Bobbin

Abstract

[ITEM USE]; [DESIGN DESCRIPTION]; The dashed portion of the figure disclosed is not claimed as the design of the present case; The dotted line surrounded in the figure is the scope of the present case claimed, and the dotted line itself is not claimed as the design of the present case. The appearance difference between the derived design and the original design is that, as shown in the figures, the slanting conical area of the two is slightly different, so the difference between the present case and the original design is small, which does not affect the approximation of the original design and the derived design.