| 摘要 |
It is possible, in an automatic air gun, to reduce a piston block's size and effectively use a compressed gas' pressure. A change valve and a open-close valve are positioned below a cylinder block. A change valve closing portion is exposed in a change valve gas chamber. The change valve is located so only a rod portion is positioned in the change valve gas chamber. When the compressed gas is supplied to a bullet discharge ventilating opening side, through the change valve gas chamber, the closing portion opens a bullet discharge air-supply opening thereby allowing the compressed gas to flow to the bullet discharge air-supply opening. When the compressed gas is supplied to a blow-back ventilating opening, the closing portion makes a blow-back air-supply opening change to the opening state; the change valve rod prevents supply of the compressed gas to the change valve gas chamber.
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