| 摘要 |
A vacuum gun for a suction device consists of a piston housing (10), a suction control knob (20) and a rear housing (40) with a handle (42) and a trigger (43). The piston housing has (10) multiple vacuum breaker holes (13) defined to communicate with the inside of the piston housing (10) in a row. The suction control knob (20) is rotatably mounted on the piston housing (10) to selectively block the vacuum breaker holes (13) to control the amount of suction generated during each stroke of the piston. Additionally, the handle and the trigger are foldable toward the piston housing (10) to make the vacuum gun easy to store. |
