FUJI ELECTRIC FA COMPONENTS & SYSTEMS CO., LTD.;FUJI ELECTRIC CO., LTD.
发明人:
Naka Yasuhiro,Takaya Kouetsu,Suzuki Kenji
申请号：
US201514677047
公开号：
US9484173(B2)
申请日:
2015.04.02
申请国别(地区):
美国
年份:
2016
代理人:
Kanesaka Manabu
摘要：
An electromagnetic switch includes a pair of fixed contacts fixed in a contact housing case with a predetermined distance therebetween; a movable contact disposed in the contact housing case to contact to and separate from the pair of fixed contacts; and an electromagnet unit causing the movable contact to contact to and separate from the pair of fixed contacts. The electromagnet unit has a magnetic yoke enclosing an exciting coil, a movable plunger disposed to move through a through hole provided in the magnetic yoke and having a contact pole surface facing the contact pole surface of the magnetic yoke, and a linking shaft linking the movable plunger and the movable contact. The contact pole surface of the movable plunger includes a circular protruding portion having a width narrower than that of a surface facing the magnetic yoke for increasing a magnetic flux density.
