Patent ID: 8733197
Filing Date: 2014-05-27
Classification: F16H,G03G,Y10T

Abstract:
1. A driving force transmission mechanism, comprising: a first support portion for supporting an end portion of a rotation shaft of a rotation member on a side provided with a gear; a second support portion arranged opposite to the rotation member across the first support portion; a support shaft provided so as to protrude from the second support portion to the rotation member side; and a multi-step gear rotatably supported by the support shaft, for transmitting a rotation driving force from drive means to the gear provided onto the rotation shaft, the multi-step gear comprising a plurality of gear portions arranged adjacent to one another in an axial direction of the support shaft and rotating together, and a flat peripheral surface portion which is formed between at least two gear portions of the plurality of gear portions and which is rotatably supported by a bearing member provided into a through-hole of the first support portion.