EP 0516471 A1 19921202 - Magnetic drive system for loudspeaker.
Title (en)
Magnetic drive system for loudspeaker.
Title (de)
Magnetische Antriebsystem für Lautsprecher.
Title (fr)
Système magnétique de commande pour haut-parleur.
Publication
Application
Priority
GB 9111737 A 19910531
Abstract (en)
A loudspeaker construction is disclosed in which a conical diaphragm (15) is caused to generate and radiate sound by means of interaction between a drive coil on a coil former (24) secured to the neck of the diaphragm and a magnet assembly (14) secured to a chassis (10) of the loudspeaker. Electrical energisation of the drive coil produces a drive force acting on the drive coil to move the diaphragm. In order to reduce or prevent radiation of sound from a front ring (11) of the chassis and from a baffle board on which the chassis is mounted arising from reaction to the drive force acting on the magnet assembly, the magnet assembly is mechanically isolated or de-coupled from the chassis. This is accomplished by securing the magnet assembly to the chassis by means of resilient mountings (41) to reduce or prevent transmission of reaction force from the magnet assembly to the chassis. <IMAGE>
IPC 1-7
IPC 8 full level
H04R 1/28 (2006.01); H04R 9/02 (2006.01); H04R 9/06 (2006.01)
CPC (source: EP)
H04R 1/22 (2013.01); H04R 9/02 (2013.01); H04R 9/025 (2013.01); H04R 9/06 (2013.01); H04R 2400/11 (2013.01)
Citation (search report)
- [X] US 3667568 A 19720606 - LIEBSCHER ARTHUR
- [X] EP 0158978 A2 19851023 - QUAAS JUERGEN [DE]
- [X] GB 2001827 A 19790207 - SONY CORP
- [A] DE 3841946 A1 19891109 - PIONEER ELECTRONIC CORP [JP]
- [A] FR 2625639 A1 19890707 - KOBUS STANISLAS [FR]
- [A] DE 3705724 A1 19870917 - PIONEER ELECTRONIC CORP [JP]
Designated contracting state (EPC)
AT BE CH DE DK ES FR IT LI NL SE
DOCDB simple family (publication)
EP 0516471 A1 19921202; CA 2109711 A1 19921210; GB 2256560 A 19921209; GB 2256560 B 19941123; GB 9111737 D0 19910724; NO 934298 D0 19931126; NO 934298 L 19931126; NZ 242962 A 19941026; WO 9222175 A1 19921210
DOCDB simple family (application)
EP 92304950 A 19920529; CA 2109711 A 19920529; GB 9111737 A 19910531; GB 9200970 W 19920529; NO 934298 A 19931126; NZ 24296292 A 19920529