Diaphragm for a loudspeaker with a moving coil

Details Diaphragm for a loudspeaker with a moving coil Diaphragm for a loudspeaker with a moving coil

2005-04-19

2008-08-26

San Martin, Edgardo (Department: 2837)

Acoustics

Diaphragm

Particular shape

C381S423000, C381S424000

Reexamination Certificate

active

07416047

ABSTRACT:
A preferably elongated loudspeaker (LS), which preferably comprises a cylindrical moving coil (SP) and an elongated diaphragm (M) with an elongated fastening part (B) and an annular retaining part (H) lying within the fastening part (B), and with corrugations (S1) extending in radial directions, wherein the diaphragm (M) comprises an arrangement for reducing its stiffness in at least one narrow region (SM1, SM2), which arrangement is present between the fastening part (B) and the retaining part (H). In a preferred embodiment comprising an arrangement of the corrugations (S1) in the at least one narrow region (SM1, SM2) the corrugation density is smaller than the corrugation density in at least one wide region (BM1, BM2). Preferably, the diaphragm (M) furthermore comprises an additional corrugation (S2) in the at least one narrow region (SM1, SM2), which additional corrugation (S2) extends transversely to radial directions. The above measures serve to reduce the stiffness of the diaphragm (M) locally so as to minimize disadvantageous mechanical forces exerted by the diaphragm (M) on the moving coil (SP).

REFERENCES:
patent: 1640330 (1927-08-01), Lakhovsky
patent: 1732351 (1929-10-01), Borkman
patent: 1734624 (1929-11-01), Harrison
patent: 1870417 (1932-08-01), Mallina
patent: 1918422 (1933-07-01), Nystrom
patent: 1990409 (1935-02-01), Athol
patent: 2302178 (1942-11-01), Brennan
patent: 2439665 (1948-04-01), Marquis
patent: 2531634 (1950-11-01), Lawrance
patent: 2960177 (1960-11-01), Haerther, Jr.
patent: 3132713 (1964-05-01), Seeler
patent: 3342286 (1967-09-01), Staffen
patent: 4321434 (1982-03-01), Irie
patent: 4581496 (1986-04-01), Sweany
patent: 4881617 (1989-11-01), Faraone
patent: 5847332 (1998-12-01), Faraone
patent: 6510232 (2003-01-01), Frasl
patent: 6594372 (2003-07-01), Nakaso
patent: 6654475 (2003-11-01), Nakaso
patent: 6920957 (2005-07-01), Usuki et al.
patent: 6957714 (2005-10-01), Takahashi et al.
patent: 7306073 (2007-12-01), Frasl
patent: 2005/0041830 (2005-02-01), Takewa et al.
patent: 2005/0180592 (2005-08-01), Miura
patent: 2005/0226456 (2005-10-01), Tabata et al.
patent: 2006/0008111 (2006-01-01), Nagaoka
patent: 2007/0047757 (2007-03-01), Yang et al.
patent: 2007/0053547 (2007-03-01), Ando
patent: 1 488 541 (1977-10-01), None
patent: 60220699 (1985-11-01), None
patent: 63 274296 (1988-11-01), None
patent: 06269086 (1994-09-01), None
patent: 09 224297 (1997-08-01), None

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