Electromagnetic relay

Patent metadata

Field	Value
Publication number	US-10892125-B2
Application number	US-201816131764-A
Country	US
Kind code	B2
Filing date	Sep 14, 2018
Priority date	Oct 31, 2017
Publication date	Jan 12, 2021
Grant date	Jan 12, 2021

Abstract

An electromagnetic relay is provided with a housing; a first fixed contact terminal and a second fixed contact terminal secured to the housing; a movable contact accommodated in a chamber in the housing; a movable shaft with one end connected to the movable contact, and a solenoid configured to drive the movable shaft in a contact movement direction. The solenoid includes: a spool with a through-hole in the drum; a fixed armature secured in the through-hole; and a movable armature arranged between the fixed armature in the through-hole and an insulating wall; the movable armature is configured to travel with the movable shaft between an operation position and a return position. The housing includes an alignment part that determines the return position of the movable armature.

First claim

The invention claimed is:

1. An electromagnetic relay comprising: a housing including a first compartment and a second compartment mutually separated by an insulating wall;
a first fixed contact terminal secured to the housing and extending from outside the housing to the first compartment, the first fixed contact terminal including a first fixed contact point in the first compartment;
a second fixed contact terminal secured to the housing and extending from outside the housing to the first compartment, the second fixed contact terminal electrically isolated from the first fixed contact terminal and including a second fixed contact point in the first compartment;
a movable contact arranged in the first compartment, and including a first movable contact point and a second movable contact point, the first and second movable contact points facing the first and second fixed contact points which are arranged between the first and second movable contact points and the insulating wall; the first and second movable contact points configured to travel in a contact movement direction in which the first and second movable contact points make contact with and separate from the first and second fixed contact points;
a movable shaft extending from the first compartment to the second compartment in the contact movement direction with one end in the extension direction arranged in the first compartment and the other end in the extension direction arranged in the second compartment via a through-hole that passes through the insulating wall in the contact movement direction, the one end in the extension direction connected to the movable contact in the first compartment and configured to travel together with the movable contact in the contact movement direction; and
a solenoid in the second compartment configured to drive the movable shaft in the contact movement direction;
the solenoid including:
a spool that includes: a through-hole extending in the contact movement direction and accommodating the other end of the movable shaft, a coil, and a drum with the coil wrapped around the drum in the contact movement direction;
a fixed armature secured in a second through-hole to the far end of the second through-hole relative to the insulating wall in the contact movement direction;
a movable armature arranged in the second through-hole between the fixed armature and the insulating wall and attached to the other end of the movable shaft, the movable armature configured to travel with the movable shaft in the contact movement direction between an operation position and a return position;
the housing including:
an alignment part provided in the second compartment at the insulating wall, the alignment part determining the return position of the movable armature,
wherein the alignment part includes a positioning bump, the positioning bump being a plurality of bumps that each protrude from the insulating wall in the contact movement direction toward the movable armature and each touch the movable armature when the movable armature is at the return position.

2. The electromagnetic relay according to claim 1 , wherein the movable armature is made up of a plurality of laminations layered in a direction intersecting the contact movement direction.

Assignees

• Omron Tateisi Electronics Co

Inventors

• Minowa Ryota
• Mori Shingo

Classifications

• H01H50/045 Primary

  Details particular to contactors (H01H50/042 takes precedence) · CPC title

• H01H2050/225

  with yoke and armature formed by identical stacked laminates, e.g. punched in one and the same tool · CPC title

• H01H50/38

  Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay · CPC title

• H01H50/14

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

• H01H50/546

  for contactors having bridging contacts · CPC title