Abstract: An air gun includes a gun body; a stock extending rearward from the gun body; a trigger extending downward from the gun body; a gas cartridge containing pressurized gas disposed in the stock; a magazine releasably secured to the gun body; an actuator including a spring biased sliding bar including an external handle, a protrusion projecting downward from the sliding bar, a spring biased sliding rod disposed under the sliding bar, and a sliding block engaging the sliding rod and including a protuberance facing the gas cartridge; and a safety mechanism disposed adjacent to a trigger and including a safety lever, a cam disposed at one end of the safety lever and being co-rotatable with the safety lever, the cam having an annular shoulder, a spring biased rod aligned with the safety lever and spaced from the cam in an inoperative position.

Abstract: An air gun includes a gun body; a stock extending rearward from the gun body; a trigger extending downward from the gun body; a gas cartridge containing pressurized gas disposed in the stock; a magazine releasably secured to the gun body; an actuator including a spring biased sliding bar including an external handle, a protrusion projecting downward from the sliding bar, a spring biased sliding rod disposed under the sliding bar, and a sliding block engaging the sliding rod and including a protuberance facing the gas cartridge; and a safety mechanism disposed adjacent to a trigger and including a safety lever, a cam disposed at one end of the safety lever and being co-rotatable with the safety lever, the cam having an annular shoulder, a spring biased rod aligned with the safety lever and spaced from the cam in an inoperative position.

Abstract: An air pistol is provided with a hollow connector in a first chamber and releasably secured to a gas cartridge, the connector including an axial channel; a pressure stabilization assembly including a pressure stabilization chamber between the connector and the trigger, a spring biased cup in the first chamber, a sealing member on a bottom of the cup, and outlets between the sealing member and the connector; and a relief valve in a second chamber and including a passageway communicating the pressure stabilization chamber with one end of the second chamber, a spring biased plunger in the second chamber adjacent to the passageway, a blocking member fastened in the plunger and proximate to one end of the second chamber, a pressure adjustment screw at the other end of the second chamber, and an exit tunnel through the pressure adjustment screw to communicate with the second chamber.

Abstract: An air pistol is provided with a gas cartridge including a reservoir and upper internal threads; a valve including lower external threads releasably secured to the internal threads, a lengthwise central channel, an inclined tunnel having one end communicating with the channel and the other end terminated at an outer surface of the valve, and an inverted L-shaped passage communicating with the channel; a spring actuated plunger slidably disposed in the valve and including at least one upper outlet; a sealing member disposed under the plunger and fastened in the channel; and an elongated, hollow connector disposed in the air pistol and inserted into the channel to push the plunger toward the sealing member so as to create a fluid path from the reservoir, the passage, the at least one upper outlet, and the channel to the hollow connector.

Abstract: An air pistol is provided with a gas cartridge including a reservoir and upper internal threads; a valve including lower external threads releasably secured to the internal threads, a lengthwise central channel, an inclined tunnel having one end communicating with the channel and the other end terminated at an outer surface of the valve, and an inverted L-shaped passage communicating with the channel; a spring actuated plunger slidably disposed in the valve and including at least one upper outlet; a sealing member disposed under the plunger and fastened in the channel; and an elongated, hollow connector disposed in the air pistol and inserted into the channel to push the plunger toward the sealing member so as to create a fluid path from the reservoir, the passage, the at least one upper outlet, and the channel to the hollow connector.

Abstract: An air pistol is provided with a hollow connector in a first chamber and releasably secured to a gas cartridge, the connector including an axial channel; a pressure stabilization assembly including a pressure stabilization chamber between the connector and the trigger, a spring biased cup in the first chamber, a sealing member on a bottom of the cup, and outlets between the sealing member and the connector; and a relief valve in a second chamber and including a passageway communicating the pressure stabilization chamber with one end of the second chamber, a spring biased plunger in the second chamber adjacent to the passageway, a blocking member fastened in the plunger and proximate to one end of the second chamber, a pressure adjustment screw at the other end of the second chamber, and an exit tunnel through the pressure adjustment screw to communicate with the second chamber.

