Line roller unit and fishing line guide mechanism

A line roller unit for a fishing line guide mechanism, the line roller unit comprising:

• a shaft member,
• a cylindrical member positioned on the shaft member, wherein the cylindrical member includes a holding unit defined therein, wherein the cylindrical member includes a first cylindrical part having an outer diameter that partially defines the holding unit, a second cylindrical part having an outer diameter that is larger than the outer diameter of the first cylindrical part, and a third cylindrical part having an outer diameter that is larger than the outer diameter of the first cylindrical part, wherein the first and second cylindrical parts define a first step portion, and wherein the first and third cylindrical parts define a second step portion
• a bearing that includes an outer race, an inner race and a plurality of ball bearings positioned between the inner and outer races, wherein the inner race is positioned in the holding unit and between the first and second step portions,
• a line roller that includes a central opening defined therethrough, wherein the bearing is positioned within the central opening such that the line roller can rotate about the shaft member and the cylindrical member,
• a first magnetic seal positioned within the central opening and between an inner diameter of the line roller and the cylindrical member, wherein the first magnetic seal includes a first magnet and a first holding member, wherein the first magnetic seal forms a first magnetic circuit for holding a first magnetic fluid positioned in a space between the second cylindrical part and the first holding member,
• a second magnetic seal positioned within the central opening and between the inner diameter of the line roller and the cylindrical member, wherein the second magnetic seal includes a second magnet and a second holding member, wherein the second magnetic seal forms a second magnetic circuit for holding a second magnetic fluid positioned in a space between the third cylindrical part and the second holding member
• wherein the inner diameter of the line roller includes first and second inner diameter portions with a third inner diameter portion positioned therebetween, wherein the third inner diameter portion has a smaller diameter than the first and second inner diameter portions, wherein the first magnetic seal is positioned between the first inner diameter portion and the second cylindrical part and the second magnetic seal is positioned between the second inner diameter portion and the third cylindrical part.

A line roller unit for a fishing line guide mechanism that guides a fishing line to a spool of a spinning reel, the line roller unit comprising:

• a line roller,
• a bearing positioned on an inner circumferential surface of the line roller,
• a cylindrical member that has a holding unit for holding the bearing and that is positioned on an inner circumferential surface of the bearing, and
• a first magnetic seal that includes a first magnet and a first holding member that holds the first magnet, wherein the first magnetic seal forms a first magnetic circuit for holding a first magnetic fluid positioned in a space between the cylindrical member and the first holding member.