Thread winder and sewing machine provided therewith

A sewing machine which includes an arm and a thread winder which winds a thread supplied from a thread spool on a bobbin having flanges on both ends of a cylindrical bobbin shaft respectively, the thread winder comprising:

• a thread winding shaft into which the bobbin shaft is inserted so that the bobbin is detachably attached to the thread winding shaft;
• a rotating mechanism which rotates the thread winding shaft to wind the thread on the bobbin;
• a thread winding shaft switching mechanism which switches a position of the thread winding shaft between a preparatory position where a preparatory work is executed in which a winding start portion of the thread is manually wound by a user on the bobbin attached to the thread winding shaft and a winding position where the thread winding shaft is rotated by the rotating mechanism;
• a guiding member which guides the thread supplied from the thread spool to the bobbin attached to the thread winding shaft so that the thread is wound on the bobbin shaft without detaching to a proximal end side of the thread winding shaft;
• a guiding member position switching mechanism which switches the guiding member between a guide position where the thread is guided to the bobbin shaft and a retreat position where the guiding member is retreated to the proximal end side of the thread winding shaft;
• and
• a link mechanism which links the thread winding shaft switching mechanism and the guiding member position switching mechanism so that the guiding member is located at the guide position when the thread winding shaft assumes the preparatory position and so that the guiding member is located at the retreat position when the thread winding shaft assumes the winding position.

A sewing machine which includes an arm and a thread winder which winds a thread supplied from a thread spool on a bobbin having flanges on both ends of a cylindrical bobbin shaft respectively, the thread winder comprising:

• a thread winding shaft into which the bobbin shaft is inserted so that the bobbin is detachably attached to the thread winding shaft;
• a rotating mechanism which rotates the thread winding shaft to wind the thread on the bobbin;
• a guiding member which guides the thread supplied from the thread spool to the bobbin attached to the thread winding shaft so that the thread is wound on the bobbin shaft without detaching to a proximal end side of the thread winding shaft;
• and
• a guiding member position switching mechanism which switches the guiding member between a guide position where the thread is guided to the bobbin shaft and a retreat position where the guiding member is retreated to the proximal end side of the thread winding shaft.