Omron Corporation

Ikuhiro Yoshihara

Kazuchika Hiroki

Ryuichi Hashimoto

Keisuke Yano

Hiroyuki Iwasaka

Hiroyasu Tanaka

Tomohiro Yamakita

Hideaki Tsuji

Haruki Ayado

Kensuke Kawaguchi

Tomomi Yoshiyama

Tomomi Uchida

An electromagnetic relay includes a movable iron core arranged to move up and down within a center hole of an electromagnet unit formed by winding a coil, and a contact switch where an upper end surface of the movable iron core attaches to and detaches from a lower end surface of a fixed iron core arranged in the center hole according to magnetization and demagnetization of the electromagnet unit and a movable contact attaches to and detaches from a fixed contact by a movable shaft which reciprocates along with the movable iron core where the movable iron core includes a sliding portion which always abuts an auxiliary yoke disposed within a yoke, and where a height dimension of the sliding portion is at least equal to or larger than a plate thickness dimension of the yoke.

Electromagnetic relay

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 end surface of the ceramic case is covered from an inside with the annular rib. The movable contact is brought into contact with and separated from the fixed contact by reciprocating the movable shaft.

Sealed contact device

A contact device has a first yoke having a substantially U-shape, a second yoke bridged over both ends of the first yoke, a spool wound with a coil disposed between the first yoke and the second yoke, a movable iron core inserted into a center hole of the spool in a reciprocating mariner, and a contact mechanism unit formed above the second yoke driven with a drive shaft having a lower end fixed to the movable iron core, which reciprocates based on excitation and demagnetization of the coil, and an upper end projecting out from an upper surface of the second yoke. An insertion hole communicating to the center hole of the spool and through which the movable iron core reciprocates is formed in the first yoke. An annular auxiliary yoke including an insertion hole communicating to the insertion hole of the first yoke and through which the movable iron core reciprocates is provided at a lower surface of the first yoke.

Contact device

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.

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Yamaga, Japan

Ikuhiro Yoshihara