Patent ID: 9042786
Filing Date: 2015-05-26
Classification: F16D,G03G,Y10T

Abstract:
1. A rotation driving force transmitting member disposed between a driving source which is rotated around an axial line, and a driven body, the rotation driving force transmitting member comprising: a concave member provided on one of the driving source and the driven body, the concave member including a concave member including a concave portion, which defines a twisted elliptical space, comprising an elliptical cross-section; and a convex member provided on the other of the driving source and the driven body, the convex member including a convex portion that has a twisted elliptical cross-section and which fits into the twisted elliptical space defined by the concave portion, wherein a rotation driving force of the driving source is transmitted to the driven body via the convex member and the concave member in a state where the convex member is subjected to a drawing force toward the concave member side, due to the rotation of the driving source in a state where the convex portion fits into the concave portion of the concave member.