(19)
(11) EP 1 137 032 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
16.07.2003 Bulletin 2003/29

(43) Date of publication A2:
26.09.2001 Bulletin 2001/39

(21) Application number: 01106190.0

(22) Date of filing: 14.03.2001
(51) International Patent Classification (IPC)7: H01H 51/22
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 15.03.2000 EP 00105436

(71) Applicant: Tyco Electronics AMP GmbH
64625 Bensheim (DE)

(72) Inventor:
  • Hendel, Horst
    12209 Berlin (DE)

(74) Representative: Heinz-Schäfer, Marion 
Tyco Electronics Logistics AG Ampèrestrasse 3
9323 Steinach
9323 Steinach (CH)

   


(54) Magnetic switch


(57) The invention relates to a magnetic switch having a yoke (1) which has the shape of a rotationally symmetrical cup (3) on the base (4) of which is arranged a permanent magnet (5). The flux of the permanent magnet (5) is conducted via a core (6), which has a radial core flange (8), to the plate-shaped armature (11). For the operational air gap effective between the armature (11) and the core (6) and the yoke (1) and the magnetic resistance WA thereof, the following relation applies in relation to the marginal air gap (10) formed between the core flange (8) and the yoke (1): WA < WR. As a result of the rotational symmetry with a yoke (1) having the shape of a cup (3), it is possible to generate a high holding force for the armature (11) with a small structural volume.






Search report