| 摘要 |
A wrong insertion preventing mechanism for preventing a connector of a wrong board from being connected to a connector mounted on a mother board on a shelf is disclosed. A guide plate is installed at the opening of the shelf and has plural through holes mutually having different shapes. A guide pin which can be inserted into a specific through hole of the through holes of the guide plate is mounted on a board. The board is inserted in a right position on the shelf by the through hole and the guide pin and is never inserted onto the shelf from a wrong position. The guide pin has a projection at the end and the projection can be set to various angles.
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