| 摘要 |
The present invention relates to a power generation apparatus for a bicycle. In particular, the purpose of the present invention is to provide a power generation apparatus for a bicycle. In the case of pedaling, using two guide bearings, the power generation apparatus is capable of rotating a spider relatively fewer times at a top dead point between at 12 o′clock and 3 o′clock - the range in which a large force is required to rotate the spider connected to a sprocket and is capable of rotating the spider more at a bottom dead point between at 3 o′clock and 6 o′clock - the range in which a force smaller than the force at the top dead point is required. For the above-mentioned effect, a power generation apparatus for a bicycle comprises: a spider fastened to a sprocket to which the chain of the bicycle is connected; a body fixing part with a disc-shaped main shaft boss having an eccentric hole eccentric to the central point of the spider; a main shaft penetrating the main shaft boss through the eccentric hole; a driving part having a guide plate with a main shaft insertion hole in which the main shaft penetrating the first side surface of the main shaft boss is fastened and having two guide bearings guided by two guide holes in the guide plate after mounted on the outer circumferential surface of the spider; a first pedal arm frame fastened to the main shaft on the first side surface; and a second pedal arm frame fastened to the main shaft on the second side surface. |
