Patent ID: 7188794

Claim:
An oscillating device of a spinning reel for oscillating a spool front and rear as a handle of the spinning reel rotates, the spool being attached to a spool shaft in a reel unit of the spinning reel, the oscillating device comprising: a bi-lobe first non-circular gear mounted to a rotational axis of the handle; a rotary cam rotatably mounted in the reel unit so as to be parallel with the first non-circular gear, the rotary cam having a cam protrusion protruding in a direction that is parallel to the rotational axis, and a multi-lobe second non-circular gear mounted in the reel unit such that a tooth corresponding to a minimum tip diameter of one of the first and second non-circular gears meshes with a tooth corresponding to a maximum tip diameter of the other of the first and second non-circular gears, the number of teeth of the second non-circular gear being greater than that of the first non-circular gear; and a slider mounted in the reel unit so as to be movable in an axial direction of the spool shaft, the slider being mounted to the spool shaft so as to be relatively immovable at least in the axial direction of the spool shaft, the slider including a cam groove that engages the cam protrusion.