
  • Micro piezoelectric motor-lens integrated driving machine
  • Micro piezoelectric motor-lens integrated driving machine

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Embodiment Construction

[0030] The accompanying drawings non-restrictively disclose some embodiments of the present invention, and the present invention will be further described below in conjunction with specific embodiments.

[0031] Depend on figure 1 It can be seen that the piezoelectric motor 10 shown has an annular piezoelectric stator 20, and an even number of ≥4 (four in this embodiment) centripetal antennae 22a, 22b, 22c and 22d are arranged on the inner ring of the stator. The ends have internal threads 22a', 22b', 22c' and 22d'. The motor 10 also includes a hollow cylindrical rotor 30 having external threads 30a on its exterior. The external threads of the rotor 30 coincide with the internal threads of the four antennas of the stator, so the rotor 30 can be screwed into the center of the stator 20 through threads. The driven lens element 40 is mounted directly inside the cylindrical rotor 30 . figure 2 yes figure 1 The piezoelectric motor 10 and the driven lens 40 are shown as a cross...

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Abstract

The present invention relates to an integrated drive mechanism of tiny piezoelectric motor- lens piece including a ring-shaped piezoelectric stator, a rotor and a drive power supply. Wherein: an innerscrew is positioned in the ring shape piezoelectric stator, and the rotor including external screw is ring shaped or cylinder shaped and is integrated as a whole with the lens piece; the external screw of the rotor is inosculated with the inner screw of the stator; the rotor is spun into the stator through the inosculated crew thread. The advantages are: a super-thin ring-shaped piezoelectric stator is provided, and the lens piece is driven directly as a part of the rotor; an opposite higher driving force and efficiency are provided; the screw thread transmission is not sensitive to the vibration; the motor can work at a lower voltage because the piezoelectric element on the piezoelectric stator is flaky or has a structure of multiple thin pieces; the device is especially adapted to the automatic focusing of the optical lens in the module of mobile telephones and minitype cameras because the motor and lens drive mechanism have less components, a small size and a low cost.

Description

technical field [0001] The invention belongs to the technical field of precision driving components, in particular to an integrated driving mechanism through a micro piezoelectric motor-lens sheet. Background technique [0002] Compared with traditional electromagnetic motors, piezoelectric micromotors and piezoelectric drivers have shown many unique advantages, such as relatively high power density, large driving force, and relatively high efficiency. As precision driving components, piezoelectric motors and drivers are becoming the key components of some high-tech products such as mobile phones, medical imaging systems and other miniature medical devices. All these applications require miniaturized actuators with small size (from 1mm to 1cm), required actuation forces in the range of microNm (μNm) to milliNmNm (mNm), and small power consumption (less than 0.1W). Many new driving technologies, such as voice coil motors, piezoelectric drivers, piezoelectric ultrasonic micr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02N2/00H01L41/09G02B7/08G02B7/10
Inventor 董蜀湘
Owner 海德星科技(厦门)有限公司
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