Abstract: A dual purpose cycle includes a frame unit, a wheel unit, a hub unit, and two crank arm units. The wheel unit includes a front wheel rotatably mounted to the frame unit. The hub unit surrounds an axis, extends though the front wheel, and includes opposite mounting portions respectively disposed at two opposite sides of the front wheel. Each of the mounting portions has an end surface facing oppositely of the front wheel, and an engaging groove indented from the end surface along the axis and having a non-circular cross-section. Each of the crank arm units includes an engaging member having a non-circular cross section, and removably and engagingly inserted into the engaging groove of a respective one of the mounting portions.

Abstract: A dual purpose cycle includes a frame unit, a wheel unit, a hub unit, and two crank arm units. The wheel unit includes a front wheel rotatably mounted to the frame unit. The hub unit surrounds an axis, extends though the front wheel, and includes opposite mounting portions respectively disposed at two opposite sides of the front wheel. Each of the mounting portions has an end surface facing oppositely of the front wheel, and an engaging groove indented from the end surface along the axis and having a non-circular cross-section. Each of the crank arm units includes an engaging member having a non-circular cross section, and removably and engagingly inserted into the engaging groove of a respective one of the mounting portions.

Abstract: A sound generator used in a cycle having a main body for a child to ride is disclosed. The sound generator includes a lever, a device for defining an original position of the lever relative to the main body and urging the lever to return to the original position after being swung away therefrom, and a sounder adapted to be actuated by the lever. The lever has a first end and a second end, and is formed with a pad at the first end for the child to recline thereagainst and is pivotally connected to the main body of the cycle at the second end.