JPH0743238B2 - Automatic air gun - Google Patents

Description

TECHNICAL FIELD The present invention relates to an automatic air gun as a model gun.

(Prior Art) Conventional air guns have a single-shot type in which the cocking lever is manually operated each time and the compressed air of the piston fires a bullet one by one, and the pressure of the Freon gas and the compressed air tank causes continuous or single shots. There is a so-called gas type air gun that can be fired.

Conventionally, when trying to fire with a so-called gas gun, there is no choice but to use a tank, but when using CFC gas, there is a problem of environmental destruction, and there is a drawback that the pressure drop becomes large and it becomes difficult to use in winter. There is also. Although an air tank can be used, if the air consumption increases, a large one must be carried on the back, which is not preferable.

(Problems to be Solved by the Invention) The present invention has been made to solve the above-mentioned problems and drawbacks, and the problem is to drive a pump that produces compressed air by a motor and to pull a trigger. The aim is to be able to fire bullets, and to make single shots and continuous fires easy.

Although a battery-operated pump type has been introduced in magazines and the like in the past, none of them has been put on the market due to poor efficiency and high power consumption. Therefore, another object of the present invention is to use commercially available rechargeable batteries,
Moreover, it is an object of the present invention to provide a fully electric automatic air gun that operates efficiently and operates with a higher efficiency than conventional gas guns not only at room temperature but also at low temperature.

(Means for Solving the Problems) In order to solve the above problems, the present invention is fitted into a cylinder having an air injection port, sucks air into the cylinder by a backward movement, and at the same time accumulates a compression spring, and moves forward. An engine unit having a piston for compressing air and firing a bullet by jetting air; a drive unit including a rotating wheel that rotates in one direction in conjunction with the piston to retract the same and a motor that drives the rotating wheel; , Provided on the gun body,
An operating unit including a trigger for opening and closing a switch of a circuit for operating the motor, between the switch and the trigger, the trigger is releasably engaged, the switch is closed when the switch is engaged, and the switch is closed when the switch is disengaged. Provide a shear that is urged away from the switch in the direction to open the circuit,
A tappet arm that engages with a cam that is provided coaxially with the rotating wheel of the drive unit and that interlocks the cam and the shear at the timing of disengaging the trigger after the completion of the switching operation of the shear is provided, and engages with the tappet arm. A means for detaching the arm is provided so that the arm is disengaged from the engagement state with the sear at the time of engagement, and a position where the interlocking of the cam and the sear is broken and a position not engaging with the tappet arm are provided. It was taken.

The engine section is a requirement for pumping by the piston, the drive section is a requirement for driving the piston, and the operating section is a requirement for operating the motor by a trigger operation. The bullet can be fired by performing. Although it is desirable that the bullet feeding portion has a structure suitable for full automation, it is natural that the air gun of the present invention can be constructed even by the gravity feeding method.

(Example) Hereinafter, description will be given with reference to the drawings. In each figure, 1 is the engine section, 2
Is a drive unit, 3 is an operation unit, and 4 is a bullet feed unit. The cylinder 11 that constitutes the engine portion 1 has a jet 12 of compressed air at one end, is arranged coaxially rearward with the barrel 19 of the gun body 5, and allows the piston 13 to move forward and backward from the rear side where it is opened. It has been inserted. The piston 13 has a sealing member 15 such as an O-ring between it and a plug 14 provided at the front end of the piston 13 to ensure airtightness with the inner wall of the cylinder. Reference numeral 16 denotes a shock absorber provided on the front wall of the cylinder. The compression spring 17 that stores pressure by the piston has a front part that enters the hollow piston rear part, and the rear part is received by the base part of the spindle 18 that is fixed to the air gun body side. It has a strong spring force to push out.

Since the piston is driven by the drive unit 2, a rack 20 having a large number of teeth along the axial direction is provided on the lower surface of the piston 13, and the first teeth 21 thereof are strong enough to project from other rack teeth by a required amount. It has become a thing. This is a rotating wheel 23, which will be described later.
The engagement with the tooth portion 24 of the drive gear is ensured and facilitated.
On the other hand, a recess 22 that does not mesh with the tooth portion 24 is provided outside the rearmost end of the rack tooth in the moving direction. Such rack teeth are provided over a length for moving the piston 13 by a required stroke, and this movement is performed by meshing rotation from one end of the tooth portion 24 of the rotary wheel 23 to the other end. That is, the rotating wheel 23
Is a fan-shaped tooth portion 24 having a number of teeth enough to move the piston 13 and a toothless portion having a small diameter that does not interfere with the first teeth 21 and the rack teeth and does not hinder the compression operation of the piston after pressure accumulation. Transmission means consisting of 25 and a reduction gear set
It is connected to the motor 27 via 26. A charging pack type nicad battery is used as a power source 28 for driving the motor 27, and the nicad battery is removably mounted in the gun barrel 6.

The operation unit 3 includes a switch 31 of the motor drive circuit and a trigger 32.
And, it is opened and closed by a shear 33 interposed between them. With this, when the trigger 32 is pulled, it is connected to the power supply 28, and the rotating wheel 23 makes one rotation so that the piston 13 can be operated. The illustrated operation portion 3 is engaged with a cam 34 provided coaxially with the rotary wheel 23 of the drive portion 2, and is engaged with the cam 34 at a timing at which the engagement with the trigger 32 is released after the switching operation of the sear 33 is completed. A tappet arm 35 for performing a seesaw motion is provided to disengage the engagement 36 between the sear 33 and the trigger 32 to open the closed switch 31. Reference numeral 37 is a switching lever that cuts off the arm operation and cuts the interlocking with the sear 33, and can select two positions, that is, the interrupted continuous position and the switched single-shot position. Reference numeral 38 denotes a spring that biases the shear 33 toward the trigger 32, and 39 denotes a spring that presses the tappet arm 35 against the switching lever 37.

