JP3239160U - CO2 air gun gas release valve device - Google Patents

Abstract

[Problem to be solved] [ _CO2 gas intake amount> _CO2 gas release amount] in the valve assists the force to stop gas release, and the force ₍ spring force) to stop gas release can be made very small. A gas release valve device for an air gun is provided.
[Solution] A non-pressure valve is adopted as a release valve, and even CO ₂ ( _high pressure) can be released with a small force. Amount> _CO2 outgassing amount] to assist the force to stop the release of gas (the force of the coil spring 25 and the closing assist O-ring or V-ring 16) and make the force to stop the release of the gas (spring force) very small. can do.
[Selection drawing] Fig. 3

Description

The present invention relates to a _CO2 air gun gas release valve device that operates with a small force.

First, there are the following prior arts of the present invention.
Utility Model Registration No. 3206631 (See Patent Document 1, Tanio Koba Co., Ltd.)
In the gas release valve of an air gun that uses _CO2 gas as a power source and is mounted in its body to fire BB bullets, the valve shaft arranged in the gas release valve body is opened, and the gas in the _CO2 gas cylinder is released into the valve. In order to prevent gas from leaking from between the valve body and the valve shaft when gas flows into the valve body and pressure is applied to the valve body, a U-shaped cross-sectional leak prevention packing is provided inside the valve body to prevent leakage. The lip part of the stop packing works to tighten the valve shaft in proportion to the pressure of the inflow gas. The slotted shape of the head for screw rotation is an oblique V-shaped groove that can be rotated in the mounting direction of the mounting screw, but cannot be rotated in the opposite direction due to its slope. A gas discharge valve device for a _CO2 air gun, characterized by having a valve body head shape that can prevent replacement.

Patent No. 5999572 (see Patent Document 2, Marushin Industry Co., Ltd.)
A gas passage is provided between a supply source of compressed gas and a chamber in which the bullet is seated before firing, and a release valve is inserted through a gas hole of a valve sleeve provided in the middle of the gas passage, and the release valve is axially moved. A gas gun that opens and closes a gas hole of a valve sleeve by moving, wherein a lubricating synthetic resin valve ring is attached to the tip of the gas hole of the valve sleeve, and a release valve is provided in the gas hole of the valve ring. The valve head provided on the head of the rod portion has a tapered throttling surface, and the throttling surface is seated on the seating portion of the gas hole of the valve ring, whereby the gas of the valve sleeve A gas gun in which a gas hole in a valve sleeve is opened by closing the hole and opening the gas hole in the valve sleeve by striking the rear end of the release valve with a hammer or striker to disengage the throttle surface of the release valve from the seating portion of the valve ring. A gas gun, characterized in that one end of a valve spring is inserted into an annular groove of a protrusion projecting toward the head of the gas gun, and the other end of the valve spring is supported by being brought into contact with the wall surface of the gas passage.

Utility Model Registration No. 3206631 Patent No. 5999572 U.S. Patent No. 7,862,006

The problem to be solved is that the conventional _CO2 air gun gas release valve device cannot be made to operate with a small force.

Therefore, in the gas discharge valve device for the CO ₂ air gun of the present invention, a shaft provided at an intermediate position is housed in the cylindrical main body of the CO ₂ air gun so as to be movable back and forth.
A CO ₂ gas intake hole is opened at the tip position of the cylindrical main body, and O-rings or V-rings are arranged on both sides of the relevant portion of the shaft.
In addition, a _CO2 gas release hole through which _CO2 gas passes is also opened in the vicinity of the engaging portion of the shaft of the cylindrical main body.
The tip of the tubular body of the release valve is pressed against the wall surface via an O-ring and a V-ring 11 to provide a tight seal between the atmosphere and the _CO2 gas chamber.

A coil spring is arranged on the other side of the locking ring of the shaft via an O-ring or a V-ring, and a shaft pressing portion is attached to the end of the shaft.
Before the shaft is pressed against the shaft pressing portion, the shaft is retracted by the pressing force of the coil spring, and the locking ring is engaged with the locking portion in the cylindrical main body, resulting in the state shown in FIG. As shown, the shaft pressing portion protrudes from the rear end of the tubular body.

