Patent ID: 7306495

Claim:
A terminal crimping structure for crimping a terminal onto an aluminum electric-wire, comprising: an aluminum electric wire including an electric conductor part including numerous strands and a coating part coated on the electric conductor part; a terminal having an open wire barrel to be directly crimped onto said electrical conductor part of said aluminum electric-wire and an insulation barrel to be directly crimped onto said coating part of said aluminum electric-wire, said wire barrel having an aluminum-electric-wire retaining crimp barrel and an aluminum-electric-wire conducting crimp barrel; wherein said aluminum-electric-wire conducting crimp barrel and said aluminum-electric-wire retaining crimp barrel are formed integrally with each other as a wire barrel, a region of said wire barrel having a smaller height corresponds to said aluminum-electric-wire conducting crimp barrel and a region of said wire barrel having a larger height corresponds to said aluminum-electric-wire retaining crimp barrel, when viewed in the terminal crimping direction in the state where said terminal is crimped onto said electric conductor part, said aluminum-electric-wire retaining crimp barrel having a higher value of compressed ratio than said aluminum-electric-wire conducting crimp barrel so as to ensure crimping of said aluminum-electric-wire by said terminal, said compressed ratio defined by (cross-sectional area of aluminum electric-wire conductor part at crimped portion)/(cross-sectional area of aluminum electric-wire conductor part before crimping), and said value of compressed ratio of said aluminum-electric-wire conducting crimp barrel is enough to break an oxide film of said electric wire's conductor part.