JP5433800B1 - Blowback gas gun - Google Patents

Abstract

An object of the present invention is to provide a blowback gas gun for a game that eliminates gas leakage from an air switch to improve the use efficiency of compressed gas and prevents the malicious improvement of the air switch.
A cylindrical switch case 5 is fixed inside a front side of a cylinder 3 provided above a discharge passage 2 for compressed gas and along an inner periphery communicating with the chamber. A switch 7 having a spherical surface that is in close contact with the circular plug port 6 formed on the rear side of the switch case is provided, and a switch spring 8 that urges the switch rearward is provided in the internal passage of the switch case. An opening 10 is formed in the upper portion of the switch case on the discharge passage side, and the lower portion of the opening portion has a closed portion 11 for blocking the inflow of compressed gas from the discharge passage side, and flows into the cylinder through the discharge passage. The compressed gas that flows around the outside of the switch case flows from the upper opening to the plug opening.
[Selection] Figure 2

Description

  The present invention relates to a blowback gas gun obtained by improving an air switch used for a blowback gas gun for play.

  Conventionally, a gas gun for play in which a BB bullet is fired with compressed gas has been developed. Among the gas guns, a blowback gas gun described in Patent Document 1 is well known as a gas gun for play that can provide a feeling of use similar to that of a real gun.

  In such a blowback gas gun, the gas passage is opened by hitting the rear end of the gas discharge valve with a hammer or the like, and then the released compressed gas is used for bullet injection or for the slide blow bag operation. It has an air switch structure for switching between the two.

  Conventionally, a fixed air gun that does not move the slide is known for such a blowback gas gun, but in contrast to this fixed air gun, the blowback gas gun has a problem of leakage of compressed gas in the air switch. There is a problem in terms of the efficiency of use of compressed gas.

  An air switch used in a conventional blowback gas gun will be described with reference to the drawings. As shown in FIG. 10, in the front inside of a cylinder 41 provided above the compressed gas discharge passage 40, a communication passage 43 communicated with a chamber 42 (see FIG. 11) for seating a bullet before firing in front of the cylinder 41. A spring chamber 44 having an inner diameter slightly larger than that of the communication passage 43 is formed at the rear thereof. A switch spring 45 is accommodated in the spring chamber 44, and a switch storage chamber 47 having an inner diameter slightly larger than that of the spring chamber 44 is formed behind the spring chamber 44 through a circular plug port 46. 41 piston storage chambers 49 (see FIG. 11). A discharge port 50 communicating with the discharge passage 40 is formed below the switch storage chamber 47.

  The switch 51 housed in the switch housing chamber 47 is shown in a vertical cross-sectional shape in FIG. 10, but the actual shape is the switch spring 45 on the front side of the conical portion that opens and closes the circular plug 46. A guide portion 51a that moves inside is formed. Further, an O-ring 51b is fitted in the outer peripheral groove portion of the conical portion of the switch 51, and the O-ring 51b receives the gas pressure of the compressed gas discharged upward from the discharge port 50 and resists the elastic force of the switch spring 45. The plug port 46 is closed by pressing the switch 51 forward.

  The switch storage chamber 47 is provided with a pin 47a traversing the rear portion thereof, and the switch 51 urged rearward by the switch spring 45 is stopped by the pin 47a.

  With the above configuration, as shown in FIG. 11, when the hammer 53 is pulled down by the elastic force of a hammer spring (not shown) by pulling the trigger 52, the valve hammer piece 54 is pushed forward by hitting the hammer 53. The gas release valve 55 is pushed in. At this time, after the gas release valve 55 is opened by moving forward against the elastic force of the valve spring 56, the compressed gas supplied from the gas cylinder 57 provided therebelow is released to the release passage 40. The compressed gas flows into the cylinder 41 through the discharge port 50.

  Next, the piston 48 starts moving backward by the compressed gas flowing into the cylinder 41, and at the same time, the slide 58 fixed to the cylinder 41 starts moving backward. At this time, in the switch storage chamber 47 in front of the cylinder 41, the switch 51 is opened from the plug port 46 by the elastic force of the switch spring 45, and the compressed gas flowing from the gap of the plug port 46 is compressed in the chamber 42. The bullet B seated on is moved forward. Thereafter, the compressed gas supplied from the gas cylinder 57 is filled in the cylinder 41, whereby the switch 51 is pressed from behind, and the switch 51 closes the plug 46 as shown in FIG.

  However, at this time, the compressed gas supplied from the gas cylinder 57 is blown upward from the discharge port 50, and this compressed gas presses the side of the switch 51 from the lower side to the upper side. However, a gap is formed between the plug port 46 and the compressed gas leaks.

