| 摘要 |
A grommet (10) has a small diameter drum portion (11), a large diameter drum portion (15) and a lip portion (19). A fitting groove (15d) which is fitted into a through hole of a panel is provided on an outer wall surface (15a). The lip portion (19) protrudes to an outer side of the outer wall surface (15a) of the large diameter drum portion (15) so as to contact closely with the panel (9). In the grommet (10), a rear surface side of the large diameter drum portion (15) is thin. Due to a thin-wall portion (15c) which is formed by thinning the rear surface side of the large diameter drum portion (15), upon opening a molding die (30), the lip portion (19) with a large undercut amount elastically deforms to a side of the thin-wall portion (15c). As a result, the grommet (10) can be easily released. |
