Mouse scroll wheel mechanism

A mouse scroll wheel mechanism, comprising:

• a carrying unit, a roller, a plurality of sheet-shaped magnetic conductive members and a magnet member;
• wherein the carrying unit is provided with a first mounting member and at least one second mounting member, the roller is arranged on the first mounting member and can rotate, the plurality of sheet-shaped magnetic conductive members have the same shape and are distributed at equal angles and intervals on the circumference of the roller, and two adjacent sheet-shaped magnetic conductive members are separated by a non-magnetic conductive object;
• the magnet member has a strong magnetic pole surface, the magnet member is arranged on the second mounting member, and the pole surface faces the roller and is separated by a distance, the magnet member faces the sheet-shaped magnetic conductive member in a non-contact manner, in the moving direction of the sheet-shaped magnetic conductive member facing the magnet member, the body size of the sheet-shaped magnetic conductive member is smaller than the pole size of the magnet member, and when the roller rotates, intermittent strong and weak magnetic restoring forces is generated between the magnet member and the sheet-shaped magnetic conductive member.