Speaker with a molded plastic frame including a positioning proj

Details Speaker with a molded plastic frame including a positioning proj Speaker with a molded plastic frame including a positioning proj

1994-04-06

1996-12-10

Kuntz, Curtis

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381188, 381205, 381204, 381201, H04R 2500

Patent

active

055839452

ABSTRACT:
A plastic-molded frame 3 has a bottom-closed cylindrical magnetic circuit holding portion 2 which has a positioning projection 6 provided in a central portion on a bottom surface 2a of the magnetic circuit holding portion 2. A magnetic circuit is incorporated in the magnetic circuit holder 2 by putting a bottom plate 9 on the bottom 2a such that a positioning recess 12 in the lower surface of the bottom plate 9 engages the positioning projection 6, next putting a ring-shaped magnet 13 on the bottom plate by using a magnet guide 11 on the bottom plate 9, next putting a top plate 14 on the magnet 13, and next urging the top plate 14 down and rotating it in a predetermined direction such that engaging portions 16 provided along the outer circumferential edge of the top plate 14 engage with engaging projections 8 extending from the upper open end of the magnetic circuit holder 2 and such that slanted surfaces 7 of the engaging projections 8 tightly contract the entirety of the members 14, 13, 9 in the magnetic circuit holder 2.

REFERENCES:
patent: 4234766 (1980-11-01), Cacho
patent: 4465906 (1984-08-01), Adolph et al.
patent: 4507800 (1985-03-01), Kelley
patent: 4665550 (1987-05-01), Haas
patent: 5157731 (1992-10-01), Mitobe
patent: 5243151 (1993-09-01), Prokisch

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