Cable guide structure for window regulator

A cable guide structure for a window regulator comprising:

• rails aligned so as to be parallel with each other, each of said rails being laterally curved;
• moving elements for supporting a window panel, slidably mounted on said rails;
• a cable connected to said moving elements, said cable being moved by a drive unit, said cable being constituted by rail cabling portions provided along said rails and diagonally cabling portions crossing each other between said rails;
• and
• at least one pulley having a cable guide groove formed in a circumferential portion thereof for guiding said cable, said pulley being rotatably mounted on a mounting surface of at least one of said rails,
• wherein at least one of said diagonally cabling portions is linearly arranged,
• a direction of a tangent line of said pulley at a first contact point of said rail cabling portion with said cable guide groove in a plane of rotation coincides with an axial direction of said cable in said rail cabling portion at said first contact point thereof, and
• a direction of a tangent line of said pulley at a second contact point of said linearly and diagonally cabling portion with said cable guide groove in a plane of rotation coincides with an axial direction of said cable in said linearly and diagonally cabling portion at said second contact point thereof.