Abstract: A rotation force transmitter and a rotation force transmission mechanism are provided, which are light-weight and suppresses vibrations in the perimeter and radial directions. A junction flywheel, which is a rotation force transmitter, includes a pulley portion, a hub portion and elastic structures. An inside perimeter of the pulley portion and an outside perimeter of the hub portion are connected by the plurality of elastic structures absorbing vibrations in the perimeter direction and in the radial direction. The elastic structure has an annular member, and the annular member absorbs vibrations and torque fluctuations in the perimeter direction and in the radial direction transmitted from a rotation driving source such as a motor. Therefore, vibrations and torque fluctuations are prevented from being transmitted to a driven flywheel which is a rotated member provided with a rotation force by the motor.

Abstract: An object of the present invention is to provide a rotation force transmitter and a rotation force transmission mechanism, which are light-weight and suppress vibrations in the perimeter and radial directions. A junction flywheel which is a rotation force transmitter includes a pulley portion, a hub portion and elastic structures. An inside perimeter of the pulley portion and an outside perimeter of the hub portion are connected by the plurality of elastic structures absorbing vibrations in the perimeter direction and in the radial direction. The elastic structure has an annular member, and the annular member absorbs vibrations and torque fluctuations in the perimeter direction and in the radial direction transmitted from a rotation driving source such as a motor. Therefore, it is prevented that the vibrations and torque fluctuations are transmitted to a driven flywheel which is a rotated member provided with a rotation force by the motor.

Abstract: An object of the invention is to provide a driving mechanism of a simple structure capable of preventing transmission of vibration generated by a rotative driving source such as a motor to an object to be driven such as a camera. Driving the motor to rotate its output shaft causes a rotating member to rotate. Concurrently an elastic roller rotates and transmits a driving force to a force point section of a driven member. During such operation, since slight vibration generated by the motor is damped absorbed in the roller, the vibration transmitted to the driven member becomes substantially slighter. When the driving force is applied to a force point section the force point section is caused to swing, and concurrently the camera fixed to an action point section is caused to swing. Since transmission of vibration generated by the motor can be prevented, images taken by the camera will not shake.