Needle threader of sewing machine and sewing machine

摘要

A needle threader includes a needle bar supporter to which a needle bar holding a needle with a needle hole is attached, a threader shaft supported in a movable manner in a vertical direction and in a rotatable manner, a thread holding mechanism and a threader mechanism which is held by the threader shaft and which comprises a threader hook. The threader hook includes a capturing portion that captures the thread at a tip part of the capturing portion. The capturing portion includes a thread pathway and a thread capturing space. A width of a part where the thread pathway becomes the narrowest is formed so as to be narrower than a width of the thread capturing space. The thread enters or leaves the thread pathway in a tensioned condition, and the width of the part where the thread pathway becomes the narrowest is formed.

主权项

1. A needle threader of a sewing machine, the needle threader comprising:
a needle bar supporter to which a needle bar holding a needle with a needle hole is attached; a threader shaft supported in a movable manner in a vertical direction and in a rotatable manner; a thread holding mechanism which is held by the threader shaft and which applies a tension to a thread so as to be substantially horizontal ahead of the needle hole; and a threader mechanism which is held by the threader shaft and which comprises a hook that enters the needle hole upon a rotation of the threader shaft, wherein: the hook comprises a capturing portion that captures the thread at a tip part of the capturing portion; the capturing portion comprises a thread pathway where the thread enters or leaves, and a thread capturing space for capturing the thread; and a width of a part where the thread pathway becomes the narrowest is formed so as to be narrower than a width of the thread capturing space, wherein
the thread enters the thread pathway in a tensioned condition, andthe width of the part where the thread pathway becomes the narrowest is formed so as to be narrower than an outer diameter of the thread not in a tensioned condition.