Presser foot height adjusting device of sewing machine

Abstract

The invention provides a presser foot height adjusting device of a sewing machine, and belongs to the technical field of machines. The problem that an existing presser foot height adjusting device is troublesome to adjust is solved. The device comprises an adjusting rod, a connection pin, a first connection rod, a second connection rod and an elastic part which are arranged in a machine body, wherein the second connection rod is parallel to the first connection rod. One end of the first connection rod and one end of the second connection rod are arranged on the connection pin in a sleeving mode. The other end of the first connection rod is provided with a protruding limiting portion, the outer end of the adjusting rod extends out of the machine body, the inner end of the adjusting rod is provided with an adjusting block, the adjusting block is located below the end, provided with the limiting portion, of the first connection rod, a driving part comprises a driving sleeve arranged on an upper shaft eccentrically, a driving rod and a driving block fixed to a driving shaft. A pivot is arranged on the driving sleeve in a penetrating mode, one end of the driving rod is fixed to the pivot, the other end of the driving rod is fixed to the driving block, and the end, not in sleeved connection with the connection pin, of the second connection rod is in sleeved connection with the pivot. The presser foot height adjusting device has the advantages that adjusting is more convenient, and time and labor are saved.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to an adjusting device of a sewing machine, in particular to a device for adjusting the height of a presser foot of a sewing machine. Background technique [0002] At present, in order to prevent the fabric from rising with the needle due to friction with the needle and causing interference to sewing, every industrial sewing machine is equipped with a presser foot assembly. When the needle bar leaves the fabric and rises, the presser foot assembly is used to push the fabric down Press to prevent the needle from lifting the fabric up, and after the needle is completely separated from the fabric, the presser foot assembly will rise together with the needle bar. The lifting height of the presser foot assembly in the early industrial sewing machines was fixed and could not be adjusted. However, with the continuous improvement of industrial sewing machine technology, there are also requi...

AI Technical Summary

Problems solved by technology

[0004] Although this sewing machine realizes the adjustable lifting height of the presser foot, it also has some shortcomings: the lifting height of the presser foot is to change the connection position between the front end of the ring member and the arc hole by making the pin slide along the arc hole to adjust, but the ring-shaped member is set in the casing of the sewing machine, and the whole casing of the sewing machine needs to be dismantled before adjustment can be made. It must be relatively locked during the swinging process, so when adjusting, not only the casing of the sewing machine must be removed first, but also the pin needs to be loosened, and then the user controls the pin to move along the arc hole to adjust. This causes the adjustment of the lifting height of the entire presser foot to be very cumbersome and laborious, and it will take a lot of time for the user to remove and reinstall the casing of the sewing machine

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