Waterproof structure for terminal of wire with terminal fitting

A waterproof structure for a terminal of a wire with a terminal fitting provided with a waterproof block made of resin, the waterproof block covering an end portion of an insulation coated wire coupled to a terminal fitting for electrical connection,

• wherein the terminal fitting comprises
• a disc-shaped connection portion,
• a first barrel portion coupling to a core wire portion of the insulation coated wire projected from an end portion of an outer skin of the insulation coated wire,
• a second barrel portion coupling to the end portion of the outer skin, and
• a bending portion positioned between the connection portion and the first barrel portion;
• and
• the waterproof block comprises
• a waterproof portion covering a coupling portion where the terminal fitting and the end portion of the insulation coated wire are coupled, the waterproof portion adhering to an outer circumferential surface of an end of the outer skin of the insulation coated wire;
• and
• a cylindrical portion projecting cylindrically from the waterproof portion along the outer skin of the insulation coated wire, and
• the waterproof portion comprises
• a small-diameter portion surrounding the end portion of the core wire portion and the first barrel portion, and
• a large-diameter portion surrounding the end portion of the outer skin and the second barrel portion;
• and
• the cylindrical portion has a smaller cross sectional area than the waterproof portion and has rigidity more similar to the outer skin than the waterproof portion in desired bending and torsional directions of the insulation coated wire, and is adhered to an adjacent outer circumferential surface which is adjacent to the outer circumferential surface of the end of the outer skin;
• and
• the cylindrical portion of the waterproof block has a relatively greater hardness than the outer skin.