A side face excluding the edge of a squeegee cleaner made of a plate-shaped urethane rubber is brought into pressure contact with a squeeze roller. Oil film breakage is avoided as negative pressure is prevented from generating between the shaft and sleeve of the hydrodynamic bearing. This arrangement provides an effective and durable design which inhibits the transfer of heat from hot surfaces to the foot. Activation and deactivation of the device may further be based on a confirmation or cancellation of a purchase transaction associated with the device, such as a purchase of the device. The electric field shield transmits a magnetic field generated by the magnetic force generator to make it arrive at the magnetic force receiver but shields the detecting electrode from an electric field generated by the magnetic force generator to interrupt arrival to the detecting electrode and not to substantially obstruct the detection by the detector. An actuator member or yoke is movable to move the retaining member and the outer ends of the engagement levers to disengage the drive apparatus.