Abstract: A model helicopter includes a drive mechanism comprising a battery powered motor comprising a toothed motor shaft; a main rotor comprising a main shaft aligned with the motor shaft and including a main gear; and a reduction gear assembly comprising a lower section including four first gears arranged around the motor shaft, and four second gears smaller than the first gears, each second gear fixed to top of the first gear; an upper section including four third gears and four fourth gears each being smaller than the third gear and fixed to top of the third gear, the fourth gears being meshed with the main gear; and four shafts each axially passing through the fourth gear, the third gear, the second gear, and the first gear so that a revolution of the motor shaft rotates the main shaft via the first gears, the fourth gears, and the main gear.

Abstract: An airsoft gun includes a stock and barrel assembly including a rear compressed propellant gas container having a seal, a spring biased striker disposed forwardly of the seal, a chamber disposed forwardly of the striker, a sliding weight in the chamber, a receiver disposed forwardly of the chamber, and an annular trough on an inner surface of a forward portion of the gun; a spring biased cap member locked at a forward opening; a pistol grip extending laterally out of the receiver and including two opposite three-section slots on a surface; a magazine assembly in the pistol grip; a and trigger assembly at bottom of the pistol grip and including a spring biased spacer engaging the bottom pellet, a cap element at the bottom of the pistol grip, and two safety pins through the cap element and the slots to lockingly urge against the spacer in a safe position.

Abstract: A model helicopter includes a drive mechanism, the drive mechanism comprising a battery powered motor comprising a toothed motor shaft; a main rotor comprising a main shaft aligned with the motor shaft, the main shaft including a main gear; and a reduction gear assembly comprising four lower first gears arranged around the motor shaft, a lower outer ring gear meshed with the first gears, four lower second gears each being smaller than the first gear and fixed to top of the first gear, four upper third gears, an upper outer ring gear meshed with the third gears, four upper fourth gears each being smaller than the third gear and fixed to top of the third gear, the fourth gears being meshed with the main gear, and four shafts each axially passing through the fourth gear, the third gear, the second gear, and the first gear.

Abstract: A CVT of radio-controlled car includes a drive assembly operatively connected to an electric motor and comprising a fixed disc and a co-axial moveable disc; an idler assembly operatively connected to the main shaft and comprising a fixed inner disc and a co-axial moveable outer disc; a belt rotatably mounted around the drive assembly and the idler assembly; a convex disc mounted besides the drive assembly distal the fixed disc; a main spring biased between the convex disc and the moveable disc wherein an internal space defined by the convex disc and the moveable disc is substantially closed; a rotatable steel ball engaged with the main spring; a receptacle disposed externally of the idler assembly; and a spring member biased between the receptacle and a central portion of the outer disc.

Abstract: A model helicopter includes a drive mechanism comprising a battery powered motor comprising a toothed motor shaft; a main rotor comprising a main shaft aligned with the motor shaft and including a main gear; and a reduction gear assembly comprising a lower section including four first gears arranged around the motor shaft, and four second gears smaller than the first gears, each second gear fixed to top of the first gear; an upper section including four third gears and four fourth gears each being smaller than the third gear and fixed to top of the third gear, the fourth gears being meshed with the main gear; and four shafts each axially passing through the fourth gear, the third gear, the second gear, and the first gear so that a revolution of the motor shaft rotates the main shaft via the first gears, the fourth gears, and the main gear.

Abstract: A model helicopter includes a drive mechanism, the drive mechanism comprising a battery powered motor comprising a toothed motor shaft; a main rotor comprising a main shaft aligned with the motor shaft, the main shaft including a main gear; and a reduction gear assembly comprising four lower first gears arranged around the motor shaft, a lower outer ring gear meshed with the first gears, four lower second gears each being smaller than the first gear and fixed to top of the first gear, four upper third gears, an upper outer ring gear meshed with the third gears, four upper fourth gears each being smaller than the third gear and fixed to top of the third gear, the fourth gears being meshed with the main gear, and four shafts each axially passing through the fourth gear, the third gear, the second gear, and the first gear.

