Flat speaker unit

Details Flat speaker unit Flat speaker unit

1987-04-09

1989-08-22

Moore, David K.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Plural or compound reproducers

381 87, 181148, H04R 102

Patent

active

048603694

ABSTRACT:
A flat speaker device having a flat speaker unit fitted into a through-hole for mounting a speaker of a wall surface board having its back secured to a wall surface leaving a specific spacing therebetween, the flat speaker unit comprising a total-drive type flat speaker comprising a plurality of magnets juxtaposed on a plane and a diaphragm formed from a plurality of projections for respectively covering the plurality of magnets, a speaker frame with a mounting flange mounted on the flat speaker so as to encircle the outer periphery of the flat speaker, rod-like screw members mounted so as to pass through the speaker frame from the front surface towards the back, and swining blades each disposed on the back of the speaker frame with one end threadedly engaged with a respective rod-like screw member and having a length such that when the blade is swung outwardly of a diagonal line of the speaker frame, the tip portion of the blade extends outwardly from the speaker frame.

REFERENCES:
patent: 1997408 (1935-04-01), Holmes
patent: 2224023 (1940-12-01), Sayen et al.
patent: 2917267 (1956-12-01), Riddle
patent: 4228327 (1980-10-01), Sawafuji
patent: 4484658 (1964-11-01), Grote
patent: 4672675 (1987-06-01), Powell et al.

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