As shown in FIG. 3, when the shaft is pushed forward from the state in which the CO ₂ gas chamber is filled with CO ₂ gas, the CO ₂ gas flows from the CO ₂ gas intake hole to the rear of the shaft. _CO2 gas is released to the atmosphere from the _CO2 gas release holes. _CO2 gas continues to be released from the _CO2 gas release hole while the shaft pressing part is pressed. >Gas emission force], the force in the direction to move the shaft backward is assisted in the same way as the coil spring, and the emission of _CO2 gas is stopped.

The shaft retracts and the locking ring engages a locking portion in the tubular body to cut off _CO2 gas emissions.

According to the present invention, it is possible to obtain a gas release valve device for a _CO2 air gun that operates with a small force.
In other words, by adopting a pressureless valve mechanism, the force to stop the release of gas is provided by the [CO ₂ gas intake amount > CO ₂ gas release amount] mechanism inside the valve, not only when the gas is released but also when the gas release is stopped. It is now possible to provide a gas release valve for a _CO2 air gun that operates with a spring force of 10N to 20N to assist and stop gas release.

The unique point of this invention is that a non-pressure valve is adopted as this release valve, and CO ₂ (high pressure) can be released with a small force. As a unique mechanism, [the amount of CO ₂ gas drawn in > the amount of CO ₂ gas released] in the valve assists the force that stops the release of gas, and the force that stops the release of gas (the force of the spring) can be made very small. It is possible.
The release valve of US Pat. No. 7,862,006 also has a very large spring to stop gas release. However, in filing the present invention, it can be emphasized that there is an advantage that less force is required to stop the released gas.
That is, by adopting a pressureless valve mechanism, even if the _CO2 gas is under high pressure, it is possible to release it with a weak force, but the higher the pressure of the _CO2 gas, the greater the force required to stop the release. Become.

1 is a schematic side view of the gas release valve device of the _CO2 air gun of the present invention; FIG. It is a schematic AA cross-sectional view of the state in which no gas is emitted. It is a schematic AA cross-sectional view of the state in which gas is being discharged.

1 to 3, the gas release valve device of the low force _CO2 air gun of the present invention will be described in detail.
FIG. 1 is a schematic side view of the gas release valve device for the CO ₂ air gun of the present invention, and FIG. 2 is a schematic AA cross-sectional view of the gas release valve device for the CO ₂ air gun of the present invention in a state where gas is not released. 3 is a schematic AA cross-sectional view of the gas release valve device of the CO ₂ air gun of the present invention in a state in which gas is being released.
The feature of the present invention is that the non-pressure valve mechanism is adopted, and the gas is released by the [CO ₂ gas intake amount > CO ₂ gas release amount] mechanism inside the valve even when the gas release is stopped, of course, when the gas is released. It is possible to provide a CO ₂ air gun gas release valve that assists the release stopping force and operates at a spring force that stops the gas release from 10N to 20N.

The non-pressure valve is a type of stop valve and is also called a balance valve, and is said to be able to open with a small force even when a high pressure is applied.
1 and ₂ show the _CO2 air gun gas release valve device of the present invention in a state in which no gas is released. and seal the front CO ₂ gas intake hole 17 (rear end) in the release valve 20 . The air release hole and oil injection hole 19 are sealed with an O-ring or a V-ring 11 .
In the cylindrical body 21 of the _CO2 air gun, a shaft 24 provided with a locking ring 32 that engages with a locking portion 31 provided at an intermediate position is incorporated so as to be able to move back and forth. A front CO ₂ gas intake hole 17 through which CO ₂ gas from a CO ₂ gas filling section 33 arranged outside passes is opened at the tip position of the shaped body 21 . A pair of O-rings or V-rings 13 and 14 are provided on both sides of the CO ₂ gas intake hole 17 portion.

Next, the O-rings or V-rings 13 and 14 arranged at predetermined intervals form a CO ₂ gas chamber 22 inside the tubular body 21 and a route through which the gas released from the release valve 20 flows into the tubular body 21 . to seal.
The O-rings or V-rings 13, 14 then seal to prevent the gas released from the release valve 20 from being released outside the tubular body 21. As shown in FIG.
By drawing gas into the discharge valve 20 from the front _CO2 gas intake hole 17 located between sealed with spaced O-rings or V-rings 13, 14, the tubular body during gas discharge The effect of gas pressure on the piston motion of 21 and shaft 24 can be eliminated.

