Swing-type actuator

Details Swing-type actuator Swing-type actuator

1991-10-09

1992-12-01

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Reciprocating

310 13, 360106, H02K 3300, G11B 555

Patent

active

051681854

ABSTRACT:
A swing-type actuator having (a) a housing including a pair of yokes opposing each other and a permanent magnet attached to at least one of the yokes for defining a magnetic gap therebetween; (b) a swingable arm having one end to which a movable coil is fixed and the other end to which a function member is fixable, such that the movable coil is swingable in the magnetic gap; (c) a hold member formed from injection molded thermoplastic resin, which encompasss a periphery of the movable coil and is integrally fixed to the arm; and (d) a resin coating layer formed on surfaces of the movable coil and the hold member to minimize detachment of mold "flashes". Also, surfaces on the arm and adjacent ledge surfaces on the hold member are provided to promote alignment of the parts in the mold and thereby minimizes flash formation. The hold member also can include an integral rib inside the hollow coil and a stopper member to prevent inadvertent contact between lead wires and non-associated terminal pins during molding.

REFERENCES:
patent: 4150407 (1979-04-01), Dijkstra
patent: 4196456 (1980-04-01), Manzke et al.
patent: 4544973 (1985-10-01), Van De Bult
patent: 4553058 (1985-11-01), Iwasaki
patent: 4639624 (1987-01-01), Ejiri et al.
patent: 4849840 (1989-07-01), Fujioka
patent: 4855853 (1989-08-01), Matsushita et al.
patent: 4879617 (1989-11-01), Sampietro et al.
patent: 4949194 (1990-08-01), MacPherson et al.
patent: 4951023 (1990-08-01), Erd et al.
patent: 4985652 (1991-01-01), Oudet et al.
patent: 5034837 (1991-07-01), Schmitz

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