Fixation Confirmation Mechanism for Maintenance Parts

Sensor dog position adjustment using a spring hinge.
Prevents maintenance door from failing to close or lock.
After closing the maintenance door, secure the bracket connected to the spring hinge with the anti-fall knurled knob.
Part of the bracket is blocked by the open/close confirmation sensor.
When the knurled knob that holds the door in place is removed, the bracket and knurled knob spring up with the spring hinge, cutting off the light from the open/close confirmation sensor.