Integrated presser foot lifting and thread trimming device and sewing machine

Abstract

The invention provides an integrated presser foot lifting and thread trimming device. The integrated presser foot lifting and thread trimming device comprises a presser foot lifting drive mechanism, a thread trimming drive mechanism, a power source, a rotatable coupling shaft, a presser foot lifting driving assembly, a presser foot lifting drive wheel connected with the presser foot lifting drive mechanism, a thread trimming driving assembly as well as a thread trimming drive wheel connected with the thread trimming drive mechanism; when the power source drives the coupling shaft to rotate forwards, the presser foot lifting driving assembly is abutted against the presser foot lifting drive wheel and drives the presser foot lifting drive wheel to rotate to enable the presser foot lifting drive mechanism to act, and the thread trimming driving assembly is separated from the thread trimming drive wheel; when the power source drives the coupling shaft to rotate reversely, the presser foot lifting driving assembly is separated from the presser foot lifting drive wheel, and the thread trimming driving assembly is abutted against the thread trimming drive wheel and drives the thread trimming drive wheel to rotate to enable the thread trimming drive mechanism to act. According to the integrated presser foot lifting and thread trimming device, a foot lifting action and a thread trimming action can be realized in a time-sharing manner only through one power source, so that the overall structure is more compact, the cost of a sewing machine is reduced effectively, and the attractiveness of the sewing machine can be improved.

Description

technical field [0001] The invention relates to a garment sewing device, in particular to an integrated presser foot lifting thread trimming device and a sewing machine. Background technique [0002] At present, most sewing machines are equipped with an automatic thread trimmer and an automatic presser foot lifter to realize automatic presser foot lifter and automatic thread trimmer after each sewing, thereby saving time, reducing labor force and improving work efficiency. figure 1 Shown is the presser foot lifting thread trimming device installed on the sewing machine in the prior art, by figure 1 It can be known that the existing presser foot lifting and thread trimming devices are respectively driven by two electromagnets, that is, the presser foot lifting action is realized by driving the presser foot lifting transmission mechanism with the presser foot lifting electromagnet 100, and the thread cutting action is driven by the thread trimming electromagnet 200 The thread...

AI Technical Summary

Problems solved by technology

Therefore, existing presser foot lifter thread trimming device has the following defects: it has two power sources and two sets of mutually independent transmission mechanisms (i.e. presser foot lifter transmission mechanism and thread trimmer transmission mechanism), a...

Images