JPS6276973U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a front view of the present invention, Figure 2 is an exploded perspective view of the main parts, Figure 3A, Figure 3B, Figure 3C,
FIG. 3D is a mechanism diagram sequentially showing one cycle of operation, and FIG. 4 is a mechanism diagram of a conventional mechanism.

Claims (1)

[Claims for Utility Model Registration] A camshaft 7 that is interlocked with the main shaft and rotates at a rotation ratio of 1/2 with respect to the main shaft, an eccentric cam 9 fixed to the camshaft, and a triangular cam 10 fixed to the camshaft. A cam guide 11 is rotatably loosely fitted around the outer periphery of the eccentric cam and has a vertical groove 13 formed therein, and a sliding shaft 3 is supported so as to be slidable in the horizontal direction relative to the sewing machine frame and supports a needle bar support 4 at one end. , an adjustment link 15 whose one end is rotatably connected to the adjustment mechanism and whose connection point is movable and lockable, and whose one end is rotatably connected to the sliding shaft and whose other end is connected to the tip of the adjustment link 15. Rotatably connected connecting arm 17
A vertical shaft whose upper end is rotatably connected to the connecting arm 17, and whose lower end is formed with a horizontal lateral groove 22 that loosely fits around the outer periphery of the triangular cam and a sliding side surface 21 that loosely fits into the vertical groove 13 of the cam guide. Needle swing mechanism for zigzag sewing machine equipped with Rod 20.