Miniature motor

Details Miniature motor Miniature motor

1993-12-16

1995-08-22

La Balle, Clayton E.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 51, H02K 524

Patent

active

054443148

ABSTRACT:
A miniature motor comprising a case made of a metallic material, formed into a bottom hollow tubular shape and having a permanent magnet fixedly fitted to the inner circumferential surface thereof, a rotor consisting of an armature facing the permanent magnet and a commutator, and a case cover engaged with an open end of the case and comprising brushes making sliding contact with the commutator and input terminals electrically connected to the brushes; the rotor being rotatably supported by bearings provided on the bottom of the case and the case cover, and a printed circuit board having a control element and a soundproofing plate made of a soundproofing material being provided outside the case cover, in which the soundproofing plate is formed into a cross shape when projected on a plane orthogonally intersecting the axial line of the rotor.

REFERENCES:
patent: 1688891 (1928-10-01), Spreen
patent: 2301425 (1942-11-01), List
patent: 3330515 (1967-07-01), Janssen et al.
patent: 3459977 (1969-08-01), Janssen
patent: 3527969 (1970-09-01), Papst

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