Relay

• US 20090072935A1
• Filed: 05/29/2008
• Published: 03/19/2009
• Est. Priority Date: 09/14/2007
• Status: Active Grant

• Current Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Original Assignee: Fujitsu Component Limited (Fujitsu Limited)
• Inventors: Takano, Satoshi, Yuba, Takashi, Saso, Hirofumi
• Granted Patent: US 8,193,881 B2
• Time in Patent Office: Days
• 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 closeable first gap; a second opening and closing part including an openable and closeable 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 opening and closing part including an openable and closeable first gap;

a second opening and closing part including an openable and closeable 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 a same direction.

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

the first opening and closing part includes a first movable contact and a first fixed contact facing each other across the first gap so as to be movable into and out of contact with each other, a first movable spring terminal having the first movable contact, and a first fixed spring terminal having the first fixed contact, and

the second opening and closing part includes a second movable contact and a second fixed contact facing each other across the second gap so as to be movable into and out of contact with each other, a second movable spring terminal having the second movable contact, and a second fixed spring terminal having the second fixed contact.

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

the first gap of the first opening and closing part includes a first gap part and a second gap part,

the first opening and closing part includes a first movable contact and a first fixed contact facing each other across the first gap part so as to be movable into and out of contact with each other;

a second movable contact and a second fixed contact facing each other across the second gap part so as to be movable into and out of contact with each other;

a first fixed spring terminal having the first fixed contact;

a second fixed spring terminal having the second fixed contact; and

a first movable spring member having the first movable contact and the second movable contact, the first movable spring member extending over the first fixed spring terminal and the second fixed spring terminal,

the second gap of the second opening and closing part includes a third gap part and a fourth gap part,

the second opening and closing part includes a third movable contact and a third fixed contact facing each other across the third gap part so as to be movable into and out of contact with each other;

a fourth movable contact and a fourth fixed contact facing each other across the fourth gap part so as to be movable into and out of contact with each other;

a third fixed spring terminal having the third fixed contact;

a fourth fixed spring terminal having the fourth fixed contact; and

a second movable spring member having the third movable contact and the fourth movable contact, the second movable spring member extending over the third fixed spring terminal and the fourth fixed spring terminal, and

the permanent magnet is configured to apply the magnetic field on the first gap part, the second gap part, the third gap part, and the fourth gap part in the same direction.

4. The relay as claimed in claim 1, further comprising:

a case having a side plate part and a top plate part and covering the first opening and closing part, the second opening and closing part, and the magnetization driving part,

wherein the permanent magnet is fixed to the top plate part of the case.

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

6. The relay as claimed in claim 1, wherein the permanent magnet has a monolithic structure extending over the first gap of the first opening and closing part and the second gap of the second opening and closing part.

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

the permanent magnet includes a first permanent magnet and a second permanent magnet facing the first gap and the second gap, respectively,

the first permanent magnet is placed so that a center thereof is offset in a direction in which an arc generated in the first gap is blown off relative to a center of the first gap, and

the second permanent magnet is placed so that a center thereof is offset in a direction in which an arc generated in the second gap is blown off relative to a center of the second gap.

8. The relay as claimed in claim 1, wherein the permanent magnet is one of a samarium-cobalt magnet, a neodymium magnet, and a ferrite magnet.

9. 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.

10. 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 spring 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 spring terminal having the second movable contact, and a second fixed spring terminal having the second fixed contact;

a case including a side plate part and a top plate part and covering 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.

11. The relay as claimed in claim 10, 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.

12. The relay as claimed in claim 10, wherein each of the first and second permanent magnets is one of a samarium-cobalt magnet, a neodymium magnet, and a ferrite magnet.

13. The relay as claimed in claim 10, wherein the case has a heat-resisting structure.

14. 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 10,

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.

15. 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 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 first fixed spring terminal having the first fixed contact, a second fixed spring terminal having the second fixed contact, and a first movable spring member having the first movable contact and the second movable contact, the first movable spring member extending over the first fixed spring terminal and the second fixed spring terminal;

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 third movable contact and a third fixed contact facing each other across a third gap so as to be movable into and out of contact with each other, a fourth movable contact and a fourth fixed contact facing each other across a fourth gap so as to be movable into and out of contact with each other, a third fixed spring terminal having the third fixed contact, a fourth fixed spring terminal having the fourth fixed contact, and a second movable spring member having the third movable contact and the fourth movable contact, the second movable spring member extending over the third fixed spring terminal and the fourth fixed spring terminal;

a case including a side plate part and a top plate part and covering 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 that the first permanent magnet faces the first and second gaps and the second permanent magnet faces the third and fourth gaps, the first permanent magnet and the second permanent magnet being oriented so as to have a same magnetic pole facing toward the first through fourth gaps.

16. The relay as claimed in claim 15, wherein:

the case has a partition plate part provided therein, and

the partition plate part is positioned between the first relay main body and the second relay main body.

17. The relay as claimed in claim 15, wherein:

the first magnetization driving part of the first relay main body includes a first card to which the first movable spring member is fixed, and

the second magnetization driving part of the second relay main body includes a second card to which the second movable spring member is fixed.

18. The relay as claimed in claim 15, wherein each of the first and second permanent magnets is one of a samarium-cobalt magnet, a neodymium magnet, and a ferrite magnet.

19. The relay as claimed in claim 15, wherein the case has a heat-resisting structure.

20. 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 15,

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.

21. A relay, comprising:

a 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 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 first fixed spring terminal having the first fixed contact, a second fixed spring terminal having the second fixed contact, and a first movable spring member having the first movable contact and the second movable contact, the first movable spring member extending over the first fixed spring terminal and the second fixed spring terminal;

a second opening and closing part including a third movable contact and a third fixed contact facing each other across a third gap so as to be movable into and out of contact with each other, a fourth movable contact and a fourth fixed contact facing each other across a fourth gap so as to be movable into and out of contact with each other, a third fixed spring terminal having the third fixed contact, a fourth fixed spring terminal having the fourth fixed contact, and a second movable spring member having the third movable contact and the fourth movable contact, the second movable spring member extending over the third fixed spring terminal and the fourth fixed spring terminal;

a single magnetization driving part configured to cause the first opening and closing part and the second opening and closing part to operate;

a case including a side plate part and a top plate part and covering the first opening and closing part, the second opening and closing part, and the magnetization driving part; and

a first permanent magnet and a second permanent magnet fixed to the top plate part of the case so that the first permanent magnet faces the first and second gaps and the second permanent magnet faces the third and fourth gaps, the first permanent magnet and the second permanent magnet being oriented so as to have a same magnetic pole facing toward the first through fourth gaps.

22. The relay as claimed in claim 21, wherein each of the first and second permanent magnets is one of a samarium-cobalt magnet, a neodymium magnet, and a ferrite magnet.

23. The relay as claimed in claim 21, wherein the case has a heat-resisting structure.

24. 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 21,

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.