Abstract: A firing frequency controller which includes a cylinder body, a piston assembly, and a unidirectional seal is provided. The cylinder body includes a first orifice, a second orifice and a third orifice, wherein the gas flux through the first orifice and the third orifice are inequality. The piston assembly disposed inside said cylinder body is repeatedly moved. The unidirectional seal is disposed at outside of the piston and adjacent to the inner wall of the cylinder body. The unidirectional seal is contacted with the cylinder body and is kept airtight while moved at one direction. The unidirectional seal is not contacted with the cylinder body and kept non-airtight while moved at another direction. Because of pressure difference, the velocity of piston assembly can be adjusted and then the firing frequency of toy gun can be controlled.

Abstract: A pneumatic toy gun with a hammer assembly disposed inside a barrel is provided. The hammer assembly includes a first hammer and a second hammer, wherein the first hammer is disposed in front of the second hammer and the second hammer includes a notch. A first elastic element pushes the rear end of the first hammer and a second elastic element pushes the rear end of the second hammer. A first tackling block is disposed below the hammer assembly and rotatable around the pivot. The rear end of the first tackling block is stuck into the notch of the second hammer. A second tackling block is disposed adjacent to the first tackling block and includes a trough allowing the pivot to be disposed in. The rear end of the second tackling block is stuck into the notch of the second hammer. A third elastic element pushes the underneath of the rear half portion of the first tackling block. A fourth elastic element pushes the underneath of the rear half portion of the second tackling block.

Abstract: A firing frequency controller which includes a cylinder body, a piston assembly, and a unidirectional seal is provided. The cylinder body includes a first orifice, a second orifice and a third orifice, wherein the gas flux through the first orifice and the third orifice are inequality. The piston assembly disposed inside said cylinder body is repeatedly moved. The unidirectional seal is disposed at outside of the piston and adjacent to the inner wall of the cylinder body. The unidirectional seal is contacted with the cylinder body and is kept airtight while moved at one direction. The unidirectional seal is not contacted with the cylinder body and kept non-airtight while moved at another direction. Because of pressure difference, the velocity of piston assembly can be adjusted and then the firing frequency of toy gun can be controlled.

Abstract: A pneumatic toy gun with a hammer assembly disposed inside a barrel is provided. The hammer assembly includes a first hammer and a second hammer, wherein the first hammer is disposed in front of the second hammer and the second hammer includes a notch. A first elastic element pushes the rear end of the first hammer and a second elastic element pushes the rear end of the second hammer. A first tackling block is disposed below the hammer assembly and rotatable around the pivot. The rear end of the first tackling block is stuck into the notch of the second hammer. A second tackling block is disposed adjacent to the first tackling block and includes a trough allowing the pivot to be disposed in. The rear end of the second tackling block is stuck into the notch of the second hammer. A third elastic element pushes the underneath of the rear half portion of the first tackling block. A fourth elastic element pushes the underneath of the rear half portion of the second tackling block.

Abstract: A blowgun, which is used for firing bullets, comprising: a grip which is comprised a loading gate, a lead pipe, and a guiding flange; a trigger which is installed slidably at the grip, and a interference bar is installed at a part of the trigger, which is formed in the inner of the grip; a mouthpiece which is comprised a tubular part at one end thereof and a conical part at another end thereof; a barrel; a pushing bar which is installed slidably in the lead pipe and can be slid between the mouthpiece and the barrel; and a first recoil spring which is installed in the lead pipe; wherein the lead pipe is formed at the rear of the barrel and through inner of the grip; the loading gate is connected to the lead pipe; the guiding flange is installed in the grip; the tubular part is coupled together with the lead pipe; and during an interval the trigger being compressed, the interference bar of the trigger brings the pushing bar to approach the mouthpiece and to compress the first recoil spring until a chamber which