Voice coil type actuator

Details Voice coil type actuator Voice coil type actuator

1992-05-01

1993-01-26

Voeltz, Emanuel T.

Electrical generator or motor structure

Dynamoelectric

Linear

310 15, 35419512, 359824, H02K 4100, G02B 702

Patent

active

051824817

ABSTRACT:
A voice coil type actuator comprising a guide shaft formed of a material at least a portion in the radial direction in the cross-section of which is permeable, a movable member slidably supported on the guide shaft, a movable coil supported coaxially with the guide shaft on the movable member, a generally tubular yoke surrounding the movable coil and covering the range of the movement thereof, and a magnetic field generating magnet being contacted with the yoke. An axially extending cutout is formed in the yoke. A portion of the movable member projects through the cutout and supports thereon a displaceable member.

REFERENCES:
patent: 3723779 (1973-03-01), Gillum
patent: 4245917 (1981-01-01), Mosciatti et al.
patent: 4439700 (1984-03-01), Menzel et al.
patent: 4560263 (1985-12-01), Katsuma et al.
patent: 4589753 (1986-05-01), Kawai
patent: 4692999 (1987-09-01), Frandsen
patent: 4705311 (1987-11-01), Ragard
patent: 4785210 (1988-11-01), Maruyama et al.
patent: 4828360 (1989-05-01), Maruyama
Abstract of Japanese Pat. No. 60-226732, Nov. 12, 1985.

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