Patent ID: 7549416

Claim:
A launch vehicle, comprising: an air pump including a cylinder having an upper end formed with an air outlet connected to an inside of the cylinder and a lower end provided with a piston rod movable in the inside of the cylinder; an injection valve mounted on the air pump and including a positioning seat having a first end provided with an air nozzle inserted into the air outlet of the cylinder and a second end formed with a positioning recess, a plurality of flexible locking members each mounted on the positioning seat and each retractably extended into the positioning recess of the positioning seat, and a press ring movably mounted on the positioning seat and movable between a first position where the press ring is rested on the locking members to press the locking members into the positioning recess of the positioning seat and a second position where the press ring is detached from the locking members to release the locking members from the positioning recess of the positioning seat; a connecting member mounted between the air outlet of the cylinder of the air pump and the positioning seat of the injection valve to attach the injection valve to the air pump; a trigger secured to the press ring of the injection valve to move the press ring; a projectile detachably mounted on the injection valve and including a mounting seat detachably mounted on the positioning seat of the injection valve, and a projectile body mounted on the mounting seat, wherein the mounting seat of the projectile is provided with a plug inserted into the positioning recess of the positioning seat and detachably locked by the locking members of the injection valve.