JPS63150593A - Projectile launcher for gas gun - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bullet firing device for a gas gun capable of firing a large number of bullets using compressed gas such as air.

(Prior Art) Generally, a gas gun fires a plastic or metal bullet using the pressure of compressed air or gas. Recently, rapid-fire type bullets have become popular, in which a valve provided in an air passage is connected to a trigger, and bullets are fired continuously while the trigger is pulled.

FIG. 2 shows a conventional bullet firing device for a continuous-fire gas gun. In this firing device, a cylinder 2 is coaxially provided at the rear end of a gun barrel 1, and an O-ring 3 is interposed between the gun barrel 1 and the cylinder 2 in a radially compressed state. Also, gun barrel 1
The cylinder 2 is slidably inserted into a hole 5 of the housing 4, and an annular groove 6 is formed at the tip of the hole 5. The gun barrel 1 is pushed to the right in FIG. 2 by the biasing force of the return spring 7, and a cushioning coil spring 8 is also inserted at the rear end of the cylinder 2.

On the other hand, the tube 10 of the magazine 9 is filled with bullets 11 continuously, and the force of the internal coil spring 12 causes the leading bullet to
1 is in pressure contact with the O-ring 3.

An annular seal 13 is fitted around the distal end of the tube 10 to seal the space between it and the joint 14 on the main body side. Further, a slider 15 that is movable in the axial direction is fitted into the magazine 9, and the slider 15 is pushed upward by a coil spring 16. Furthermore, a hole 17 is formed in the side surface of the tube 10 into which a ball 18 is inserted, and a groove 19 is also provided in the inner surface of the slider 15.

The magazine 9 can be inserted into the joint 14 in a cassette style, and - before setting, the slider 15 is in contact with the step 10A of the tube 10, and the balls 18 are in contact with the tube 10.
0 and prevents the bullet 11 from flying out.

On the other hand, although not shown, a vibrator and a valve for supplying air are connected to the rear end of the cylinder 2, and the valve and the trigger are interlocked.

Therefore, when the magazine 9 is first inserted into the joint 14, the slider 15 hits the end face of the joint and slides downward, causing the groove 19 to slide downward.
The holes 17 communicate with each other. Therefore, the ball 18 moves to the groove 19 and the bullet 11 is pushed into the joint 1 by the biasing force of the coil spring 12.
4 and stops with the leading bullet 11 in pressure contact with the O-ring 3.

Next, when the user pulls the trigger, the valve opens and air is sent to the cylinder 2, and the pressure of the air causes the ball 11, O-ring 3, and barrel 1 to move forward in the hole 5 of the housing 4. Therefore, the compressed O-ring 3 reaches the annular groove 6 of the hole 5 and enters the annular groove 6 while expanding, so that the bullet 11 is continuously fired by air. Also, when you release your finger from the trigger, the valve closes and the air supply is cut off.

Therefore, the gun barrel 1 and the O-ring 3 return to their original positions due to the biasing force of the return spring 7, and the O-ring 3 is also compressed again and the bullet 1
1 is prevented from moving.

(Problem to be Solved by the Invention) However, the bullet firing device described above requires one gun barrel to be fired each time a bullet is fired.
Since the barrel 1 slides, the stability of the gun barrel 1 deteriorates, causing a problem in accuracy. Further, since the O-ring 3 slides together with the gun barrel 1 while being pressed against the inner surface of the hole 5, there is a drawback that the O-ring 3 wears out in a short period of time.

The present invention was made in view of the above circumstances, and its purpose is to improve accuracy by fixing the barrel of a gun, and to improve the accuracy of firing.
An object of the present invention is to provide a bullet firing device for a gas gun that can prevent ring wear.

(Means for Solving the Problems) In order to achieve the above object, the bullet firing device for a gas gun according to the present invention includes a chamber that is provided in communication between the gun barrel and the bullet supply side and has an annular groove inside. an O-ring that fits into this annular groove and has an inner diameter slightly smaller than the bullet; a plurality of holes that penetrate from the annular groove to the outer surface of the chamber; and an O-ring that is inserted into these holes and has an inner diameter that is slightly smaller than the bullet. A cylinder that has a gas passage communicating with the chamber and is slidably fitted into the chamber, a groove formed on the inner surface of the cylinder into which the ball fits when the cylinder retreats, and a bullet supply means for pressurizing the O-ring to block the gas passage; a gas supply means for supplying operating gas to the gas passage of the cylinder;
It consists of a valve provided in a part of the gas passage, a trigger means for opening and closing the valve, and a return means for returning the retracted cylinder to its original position using gas pressure.

