Small piezoelectric or electrostrictive linear motor

A linear motor and telescopic technology, applied in the field of China and Israel
CN1898856AActive Publication Date: 2007-01-17PIEZOELECTRIC TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
PIEZOELECTRIC TECH
Publication Date
2007-01-17

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Abstract

The present invention provides a small piezoelectric / electrostrictive ultrasonic linear motors which are installed in cell phones or PDAs, etc. to drive their camera lenses. In the present invention, a movable shaft (30) is coupled to a unimorph or bimorph, which is made by attaching a piezoelectric or electrostrictive substrate to an elastic body (20) (metal), so that a movable body (40) fitted over the movable shaft (30) is linearly moved along the movable shaft (30) by vibration of the piezoelectric or electrostrictive substrate, thus simplifying a manufacturing process, being easily practicable according to a basic principle, and having superior characteristics.
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Description

technical field

[0001] The present invention generally relates to a small piezoelectric / electrostrictive ultrasonic linear motor installed in a cellular phone or a PDA or the like to drive its camera lens, and more particularly to such a small piezoelectric / electrostrictive ultrasonic linear motor in which The movable shaft 30 is coupled to a unimorph or bimorph made by attaching a piezoelectric or electrostrictive substrate to an elastic body 20 (metal), so that The movable body 40 on the upper linearly moves along the movable shaft 30 by the vibration of the piezoelectric or electrostrictive substrate, thereby simplifying the manufacturing process, and being easy to practice according to the basic principle and having superior characteristics. Background technique

[0002] A small stepper motor that can be installed in a cell phone or PDA etc. to drive its camera lens must be provided with reduced gears and cams to convert high speed rotation into linear motion. In additi...

Claims

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