Patent ID: 7509075
Filing Date: 2009-03-24
Classification: G03G

Abstract:
1. A gear unit, comprising: a shaft; a gear supported by the shaft, the gear being capable of rotating and moving along the shaft; a first shaft support member that supports one end of the shaft; a second shaft support member that supports the other end of the shaft, and a stopper supported by the shaft, the stopper disposed between the gear and the second shaft support member, the stopper being capable of moving along the shaft, wherein the stopper is configured such that the stopper does not drop off from the shaft in a case where the stopper moves toward the other end of the shaft in a state where the second shaft support member is not supporting the other end of the shaft, the stopper makes contact with the second shaft support member in a case where the stopper moves toward the other end of the shaft in a state where the second shaft support member is supporting the other end of the shaft, and the gear makes contact with the stopper in a case where the gear moves toward the other end of the shaft.