| 摘要 |
PURPOSE: A bottom yarn rolling unit for a sewing machine is provided to increase the number of rolling around a rolling unit to give the convenience for replacement of the rolling unit and the thus-obtained efficiency for its sewing operation. CONSTITUTION: A part perspective of a rolling unit is characterized which illustrates the mounted condition of the rolling unit onto a sewing machine, as a representative view of the desired embodiment. The bottom yarn rolling unit is characterized by mounting the following components thereon with aligning them in specific orderly arrangement. In other words, both ends of a main body of the rolling unit(1) are formed with a connection region(14) inserting movably into a central pin(21) in a central zone. Also, the both ends of the main body(1) are each mounted with edge walls(11 and 12). An edge wall of the both must have, however, those less than outer diameter of the other edge wall. A circumferential surface of a compartment wall(13) is equipped with the repeated curved convex region(13a) and concave region(13b) between the both edge walls(11 and 12).
|
