Patent ID: 8212145

Claim:
A circuit unit accommodation box comprising: a box body having at least one circuit unit accommodating recess into which a circuit unit equipped with a first connector is inserted and an opening formed in an upper-lower partition wall disposed in the at least one circuit unit accommodating recess; a receptacle that is disposed in the circuit unit accommodating recess and that makes an electrical connection with the inserted circuit unit and has a cover with a locking projection that engages the opening formed in the upper-lower partition wall; a second connector accommodated inside the cover such that the second connector mates with the first connector and establishes electrical connection with the first connector when the received circuit unit is inserted into a first position; a release projection for releasing the second connector from the locking projection when the circuit unit is inserted from the first position into a second position further toward the interior withdrawal of the circuit unit after the second connector is released by the release projection; and a securing mechanism on the box body and the circuit unit for holding the circuit unit in the box body when the circuit unit is inserted from the first position to the second position.