(Operation) With these configurations, when the user pulls the trigger, the valve is opened and the working gas enters the passage, first retracting the cylinder. As the cylinder retreats, the multiple balls pressing the O-ring enter the groove of the cylinder, the O-ring is unfastened, and the bullet is fired. As the internal pressure on the air supply side decreases as the bullet is fired, the cylinder returns to its original position due to the return spring, and the next bullet comes into pressure contact with the O-ring again. During this time, air is being supplied sequentially, so this operation is repeated at extremely short intervals while the trigger is being pulled. The gun barrel does not move at all while the bullet is being fired, and the cylinder does not move while the cylinder is sliding.
The ring never comes into direct contact with the inner surface of the cylinder.

(Example) FIGS. 1 and 3 show an internal side view and an exploded perspective view of a gas gun 20 incorporating the bullet firing device of the present invention.

This gas gun 20 has a pair of symmetrical covers 21A on the outside,
21B and double force bar 21A.

Inside 21B, there is an elongated hole 23 for receiving the gun barrel 22,
A recess 24 for receiving a firing device and a hole 26 for placing a finger on a trigger 25 are formed. In addition, cover 21A,
A gun stock (not shown) is connected to the rear of 21B so that it can be used as a machine gun type.

A guide 27 is slidably fitted to the rear of the gun barrel 22, and the guide 27 is composed of a frame body 27A and a cylindrical portion 27B. As can be seen from FIG. 3, the frame 27A has an elongated U-shape with a hole 28 provided at the rear end. Cylindrical part 2
7B is inserted into the frame 27A and fixed to the frame 27A with the front end slightly protruding, and has a spring receiver 2 in the middle part.
9 is formed.

Further, as shown in an enlarged view in FIG. 4, a nut 30 for the spring receiver is fitted into the rear end of the barrel 22, and the spring receiver returns between the spring receiver 29 and the stepped portion 31 of the nut 30. A spring 32 is interposed. A screw 33 is formed on the inner surface of the rear end of the nut 30, and the tip of the housing 34 is screwed into this screw 33. Rearward movement of the nut 30 is restricted by a stopper 22A fixed to the barrel 22.

A chamber 36 is inserted into the housing 34 via an annular seal 35, and the tip of the chamber 3B fits into the rearmost end of the gun barrel 22. An annular groove 37 is formed on the rear inner surface of the chamber 36, and an O-ring 38 is inserted into the annular groove 37.

Further, as can be seen from FIG. 5(A), the chamber 36 has a plurality of holes 39 penetrating from the annular groove 37 to the outer surface of the chamber.
is provided, and a ball 40 is inserted into the porous hole 39.

The diameter of the balls 40 is slightly larger than the radial length of the hole 39, and five balls are used in this embodiment.

A cylinder 41 is fitted at the rear of the chamber 36, and an annular seal 42 is interposed between the cylinder 41 and the housing 34. A pin 43 passes through the rear end of the cylinder 41 at right angles to the axial direction, and both ends of the pin 43 pass through the guide groove 44 of the housing 34 (Fig. 6), and the hole 28 at the rear end of the guide (Fig. 3). ) is fitted. Furthermore, the cylinder 41
An annular groove 41A is formed on the inner surface of the front end.

Therefore, as shown in FIG. 6, since the nut 30 and the housing 34 are fixed, the guide 27 and the cylinder 4
1 is always urged forward (to the left) by a return spring 32. Furthermore, a cavity communicating with the chamber 36 is formed in the housing 34 and the cylinder 41, and these serve as an air passage 45 (FIG. 4).

A cassette-type magazine 46 is removably attached to the lower part of the housing 34, as shown in FIG. Inside the magazine 46, there is a U-shaped magazine tube 47.
A seal 49 is attached to the tip of the magazine tube 47 via a seal guide 48. Further, a pair of spring receivers 50° 51 and a coil spring 52 are inserted at the rear of the magazine tube 47.
A large number of bullets 53 are housed in a pressed state from the tube outlet to the tube outlet.

FIG. 7 shows an enlarged view of the magazine tube 47 before the magazine 46 is loaded into the main body. The seal 49 at the tip of the tube is made of a cylindrical elastic material, and has a stepped portion 54 on its inner surface, so that the projectile of the bullet 53 is prevented by the stepped portion 5.
It is blocked by 4. Further, a tapered portion 55 is formed on the inside of the tip end of the seal 49 so as to expand, so that the seal 49 has a shape that is easy to connect to a joint 56 (FIG. 4) on the housing side.

A guide 41B is arranged at the upper end of the joint 56 to prevent the next bullet from being sent each time the bullet 53 is fired one by one. The guide 41B is formed in front of the cylinder 41 and partially closes the outlet of the joint 56 when the cylinder 41 is retracted.

