Structure of wrench changeable in active turning direction

An improvement on a wrench changeable in active turning direction, comprising

• a wrench main body having a head at one end;
• the head having a holding space therein;
• an engaging member having a plurality of protruding portions spaced apart on an outer side thereof, and a plurality of concave portions spaced apart on the outer side and between every two adjacent ones of the protruding portions;
• a direction setting plate;
• the direction setting plate having a through hole on a middle thereof;
• the direction setting plate having a plurality of upright protruding portions spaced apart on one side, equidistant from a center thereof;
• the direction setting plate having a plurality of spaces between every two adjacent ones of the upright protruding portions thereof;
• a plurality of beads fitted on and biased away from one of both the engaging member and the direction setting plate and pressed against other one of both the engaging member and the direction setting plate;
• a plurality of twin locating holes formed on one of both the engaging member and the direction setting plate so as to face in a direction opposite to the beads;
• each of the biased beads being fitted on one of corresponding twin locating holes;
• and
• a plurality of rolling elements each positioned in one of the spaces between every two adjacent ones of the upright protruding portions of the direction setting plate;
• the wrench main body being going to engage both the engaging member and the direction setting plate so as to cause the engaging member to turn together with it when each of the biased beads is fitted on a first one of corresponding twin locating holes, and when the wrench main body is turned in a first direction;
• the wrench main body being going to turn relative to the engaging member when each of the beads is fitted on the first one of corresponding twin locating holes, and when the wrench main body is turned in a second direction opposite to the first one;
• the wrench main body being going to engage both the engaging member and the direction setting plate so as to cause the engaging member to turn together with it when each of the beads is fitted on a second one of corresponding twin locating holes, and when the wrench main body is turned in the second direction;
• the wrench main body being going to turn relative to the engaging member when each of the beads is fitted on the second one of corresponding twin locating holes, and when the wrench main body is turned in the first direction.