Patent ID: 7267119
Filing Date: 2007-09-11
Classification: F41B

Abstract:
1. An air gun, comprising: a slide, provided in an upper part of a gun, capable of sliding parallel to a barrel; a cylinder portion, formed of a cylinder that is open at a muzzle side and closed off a gun rear end side, fixed to a gun rear end side of the slide; a hit pin provided projecting from a hollow inner portion of the cylinder portion to a gun rear end side, and capable of sliding in a nozzle direction, a hollow valve pin chamber fixed to the gun body so as to be positioned in the hollow inner portion of the cylinder portion; a valve body having a first through hole passing through from a muzzle side to a gun rear end side at a smaller diameter than the valve pin chamber, the first through hole comprises a muzzle side through hole and a rear end side through hole; a gas supply port, opened to a cylindrical peripheral surface of the valve pin surface, for normally supplying compressed gas to the valve pin chamber of the valve body; a valve pin, formed as a cylinder having a second through hole, provided inside the valve pin chamber, urged normally to the gun rear end side and having a bullet feed nozzle insertion section formed at a muzzle side, and inserted into the muzzle side through hole of the valve pin chamber to project, and a pin body having a valve pin flange section, capable of sliding in an air-tight state with the muzzle side through hole of the valve pin chamber, and contacting a gun rear end side surface of the valve pin in an air-tight manner at the gun rear end side, wherein the valve pin communicates with a muzzle side providing a valve pin chamber side opening that opens to a pin body side surface at a muzzle side of a pressing section provided in the pin body; a pressing section, provided at a gun rear end side of the pin body, fixed to the valve body, inserted into a rear end side of the second through hole to project, positioned so that a tip end of a gun rear side of the pressing section is adjacent to the hit pin, and capable of passing compressed gas from a clearance between the rear end side of the second through hole; a bullet feed nozzle link connected to a trigger; and a bullet feed nozzle, formed as a cylinder, inserted into a bullet nozzle insertion section of a valve pin nozzle side projecting to a nozzle side of the valve pin chamber, forming a rib-shaped bullet feed nozzle link engagement projection for engaging with the bullet feed nozzle link at an outer periphery of a gun rear end side, and being capable of sliding in the valve pin muzzle side bullet feed nozzle insertion section in order to load a bullet in the chamber in response to movement of the trigger and the bullet feed nozzle link, wherein when the hit pin is pressed to the muzzle side and made to slide to the muzzle side, the valve pin slides to the muzzle side against urging force to release an airtight state between the valve pin flange section and the gun rear end side side surface of the valve pin chamber, compressed gas supplied to the valve pin chamber from the gas supply port is supplied from between the valve pin chamber gun rear end side side surface and the valve pin flange section to the valve pin chamber side opening, and a bullet is fired from the muzzle by passing compressed gas through the bullet feed nozzle insertion section to the muzzle side of the bullet feed nozzle, and compressed gas is supplied from a clearance between the pressing section and the rear end side of the second through hole into which the pressing section is inserted to the gun rear end side to cause the cylinder section to move to the gun rear end side.