Patent ID: 6637070
Filing Date: 2003-10-28
Classification: H02G,Y10T

Abstract:
A grommet comprising:a larger-diameter tubular portion having a fitting portion for fitting on a peripheral edge of a through hole; a smaller-diameter tubular portion for passing therethrough a wire penetrating said through hole; a shield wall which interconnects an axially-intermediate portion of said smaller-diameter tubular portion and said larger-diameter tubular portion to close a space between said larger-diameter tubular portion and said smaller-diameter tubular portion, and is elastically deformable so as to displace said smaller-diameter tubular portion in an axial direction thereof relative to said larger-diameter tubular portion; and a noise-insulating wall which is disposed closer to a proximal end of said smaller-diameter tubular portion than said shield wall is, and is flaring into a conical wall-shape in a direction of extending of the proximal end of said smaller-diameter tubular portion, and is joined at the inner peripheral edge thereof to an outer peripheral surface of said smaller-diameter tubular portion; wherein when said smaller-diameter tubular portion is displaced relative to said larger-diameter tubular portion in a direction toward a distal end of said smaller-diameter tubular portion, an outer peripheral edge of said noise-insulating wall is brought into sliding contact with an inner peripheral surface of said larger-diameter tubular portion, and when such the displacement of said smaller-diameter tubular portion is canceled, said outer peripheral edge of said noise-insulating wall is engaged with the inner peripheral surface of said larger-diameter tubular portion, so that said noise-insulating wall is reversed on the inner peripheral edge thereof to be formed into a conical wall-shape whose direction is reverse to that of the initial shape, thereby forming a closed space between said noise-insulating wall and said shield wall.