| 摘要 |
<p>The present invention relates to a bobbin case used in a sewing machine consisting of the following: a case body forming a space which accommodates bobbin threads for the sewing machine as the bottom is opened; a cutting unit formed by being cut from the upper center of the case body to one side surface of the case body at a regular distance; a clamp protrusion symmetrically formed on one side surface of the case body; a tension plate fixing unit eccentrically formed at the upper center of the case body; and a fixing plate screw-combined with the tension plate fixing unit, wherein the bobbin threads accommodated in a space formed on the case body are drawn to the cutting unit. Also, a fixing groove and a controlling groove are additionally formed on the tension plate fixing unit. A fixing screw groove and controlling screw groove are additionally formed on a tension plate. Screws inserted into the controlling groove and the controlling screw groove are loosened or tightened. Therefore, the tension of bobbin threads for the sewing machine can be controlled and maintained. Also, a handle is formed on the other side surface of the case body. A guide unit which guides the bobbin threads toward the sewing machine is formed on one side surface of the tension plate.</p> |
