| 摘要 |
PURPOSE: To make it possible for anyone to regulate spray amount simply and exactly by providing an intermittent spray part in the spray passage of an aerosol device. CONSTITUTION: When a button 3 is depressed, aerosol contents are sent through a stem 4, a discharge opening 14 and a communication hole 43 into a second pressure chamber 42. When the pressure of the second pressure chamber 42 becomes high, a piston 15 is forced down, a second communication hole 48 is open to the second pressure chamber 42 and the aerosol contents are sent through the second communication hole 48 and a first communication hole 44 into a pressure chamber 23. When both the pressure chamber 23 and the second pressure chamber 42 are increased in pressure, since the pressure exerting area of the piston 15 on the side of the pressure chamber 23 is larger than that of the piston 15 on the side of the second pressure chamber 42 by 45 minutes in terms of the rod, the piston 15 moves upwardly. In this way an opening 47 at the other end of the first communication hole 44 communicates with a communication passage 49 and the aerosol contents are sprayed from a spray nozzle 19 to outside. When the pressure of the pressure chamber 23 is lowered by spraying the aerosol contents, the piston 15 is again moved downwardly to cut off the communication so as to intermittently spray a predetermined amount of aerosol. |
