Speaker diaphragm assembly and a method of manufacturing the sam

Details Speaker diaphragm assembly and a method of manufacturing the sam Speaker diaphragm assembly and a method of manufacturing the sam

1980-09-24

1983-07-26

Stellar, George G.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

179181F, 29594, 181170, 181174, H04R 702, H04R 906, H04R 3100

Patent

active

043955975

ABSTRACT:
A speaker diaphragm assembly comprises a body made of a foam resin, and a sound radiating surface portion integrally formed with the body. In one embodiment, the sound radiating surface portion is made of a foam resin the density of which is greater than that at the body. In another embodiment, the sound radiating surface portion comprises a thin layer made of a solid resin, which thin layer is welded to the body. The rear end portion of the body may be reinforced in the same manner. In another embodiment, a supporting member is attached to the side surface of the diaphragm body for increasing the efficiency in vibration transmission from the voice coil. In another embodiment, a ring-like recess is made in the side surface of the body for spaced electrical terminals, to which heat is transmitted from the voice coil via lead wires, from the body, while a sub cone having low thermal conductivity is sandwiched between the lead wires and the body.

REFERENCES:
patent: 2124834 (1938-07-01), Stenger
patent: 2905260 (1959-09-01), Williams
patent: 3111187 (1963-11-01), Barlow
patent: 3285364 (1966-11-01), Cohen
patent: 3834486 (1974-09-01), Tsuge et al.
patent: 4190746 (1980-02-01), Harwood et al.
patent: 4275278 (1981-06-01), Sakurai et al.
Wireless World, Dec. 1958, pp. 564-569, "Rigidity of Loudspeaker Diaphragms-Advantages of Sandwich Construction", D. A. Barlow.

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