| 摘要 |
<p>A gear (27; 27A; 27B; 27C) includes: an annular metal core (28; 28A; 28B) having a recess (37; 67: 37B) provided in a first side face (34) thereof; and an annular resin member (29) molded on the metal core (28; 28A; 28B) as covering an outer peripheral surface (32) of the metal core (28; 28A; 28B) and the first side face (34) of the metal core (28; 28A; 28B) and having teeth (46) provided on an outer peripheral surface thereof by injecting a resin material toward the recess (37; 67; 37B).</p> |
