Linear actuator and optical equipment using the same

Details Linear actuator and optical equipment using the same Linear actuator and optical equipment using the same

1998-02-09

1999-08-17

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Linear

H02K 4100

Patent

active

059398043

ABSTRACT:
A linear actuator in a simple structure with an excellent S/N characteristic has a movable coil incorporating a pair of magnetic circuits 8a and 8b. The magnetic circuit 8a comprises yokes 6a and 7a, and a magnet 5a of which polarization direction is vertical with regard to a driving direction. The magnetic circuit 8b has the same structure as 8a. As a position detector, a magnetic sensor 10 and a magnetic scale 11 are disposed opposite with each other on a stator side and on a movable element side respetively.

REFERENCES:
patent: 4697113 (1987-09-01), Young
patent: 5229669 (1993-07-01), Takei
patent: 5536983 (1996-07-01), Araki et al.

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