Patent Number: 7,785,716

Title: Insert-molded article, insert mold and insert molding method

Abstract: A bearing apparatus includes a coil spring having a center portion in which a wire is wound at a predetermined pitch, and end turn portions arranged at both end portions of the center portion. Each of the end turn portions is formed by winding the wire at least three turns with a pitch which is smaller than the predetermined pitch of the center portion. A bearing member has a main body with an opening for supporting a shaft, and a connecting portion for connecting the coil spring to the main body. The main body and the connecting portion are integrally formed from a resin material by molding, and the end turn portion of the coil spring is connected to the connecting portion through molding of the main body and the connecting portion. The connecting portion of the bearing member has an inner connecting portion which protrudes into an inside of the end turn portion of the coil spring, and an outer connecting portion which surrounds an outside area of the end turn portion of the coil spring.

Inventors: Sasatani; Yoshiaki (Ibaraki, JP), Toda; Hiroshi (Ibaraki, JP), Uematsu; Katsushige (Chiba, JP)

Assignee: Canon Kabushiki Kaisha

International Classification: B29C 33/12 (20060101)

Expiration Date: 8/31/12018