Meidensha Corporation

Masahiko Ieda

Toshimasa Fukai

Daizo Takahashi

In case of using multi-contacts or flat braided wires for constituting a current carrying structure of a movable part in a vacuum relay, problems tend to appear, which are enlargement of a control mechanism, complication, increased operation force and the like. The vacuum relayincludes an insulating cylinder, a first relay connecting portionthat is connected to one open end of the insulating cylinderand has on its inner surface a first contact, a second relay connecting portionthat is arranged in the insulating cylinderto face the first relay connecting portion, a movable memberthat is movably arranged between the first and second relay connecting portionsandand has a second contact that is brought into contact with the first contact when the movable member is moved toward the first relay connecting portion, and a control mechanismthat moves the movable memberin both directions to establish and break the contact between the two contacts. Between the movable memberand the second relay connecting portion, there is provided a bellowsthrough which the movable memberand the second relay connecting portionare electrically connected.

Sealed relay

Conventional example is arranged simply to turn a circuit on/off, and not to changeover connection. Sealed relaycomprises: insulating tube; first relay connect portionattached to one end of insulating tube, and provided with first contacton inside surface; second relay connect portiondisposed in confrontation with first relay connect portionin insulating tube; movable memberdisposed movably between first and second relay connect portionsand, and provided with second contactcontacting with first contactwhen moved toward the first relay connect portion; and operating mechanism to move the movable member. Third relay connect portionincluding third contactis provided between the second and first relay connect portions. Movable memberincludes a fourth contact contacting with the third contact when the first and second contacts are out of contact from each other.

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Mishima, Japan

Masahiko Ieda