Nec Corporation

Nec Tokin Corporation

Nec Tokin Iwate, Ltd.

Katsuto Kojima

Tatsumi Ide

Yuichi Kamo

Toshihiro Azuma

Naoto Okihara

Kei Chiba

Masayuki Morimoto

Kazuhiro Ichikawa

Nobuo Mikami

Tsutomu Ono

Matsujiro Ikeda

Naohiro Tanioka

Kouichi Mutou

Keiichi Mori

Akihiro Kaito

To provide an electromagnetic relay having a reduced size, high conductivity, a high insulating performance between two fixed contact terminals and between each of the fixed contact terminals and backstop, a small number of factors causing a failure, and high reliability of electric contact. An electromagnetic relay has an electromagnetic block provided with a movable contact springswung by current flowing in a coil, two fixed contact terminalsandeach having a fixed contact, a backstophaving two movable contact abutment portions, and a base blockfor retaining the above components. The base blockhas a base portionhaving substantially a rectangular shape, fixed contact terminal retaining portionsandextending vertically from two opposing sides of the rectangle so as to retain the two fixed contact terminals, and a backstop retaining portionextending vertically from the center portion of one of the remaining two opposing sides of the rectangle.

Electromagnetic relay

An electromagnetic relay apparatus, which is improved in miniaturization, performance, assembly accuracy, cost reduction, productivity, and reliability. A plurality of electromagnetic relays, each having an NO contact that is closed by applying exciting current to a coil and an NC contact that is closed when the excitation current is not passed through the coil, are arranged in line, one diagonally opposite to the next, on a base so that the respective NO/NC contacts of adjacent electromagnetic relays are located in diagonally opposed positions in substantially point symmetrical relation. The electromagnetic relay includes an electromagnetic block having a couple of moving contacts, a first stationary contact and a second stationary contact both being connectable to external wiring, which are composed of uniform parts or components.

Electromagnetic relay apparatus

An electromagnetic relay includes a spool, a coil wound on the spool, an armature inserted in the through hole of the spool, a yoke fixed to the spool by fitting, hinge springs, a movable spring, a hinge spring fixing portion, an attaching/fixing portion, and at least one terminal. The armature operates upon excitation of the coil. The yoke has first and second opposing upright portions. One end of the armature is in contact with an end face of the first upright portion, and the other end thereof opposes the end face of the second upright portion. The hinge springs set the armature at a predetermined angle with respect to the yoke, and urge one end of the armature against the end face of the first upright portion to ensure magnetic connection. The movable spring has a movable contact and extends from one side of the hinge springs. The movable spring is connected to the armature. The hinge spring fixing portion extends from the ends side of the hinge springs that are not connected to the movable spring, to support them and the movable spring. The attaching/fixing portion attaches and fixes the hinge spring fixing portion on the first upright portion by a single operation. The terminal member is fixed to one end portion of the spool by press fitting and has a stationary contact adjacent to the movable contact.

In a surface mount type leadless electromagnetic relay, movable contacts, movable contact springs, stationary contacts and terminals which are electrically connected to external circuit from coils are formed integrally with a base formed of an insulating material. The terminals are extended to the bottom of the body of the relay. The entire relay has a height and a mounting area which are respectively equal to the height and mounting area of its body.

Surface mount type leadless electromagnetic relay

A polarized electromagnetic relay has a movable block which includes two U-shaped magnetic plates, each of which has first and second ends. The plates are fixed on individually associated and opposite poles of a permanent magnet to oppose each other. A core has one end placed between the two magnetic plates. A yoke is magnetically connected to the core, the yoke having a fork on one end thereof. The fork is placed outside each of the two magnetic plates. A spool with a coil mounted thereon has a center hole through which the core is inserted. The movable block is supported in a manner which enables it to move in a direction which is parallel to the magnetic axis of the permanent magnet.

Polarized electromagnetic relay

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Tokyo, Japan

Katsuto Kojima