Abstract:
An airsoft gun structure redesigns the conventional high-pressure toy gun to shunt high-pressure air flow during shooting. Therefore, the shunted high-pressure air flow simulates recoils as real bolt-action, single-shot rifles. Also, the ammunition supply includes different cartridges to select one of the supply-type by the users and whether shell case ejection or not. When the airsoft gun is operated, the realistic action is achieved to enhance the fun of shooting. Furthermore, the dual hop up system makes the flight path of bullets more stable without shift. Moreover, the safety gasification system could make the supplied amount of the output compressed high pressure air be almost constant to enhance security during operation.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of Invention 
     The present invention relates to an airsoft gun, more particularly to the airsoft gun with improved reality. 
     2. Related Art 
     A survival game has already been a leisure activity which people are often taking People can use toy guns in hands to emulate a real field combat situation and can play team games with others to develop a tacit understanding of the games and to obtain an entertainment effect. The toy gun usually uses air as its power source to achieve a shooting effect by air to drive the bullets in a frame and the power source can keep providing to the toy gun using only a gas cylinder in the clip, when shooting. 
     There is significant commercial demand for toys that can fire hard plastic BB projectiles. A category of such toys are known in the art as so-called “airsoft” guns. Although the BB projectiles comprise hard plastic, they are less dangerous than metal BB projectiles because they are less massive and therefore carry less momentum at a given velocity. Hence, airsoft players often fire airsoft guns at other players during airsoft games and competitions, without significant injury (so long as eyes are well protected). 
     Furthermore, a current virtual-reality field shooting exercise has been one of the popular recreation activities, wherein players are pursuing a feeling as if shooting with a real gun, thereby enabling a pulling of a trigger to become one of the indispensable factors. 
     Accordingly, how to solve the aforementioned problems is a technical issue to be resolved by the inventor of present invention. 
     SUMMARY OF THE INVENTION 
     It is an objective of this invention to provide an airsoft gun with a gas shunting system. The gas shunting system divides a compressed high pressure air to drive out a projectile and guide to move a hammer block to generate impact for simulating recoil motion after shooting. 
     Another objective of this invention is to provide an airsoft gun with a dual hop up system to make the flight path be more stable and to enhance the flight range and accuracy. 
     It is an objective of this invention to provide an airsoft gun with a refilling system. The refilling system includes a dual magazine assembly for housing two different cartridges. The first magazine is capable of housing ball bullets and the second magazine is capable of housing ball bullets with shell cases. 
     It is an objective of this invention to provide an airsoft gun with a gasification system could make the supplied amount of the output compressed high pressure air be almost constant to enhance security during operation. 
     In order to implement the abovementioned, this invention discloses an airsoft gun with a dual hop up (DHU) system, a recoil motion system, a gasification system, a refilling system, and a gas shunting system. The airsoft gun further comprises an inner barrel and an outer barrel. The outer barrel has an air inlet and an air outlet, a back block, a front block and the hammer block are disposed between the inner barrel and the outer barrel. A hammer block spring is attached to an inner surface of the back block in the inner barrel. At the end of the hammer block spring on the opposite side to the back block, the hammer block is attached. The compressed high pressure air are guided from the air inlet to move the hammer block. The compressed high pressure air is released from the air outlet when the hammer block punches the back block. The hammer block spring pushes the hammer block back to punch the front block to generate impact for simulating recoil motion. 
     The dual hop up system includes a first boss portion, located at the inner surface of the inner barrel near to a bore of the airsoft gun to make a projectile rotate to increase its range of flight, and a second boss portion, located at the inner surface of the inner barrel and adjacent to the first boss portion to correct a rotating axis of the projectile to make the flight path be more stable. 
     The gasification system includes a compressed gas cartridge and a vaporization tube. One end of the vaporization tube is exposed to the compressed gas cartridge and the other end is extended into the compressed gas cartridge near to a substantial center therein to make the supplied amount of output compressed high pressure air be constant. The distance between the end of the vaporization tube and a liquid air inside the compressed gas cartridge is the same to make a pressure of a gaseous air be constant to enhance security during operation. 
     Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will become more fully understood from the detailed description given hereinbelow illustration only, and thus are not limitative of the present invention, and wherein: 
         FIG. 1  is respective view of the airsoft gun in accordance with the present invention; 
         FIGS. 2A-2B  are respective views of the refilling system in accordance with the present invention when the first magazine is utilized; 
         FIGS. 2C-2E  are respective views of the refilling system in accordance with the present invention when the second magazine is utilized; 
         FIGS. 3A-3B  are sectional views of the dual hop up (DHU) system in accordance with the present invention; 
         FIGS. 4A-4D  are sectional views of the simulating recoil motion in accordance with the present invention; and 
         FIGS. 5A-5D  are respective views of the gasification system in accordance with the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     The purpose, construction, features, and functions of the invention can be appreciated and understood more thoroughly through the following detailed description with reference to the attached drawings. 
     Please refer to  FIG. 1 , the airsoft gun of the present invention includes a gun body  1  with a dual hop up (DHU) system  2 , a recoil motion system  3 , a gasification system  4 , a refilling system  5 , and a gas shunting system  6 . 
     Please see  FIGS. 2A-2E , the refilling system  5  of the present invention includes a dual magazine assembly  50  for housing two different cartridges. The first magazine  50   a  is capable of housing ball bullets  90  and the second magazine  50   b  is capable of housing ball bullets  90  with shell cases  60 . 
     Please refer to  FIGS. 2A-2B , which are respective views of the refilling system in accordance with the present invention when the first magazine is utilized. 
     The first magazine  50   a  is a hollow member with one end being a closed end  51   a  and is capable of housing ball bullets  90  therein. A magazine spring  52   a  is attached to the inner surface of the closed end  51   a  in the first magazine  50   a . At the end of the magazine spring  52   a  on the opposite side to the closed end  51   a , a magazine follower  53   a  that pushes ball bullets  90  is attached. The first magazine  50   a  includes a hollow slider  54  to hold the ball bullets  90 . The Ball bullets  90  are guided away from the first magazine  50   a  through an opening provided by the slider  54 . 
     The first action  70   a  includes a shell case front end  60   a . The shell case front end  60   a  has a through hole  62   a  with an opening  61   a . When the first action  70   a  is pushed, the first one ball bullet  90 , which is slightly outside of the slider  54 , would be mounted on the opening  61   a  of the shell case front end  60   a  of the first action  70   a . The slider  54  is pushed downward to the first magazine  50   a  along to the sidewall of the first action  70   a . Then, the ball bullet  90  is pushed into the bore  80  to refill. 
     After shooting, the ball bullet  90  is shot and the first action  70   a , including the shell case front end  60   a , is pulled back to leave away from the bore  80 . The slider  54  would move upward along to the sidewall of the first magazine  50   a . And one of the ball bullets  90  inside the first magazine  50   a  is pushed to be slightly outside of the top end of the slider  54 , as shown in  FIG. 2A . Therefore, even the bullets are ball bullets  90 , such as BB bullets, steel balls or paintballs, the airsoft gun could simulate refilling action as real bolt-action, single-shot rifles to increase the reality. 
     Please refer to  FIGS. 2C-2E , which are respective views of the refilling system in accordance with the present invention when the second magazine is utilized. 
     In this embodiment, a second magazine  50   b  is located adjacent to the first magazine  50   a . The second magazine  50   b  is also a hollow member with one end being a closed end  51   b  and is capable of housing ball bullets  90  with shell cases  60  therein. A magazine spring  52   b  is attached to the inner surface of the closed end  51   b  in the second magazine  50   b . At the end of the magazine spring  52   b  on the opposite side to the closed end  51   b , a magazine follower  53   b  that pushes ball bullets  90  with shell cases  60  is attached. The Ball bullets  90  with shell cases  60  are guided away from the second magazine  50   b  through an top opening thereof. 
