MECHANISM FOR CONTROLLING PRESSURE OF COMPRESSED FLUID, AND SPRAY DEVICE

摘要

A mechanism for controlling the pressure of carbon dioxide gas (7) placed in a gas cartridge (8).  The mechanism comprises: the gas cartridge provided with a gas nozzle opening (13) for discharging the carbon dioxide gas; a valve element (9) for opening and closing the gas nozzle opening; a first coiled spring (19) for urging the valve element in a first direction; a first piston (17) movably mounted in a cylinder section (28) and moving the valve element; a second coiled spring (30) for urging the piston toward the valve element; and a pressure control chamber (23) formed between the first piston and the gas nozzle opening.  The pressure control chamber is filled with the carbon dioxide gas from the gas cartridge, and the pressure of the compressed carbon dioxide gas is controlled to a specific level.