| 摘要 |
PROBLEM TO BE SOLVED: To provide a substrate case unit capable of more surely preventing a fraud on a control substrate.SOLUTION: In a substrate case unit, a lock spring 127 is formed into a hollow square cylindrical shape by combining a plurality of elastically deformable leaf spring-like main plate parts 127a in a plate thickness direction. The hollow part has a polygonal cross section, and the main plate part 127a is provided with an engaging groove 127d penetrating the main plate part 127a in the plate thickness direction. A lock member 140 includes: a shaft part 141 extended and inserted into a bottom-side lock hole 126a and a top-side lock hole 133a; and an engaging part 143 provided continuously to one end side in the axial direction of the shaft part 141 and formed to have a diameter larger than that of the inscribed circle of the polygon. When the shaft part 141 of the lock member 140 is extended and inserted into the bottom-side lock hole 126a and the top-side lock hole 133a in a closed state, the engaging part 143 presses the main plate part 127a in the plate thickness direction to elastically deform the lock spring 127 to expand its diameter, whereby the engaging part 143 is inserted into the hollow part to be engaged with the engaging groove 127d. |
