EP 0467016 A3 19920617 - MAGNETIC CIRCUIT FOR A SPEAKER
Title (en)
MAGNETIC CIRCUIT FOR A SPEAKER
Publication
Application
Priority
- JP 19327790 A 19900720
- JP 28077390 A 19901019
Abstract (en)
[origin: EP0467016A2] A magnetic circuit for a speaker having a yoke (1,15) has a pole (3,16) formed on the yoke base (2,17), an annular magnet (4,19) mounted on the yoke base (2,17), and a top plate (5,18) mounted on the magnet (4,19). The periphery of the magnet (4,19) has an outwardly curved sectional shape. Peripheries of the yoke base (2,17) and the top plate (5,18) have outwardly or inwardly curved sectional shapes (2a,5a,17a,18a), respectively. <IMAGE>
IPC 1-7
IPC 8 full level
H04R 9/02 (2006.01)
CPC (source: EP KR)
H04R 9/025 (2013.01 - EP); H04R 9/04 (2013.01 - KR); H04R 2209/022 (2013.01 - EP)
Citation (search report)
- [Y] US 4386332 A 19830531 - SAITO TATSUO [JP]
- [Y] PATENT ABSTRACTS OF JAPAN, vol. 11, no. 237 (E-528) 4 august 1987; & JP-A-62 048 246 (MORIYAMA KOGYO KK) 2 March 1987
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0467016 A2 19920122; EP 0467016 A3 19920617; EP 0467016 B1 19971008; CA 2038185 A1 19920121; DE 69127862 D1 19971113; DE 69127862 T2 19980528; KR 920003800 A 19920229
DOCDB simple family (application)
EP 91104052 A 19910315; CA 2038185 A 19910313; DE 69127862 T 19910315; KR 910007931 A 19910516