Mitsubishi Denki Kabushiki Kaisha

Tutomu Kazama

Satoru Hayashi

Hiroyuki Nakajima

Takashi Takahama

Einosuke Adachi

Kikuo Sakita

Printed circuit boards with busbars for providing large current interconnections are disclosed. The printed circuit board 6 has through holes through each of which a cylindrical fixture member 12 having a top nut portion 12b extends to be secured to the board 6 by means of the bottom flange 12p and the radial outward extension 12a formed by a pressing or caulking step. Each one of the leads 4 of circuit elements 3 has a pin-shaped end portion having a male thread 4a formed thereon which engages with the nut portion 12b of a fixture member, wherein the pin-shaped portion 4a of each lead extends through a through hole formed in the busbars 1 so that the busbars 1 are securely held between the fixture members 12 and the stoppers (radial extensions) 4b formed at the base of the pin-shaped portions 4a of the leads 4. Alternatively, the busbars 1 are held between two radial outward extensions 12a and 12A of each one of the fixture member (FIG. 5), or are held together with the board 6 between the flange 12p and the radial extension 12a thereof (FIG. 9). The busbars may be bent and deformed to realize a three-dimensional busbar interconnection pattern (FIG. 10).

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Nagoya, Japan

Tutomu Kazama