Patent ID: 8297212
Filing Date: 2012-10-30
Classification: D05B

Abstract:
1. A travel beginning/end adjusting positioning structure for a sewing machine motor drive mechanism, the sewing machine including a control shaft, on the control shaft being provided a control element, the travel beginning/end adjusting positioning structure comprising: a fixed holder being provided with a fixing portion on an end thereof and fixed on the sewing machine; a positioning holder having an end pivoted on a pivoting element together with the fixed holder, the control shaft being rotatably inserted through the pivot element, the positioning holder being further provided with a positioning portion opposite the fixing portion of the fixed holder, the positioning portion being formed with a through hole, the fixed holder having a side for mounting a motor, on a rotating shaft of the motor being mounted a rotating element, the rotating element being engaged with the control element of the control shaft; and an adjusting apparatus including an adjusting element, a locking element screwed to the adjusting element, and an elastic element, the adjusting element having a head portion and a threaded adjusting shaft extending from the head portion, the locking element being formed with an arc peripheral surface and a threaded hole in the arc peripheral surface, the adjusting shaft of the adjusting element being inserted through the fixing portion of the fixed holder and the through hole of the positioning portion of the positioning folder, the adjusting shaft being screwed into the threaded hole locking element, the arc peripheral surface of the locking element cooperating with the through hole of the positioning portion of the positioning holder, the locking element rotating in an extending direction of the arc peripheral surface, the elastic element being mounted on the adjusting shaft of the adjusting element with both ends of the elastic element pushing against the fixing portion of the fixed holder and the positioning portion of the positioning holder.