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Electric sewing machine

A technology for electric sewing machines and motors, which is applied to sewing machine components, sewing machine control devices, sewing equipment, etc., can solve the problems of complex structure of monitoring devices and high manufacturing costs, achieve effective use of sewing materials, reduce product rework rate, and protect motors Effect

Inactive Publication Date: 2012-04-25
李永鹏
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the sewing machine can report the situation of the bottom thread spool, it has the disadvantages of complex structure of the monitoring device and high manufacturing cost.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Electric sewing machine
  • Electric sewing machine
  • Electric sewing machine

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Embodiment Construction

[0023] Such as figure 1 , 2 As shown, the electric sewing machine includes a machine head 1, a platen 2, a bracket 3, a motor 4, a pedal 5 and a bottom thread monitoring device. Platen 2 is installed on the support 3, and machine head 1 is installed on the top of platen 2, and machine head 1 is provided with a group of presser foot 6 and machine needle 7 that finish sewing work at the position relative to platen 2. Presser foot 6 can vertically move up and down, to compress the cloth 14 to be stitched up below it, and presser foot 6 is provided with a U-shaped opening. Machine needle 7 bottoms have sewing thread, just in and out from the U-shaped opening of presser foot 6 when it moves vertically up and down, and sewing thread is sewn in the cloth 14. The motor 4 is arranged on the lower part of the platen 2, on which a clutch is arranged. Pedal 5 is movably connected with motor 4 bottoms. The bottom line monitoring device includes a line position sensor 8 , a relay 9 , a ...

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Abstract

The invention discloses an electric sewing machine which comprises a machine head, a bedplate, a stent, an electromotor and a pedal, wherein, the machine head is provided with a presser foot and a machine needle which are arranged in the position opposite to the bedplate; the presser foot is provided with a U-shaped opening; and the electromotor is provided with a clutch which is linked with the pedal through a link lever; and the electric sewing machine also comprises a bobbin thread monitoring apparatus. When the electric sewing machine works at a high speed, and conditions that bobbin threads use up or break, the stitch slips, the bobbin threads loose, etc. happen, a thread position sensor can be triggered by sewing threads on the machine needle, and a signal can be given out to impel the bobbin thread monitoring apparatus to act and enable the electric sewing machine to stop. The bobbin thread monitoring apparatus has the advantages of simple structure and low manufacturing cost, and no need of a complicated electronic control system for realizing the bobbin thread monitoring; and the machine can be stopped when no bobbin thread exits and the bobbin threads breaks, or the stitch slips or the bobbin threads loose, thereby realizing the effect that the sewing material is effectively utilized, saving resources, reducing the product rework rate, and improving the production efficiency.

Description

technical field [0001] The invention relates to an electric sewing machine. Background technique [0002] The electric sewing machine is a sewing tool with automatic operation function. You only need to place the fabric to be processed on the correct position of the platen. After the power switch is turned on, the motor of the sewing machine starts, and the sewing machine automatically enters the forward sewing state to sew the fabric when the pedal is pressed. After the pedal is released, the clutch in the motor disengages, and the sewing machine stops working. When the sewing machine is working at high speed, it is difficult to observe the internal conditions of the sewing machine with the naked eye, especially when the bobbin thread is used up, stitches are skipped, and the bobbin thread is too loose. Once these situations happen, the workers cannot detect in time at all, and there are quality problems such as loose stitching and loose sewing threads in the sewn fabrics....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D05B69/00D05B69/10D05B69/36
Inventor 李永鹏
Owner 李永鹏
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