Patent ID: 8028634
Filing Date: 2011-10-04
Classification: D05B

Abstract:
1. A threading device of a sewing machine, the threading device comprising: a threading hook which moves forward to penetrate through an eye of a needle to capture a thread and which moves backward to insert the thread into the eye; a threading shaft which holds the threading hook at a lower end thereof; a threading movement input mechanism from which an operation for causing the threading hook to carry out a threading movement is input; an up-and-down member which moves, in accordance with the operation to the threading movement input mechanism, in up and down directions to rotate the threading shaft; a thread holding mechanism which holds the thread to be inserted into the needle by pinching the thread with a pinching section which is biased by a first elastic member; and a thread releasing mechanism which releases the thread that is held by the thread holding mechanism, wherein the thread releasing mechanism releases the thread when the threading hook is moving backward.