| 摘要 |
PROBLEM TO BE SOLVED: To obtain an injection molding resin gear with high accuracy while suppressing deterioration of gear accuracy resulting from an uneven arrangement of a flow channel connecting to a rim.SOLUTION: At a point where a center line of, among a plurality of connection parts, a connection part abutting on an inner periphery of at least one tooth part abuts on the inner periphery of the tooth part, an angle formed by a tangent line of the inner periphery of the tooth part and the center line is smaller on a larger tooth part region side of tooth part regions neighboring with each other interposing at least one connection part.SELECTED DRAWING: Figure 1 |
