Needle threading device for sewing machines

A needle threading device for a sewing machine having a needle bar with a needle eye attached at the lower end thereof, said needle threading device moved between an upper inoperative position and a lower operative position in which said threading device is manually operated to pass a thread into the needle eye, comprising mounting means arranged adjacent to the needle bar;

• slide means mounted on the mounting means for sliding movement in a vertical direction, said sliding means having an operating part which is manually accessible:
• guide means turnably mounted on the slide means carrying an instrument manually operated to insert a thread into the needle eye from one side to the other side thereof;
• means cooperating with the needle in a predetermined position to determine a lateral position of the guide means relative to the needle eye during the downward sliding movement of the guide means from the inoperative position to the operative position;
• means cooperating with a part of the needle bar to determine a vertical position of the guide means relative to the needle eye during the sliding movement of the guide means from the inoperative position to the operative position;
• and hook means mounted on the guide means to draw out, on the other side of the needle eye, the thread inserted into the needle eye by the thread inserting instrument during the sliding movement of the guide means from the operative position to the inoperative position.