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Middle presser foot mechanism of sewing machine

A presser foot mechanism and sewing machine technology, which is applied in the field of sewing machines, can solve the problems that the presser foot drive device cannot work selectively and cannot be automatically adjusted, and achieves the effects of low noise, simple structure, and guaranteed sewing quality

Active Publication Date: 2011-09-14
四川精上缝纫机有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem that the presser foot driving device in the sewing machine cannot selectively work according to the needs, and cannot automatically adjust in real time according to the thickness change of the sewing material

Method used

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  • Middle presser foot mechanism of sewing machine
  • Middle presser foot mechanism of sewing machine
  • Middle presser foot mechanism of sewing machine

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Embodiment Construction

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] Such as figure 1 , figure 2 and image 3 As shown, the presser foot mechanism in the sewing machine provided by the present invention includes a presser foot bar 3 arranged in the sewing machine housing 21 and a driving device for driving the presser foot bar 3 to move up and down.

[0024] The upper part of the presser bar 3 is provided with a rack 23, the upper part of the rack 23 is inserted in the upper bushing 14, the upper bushing 14 is embedded in the sewing machine casing 21, and the lower part of the presser bar 3 is equipped with a lower bushing 4. The lower end of the presser foot rod 3 is fixedly connected to a middle presser foot 1 through a screw 2 . The middle part of the presser foot bar 3 is provided with an anti-deflection fixed block 6 , and the anti-deflection fixed block 6 is arranged in the anti-deflection fixed block chute 22 on the ...

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Abstract

The invention discloses a middle presser foot mechanism of a sewing machine. The mechanism comprises a presser foot rod and a driving device driving the presser foot rod to move up and down, wherein the presser foot rod is arranged in a shell of the sewing machine. The driving device comprises a servo motor and a control unit, wherein the servo motor is fixed in the shell of the sewing machine; the output shaft of the servo motor is connected with a gear shaft through a connecting head; and the control unit gives out a servo motor start or stop control signal according to a selected instruction of an operator to control the servo motor to start or stop. A rack is arranged on the upper part of the presser foot rod; a middle presser foot is fixed to the lower end of the presser foot rod; and the rack is meshed with a gear on the gear shaft. In the middle presser foot mechanism, the middle presser foot is driven through an independent servo motor and has nothing to do with the motion of a main shaft of a machine needle; and whether the middle presser foot is matched with the needle of the sewing machine or not is manually selected according to different sewing fabrics and processes, so the abrasion of the middle presser foot mechanism is reduced and the sewing speed is increased at the same time.

Description

technical field [0001] The invention relates to a sewing machine, in particular to a presser foot mechanism in the sewing machine. Background technique [0002] When the traditional sewing machine lifts the needle on the sewing material, the needle is easy to lift the sewing material together, causing the problem of thread jumping. In order to realize the anti-jumping function of the sewing machine, the existing method is to add a middle presser mechanism on the sewing machine, but the structure of the existing sewing machine middle presser mechanism is complex, there are many parts, the cost of manufacturing and maintenance is high, and there are the following Some flaws: [0003] (1) The up and down driving device of the intermediate presser is attached to the needle drive shaft, so that as long as the needle moves, the intermediate presser will move up and down. However, in actual work, depending on the sewing fabric and process , sometimes it is necessary to use the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D05B29/02D05B29/06
Inventor 张章生
Owner 四川精上缝纫机有限公司
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