Fastening device for electronic board

A fastening device for securing an electronic board, comprising:

• a frame case;
• a base unit with an annular polygon shape coupled to said frame case, having a first opening in an upper region of said base unit, a second opening in a lower region of said base unit and a sidewall used to connect said first opening with said second opening for withstanding said electronic board by resilience inducing from an extension portion wherein a plurality of protrusions are located in a surface region of said base unit adjacent to said first opening;
• a position shaft coupled to said base unit, having a first flange in one end of said position shaft, a second flange in an annular edge of said position shaft wherein the size of said first flange is less than that of said first opening and the size of said second flange is more than that of said first opening for leaning against an inner surface region of said first opening;
• and
• a resilient device, coupled to said position shaft and inside said sidewall, for automatically aligning.

A computer having a fastening device for securing an electronic board, comprising:

• a frame case:
• a base unit with an annular polygon shape coupled to said frame case, having a first opening in an upper region of said base unit a second opening in a lower region of said base unit and a sidewall used to connect said first opening with said second opening for withstanding said electronic board by resilience inducing from an extension portion having one end connected said sidewall and the other end being higher than said upper region of said base unit wherein a plurality of protrusions are located in a surface region of said base unit adjacent to said first opening;
• a position shaft coupled to said base unit, having a first flange in one end of said position shaft, a second flange in an annular edge of said position shaft wherein the size of said first flange is less than that of said first opening and the size of said second flange is more than that of said first opening for leaning against an inner surface region of said first opening;
• and a resilient device, coupled to said position shaft and inside said sidewall, for automatically aligning.