EP 1969899 A1 20080917 - INERTIAL VOICE TYPE COIL ACTUATOR
Title (en)
INERTIAL VOICE TYPE COIL ACTUATOR
Title (de)
TRÄGHEITSSTELLGLIED DES SCHWINGSPULENTYPS
Title (fr)
ACTIONNEUR DE BOBINE DE TYPE ACOUSTIQUE INERTIEL
Publication
Application
Priority
US 2005044881 W 20051212
Abstract (en)
[origin: WO2007070025A1] The present invention provides an intertial-type voice coil actuator (90) that includes a magnetic flux conductive material core (101) with a continuous channel (103). The channel (103) has antifringing groove. The actuator employs a radially polarized cylindrical magnet (105) spaced in the channel (103) to form a magnetic gap (124) and a conductive coil (106) positioned at least partially in the gap. A multi-component suspension system (92) provides high quality sound using an antifriction bearing (104), a viscous magnetic fluid, and a spider suspension (111). The inertial-type actuator is completed by an integrated mounting apparatus (94). In one embodiment, a receiver (114) and an output disk (112) are interlocked by helical wedges and the actuator is mounted on a sound board. The invention is further modified by the employ of high frequency speaker elements.
IPC 8 full level
H04R 25/00 (2006.01); H04R 1/26 (2006.01); H04R 9/06 (2006.01)
CPC (source: EP)
H04R 1/26 (2013.01); H04R 9/06 (2013.01); H04R 9/066 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2007070025 A1 20070621; AU 2005339167 A1 20070621; CA 2637692 A1 20070621; EP 1969899 A1 20080917; EP 1969899 A4 20100303
DOCDB simple family (application)
US 2005044881 W 20051212; AU 2005339167 A 20051212; CA 2637692 A 20051212; EP 05853729 A 20051212