JPH11287596A - Valve apparatus in blow back gas gun - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive to improve hit accuracy by holding a loaded bullet by required minimum force. SOLUTION: The valve apparatus includes closing means 33 wherein a movable member 14 has a built-in movable valve 32 shifting together with a piston 15 able to retreat by gas flowing in a pressure chamber 12 and introducing the gas from the pressure chamber 12 to a gas flow route 31 communicating with a bullet-loading chamber 27 in which a bullet is loaded, and at the beginning of introduction of the gas to the pressure chamber 12, the gas flow route 31 communicating with the bullet-loading chamber 27 is closed, and the bullet is ready to be fired by opening the gas flow route 31 communicating with the bullet-loading chamber 27 in a process of shifting of the movable valve 32 under being energized together with the piston 15 sliding by the gas pressure, and then the gas flow route 31 is closed again.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for ejecting a gas into an external passage by a firing operation, introducing the gas into a pressure chamber located downstream, and connecting a movable member and a piston for firing a bullet and loading a next round. The present invention relates to a valve device for a blow-back type air gun that performs an operation of a slider including the same.

[0002]

2. Description of the Related Art Guns of the type referred to as air guns or gas guns use compressed air or other compressed gas and can fire a spherical bullet at that pressure. These guns include a model gun type modeled after a real gun (hereinafter, referred to as a real gun), and a model simulating the operation of a breech pad that blows back like a real gun.

[0003] The invention of Japanese Patent No. 2561429 also enables such a blow-back operation. But,
In the toy gun of the present invention, the gas passage control unit is indispensable for preparing the supply of bullets from one end of the magazine to the loading chamber. The gas passage control unit opens the valve member when the rod tip hits a bullet set in the bullet loaded portion at the base end of the barrel. Since a spring for opening the valve member is acting on this rod, a spring force is always applied to the bullet.

Accordingly, in the above invention, the rod plays the role of a sensor for detecting whether a bullet is loaded or not loaded,
The force holding the bullet must also withstand the above-mentioned spring force.
Otherwise, there is a risk that the bullet will fall out due to being pushed by the rod. In addition, since the force holding the bullet has an effect of reducing the firing pressure, the momentum and the like of the bullet to be fired decrease or fluctuate, and this has a nonnegligible effect on the accuracy of the hit.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned point, and an object of the present invention is to hold a loaded bullet without using a sensor required in the conventional invention. The minimum required force. Another object of the present invention is to ensure that the hit accuracy is kept high.

[0006]

According to the present invention, there is provided a blow-back type gas gun in which a bullet is loaded from a pressure chamber by moving together with a piston which can be retracted by flowing gas into the pressure chamber. A movable valve for guiding the gas to the gas passage leading to the loaded chamber is built in the movable member,
In the early stage of gas introduction into the pressure chamber, the gas flow path leading to the loading chamber is closed, and the gas flow path leading to the loading chamber is once opened in the process in which the movable valve moves under bias along with the piston sliding by gas pressure. And a valve device having an opening / closing means for closing the gas flow path again thereafter.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A valve device 30 according to the present invention is applied to a blowback type gas gun 10. The blowback type gas gun 10 causes a gas to be ejected from a pressure source such as the pressure accumulating unit 22 to the external passage 11 by a firing operation, introduces the gas into a pressure chamber 12 located downstream, and fires a bullet 13 and a next bullet. Movable member 14 and piston 15 for loading
Is performed.

In the case of a gun toy, an operation member 17 called a trigger is generally used for a firing operation. Operation member 1
Reference numeral 7 denotes a member that plays a role as a switch for controlling opening and closing of gas ejection. In the case of a model gun type toy, it is necessary to perform a movement imitating the operation of an actual gun. For this reason, the striking member 18 corresponding to the hammer is interlocked by the trigger operation, and the intermediate member 19 and the normally closed on-off valve 20 are pushed by the operation of striking the hammer or the like by the rotation of the striking member 18, and a series of operations for opening the valve port 21. Is performed.

Thus, the gas can be discharged from the accumulator 22 filled with the compressed air or the gas other than the air into the external passage 11 through the on-off valve 20. Reference numeral 23 denotes a lever that connects the operating member 17 and the shear 24, and locks the striking member 18 against the elasticity of the spring means 25. Therefore, when the shear 24 is pulled by the trigger operation and the latching of the striking member 18 is released, the striking member 18 performs a striking operation. This series of operations is one example, and it is essential that the gas be ejected to the external passage 11 by the firing operation and the gas be introduced into the pressure chamber 12 located downstream.

The storage section 26 of the bullet 13 and its supply path also take the form of an actual gun. The receiving part 26 is located at the grip part, and the bullet 13 is loaded in the loading chamber 2 in which it is to be loaded.
And a biasing means 28 such as a spring for pushing in the direction 7. The bullet chamber 27 is located at the rear end of the barrel 29, the bullet 13 is loaded into the bullet chamber 27 from behind, and when the compressed gas is injected from the pressure chamber 12, the bullet 13 is fired. Done.

