Mouse scroll wheel mechanism

A mouse scroll wheel mechanism, comprising:

• a scroll wheel base;
• a scroll wheel body, mounted on the scroll wheel base and rotating vertically in an upright position, shaped partially annular and having a central accommodation space, the scroll wheel body being disposed with a plurality of radially distributed guide grooves, with each guide groove provided with at least one magnetic conductive member partially protruding through an opening of the guide groove without leaving the guide groove while the at least one magnetic conductive member is located and moves within the guide groove in a direction toward or away from the center of the scroll wheel body;
• and
• a fixed base, fixed to the scroll wheel base and located within the central accommodation space, the fixed base being provided with at least one magnet, and the at least one magnet being disposed in a non-contacting manner facing the guide grooves;
• wherein each of the guide grooves has a guide groove radial width and a guide groove axial width, each of the at least one magnetic conductive member has a magnetic conductive member diameter and a magnetic conductive member axial width, the opening has an opening radial width, the guide groove axial width is greater than the magnetic conductive member axial width, the magnetic conductive member diameter is smaller than the guide groove radial width and greater than the opening radial width, and when the scroll wheel body rotates, variations in a rotational speed cause variations in magnetic force between the at least one magnet and the at least one magnetic conductive member to produce an intermittent gear feel or a rapidly rotating flywheel feel.