Retaining structure of O-ring

摘要

A retaining structure for a flexible O-ring which is used for sealing a gap between an electrical device and an electrical connector to be mounted directly on an electrical device, comprises a pressing projection provided on an inner peripheral wall of an O-ring-receiving groove for a connector housing, and a notch portion provided for an outer peripheral wall of the O-ring-receiving groove on the opposite side of the pressing projection, wherein an O-ring inserted into the O-ring-receiving groove is held by engagements by contacting portions defined by a pointed end of the pressing projection and oppositely disposed contacting portions P1 and P2 on an outer peripheral wall.