Patent ID: 7033215
Filing Date: 2006-04-25
Classification: H01R

Abstract:
1. A sealing plug for a watertight connector, the sealing plug being formed with at least one wire insertion hole through which a wire is to be inserted, and being at least partly insertable into a cavity of a connector housing to provide a watertight sealing between an inner wall of the cavity and the wire, the cavity having a selected inside diameter and the wire having a selected outside diameter, wherein: at least one outer lip is formed on an outer surface of the sealing plug for contact with the inner wall of the cavity and at least one inner lip is formed on an inner surface of the sealing plug for contact with the wire, the inner and outer lips having substantial identical sizes and shapes when viewed along a cross-section taken centrally through the wire insertion hole before the seal is mounted on the wire and in the cavity, the outer lip having an outside diameter and the inner lip having an inside diameter, the outside diameter of the outer lip and the inside diameter of the inner lip being selected relative to the inside cross-sectional dimension of the cavity and the outside diameter of the wire so that a degree of deformation of the outer lip is larger than a degree of deformation of the inner lip for achieving a frictional resistance between the inner wall of the cavity and the sealing plug that is larger than a frictional resistance between the wire and the sealing plug, and so that the frictional resistance between the wire and the sealing plug is set to permit a movement of the wire relative to the sealing plug when the wire is caused to move.