Electromagnetic relay

Patent metadata

Field	Value
Publication number	US-10741349-B2
Application number	US-201716309778-A
Country	US
Kind code	B2
Filing date	Jun 22, 2017
Priority date	Jul 29, 2016
Publication date	Aug 11, 2020
Grant date	Aug 11, 2020

Abstract

An electromagnetic relay includes a box-shaped insulating housing in which a closed space is formed, a pair of fixed terminals fixed to the housing electrically independently of each other and each having a fixed contact placement surface in the closed space, a plate-shaped conductive movable contactor that is provided in the closed space, has a first surface facing the fixed contact placement surfaces of the pair of fixed terminals, and is movably disposed such that the first surface approaches and separates from the fixed contact placement surfaces of the pair of fixed terminals, a pair of fixed contacts respectively provided on the fixed contact placement surfaces of the pair of fixed terminals, and a pair of movable contacts that is respectively provided on the first surface of the movable contactor and respectively face the pair of fixed contacts.

First claim

The invention claimed is:

1. An electromagnetic relay comprising:
a box-shaped insulating housing in which a closed space is formed;
a pair of fixed terminals fixed to the housing electrically independently of each other and each having a fixed contact placement surface in the closed space;
a plate-shaped conductive movable contactor that:
is provided in the closed space,
has a first surface facing the fixed contact placement surfaces of the pair of fixed terminals, and
is movably disposed such that the first surface approaches and separates from the fixed contact placement surfaces of the pair of fixed terminals;

a pair of fixed contacts respectively provided on the fixed contact placement surfaces of the pair of fixed terminals;
a pair of movable contacts that:
is respectively provided on the first surface of the movable contactor and respectively face the pair of fixed contacts,
is respectively come into contact with the pair of fixed contacts with approach of the movable contactor to the pair of fixed terminals, and
is disposed so as to respectively separate from the pair of fixed contacts with separation of the movable contactor from the pair of fixed terminals;

a plurality of first electromagnetic members that:
are disposed electrically independently of each other, with a gap provided therebetween in a first direction that is an arrangement direction of the pair of fixed terminals, between the pair of fixed terminals in the housing,
are fixed to the pair of fixed terminals electrically independently, and
extend in a second direction orthogonal to the first direction in a plan view seen along a moving direction of the movable contactor; and

a second electromagnetic member comprising:
a pair of facing portions disposed so as to sandwich the movable contactor in the second direction and extending along the first direction, and
a coupling portion fixed to a second surface on an opposite side of the movable contactor from the first surface and configured to couple the pair of facing portions on the second surface side,

wherein the second electromagnetic member is configured such that:
the pair of facing portions face respective one ends of the plurality of first electromagnetic members on the movable contactor side in the moving direction, and
a gap is provided between the second electromagnetic member and the one ends of the plurality of first electromagnetic members when the pair of movable contacts respectively come into contact with the pair of fixed contacts.

2. The electromagnetic relay according to claim 1 , wherein each of the plurality of first electromagnetic members is made of a wall member extending from one end to the other end, in the second direction, of an inner surface of the housing forming the closed space.

3. The electromagnetic relay according to claim 2 , wherein the respective ends of the plurality of first electromagnetic members are located between the pair of fixed contacts and the movable contactor in the moving direction of the movable contactor.

4. The electromagnetic relay according to claim 2 , further comprising:
a coil spring that comes into contact with the second surface of the movable contactor and expands and contracts along the moving direction of the movable contactor; and
a coil-spring holding portion comprising:
a support plate portion configured to sandwich the coil spring together with the movable contactor,
a pair of support portions that extend from both ends of the support plate portion facing each other in the second direction to both ends of the movable contactor in the second direction and are disposed such that each of the pair of facing portions of the second electromagnetic member is located between each of the pair of support portions and the movable contactor, and
a coupling rod provided on the first surface of the movable contactor and extending in the second direction to be coupled to the pair of support portions,

wherein the coupling rod is provided so as to be insertable into the gap between the plurality of first electromagnetic members.

5. The electromagnetic relay according to claim 1 , wherein the respective ends of the plurality of first electromagnetic members are located between the pair of fixed contacts and the movable contactor in the moving direction of the movable contactor.

6. The electromagnetic relay according to claim 5 , further comprising:
a coil spring that comes into contact with the second surface of the movable contactor and expands and contracts along the moving direction of the movable contactor; and
a coil-spring holding portion comprising:
a support plate portion configured to sandwich the coil spring together with the movable contactor,
a pair of support portions that extend from both ends of the support plate portion facing each other in the second direction to both ends of the movable contactor in the second direction and are disposed such that each of the pair of facing portions of the second electromagnetic member is located between each of the pair of support portions and the movable contactor, and
a coupling rod provided on the first surface of the movable contactor and extending in the second direction to be coupled to the pair of support portions,

wherein the coupling rod is provided so as to be insertable into the gap between the plurality of first electromagnetic members.

7. The electromagnetic relay according to claim 1 , further comprising:
a coil spring that comes into contact with the second surface of the movable contactor and expands and contracts along the moving direction of the movable contactor; and
a coil-spring holding portion comprising:
a support plate portion configured to sandwich the coil spring together with the movable contactor,
a pair of support portions that extend from both ends of the support plate portion facing each other in the second direction to both ends of the movable contactor in the second direction and are disposed such that each of the pair of facing portions of the second electromagnetic member is located between each of the pair of support portions and the movable contactor, and
a coupling rod provided on the first surface of the movable contactor and extending in the second direction to be coupled to the pair of support portions,

wherein the coupling rod is provided so as to be insertable into the gap between the plurality of first electromagnetic members.

Assignees

• Omron Tateisi Electronics Co

Inventors

• Minowa Ryota
• Mori Shingo
• Kakimoto Toshiyuki
• Ikemoto Kazuhiro

Classifications

• H01H1/64 Primary

  Protective enclosures, baffle plates, or screens for contacts · CPC title

• H01H50/54

  Contact arrangements · CPC title

• H01H50/56

  Contact spring sets · CPC title

• H01H50/546

  for contactors having bridging contacts · CPC title

• H01H50/14

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