JPH06137790A - Electrically operated air toy gun - Google Patents

Abstract

PURPOSE:To perform an efficient launching of bullet at a high initial speed with a motor being applied as a power source without using any fluorocarbon gas. CONSTITUTION:There are provided a cylinder 1, a piston 2 sliding within the cylinder 1 and for pressurizing air, a ram 8 connected to the piston through a spring 9 and for reciprocating the piston 2, a crank shaft 10 connected to the ram 8 through a connecting rod 12, an opening or closing valve 6 connected between an air discharging passage 15 of the cylinder 1 and a nozzle 4, a link 13 connected to a valve body 6A of the opening or closing valve 6, an eccentric cam for driving the link 13, and a motor for rotating both the eccentric cam and the crank shaft 10. The ram 8 driven to reciprocate by the crank shaft 10 drives the piston 2 through the spring 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric air toy gun in which a motor rotates a crankshaft to shoot a bullet.

[0002]

2. Description of the Related Art Currently used toy guns include those using liquefied CFC gas as a power source and those using pressurized air as a power source. Toy guns that use liquefied Freon gas
It has the feature of firing many bullets with a small cylinder. This is because CFCs are stored in a liquefied state, so that they are vaporized and the volume is significantly doubled. Toy guns that use pressurized air as a power source, on the other hand, require a large air tank to fire many bullets. Large air tanks cannot be equipped on guns. Therefore, it is necessary to connect an air tank different from the gun to the gun with a hose, which is extremely inconvenient. Most toy guns that use liquefied chlorofluorocarbon do not have this drawback and have this structure. However, CFCs have a harmful effect of destroying the ozone layer.

A toy gun that does not use CFC and uses a motor as a power source does not have this drawback. A toy gun of this structure is described in Japanese Utility Model Laid-Open No. 3-104689. The toy gun described in this publication, as shown in FIG. 1 and FIG.
The piston is reciprocated in the cylinder 1 to fire a bullet. This toy gun slows down the rotation of the motor 3 with gears,
A rack that meshes with the gear is provided on the lower surface of the piston 2. When the motor 3 makes a half rotation of the motor 3 from the position shown in FIG. 1 to the position shown in FIG. 2, the piston 2 is pulled. When the gear is rotated further from the position shown in FIG. 2,
The rack of the piston 2 is disengaged from the gear and is pressed by the spring to compress the air in the cylinder 1 and the nozzle 4 at the tip.
Fire a bullet from. Nozzle 4 until the bullet is fired
Is stopped by a rubber blocking ring 5 disposed in front of the.

[0004]

The toy gun of this structure is
Can be miniaturized without using CFCs. However, it is not possible to fly the bullet efficiently at a high initial velocity. This is because the bullet moves forward from the blocking ring 5 while the piston 2 is moving forward. In order to fire the bullet in an ideal state, it is necessary to lock the bullet with the blocking ring 5 until the piston 2 is advanced most forward. Bullet blocking ring 5
This is because the piston 2 cannot pressurize the air in the cylinder to a sufficiently high level when moving forward from the position. However, in order for the blocking ring 5 to lock the bullet in this state, the blocking ring 5 needs to strongly hold the bullet, which increases the resistance of the bullet to pass through the blocking ring 5. Further, if the piston 2 cannot sufficiently pressurize the air, there is a drawback that the bullet cannot pass through the blocking ring 5.

A toy gun that solves this drawback is disclosed in Japanese Unexamined Patent Publication No.
No. 191298. In the toy gun described in this publication, as shown in FIG. 3, an opening / closing valve 6 is provided at the tip of a cylinder 1, and the opening / closing of the opening / closing valve 6 is controlled by a forward piston 2. The open / close valve 6 is closed without being pressed by the piston 2. When the piston 2 moves to the most tip, the on-off valve 6 is pressed and opened, the air pressurized in the cylinder 1 is jetted from the nozzle 4, and the bullet held by the blocking ring 5 is fired. The toy gun of this structure has a feature that it can hold a bullet on the blocking ring 5 until the piston 2 advances to a predetermined position.