A rear _CO2 gas discharge hole 18 through which _CO2 gas passes is also opened in the vicinity of the locking ring 32 of the shaft 24 of the cylindrical body 21, and the pair of O-rings or V-rings 13, 14 is provided. A CO ₂ gas chamber 22 is formed on the surface of the shaft 24 between and the locking ring 32 .
At the rear _CO2 gas release hole 18 in the release valve 20, the location of the _CO2 gas chamber 22 inside the cylindrical body 21 is compressed during gas release, so gas is released from the rear _CO2 gas release hole 18. It is done.
FIG. 3 shows the state in which the gas is released.
Then, the piston movement of the shaft 24 moves the O-rings or V-rings 13, 14 over the front _CO2 gas intake hole 17, thereby forming the front _CO2 gas intake hole 17 and the rear _CO2 gas discharge hole 18. Then, gas is discharged from the rear CO ₂ gas discharge hole 18 .

The O-ring or V-ring 12 and the O-rings or V-rings 13, 14 have the following roles. That is, sealing is performed so that the gas drawn from the front CO ₂ gas intake hole 17 is released from the rear CO ₂ gas release hole 18 without loss.
A coil spring 25 is arranged on the other side of the locking ring 32 of the shaft 24 , and a shaft pressing portion 26 is attached to the end of the shaft 24 with the coil spring 25 interposed therebetween.
Further, before the shaft pressing portion 26 is pressurized, the shaft 24 is in the retracted position due to the pressing force of the coil spring 25, and the locking ring 32 is locked in the tubular main body 21. The shaft pressing portion 26 is in a state of being engaged with the portion 31 and protruding from the rear end of the tubular main body 21 .

Then, when the shaft 24 is pushed forward by the shaft pushing portion 26 from the state in which the CO ₂ gas (blue portion) is filled by the CO ₂ gas filling portion 31 , the CO ₂ is discharged from the front CO ₂ gas intake hole 17 . Gas flows into the rear of the shaft 24, but the shaft 24 retreats and engages with the locking portion 31 to block the release of _CO2 gas.
In addition, the mechanism of the rear CO ₂ gas discharge hole 18 (gas intake amount>gas discharge amount) receives the force in the direction of stopping gas at the time of gas discharge, and stops gas discharge when the CO ₂ gas pressure is 4 Mpa to 8 Mpa. Assist force, release valve 20 stops gas release at spring force of 10N to 20N.
In this manner, the shaft 24 is operated with a small force, which is the feature of the gas release valve device for the _CO2 air gun of the present invention.

While the shaft pressing portion 26 is being pressed, CO ₂ continues to be released from the rear CO ₂ gas release hole 18 . 16 assists the force in the direction of retracting the shaft 24 like the coil spring 25 from the relationship of [gas intake amount>CO ₂ gas release amount], and the gas release valve device of the CO ₂ air gun that operates with a small force according to the present invention is , so-called air gun, etc., can be very usefully utilized.

11 O-ring or V-ring 12 O-ring or V-ring 13 O-ring or V-ring 14 O-ring or V-ring 15 O-ring or V-ring 16 Closure assist O-ring or V-ring 17 _CO2 gas intake hole 18 _CO2 gas release Hole 19 Air release hole & oil injection hole 20 Release valve assembly
21 release valve tubular main body 22 _CO2 gas chamber 23 atmosphere 24 shaft 25 coil spring 26 shaft pressing portion 31 locking portion 32 locking ring 33 _CO2 gas charging portion

Claims (1)

In the cylindrical main body of the _CO2 air gun, a _shaft is housed in a locking portion provided at an intermediate position so as to be able to advance and retreat. O-rings or V-rings are arranged on both sides of the _CO2 gas intake hole portion, and a rear _CO2 gas release through which _CO2 gas also passes near the locking ring of the shaft of the tubular body. A hole is opened and a _CO2 gas chamber is formed in the pair of O-rings or V-rings and the shaft surface,
A coil spring is arranged on the other side of the locking ring of the shaft, and a shaft pressing portion is attached to the end of the shaft with the coil spring interposed therebetween,
Before the shaft pressing portion is pressurized, the shaft is in the retracted position due to the pressing force of the coil spring, and the locking ring engages with the locking portion in the tubular body to move the shaft. The pressing portion is in a state of protruding from the rear end of the tubular body,
When the shaft moves forward by being pressed by the shaft pressing portion, the CO ₂ gas flows from the front CO ₂ gas intake hole to the rear of the shaft, and the shaft operates with a small force. ₂ Air gun gas release valve device.

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