Abstract: A polarized DC electromagnetic device and electromagnetic contactor using same to improve assembly efficiency without size increase of the electromagnetic device. The device includes a plunger inserted through a cylindrical portion of a spool around which an excitation coil is wound and having a first armature and a second armature attached to both ends, an outer yoke attracting the first armature and the second armature, an inner yoke disposed inside the outer yoke and attracting the second armature, and a permanent magnet disposed between the outer yoke and the inner yoke. The spool includes radially protruding flange portions respectively formed at both ends of the cylindrical portion, a coil terminal attachment portion formed in the flange portion on the first armature side, and a coil terminal attached to the coil terminal attachment portion.

Abstract: An electromagnetic contactor in which a shock-absorbing member is integrally formed in a frame. The electromagnetic contactor includes a first frame in which an operating electromagnet is disposed and coil terminals which supply power to a coil of the electromagnet is formed to project from a side surface, and a second frame in which a contact mechanism having an auxiliary contact is disposed and has power source side terminals on one end side and load side terminals on the other end side, and in the first frame and the second frame, a snap fit is formed which can attach the second frame to the first frame in both of a normal direction coupled state where the coil terminals and the power source side terminals face the same direction and a reverse direction coupled state in which the coil terminals and the load side terminals face the same direction.

Abstract: An electromagnetic contactor with connecting spring including: a movable core contact plate section that is inserted into a through hole formed in a movable core and comes into contact with a contact support side of the through hole; and a pair of curved plate sections each joined to either end of the movable core contact plate section and housed in connecting spring tip housing sections formed in the contact support, the sides of which opposite to a contact surface of the movable core contact plate section come into contact with the connecting spring tip housing sections. In the movable core contact plate section, a depressed section is formed in a direction crossing a longitudinal direction to bulge out to an opposite side to the contact support side is formed, and contact sections that come into contact with the through hole are formed on both ends of the depressed section.

Abstract: The DC operated polarized electromagnet includes a spool around which an excitation coil is wound and that has a central opening, a plunger having first and second armatures, fitted individually, an outer yoke enclosing opposing side faces of the spool so as to attract the first armature, an inner yoke arranged on the inner side of the outer yoke so as to attract the second armature, and permanent magnets arranged between the outer yoke and the inner yoke, and reduces magnetoresistance by setting the thickness of the outer yoke thicker than the thickness of the inner yoke so that convergent magnetic flux in the plunger is diverted into the outer yoke.

Abstract: The electromagnetic contactor includes a first frame in which an operation electromagnet is mounted; a second frame in which a contact mechanism is mounted; and a snap-fit section that is made up of a fitting protruding section and a hook section formed to one and the other of the first and second frame, respectively, the hook section fitting to the fitting protruding section. The hook section has a flexible projecting plate section formed in a projecting manner to an open end of either the first or second frame and a fitting section formed at a tip of the flexible projecting plate section, the fitting section fitting to the fitting protruding section. The flexible projecting plate section is provided with elasticity that fits the fitting section to a base side of the fitting protruding section in accordance with progress of wear between the fitting section and the fitting protruding section.

Abstract: There is provided a rail attachment apparatus for an electrical device in which a biasing elastic function is imparted to a slider itself, whereby the slider can be adjusted to be thin and the number of components can be decreased. The rail attachment apparatus includes a nipping portion that nips one side edge of an attaching rail fixed to an attaching surface of the electrical device, and a slider that is opposed to the nipping portion and slidably held at the other side edge of the attaching rail in a direction intersecting with this attaching rail. The slider is provided with integrally formed bending elastic portions which bias the slider in a direction to enable nipping the attaching rail.

Abstract: An electromagnetic contactor capable of coupling either one of an alternating current (AC) electromagnet or a direct current (DC) electromagnet with an identical contact support is provided. The electromagnetic contactor includes an electromagnet including either one of the AC electromagnet (12AC) including a movable core or the DC electromagnet (12DC) including an armature, and a contact support (36) configured to hold plural movable contacts in alignment to be coupled with and driven by the electromagnet. The contact support includes a coupling portion (40) including a movable core contact portion (41), coupling spring edge accommodation portions (46), and armature contact portions (51) arranged on opposite sides with respect to the movable core contact portion of the coupling spring edge accommodation portion. The AC electromagnet (12AC) includes an AC electromagnet coupling spring (56) and the DC electromagnet (12DC) includes a DC electromagnet coupling spring (161).

Abstract: A polarized DC electromagnetic device and electromagnetic contactor using same to improve assembly efficiency without size increase of the electromagnetic device. The device includes a plunger inserted through a cylindrical portion of a spool around which an excitation coil is wound and having a first armature and a second armature attached to both ends, an outer yoke attracting the first armature and the second armature, an inner yoke disposed inside the outer yoke and attracting the second armature, and a permanent magnet disposed between the outer yoke and the inner yoke. The spool includes radially protruding flange portions respectively formed at both ends of the cylindrical portion, a coil terminal attachment portion formed in the flange portion on the first armature side, and a coil terminal attached to the coil terminal attachment portion.

Abstract: The electromagnetic contactor includes a first frame in which an operation electromagnet is mounted; a second frame in which a contact mechanism is mounted; and a snap-fit section that is made up of a fitting protruding section and a hook section formed to one and the other of the first and second frame, respectively, the hook section fitting to the fitting protruding section. The hook section has a flexible projecting plate section formed in a projecting manner to an open end of either the first or second frame and a fitting section formed at a tip of the flexible projecting plate section, the fitting section fitting to the fitting protruding section. The flexible projecting plate section is provided with elasticity that fits the fitting section to a base side of the fitting protruding section in accordance with progress of wear between the fitting section and the fitting protruding section.

Abstract: There is provided a rail attachment apparatus for an electrical device in which a biasing elastic function is imparted to a slider itself, whereby the slider can be adjusted to be thin and the number of components can be decreased. The rail attachment apparatus includes a nipping portion that nips one side edge of an attaching rail fixed to an attaching surface of the electrical device, and a slider that is opposed to the nipping portion and slidably held at the other side edge of the attaching rail in a direction intersecting with this attaching rail. The slider is provided with integrally formed bending elastic portions which bias the slider in a direction to enable nipping the attaching rail.

Abstract: An electromagnetic contactor in which a shock-absorbing member is integrally formed in a frame. The electromagnetic contactor includes a first frame in which an operating electromagnet is disposed and coil terminals which supply power to a coil of the electromagnet is formed to project from a side surface, and a second frame in which a contact mechanism having an auxiliary contact is disposed and has power source side terminals on one end side and load side terminals on the other end side, and in the first frame and the second frame, a snap fit is formed which can attach the second frame to the first frame in both of a normal direction coupled state where the coil terminals and the power source side terminals face the same direction and a reverse direction coupled state in which the coil terminals and the load side terminals face the same direction.

Abstract: An electromagnetic contactor capable of coupling either one of an alternating current (AC) electromagnet or a direct current (DC) electromagnet with an identical contact support is provided. The electromagnetic contactor includes an electromagnet including either one of the AC electromagnet (12AC) including a movable core or the DC electromagnet (12DC) including an armature, and a contact support (36) configured to hold plural movable contacts in alignment to be coupled with and driven by the electromagnet. The contact support includes a coupling portion (40) including a movable core contact portion (41), coupling spring edge accommodation portions (46), and armature contact portions (51) arranged on opposite sides with respect to the movable core contact portion of the coupling spring edge accommodation portion. The AC electromagnet (12AC) includes an AC electromagnet coupling spring (56) and the DC electromagnet (12DC) includes a DC electromagnet coupling spring (161).