US 12,276,058 B2
Embroidery machine thread tension adjusting device
Byeong Jun Son, Seoul (KR)
Assigned to MOBASE SUNSTAR CO., LTD, Incheon (KR)
Appl. No. 18/289,709
Filed by MOBASE SUNSTAR CO., LTD, Incheon (KR)
PCT Filed Dec. 29, 2021, PCT No. PCT/KR2021/020100
§ 371(c)(1), (2) Date Nov. 6, 2023,
PCT Pub. No. WO2022/234921, PCT Pub. Date Nov. 10, 2022.
Claims priority of application No. 10-2021-0059096 (KR), filed on May 7, 2021.
Prior Publication US 2024/0254671 A1, Aug. 1, 2024
Int. Cl. D05C 11/10 (2006.01); D05C 5/02 (2006.01); D05C 11/06 (2006.01)
CPC D05C 11/10 (2013.01) [D05C 5/02 (2013.01); D05C 11/06 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An embroidery machine thread tension adjusting device, adapted for an embroidery machine, including a needle bar, a thread take-up unit, a hook, and an embroidery frame and configured to adjust tension of an upper thread withdrawn from a spool and supplied to a needle of the needle bar through the thread take-up unit, the embroidery machine thread tension adjusting device comprising:
a thread pulling adjusting unit including a thread take-up lever disposed along a path of movement of the upper thread withdrawn from the spool and supplied to the needle configured to control an amount of pulling of the upper thread when rotating while maintaining contact with the upper thread, and a first actuator configured to provide a rotational driving power to the thread take-up lever;
at least one thread guide adjusting unit including at least one pair of thread guide units disposed on at least one of a first end and a second end of the thread pulling adjusting unit along the path of movement of the upper thread, the at least one pair of thread guide units configured to force against each other when the upper thread passes through spaces between the at least one pair of thread guide units and control a frictional force of the upper thread, and a second actuator configured to provide a driving power to the pair of thread guide units;
a controller configured to determine a status of driving of at least one of the needle bar, the needle take-up unit, the hook, and the embroidery frame according to each of multiple pieces of stitch information included in embroidery data, and control the driving of at least one of the first actuator and the second actuator disposed in each of the at least one thread guide adjusting unit according to a result of determination, and adjust at least one of the amount of pulling of the thread take-up lever and the frictional force of the upper thread supplied between the pair of thread guide units disposed in each of the at least one thread guide adjusting unit.