Electromagnetic relay

Patent metadata

Field	Value
Publication number	US-11295918-B2
Application number	US-202017012058-A
Country	US
Kind code	B2
Filing date	Sep 4, 2020
Priority date	Sep 13, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A first fixed terminal includes a first support portion and a first extending portion. The first support portion is located in a closing direction with respect to a movable contact piece. The first support portion supports a first fixed contact. The first support portion extends from the first fixed contact in a first lateral direction. The first lateral direction is one direction in a longitudinal direction of the movable contact piece. The first extending portion is connected to the first support portion. The first extending portion extends in the closing direction from the first support portion. The first extending portion is disposed apart from the movable contact piece in the first lateral direction.

First claim

The invention claimed is:

1. An electromagnetic relay comprising:
a movable contact piece configured to move in a closing direction and an opening direction opposite to the closing direction;
a first movable contact connected to the movable contact piece;
a second movable contact connected to the movable contact piece;
a first fixed contact disposed to face the first movable contact in the closing direction;
a second fixed contact disposed to face the second movable contact in the closing direction;
a first fixed terminal connected to the first fixed contact; and
a second fixed terminal connected to the second fixed contact; wherein
the first fixed terminal includes
a first support portion located in the closing direction with respect to the movable contact piece, the first support portion supporting the first fixed contact, the first support portion extending from the first fixed contact in a first lateral direction that is one direction in a longitudinal direction of the movable contact piece, and
a first extending portion connected to the first support portion, the first extending portion extending from the first support portion in the closing direction, the first extending portion being disposed apart from the movable contact piece in the first lateral direction, and

the second fixed terminal includes
a second support portion located in the closing direction with respect to the movable contact piece, the second support portion supporting the second fixed contact, the second support portion extending from the second fixed contact in a second lateral direction opposite to the first lateral direction in the longitudinal direction of the movable contact piece, and
a second extending portion connected to the second support portion, the second extending portion extending from the second support portion in the closing direction, the second extending portion being disposed apart from the movable contact piece in the second lateral direction.

2. The electromagnetic relay according to claim 1 , further comprising a housing accommodating the movable contact piece, the first movable contact, the second movable contact, the first fixed contact, and the second fixed contact, wherein
the first fixed terminal further includes
a first connection portion connected to the first extending portion, the first connection portion extending from the first extending portion in the second lateral direction, and
a first external terminal connected to the first connection portion, the first external terminal protruding outward of the housing, and
the second fixed terminal further includes
a second connection portion connected to the second extending portion, the second connection portion extending from the second extending portion in the first lateral direction, and
a second external terminal connected to the second connection portion, the second external terminal protruding outward of the housing.

3. The electromagnetic relay according to claim 1 , wherein
the first fixed terminal further includes a first connection portion connected to the first extending portion,
the first connection portion extends from the first extending portion in the first lateral direction,
the second fixed terminal further includes a second connection portion connected to the second extending portion, and
the second connection portion extends from the second extending portion in the second lateral direction.

4. The electromagnetic relay according to claim 3 , further comprising a housing accommodating the movable contact piece, the first movable contact, the second movable contact, the first fixed contact, and the second fixed contact, wherein
the first connection portion protrudes from the housing outward of the housing, and
the second connection portion protrudes from the housing outward of the housing.

5. The electromagnetic relay according to claim 1 , further comprising:
a first magnet disposed so as to cancel out a direction of a magnetic flux generated in the first movable contact and the first fixed contact during energization; and
a second magnet disposed so as to cancel out a direction of a magnetic flux generated in the second movable contact and the second fixed contact during energization.

6. The electromagnetic relay according to claim 1 , further comprising:
a first magnetic shield member disposed between the first extending portion and the movable contact piece in the longitudinal direction of the movable contact piece; and
a second magnetic shield member disposed between the second extending portion and the movable contact piece in the longitudinal direction of the movable contact piece.

7. The electromagnetic relay according to claim 1 , wherein
a distance between the first extending portion and the second extending portion is larger than a length of the movable contact piece in the longitudinal direction of the movable contact piece.

8. The electromagnetic relay according to claim 1 , wherein
a distance between the first fixed contact and the first extending portion is larger than a length of a contact surface between the first movable contact and the first fixed contact, and
a distance between the second fixed contact and the second extending portion is larger than a length of a contact surface between the second movable contact and the second fixed contact.

9. The electromagnetic relay according to claim 1 , wherein
the first extending portion is disposed at a non-overlapping position with the movable contact piece when viewed from the closing direction or the opening direction, and
the second extending portion is disposed at a non-overlapping position with the movable contact piece when viewed from the closing direction or the opening direction.

10. The electromagnetic relay according to claim 1 , further comprising:
a drive shaft connected to the movable contact piece and extending from the movable contact piece in the opening direction; and
a drive device disposed in the opening direction with respect to the movable contact piece; wherein
the drive device includes
a movable iron core connected to the drive shaft, the movable iron core being configured to move in the closing direction and the opening direction, and
a coil configured to generate an electromagnetic force for moving the movable iron core.

Assignees

• Omron Tateisi Electronics Co

Inventors

• Kawaguchi Naoki
• Minowa Ryota
• Harimochi Hiroyuki
• Ogawa Shinichi
• Otsuka Kohei
• Iwasaka Hiroyuki

Classifications

• H01H50/54

  Contact arrangements · CPC title

• H01H50/20

  movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil · CPC title

• H01H50/546 Primary

  for contactors having bridging contacts · CPC title

• H01H50/14 Primary

  Terminal arrangements {(for coils H01H50/443)} · 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