  In this way, there is a problem of leakage of compressed gas in the air switch 60. However, in the structure of the conventional air switch 60, the switch 51 is opened to the discharge port 50 below as described above. There is a possibility that the air switch 60 may be maliciously improved by using a slender tool from the discharge passage 40 below the discharge port 50.

JP-A-8-136188

  The present invention has been made in view of the above circumstances, and improves the use efficiency of compressed gas by eliminating the leakage of gas from the air switch used in the blowback gas gun for play, and the maliciousness of the air switch. It is an object of the present invention to provide a blowback gas gun which is prevented from being improved.

  In order to solve the above-mentioned problem, the blowback gas gun according to claim 1 of the present invention is a front inside of a cylinder provided above a compressed gas discharge passage in a blowback gas gun for play, and before the launch. A cylindrical switch case is fixed along an inner periphery communicating with a chamber in which a bullet is seated, and a switch having a spherical surface that is in close contact with a circular stopper formed on the rear side of the internal passage of the switch case. In addition, a switch spring is provided in the internal passage of the switch case to urge the switch to the rear side, and an open portion is formed at the upper portion of the discharge passage side of the switch case, and a lower portion of the open portion is on the discharge passage side With the structure having a blocking part that blocks the inflow of compressed gas from the compressed gas, the compressed gas flowing into the cylinder through the discharge passage goes around the outside of the switch case. Characterized in that so as to flow into the plug opening direction from above the opening.

  According to a second aspect of the present invention, the blowback gas gun according to the first aspect is formed with an inner peripheral projection that functions as a stopper when the switch moves rearward at the rear end of the closing portion of the switch case. It is characterized by that.

  Furthermore, the blowback gas gun according to claim 3 of the present invention is provided with a pin functioning as a stopper when the switch moves rearward along the outside of the rear end of the closed portion of the switch case. It is characterized by being.

  According to the blowback gas gun of the present invention, the shape of the switch is formed on a spherical surface that is in close contact with the circular plug port formed on the rear side of the internal passage of the switch case. In addition, an open part is formed at the upper part of the switch case on the discharge passage side, and a lower part of the open part has a blocking part for blocking inflow of compressed gas from the discharge passage side, so that it flows into the cylinder through the discharge passage. The compressed gas that flows around the outside of the switch case flows from the upper opening to the plug opening.

  For this reason, since the compressed gas supplied through the discharge passage first hits the blocking portion of the switch case and is cut off, the compressed gas does not directly hit the switch. It flows in the direction of the plug opening, and the inflow pressure of the compressed gas is relaxed.

  Furthermore, since the shape of the switch is a shape having a spherical surface that faces and closely contacts the circular plug opening, even if the switch is pressed from the side by the gas pressure of the compressed gas flowing in from the upper opening, the switch Since the spherical surface faces the circular plug port and comes into close contact with the circular plug port, the compressed gas is sealed without leaking from the plug port, and the use efficiency of the compressed gas is improved.

  Furthermore, according to the present invention, since the switch case closing portion is provided above the discharge passage, even if a thin tool or the like is inserted into the discharge passage, the switch housed in the switch case can be improved. Is impossible, and malicious improvements can be prevented.

1 is an overall cross-sectional view of a blowback gas gun according to an embodiment of the present invention. It is a principal part sectional view of the air switch of the blowback gas gun concerning the example of the present invention, and its circumference. It is a figure which shows the air switch of the blowback gas gun which concerns on the Example of this invention, (a) is a side view, (b) is an end view of a back side, (c) is an AA arrow line of (a). Sectional drawing, (d) is a longitudinal sectional view of (a). It is the whole perspective view which drew perspectively the air switch of the blowback gas gun concerning the example of the present invention. It is principal part sectional drawing which shows operation | movement of the blowback gas gun which concerns on the Example of this invention. It is principal part sectional drawing which shows operation | movement of the blowback gas gun which concerns on the Example of this invention. It is principal part sectional drawing which shows operation | movement of the blowback gas gun which concerns on the Example of this invention. It is principal part sectional drawing which shows operation | movement of the blowback gas gun which concerns on the Example of this invention. It is principal part sectional drawing which shows operation | movement of the blowback gas gun which concerns on the Example of this invention. It is a principal part sectional drawing of the air switch of the conventional blowback gas gun, and its periphery. It is principal part sectional drawing which shows the operation | movement of the conventional blowback gas gun. It is principal part sectional drawing which shows the operation | movement of the conventional blowback gas gun.

  Embodiments of the present invention will be described with reference to the drawings.

