Electromagnetic relay

Patent metadata

Field	Value
Publication number	US-9412545-B2
Application number	US-201414450330-A
Country	US
Kind code	B2
Filing date	Aug 4, 2014
Priority date	Aug 26, 2013
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

An electromagnetic relay includes a contact part including a fixed contact and a movable contact, the movable contact being displaceable in an approaching/separating direction with respect to the fixed contact; a drive part including a coil, a movable core, and a fixed core, the movable core being connected to the movable contact via an axial core, and the fixed core including a first plate member having a through hole through which the axial core is inserted and a second plate member that encapsulates the coil; and a permanent magnet polarized in a direction substantially perpendicular to the approaching/separating direction. The first plate member or the second plate member includes an extension part that extends toward the contact part, the extension part being configured to hold the permanent magnet.

First claim

What is claimed is:

1. An electromagnetic relay comprising:
a contact part including a fixed contact and a movable contact, the movable contact being displaceable in an approaching/separating direction with respect to the fixed contact;
a drive part including a coil, a movable core, and a fixed core, the movable core being connected to the movable contact via an axial core, and the fixed core including a first plate member having a through hole through which the axial core is inserted and a second plate member that encapsulates the coil;
a permanent magnet polarized in a direction substantially perpendicular to the approaching/separating direction; and
a resin molded member arranged at a side of the first plate member toward the contact part, the resin molded member including a hole corresponding to the first through hole, a sloped surface extending from an outer periphery of the hole toward the drive part, and a flat surface extending from an outer periphery of the sloped surface in a direction substantially perpendicular to the axial core,
wherein the first plate member or the second plate member includes an extension part that extends toward the contact part, the extension part being configured to hold the permanent magnet, and
wherein the extension part is formed by bending one of the first plate member and the second plate member to hold the permanent magnet.

2. The electromagnetic relay as claimed in claim 1 , further comprising:
an arc extinguishing part configured to extinguish an arc generated between the fixed contact and the movable contact.

3. The electromagnetic relay as claimed in claim 2 , wherein the arc extinguishing part includes at least one of an arc extinguishing grid and an arc runner.

4. The electromagnetic relay as claimed in claim 1 , wherein the first plate member and the second plate member are yokes, and wherein the extension part is integrated with the yokes.

Assignees

• Fujitsu Component Ltd

Inventors

• Kubono Kazuo
• Hasegawa Yoichi

Classifications

• H01H50/60 Primary

  moving contact being rigidly combined with movable part of magnetic circuit {(for polarised relays H01H51/2254, H01H51/2281)} · CPC title

• H01H50/18

  Movable parts of magnetic circuits, e.g. armature · CPC title

• H01H50/546

  for contactors having bridging contacts · CPC title

• H01H9/443

  using permanent magnets · CPC title

• H01H50/36

  Stationary parts of magnetic circuit, e.g. yoke · CPC title