Abstract: A screw-less fixing structure is provided for users to mount the add-on card onto a PC. The screw-less fixing structure comprises a support plate, a rotational pressing plate, a positioning device, and a spring wire. When a user attempts to replace an old add-on card with a new one, he needs only to release the screw-less fixing structure by grasping and pulling the handling portion of the spring wire, replace the old add in card with the new one, and finally tighten the screw-less fixing structure by grasping and pushing the spring wire to reach the tightening state. In the above procedures for replacing the add-on card, the user does not need any additional tool nor screw so that the present invention has the advantages of safe, fast, easy and convenient to use.

Abstract: A screw-less fixing structure is provided for users to mount the add-on card onto a PC. The screw-less fixing structure comprises a support plate, a rotational pressing plate, a positioning device, and a spring wire. When a user attempts to replace an old add-on card with a new one, he needs only to release the screw-less fixing structure by grasping and pulling the handling portion of the spring wire, replace the old add on card with the new one, and finally tighten the screw-less fixing structure by grasping and pushing the spring wire to reach the tightening state. In the above procedures for replacing the add-on card, the user does not need any additional tool nor screw so that the present invention has the advantages of safe, fast, easy and convenient to use.