Title:
LOWER THREAD SUPPLY DEVICE OF SEWING MACHINE
Document Type and Number:
WIPO Patent Application WO/2022/114335
Kind Code:
A1
Abstract:
The present invention relates to a lower thread supply device of a sewing machine, and to a lower thread supply device of a sewing machine, the device comprising: a bobbin case (30) having a withdrawing hole (33) through which a lower thread is withdrawn and a needle through-hole (34) through which a needle (60), that is lowered while an upper thread (a) is fed therein, passes, and having, mounted therein, a bobbin cap (50) for accommodating a bobbin (40) around which the lower thread (b) is wound; and a hook body (20) in which the bobbin case (30) is mounted so as to be rotatable by means of a power device of the sewing machine, and which hooks and pulls the upper thread (a) by means of a hook (21), guides an upper thread (a2) of a sewed fabric side toward the front region of the bobbin case (30) and guides an upper thread (a1) of a bobbin side toward the rear region of the bobbin case (30), wherein the bobbin case (30) is provided so as not to rotate when the hook body (20) rotates, the withdrawing hole (33) is formed to have a predetermined length in the circumferential direction of the bobbin case (30) at a position inclined to the right-side with respect to the center of the bobbin case (30) in the horizontal direction, and the bobbin cap (50) is formed such that the lower thread (b) is withdrawn from the right-side thereof, and thus the lower thread (b) passes through and is withdrawn from the withdrawing hole (33) while being unwound from the right-side of the bobbin (40).
Inventors:
HER MUN YOUNG (KR)
Application Number:
PCT/KR2020/017317
Publication Date:
June 02, 2022
Filing Date:
November 30, 2020
Export Citation:
Assignee:
HER MUN YOUNG (KR)
International Classes:
D05B59/00; D05B57/14; D05B57/26
Foreign References:
| KR101828483B1 | 2018-02-12 | |||
| JP2008079950A | 2008-04-10 | |||
| JPH08155176A | 1996-06-18 | |||
| JP2013034494A | 2013-02-21 | |||
| KR20090081466A | 2009-07-29 | |||
| KR102189146B1 | 2020-12-09 |
Attorney, Agent or Firm:
PATENT LAW FIRM GRAND KOREA (KR)
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