Valve timing control apparatus for internal combustion engine

A valve timing control apparatus for an internal combustion engine, the internal combustion engine including a crankshaft and a camshaft to drive an exhaust valve, the valve timing control apparatus being disposed on the camshaft, the valve timing control apparatus comprising:

• a drive rotation member to which rotation of the crankshaft is transmitted;
• a follower rotation member fixed to the camshaft;
• an electric motor serving to change a relative rotational phase of the drive rotation member and the follower rotation member;
• a torsion spring accommodated in an annular accommodation space having an axial closed end which is formed between an inner periphery of the drive rotation member and an outer periphery of the follower rotation member, the torsion spring having one end connected to the drive rotation member and the other end connected to the follower rotation member;
• and
• a stop plate fixed to the drive rotation member so as to cover a part of an axial open end of the annular accommodation space, the stop plate cooperating with the follower rotation member or the camshaft to restrict relative rotation of the drive rotation member and the follower rotation member within a predetermined angular range.