Patent ID: 7176592

Claim:
A method for forming a stator structure comprising the steps of: (a) forming a first part having a first middle portion with a through hole, and M pieces of extending portions extending from said first middle portion; (b) forming a second part having a second middle portion with a through hole, and N pieces of extending portions extending from said second middle portion; (c) alternately bending said M pieces of extending portions of said first part toward a first direction and alternately bending said N pieces of extending portions of said second part toward a second direction opposite to said first direction, respectively; (d) correspondingly combining said first and second parts together to form said stator structure in which said bent extending portions of said first and second parts constitute an enclosed columnar portion of said stator structure; and (e) winding a coil around said enclosed columnar portion; wherein M and N are even numbers not less than four, respectively, and said bent extending portions of the first and second parts contact one another within the coil.