However, this toy gun has a drawback that the pressing force of the piston 2 becomes extremely strong when the initial velocity of the bullet is set to a velocity comparable to that of CFC gas. This is because the on-off valve 6 is closed until the piston 2 is advanced to the tip. Therefore, there is a drawback that the power consumption of the power source for driving the piston 2 is extremely large, and the use time of the battery for driving the power source is extremely short. When the piston 2 is driven by the solenoid 7 or the like, it is difficult to increase the pressing force, and it is impossible to make the initial velocity of the bullet equal to that of CFC.
It is possible to press the piston strongly, for example by using a reduction motor or the like. However, even if the piston 2 is driven by the deceleration motor, there is a drawback that the motor is significantly overloaded at the most advanced position of the piston. This is because the air is compressed into a small volume immediately before the opening / closing valve 6 is opened. For this reason, an excessive current flows to the motor, causing it to burn out, and the fuse has blown,
Alternatively, there are drawbacks such as shortening the life of the driven battery.

The present invention was developed with the object of resolving this drawback, and an important object of the present invention is to use a motor as a power source without using CFC gas, to efficiently and reasonably and quickly use an ammunition. It is to provide an electric air toy gun that can be launched at initial velocity.

[0008]

In order to achieve the above-mentioned object, the device of the present invention has the following constitution. That is,
The electric air toy gun of the present invention includes a cylinder 1 and a piston 2 that reciprocates in the cylinder 1 to pressurize air.
A ram 8 connected to the piston 2 via a spring 9 to reciprocate the piston 2, a crankshaft 10 connected to the ram 8 via a connecting rod, an air discharge path of the cylinder 1 and a nozzle 4. Open / close valve 6 connected between
And a drive member for reciprocating the valve body of the opening / closing valve 6 in synchronization with the ram 8, and a motor 3 for rotating the crankshaft 10 and driving the drive member.

When the motor 3 rotates the crankshaft 10, the crankshaft 10 pushes the piston 2 into the cylinder 1 through the connecting rod, the ram 8 and the spring 9 to pressurize the air. In this state, the spring 9 that connects the ram 8 and the piston 2 is compressed. When the drive member opens the on-off valve 6 in this state, the pressurized air in the cylinder 1 is jetted from the nozzle 4 and fires a bullet. Cylinder 1
When air is ejected from the cylinder 1, the cylinder 1 connecting the ram 8 and the piston 2 is expanded by the elastic force, and the piston 2 is further advanced to inject pressurized air.

[0010]

The electric toy gun of the present invention fires bullets as follows. The motor 3 rotates the crankshaft 10 to retract the ram 8 via the connecting rod 12. The ram 8 retracts the piston 2 via the spring 9. At this time, the open / close valve 6 is opened, and the outside air is sucked into the cylinder 1. When the crankshaft 10 is further rotated, the ram 8 is advanced. The advancing ram 8 pushes the piston 2 into the cylinder 1 via the spring 9. When the ram 8 is advanced, the open / close valve 6 is closed. Therefore, ram 8
As the piston moves forward, the piston 2 compresses the air in the cylinder 1. Ram 8 is piston 2 through spring 9
Is pushed into the cylinder 1. In this state, the spring 9 is compressed in balance with the air pressure in the cylinder 1. When the ram 8 is pushed into the leading edge or in the vicinity thereof, the open / close valve 6 is opened. When the opening / closing valve 6 is opened, the compressed air in the cylinder 1 is ejected from the nozzle 4 and the bullet held in the blocking ring 5 is pneumatically ejected. When pressurized air is jetted from the nozzle 4, the pressure in the cylinder 1 drops. Therefore, the compressed spring 9 expands, and a larger amount of air is ejected from the nozzle 4 to effectively accelerate the bullet. This operation is completed almost instantly. After that, the actions of or are repeated to fire bullets one after another.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. However, the examples shown below exemplify an air toy gun for embodying the technical idea of the present invention, and the air toy gun of the present invention has a material, a shape, a structure, and an arrangement of components. It is not specific to the structure below. The air toy gun of the present invention can be variously modified within the scope of claims.

