Relay

• US 8,477,000 B2
• Filed: 05/07/2012
• Issued: 07/02/2013
• Est. Priority Date: 09/14/2007
• Status: Active Grant

• Current Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Original Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Inventors: Yuba, Takashi, Takano, Satoshi, Saso, Hirofumi
• Primary Examiner(s): Rojas, Bernard
• Application Number:
  US13/465,608
• Publication Number:
  US 20120223790A1
• Time in Patent Office: 421 Days
• Field of Search: 335 78- 86, 335/124, 335128-135, 335/201, 335/202
• US Class Current: 335/201
• CPC Class Codes: H01H 2050/049 Assembling or mounting multiple relays in one common housing
• CPC Class Codes: H01H 51/06 Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
• CPC Class Codes: H01H 9/443 using permanent magnets

Abstract

A relay is disclosed that includes a first opening and closing part including an openable and closable first gap; a second opening and closing part including an openable and closable second gap, the second opening and closing part being placed side by side with the first opening and closing part so that the first gap and the second gap are arranged side by side; a magnetization driving part configured to cause the first opening and closing part and the second opening and closing part to simultaneously operate; and a permanent magnet configured to apply a magnetic field on the first gap of the first opening and closing part and the second gap of the second opening and closing part in the same direction.

Claims

1. A relay, comprising:

a first relay main body including a first opening and closing part and a first magnetization driving part configured to cause the first opening and closing part to operate, the first opening and closing part including a first movable contact and a first fixed contact facing each other across a first gap so as to be movable into and out of contact with each other, a first movable terminal having the first movable contact, and a first fixed spring terminal having the first fixed contact;

a second relay main body including a second opening and closing part and a second magnetization driving part configured to cause the second opening and closing part to operate, the second opening and closing part including a second movable contact and a second fixed contact facing each other across a second gap so as to be movable into and out of contact with each other, a second movable terminal having the second movable contact, and a second fixed terminal having the second fixed contact;

a case that includes a first side plate part, a second side plate part facing toward the first side plate part, and a top plate part and covers the first relay main body and the second relay main body; and

a first permanent magnet and a second permanent magnet fixed to the top plate part of the case so as to face the first gap and the second gap, respectively, the first permanent magnet and the second permanent magnet being oriented so as to have a same magnetic pole facing toward the first and second gaps,

wherein the first permanent magnet and the second permanent magnet apply magnetic fields on the first gap and the second gap, respectively, to blow off a first arc generated in the first gap and a second arc generated in the second gap in opposite directions toward the first side plate part and the second side plate part, respectively.

2. The relay as claimed in claim 1, wherein:

the case has a partition plate part provided therein,

the first relay main body and the second relay main body include a first base and a second base, respectively, and

the partition plate part engages the first base and the second base.

3. The relay as claimed in claim 1, wherein each of the first and second permanent magnets is one of a samarium-cobalt magnet, a neodymium magnet, and a ferrite magnet.

4. The relay as claimed in claim 1, wherein the case has a heat-resisting structure.

5. A circuit device, comprising:

a first circuit interconnection connecting a positive terminal of a direct-current power supply and a load;

a second circuit interconnection connecting a negative terminal of the direct-current power supply and the load; and

the relay as set forth in claim 1,

wherein the relay is provided so that the first opening and closing part makes and breaks the first circuit interconnection and the second opening and closing part makes and breaks the second circuit interconnection.