A valve device 30 according to the present invention is provided for firing the bullet 13 and sliding the slider 16 by the pressure of the gas introduced into the pressure chamber 12.

The valve device 30 moves together with the piston 15 which can be retracted by the inflow of gas into the pressure chamber 12, and the bullet chamber 2 in which the bullet 13 is loaded from the pressure chamber 12.
Movable valve 32 for guiding gas to gas passage 31 leading to 7
The above-mentioned movable member 14 having a built-in is provided. In the early stage of gas introduction into the pressure chamber 12, the gas passage 31 leading to the loading chamber 27 is closed, and the piston 15 activated by the gas pressure is closed.
In addition, in the process in which the movable valve 32 moves under the bias, the gas passage 31 leading to the loading chamber 27 is once opened to enable the bullet 13 to be fired, and thereafter, there is provided opening / closing means 33 for closing the gas passage 31 again.

The piston 15 has a cylinder 34 at a rear portion of the movable member 14 and has a structure in which the piston 15 can retreat and move forward. A sealing means is provided for increasing airtightness against pressure gas applied from the side facing the pressure chamber 12. 35. The front portion of the movable member 14 forms a gas passage 31, and the pressure chamber 12 is located therebetween, that is, between the cylinder 34 and the gas passage 31. The movable valve 32 is set so as to move following the retreating movement of the piston 15 without disturbing its movement even when the side surface 36 receiving the compressed gas receives the pressure of the compressed gas in the pressure chamber 12.

The pressure of the compressed gas that has flowed into the pressure chamber 12 is controlled by the opening / closing means 33 to perform two functions, bullet firing and loading of the next round. The opening / closing means 33 is closed at the beginning of the introduction of gas into the pressure chamber 12, and then opened once in the process when the piston 15 moves backward, and is closed again when the piston 15 moves backward, and is constituted by the overlap of the two ports 37 and 38. Is done. For example, one port 37 is provided on the side of the movable member 14 that moves relatively, and the other port 38 is provided on the side of the movable valve 32. The action of urging the movable valve 32 in the piston retreating direction can be obtained by the spring means 39.

The loading of the bullet 13 into the loading chamber 27 is performed by the action of the movable member 14 moving backward and forward. Movable member 1
4, the presser foot 4 closing the upper end of the bullet accommodating section 26
0, that is, a part of the movable member 14 moves to
6. Open the upper end of 6 and push one bullet out of the movable member 1
At the time of forward movement of the movable member 4, the movable member tip portion 41 forming the gas flow path 31 is pushed into the loading chamber 27.

The operation of returning the slidable movable member 14 to the original home position can be obtained by the spring means 42.
The spring means 42 has one end supported by a slide member 43 constituting a part of the slider 16 and the other end supported by the movable member 14. Reference numerals 14a and 43a denote supporting portions of the spring means 42.

The slider 16 is known in the field of firearms as being slidable in the front-rear direction with respect to the gun body, and the present invention also adopts a structure simulating the movement. 44 is a spring means for returning the slider 16 and 45 is a piston 1
5 shows a coupling member between the slider 5 and the slider 16. The connecting member 45 can also serve as a member for operating the safety device 45c as shown in each of the drawings, in particular, FIG. 7, and levers 45a and 45b for that purpose are arranged on the left and right sides of the slider 16. Reference numeral 45d denotes a member for connecting the slide member 43 and the piston 15.

In the case of the present invention having the above-described structure, the movable member 14 is positioned with the distal end portion 41 in contact with the receiving portion on the rear end side of the barrel, so that no external force is applied to the bullet 13 until firing. Of course, the holding force is held in the loading chamber 27, but this holding force may be sufficient and sufficient to support the weight of the bullet itself.

In such a configuration, the present device operates as follows. FIG. 1 shows a state in which the bullet 13 is loaded into the bullet chamber 27, the movable member 14 is disposed immediately after the bullet 13, the striking member 18 is raised, and the firing operation is stopped by the shear 24. In this state, the piston 15 is in the forward position, the pressure receiving side surface 36 of the movable valve 32 is in contact with the distal end thereof under the bias of the spring, and the opening / closing means 33 is closed.

When the striking member 18 is actuated by a trigger operation, the valve port 21 is opened, and the gas in the pressure accumulating section 22 is released.
And the striking member 18 maintains this state. See FIG. The gas flows into the pressure chamber 12 from the opening 46 of the movable member 14, pressurizes the piston 15 because the opening / closing means 33 is closed, the piston 15 starts to retreat, and the movable valve 32 is pressed by the spring in the same direction. Start moving to.
Although the gas pressure also acts on the movable valve 32, the shape is less affected by the pressure, and the spring means 39 opposes the gas pressure, so that the movable valve 32 stably follows the retraction of the piston 15.

When the piston 15 moves backward, the opening / closing means 33 is opened.
When the ports 37, 38 overlap, gas flows into the gas flow path 31 leading to the loading chamber 27, and the pressure causes
The bullet 13 held in the loading chamber 27 is fired at once. This is the state shown in FIG. During this time, the gas pressure is continuously applied to the piston 15, so that the piston 15 keeps moving backward.

