An electromagnetic relay includes a pair of fixed terminals, a movable contact piece, and a magnet portion. The pair of fixed terminals includes fixed contact. The movable contact piece that includes a movable contact disposed facing the fixed contact and that is movable in a first direction in which the movable contact contacts the fixed contact and in a second direction in which the movable contact separates from fixed contact. The magnet portion generating a magnetic field for extending an arc generated between the fixed contact and the movable contact. At least one of a corner portion in the first direction side of the fixed terminal located in an arc extension direction in which the arc is extended or a corner portion in the second direction side of the movable contact piece located in the arc extension direction has a chamfered shape in a range where the arc passes through.

Provided is a contact device including a first contact, a second contact that is movable relative to the first contact and is brought into contact with or separated from the first contact, a first body part including the first contact, a second body part including the second contact, and a yoke arranged adjacent to at least one of the first body part or the second body part. At least a part of the yoke is arranged along magnetic flux generated by a current flowing through one body part of the first body part and the second body part that is adjacent to the yoke, in a region where the first body part and the second body part overlap each other when viewed along an axis in which the first contact and the second contact move relative to each other while the first contact and the second contact are in contact with each other.

Provided is a contact device including a first contact, a second contact that is movable relative to the first contact and is brought into contact with or separated from the first contact, a first body part including the first contact, a second body part including the second contact, and a yoke arranged adjacent to at least one of the first body part or the second body part. At least a part of the yoke is arranged along magnetic flux generated by a current flowing through one body part of the first body part and the second body part that is adjacent to the yoke, in a region where the first body part and the second body part overlap each other when viewed along an axis in which the first contact and the second contact move relative to each other while the first contact and the second contact are in contact with each other.

A contact device includes a fixed contact, a movable contact, a housing, and an arc extinguishing member. The movable contact moves between a closed position where the movable contact contacts the fixed contact and an open position where the movable contact is separate from fixed contact. The housing houses the fixed contact and the movable contact. The arc extinguishing member is disposed in the housing and discharges an arc extinguishing gas. The arc extinguishing member is disposed facing a gap between the fixed contact and the movable contact when the movable contact is in the open position. The arc extinguishing member has a shape that tapers toward the gap.

Disclosed are an arc path formation unit and a direct current relay including same. An arc path formation unit according to an embodiment of the present disclosure comprises a plurality of magnet parts. One of the plurality of magnet parts is disposed on one surface of a magnet frame. The remaining magnet parts among the plurality of magnet parts are disposed on the other respective surfaces of the magnet frame. The magnet part disposed on the one surface is formed longer than the other magnet parts. Also, the magnet parts disposed on the other surface are spaced apart from each other as far as possible. Accordingly, the magnetic field formed between the magnet parts is formed such that the electromagnetic force generated in each of stationary contacts is generated in a direction away from the central region. As a result, damage to components disposed in the central region can be prevented.

Disclosed are an arc path formation unit and a direct current relay including same. An arc path formation unit according to an embodiment of the present disclosure comprises a plurality of magnet parts. One of the plurality of magnet parts is disposed on one surface of a magnet frame. The remaining magnet parts among the plurality of magnet parts are disposed on the other respective surfaces of the magnet frame. The magnet part disposed on the one surface is formed longer than the other magnet parts. Also, the magnet parts disposed on the other surface are spaced apart from each other as far as possible. Accordingly, the magnetic field formed between the magnet parts is formed such that the electromagnetic force generated in each of stationary contacts is generated in a direction away from the central region. As a result, damage to components disposed in the central region can be prevented.

A hermetically sealed electromagnetic contactor includes a pair of fixed contact pieces having fixed contacts, a movable contact piece having a pair of movable contacts and capable of coming into contact with and being separated from the fixed contacts of the pair of fixed contact pieces, an electromagnet unit configured to drive the movable contact piece, a hermetically sealed container configured to house the pair of fixed contact pieces, the movable contact piece, and the electromagnet unit in the same space in a hermetically sealed manner and being filled with arc-extinguishing gas, and two pairs of arc-extinguishing permanent magnets arranged inside the hermetically sealed container and configured to stretch arcs generated between the fixed contacts of the pair of fixed contact pieces and the pair of movable contacts of the movable contact piece.

A hermetically sealed electromagnetic contactor includes a pair of fixed contact pieces having fixed contacts, a movable contact piece having a pair of movable contacts and capable of coming into contact with and being separated from the fixed contacts of the pair of fixed contact pieces, an electromagnet unit configured to drive the movable contact piece, a hermetically sealed container configured to house the pair of fixed contact pieces, the movable contact piece, and the electromagnet unit in the same space in a hermetically sealed manner and being filled with arc-extinguishing gas, and two pairs of arc-extinguishing permanent magnets arranged inside the hermetically sealed container and configured to stretch arcs generated between the fixed contacts of the pair of fixed contact pieces and the pair of movable contacts of the movable contact piece.

An electromagnetic relay includes a base, at least one fixed conductive sheet assembly, at least one movable conductive sheet assembly, at least one arc blow component, an electromagnet and an outer cap. The fixed conductive sheet assembly includes a fixed connecting plate and a fixed contact, and the movable conductive sheet assembly includes a movable connecting plate and a movable contact. The base is made of a thermal conductive polymer, and the fixed connecting plate has a first heat conduction part installed in the base and a second heat conduction part connected to the first heat conduction part and extended to an outer side of the base. The electromagnetic relay further includes at least two thermal conduction components installed in the base and symmetrically configured on both opposite sides of the fixed and movable contacts respectively for dissipating the heat generated by the electromagnetic relay.

An electromagnetic relay includes a base, an electromagnet block having a spool with a through hole opening at a flange portion thereof and mounted on an upper surface of the base, a movable iron piece, a movable contact piece rotatable integrally with the movable iron piece, a movable contact fixed to a free end of the movable contact piece, and a fixed contact fixed to a fixed contact terminal and contactable with and separable from the movable contact along with rotation of the movable contact piece. Insulating ribs project from an inward facing surface of a spacer integrally formed with the movable iron piece and an outward facing surface of the flange portion respectively such that the insulating ribs intercept a straight line connecting a magnetic pole portion projecting through the through hole and the fixed contact or the fixed contact terminal with a shortest distance.