     The second action  70   b  includes a jaw  71   b  and a case ejector  72   b  at the front end. When the second action  70   b  is pushed, the first one ball bullet  90  with shell case  60  would be pushed toward into the bore  80 . And the bullet groove  61  is clipped by the jaw  71   b  to refill. And the shell case  60  has a through hole  62 . 
     After shooting, the ball bullet  90  is shot and the second action  70   b  together with the shell case  60  are pulled back to leave away from the bore  80 . The shell case  60  is ejected by the case ejector  72   b . Therefore, in this embodiment, the airsoft gun could simulate refilling and ejecting actions as real bolt-action, single-shot rifles to increase the reality. 
     Moreover, the refilling system  5  of the present invention includes a dual magazine assembly  50  for housing two different cartridges. Each cartridge is utilized a different action, the first action  70   a  and the section action  70   b . The users can change actions depends on which cartridge is utilized. 
     Please refer to  FIGS. 3A-3B , which are sectional views of the dual hop up (DHU) system in accordance with the present invention. 
     The dual hop up (DHU) system  2  includes a first boss portion  21  and a second boss portion  22  at an inner surface of the inner barrel  20 . The first boss portion  21  is located at the inner surface of the inner barrel  20  near to the bore  80 , i.e. the right side in  FIG. 3A . When the ball bullet  90  enters into the inner barrel  20 , the friction occurred between the first boss portion  21  and the ball bullet  90  would make the ball bullet  90  rotate to increase its range of flight. As shown in  FIG. 3A , the ball bullet  90  would rotate counter-clockwise. The second boss portion  22  is located at the inner surface of the inner barrel  20  and adjacent to the first boss portion  21 . The function of the second boss portion  22  is different from the function of the first boss portion  21 . When the ball bullet  90  enters into the inner barrel  20 , the initial velocity is very high. During friction of the first boss portion  21 , the friction point may not be the center point of the ball bullet  90  to cause the rotating axis of the ball bullet  90  to be shift. The flight path would be unstable. Therefore, by the second boss portion  22 , the rotating axis of the ball bullet  90  is corrected to make the flight path be more stable, especially is horizontal flight path. 
     Please refer to  FIG. 3B , the first boss portion  21  includes a single protrusion to make the ball bullet  90  rotate. And the second boss portion  22  includes a plurality of protrusions. As shown in  FIG. 3B , the second boss portion  22  includes two protrusions to make the ball bullet  90  rotate and fly more stable. The material of the protrusions is elastics material, such as rubber. The height of the protrusions may be adjustable to modify the friction between the protrusions and the ball bullet  90  to enhance the flight range and accuracy. 
     Please refer to  FIGS. 4A-4D , which are sectional views of the simulating recoil motion in accordance with the present invention. 
     When the airsoft gun is triggered, a delay mechanism is enabled. The delay mechanism includes an air valve  30 , a pin  31 , a collapsing spring  32 , a relief lever  33  and a valve spring  35 . The air valve  30  is opened when the airsoft gun is triggered, and the pin  31  is moved down to be against the air valve  30  to keep the air valve  30  opening. The compressed high pressure air are shunted by the gas shunting system  6 . The gas shunting system  6  is integrated with the gun body  1  of the airsoft gun. The compressed high pressure air are divided to drive out the ball bullets  90  and guide to the air inlet  11 . 
     The outer barrel  10  has the air inlet  11  and the air outlet  12 . A back block  23 , a front block  29  and a hammer block  24  are disposed between the inner barrel  20  and the outer barrel  10 . The hammer block  24  is a sleeve member to be put on the inner barrel  20 . A hammer block spring  25  is attached to the inner surface of the back block  23  in the outer barrel  10 . At the end of the hammer block spring  25  on the opposite side to the back block  23 , the hammer block  24  is attached. An outer ring  26  and an inner ring  27  are disposed to the hammer block  24  to make contact with the inner surface of the outer barrel  10  and the outer surface of the inner barrel  20  respectively. A chamber  28  within the outer barrel  10  is formed by the front block  23 , the outer ring  26  and the inner ring  27 . The hammer block  24  is moveable along the inner barrel  20  between the front block  29  and the back block  23 . When the compressed high pressure air are guided into the chamber  28  from the air inlet  11 , the hammer block  24  is pushed to slide along the inner barrel  20 . The hammer block spring  25  is pressed and the gun body  1  is moved forward slightly due to the reacting force. 
