Abstract: The starter motor for a vehicle is capable of achieving a minimum and optimum size of a magnet switch and a starter motor in such a manner that a lever ratio R and an air gap A are improved in a range satisfying a designated moving distance P of a pinion. There is provided an improved starter motor for a vehicle characterized in that an air gap A is set below 8 mm, and a lever ratio R is adjusted above 1.67, whereby a moving distance P of the pinion is about 13 mm. In addition, there is provided an improved starter motor for a vehicle characterized in that the multiplication of air gap A and lever ratio R is below 14 mm, whereby a moving distance P of the pinion is about 13 mm.

Abstract: The present invention relates to a housing assembly structure of a starter motor for a vehicle which is capable of implementing an easier assembling operation of a magnet switch and a lever in a finished assembling line of a starter motor based on a shape change of a housing in a housing with a magnet switch which is attached to a front bracket of a starter motor for thereby operating a lever and decreasing a fabrication cost of a product.