Further, in this specification, for easy understanding of the claims, the numbers corresponding to the members shown in the embodiments are referred to as "claim column", "action column", and "action column". It is added to the members shown in the section of "Means for Solving the Problems". However, the members shown in the claims are
It is by no means specific to the members of the examples.

The electric toy gun of the present invention is characterized by a mechanism for injecting air from a nozzle and firing a bullet held by a blocking ring. Structures such as the mechanism for delivering ammunition to the stop ring can use mechanisms now in use or to be developed. Therefore, the mechanism for injecting the pressurized air to the blocking ring will be described in detail below.

The pressurized air injection mechanism shown in FIG. 4 includes a cylinder 1, a piston 2 which reciprocates in the cylinder 1 to pressurize the air, and a piston 2 which is connected to the piston 2 via a spring 9. A reciprocating ram 8 and a crankshaft 1 connected to the ram 8 via a connecting rod 12.
0, an open / close valve 6 connected between the air discharge passage of the cylinder 1 and the nozzle 4, a drive member for driving the valve body of the open / close valve 6, and a motor 3 for rotating the crankshaft 10. The drive member includes a link 13 connected to the valve body and an eccentric cam 11 that drives the link 13, and the eccentric cam 11 is fixed to the crankshaft 10. However, FIG. 4 shows the state in which the crankshaft 10 is rotated 90 degrees for the sake of clarity.

The cylinder 1 is cylindrical and has a rear end opened and a front end closed by a lid member 14 provided with an opening / closing valve 6. Lid material 1
4, an air discharge passage 15 is provided so as to communicate with the inside of the cylinder 1, the on-off valve 6 is connected to the middle of the air discharge passage 15, and the nozzle 4 is fixed to the discharge side. The rear end of the cylinder 1 is fixed with a stopper that prevents the ram 8 from slipping out.

The piston 2 is inserted in the cylinder 1 so that it can slide in an airtight manner. The piston 2 has a spring 9 and a ram 8 built therein. For this reason, the piston 2 has a cylindrical shape with its front end closed and its rear end open. The piston 2 is provided with an O-ring on the sliding surface with the cylinder 1 to improve airtightness.

The spring 9 is a coil spring, one end of which is connected to the piston 2 and the other end of which is connected to the ram 8. Spring 9
Are spirally wound so that the outer diameter is slightly smaller than the inner diameter of the piston 2. The spring 9 is compressed to store energy when the ram 8 is in the most advanced state. When the spring 9 is hardened, the energy stored in the spring 9 increases. Therefore, the initial velocity of the bullet can be adjusted by adjusting the elastic coefficient of the spring 9. However, if the spring 9 is too hard, it is necessary to increase the force for moving the ram 8 forward. Especially when the ram 8 is at the most advanced position
It is necessary to strengthen the forward power of. When the advancing force of the ram 8 increases, the rotation torque of the crankshaft 10 increases and the load current of the motor 3 increases. Therefore, the elastic coefficient of the spring 9 is adjusted to an optimum value by making effective use of the initial velocity of the bullet and the load current of the motor.

The ram 8 has a cylindrical shape that can slide inside the piston 2, and has a brim at the rear end for connecting and pressing a spring 9. A protrusion for connecting the connecting rod 12 is provided at the rear end of the ram 8.

The connecting rod 12 has its tip connected to the protrusion of the ram 8 so as to be rotatable via a pin. The rear end is rotatably connected to the crank pin of the crankshaft 10.

The crankshaft 10 is located behind the cylinder 1,
It is arranged so that it can rotate via a bearing (not shown). As shown in FIG. 5, the crankshaft 10 has a gear 17 and an eccentric cam 11 concentrically stacked and fixed. The gear 17 fixed to the crankshaft 10 is the motor 3
Meshes with a small gear 18 fixed to the rotary shaft of
Therefore, the crankshaft 10 is rotated. Motor 3 is
The crankshaft 10 is rotated in a certain direction to shoot a bullet.
When the motor 3 rotates the crankshaft 10 once, one bullet is fired.

