Electromagnetic relay

Patent metadata

Field	Value
Publication number	US-11222761-B2
Application number	US-201816957322-A
Country	US
Kind code	B2
Filing date	Dec 20, 2018
Priority date	Dec 28, 2017
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A displaceable portion of a moving contactor is connected to, and electrically conductive with, a pair of moving contacts. An armature actuates the moving contactor. The armature has an adhering portion to be adhered onto an electromagnet. A space inside an opening that exposes a part (an exposed part) of the displaceable portion crosses a predetermined plane. The predetermined plane intersects at right angles with an arrangement direction (a first direction) in which the pair of moving contacts is arranged side by side. The predetermined plane passes through a center between both ends in the arrangement direction of the adhering portion.

First claim

The invention claimed is:

1. An electromagnetic relay comprising:
a pair of fixed contacts;
a moving contactor including a pair of moving contacts corresponding one to one to the pair of fixed contacts and a displaceable portion connected to, and electrically conductive with, the pair of moving contacts and displaceable along with the pair of moving contacts;
an overlay arranged to overlap with the displaceable portion;
an electromagnet having an excitation coil; and
an armature configured to actuate the moving contactor by being attracted toward the electromagnet with electromagnetic force generated by the electromagnet to bring each of the pair of moving contacts into, or out of, contact with a corresponding one of the pair of fixed contacts,
the armature having an adhering portion to be adhered onto the electromagnet with the electromagnetic force generated by the electromagnet,
the overlay having an opening that exposes a part of the displaceable portion,
a space inside the opening crossing a predetermined plane that intersects at right angles with an arrangement direction in which the pair of moving contacts is arranged side by side,
the predetermined plane passing through a center between both ends in the arrangement direction of the adhering portion.

2. The electromagnetic relay of claim 1 , wherein
a midpoint between respective centers of the pair of moving contacts is located on the predetermined plane.

3. The electromagnetic relay of claim 1 , wherein
in a direction in which the displaceable portion and the electromagnet are arranged, the opening is located on an opposite side from the electromagnet with respect to the displaceable portion.

4. The electromagnetic relay of claim 1 , further comprising a stopper configured to, while the pair of moving contacts is out of contact with the pair of fixed contacts, keep in contact with at least one of the moving contactor or the armature from an opposite side from the electromagnet in a direction in which the adhering portion and the electromagnet are arranged, wherein
the stopper crosses the predetermined plane.

5. The electromagnetic relay of claim 1 , further comprising a movable spring fixed to the armature and electrically insulated from the moving contactor, wherein
the movable spring is fixed to the moving contactor via the overlay and configured to displace the moving contactor by being deformed as the armature is displaced.

6. The electromagnetic relay of claim 1 , wherein
the displaceable portion includes a pair of displaceable springs corresponding one to one to the pair of moving contacts, and
the pair of displaceable springs is connected to, and electrically conductive with, the pair of moving contacts, respectively.

7. The electromagnetic relay of claim 2 , wherein
in a direction in which the displaceable portion and the electromagnet are arranged, the opening is located on an opposite side from the electromagnet with respect to the displaceable portion.

8. The electromagnetic relay of claim 2 , further comprising a stopper configured to, while the pair of moving contacts is out of contact with the pair of fixed contacts, keep in contact with at least one of the moving contactor or the armature from an opposite side from the electromagnet in a direction in which the adhering portion and the electromagnet are arranged, wherein
the stopper crosses the predetermined plane.

9. The electromagnetic relay of claim 3 , further comprising a stopper configured to, while the pair of moving contacts is out of contact with the pair of fixed contacts, keep in contact with at least one of the moving contactor or the armature from an opposite side from the electromagnet in a direction in which the adhering portion and the electromagnet are arranged, wherein
the stopper crosses the predetermined plane.

10. The electromagnetic relay of claim 2 , further comprising a movable spring fixed to the armature and electrically insulated from the moving contactor, wherein
the movable spring is fixed to the moving contactor via the overlay and configured to displace the moving contactor by being deformed as the armature is displaced.

11. The electromagnetic relay of claim 3 , further comprising a movable spring fixed to the armature and electrically insulated from the moving contactor, wherein
the movable spring is fixed to the moving contactor via the overlay and configured to displace the moving contactor by being deformed as the armature is displaced.

12. The electromagnetic relay of claim 4 , further comprising a movable spring fixed to the armature and electrically insulated from the moving contactor, wherein
the movable spring is fixed to the moving contactor via the overlay and configured to displace the moving contactor by being deformed as the armature is displaced.

13. The electromagnetic relay of claim 2 , wherein
the displaceable portion includes a pair of displaceable springs corresponding one to one to the pair of moving contacts, and
the pair of displaceable springs is connected to, and electrically conductive with, the pair of moving contacts, respectively.

14. The electromagnetic relay of claim 3 , wherein
the displaceable portion includes a pair of displaceable springs corresponding one to one to the pair of moving contacts, and
the pair of displaceable springs is connected to, and electrically conductive with, the pair of moving contacts, respectively.

15. The electromagnetic relay of claim 4 , wherein
the displaceable portion includes a pair of displaceable springs corresponding one to one to the pair of moving contacts, and
the pair of displaceable springs is connected to, and electrically conductive with, the pair of moving contacts, respectively.

16. The electromagnetic relay of claim 5 , wherein
the displaceable portion includes a pair of displaceable springs corresponding one to one to the pair of moving contacts, and
the pair of displaceable springs is connected to, and electrically conductive with, the pair of moving contacts, respectively.

Assignees

• Panasonic Ip Man Co Ltd

Inventors

• Yamagata Katsutoshi

Classifications

• H01H2011/0075

  calibrating mechanical switching properties, e.g. "snap or switch moment", by mechanically deforming a part of the switch, e.g. elongating a blade spring by puncturing it with a laser · CPC title

• H01H50/54

  Contact arrangements · CPC title

• H01H50/42

  Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement · CPC title

• H01H11/0062

  Testing or measuring non-electrical properties of switches, e.g. contact velocity (monitoring contacts H01H1/0015; monitoring gas density H01H33/563; monitoring vacuum H01H33/668; calibrating H01H69/01; adjusting H01H71/74; testing of electrical properties G01R31/333) · CPC title

• H01H9/443

  using permanent magnets · CPC title