Patent Number: 6,250,962

Title: Sealing plug for a watertight connector and a watertight connector

Abstract: A one-piece type waterproof rubber plug 30 is formed with round insertion holes 32 whose inner surfaces can be held in sealing contact with the outer surfaces of a plurality of wires 18 individually inserted into the insertion holes 32 to protect them from water. Female terminal fittings 14 having a box-shaped connection portion 15 are introduced into the insertion holes 32. In the inner surfaces of the insertion holes 32 are formed slits 50 in positions corresponding to corner portions 16 of the connection portions 15. While the female terminal fittings 14 are passing the insertion holes 32 by deforming them, the corner portions 16 enter the slits 50, thereby forcibly opening the slits 50 wider to form clearances 51. The corner portions 16 advance along the clearances 51. This prevents the corner portions 16 from damaging or scratching the inner surfaces of the insertion holes 32. After the passage of the female terminal fittings 14, the insertion holes 32 elastically narrow to close the clearances 51, with the result that the lips 33 are held in sealing contact with the outer surfaces of the wires 18. The insertion holes may include guides (140) for passage of terminal stabilizers (25). The guides (140) include closed sealing slits (150) to be forced open by passage of the stabilizers.

Inventors: Shinozaki; Tetsuya (Yokkaichi, JP)

Assignee: Sumitomo Wiring Systems, Ltd.

International Classification: H01R 13/52 (20060101); H01R 13/502 (20060101); H01R 13/506 (20060101); H01R 013/40 ()

Expiration Date: 06/26/2018