     When the hammer block  24  slides toward the back block  23  and pushes a collapsing slider  321  of the collapsing spring  32 , the collapsing slider  321  would be moved downward along to the inclined plane  322  of the collapsing spring  32 . The collapsing spring  32  is moved backward to push the relief lever  33  to lift the pin  31 . When the pin  31  is lifted, the air valve  30  is released by the valve spring  35  to be closed. The compressed high pressure air is stopped to be supplied. By the inclined plane  322  of the collapsing spring  32 , the hammer block  24  slides to push the collapsing slider  321  of the collapsing spring  32  without crash the delay mechanism. Furthermore, by the delay mechanism, the compressed high pressure air are still supplied to push the hammer block  24  after the ball bullets  90  are driven out. 
     After the delay mechanism is released, the hammer block  24  still slides to punch the back block  23  to generate impact. The compressed high pressure air within the chamber  28  is released by the air outlet  12 , as shown in  FIG. 4C . After the compressed high pressure air within the chamber  28  is released, the hammer block spring  25  pushes the hammer block  24  back due to the spring force of compression. The gun body  1  is moved backward slightly due to the reacting force. The hammer block  24  still slides to punch the front block  29  to generate impact. Therefore, by those impact and the reacting force, the airsoft gun could simulate recoil motion after shooting as a real gun to increase the reality. 
     The hammer block  24  includes an inclined groove  241  at the outer surface and the outer ring  26  is disposed therein. During the hammer block  24  slides toward the back block  23 , the outer ring  26  is moved along the inclined groove  241  to increase airtight performance. The transformation caused by temperature of the outer ring  26  to decrease airtight performance would be overcome. And the recoil motion performance is also improved. 
     Please refer to  FIGS. 5A-5D , which are respective views of the gasification system in accordance with the present invention. 
     The airsoft gun is powered by a compressed gas cartridge  40 . The compressed gas cartridge  40  contains liquid air  42 . The liquid air  42  tends to flow to low position. 
     Therefore, angle for usage of the airsoft gun is limited. When the muzzle of the airsoft gun is lowered or heightened, the liquid air  42  may be stayed at the outlet or the bottom of the gas cartridge  40 . It causes the liquid air  42  to excess or too less output. It is dangerous and unstable for the airsoft gun. 
     The gasification system  4  includes a compressed gas cartridge  40 , and a vaporization tube  41 . One end of the vaporization tube  41  is exposed to the compressed gas cartridge  40 , and the other end is extended into the compressed gas cartridge  40  near to the center therein, a balance point. Because the distance to the liquid air  42  is near the same in each angle of the compressed gas cartridge  40 , the pressure of the gaseous air  43  is constant. Therefore, whatever the angle of the compressed gas cartridge  40  is, the supplied amount of the output compressed high pressure air is almost constant. 
     Please refer to  FIGS. 5A-5D , the compressed gas cartridge  40  stays at 180 degrees, 45 degrees, 90 degrees, and 270 degrees, respectively. Without the vaporization tube  41 , the output pressure may be too low as shown in  FIGS. 5B-5C , due to the liquid air  42  is too far to the outlet. The liquid air  42  may be leaked directly without vaporization, as shown in  FIG. 5D . By the vaporization tube  41  of this invention, the distance between the vaporization tube  41  to the liquid air  42  is near the same in each angle. The pressure of the gaseous air  43  is constant. The supplied amount of the output compressed high pressure air is almost constant. Especially is at 270 degrees shown in  FIG. 5D , the vaporization tube  41  keeps the liquid air  42  without leaking. Hence, the security during operation is enhanced. 
     The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.