Therefore, when the magazine 46 is inserted from below the housing 34, the seal 49 expands and fits into the joint 56 as shown in FIG. 4, and at the same time, the blocking of the bullet 53 is released and the leading bullet 53 It presses against the O-ring 38. After setting the magazine 46, the spring-biased catch lever 57
This prevents the magazine 46 from falling out.

On the other hand, as shown in FIG. 4, a joint 58 communicating with the air passage 45 is connected above the housing 34, and a pipe 59 is connected to the joint 58. As seen in FIG. 1, the pipe 59 extends forward parallel to the gun barrel 22, then bends downward and is connected to a joint 62 of a hose 61 via a valve 60.

Although not shown, the other end of the hose 61 is connected to an air supply source such as a compressor.

An operating pin 63 for opening and closing protrudes from the front end of the valve 60, and the trigger 25 corresponds to the operating pin 63. 2 birds
5 is rotatably mounted around a support shaft 64, and when the user pulls the trigger 25, the actuating pin 63 is pushed and the valve 6
0 is released.

In front of the upper end of the trigger 25 is a stepped portion 6 as shown in FIG.
A trigger bridge 65 having a diameter of 5B is mounted, and the trigger bridge 65 together with the trigger 25 is biased clockwise by a torsion spring 66.

This trigger bridge 65 normally pivots around the support shaft 64, but when a large force is applied from below, it rotates slightly around the support shaft 65A. On both sides of the trigger bridge 65,
As can be seen from FIG. 9, a protrusion 67 is provided, and the protrusion 6
7 is in contact with the protrusion 69 of the sear 68. sear 68
is rotatably provided around a support shaft 70, and a latch portion 71 at the tip is locked to the front end of the guide 27 (FIG. 4).

Further, the sear 68 is biased counterclockwise by a torsion spring 72.

As shown in FIG. 4, the selector mechanism 73 locks the safety locks S1, single-shot E1, and three-shot F by operating the select button 74.
It is possible to switch between stages. An elongated arm 75 is integrally formed with the selector button 74, and the tip of the arm 75 is bent at a right angle (FIG. 9) to form a stopper 76.

Therefore, when the select button 74 is slid to the S position as shown in FIG. 1, the stopper 76 at the tip of the arm comes into contact with the lower part of the trigger bridge 65 and locks the rotation of the trigger 25. Since the stopper 76 is located directly below the support shaft 65A, the trigger bridge 65 is also prevented from rotating independently. Further, when the select button 74 is slid to the E or F position, the stopper 76 moves forward as shown in FIG. 4, and the trigger 25 and the trigger bridge 65 can be rotated.

The gas gun 20 of this embodiment configured as described above operates as follows.

First, when the select button 74 is set to F, that is, the continuous firing position and the trigger 25 is pulled, the trigger bridge 65 moves to the sear 6
8 downward, and the latch portion 71 of the sear 68 is disengaged from the tip of the guide 27.

At the same time, the valve 60 is opened, and air is supplied into the cylinder 41 via the pipe 59, the joint 58, and the air passage 45.

At this time, since the chamber 36 side is closed by the bullet 53, the air moves the cylinder 41 backward against the biasing force of the return spring 32. Therefore, the plurality of balls 40 that were compressing the O-ring 38 enter the annular groove 41A of the cylinder 41 as shown in FIG. 5(B) and FIG.
The inner diameter of the O-ring 38 expands and the bullet 53 is fired.

When the bullet 53 is fired, the air in the passage 45 also flows into the gun barrel 22.
As the water flows out through the air, the pressure will temporarily drop. Therefore, the cylinder 41 is moved forward by the biasing force of the return spring 32, returns to the state shown in FIG. 4, the O-ring 38 is compressed again, and the feeding of the bullet 53 is stopped. This increases the pressure in the passageway 34, causing the cylinder 41 to retreat and the bullet 53 to be fired again.

In this way, while the trigger 25 is being pulled, the states shown in FIGS. 4 and 8 are repeated in short order, and the bullet 53 is fired once.
It is fired almost continuously at a rate of 0 shots/SEC. When the finger is released from the trigger 25, the sear 68 pivots upward under the biasing force of the torsion spring 72, the latch portion 71 engages with the front end of the guide 27, and at the same time the valve 60 is closed and the air supply is cut off.

Further, the gas gun 20 of this embodiment can also switch the bullet 53 to a single shot, and in this case, the select button 74 may be slid to the E position.

This state is shown in an enlarged manner in FIGS. 9 and 10 (A), and the stopper 76
It is located below.

When the trigger 25 is pulled in this state, the trigger bridge 65 first turns counterclockwise in FIG. 10(B) about the support shaft 64, and the stepped portion 65B collides with the stopper 76. At the same time, the latch part 71 of the sear 68 separates from the front end of the guide 27, so the air pressure causes the guide 27 to separate from the front end of the guide 27.
moves backward and a bullet 53 is fired.

