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Knee rest and presser foot lifting device for sewing machine

A sewing machine and presser foot lifting technology, applied in the field of clothing manufacturing equipment, can solve the problems of easy damage, frequent damage, unreasonable transmission structure design, etc., and achieve the effects of reducing the risk of damage, being sensitive in response, and having obvious resistance changes.

Active Publication Date: 2021-10-15
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the above patent documents, the drive source assembly is used to lift the presser foot automatically, but due to the unreasonable design of the transmission structure, frequent and high-speed presser foot lifts are prone to damage and other faults

Method used

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  • Knee rest and presser foot lifting device for sewing machine
  • Knee rest and presser foot lifting device for sewing machine
  • Knee rest and presser foot lifting device for sewing machine

Examples

Experimental program
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Embodiment Construction

[0035] The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

[0036] Such as figure 1 and figure 2 As shown, the sewing machine includes a compression rod 1 and a small presser foot 2 arranged at the lower end of the compression rod 1. A compression spring 3 is sleeved on the compression rod 1. The lifting front lever 4 and the lifting pull rod 5 that drives the lifting front lever 4 to swing, the end of the lifting pull rod 5 is connected with the lifting rear lever 6, and the presser foot lifting device also includes an electromagnet 7 that can drive the lifting rear lever 6 to swing, a rotatable Knee control hinge shaft 8 and the knee plate 11 that pushes the knee control hinge shaft 8 to rotate, the output shaft of the electromagnet 7 is connected with the middle part of the li...

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Abstract

The invention provides a knee presser foot lifting device of a sewing machine, which belongs to the technical field of garment manufacturing equipment. The utility model solves the technical problems such as the easy damage of the existing knee presser foot lifting device. The sewing machine includes a pressing rod and a small presser foot arranged at the lower end of the pressing rod. A pressing spring is sleeved on the pressing rod. The presser foot lifting device includes a lifting front lever and a lifting rod which drives the swinging of the lifting rod. The end is connected with a lifting rear lever, and the presser foot lifting device also includes an electromagnet, a knee control hinge shaft and a knee rest plate. A varistor is connected, a limit frame is also connected to the knee control hinge shaft, and a jacking assembly is arranged between the limit frame and the lifting lever; the end of the jacking assembly is connected with the end of the lifting lever. The knee presser foot lifting device in the present invention is more labor-saving and less prone to damage.

Description

technical field [0001] The invention belongs to the technical field of garment manufacturing equipment, and relates to a sewing machine, in particular to a knee rest presser foot lifting device of the sewing machine. Background technique [0002] A sewing machine is a machine that uses one or more sewing threads to form one or more stitches on the sewing material to interweave or sew one or more layers of sewing material. The sewing machine can sew fabrics such as cotton, fiber crops, silk, wool, and artificial fibers, and products such as leather, plastics, and paper. The presser foot is an important part on the sewing machine. The working process of the sewing machine needs to lift the presser foot of the sewing machine. At present, the sewing machine has two modes of operation, manual and automatic, to lift the presser foot. The manual presser foot lift method is to manually drive the corresponding manual transmission mechanism to lift the presser foot, and the automatic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B29/02
CPCD05B29/02
Inventor 金丰东黄忠亮李军飞鲁亚东
Owner JACK SEWING MASCH CO LTD
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