Patent ID: 8082864

Claim:
A sewing thread spool having thread locking and cutting functions, comprising: a bobbin having a first end a thread cutting plate arranged at the first end of said bobbin; wherein a thread-passing notch is arranged on the first end of the bobbin near the thread cutting plate; and the thread cutting plate comprises a first bayonet socket and a second bayonet socket separated from each other, the first bayonet socket cooperating with the thread-passing notch to produce a tension in a thread applied to the spool, and the second bayonet socket configured for cutting the thread and fixing a thread end; wherein the bobbin comprises: a winding core having a top end and connected between the first end of the bobbin and the thread cutting plate; and an outer rim connected with the top end of the winding core; wherein the thread-passing notch is positioned on an edge of a distal end of the outer rim at a distance away from the winding core.