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Sewing machine thread trimmer

A sewing machine and mounting seat technology, which is applied to sewing machine components, thread-cutting mechanisms in sewing machines, sewing equipment, etc., can solve the problems of complex transmission mode and inconvenient installation, and achieve compact overall structure, space saving, and stable transmission. Good results

Active Publication Date: 2020-06-09
JACK SEWING MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When working, the cam part drives the connecting rod to move, and the connecting rod drives the moving rod to move axially. The transmission method is complicated. The motor and the moving rod are not an integral structure, which is inconvenient to install.

Method used

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  • Sewing machine thread trimmer
  • Sewing machine thread trimmer
  • Sewing machine thread trimmer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Such as figure 1 The shown sewing machine thread trimming device includes a fixed seat 1, a blade mounting seat 2 is provided on one side of the fixed seat 1, and a lower blade 3 is fixed on the end of the blade mounting seat 2, and the blade mounting seat 2 is also provided with a The support hole extending in the length direction is pierced with a knife shaft 4 that is precisely matched with the support hole and can rotate along its own central axis. One end of the knife shaft 4 is fixed with an upper blade 5 that is engaged with the lower blade 3 .

[0045] Such as figure 1 As shown, the fixed seat 1 is provided with a drive member 6 for driving the cutter shaft 4 to rotate along its own central axis, the drive member 6 is coaxially arranged with the cutter shaft 4 and connected with the cutter shaft 4 through a transmission structure, and the cutter shaft 4 is connected to the blade An adjustment structure for always making the upper blade 5 and the lower blade 3 t...

Embodiment 2

[0063] The structural principle of this embodiment is basically the same as that of Embodiment 1, the difference is that, as Image 6 with 7 As shown, the inner bushing 8 is connected to the piston rod of the driving part 6, and the outer bushing 7 is connected to the cutter shaft 4. When the inner bushing 8 moves axially under the action of the driving part 6, the outer bushing 7 is driven circumferentially turn.

[0064] Such as Figure 7 As shown, the outer shaft sleeve 7 is provided with at least one helical track 2 18, and the inner shaft sleeve 8 is provided with a limit pin 2 19 whose outer end slides with the helical track 2 18. The number of track two 18 is equal and the limit pin two 19 and the spiral track two 18 are provided in one-to-one correspondence.

[0065] In order to ensure that the inner end of the limit pin 2 19 can fit accurately and can slide well in the spiral track 2 18, the outer end of the limit pin 2 19 is spherical. In order to facilitate the ...

Embodiment 3

[0068] The structural principle of this embodiment is basically the same as that of Embodiment 1, the difference is that there are 3 spiral track 1 and they are distributed in a circular array to ensure the stability between the inner shaft sleeve 8 and the outer shaft sleeve 7 during linkage. performance, improve transmission accuracy.

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Abstract

The invention provides a sewing machine thread cutting device, belongs to the technical field of machinery and solves the problem that an existing sewing machine thread cutting device is incompact in structure and large in occupied space and seriously affects the appearance of a sewing machine. The sewing machine thread cutting device comprises a fixed seat, a blade mounting seat is arranged on one side of the fixed seat, a lower blade is fixed at the end of the blade mounting seat, a supporting hole extending along the length direction of the fixed seat is formed in the blade mounting seat, a cutter shaft precisely matched with the supporting hole penetrates the supporting hole and can rotate along the central axis of the cutter shaft, an upper blade engaged with the lower blade is fixed at one end of the cutter shaft, a driving part for driving the cutter shaft to rotate along the central axis of the cutter shaft is arranged on the fixed seat, coaxial with the cutter shaft and connected with the cutter shaft through a transmission structure, and an adjusting structure for constantly engaging the upper blade with the lower blade is arranged between the cutter shaft and the blade mounting seat. The sewing machine thread cutting device has the advantages of compact structure, small occupied space, convenience in mounting, low cost and the like.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a thread trimmer for a sewing machine. Background technique [0002] With the continuous development of science and technology, the degree of automation of sewing machines is getting higher and higher. The existing sewing machines are generally equipped with automatic thread trimmers. The suture is cut to separate the suture from the fabric, which can save sewing time and reduce the labor intensity of sewing workers. [0003] For example, a Chinese patent discloses a sewing machine thread trimming device [Authorized Notification No. CN204959277U], which includes a power unit connected to a fixed piece, the fixed piece is connected to one end of a linkage arm through a linkage shaft, and the other end of the linkage arm is fixed in the axial direction Connect the knife bar; the power device can drive the knife bar to rotate; one end of the knife bar is fixedly provided with a movi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B65/00
CPCD05B65/00
Inventor 叶志吴平陈力勇黄先旺张鑫媛
Owner JACK SEWING MASCH CO LTD