Patent ID: 7482726

Claim:
A starter for cranking an internal combustion engine, comprising: a direct current motor; a carbon brush that is used in the direct current motor, the carbon brush comprising: a brush body; and a lead wire, one end of which is electrically and mechanically connected to the brush body, and the other end of which is electrically and mechanically connected to a conductor member, wherein: the lead wire is composed of twisted soft copper wire elements, the lead wire having a cross-section larger than 3 mm 2 , each wire element having a diameter smaller than 0.05 mm, the lead wire has a margin length between both ends thereof, the margin length forming a flexure of the lead wire, and an amount of the flexure is predetermined so that a stress applied to the wire element, when a load corresponding to acceleration of 150 G is imposed on the lead wire, does not exceed a permissible fatigue limit of the wire element.