Patent ID: 9623688
Date: 2017-04-18
CPC Classifications: B41J,B65H,F16D,F16H

Claim:
1. A driving force transmission apparatus; comprising: a driving member configured to rotate by receiving driving force from a driving source; a driven member configured to concentrically rotate with the driving member by receiving driving force from the driving member; an engaging portion configured to be movably held on the driven member and to be engageable with the driving member; an abutted portion configured to be movably held on the driven member; an abutting member configured to be movable between a contact position at which the abutting member is in contact with the abutted portion and a non-contact position at which the abutting member is not in contact with the abutted portion, wherein the engaging portion separates from the driving member in a case where the abutting member is positioned at the contact position; and a biasing member configured to bias the engaging portion, wherein, when the engaging portion is engaged with the driving member, driving force is transmitted from the driving member to the driven member via the engaging portion, wherein, when the engaging portion is disengaged from the driving member, transmission of the driving force from the driving member to the driven member is stopped, wherein the biasing member is disposed between the engaging portion and the abutted portion, wherein biasing force by the biasing member acts on the engaging portion and the abutted portion in directions in which the engaging portion and the abutted portion are attracted to each other, and wherein, when the abutting member is in contact with the abutted portion and the engaging portion is engaged with the driving member, the biasing member biases the engaging portion in a direction where the engaging portion is disengaged from the driving member.