Electromagnetic relay

Patent metadata

Field	Value
Publication number	US-11735389-B2
Application number	US-202117497979-A
Country	US
Kind code	B2
Filing date	Oct 11, 2021
Priority date	Oct 20, 2020
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

An electromagnetic relay includes a first movable contact piece, a first movable contact, a second movable contact, a moving member, a coil, and a movable iron core. The moving member holds the first movable contact piece. The moving member is made of a resin having electrical insulation. The moving member includes a first member and a second member. The first member is connected to a movable iron core. The second member is a separate body from the first member. The second member is connected to the first member by snap fitting. The first member includes a convex portion. The convex portion projects toward the second member in a moving direction of the moving member. The second member includes an inspection hole. The inspection hole faces the convex portion in the moving direction and extends in the moving direction.

First claim

The invention claimed is:

1. An electromagnetic relay comprising:
a first fixed terminal;
a first fixed contact connected to the first fixed terminal;
a second fixed terminal;
a second fixed contact connected to the second fixed terminal;
a first movable contact piece;
a first movable contact that faces the first fixed contact, the first movable contact being connected to the first movable contact piece;
a second movable contact that faces the second fixed contact, the second movable contact being connected to the first movable contact piece;
a moving member that holds the first movable contact piece, the moving member being made of a resin having electrical insulation, the moving member being configured to move in a moving direction including a first direction and a second direction, the first direction being a direction in which the first movable contact and the second movable contact come into contact with the first fixed contact and the second fixed contact respectively, the second direction being a direction in which the first movable contact and the second movable contact are separated from the first fixed contact and the second fixed contact respectively;
a housing that supports the moving member in a support direction perpendicular to the moving direction;
a coil; and
a movable iron core connected to the moving member, the movable iron core being configured to move by a magnetic force generated by the coil, wherein
the moving member includes
a first member connected to the movable iron core, and
a second member that is a separate body from the first member, the second member being connected to the first member by snap-fitting,

the first member includes a convex portion that projects toward the second member in the moving direction, and
the second member includes an inspection hole that faces the convex portion in the moving direction, the inspection hole extending in the moving direction.

2. The electromagnetic relay according to claim 1 , wherein
the convex portion extends along the inspection hole.

3. The electromagnetic relay according to claim 1 , wherein
the convex portion overlaps with the movable iron core as seen from the moving direction.

4. The electromagnetic relay according to claim 1 , wherein
the second member includes
a first locking portion that locks to the first member, and
a second locking portion that locks to the first member, the second locking portion being disposed apart from the first locking portion in the support direction, and

the convex portion is disposed between the first locking portion and the second locking portion in the support direction.

5. The electromagnetic relay according to claim 1 , wherein
the first movable contact piece is held between the first member and the second member in the moving direction.

6. The electromagnetic relay according to claim 1 , wherein
the first movable contact and the second movable contact are disposed apart from each other in a lateral direction perpendicular to the moving direction and the support direction, and
the convex portion is disposed between the first movable contact and the second movable contact in the lateral direction.

7. The electromagnetic relay according to claim 1 , further comprising:
a third fixed contact connected to the first fixed terminal;
a fourth fixed contact connected to the second fixed terminal;
a second movable contact piece;
a third movable contact that faces the third fixed contact, the third movable contact being connected to the second movable contact piece; and
a fourth movable contact that faces the fourth fixed contact, the fourth movable contact being connected to the second movable contact piece, wherein
the moving member holds the second movable contact piece,
the second movable contact piece is disposed apart from the first movable contact piece in the support direction, and
the convex portion is disposed between the first movable contact piece and the second movable contact piece in the support direction.

8. The electromagnetic relay according to claim 7 , wherein
the moving member includes
a first support hole in which the first movable contact piece is disposed, and
a second support hole in which the second movable contact piece is disposed,

the second member includes a partition wall disposed between the first support hole and the second support hole, and
the inspection hole is provided in the partition wall.

9. The electromagnetic relay according to claim 1 , wherein
the housing includes a wall portion that faces the moving member in the moving direction,
the wall portion includes a notch, and
the convex portion faces the notch in the moving direction.

Assignees

• Omron Tateisi Electronics Co

Inventors

• Miyake Ayaka
• Yamamoto Shinya
• Otsubo Daisuke

Classifications

• H01H50/60 Primary

  moving contact being rigidly combined with movable part of magnetic circuit {(for polarised relays H01H51/2254, H01H51/2281)} · 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

• H01H50/36

  Stationary parts of magnetic circuit, e.g. yoke · CPC title

• H01H50/58

  Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature · CPC title

• H01H50/64

  Driving arrangements between movable part of magnetic circuit and contact (structurally associated with contact spring sets H01H50/58) · CPC title