US 12,451,311 B2
Electromagnetic relay with re-arcing suppression
Naoki Kawaguchi, Kyoto (JP); and Takeshi Nishida, Kyoto (JP)
Assigned to OMRON CORPORATION, Kyoto (JP)
Appl. No. 18/262,919
Filed by OMRON Corporation, Kyoto (JP)
PCT Filed Jan. 18, 2022, PCT No. PCT/JP2022/001569
§ 371(c)(1), (2) Date Jul. 26, 2023,
PCT Pub. No. WO2022/181118, PCT Pub. Date Sep. 1, 2022.
Claims priority of application No. 2021-029809 (JP), filed on Feb. 26, 2021.
Prior Publication US 2024/0096580 A1, Mar. 21, 2024
Int. Cl. H01H 50/38 (2006.01); H01H 50/02 (2006.01)
CPC H01H 50/38 (2013.01) [H01H 50/02 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electromagnetic relay, comprising:
a first fixed terminal;
a first fixed contact connected to the first fixed terminal;
a first movable contact configured to contact and separate from the first fixed contact;
a second fixed terminal disposed apart from the first fixed terminal in a longitudinal direction;
a second fixed contact connected to the second fixed terminal;
a second movable contact configured to contact and separate from the second fixed contact;
a case housing the first fixed terminal, the first fixed contact, the first movable contact, the second fixed terminal, the second fixed contact, and the second movable contact, the case including
a first longitudinal inner side surface extending in the longitudinal direction and disposed apart from the first fixed terminal in a lateral direction perpendicular to the longitudinal direction, and
a first lateral inner side surface extending in the lateral direction and including a first central surface facing the first fixed terminal in the longitudinal direction and a first arc contact surface located between the first central surface and the first longitudinal inner side surface in the lateral direction;
a first inner wall disposed between the first fixed terminal and the first longitudinal inner side surface in the lateral direction and extending in the longitudinal direction;
a first gas passage including a first inlet facing the first arc contact surface in the longitudinal direction, the first gas passage extending in the longitudinal direction, the first gas passage being disposed between the first inner wall and the first longitudinal inner side surface; and
a first magnet disposed in the longitudinal direction with respect to the first central surface, the first magnet being configured to elongate an arc generated between the first fixed contact and the first movable contact toward the first are contact surface.