Patent ID: 8091900

Claim:
An apparatus for operating a roller imbedded in a shoe up and down, comprising: a main body fixed to a bottom of the shoe; an operating body to which the roller is imbedded, which is slidably mounted within the main body; and an operating assembly to move the operating body within the main body between an operating position and a non-operating position, wherein the roller protrudes out from the main body in the operating position while the roller is retracted into the main body in the non-operating position, wherein the operating assembly comprises: a guide plate placed on an upper portion of the main body; and a cam bar arranged on a surface of the guide plate which faces the operating body, to move between a retracting position in which the cam bar is arranged parallel to the guide plate, and an upright position in which the cam bar stands upright from the guide plate to press the operating body.