| 摘要 |
A buoyancy operation mechanism of a suction and extraction device (6) for a toilet bowl comprises a bottom plate provided with a lower leading pole (11) and a second pulley (13); a water tank (1) provided with an aperture and a first pulley (12); an upper cover (2) provided with an upper leading pole (21) and a third pulley (22); a hollow floating box (3) of rectangular or circular section provided with a leading hole (31), a limit barrier (32), a first flying ring (33) and a second flying ring (34) in the centre; a base (4) provided with a fourth pulley (44), and a top cover (5). The water tank (1) is seated on the base (4). The leading hole (31) of the floating box (3) is provided on the lower leading pole (11). The upper cover (2) is provided in the water tank (1). The top cover (5) is covered on the top of the water tank (1). The first flying ring (33) of the floating box (3) is laced with a first pulling rope (51). The second flying ring (34) is laced with a second pulling rope (52) which is arranged outside the water tank (1). Via a change of liquid level in the water tank during the process of flushing the toilet, the buoyancy operation mechanism can automatically control the suction and extraction device (6) to pump and reset by utilizing the pulling ropes. The mechanism is compact in structure and convenient in operation. |
