Sewing machine and thread break detection control device thereof

Abstract

The invention discloses a sewing machine and a thread break detection control device thereof. The thread break detection control device comprises a thread clamp, a thread break detection device and acontroller. The thread clamp is arranged on a shell of the sewing machine and provided with a thread picking spring; the thread picking spring is used for cooperating with a sewing thread in normal sewing of the sewing machine to continuously contact with and separate from the thread break detection device, and thread picking spring and the thread break detection device are in a normally contactedstate in breakage of the sewing thread; the thread break detection device is arranged on the shell and used for generating connection signals when contacting with the thread picking spring and generating disconnection signals when separating from the thread picking spring; the controller is connected with an output end of the thread break detection device and used for determining that the sewingmachine is not in thread break after receiving the disconnection signals and determining thread break of the sewing machine after only receiving the connection signals and controlling halting of a driving motor of the sewing machine, wherein connection and disconnection signals include cyclically generated connection signals and disconnection signals. Therefore, automatic halting of the sewing machine after thread break of the sewing machine is realized, and great sewing effects are achieved.

Description

technical field [0001] The invention relates to the field of sewing machines, in particular to a sewing machine thread breaking detection control device and a sewing machine. Background technique [0002] At present, sewing machine is widely used in industrial field, and sewing machine is to use one or more sewing thread, forms one or more stitches on sewing material, makes one or more layers of sewing material interweave or sew up the machine. It can be seen that the sewing machine must rely on the sewing thread to perform normal sewing operations. If the sewing thread breaks, the sewing machine cannot perform normal sewing operations. However, after the thread breaks, the sewing machine will continue to sew a certain distance forward due to inertia before stopping, resulting in poor sewing effect. [0003] Therefore, how to provide a solution to the above technical problems is a problem that those skilled in the art need to solve at present. Contents of the invention ...

AI Technical Summary

Problems solved by technology

It can be seen that the sewing machine must rely on the sewing thread to perform normal sewing operations. If the sewing thread breaks, the sewing machine cannot perform normal sewing operations.

However, after the thread is broken, the sewing machine will continue to sew a certain distance before stopping due to inertia, resulting in poor sewing effect

Images