An electronic thread clamp and sewing machine

Abstract

The invention provides an electronic clamp, comprising an electromagnet housing, an electromagnet coil installed in the electromagnet housing, an iron core matched with the electromagnet coil, a return spring, a clamping cover fixed to the iron core, The adjusting screw parallel to the iron core, and the adjusting nut threadedly connected with the adjusting screw, the two ends of the return spring are in contact with the electromagnet shell and the iron core respectively, and a gap is formed between the electromagnet shell and the clamping cover to allow the upper thread to pass through. The adjusting nut is arranged on the side of the wire clamping cover facing away from the wire passing slot and abuts against the wire clamping cover. In this application, the size of the thread trough is adjustable. When the thickness of the upper thread and the sewing speed of the first needle of the sewing machine change, the working delay angle of the thread tensioner can be adjusted by adjusting the size of the thread trough, so that the thread tensioner The working delay angle is always kept within a range, thereby realizing the controllability of the working delay angle of the thread tensioner and improving the stability of the working delay angle of the electronic thread tensioner.

Description

technical field [0001] The invention relates to an electronic wire clamp. [0002] The present invention also relates to a sewing machine equipped with the above-mentioned electronic thread gripper. Background technique [0003] At present, electronic thread clamps are usually installed in sewing machines to eliminate the "bird's nest" phenomenon and improve sewing quality; for example, a sewing machine thread clamping mechanism disclosed in the Chinese Utility Model Patent Application No. 201320284505.6, the sewing machine thread clamping mechanism is It is an electronic thread gripper; another example is an electronic thread gripper for sewing machines disclosed in the Chinese Utility Model Patent Application No. 201420557309.6. After the last sewing is finished and the thread is trimmed, and the first stitch is started next time, the electronic thread clamp works to clamp the upper thread between the needle side and the thread supply spool. The needle pierces the materi...

AI Technical Summary

Problems solved by technology

During actual sewing, the thickness of the upper thread and the sewing speed of the first stitch of the sewing machine are constantly changing, which causes the working delay angle of the electronic thread tensioner to be very unstable and uncontrollable, resulting in premature or premature loosening of the thread by the electronic thread tensioner. Night

When the electronic thread clamp loosens the thread too early, the upper thread ends cannot be brought to the back of the sewing material, which affects the appearance of the sewing material; when the electronic thread clamp loosens the thread too late, it is easy to cause the thread to come off , the end of the upper thread comes out of the needle hole of the needle

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