Stop structure for cordless roller shade

A stop structure comprising:

• a bracket;
• a mounting seat mounted on the bracket;
• a rotation wheel mounted on the mounting seat;
• a locking piece mounted on the mounting seat;
• and
• a spring mounted on the rotation wheel;
• wherein:
• the bracket includes a fitting portion, a first retaining portion, and a resting portion;
• the first retaining portion of the bracket is provided with at least one first connecting end;
• the mounting seat is provided with a second retaining portion corresponding to the first retaining portion of the bracket;
• the second retaining portion of the mounting seat is provided with at least one second connecting end corresponding to and connected with the first connecting end of the bracket;
• the mounting seat has a first face provided with an axle and a second face provided with a receiving area;
• the receiving area of the mounting seat is provided with a shaft hole and a recess;
• the rotation wheel is mounted on the axle of the mounting seat;
• the rotation wheel has an interior provided with a receiving space;
• the rotation wheel has a first end provided with an opening connected to the receiving space;
• the rotation wheel is provided with a connecting area;
• the rotation wheel has a second end provided with an axle hole and at least one positioning hole;
• the axle hole of the rotation wheel is mounted on the axle of the mounting seat;
• the locking piece is mounted on the receiving area of the mounting seat;
• the locking piece is provided with a shaft rotatably mounted in the shaft hole of the mounting seat;
• the locking piece has a first end provided with a positioning projection positioned in the at least one positioning hole of the rotation wheel;
• a push member is mounted in the recess of the mounting seat and biased between a second end of the locking piece and the mounting seat;
• when the resting portion of the bracket presses the locking piece, the positioning projection of the locking piece is detached from the at least one positioning hole of the rotation wheel;
• the spring is mounted in the receiving space of the rotation wheel;
• and
• the spring has a first end provided with a first connecting portion connected with the connecting area of the rotation wheel and a second end provided with a second connecting portion connected with the axle of the mounting seat.