There is provided a contact switching device which has high productivity and in which operation characteristics hardly vary. The contact switching device includes an electromagnetic unit, a holder, a movable shaft, a movable yoke, a movable contact piece having movable contacts at both ends, fixed contacts, and a fixed yoke. At the time of excitation of the electromagnetic unit, the movable shaft moves to the holder side along a direction of an axis center. A magnetic circuit is formed of the fixed yoke and the movable yoke due to a magnetic field generated by a current that flows into the movable contact piece as a result of the movable contacts coming into contact with the fixed contacts. The movable yoke is then attracted to the fixed yoke.

A modular transfer switch (22) and actuator (20) wherein multiple transfer switches are connectable in linear arrangement with the actuator such that the actuator controls the position of all of the transfer switches. Each of the transfer switches (22) includes a contact assembly (48) that converts over-rotation of the drive linkage (26) in the transfer switch to added pressure between the load contacts and the power contacts in the contact assembly. The actuator has an embodiment wherein a joint (400) that connects counter-rotating arms (396,398) is linked to the armature of a linear motor (507) and spring tension from springs (423, 424) is additive to the closing force applied to the transfer switches (22).

A modular transfer switch (22) and actuator (20) wherein multiple transfer switches are connectable in linear arrangement with the actuator such that the actuator controls the position of all of the transfer switches. Each of the transfer switches (22) includes a contact assembly (48) that converts over-rotation of the drive linkage (26) in the transfer switch to added pressure between the load contacts and the power contacts in the contact assembly.

There is provided a contact switching device which has high productivity and in which operation characteristics hardly vary. The contact switching device includes an electromagnetic unit, a holder, a movable shaft, a movable yoke, a movable contact piece having movable contacts at both ends, fixed contacts, and a fixed yoke. At the time of excitation of the electromagnetic unit, the movable shaft moves to the holder side along a direction of an axis center. A magnetic circuit is formed of the fixed yoke and the movable yoke due to a magnetic field generated by a current that flows into the movable contact piece as a result of the movable contacts coming into contact with the fixed contacts. The movable yoke is then attracted to the fixed yoke.

An electromagnetic relay includes: a pair of fixed contact terminals, each of which has a fixed contact; a movable contact spring having a pair of movable pieces and a coupler coupling the pair of movable pieces, each of the movable pieces having a movable contact that contacts and is separated from the fixed contact; an armature having a flat plate to be adsorbed to an iron core and a hanging portion bent from the flat plate and extending downward, and moves the movable contact spring by a rotation operation; and an electromagnetic device driving the armature, wherein the hanging portion has a projection to fix the movable contact spring on a face thereof facing the electromagnetic device and a pulling portion that extends downward more than the projection and pulls the movable contact spring when a current flows between the fixed contact and the movable contact.

The present invention relates to a direct current relay, and more particularly, to a direct current relay capable of reducing an electronic repulsive force generated between a fixed contact and a movable contact by a permanent magnet installed to extinguish an arc. The direct current relay includes: a frame; first and second fixed contacts spaced from each other with a predetermined distance there between; first and second magnetic substances formed to enclose a lower part of the first and second fixed contacts; a movable contact movable to contact or to be separated from the first and second fixed contacts, having a first movable contact contactable to the first fixed contact, and having a second movable contact contactable to the second fixed contact; and a pair of permanent magnets installed on long sides of the frame.

A direct-current contactor includes a contact assembly, an arc extinguishing assembly, and a drive assembly. The arc extinguishing assembly is disposed around the contact assembly. The contact assembly includes a moving contact mechanism and a stationary contact mechanism that are disposed in pairs. The moving contact mechanism includes a moving contact. The stationary contact mechanism includes a stationary contact and an arc introducing plate disposed around the stationary contact. The arc introducing plate is configured to introduce an electric arc generated between the moving contact mechanism and the stationary contact mechanism into the arc extinguishing assembly. The drive assembly is configured to drive a connection or a disconnection of the moving contact and the stationary contact.

A direct current relay comprises a magnetism forming unit accommodated in a frame unit. The magnetism forming unit comprises a first magnet member and a second magnet member. A magnetism strengthening member is provided between the first and second magnet member. The magnetism strengthening member strengthens the magnetic field formed between the first and second magnet member. Therefore, the flow of the magnetic field formed inside an arc chamber is strengthened so as to effectively form an arc extinguishing path. The magnetism strengthening member can apply an electromagnetic attractive force to a movable core. Therefore, the movable core receives the electromagnetic attractive force according to magnetization of a fixed core, and also the electromagnetic attractive force from the magnetism strengthening member. Thus, since a driving force for moving the movable core increases, the operation reliability of the movable core can be improved.