Patent ID: 8111469
Filing Date: 2012-02-07
Classification: F16H,G02B,G03B,Y10T

Abstract:
1. A combined gear comprising a pair of gears having a same tooth profile and rotatably combined in a state wherein rotation centers of the gears are coincident, wherein one of said pair of gears comprises an elastic displacement portion that is biased in a direction of rotating an other gear with respect to said one gear, wherein said other gear comprises a positioning portion that positions said other gear with respect to said one gear, and said elastic displacement portion contacts said positioning portion, wherein said elastic displacement includes an arm arcuately extending circumferentially of said one gear, wherein said positioning portion includes a contact surface against which said arm of said elastic displacement portion makes contact, and said contact surface is formed to incline in a direction in which a normal line of a reference pitch circle of said other gear extends, wherein the arm comprises a cylindrical contact pin at an end of the arm, wherein said contact surface comprises a flat surface, and wherein the cylindrical contact pin makes contact with said contact surface in a state of point contact.