JPH0252999A - Shot firing device for gas rifle - Google Patents

Abstract

PURPOSE:To improve the hitting accuracy of a shot and permit the simplification of a structure by providing two sets of notches, formed on the inner surface of a slider for moving the outsides of a steel ball and an O-ring for cutting a successive projectile into the axial direction thereof and permitting the outward movement of the steel ball as well as the expansion of the O-ring. CONSTITUTION:A slider 5 is provided with a cylindrical configuration covering the peripheries of the rear part of a barrel 10, an O-ring 4 and a magazine and is permitted to slide axially. The slider 5 is provided with an annular notch 15 at the rear inside thereof while one part of a steel ball 3 is fitted into the notch 15. The slider 5 is also provided with the annular notch 16 for the expansion of the O-ring 4 on the fore inner surface thereof. An annular seal 17 for sealing is interposed between the slider 5 and the magazine 2. On the other hand, a flange 18 is formed on the rear side of the magazine 2 while a spring receiver 19 is engaged with the flange 18. A coil spring 6 is provided between the spring receiver 19 and the slider 5 and, the slider 5 is energized forward by the coil spring 6.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a bullet firing device for a gas gun that continuously fires a large number of bullets using compressed air or the like.

(Prior art) As a conventional bullet firing device of this type, the
A No. 8 gas gun is known, and this gas gun consists of an inner cylinder within the barrel, a strong spring, a magazine for supplying bullets, a bullet loading member, a weak spring, an O-ring between the loading member and the inner cylinder, It consists of a notch for O-ring expansion provided in the engine part, a rear gas passage, a valve, and a trigger.

Therefore, when the trigger is pulled, the valve opens and gas is introduced from the rear gas passage, and the bullet from the magazine comes into pressure contact with the O-ring, which increases the gas pressure.

Next, the loading member, one bullet, the O-ring, and the inner cylinder are moved together by gas pressure, and the next bullet from the magazine is cut by the loading member, and when the O-ring reaches the aforementioned notch, it expands and the bullet is removed. is fired. The bullets are fired repeatedly while the trigger is pulled, and when the trigger is released, the valve closes and each member returns to its original position under the action of a spring.

(Problems to be Solved by the Invention) However, in the conventional gas gun, firstly, it is necessary to form a bullet supply route and a gas supply route separately.
Furthermore, since a plurality of springs are provided, the structure is complicated. Second, the inner tube slides within the barrel during bullet firing, causing the barrel to wobble and reducing the accuracy of the bullet.

Third, since the O-ring constantly slides along the inner surface of the engine part, there is also the disadvantage that the O-ring wears out quickly.

The present invention has been made in view of the above circumstances, and its purpose is to provide a bullet firing device in gas that can increase the accuracy of bullets, simplify the structure, and prevent wear of the O-ring. There is a particular thing.

(Means for Solving the Problem) In order to achieve the above object, the bullet firing device of claim (1) includes a magazine that is coaxially connected to the rear of the gun barrel and serves as a magazine and a gas passage, and a hole in the front of the magazine. The inserted steel ball for cutting the next bullet, the elastic O-ring that is placed in front of the steel ball in the magazine and has an inner diameter slightly smaller than the bullet, and the outside of the steel ball and O-ring are moved in the axial direction. a slider, and two notches formed on the inner surface of the slider to allow outward movement of the steel ball and expansion of the O-ring;
It consists of a spring that biases the slider forward, a cylinder that covers the slider, a valve that supplies gas to the inside of the magazine and the front of the slider, and a trigger that opens the valve.

Moreover, in the bullet firing device of claim (2), in addition to the above configuration, a plurality of steel balls are radially interposed on the outside of the O-ring.

(Function) According to the structure of claim (1), when the trigger is first pulled, the valve is opened and gas is supplied to the inside of the magazine and the front of the slider. Therefore, the bullets in the magazine move forward due to gas pressure, and the leading bullet comes into pressure contact with the O-ring, increasing the gas pressure in the magazine and cylinder. When the gas pressure increases, the slider moves back against the spring pressure, and the notch in the steel ball is closed first, so the steel ball is pushed inward and the next bullet in the magazine is stopped, ie, cut. When the slider further retreats, the next notch fits into the O-ring, the O-ring expands, and the leading bullet is fired by gas pressure. Simultaneously with the firing of a bullet, the gas pressure within the magazine decreases, so the slider moves forward and returns due to the force of the spring, and when the steel ball enters the notch again, the next bullet advances and comes into pressure contact with the O-ring. The aforementioned series of steps continues as long as the trigger is pulled, thereby firing bullets in succession.

