Patent ID: 7281479
Filing Date: 2007-10-16
Classification: D05B

Abstract:
1. A needle threading device of a sewing machine comprising: a needle threading shaft provided rotatably and vertically movably to a needle bar base and provided in close proximity to a needle bar; a needle threading hook which is fixed to a lower end of the needle threading shaft and which is capable of passing through an needle eye of a sewing needle; a rotating mechanism that rotates the needle threading shaft such that the needle threading hook passes through the needle eye of the sewing needle when the needle threading shaft is lowered to a substantial lowermost position thereof; a first thread guide member which is fixed to the lower end of the needle threading shaft and which is arranged to an opposite side of the needle threading hook with respect to the needle threading shaft; a second thread guide member which is pivotally mounted on the lower end of the needle threading shaft and which is linked to the first thread guide member via a link mechanism, whereupon in rotation of the needle threading shaft, the second thread guide member retains an upper thread in a predetermined position near the needle eye of the sewing needle cooperatively with the first thread guide member; and a thread retaining unit provided on the second thread guide member that retains the upper thread at the time of hooking the upper thread by cooperating with the second thread guide member.