Daiichi Denshi Kogyo Kabushiki Kaisha

Masaru Ishii

Susumu Nakagawa

A miniature switching unit including two fixed contact pieces arranged one above the other and fixed to terminals, respectively, and a movable contact piece. Each of the fixed contact pieces is made of springy wire members and includes parallel portions having equal inner distances, respectively. The movable contact piece in the form of a rod having a thickness slightly larger than the inner distances of the parallel portions of the fixed contact pieces and includes an intermediate insulator, an upper conductor axially, concentrically and integrally connected to the upper end of the intermediate insulator and a forward conductor axially, concentrically and integrally connected to the lower end of the intermediate insulator. The movable contact piece is held in a housing so as to be positioned in and contacting the parallel portions of the first and second fixed contact pieces and movable in a manner that the intermediate insulator moves across any one of the first and second fixed contact pieces, which are arranged one above the other.

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Tokyo, Japan

Masaru Ishii