# US 2014/0151337 A1 · Electromagnetic relay

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- Number: US 2014/0151337 A1
- Document ID: US20140151337A1
- Status: Published application
- Kind: A1
- Application number: 14/232,798
- Filed: 2013-06-28
- Published: 2014-06-05
- Earliest claimed: 2012-07-04
- Assignees: Fujitsu Component Limited
- Applicants: Fujitsu Component Limited
- Inventors: Nobuyoshi Hiraiwa; Yasushi Saito; Kazutaka Nagamine; Yuki Kakoiyama; Yanfeng Wu
- Web page: https://patentgrep.com/patent/US20140151337A1

## CPC

- H01H 33/182: {using permanent magnets (H01H33/187 takes precedence)}
- H01H 9/36: Metal parts
- H01H 9/443: {using permanent magnets}
- H01H 50/546: {for contactors having bridging contacts}
- H01H: ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES (contact cables H01B7/10; electrolytic self-interrupters H01G9/18; emergency protective circuit arrangements H02H; switching by electronic means without contact-making H03K17/00)

## Abstract

An electromagnetic relay which is improved in arc blocking performance without being increased in size is desired. An electromagnetic relay according to the present invention is provided with a fixed contact, a moving contact which is movable respect to the fixed contact, a pair of magnets which is arranged at the side of the fixed contact and the moving contact so that pole faces with mutually reversed polarity are separated from and face each other and a pair of arc cooling plates which is arranged in a spaces between the magnets and which has first surfaces which face each other across a gap and second surfaces which face a pole face of either of the magnets, respectively.

## Claims

### Claim at position 1

1-4. (canceled)

### Claim 5

An electromagnetic relay comprising:
a fixed contact;
a moving contact movable with respect to said fixed contact;
a pair of magnets which is arranged at the side of said fixed contact and said moving contact so that pole faces with mutually reversed polarity are separated from and face each other; and
a pair of arc cooling plates which is arranged in a space between said magnets and which has first surfaces which face each other across a gap and second surfaces which face a pole face of either of said magnets, respectively.

### Claim 6 (depends on 5)

The electromagnetic relay according to claim 5, wherein said arc cooling plates are made of a ceramic.

### Claim 7 (depends on 6)

The electromagnetic relay according to claim 6, wherein yokes are disposed adjacent to the surfaces opposite to pole faces of said pair of magnets which face each other.

### Claim 8 (depends on 7)

The electromagnetic relay according to claim 7, wherein said pair of arc cooling plates is arranged so that said gap becomes narrower further away from said fixed contact and said moving contact.

### Claim 9 (depends on 6)

The electromagnetic relay according to claim 6, wherein said pair of arc cooling plates is arranged so that said gap becomes narrower further away from said fixed contact and said moving contact.

### Claim 10 (depends on 5)

The electromagnetic relay according to claim 5, wherein yokes are disposed adjacent to the surfaces opposite to pole faces of said pair of magnets which face each other.

### Claim 11 (depends on 10)

The electromagnetic relay according to claim 10, wherein said pair of arc cooling plates is arranged so that said gap becomes narrower further away from said fixed contact and said moving contact.

### Claim 12 (depends on 5)

The electromagnetic relay according to claim 5, wherein said pair of arc cooling plates is arranged so that said gap becomes narrower further away from said fixed contact and said moving contact.