H - Electricity – 01 – F
Patent
H - Electricity
01
F
H01F 7/14 (2006.01) H01H 50/16 (2006.01) H01H 53/015 (2006.01) H01H 50/24 (2006.01) H01H 50/36 (2006.01)
Patent
CA 2058376
A miniaturized electromagnet has an enhanced armature attraction force and reliable armature movement. The electromagnet comprises an L-shaped flat magnetic plate of magnetic material with a horizontally extending core and a first yoke leg depending from one end of the core. An excitation coil is wound around the core. A second yoke member is separately formed from the magnetic plate into a plate configuration and is coupled secured at its upper end to the other end of the core so as to depend therefrom in an opposed relation to the first yoke leg. The lower end portion of the second yoke leg is bent toward the first yoke leg to define thereat a pole plate extending in parallel with the core. An armature extends in a parallel relation to the core and is magnetically coupled at its one end to the first yoke leg and is pivotally supported adjacent thereto such that the armature is pivotable within a horizontal plane between set and reset positions of having the pole end attracted to and spaced away from the second yoke leg in response to the energization and deenergization of the excitation coil, respectively. With the provision of the pole plate extending toward the first yoke leg, the armature can be made to have a correspondingly reduced effective length and equivalent mass, whereby the armature can have an increased magnetically attraction force for reliable electromagnetic operation.
Fukuzono Hideki
Ichiya Mitsuo
Inoue Kazuhiko
Kaji Norimasa
Nishimura Hiromi
Marks & Clerk
Matsushita Electric Works Ltd.
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