Matsushita Electric Works, Ltd.

Sds-elektro Gmbh

Sds - Relais Ag

Ikuo Hashiya

Mitsuki Nagamoto

A polarized electromagnet comprises a generally E-shaped yoke including a pair of outer legs and an intermediate leg therebetween, the three legs being interconnected by a base portion, and a coil wound about the intermediate leg. A generally U-shaped armature comprises a permanent magnet and two pole plates attached to both ends of the permanent magnet. The armature is so positioned that each pole plate extends between the intermediate leg and a respective one of the outer legs of the yoke. The armature may be fitted into a generally U-shaped resin member integrally molded with portions extending outwardly to opposite sides of the pole plates and slidable engaged in guide slots provided in the outer yoke legs. When used in an electromagnetic relay, these projecting portions form actuating members engaging movable contacts of the relay.

Polarized electromagnet and polarized electromagnetic relay

An electromagnetic relay comprises a bobbin carrying a coil and having a longitudinal central bore through which an armature extends. A permanent magnet is disposed between the central webs of two generally U-shaped yokes, the legs of the yokes having end portions cooperating with end sections of the armature which project from the central bore of the bobbin. The armature is pivotal about a fulcrum formed near its one end, whereas the other end of the armature carries an actuating card for driving a contact spring disposed at the side, and parallel to, the bobbin. The contact spring is fixed at one end to a first contact terminal and has its other end disposed between two fixed contacts connected to second and third contact terminals. The three contact terminals are disposed along a line generally extending parallel to the bobbin. The coil is connected to two or three coil terminals arranged at the other side of the bobbin along a line which also extends generally parallel to the bobbin. The bobbin with the armature extending through its central bore, the yokes and the permanent magnet are together press-fitted in a recess of a base in which the contact and coil terminals are embedded.

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Osaka, Japan

Ikuo Hashiya