According to the structure of claim (2), the slider and the O-ring do not come into direct contact when the slider reciprocates, and the plurality of interposed steel balls come into contact with the inner surface of the slider, eliminating a worn portion of the O-ring.

(Example) FIGS. 1 and 2 show a gas gun 1 to which the bullet firing device of the present invention is applied, and the bullet firing device includes a magazine 2, a steel ball 3, an O-ring 4, a slider 5, , coil spring 6,
It is composed of a cylinder 7, a valve 8, and a trigger 9.

The magazine 9 is coaxially connected to the rear of the gun barrel 10,
A large number of bullets 11 are filled inside.

A cap 12 is screwed onto the rear end of the magazine 9.
The cap 12 can be opened to supply bullets 11. Further, an air tube 13 is connected to the rear lower surface of the magazine 9, so that the magazine 9 also serves as a magazine and an air passage.

A hole 14 is formed in the front upper and lower parts of the magazine 9, as shown enlarged in FIGS. 2 and 3 (A), and a steel ball 3 for cutting the next bullet is fitted into the hole 14. The six holes 14 are slightly narrowed toward the center to prevent the steel ball 3 from coming out of the holes 14.

An elastic O-ring 4 is interposed between the rear end of the gun barrel 10 and the front end of the magazine 2, and the O-ring 4 has an inner diameter slightly smaller than the outer diameter of the bullet 11.

The slider 5 has a cylindrical shape that covers the rear of the gun barrel 10, the O-ring 4, and the magazine 2, and is slidable in the axial direction. On the inside rear of the slider 5, there is a
As can be seen, a notch 15 is formed in an annular shape, and a part of the steel ball 3 enters into the notch 15 in the standby state shown in FIG. Further, on the front inner surface of the slider 5, a notch 16 for expanding the O-ring 4 is formed in an annular shape as shown in FIG. 4(A). Furthermore, between the slider 5 and the magazine 2,
An annular seal 17 for sealing is interposed.

On the other hand, a flange 18 is formed at the rear of the magazine 2 in FIG. 2, and a spring receiver 19 is fitted into the flange 18.

A coil spring 6 is installed between the spring receiver 19 and the slider 5, and the slider 5 is biased forward by the coil spring 6.

The outside of the slider 5 is covered with a cylinder 7, the front part of the cylinder 7 is screwed into the gun barrel 10, and the rear end of the cylinder 7 is screwed with a cap 20. Furthermore, annular seals 21 and 22 for sealing are interposed between the cylinder 7, the gun barrel 10, and the slider 5, respectively, and an air vent hole 23 is formed at the rear end of the cylinder 7.

Further, in this bullet firing device, an air passage is formed for guiding air in the magazine 2 into the cylinder 7, and the passage is
It consists of a hole 24 in the lower part of the magazine 2, a groove 15 in the slider 5, a hole 25 in the slider 5, and a gap 26 between the cylinder 7 and the slider 5.

On the other hand, an air tube 13 connected to the rear of the magazine 2
As shown in FIG. 1, the gun is connected to an external compressor or the like (not shown) through the stock 27. Air tube 1
A valve 8 for opening and closing an air passage is built in between the valves 3 and 3, and the rear end of a trigger 9 is in contact with the tip of a valve body 28 of the valve 8. A coil spring 29 is installed inside the valve 8 to press the valve body 28 to close the air passage, and when the trigger 9 is pulled, the valve body 28 is pushed and the air passage is opened.

Therefore, in the standby state shown in FIG. 2, the steel ball 3 can move outward by the distance of the notch 15, and the O-ring 4 is reduced by the slider 5.

Here, when the trigger 9 (Fig. 1) is pulled, the valve body 9 of the valve 8
is pressed, and high pressure air is supplied to the magazine 2 through the air tube 13. This air advances the bullet 11 in the magazine 2, and flows into the hole 24, notch 15, hole 25, and gap 26 of the magazine 2 through the gap between the bullets 11 (Fig. 2), and then the leading bullet. 11 comes into pressure contact with the OIJ ring 4, there is no outlet for air, so the pressure inside the magazine 2 increases, and the air that has entered the gap 26 causes the slider 5 to retreat against the force of the coil spring 6 (FIG. 5).

In the first stage of slider retreat, the notch 15 of the steel ball 3 retreats and closes, so the steel ball 3 moves toward the axis and projects into the magazine 2, as shown in FIG. 3(B). This will stop the next bullet from moving forward, that is, it will be cut.

