Abstract: A relay unit electrically opens and closes between a power supply and a power-consuming device. The relay unit includes electronic components in a housing including a case and a cover, the electronic components including a resistor, a first relay connected in series with the resistor, and a second relay, the second relay connecting the power supply and the power-consuming device through an external connection terminal and being connected in parallel with the resistor and the first relay.

Abstract: An object of the invention is to provide a contact switching device that prevents scattered objects caused by arc from coming in, so that the scattered objects do not disturb operation of a movable shaft. For this, there is provided a contact switching device in which a movable iron core (142) provided at one end portion of a movable shaft (145) is attracted to a fixed iron core (138), based on excitation and degauss of an electromagnet portion, by which the movable shaft (145) reciprocates in a shaft center direction, and a movable contact (148a) of a movable contact piece (148) arranged at another end portion of the movable shaft (145) contacts and departs from a fixed contact (133a).

Abstract: The invention provides a sealed contact device capable of extinguishing an arc which extends in an arbitrary direction. The sealed contact device includes a housing; a fixed contact and a movable contact disposed in the housing in such a manner as to face each other; and permanent magnets which are disposed with the fixed contact and the movable contact interposed therebetween and which attracts an arc between the fixed contact and the movable contact using a magnetic force. An arc shielding member is disposed at a position to which the arc is attracted by current flowing between the fixed contact and the movable contact and by the magnetic force between the permanent magnets, in the housing.

Abstract: An object of the present invention is to provide a contact switching device having high dimension accuracy and an inexpensive price, and including a small sealed space. For this, there is provided a contact switching device that drives a contact mechanical portion (30) arranged inside a sealed space (43) to perform contact switching, based on excitation and degauss of an electromagnet portion (50) arranged outside the sealed space (43). Particularly, a ceramic plate (31) holding a fixed contact terminal (33) of the contact mechanical portion (30) is bonded to and integrated with an upper opening edge portion of a metal cylindrical flange (32), while a plate-like yoke (37) is bonded to and integrated with a lower opening edge portion opposed to the upper opening edge portion to form the sealed space (43).

Abstract: An object of the present invention is to provide a contact switching device that has small hitting sound during operation and is excellent in impact resistance. For this, there is a contact switching device in which a movable iron core (142) provided at one end portion of a movable shaft is attracted to a fixed iron core, based on excitation and degauss of an electromagnet portion, by which the movable shaft reciprocates in a shaft center direction, and a movable contact of a movable contact piece arranged at another end portion of the movable shaft contacts and departs from a fixed contact. Particularly, the movable iron core (142) has a cylindrical outer circumferential portion (142a) and an annular attracting and sticking portion (142b), and a ratio between an inner diameter and an outer diameter of the cylindrical outer circumferential portion (142a) is 77% or less.

Abstract: An object of the present invention is to provide a contact switching device in which a short circuit contingent to flow-out of scattered objects caused by arc is eliminated, so that life durability is increased. For this, there is provided a contact switching device in which a movable iron core provided at one end portion of a movable shaft is attracted to a fixed iron core, based on excitation and degauss of an electromagnet portion, by which the movable shaft reciprocates in a shaft center direction, and movable contacts of a movable contact piece arranged at another end portion of the movable shaft contact and depart from fixed contacts. Particularly, contact surfaces between the fixed contacts and the movable contacts are arranged inside a box-shaped insulating member, and an opening portion of the insulating member is closed by a lid body having at least one extending portion in a direction of an arc generated between the fixed contacts and the movable contacts.

Abstract: An object of the present invention is to provide a contact switching device that does not require proficiency for brazing a metal component to a through-hole of a sealed container made of ceramic, and is excellent in impact resistance. For this, there is provided a contact switching device that drives a contact mechanical portion arranged inside a sealed space to switch contacts, based on excitation and degauss of an electromagnet portion arranged outside the sealed space. Particularly, a ceramic plate (131) holding a fixed contact terminal (133) of the contact mechanical portion, and a first metal component are bonded and integrated to form the sealed space, and an outer circumferential portion of a vent pipe (134) is brazed through a metal ring portion (172a) arranged along an opening edge portion of a through-hole (131b) provided in the ceramic plate (131).

Abstract: An object of the present invention is to provide a contact switching device having a smaller height dimension. For this, there is provided a contact switching device in which a movable iron core (142) provided at one end portion of a movable shaft (145) is attracted to a fixed iron core (138), based on excitation and degauss of an electromagnet portion, by which the movable shaft (145) reciprocates in a shaft center direction, and a movable contact (148a) of a movable contact piece (148) arranged at another end portion of the movable shaft (145) contacts and departs from a fixed contact (133a). Two coil springs (147a, 147b) different in length and diameter are put on the movable shaft (145), and one of the coil springs (147a) is arranged inside the other coil spring (147b).

