Patent ID: 8485461

Claim:
A spinning reel spool coupling structure to couple a spinning reel spool to a spool shaft passing through the spinning reel spool under a condition in which the spinning reel spool is prevented from rotating relative to the spool shaft, comprising: a pin insertion portion having a through hole passing through the spool shaft and extending along a diameter of the spool shaft; an anti-rotation pin including a first anti-rotation portion provided on a first end of the anti-rotation pin, a fitting portion disposed adjoining the first anti-rotation portion, the fitting portion having a length such that the fitting portion is fitted into the pin insertion portion, and a second anti-rotation portion extending from the fitting portion towards a second end of the anti-rotation pin, the second anti-rotation portion having a diameter greater than a diameter of the pin insertion portion; a retainer member preventing the anti-rotation pin from being detached from the spool shaft, the retainer member disposed on an outer peripheral side of the first anti-rotation portion, the retainer member having an axial length such that the retainer member contacts the spool shaft; and an anti-rotation groove formed on a boss configured at an end of a spool tubular portion, to which the spool shaft is inserted, the anti-rotation groove extending in a direction substantially perpendicular to a length of the spool shaft, the anti-rotation groove engaging the second anti-rotation portion.