Metering valve mechanism of aerosol container and aerosol type product with said metering valve mechanism

A metering valve mechanism of an aerosol container comprising:

• a metering chamber defined by an inner housing and an outer housing located at an outer side of the inner housing;
• a stem accommodated in an inner housing, the stem configured to shift from a stationary mode in which the stem is biased by a first elastic member to a propelling mode to thereby transition a metering chamber formation seal valve from an open state to a closed state where communication is closed between the metering chamber and a contents accommodation space region located upstream of the metering chamber;
• and shift of the stem from the propelling mode to the stationary mode causes communication to close between the inner housing and the stem, wherein
• the inner housing consists of:
• a tube section that is provided to surround the stem and that sets an inner annular space region forming a portion of the metering chamber between the inner peripheral surface thereof and the outer peripheral surface of the stem;
• the outer housing consists of:
• a sheath section that is provided at the outer side of the inner housing and that sets an outer annular space region forming a portion of the metering chamber;
• the outer annular space region defined between an inner peripheral surface of the outer housing and an outer peripheral surface of the inner housing;
• and
• an annular ceiling part that has an upper longitudinal hole communicating with the outer annular space region;
• the outer annular space region consists of:
• an annular piston having a first face part that receives pressure from to be-propelled contents and a second face part that receives pressure from propellant via the upper longitudinal hole;
• and
• at least an end of the first face part having a first inner annular seal section providing a seal with the outer peripheral surface of the inner housing and a first outer annular seal section providing a seal with the inner peripheral surface of the outer housing, and
• the seal valve is configured so that:
• in a contents filling mode in which the contents are filled via the stem path and the inner housing, the seal valve is moved by the strength of the flow of the filled contents in a direction away from the stem to allow the filled contents to flow into the contents accommodation space region.