Patent ID: 6843189

Claim:
A sewing machine, comprising: a thread tension adjusting device including a thread press member having a first end and a second end, the second end of the thread press member being formed with a release extension portion, the thread tension adjusting device including: (a) a support seat for supporting the thread press member; (b) a secondary thread press member mounted on the support seat; and (c) an elastic member mounted on the support seat to press the thread press member on the secondary thread press member; the support seat having an end portion provided with a wheel shaft and a limit shaft, and the secondary thread press member, the thread press member and the elastic member being mounted on the wheel shaft of the support seat; and, a thread tension releasing device rested and pressed on the release extension portion of the second end of the thread press member of the thread tension adjusting device to pivot the thread press member so as to move the first end of the thread press member.