Eccentric cam 11 fixed to crankshaft 10
Opens and closes the on-off valve 6 in synchronization with the reciprocating motion of the piston 2. The planar shape of the eccentric cam 11 is shown in FIG. The eccentric cam 11 shown in this figure opens the on-off valve 6 in the state in which the crankshaft 10 rotates half a turn, and closes the on-off valve 6 in the remaining half rotation.

The eccentric cam 11 is connected to the valve body of the on-off valve 6 via a link 13. The link 13 is an opening / closing lever 13 that is inserted into a through hole of the valve body to move the valve body in the axial direction.
A and the link rod 13 connected to the opening / closing lever 13A
B and a rocker arm 13C that is connected to the other end of the link rod 13B and slides along the outer circumference of the eccentric cam 11 and is composed of three members. The opening / closing lever 13A and the rocker arm 13C are rotatably connected via a pin. The rocker arm 13C has an L-shape as a whole, and its tip is slid on the outer circumference of the eccentric cam 11. Although not shown, the rocker arm 13C is provided so that the tip of the rocker arm 13C is along the outer circumference of the eccentric cam 11.
C is elastically biased by a spring.

The link 13 shown in this figure performs the following operation to open and close the on-off valve 6. As shown in FIG. 6, the eccentric cam 11 pushes the tip of the rocker arm 13C in the direction indicated by the arrow A. The rocker arm 13C is rotated to pull the link rod 13B. The opening / closing lever 13A is rotated to the solid line position by the link rod 13B. The opening / closing lever 13A pulls out the valve body of the opening / closing valve 6 to open the opening / closing valve 6. When the eccentric cam 11 rotates and the tip of the rocker arm 13C moves in the direction indicated by arrow B, the rocker arm 13C pushes the link rod 13B. The link rod 13B rotates the opening / closing lever 13A to the chain line position. The open / close lever 13A at the chain line position closes the valve body of the open / close valve 6. As described above, the rocker arm 13C is rotated by the eccentric cam 11, and the open / close valve 6 is opened / closed.

The outer shape of the eccentric cam 11 is designed so that the opening / closing valve 6 is opened when the ram 8 is retracted and is closed when the ram 8 is advanced. That is, when the ram 8 moves forward, the on-off valve 6 is closed, and when the ram 8 moves to the forefront, the on-off valve 6 is opened to inject the pressurized air in the cylinder 1 to fire the bullet, and then the ram 8 It is designed to open the on-off valve 6 and suck air into the cylinder 1 when retreating from.

The open / close valve 6 includes a lid member 14 for the cylinder 1.
It is configured with a valve body 6A inserted so as to be slidable in the axial direction. The lid member 14 is provided with an air discharge passage 15 and an air injection passage 16 in communication with the sliding hole of the valve body 6A. The air discharge path 15 and the air injection path 16 are provided so as to be vertically displaced from each other. Air exhaust path 15
Are connected to the inside of the cylinder 1, and the air injection passage 16 is connected to the nozzle 4. The air discharge path 15 is the air injection path 1
When connected to the nozzle 6, air is jetted from the nozzle 4 to fire a bullet. The valve body 6A is moved in the axial direction to connect the air discharge passage 15 to the air injection passage 16 or switch it to a non-connection state. The valve body 6A is provided with an air groove 19 having a width that moves in the axial direction and connects the air discharge path 15 and the air injection path 16. The air groove 19 is annularly provided in the valve body 6A. When the valve body 6A is pushed into the lid member 14,
The on-off valve 6 closes, and when the valve body 6A is pulled out from the lid member 14, the on-off valve 6 opens. FIG. 4 shows a state in which the opening / closing valve 6 is closed. As shown in this figure, when the valve body 6A is pushed in, the air groove 19 is connected to the air discharge passage 15, but not to the air injection passage 16. Therefore, the air discharge passage 15 is not connected to the air injection passage 16. Disc 6
When A is pulled out from the lid member 14, the air groove 19 communicates with the air discharge passage 15 and the air injection passage 16. In this state, the on-off valve 6 is opened, and the air in the cylinder 1 flows through the air discharge passage 15 → the air groove 19 of the valve body 6A → the air injection passage 16 → the nozzle 4 to fire the bullet.