The bullet feed chamber 40, in which the bullet feed unit 4 is provided, has an air injection port 12 and a barrel.
Bullets b located between 19 and supplied to the chamber 40 from below
A bullet feed opening 41 of a size that allows the bullets to pass through one by one is opened, and a bullet b pushed by the supply spring 42 can enter through the opening 41. The bullet b supplied is held by the packing 43 in the front until it is fired. A shutter member 44 is provided to control the bullet feed, and the member 44 is a bullet feed port.
It is installed so that it can be reciprocated in the axial direction only for the stroke of opening and closing 41. The illustrated shutter member 44 is the rotary wheel.
It is integrally provided at the tip of a slide arm 45 extending in the direction of 23. At the rear end of the slide arm 45, a piece-like engaging means 47 is provided, which engages with a pin-like engaging portion 48 provided around the axis of the rotary gear. Since the illustrated arm 45 is biased by the spring 49 in the closing direction, the engagement is performed under this force. In each figure, 50 is a magazine, 51 is its attaching / detaching part,
Reference numeral 52 is a removable lever having a magazine engaging claw 53, 54 is a space for reciprocating the shutter member 44, and 55 is a spacer for forming the space.

(Operation) In the air gun of the present invention configured as described above, as described above, when the trigger 32 is pulled and the motor 27 rotates, the rotary wheel 23
Rotation causes the teeth 24 and the rack 20 to mesh with each other,
13 is retracted to store the pressure in the compression spring 17, and the toothless portion 25 and the recess 22
At this time, the piston 13 instantaneously advances, the air sucked into the cylinder is compressed and ejected from the ejection port 12, and the bullet b stopped immediately before that can be fired.

At that time, the drive unit 2 supplies a unidirectional rotational power for performing the above operation, and this power is controlled by the operation of the operation unit 3.

That is, when the switching lever 37 is in the single-shot position, the rotation of the rotary wheel 23 causes the engagement between the sear 33 and the trigger 32 to be disengaged and re-engaged each time one shot is fired. When the lever 37 is switched to the continuous position, the tappet arm 35 is flipped up and does not engage with the sear 33, and the operation of the trigger 32 is either closing or opening the switch 31 via the sear 33.
As long as the trigger 32 is pulled, the motor 27 continues to rotate, air suction, bullet opening, bullet set in the bullet chamber, air compression,
The above series of firing operations of closing the supply port, increasing the pressure, and firing the bullet are continuously repeated.

(Effects) The present invention is configured as described above, and a kind of pump composed of a piston and a cylinder is driven by rotation of a motor, whereby compressed air is ejected from an ejection port every time, and a feed is synchronized with this. Bullets can be fired by simply pulling the trigger.Since these bullet feeding and firing operations are performed only by the rotation of the motor, the rotation time and timing of the motor can be adjusted. The effect is that it is possible to easily perform single shots or continuous shots simply by controlling. Therefore, according to the present invention, unlike the conventional gas gun, there is no problem of serious pressure drop in winter and no problem of environmental damage, and it is not necessary to carry a tank, and a small and high performance one can be obtained.

[Brief description of drawings]

The drawings show an embodiment of an air gun according to the present invention.
The figure is a sectional view of the whole, FIGS. 2 to 5 are operation explanatory views in a semi-automatic (single shot) state, FIG. 6 is an operational explanatory view in a full-automatic (fired) state, and FIG. 7 is a perspective view of an operating portion. Is. 1 ... Engine part, 2 ... driving part, 3 ... operating part, 4 ... bullet feed part, 11 ... cylinder, 12 ... air injection port, 13 ... piston, 17 ... compression spring, 20 ... … Rack, 23 …… Rotating wheel,
27 …… Motor, 28 …… Power supply, 31 …… Switch, 32 …… Trigger, 33 …… Shear, 35 …… Tapet arm, 40 …… Billing chamber, 41 …… Billing port, 45 …… Sliding arm , 50 …… Magazine.

Claims (2)

[Claims] 1. A cylinder fitted with an air injection port,
An engine portion having a piston that sucks air into the cylinder by retreating operation and at the same time accumulates pressure in a compression spring, compresses air by advancing operation, and ejects a bullet by jetting air.
A rotating wheel that has a toothed portion that meshes with a rack of the piston and a toothless portion that releases the piston and that rotates in one direction, and a motor that drives the rotating wheel, in association with the piston to retract the piston. A drive unit including the operation unit, and an operation unit provided on the gun body, the operation unit including a trigger for opening and closing a switch of a circuit for operating the motor, and the trigger is removably engaged with the switch between the switch and the trigger. Then, when engaging, the switch is closed, and when disengaged, it is separated from the switch and provided with a biased shear in the direction of opening the circuit,
A tappet arm that engages with a cam provided coaxially with the rotating wheel of the drive unit and that interlocks the cam with the shear at the timing of disengaging the trigger after the completion of the switch operation of the shear is provided, and is engaged with and disengaged from the tappet arm. It is possible to disengage the arm from the engagement state with the sear at the time of engagement and to provide a switching lever that can select a position where the interlocking of the cam and the sear is cut and a position where the tappet arm is not engaged. Automatic type air gun. 2. A bullet feed chamber for temporarily holding a bullet in front of an air ejection port, a bullet feed port for passing a bullet urged toward the chamber to the bullet feed chamber one by one, and the bullet feed. A slide arm that opens and closes the mouth and that moves in the axial direction, an engaging portion provided around the axis of the rotating wheel, and the shutter are interlocked to open and close the shutter once by one rotation of the rotating wheel. 2. The automatic air gun according to claim 1, wherein a bullet feed section consisting of and is provided in the main body.