JP2556510Y2 - Gas gun bullet launcher - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bullet firing device for a gas gun which fires a bullet with air or the like having a predetermined pressure.

[0002]

2. Description of the Related Art Heretofore, a bullet launcher of this type has already been proposed by the applicant (Japanese Patent Application No. 3-77775).

In this bullet launcher, a coaxial cylinder which also serves as a magazine and a gas passage is coaxially connected to the rear of a barrel, and a moving unit is moved forward along the coaxial cylinder by a driving unit interlocked with a trigger.
By retracting, the steel ball for stopping the projectile and the steel ball for cutting the next projectile are made to protrude and retract in the coaxial cylinder, so that the bullet to which the gas pressure is constantly applied is sequentially fired.

[0004]

However, since the driving section is composed of a motor, a speed reducer, a crank and the like, there is a drawback that the structure is complicated and the cost is high. In addition, since the drive unit does not stop until the trigger is returned, there is a disadvantage that wasteful gas is consumed after the bullet is fired.

The present invention has been made in view of the above-mentioned problems, and has as its object to simplify the structure and reduce the cost and to reduce the gas consumption as much as possible. An object of the present invention is to provide a bullet firing device for a gun.

[0006]

According to the present invention, in order to achieve the above object, a bullet launching device according to claim 1 is formed coaxially behind a barrel and serves as a magazine and a gas passage. Of the pair of through holes radially penetrating the peripheral wall of the coaxial cylinder and being provided at a predetermined distance in the axial direction of the coaxial cylinder, it is loosely fitted in the front through hole and is slightly larger than the thickness of the peripheral wall. A steel ball for stopping a projectile having a diameter, a steel ball for cutting a next bullet having the same diameter as the steel ball, which is loosely fitted in a rear through hole of the pair of through holes, and A small inner diameter portion which is slidably fitted to the outer periphery in the axial direction and has an inner diameter substantially equal to the outer diameter of the coaxial cylinder is formed at the axially intermediate portion over a length longer than the distance between the steel balls. In addition, a pair of large inner diameter portions having an inner diameter slightly larger than the outer diameter of the coaxial cylinder is provided in front of the small diameter portion. A moving body obtained by continuously formed,
A trigger for moving the moving body rearward in the axial direction of the coaxial cylinder, a switch that operates in conjunction with the trigger, biasing means for urging the moving body forward in the axial direction of the coaxial cylinder, A gas supply source for supplying a gas at a predetermined pressure from a gas source, a valve for opening and closing between the gas supply source and the coaxial cylinder, a sensor for detecting that a bullet has been fired, and opening the valve when the switch is operated And control means for closing the valve when the sensor detects bullet firing and opening the valve for a predetermined time when the operation of the switch is released.

[0007] In the second aspect, three or more pairs of steel balls are provided at an interval in the circumferential direction of the coaxial cylinder.

[0008]

According to the first aspect, in the initial state, the small inner diameter portion of the moving body is on the steel ball for stopping the projectile of the coaxial cylinder, and the large inner diameter portion is also on the steel ball for cutting the next bullet. Located in. In this state, a part of the steel ball for stopping the projectile protrudes into the coaxial cylinder to prevent passage of the bullet, but the steel ball for cutting the next bullet retreats from the coaxial cylinder into the gap formed by the large inner diameter portion. So that bullets are allowed to pass.

Next, when the trigger is pulled to move the movable body rearward in the axial direction of the coaxial cylinder, first, a steel ball for cutting the next round is pressed by the small inner diameter portion of the movable body, and a part of the steel ball is cut off. It protrudes inward and becomes ready to block the next shot of the target bullet. At this time, the switch is operated in conjunction with the trigger, the valve is opened, and gas of a predetermined pressure is sent from the gas supply source into the coaxial cylinder. Next, when the large-diameter portion on the front side of the moving body reaches the steel ball for stopping the projectile, a part of the steel ball for stopping the projectile is retracted from the coaxial cylinder into the gap defined by the large-diameter portion. To do so, bullets that have been prevented from firing by the steel ball are fired through the barrel. At this time, if the firing of the bullet is detected by the sensor, the valve closes and the gas supply is cut off.