As a result, the opening / closing means 33 is closed again, and the gas pressure concentrates on the piston 15 which continues to move backward. The piston 15 continues its retreating movement, during which the striking member 18 begins to be raised by the retracting piston 15. See FIG. Note that the movable valve 32 is placed in the closed position under the action of the spring means 39.

When the movable member 14 further retreats together with the slider 16 and the striking member 18 comes to a stage where it is locked by the shear 24, the on-off valve 20 returns, the valve port 21 closes, and the gas injection stops (FIG. 9). 5). With the retreat of the slider 16,
The upper part of the gun body is exposed. At this time, in the present invention, the movable member 14 retreats together with the piston 15 and is hidden in the slider 16 and cannot be seen from the outside.

The bullet receiving section 2 is moved by the retracted slider 16.
6, the presser foot 40 is removed, the bullet 13 is pushed upward by one shot, and the piston 15 which has been affected by the gas pressure is returned to the original position by the spring means 44 together with the slider 16 and the like, and stopped by the stopper 47. As a result, the single bullet is pushed into the loading chamber 27 by the part 40a on the distal end side of the movable member 14 as shown by a dashed line, and the loading is completed (see FIG. 1).

[0025]

Since the present invention is constructed and operates as described above, the gas passage leading to the loading chamber is initially closed by the opening / closing means and no pressure is applied, and the bullet is held in the loading chamber. Therefore, there is no need for a member such as a conventional rod-shaped sensor, so that the force required for holding the loaded bullet can be minimized. As a result, the pressure of the gas applied to the pressure chamber is not wasted and is concentrated on the firing of the bullet, so that when the used gas pressure is the same, a higher gas pressure can be used for firing the bullet. It is characterized by increased momentum and high accuracy.

[Brief description of the drawings]

FIG. 1 is a sectional view of a valve device in a blowback gas gun according to an embodiment of the present invention in a firing preparation state.

FIG. 2 is a sectional view showing a state in which a gas flow path is closed immediately after a firing operation.

FIG. 3 is a sectional view showing a state in which a gas flow path is opened and a bullet is fired.

FIG. 4 is a cross-sectional view showing a stage in which a piston and a slider are being retracted.

FIG. 5 is a cross-sectional view of a bullet supply process showing a retreat limit of a piston and a slider.

FIG. 6 is a side view showing the internal structure.

FIG. 7 is a perspective view showing a related structure of a blowback type gas gun.

FIG. 8A is a side view showing the entire structure of the above. (B) The side view which shows the state in which the slider was retracted.

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[Procedure amendment]

[Submission date] May 1, 1998

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

As a result, the opening / closing means 33 is closed again, and the gas pressure concentrates on the piston 15 which continues to move backward. The piston 15 continues its retreating movement, during which the striking member 18 begins to be raised by the retracting piston 15. See FIG. The movable valve 32 retreats under the action of the spring means 39 , hits the stopper 47 and is in the closed position.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0024

[Correction method] Change

[Correction contents]

The bullet receiving section 2 is moved by the retracted slider 16.
6, the presser foot 40 is removed, the bullet 13 is pushed up by one shot, and the piston 15 which has no influence of the gas pressure is returned to the original position by the spring means 44 together with the slider 16 and the like .
To move . Movable above 1 bullet in this process member 1
4 is pushed into the loading chamber 27 by a part 40a on the tip side as shown by a chain line, and the loading is completed (see FIG. 1). Also
The movable valve 32 is also pushed back by the piston 15 and returns,
Return to the original position specified by 47.

Claims (3)

[Claims] 1. A firing operation injects gas into an external passage, introduces gas into a pressure chamber located downstream, and operates a slider including a movable member and a piston for firing a bullet and loading a next round. In blowback type gas gun,
A movable valve is incorporated in the movable member for guiding the gas to the gas passage leading from the pressure chamber to the loading chamber in which the bullet is loaded by moving with the piston which can be retracted by the inflow of the gas into the pressure chamber. In the initial stage of gas introduction into the ammunition chamber, the gas flow path leading to the loading chamber is closed, and the gas flow path leading to the loading chamber is once opened in the process of moving the movable valve together with the piston slid by the gas pressure under a bias so that the bullet is opened. A valve device for a blow-back type gas gun, comprising: an opening / closing means for setting a state in which the gas can be fired and then closing the gas flow path again. 2. The piston has a structure in which a rear part of the movable member is a cylinder and is capable of moving backward and forward inside the cylinder. The piston is provided with sealing means for increasing airtightness against pressure gas applied from the side facing the pressure chamber. 2. The valve device according to claim 1, wherein a front portion of the movable member forms a gas flow path, and a pressure chamber is located between the cylinder and the gas flow path. 3. The opening / closing means is constituted by an overlap of two ports which are closed in the initial stage of gas introduction into the pressure chamber, then opened once in the process when the piston moves backward, and closed again when further moved backward. The valve device according to claim 1, wherein the blow-back gas gun is provided.