| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem where the number of mounted connectors decreases for inefficient mounting configuration if a guide mechanism is provided for accurate engagement between a plug-in unit connector and a back panel connector. SOLUTION: Related to a plug-in unit substrate 11, a pin receiving bracket 15 forming a guide hole 16 is fitted to a reinforcing region in a connector mounting region by a fixing screw 14 fixing a plug-in unit reinforcing bracket 13. Related to a back panel substrate 21, a guide pin 24 also acting to fix a back panel reinforcing bracket 23 is fitted to the reinforcing region in a connector mounting region. The guide pin 24 is inserted in the guide hole 16 to guide engagement between a plug-in unit connector 12 and a back panel connector 22 at mounting of the plug-in unit.
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