Internal speed-reduction type starter

Claim 1

An internal speed-reduction type starter which comprises: (a) an armature placed at the inner circumferential side of a stator so as to be rotatable, (b) an armature rotary shaft of a cylindrical form which is fitted to the revolution center part of said armature, (c) a reduction gear device driven at a reduced speed by a gear formed at one end of said armature rotary shaft, (d) an overrunning clutch comprising a first connecting member driven by a rotating part at the output side of said reduction gear device and a second connecting member which allows one-way connection to said first connecting member, (e) an output rotary shaft which passes through said cylindrical armature rotary shaft in a slidable manner in its axial direction to extend from both sides of said armature rotary shaft and which is connected at its one end to said second connecting member of said overrunning clutch through a spline structure, (f) a pinion placed at the other end of said output rotary shaft, and, (g) an electromagnetic device for causing said pinion to move in the axial direction.