| 主权项 |
1. A gear comprising an inner ring portion, an outer ring portion, and a plurality of spokes connecting the inner ring portion with the outer ring portion, an outer circumferential surface of the outer ring portion being provided with teeth, wherein each spoke comprises a curve-shaped main portion, an inner end section at an inner end of the main portion which connects to the inner ring portion, and an outer end section at an outer end of the main portion which connects to the outer ring portion, and at least one of the inner end section and outer end section is formed with a furcated structure. |