On the other hand, since the stepped portion 65B of the trigger bridge 65 is defined by the stopper 76, the trigger bridge 65 rotates clockwise around the support shaft 65 as shown in FIG. 67 is detached from the projection 69 of the sear 68. Therefore, the sear 68 pivots counterclockwise, that is, upward, by the biasing force of the torsion spring 72. As described above, when the first bullet 53 is fired, the cylinder 41 and guide 27 are once moved forward by the biasing force of the return spring 43. Therefore, the front end of the guide 27 moves to the left in FIG. 10(C) while contacting the upper surface of the latch part 71 and is locked again.

Therefore, when the select button 74 is set to the E position, the bullet 53 will not be fired unless the trigger 25 is returned one time at a time, resulting in a so-called single shot.

Note that in the above embodiments, air is used as the working gas, but other gases can also be used. Furthermore, the trigger mechanism and selector mechanism can be modified in various ways other than those shown in the drawings.

(Effects of the Invention) As described in detail above, the bullet firing device for a gas gun according to the present invention includes a chamber that is provided in communication between the gun barrel and the bullet supply side and has an annular groove inside the chamber, and an O-ring that fits into the chamber and has an inner diameter slightly smaller than the bullet; a plurality of holes penetrating the outer surface of the chamber from the annular groove; and a plurality of holes inserted into these holes to press the inner diameter of the O-ring to be smaller than the bullet. A ball, a cylinder having a gas passage communicating with the chamber and slidably fitting into the chamber, a groove formed on the inner surface of the cylinder into which the ball fits when the cylinder is retracted, and a bullet at the tip of the O-ring. a bullet supply means for press-contacting the cylinder to block the gas passage, and a gas supply means for supplying operating gas to the gas passage of the cylinder;
It consists of a valve installed in a part of the gas passage, a trigger means to open and close the valve, and a return means to return the retracted cylinder to its original position using gas pressure, so the gun barrel is fixed and accuracy is improved. In addition, even if the cylinder slides repeatedly, the presence of the ball prevents the O-ring from wearing out.

[Brief explanation of the drawing]

FIG. 1 is an internal side view of a gas gun to which the bullet firing device of the present invention is applied, FIG. 2 is an enlarged sectional view showing a conventional bullet firing device, and FIG. 3 is an exploded perspective view of FIG. Figure 4 is a longitudinal sectional view of the launcher, and Figure 5 (A). (B) is a cross-sectional view of the O-ring part, Figure 6 is a plan view showing the return state of the cylinder, Figure 7 is an enlarged cross-sectional view of the magazine seal mechanism, and Figure 8 is a longitudinal cross-sectional view showing the operating state of the bullet firing device. 9 is a plan view of the trigger and selector mechanism, and FIGS. 10 (A) and (B). (C) is an enlarged side view showing the operating state of the trigger and selector mechanism. 20... Gas gun, 22... Barrel, 25... Trigger, 27... Guide, 32... Return spring, 36... Chamber, 37... Annular groove, 38... O-ring , 39
... hole, 40 ... ball, 41 ... cylinder, 4
1A...Annular groove, 45...Air passage, 46...Magazine, 49...Seal, 52...Coil spring, 5
3... Bullet, 54... Step part of seal, 55... Taper part of seal, 60... Valve.

Claims (4)

[Claims] (1) A chamber that is provided in communication between the gun barrel and the bullet supply side and has an annular groove on the inside, an O-ring that fits into this annular groove and has an inner diameter slightly smaller than the bullet, and a chamber that extends from the annular groove to the outer surface of the chamber. A plurality of holes are provided through the O-ring, a ball is inserted into these holes and presses the inner diameter of the O-ring to be smaller than a bullet, and the gas passage communicates with the chamber, and is slidably fitted into the chamber. a groove formed on the inner surface of the cylinder into which the ball fits when the cylinder is retracted; a bullet supply means for causing a bullet at the tip to come into pressure contact with the O-ring to cut off the gas passage; A gas supply system comprising: a gas supply means for supplying gas for use; a valve provided in a part of the gas passage; a trigger means for opening and closing the valve; and a return means for returning the retracted cylinder to its original position using gas pressure. Gun bullet launcher. (2) The bullet firing device for a gas gun according to claim 1, wherein the bullet supply means is a coil spring inserted into a magazine tube. (3) The bullet firing device for a gas gun according to claim 1, wherein the return means for the cylinder is a guide connected to the cylinder and a coil spring that biases the guide forward. (4) The bullet firing device for a gas gun according to claim 1, wherein the gas supply means is an air compressor.