BOBBIN FOR WINDING OPTICAL FIBER AND OPTICAL FIBER

摘要

A bobbin for winding an optical fiber includes a main winding drum having a cylindrical shape, an auxiliary flange portion that is provided on at least one of a first end and a second end of the main winding drum in an axis direction of the main winding drum, a first main flange portion that has a larger diameter than the external diameter of the auxiliary flange portion and that is provided on the main winding drum to face the auxiliary flange portion, a second main flange portion that is provided on the main winding drum to face the first main flange portion, and an auxiliary winding drum that is provided between the first main flange portion and the auxiliary flange portion.

主权项

1. A bobbin for winding an optical fiber, comprising:
a main winding drum comprising a cylindrical shape; an auxiliary flange portion that is provided on at least one of a first end and a second end of the main winding drum in an axis direction of the main winding drum; a first main flange portion that has a larger diameter than an external diameter of the auxiliary flange portion and that is provided on the main winding drum to face the auxiliary flange portion; a second main flange portion that is provided on the main winding drum to face the first main flange portion; and an auxiliary winding drum that is provided between the first main flange portion and the auxiliary flange portion, wherein a cutout portion that is recessed in a direction orthogonal to a central axis of the bobbin is formed at an outer peripheral edge of at least one of the first main flange portion and the second main flange portion, wherein a maximum depth from the outer peripheral edge of the cutout portion is a depth that does not reach an outer peripheral surface of the main winding drum, and wherein a groove portion, which communicates with the cutout portion and extends obliquely from the cutout portion along a tangential direction of the outer peripheral surface of the main winding drum toward the outer peripheral surface of the main winding drum, is formed in at least an inner surface of the inner surface and an outer surface of at least one of the first main flange portion and the second main flange portion.