Thereafter, when the trigger is returned, the moving body is moved forward in the axial direction of the coaxial cylinder by the urging means, and the steel ball for stopping the projectile is pressed again by the small inner diameter portion of the moving body to enter the coaxial cylinder. When the rearward large-diameter portion of the moving body reaches the position where the projecting projectile stops the passage of the bullet, and subsequently the steel ball for cutting the next bullet reaches the large-diameter portion on the rear side of the moving body, a part of the steel ball for cutting the next bullet is reduced to the large-diameter portion. Evacuates from the coaxial cylinder into the gap. At this time, when the operation of the switch is released by returning the trigger, the valve is opened for a predetermined time and a predetermined amount of gas is supplied into the coaxial cylinder. As a result, the bullet, whose movement has been prevented by the steel ball for cutting the next bullet, moves forward, is locked to the steel ball for stopping the shot, and prepares for the next firing.

Therefore, the moving body is driven by the trigger and the urging means, and does not require another complicated structure. Also,
As soon as the bullet fires, the gas supply is cut off.

According to the second aspect, since the bullet is locked by three or more steel balls, the stop and release of the stop of the bullet can be further ensured.

[0013]

1 to 5 show a gas gun 1 to which a bullet firing device according to the present invention is applied. The outer shell of the gas gun 1 is formed by a case body 2 representing a handgun.

In FIG. 1, a coaxial tube 10 is coaxially connected to the rear of the barrel 3 and has the same inner diameter and outer diameter as the barrel 3, and also serves as a magazine and a gas passage. A pair of through-holes 11a, 11 which penetrate the peripheral wall in the radial direction and are spaced at predetermined intervals in the axial direction are formed in the peripheral wall of the coaxial cylinder 10.
b is provided. 2 to 4, the through holes 11a and 11b are shown side by side for easy understanding of the operation. However, actually, the through holes 11a and 11b are displaced from each other in the circumferential direction of the coaxial cylinder 10 and are further displaced in the circumferential direction. Three are provided at intervals. Behind the coaxial tube 10, the coaxial tube 1
A gas supply source (not shown) is connected via a connection pipe 12 having the same inner diameter as 0, and air at a predetermined pressure is supplied from the gas supply source into the coaxial cylinder 10.
The connecting pipe 12 is provided with an electromagnetic valve 13 for opening and closing between the coaxial cylinder 10 and the gas supply source.
Is a bullet A sent with the gas supply when it is opened
Is possible.

Reference numerals 20a and 20b denote a pair of steel balls for stopping the projectile and for cutting the next projectile. Each steel ball 20a, 20b has a diameter slightly larger than the thickness of the peripheral wall of the coaxial cylinder 10,
A steel ball 20a for stopping the next shot is inserted into a through hole 11a located on the axially forward side of the coaxial cylinder 10 in order to stop the firing bullet.
0b is a through hole 11 located on the axial rear side of the coaxial cylinder 10
b. In addition, each through hole 11
a, 11b, the inner surface of the coaxial cylinder 10
The opening area is narrowed down so that only a part of a and 20b protrudes.

Reference numeral 30 denotes a cylindrical movable body, which is fitted to the outer periphery of the coaxial cylinder 10 so as to be slidable in the axial direction. The moving body 30 includes a small inner diameter portion 31 having an inner diameter substantially equal to the outer diameter of the coaxial cylinder 10 and a pair of large inner diameter portions 32 having an inner diameter slightly larger than the outer diameter of the coaxial cylinder 10. The small inner diameter portion 31 is formed over a length larger than the distance between the steel balls 20a and 20b, and each large inner diameter portion 32 is formed continuously in front of and behind the small inner diameter portion 31. In addition, moving body 3
A coil-shaped spring 33 wound around the outer periphery of the coaxial cylinder 10 is provided behind the zero, and the moving body 30 is urged forward by the spring 33 in the axial direction of the coaxial cylinder 10. Reference numeral 34 denotes a locking plate for locking one end of the spring 33, which is attached to the outer periphery of the coaxial cylinder 10.

Reference numeral 40 denotes a trigger disposed below the coaxial cylinder 10, which is provided so as to be slidable along the axial direction of the coaxial cylinder 10. The trigger 40 includes a finger hook 41 and
A locking portion 42 for locking the front end of the moving body 30, and the moving body 30 is moved rearward in the axial direction of the coaxial cylinder 10 by pulling the finger hook 41. Also, trigger 4
A contact portion with a switch 50 described later is provided on a lower end surface of the first contact portion 43, and the contact portion is provided at a first contact portion 43 formed behind the finger hook portion 41 and at a rear portion of the first contact portion 43. And a second contact portion 44 formed one step higher.

Reference numeral 50 denotes a microswitch (hereinafter, referred to as a switch) disposed below the trigger 40, which is connected to a control circuit 70 described later. Operating rod 5 of switch 50
Reference numeral 1 denotes a state in which each of the contact portions 43 and 44 of the trigger 40 is in contact with each other, and when the trigger 40 is located forward, the operating rod 51 of the switch 50 comes into contact with the second contact portion 44 and rises by its own urging force. (OFF), and when the trigger 40 is retracted, the contact position of the operating rod 51 moves to the first contact portion 43 and is pressed down (ON).

