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Patent Searching and Data


Title:
SENSOR FOR SENSING THE END OF THE LOWER THREAD OF A SEWING MACHINE, AND LOWER THREAD BOBBIN
Document Type and Number:
WIPO Patent Application WO/2012/033289
Kind Code:
A3
Abstract:
The present invention relates to a sensor for sensing the end of a lower thread of a sewing machine, which senses that the lower thread is completely spent during a sewing process, to thereby prevent degradation in quality and reworking due to idle backstitching. The sensor includes: a lower thread end sensor photo controller that contacts a lower thread wound around a lower thread bobbin in order to activate or deactivate a light-emitting function, a light-reflecting function, a light-passing or light-transmitting function, and/or a light-blocking function through a physical locomotion operation in accordance with unwinding of the end of the lower thread; a light receiver that receives light emitted by the operation of the lower thread end sensor photo controller, in order to output a sensing signal; and a control notification device that analyzes the sensing signal outputted by the light receiver in order to determine that the end of the lower thread is unwound, and outputs a result of the determination to a user.

Inventors:
CHO MYUNG RAI (KR)
Application Number:
KR2011/005902
Publication Date:
May 31, 2012
Filing Date:
August 11, 2011
Export Citation:
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Assignee:
BOBBINTEL INC (KR)
CHO MYUNG RAI (KR)
International Classes:
D05B59/02; D05B57/26
Foreign References:
US5788171A1998-08-04
JPH0526080U1993-04-06
KR200435370Y12007-01-18
KR100824346B12008-04-24
KR100465132B12005-01-13
KR200377813Y12005-03-11
Other References:
See also references of EP 2615200A4
Attorney, Agent or Firm:
KIM, Ham-Kon (668-2 Yoksam-dongKangnam-gu, Seoul 135-080, KR)
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Claims: