| 摘要 |
<p>The present invention relates to an upper thread loop formation promoting device for a sewing machine and, more specifically, to an upper thread loop formation promoting device for a sewing machine, which is devised to allow a hook point to snatch a loop by an upper thread of a sewing thread and rotate the loop without a bobbin by forming the loop formed by the upper thread of the sewing thread in lock-stitching to be more adjacent to the hook point, be more great, and be formed at a predetermined location so as not to be twisted. The upper thread loop formation promoting device (1) for the sewing machine of the present invention comprises: a pillar (110) having a predetermined length formed in a square pillar shape corresponding to the shape of a protrusion (310) of a bobbin handle (330); and a plate-shaped bent portion (120) having defining an upper thread guide hole (121) defined at a central portion threreof, and bent from an upper end of the pillar (110) toward the hook (210), wherein the pillar and the bent portion are integrally formed in a″��Prime; shape, and a lower end of the pillar (110) is bonded to the an upper end of the protrusion (310) by welding such that the bent portion (120) is disposed in a region (s) between a needle plate (400) and an upper portion of a rotational circulation (c). According to the upper thread loop formation promoting device for the sewing machine of the present invention, the hook point can snatch the loop formed by the upper thread of the sewing thread without the bobbin by forming the loop formed by the upper thread of the sewing thread in lock-stitching so as to be spaced more apart from a needle and be more adjacent to the hook point, be more wide and great, and be formed on a predetermined location so as not to be twisted, thereby preventing a non-stitching to prevent defects of sewing, and also preventing damages such as abrasion and a break due to a contact of the hook point and the needle to extend a life span.</p> |