When the slider 5 further retreats, the notch 16 at the tip of the slider aligns with the O-ring 4 as shown in FIG.
As shown in B), the leading bullet 11 is being pushed under high pressure.
is fired by expanding O-ring 4.

At the same time as firing, the high-pressure air in the magazine 2 also escapes through the barrel 10, so the slider 5 is pushed back by the coil spring 6. As the slider 5 moves forward, the notch 16 closes again, the O-ring 4 contracts, the notch 15 opens, the steel ball 3 becomes free, and the next bullet 11 advances to the O-ring 4.

The above steps are repeated while the trigger 9 is being pulled, thereby causing the bullets 11 to be fired continuously. Since magazine 2 serves as both a magazine and a gas passage, bullet 11
This eliminates the need for a separate feeding mechanism. Further, since the steel ball 3 and the notch 15 are used to cut off the next bullet, the structure is simpler and the reliability of the cut is increased compared to the conventional case using an inner cylinder and a coil spring. Furthermore, since the only movable part of the firing device is the slider 5 at the rear of the gun barrel, and the gun barrel 1o side does not move, the accuracy of the bullet 11 is improved.

7 to 10 show a second embodiment of the present invention, in which the same parts as in the previous embodiment are given the same numbers.

In this embodiment, as shown in FIG. 8(A), the O-ring 4 is fitted into the annular groove 30 of the magazine 2, six holes 31 are formed on the outside thereof, and steel balls 32 are inserted into the six holes 31. It is inserted. The outer surface of the steel ball 32 is in contact with the inner surface of the slider 5, and the inner surface of the steel ball 32 is in contact with the O-ring 4. On the other hand, the steel ball 3 that cuts the next bullet is larger by the amount that the steel ball 32 is placed outside the O-ring 4.

With this configuration, when the slider 5 retreats due to air pressure, the steel balls 3 first protrude into the magazine 2 and cut the next bullet 11 as shown in FIG.
As shown in Figure 0, the steel ball 32 is inserted into the notch 16 at the tip of the slider.
The O-ring 4 also becomes expandable. The steps from air flow and bullet 11 supply to firing are completely the same as in the previous embodiment.

Therefore, since the elastic O-ring 4 does not come into direct contact with the metallic slider 5, it hardly wears out even if the bullets are fired a considerable number of times. Of course, this bullet firing device also provides the same effects as in the previous embodiment (11).

(Effects of the Invention) As detailed above, according to the bullet firing device of claim (1), since there is no movable part on the gun barrel side, the accuracy of bullets is improved, and the magazine functions as both a magazine and a gas passage. This has the effect of simplifying the structure. Furthermore, since the bullet is cut using the steel ball and the notch, the biasing force does not weaken as with conventional springs.

Furthermore, according to the bullet firing device of claim (2), in addition to the above-mentioned effects, wear of the O-ring due to reciprocating movement of the slider can be prevented.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional side view of a gas gun incorporating the bullet firing device of the present invention, Fig. 2 is a diagram of the bullet in standby state, Fig. 3 (A),
(B) and FIGS. 4(A) and (B) are enlarged sectional views taken along lines ■-■ and IV-IV in FIG. Figure 7 shows the second bullet launcher.
The standby state diagram showing the embodiment, FIGS. 8(A) and 8(B) are the seventh
The enlarged cross-sectional view taken along the line 1--1 in FIG. 9 and FIG. 10 are diagrams of the operating state. 1... Gas gun, 2... Magazine, 3... Steel ball, 4
... O ring, 5 ... Slider, 6 ... Coil spring, 7 ... Cylinder, 8 ... Valve, 9 ... Trigger, 10 ... Gun barrel, 11 ... Bullet, 15 .16...
-Slider notch, 32...steel ball.

Claims (2)

[Claims] (1) A magazine that is coaxially connected to the rear of the gun barrel and serves as a magazine and a gas passage, a steel ball for cutting the next bullet inserted into a hole at the front of the magazine, and a steel ball that is placed in front of the steel ball of the magazine. an elastic O-ring having an inner diameter slightly smaller than the bullet; a slider that moves in the axial direction on the outside of the steel ball and the O-ring; and a slider that is formed on the inner surface of the slider to allow the steel ball to move outward and the O-ring to expand. a spring that biases the slider forward, a cylinder that covers the slider, a valve that supplies gas to the inside of the magazine and the front of the slider, and a trigger that opens the valve.
Gas gun bullet launcher consisting of. (2) The bullet firing device for a gas gun according to claim (1), wherein a plurality of steel balls are radially interposed on the outside of the O-ring.