Contact point device and electromagnetic relay

Patent metadata

Field	Value
Publication number	US-11404231-B2
Application number	US-201917286935-A
Country	US
Kind code	B2
Filing date	Sep 19, 2019
Priority date	Nov 13, 2018
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

A contact point device includes: a fixed contact; a movable contactor that has a movable contact capable of being in contact with the fixed contact by moving in parallel with a first direction, and extended along a second direction orthogonal to the first direction; a containing chamber that contains the fixed contact and the movable contact; and a shielding wall disposed inside the containing chamber. The containing chamber has a first space and a second space, the shielding wall faces the first space or the second space, the shielding wall includes a partition wall located between the first space and the second space, the first space and the second space are disposed side by side in a third direction orthogonal to the first direction and the second direction, and the partition wall is located in the first direction from the fixed contact and the movable contact.

First claim

The invention claimed is:

1. A contact point device comprising:
a first fixed contact;
a movable contactor that has a first movable contact capable of being in contact with the first fixed contact by moving in parallel with a first direction, and extended along a second direction orthogonal to the first direction;
a containing chamber that contains the first fixed contact and the first movable contact; and
a shielding wall disposed inside the containing chamber, wherein
the containing chamber has a first space and a second space,
the shielding wall faces the first space or the second space,
the shielding wall includes a partition wall located between the first space and the second space,
the first space and the second space are disposed side by side in a third direction orthogonal to the first direction and the second direction,
the partition wall is located in the first direction from the first fixed contact and the first movable contact, and
at least a part of the partition wall overlaps the first fixed contact when viewed in the first direction.

2. The contact point device according to claim 1 , wherein the partition wall extended along the second direction when viewed in the first direction.

3. The contact point device according to claim 1 , wherein at least one of the first space and the second space is at least a part of an extension space where an arc can be extended.

4. The contact point device according to claim 3 further comprising
a bottom wall located in the first direction from the first space and the second space, and facing the first space and the second space,
wherein the partition wall is located between the bottom wall and the first movable contact.

5. The contact point device according to claim 4 , wherein the shielding wall has a side wall that protrudes from a peripheral edge of the bottom wall in a direction opposite to the first direction.

6. The contact point device according to claim 1 further comprising:
a drive shaft that moves the movable contactor in parallel with the first direction; and
a wall portion that is tubular and disposed inside the containing chamber and surrounds the drive shaft.

7. The contact point device according to claim 1 further comprising
a permanent magnet that generates a magnetic flux directed in the second direction between the first fixed contact and the first movable contact.

8. The contact point device according to claim 7 , wherein the permanent magnet is disposed at a position aligned with the movable contactor in the second direction.

9. The contact point device according to claim 8 , wherein the permanent magnet is disposed at a position aligned with the movable contactor in the third direction.

10. The contact point device according to claim 1 , wherein the partition wall has electrical insulation.

11. The contact point device according to claim 1 further comprising an second fixed contact, wherein
the movable contactor further has a second movable contact, and
the second movable contact faces the second fixed contact.

12. An electromagnetic relay comprising:
the contact point device according to claim 1 ; and
an electromagnet device having an exciting coil.

13. The electromagnetic relay according to claim 12 , wherein
the electromagnet device has a yoke that a magnetic flux generated by the exciting coil passes through,
the yoke includes a first yoke disposed between the movable contactor and the exciting coil, and
the contact point device further includes a cover that has electrical insulation, the cover being disposed between the first yoke and the movable contactor to cover the first yoke.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Sakai Satoshi

Classifications

• H01H2050/025

  containing inert or dielectric gasses, e.g. SF6, for arc prevention or arc extinction · CPC title

• H01H9/30

  Means for extinguishing or preventing arc between current-carrying parts · CPC title

• H01H50/02

  Bases; Casings; Covers (frames for mounting two or more relays or for mounting a relay and another electric component H02B1/01, H04Q1/08, H05K) · CPC title

• H01H50/54 Primary

  Contact arrangements · CPC title

• H01H50/10

  Electromagnetic or electrostatic shielding (casings H01H50/02) · CPC title