Thread clip apparatus for sewing machine

Abstract

The present invention provides a thread clip apparatus(1)for sewing machine, which comprises a tension release mechanism(3)capable of releasing the tension applied to sewing thread independent of the action of the thread-severing device(presser foot raising device), wherein the tension release mechanism(3)comprises a release member(31)entering between a pair of clamps(2, 2)clamping and holding sewing thread to release the holding of the sewing thread, a driving member(32)interlocked with the thread-severing device(presser foot raising device)(5)to move the release member(31), an ejection member for ejecting the release member(31). The release member(31)comprises an joint part(31d)against jointed with the driving member(32), a moving guide part(31e)for guiding the release member(31)to the position where the holding of the sewing thread is released during moving the release member(31). Thus, the tension release mechanism can be driven independently even when the thread-severing device(presser foot raising device)is connected with the tension release mechanism.

Description

technical field [0001] The invention relates to a thread clamping device of a sewing machine. Background technique [0002] On the sewing machine, there is a thread clamping device that uses a spring to push two clamping plates toward each other, and clamps the yarn between these clamping plates to apply tension to the yarn. The thread clamping device is equipped with a tension release mechanism that overcomes the pushing force of the spring to separate the two clamping plates, and can release the tension given to the yarn as required. [0003] The tension release mechanism is connected to, for example, an operation lever that presses the presser foot of the object to be sewn placed on the needle plate. The tension release mechanism releases the tension applied to the yarn in conjunction with the operation of the operating lever. Specifically, the tension release mechanism operates when the presser foot needs to be raised to release the tension of the yarn (for example, re...

AI Technical Summary

Problems solved by technology

[0014] However, in the invention described in Patent Document 2, although the above-mentioned problem can be solved by abolishing the interlocking operation of the operation lever of the presser foot and the tension release plate 102, a separate drive mechanism is required to drive them separately, and when the presser foot is lifted, a separate drive mechanism is required. It is necessary to release the control of the yarn tension during operation or thread cutting operation, so it will inevitably lead to an increase in cost such as an increase in parts and an increase in the production process.

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