| 摘要 |
PROBLEM TO BE SOLVED: To provide a gear capable of improving bonding strength of a synthetic resin annular member and a metallic core member. SOLUTION: In a helical gear 10 equipped with a synthetic resin annular member 21 containing a tooth 21a in the outer periphery and a metallic core member 22 bonded to the inside of the annular member 21 by insert-molding. The core member 22 consists of a disk part 22a the center of which has a fitting hole 22b fitting an output shaft 17 and a plurality of protrusions 22c, 22d protruded in a radial direction from the outer peripheral part of the disk part 22a and bent in an axial direction. The protrusion 22c bent at a substantially right angle in a position having a longer distance from the center O of the disk plate 22a in a plurality of protrusions 22c, 22d and the protrusion 22d bent at a substantially right angle in a position having a shorter distance from the center O of the disk plate 22a are respectively arranged in a staggered state. COPYRIGHT: (C)2007,JPO&INPIT
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