Abstract: An object of the invention is to provide a contact switching device that produces minimal hitting sound at the time of return. In the contact switching device, a movable iron core (42) provided at one end portion of a movable shaft (45) is attracted to a fixed iron core (38), based on excitation and degauss of an electromagnet portion (50), by which the movable shaft (45) reciprocates in a shaft center direction, and a movable contact (48a) of a movable contact piece (48) arranged at another end portion of the movable shaft (45) contacts and departs from a fixed contact (33a). Particularly, at the time of return, an annular flange portion (45a) provided at an intermediate portion of the movable shaft (45) abuts on an annular receiving portion (35c) of the magnet holder (35) to thereby restrict a position of the movable iron core (42).

Abstract: An object of the present invention is to provide a contact coil terminal having smaller numbers of components and assembling manhours, and thus, higher productivity. For this, there is a coil terminal 153 in which a press-fitting portion is pressed into a press-fitting groove (152c) provided at a corner portion of a flange portion (152a) of a spool (152) with a coil wound therearound, and a lead-out line of the coil is entwined around a coil entwining portion (153a) projected from the flange portion (152a), and the coil entwining portion (153a) is bent and raised. Particularly, the coil entwining portion (153a) extends in an opposite direction of a press-fitting direction of the press-fitting portion so as to be able to be bent and raised, and a lead wire connecting portion (153b) extends laterally to the press-fitting direction so as to be able to be bent and raised.

Abstract: An object of the present invention is to provide a contact switching device that does not cause a contact failure due to resin powder, and has higher contact reliability. For this, there is a contact switching device in which a movable iron core provided at one end portion of a movable shaft (145) is attracted to a fixed iron core, based on excitation and degauss of an electromagnet portion, by which the movable shaft (145) reciprocates in a shaft center direction, and a movable contact (148a) of a movable contact piece (148) arranged at another end portion of the movable shaft (145) contacts and departs from a fixed contact. Inside a magnet holder (135) containing the movable contact piece (148), metal position restricting plate (162) that can abut on at least one side of the movable contact piece (148) is arranged.

Abstract: A sealed contact device has a plate-like yoke having a center hole therein, a closed-ended cylinder having an opening edge portion that is integrated with a lower-surface edge portion of the center hole of the plate-like yoke to form a sealed space, an annular flange having an outer peripheral edge portion that is integrally welded to an upper surface of the plate-like yoke, a ceramic case having a lower end surface that is brazed to an upper surface of the annular flange, an electromagnetic unit disposed in an outer periphery of the closed-ended cylinder, a movable iron core that reciprocates in the closed-ended cylinder based on excitation and demagnetization of the electromagnetic unit, a movable shaft having a first end fixed to the movable iron core, a movable contact of a movable touch piece fixed to a second end of the movable shaft, a fixed contact disposed in the ceramic case, and an annular rib projected in the upper surface of the annular flange such that the brazed portion provided in the lower en

Abstract: An electromagnetic relay has a movable contact arranged at one end of a drive shaft that reciprocates in an axis center direction based on excitation and demagnetization of an electromagnet block, and a pair of adjacently arranged fixed contacts with which the movable contact is operable to contact and separate. A first electromagnetic iron piece, a second electromagnetic iron piece and the movable contact are inserted to the drive shaft so that the first electromagnetic iron piece and the second electromagnetic iron piece sandwich the movable contact. The second electromagnetic iron piece is biased to one end side of the drive shaft with a coil spring inserted to the drive shaft. When the movable contact contacts to the pair of fixed contacts, the second electromagnetic iron piece forming a magnetic circuit with the first electromagnetic iron piece pushes the movable contact to the pair of fixed contacts.

Abstract: A sealed contact device has a plate-like yoke having a center hole therein, a closed-ended cylinder having an opening edge portion that is integrated with a lower-surface edge portion of the center hole of the plate-like yoke to form a sealed space, an annular flange having an outer peripheral edge portion that is integrally welded to an upper surface of the plate-like yoke, a ceramic case having a lower end surface that is brazed to an upper surface of the annular flange, an electromagnetic unit disposed in an outer periphery of the closed-ended cylinder, a movable iron core that reciprocates in the closed-ended cylinder based on excitation and demagnetization of the electromagnetic unit, a movable shaft having a first end fixed to the movable iron core, a movable contact of a movable touch piece fixed to a second end of the movable shaft, a fixed contact disposed in the ceramic case, and an annular rib projected in the upper surface of the annular flange such that the brazed portion provided in the lower en

Abstract: An electromagnetic relay has a movable contact arranged at one end of a drive shaft that reciprocates in an axis center direction based on excitation and demagnetization of an electromagnet block, and a pair of adjacently arranged fixed contacts with which the movable contact is operable to contact and separate. A first electromagnetic iron piece, a second electromagnetic iron piece and the movable contact are inserted to the drive shaft so that the first electromagnetic iron piece and the second electromagnetic iron piece sandwich the movable contact. The second electromagnetic iron piece is biased to one end side of the drive shaft with a coil spring inserted to the drive shaft. When the movable contact contacts to the pair of fixed contacts, the second electromagnetic iron piece forming a magnetic circuit with the first electromagnetic iron piece pushes the movable contact to the pair of fixed contacts.