Patent ID: 8893632

Claim:
A thread hooking device for a hemming device of a sewing machine, comprising a swing arm with one end connected to and moved by a drive shaft, and at another end of the swing arm being provided a first hook which is provided at one end thereof with a thread hole for the passage of a thread, an elongated thread groove being formed on a surface of the hook portion and having one end connected to the thread hole, the thread hooking device being characterized in that: in the middle of the first hook is formed a guide portion with a first end and a second end, a thread hooking member is slidably mounted on the guide portion and located at the second end of the guide portion, at one end of the thread hooking member is formed a thread hooking portion, the thread is inserted into the thread groove via the thread hooking portion and then extends out of the thread hole; a thread guiding member moves from the second end of the guide portion to the first end of the guide portion, when the thread hooking is aligned to the first end of the guide portion, the thread is inserted through the thread hole, moving the thread hooking member to the second end of the guide portion makes the thread insert in the thread groove; the top of the guide portion is a saddle portion, and a top of the thread hooking member is a riding portion to ride on the saddle portion.