A kind of sewing machine with new automatic presser foot lifting structure

A technology for lifting presser foot and sewing machine, which is applied in the field of sewing machines with a new automatic presser foot lifting structure, can solve problems such as torque increase, and achieve the effects of reducing energization current, simple structure and convenient modification.

Active Publication Date: 2019-05-10
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing holding force mechanism can only provide torque in one direction and the torque gradually increases with the lifting of the presser foot

Method used

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  • A kind of sewing machine with new automatic presser foot lifting structure
  • A kind of sewing machine with new automatic presser foot lifting structure
  • A kind of sewing machine with new automatic presser foot lifting structure

Examples

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Embodiment Construction

[0036] The following are specific embodiments of the present invention and in conjunction with the attached Figure 1-14 , to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0037] like Figure 1-5 As shown, a sewing machine with a novel automatic presser foot lifting structure includes an automatic presser foot lifting device 1, and the outer frame 3 of the presser foot electromagnet 2 of the automatic presser foot lifting device 1 is provided with a holding device. The holding device leans against the outer wall of the presser electromagnet core 4 when the presser electromagnet core 4 is stretched out, and is clamped on the end face of the presser electromagnet core 4 when the presser electromagnet core 4 is attracted superior. When the presser foot electromagnet 2 of the present embodiment is not energized, it is in an extended state. At this moment, the holding device leans against the ou...

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PUM

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Abstract

The invention belongs to the technical field of sewing equipment and particularly relates to a sewing machine with a novel automatic pressing foot lifting structure. The sewing machine comprises an automatic pressing foot lifting device, an outer frame of a pressing foot electromagnet of the automatic pressing foot lifting device is provided with a maintaining device, and the maintaining device abuts against the outer wall of a pressing foot electromagnet core when the pressing foot electromagnet core extends out. The maintaining device is clamped on the end face of the pressing foot electromagnet core when the pressing foot electromagnet core is sucked. Through joint matching of the maintaining device and an auxiliary mechanism, on the premise of keeping the process time unchanged, force lost due to current decrease is supplemented, an electrified current is reduced, the heating quantity is effectively controlled, the temperature is reduced, and it is guarantee that a pressing foot electromagnet finishes pressing foot lifting motion normally.

Description

technical field [0001] The invention belongs to the technical field of sewing equipment, in particular to a sewing machine with a novel automatic presser foot lifting structure. Background technique [0002] At present, the automatic presser foot lifting technology of the sewing machine is realized through the rear presser foot lifting electromagnet. In actual work, the problem of electromagnet heating is often encountered. When the temperature of the electromagnet reaches a certain level, the force of the electromagnet will drop significantly, and eventually the presser foot cannot be lifted normally. In actual work, the structure of the presser foot needs a holding force to avoid the influence of the up and down movement of the presser foot on the whole structure during the sewing process. Therefore, the entire presser foot lifting process is divided into two processes: the lifting process and the holding process. The lifting process is about 0.1-0.2 seconds, and the ho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B29/02
CPCD05B29/02D05D2207/05D05D2209/08
Inventor 田国兵宋施杓王志
Owner JACK SEWING MASCH CO LTD
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