Patent ID: 11940649
Assignee: FURUKAWA ELECTRIC CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  C | IPC C  G

Claim 0:
1. An optical fiber bundle structure, comprising:
plural optical fiber core wires;
a crossing preventing member having the plural optical fiber core wires inserted through the crossing preventing member along a longitudinal direction; and
a grasping member that applies a grasping force to the crossing preventing member, wherein
the plural optical fiber core wires have, in order from a leading end of the plural optical fiber core wires, a glass fiber portion, and a resin coated portion having resin coated on glass fibers,
the glass fiber portion has, in order from a leading end of the glass fiber portion, a small diameter portion, a tapered portion, and a large diameter portion,
the crossing preventing member has slits formed therein, the slits each having a width with a width's center at a point equally dividing one of sides of a polygon circumscribing the plural optical fiber core wires, by a number of the optical fiber core wires that are in contact with that side in a cross section of the crossing preventing member, the cross section being orthogonal to the longitudinal direction, the slits extending from a leading end of the crossing preventing member to a midway point closer to a trailing end of the crossing preventing member, and
the widths of the slits positioned at the respective sides are each equal to or larger than a difference between: a length of one side of a polygon circumscribing the plural optical fiber core wires at a hindmost end portion of the slits at the trailing end; and a length of one side of a polygon circumscribing the plural optical fiber core wires at the leading end.