Patent ID: 7464626

Claim:
A case structure, comprising: a case main body including a case main body connection portion which is disposed at an end of said case main body; a case cover including a case cover connection portion which is disposed at an end of said case cover, said case cover being mounted to the case main body by said case main body connection portion and said case cover connection portion which are brought into confronted contact thereby defining a case main body side and a case cover side corresponding respectively to general positions of said case main body and said case cover; a first torque transmission mechanism being received in the case main body side; a second torque transmission mechanism being received in the case cover side; a rotating member being rotationally supported and transmitting torque between the first and second torque transmission mechanisms; a partition wall sectioning said case main body side from said case cover side, said partition wall including a support portion rotationally supporting the rotating member, said support portion protruding outward from a remainder of the partition wall to extend inward of the case cover; and said case cover, said support portion and the remainder of said partition wall collectively defining an internal space open to the case cover side.