Patent ID: 7357089
Filing Date: 2008-04-15
Classification: D05B

Abstract:
1. An automatic thread cutting device of a sewing machine comprising: a main body; an active piece; a driving piece; a passive piece; an interlocking piece; a thread hooking member; and a knife; wherein said active piece being droved by said driving piece and engaging with said passive piece which motivating said interlocking piece, and said interlocking piece actuating said thread hooking member, said knife cooperating with said thread hooking member to cut a needle thread; said active piece having a worm gear rod of active part, said active piece being actuated by said driving piece and engaging with said passive piece; said passive piece having a passive part relative to the active part of said active piece and motivating said thread hooking member; and said knife equipping on a moving course of said thread hooking member.