Waterproof seal for connector and method for forming same

A rubber plug for a waterproof connector comprising:

• a rubber plug body having a tubular construction for passing a wire therethrough, said rubber plug body being adapted to be held in intimate contact with an inner periphery of a cavity of a connector;
• a tubular portion extending from one end surface of said rubber plug body;
• and
• an annular groove axially formed in said end surface of said rubber plug body, said annular groove being disposed around an outer periphery of a proximal end connected to the rubber plug body of said tubular portion.

A method for forming a waterproof seal comprising:

• forming a main waterproof portion;
• forming a wire embracing portion extending from said main waterproof portion;
• and
• providing at least one of said wire embracing portion and said main waterproof portion with means for absorbing bending forces applied to said waterproof seal including an annular groove disposed in an axial direction in said main waterproof portion, said annular groove being disposed around an outer periphery of a proximal end connected to said main waterproof portion of said wire embracing portion.

A waterproof seal for sealing a cavity of a connector, comprising:

• a main waterproof portion contactable with an inner peripheral surface of the cavity;
• a wire embracing portion extending from said main waterproof portion and contactable with an outer periphery of a wire;
• and
• means for absorbing bending forces applied to said waterproof seal including an annular groove axially disposed and formed in a surface of said main waterproof portion, said annular groove being disposed around an outer periphery of a proximal end connected to the main waterproof portion of said wire embracing portion.