| 主权项 |
1. A joint structure comprising:
a first engagement member integral to a first rotation shaft; a second engagement member integral to a second rotation shaft; and an elastic member having an elasticity and disposed between the first engagement member and the second engagement member to transmit a rotational force between the first engagement member and the second engagement member, wherein the first engagement member comprises
a first body integral to the first rotation shaft, andone or more first engagement portions extending from the first body, the second engagement member comprises
a second body integral to the second rotation shaft, andone or more second engagement portions extending from the second body, the elastic member is disposed between the first engagement portion and the second engagement portion in a circumferential direction, when a relative rotation angle between the first engagement member and the second engagement member is less than a predetermined angle, the first engagement portion and the second engagement portion are not in direct contact with each other in the circumferential direction, and the rotational force is transmitted through the elastic member while the elastic member is being elastically deformed, and when the relative rotation angle is equal to the predetermined angle, the first engagement portion and the second engagement portion are in direct contact with each other in the circumferential direction. |
