An inner pressure foot device of a sewing machine

Abstract

The invention provides an inner pressure foot device of a sewing machine. The inner pressure foot device comprises an inner pressure foot and a wabbler mechanism moving up and down along with a machine needle with the same periods. The inner pressure foot and the wabbler mechanism are mutually connected via a connecting rod mechanism. The connecting rod mechanism is further connected with a moving mechanism driven by a driving source. The connecting rod mechanism comprises a first connecting member and a second connecting member. The first connecting member consists of a first combination connection part, a second combination connection part and a third combination connection part, wherein the first combination connection part is mutually connected with the wabbler mechanism and the second combination connection part is mutually connected with the moving mechanism. One end of the second connecting member is connected with the third combination connection part of the first connecting member and the other opposite end is connected to the inner pressure foot. Thus, the mechanism design of the inner pressure foot device is simplified, so that the size of the whole device can be reduced.

Description

technical field [0001] The present invention relates to an inner presser foot device installed on the headstock of a sewing machine, in particular to an inner presser foot device of a sewing machine for pressing the sewing object when the needle is pulled out from the sewing object held by the outer presser foot. Background technique [0002] Traditional sewing machines that do not use feed teeth to drive the fabric to move are usually equipped with an inner presser foot device to prevent friction between the fabric and the needle, causing the fabric and the needle to rise together and cause skipped stitches. [0003] Generally, when the needle of the inner presser foot device is lowered, once the bottom of the inner presser foot touches the fabric, the inner presser foot will no longer continue to descend with the needle, and will maintain the state of pressing the fabric through the elastic force; When the needle of the fabric starts to rise, the inner presser foot is also...

AI Technical Summary

Problems solved by technology

[0005] However, the inner presser foot device must be composed of the guide member 14 and the connecting rod member 13 formed by two connecting rods arranged in a row, so as to achieve the function of adjusting the height position of the inner presser foot 11, but the additional guide member In addition to the increase in the overall volume of the inner presser device due to the design, the special shape of the guide member will also increase the cost of production. Therefore, it is necessary to improve the above-mentioned deficiencies

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