Disclosed is a fluid-filled cylindrical vibration damping device including an elastic body interposed between an inner and outer sleeves for elastically connecting these sleeves with each other. The switching mode power supply enters boost mode when an input signal is higher than a preset threshold to pump the input signal to a higher level; and the switching mode power supply enters buck mode when the input signal breaks down to release the stored energy. Hence, the toilet seat is more beautiful. The inner slip section has an outer circumferential surface disposed around the inner part.