| 摘要 |
PROBLEM TO BE SOLVED: To lighten the load on back panel and process signals at a high speed. SOLUTION: This structure comprises a back panel 51, a plurality of rear-side printed wiring boards 52, which are mounted to the rear of the back panel 51 by means of connectors, and a plurality of front-side printed wiring boards 53 which are inserted into a shelf from the front side and are connected with the back panel 51 by means of connectors. The front-side printed wiring board unit 53 is arranged in a direction of X1-X2 in an attitude in which it is in the vertical plane as a Y-X plane. It is vertical and the rear-side printed wiring boards 52 are horizontal, and both cross each other orthogonally. The rear-side printed wiring boards 52 are provided with wiring patterns 71, and they are plurally arranged in a direction of Z1-Z2 in an attitude, where they are in the horizontal plane as an X-Y plane. As a result, wiring patterns exceeding the maximum number of wiring patterns that can be provided by the back panel 51 itself are provided. |
