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Title:
DEVICE FOR DETECTING THE END OF THE LOWER THREAD OF A SEWING MACHINE
Document Type and Number:
WIPO Patent Application WO/2012/002624
Kind Code:
A1
Abstract:
The present invention relates to a device for detecting the end of the lower thread of a sewing machine, in order to prevent defective quality and the need for reworking which arise from faulty stitching due to being unable to detect the depleted lower thread or cut lower thread during sewing work. The device for detecting the end of the lower thread of a sewing machine according to the present invention comprises: at least one pair consisting of a terminal for inputting a lower thread end detection signal and a terminal for outputting a lower thread end detection signal; contact means for electrically connecting the terminal for inputting a lower thread end detection signal to the terminal for outputting a lower thread end detection signal; contact function control means for enabling or disabling the function of the contact means, according to whether or not a lower thread that is wound at a lower thread end point of a lower thread bobbin is being unwound; and a control notification device for transmitting an electrical signal to the terminal for inputting a lower thread end detection signal, determining whether or not the end of a lower thread has been reached by analyzing an electrical signal received from the terminal for outputting a lower thread end detection signal, and outputting the results to a user.

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JPH0924175SEWING MACHINE BOBBIN THREAD DETECTING DEVICE
JPH08266772METHOD AND DEVICE FOR DETECTING BOBBIN THREAD RESIDUAL AMOUNT, IN SEWING MACHINE
Inventors:
CHO MYUNG RAI (KR)
Application Number:
PCT/KR2010/007954
Publication Date:
January 05, 2012
Filing Date:
November 11, 2010
Export Citation:
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Assignee:
BOBBINTEL INC (KR)
CHO MYUNG RAI (KR)
International Classes:
D05B59/02
Foreign References:
KR20060110612A2006-10-25
KR20070027094A2007-03-09
KR100929600B12009-12-03
JP3194432B22001-07-30
Attorney, Agent or Firm:
KIM, Ham-Kon (668-2 Yoksam-dong Kangnam-gu, Seoul 135-080, KR)
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Claims:



 
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