JPS6348572U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a partial front view showing an embodiment of a zigzag sewing machine embodying this invention, Fig. 2 is a partial front view for explaining its operation, and Fig. 3 is a partial front view for explaining the operation of a conventional configuration. FIG. 4...Fixed axis line, 5...Needle bar support frame, 7...Needle bar, 8...Sewing needle, 9...Rotating body, 12...Connecting rod.

Claims (1)

[Claims for Utility Model Registration] 1. A needle bar support frame 5 which supports a needle bar 7 with a sewing needle 8 attached to its lower end so as to be movable up and down, and which is mounted so as to be swingable around a horizontally fixed axis; a rotating body 9 that is rotationally driven around an axis parallel to the fixed axis;
A connecting rod 12 has one end rotatably connected to the rotating body 9 at a position offset from the rotational axis, and the other end rotatably connected to the needle bar 7 below the one end. In a zigzag sewing machine in which the needle bar 7 is reciprocated up and down by the rotation of the rotating body 9, from the position of one end of the connecting rod 12 at the time when the sewing needle 8 descends and pierces the workpiece cloth W on the surface of the sewing machine bed 3. A zigzag sewing machine characterized in that the horizontal fixed axis is installed below the connecting rod 12 and close to the other end of the connecting rod 12. 2. The needle bar support frame 5 has a pair of support portions 5a for supporting the needle bar 7 at two upper and lower locations, and the horizontal fixed axis is located between the two support portions 5a. A zigzag sewing machine according to claim 1 of the utility model registration claim.