Reference numeral 60 denotes a sensor for detecting the firing of a bullet, which is provided near the muzzle of the barrel 3. The sensor 60 comprises an infrared sensor or the like,
1 and a light receiving section 62.

Reference numeral 70 denotes a control circuit for controlling the operation of the valve 13, and FIG. 4 shows an embodiment thereof. This control circuit 70
Is composed of a valve driving unit 71 including a photocoupler and a transistor, a valve driving power supply 72 connected to the valve driving unit 71, a timer 73 including a one-shot multivibrator, a D-type flip-flop 74, and the like. I have. The switch 50 is connected to the clock input terminal CLK of the flip-flop 74, the sensor 60 is connected to the reset terminal R, the valve driving unit 71 is connected to the output terminal Q, and the input terminal D is always pulled up to a high level. . One end of the timer 73 is connected between the switch 50 and the clock input terminal CLK, and the other end is connected between the valve driving unit 71 and the output terminal Q.

In this control circuit 70, the switch 5
The input signal from 0 to the flip-flop 74 is the switch 5
When 0 is OFF, the level is low, and when ON, the level is high. Also, the input signal from the sensor 60 to the flip-flop 74 is always at a low level, and only when the light between the light emitting unit 61 and the light receiving unit 62 of the sensor 60 is shielded from light, does it go low.
It switches to the level. On the other hand, the output signal from the flip-flop 74 to the valve driving unit 71 is always at a low level, and when the input signal from the switch 50 is switched to a high level, the output signal is switched to a high level and the output from the sensor 60 is When the input signal goes low, the output signal is reset to low. Further, the output signal from the timer 73 to the valve driving unit 71 is always at a low level, and when the input signal from the switch 50 switches from a high level to a low level, the output signal is kept for a predetermined time (for example, 0.5 Second) for a high level. In the valve driving section 71, the power of the power supply 72 is supplied to the valve 13 only when the input signal is at a high level.

Here, the operation of the bullet firing device of the present embodiment will be described.

First, before the bullet A is fired, as shown in FIG.
Is pressed by the small inner diameter portion 31 and protrudes into the coaxial cylinder 10 to prevent the bullet A from passing therethrough. The large-diameter portion 3 on the rear side of the moving body 30 is placed on the steel ball 20b for cutting the next round.
2 is located, and a part of the steel ball 20b for cutting the next round is retracted from the inside of the coaxial cylinder 10 into the gap defined by the large inner diameter portion 32b. At this time, in the control circuit 70, the output signal of the flip-flop 74
Is also low level, the signal to the valve drive unit 71 is low level. That is, the valve 13
Is not supplied with power, and the valve 13 is closed.

Next, when the trigger 40 is pulled, the moving body 30 moves to the rear of the coaxial tube 10 (to the right in FIG. 3) as shown in FIG. As a result, the steel ball 20 for the next shot cut
b is pressed by the small inner diameter portion 32a of the moving body 30 and a part thereof projects into the coaxial cylinder 10, and the bullet A to be fired is fired.
It will be ready to prevent the next shot from being fired. At this time, the operating rod 51 of the switch 50 is pushed down by the first contact portion 43 of the trigger 40 to be turned ON, and in the control circuit 70, the input signal from the switch 50 to the flip-flop 74 is switched to a high level. Thereby, the flip-flop 74
Is switched from low level to high level,
The signal to the valve driving unit 71 becomes high level, power is supplied to the valve 13, and the valve 13 is opened. Therefore, although gas is supplied into the coaxial tube 10, the bullet A is not fired yet.

Subsequently, the large-diameter portion 3 on the front side of the moving body 30
When the ball 2 reaches above the steel ball 20a for stopping the projectile, FIG.
Since a part of the steel ball 20a for stopping the projectile is retracted from the inside of the coaxial cylinder 10 into the gap formed by the large inner diameter portion 32 as shown in FIG.
The bullet A, which has been prevented from being fired by the steel ball 20a, is fired through the barrel 3. When the shot A is detected by the sensor 60, the input signal from the sensor 60 to the flip-flop 74 is momentarily switched to the low level in the control circuit 70. As a result, the output signal of the flip-flop 74 is reset from the high level to the low level, and the output signal of the timer 73 at this time is also at the low level, so that the signal to the valve driving unit 71 is switched to the low level.
That is, power is not supplied to the valve 13 and the valve 1
3 closes.

