THREAD TAKE-UP LEVER SWITCHING MECHANISM AND SEWING MACHINE

The present invention provides a thread take-up lever switching mechanism and a sewing machine capable of changing only a part of the operation process of forming the seam and performing the adjustment optimally in accordance with the thickness of the sewing object. A thread take-up lever switching mechanism 2 can switch the operation of a thread take-up lever 9 which is interlocked with an upper shaft 3. The thread take-up lever switching mechanism 2 includes: a cylindrical cam 10 provided on the upper shaft 3, the cylindrical cam 10 having a plurality of cam surfacesOb, 1Oc; a contact portion 9c provided on the thread take-up lever 9, the contact portion 9c contacting a first surface of the plurality of cam surfaces 1Ob, 1Oc; and a switch 12 for switching the contact portion 9c from a first position of contacting the first surface of the plurality of cam surfaces 1Ob, 1Oc to a second position of contacting a second surface of the plurality of cam surfaces 10b, 10c. Fig. 2 UP (+Z) 2 left (-Y) front (+X) rear (-X) right (+Y) 12b down (-Z) 12a 3 3a 9b 9a 9 9d 9c