Patent ID: 8015934
Filing Date: 2011-09-13
Classification: D05B

Abstract:
1. A thread cutting device of a sewing machine, the sewing machine comprising a needle which moves up and down, a throat plate formed with a needle hole through which the needle passes, and a horizontal shuttle which rotates below the throat plate to form a stitch in cooperation with the needle, wherein the thread cutting device is configured to cut a thread extending between the horizontal shuttle and the needle hole, the thread cutting device comprising: a fixed blade; a first thread catcher configured to catch the thread; a second thread catcher configured to catch the thread and to pull the thread toward the fixed blade to cut the thread; a driving assembly configured to move the first thread catcher and the second thread catcher such that the first thread catcher catches the thread before the second thread catcher catches and pulls the thread; and a guide member disposed between the first thread catcher and the driving assembly, wherein the guide member is configured to guide the first thread catcher from an advanced position to a thread catching position at which the first thread catcher catches the thread, and to further guide the first thread catcher from the thread catching position to a standby position to turn the first thread catcher toward the fixed blade.