Thereafter, when the trigger 40 is returned, the moving body 30 is moved forward of the coaxial cylinder 10 by the spring 33 as shown in FIG. Thereby, the steel ball 2 for stopping the firing bullet
0 a is again pressed by the small inner diameter portion 31 of the moving body 30 and protrudes into the coaxial cylinder 10, so that the bullet A is prevented from passing. Next, when the large-diameter portion 32 on the rear side of the moving body 30 reaches the steel ball 20b for cutting the next bullet, a part of the steel ball 20b for cutting the next bullet is coaxially inserted into the gap formed by the large-diameter portion 32b. Retreat from inside the cylinder 10. At this time, the contact position of the operating rod 51 of the switch 50 moves to the second contact portion 44 of the trigger 40, the switch 50 is turned off, and the signal from the switch 50 to the timer 73 is switched to the low level. As a result, the output signal of the timer 73 is switched from low level to high level for a fixed time, and the valve 13 is opened for a fixed time. Therefore, the bullet A, which has been prevented from moving by the steel ball 20b for cutting the next bullet, advances due to the pressure of the air, and is locked to the steel ball 20a for stopping the shot to prepare for the next firing.

As described above, according to the bullet firing apparatus of the present embodiment, the driving means of the moving body 30 is constituted by the trigger 40 and the spring 33, so that the structure becomes simple and the design and manufacturing can be easily performed, and the cost can be reduced. Can be greatly reduced. In addition, a sensor 60 is provided near the muzzle, and the valve 13 is closed immediately when a bullet is fired by the sensor 60, so that gas consumption can be reduced as much as possible, which is economical. There are advantages too.

In the above embodiment, the barrel 3, the coaxial tube 10,
Although the connecting pipes 50 are separately formed and connected, they may be formed as a series of members.

[0029]

As described above, according to the first aspect, the structure is simplified, design and manufacture can be easily performed, and the cost can be greatly reduced. In addition, there is also an advantage that the gas consumption can be reduced as much as possible and the gas is economical.

According to the second aspect of the present invention, since the stop and release of the stop of the bullet are further ensured, the occurrence of a failure can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a bullet firing device according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a main part showing an operation of the bullet firing device.

FIG. 3 is an enlarged sectional view of a main part showing an operation of the bullet firing device.

FIG. 4 is an enlarged sectional view showing a main part of the operation of the bullet firing device.

FIG. 5 is a schematic configuration diagram of a control circuit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Gas gun, 3 ... Barrel, 10 ... Coaxial cylinder, 11a, 11b
... through-hole, 13 ... valve, 20a, 20b ... steel ball, 30
.., Moving body, 31 ... small inner diameter part, 32 ... large inner diameter part, 33 ... spring, 40 ... trigger, 50 ... switch, 60 ... sensor, 70 ... control circuit, A ... bullet.

Claims (2)

(57) [Scope of request for utility model registration] 1. A coaxial cylinder which is formed coaxially behind a barrel and also serves as a magazine and a gas passage, and is provided at a predetermined distance in the axial direction of the coaxial cylinder penetrating radially through a peripheral wall of the coaxial cylinder. A steel ball for stopping a projectile that has a diameter slightly larger than the thickness of the peripheral wall and is loosely fitted into a front through-hole of the pair of through-holes, and a rear-side through-hole of the pair of through-holes. A steel ball for cutting the next round having the same diameter as the steel ball, and slidably fitted in the outer periphery of the coaxial cylinder in the axial direction, and having an inner diameter substantially equal to the outer diameter of the coaxial cylinder. A small-diameter portion is formed at an intermediate portion in the axial direction over a length greater than the distance between the steel balls, and a pair of large-diameter portions having an inner diameter slightly larger than the outer diameter of the coaxial cylinder is formed before and after the small-diameter portion. A moving body formed continuously with the moving body, and moving the moving body rearward in the axial direction of the coaxial cylinder. A rigger, a switch that operates in conjunction with the trigger, a biasing unit that biases the moving body axially forward of the coaxial cylinder, a gas supply source that supplies gas of a predetermined pressure from the rear of the coaxial cylinder, A valve for opening and closing between the gas supply source and the coaxial cylinder, a sensor for detecting that a bullet has been fired, and opening the valve when the switch is actuated;
Control means for closing the valve when the sensor detects the firing of the bullet and opening the valve for a predetermined time when the operation of the switch is released. 2. The bullet firing device for a gas gun according to claim 1, wherein three or more pairs of front and rear steel balls are provided at intervals in the circumferential direction of the coaxial cylinder.