  As shown in FIG. 1 or FIG. 2, the structure of the air switch 1 of the blowback gas gun G of this embodiment is the front of a cylinder 3 provided above the compressed gas discharge passage 2 in the blowback gas gun G for play. The switch case 5 is fixed along the inner periphery that communicates with the chamber 4 in which the bullet B before firing is seated.

  The switch case 5 is formed in a cylindrical shape as shown in FIG. 2, FIG. 3, or FIG. 4, and has a spherical surface that faces and closely contacts a circular plug port 6 formed on the rear side of the internal passage. A switch 7 having a shape is provided. As this switch 7, a steel ball, a bearing, a plastic BB bullet or the like can be used. 2, 3, 4, etc., the switch 7 has a spherical shape, but the shape facing the circular plug port 6 has at least a spherical surface forming a part of a spherical shape. Even if it is not a perfect sphere, it can be used.

  A switch spring 8 is provided in the internal passage of the switch case 5 to urge the switch 7 rearward. One end of the switch spring 8 is supported by a pin 9 fixed so as to cross the inside of the vicinity of the front end of the switch case 5.

  In the present embodiment, the plug port 6 of the switch case 5 has an inner case 5b fixed inside a cylindrical outer case 5a, as shown in FIG. 3 (d), and a rear end of the inner case 5b. The spherical surface of the switch 7 is in close contact with the rear end side of the inner case 5b of the switch case 5 by a shape that is cut in the middle.

  Further, in this embodiment, an opening 10 is formed at the rear of the switch case 5, that is, at the upper portion on the discharge passage 2 side, and the lower portion of the opening portion 10 blocks the flow of compressed gas from the discharge passage 2 side. It has a configuration having a blocking portion 11. In the present embodiment, such an arrangement is formed by cutting the upper part of the outer case 5a while leaving the lower part on the rear side, thereby forming the opening part 10 and the lower part thereof as the closing part 11.

  In addition, a spherical switch 7 is provided in the switch storage chamber 5 c above the closing portion 11, and this switch 7 is elastically supported by the rear end of the switch spring 8, and further, at the rear end of the closing portion 11 of the switch case 5. An inner peripheral protrusion 12 is formed that functions as a stopper when the switch 7 moves rearward. As a member having this stopper function, the pin 13 may be fixed along the outside of the rear end of the closing portion 11 of the switch case 5 as shown in FIG.

  Further, in the above configuration, as shown in FIG. 2, a gap 14 is formed on the inner periphery of the cylinder 3 corresponding to the outer periphery of the closing portion 11 of the switch case 5, and the cylinder 3 passes from the discharge port 23 through the discharge passage 2. The compressed gas that flows into the gas flows around the outer gap 14 of the switch case 5 and flows from the upper opening 10.

  Here, a compressed gas supply structure and its peripheral structure in the blowback gas gun G configured as described above will be described. As shown in FIG. 1, a cylinder chamber 18 that houses a gas cylinder 17 that is a supply source of compressed gas is provided in the grip 16 of the gun body 15, and a magazine 19 is formed in front of the cylinder chamber 18.

  A valve case 20 is fixed in the middle of the discharge passage 2 extending from the upper side of the jet port 17a of the gas cylinder 17 into the cylinder 3, and a gas discharge valve 22 for opening and closing the discharge passage 2 is provided in the valve case 20. ing. By the opening operation of the gas discharge valve 22, the compressed gas passes through the discharge passage 2 and flows into the cylinder 3 through the upper discharge port 23.

  In the above configuration, as shown in FIG. 5, the blowback gas gun G of the present embodiment has a valve hammer that is struck by hammering of the hammer 21 when the hammer 21 is collapsed by the elastic force of a hammer spring (not shown) by pulling the trigger 24. The piece 25 is pushed forward, and the gas release valve 22 is pushed. At this time, the gas release valve 22 moves forward against the resilience of the valve spring 22a, and after the compressed gas supplied from the gas cylinder 17 provided therebelow is discharged to the discharge passage 2, the compressed gas is It flows into the cylinder 3 through the discharge port 23.

  Next, as shown in FIG. 6, the piston 27 starts moving backward due to the compressed gas flowing into the cylinder 3, and at the same time, the slide 28 fixed to the cylinder 3 starts moving backward. At this time, in the switch storage chamber 5 c in front of the cylinder 3, the switch 7 is opened from the plug port 6 by the elastic force of the switch spring 8, and the bullet B in which the compressed gas is seated in the chamber 4 through the opening gap of the plug port 6. To fire forward. After that, the cylinder 3 is filled with the compressed gas, so that the switch 7 is pressed from the rear against the elastic force of the switch spring 8, and the switch 7 closes the plug port 6 as shown in FIG.

