Patent ID: 8661938

Claim:
A pedal for a bicycle comprising: an axial rod; a pedal body rotatably assembled to the axial rod, the pedal body defining a first locking portion and a second locking portion at two opposite sides, the first locking portion and the second locking portion each having two engaging grooves defined at a lateral side thereof; two fastening devices respectively assembled to the pedal body, one of the two fastening devices assembled on a top plane of the first locking portion and the other fastening device assembled on a bottom plane of the second locking portion, each of the two fastening devices having a positioning member, a fastening member and a flexible controlling set, the positioning member assembled with the respective locking portion and having two protruded rings at two sides, the fastening member having an adjusting portion and two fastening portions connected with the two protruded rings of the positioning member by a spindle, the flexible controlling set having two torsion springs, an abutting member and an adjusting bolt, the two torsion springs mounted around the spindle between the two fastening portions of the fastening member, each of the two torsion springs having one end positioned in the respective engaging groove of the corresponding locking portion and the other end abutted by the abutting member, the adjusting bolt passing through the adjusting portion and being screwed into the abutting member to adjust strength of the two torsion springs; and two engaging members respectively assembled to the pedal body, one of the two engaging members assembled on a bottom plane of the first locking portion and the other engaging member assembled on a top plane of the second locking portion, and each engaging member being substantially U-shaped so as to form a receiving space.