Electrical connection box and ground connection structure thereof

A ground connection structure configured to ground the electrical connection box comprising:

• an electrical connection box;
• a bolt;
• and
• a fixing target,
• wherein the electrical connection box comprises:
• an outer box configured to be fixed to the fixing target;
• an inner box configured to be detachably accommodated in the outer box,
• wherein the outer box comprises:
• an outer box body having an accommodation space to accommodate the inner box;
• a first lock portion provided on the outer box body to lock the inner box when the inner box is accommodated in the outer box body;
• and
• a ground member provided on the outer box body and configured to be electrically connected to a ground conductor provided outside the outer box body, the ground member including a first ground contact portion provided at or adjacent to the first lock portion in an exposed manner, and
• wherein the inner box comprises:
• an inner box body in which an circuit base is to be loaded, the inner box body being configured to be detachably accommodated in the outer box body;
• a second lock portion provided on the inner box body and configured to be engaged with the first lock portion of the outer box when the inner box body is accommodated in the outer box body;
• a ground circuit element provided in the inner box body and to which the circuit base is connected to ground the circuit base;
• and
• a contact conductor electrically connected to the ground circuit element and provided on the inner box body, the contact conductor including a second ground contact portion configured to be electrically connected to the first ground contact portion of the outer box when the first lock portion and the second lock portion are engaged with each other,
• wherein the outer box comprises:
• a grounding metal strip extending from the ground member to outside of the outer box body;
• a fixing bracket extending from and provided integrally with the outer box body and enclosing the grounding metal strip;
• and
• a bolt through hole running through a distal end portion of the fixing bracket and to electrically connect the grounding metal strip to the bolt, the bolt to be inserted to fix the outer box to the fixing target,
• wherein the grounding metal strip is to be grounded to the fixing target by inserting the bolt into the bolt through hole of the fixing bracket and fixing the outer box at the fixing bracket to the fixing target with the bolt.