  At this time, the compressed gas discharged from the discharge port 23 into the cylinder 3 through the discharge passage 2 first hits the closed portion 11 of the switch case 5 to block a direct collision with the switch 7, and then the switch case 5 Around the outside of the blocking part 11, it flows from the upper opening part 10 toward the plug port 6. Further, since the spherical surface of the switch 7 is in close contact with the circular plug port 6 in the switch case 5, the compressed gas is sealed without leaking from the plug port 6.

  Further, as shown in FIG. 7, when the switch 7 seals the plug port 6 of the switch case 5, there is no place where the compressed gas escapes, so that the compressed gas fills the cylinder 3 and the piston 27 in the cylinder 3 The slide 28 is pushed backward, and the slide 28 starts to move backward as shown in FIG.

  At this time, as shown in FIG. 8, the hammer 21 is tilted backward by the retraction of the slide 28. As a result, when the valve hammer piece 25 is retracted to release the pressure on the gas discharge valve 22, the gas discharge valve 22 is retracted by the elastic force of the valve spring 20a and the air passage 26 is closed. As a result, the compressed gas from the gas cylinder 17 is recovered. Is interrupted.

  Even after the supply of the compressed gas is cut off as described above, the slide 28 moves backward due to the inertia of the piston 27 and the expansion of the compressed gas remaining in the cylinder 3, and a part of the slide 28 hits the convex portion of the cylinder 3. Then, the slide 28 integrated with the cylinder 3 is operated so as to return to a predetermined position of the cylinder 3. At this time, the hammer 21 is raised by changing the holding position of the shear 29 by the pressing action of the slide 28, and the hammer 21 returns to a predetermined position.

  Next, as shown in FIG. 9, when the slide 28 is retracted until it abuts against the gun frame 30, the internal pressure in the cylinder 3 decreases and the elastic force of the switch spring 8 of the air switch 1 exceeds the internal pressure in the cylinder 3. The air switch 7 moves backward. Then, the plug port 6 is opened again, and the slide 28 advances by the elastic force of the spring 31 and returns to the original position shown in FIG.

  As described above, in this embodiment, the operation of the switch 7 of the air switch 1 is not affected by the compressed gas from the discharge passage 2 and the plug port 6 can be completely sealed. Thus, the use efficiency of the compressed gas is improved without leaking the compressed gas.

  Further, in this embodiment, the closed portion 11 of the switch case 5 is provided above the discharge passage 2 and the switch 7 is closed, so that a thin tool or the like is inserted into the discharge passage 2. However, it is impossible to improve the switch 7 housed in the switch case 5, and it is possible to prevent malicious improvement.

  The blowback gas gun of the present invention eliminates the leakage of gas from the air switch used in the blowback gas gun for play, improves the use efficiency of the compressed gas, and prevents the malicious improvement of the air switch. It can be used as a back gas gun.

DESCRIPTION OF SYMBOLS 1 Air switch 2 Release passage 3 Cylinder 4 Chamber 5 Switch case 5a Outer case 5b Inner case 5c Switch storage chamber 6 Plug opening 7 Switch 8 Switch spring 9 Pin 10 Opening part 11 Closure part 12 Inner peripheral protrusion 13 Pin 14 Gap 15 Gun body 16 Grip 17 Gas cylinder 17a Jet port 18 Cylinder chamber 19 Magazine 20 Valve case 20a Valve spring 21 Hammer 22 Gas discharge valve 23 Release port 24 Trigger 25 Valve hammer piece 26 Air passage 27 Piston 28 Slide 29 Shear 30 Gun frame 31 Spring
B bullet
G blowback gas gun

Claims (3)

A cylindrical switch case is fixed along the inner periphery of a cylinder provided above a compressed gas discharge passage in a blowback gas gun for play, and communicated with a chamber for seating a bullet before firing. A switch having a spherical surface that faces and closely contacts a circular plug port formed on the rear side of the internal passage of the switch case, and a switch spring that biases the switch rearward in the internal passage of the switch case And an opening is formed at the upper part of the discharge passage side of the switch case, and the lower part of the opening part has a closing part for blocking the inflow of compressed gas from the discharge passage side, so that the cylinder passes through the discharge passage. Compressed gas that flows into the outside of the switch case flows from the upper open portion toward the plug opening, and the blowback gas Cancer. The blowback gas gun according to claim 1, wherein an inner peripheral projection that functions as a stopper when the switch moves rearward is formed at the rear end of the closed portion of the switch case. The blowback gas gun according to claim 1 or 2, further comprising a pin that functions as a stopper when the switch moves rearward along the outside of the rear end of the closed portion of the switch case.