Patent ID: 8608156
Filing Date: 2013-12-17
Classification: B65H,F16H

Abstract:
1. A drive switching mechanism for switching between transmission and non-transmission of a driving force from an input gear to an output gear, the drive switching mechanism comprising: a transmission gear configured to transmit a drive from the input gear to the output gear; a planetary gear configured to transmit a drive from the input gear to the output gear; a swinging member configured to hold the planetary gear such that the planetary gear can swing around the input gear and can engage with the output gear; a retaining unit configured to retain the swinging member in either one of a state in which the swinging member can swing and a state in which the output gear and the planetary gear are not engaged; and a releasing unit configured to disengage the planetary gear from the output gear, wherein the output gear includes a toothless part that does not engage with the transmission gear and that does not receive a drive from the transmission gear, the retaining unit retains the swinging member such that the swinging member can swing in a state in which the transmission gear and the output gear are disengaged by the toothless part, the input gear is driven in a rotational direction so that the planetary gear engages with the output gear and rotates the output gear, and after the toothless part is passed and the transmission gear and the output gear become engaged, the releasing unit disengages the planetary gear from the output gear while the input gear rotates in the rotational direction.