| 摘要 |
<p>THREAD ROUTING MECHANISM FOR SEWING MACHINE A thread routing mechanism for sewing machine includes a cylindrical needle bar case having a rotation axis and holding multiple spaced needle bars that are equally distant from the rotation axis and respectively carry a needle having an eye; a locating disk moving synchronously with the needle bar case and having multiple thread guide holes spaced around the rotation axis; and a thread take-up lever having a thread take-up end with multiple thread holes and movable upward and downward in a space directly above the needle bar case. Each thread hole together with a corresponding thread guide hole and a corresponding eye define a thread course, such that threads respectively routed through the thread courses have the same length even when the needle bars are changed from one to another. A thread pinching unit is also included to pinch or release the threads in or from the thread guide holes. Fig. 2</p> |
