EP 1248494 B1 20090826 - Cup-shaped loudspeaker armature with magnets from neodymium
Title (en)
Cup-shaped loudspeaker armature with magnets from neodymium
Title (de)
Becherförmiger Lautsprecheranker mit Neodymmagneten
Title (fr)
Armature haut-parleur en forme de coupelle avec d'aimants néodymes
Publication
Application
Priority
IT RE20010026 A 20010323
Abstract (en)
[origin: EP1248494A2] A cup (1, 1') for loudspeakers (2, 2') from neodymium, with possible upper planar plates (6) having such a shape as to obtain: greater ventilation air volumes (5, 5'), greater thermal dissipation and greater distance (D, D') between the diametric surfaces (3, 3') of magnets (2, 2') and the internal surfaces (4, 4') of said cups. The cup has a convex shape and the ratio between the medium diameter (A) related to the internal wall at the flexion point and the external diameter (B) ranges between 1.4 and 1.8.
[origin: EP1248494A2] A cup (1) has a convex configuration and the distance between the diametric surface (3) of a neodymium magnet (2) and the internal surface (4) of the cup allows forming of a toroidal chamber (5) with a large air volume to achieve good cooling ventilation of the mobile bobbin and to prevent compression phenomena acting on the loudspeaker.
IPC 8 full level
CPC (source: EP)
H04R 9/025 (2013.01)
Citation (examination)
- US 5987148 A 19991116 - HSIEH CHEN-HUGH [TW]
- "CORNER SPEAKERS' JOHN WATKINSON EXPLAINS WHY SOME WOOFERS ARE GOOD - AND OTHERS AREN'T", ELECTRONICS WORLD, NEXUS MEDIA COMMUNICATIONS, SWANLEY, KENT, GB, 31 January 1998 (1998-01-31), XP000846484
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
EP 1248494 A2 20021009; EP 1248494 A3 20060308; EP 1248494 B1 20090826; EP 1248494 B8 20091007; AR 032994 A1 20031203; AT E441290 T1 20090915; BR 0201190 A 20021210; BR PI0201190 B1 20150818; DE 60233455 D1 20091008; ES 2332446 T3 20100205; IT RE20010026 A0 20010323; IT RE20010026 A1 20020923; PL 211427 B1 20120531; PL 352984 A1 20021007
DOCDB simple family (application)
EP 02004928 A 20020305; AR P020100920 A 20020314; AT 02004928 T 20020305; BR 0201190 A 20020322; DE 60233455 T 20020305; ES 02004928 T 20020305; IT RE20010026 A 20010323; PL 35298402 A 20020323