Rotary shuttle device for sewing machine

A sewing machine and bobbin technology, which is applied in the direction of sewing machine components, sewing machine ring mechanism, sewing equipment, etc., can solve the problem of sewing quality decline and other problems

Inactive Publication Date: 2007-04-18
KOBEST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, another problem arises th

Method used

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  • Rotary shuttle device for sewing machine
  • Rotary shuttle device for sewing machine
  • Rotary shuttle device for sewing machine

Examples

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Embodiment Construction

[0050] The present invention will be further described by way of examples. Apparently, those skilled in the art can understand that these embodiments are only more specific descriptions and the scope of the present invention is defined by the appended claims rather than the embodiments.

[0051] 18 is an exploded perspective view of a rotary hook device for a sewing machine according to an embodiment of the present invention, and FIG. 19 is a cross-sectional view of FIG. 18 . The rotary hook device 1 for a sewing machine according to an embodiment of the present invention includes a hook body 25 provided on a drive shaft 10; the bobbin case base 30 accommodated in the hook body 20 and a bobbin case main body 50 holding the bobbin outside; The winding shaft, a first flange formed at one end of the winding shaft to contact the bottom surface of the bobbin case base 30, and a second flange formed at the other end of the winding shaft. A portion of the first flange 430 is inclin...

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Abstract

The present invention relates to a rotary shuttle device for a sewing machine, in which an inclined portion is formed at a first flange of a bobbin so as to allow a significant increase in a winding amount of lower thread and prevent a thread breakage and a thread tangle, and also in which a hook body is adapted to have a single model of gib and a replacement of the hook body is not needed regardless of a sewing speed and a thickness of a sewing material so as to obtain a good sewing quality, thereby remarkably reducing a cost of a component and workforce and labor for replacing the component. The rotary shuttle device for a sewing machine, comprising a hook body disposed at a driving shaft; a bobbin case provided with a bobbin case base having a stud rod and accommodated in the hook body and a bobbin case body for holding a bobbin at an outside; and a bobbin formed with a winding shaft which is disposed in the bobbin case and on which lower thread is wound, a first flange formed at one of the winding shaft so as to be contacted with a bottom surface of the bobbin case base and a second flange formed at the other end of the winding shaft, is characterized in that the bobbin has an inclined portion in which a part of the first flange is inclined toward a winding portion.

Description

technical field [0001] The present invention relates to a rotary hook device for a sewing machine, more particularly to a rotary hook device for a sewing machine, wherein an inclined portion is formed on a first flange of the bobbin so as to allow a significant increase in the winding amount of the bobbin thread And prevent thread breakage and thread tangling, and wherein, irrespective of the sewing speed and thickness of the sewing material, adopting the hook body with a single form of clamping wheel, it is not necessary to replace the hook body in order to obtain good sewing quality, thus significantly reducing the component cost and workload and labor for replacement components. Background technique [0002] Generally, in a sewing machine, a hook device 100 for supplying a bobbin thread is provided. The rotary hook device 100 is provided on a drive shaft 10 rotatably connected to a driving device, and is composed of a hook body 20, a bobbin case BC accommodated in the ho...

Claims

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Application Information

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IPC IPC(8): D05B57/14D05B57/26D05B57/28
CPCD05B57/26D05B57/14D05B57/28
Inventor 李相哲
Owner KOBEST
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