The air injection passage 16 is connected to the nozzle 4 via a pipe 20. A groove is provided on the outer circumference of the pipe 20, and an O-ring is inserted in the groove to hermetically connect the nozzle 4. The nozzle 4 forcibly pushes the supplied bullet into the blocking ring 5 and is slidably connected to the pipe 20. The nozzle 4 is reciprocated in the axial direction in synchronization with the crankshaft 10. This is because the bullet is pushed into the blocking ring 5 before the on-off valve 6 is opened. The mechanism by which the nozzle 4 pushes the bullet into the blocking ring 5 is not shown. This mechanism can use the mechanism which is already used now. In order to reciprocate the nozzle 4 with a simple mechanism, the auxiliary crank shaft is fixed to the crank shaft 10 like the eccentric cam 11, and the auxiliary crank shaft is connected to the nozzle via a link. The auxiliary crank shaft is rotated together with the crank shaft to reciprocate the nozzle.

The motor 3 for rotating the crankshaft 10 and the eccentric cam 11 is connected to a battery via a main switch (not shown) which is turned on / off in conjunction with a trigger. When the trigger of the air toy gun is pulled and the main switch is turned on, the motor 3 is rotated and a bullet is fired. The motor 3 stops the crankshaft 10 and the eccentric cam 11 at the position where the crankpin is most retracted.
Therefore, it is provided with a sub switch (not shown) that is turned on and off by detecting the rotational position of the crankshaft 10. This sub switch is off when the crankshaft 10 is retracted,
It is turned on at other positions. The sub switch and the main switch are connected in parallel, and when any switch is turned on, the motor 3 is rotated.

The electric air toy gun of this structure fires a bullet by the following operation. The nozzle 4 retracts, and the bullet is supplied to the front of the nozzle 4 from the bullet guide. The nozzle 4 advances to guide the bullet to the blocking ring 5.
The nozzle 4 stands by in this state. The ram 8 advances with the on-off valve 6 closed. Ram 8
Causes the piston 2 to move forward via the spring 9 to compress the air in the cylinder 1. When the ram 8 moves to the tip, the open / close valve 6 is opened. When the opening / closing valve 6 is opened, the air in the cylinder 1 reaches the air injection passage 16 from the air discharge passage 15 and is ejected from the nozzle 4. The pressurized air jetted from the nozzle 4 is blocked by the blocking ring 5.
Fires the bullet held by. At this time, air is discharged from the cylinder 1, the spring 9 connecting the ram 8 and the piston 2 extends, and a larger amount of air is ejected from the nozzle 4 to efficiently accelerate the bullet and eject it from the barrel. The on-off valve 6 is opened, the ram 8 is retracted, and the piston 2 is retracted by the ram 8. At this time, the nozzle 4 also retracts and supplies the bullet forward. After that, as long as the trigger of the air toy gun continues to be pulled, the action of ~ is performed and the bullet is continuously fired.

Further, FIG. 7 shows an on-off valve 6 having another structure. This on-off valve 6 has a lever 21 at the upper end of the valve body 6A.
It has a structure that opens when pressed down. This valve body 6A
Has a collar at the lower end. An annular groove is provided on the outer periphery of the collar portion, and an O-ring 22 is fitted therein. O-ring 2
2 is pressed against the valve seat by the spring 23 and closed.
The spring 23 is arranged below the E-ring 24 at the upper end of the valve body and elastically pushes up the valve body 6A.

The valve body 6A of this structure comprises a lever 21, a rod 25 for rotating the lever 21, and an eccentric cam (not shown) for pressing the rod 25. The lever 21 has a lower surface at the right end as an inclined surface, and an inclined surface at the upper surface at the left end of the rod 25 is disposed on this inclined surface. When the rod 25 is pressed by the eccentric cam, the lever 21 is tilted in the direction indicated by the arrow A, and the lever 21 pushes the head of the valve body 6A to open the valve. When the rod 25 does not press the lever 21, the valve body 6A rises and the valve is closed.

[0031]

The electric air toy gun of the present invention has a feature that a motor can be used as a power source and an ammunition can be efficiently ejected at a high initial velocity without overloading the motor. This is because the crankshaft rotated by the motor does not directly drive the piston, but the crankshaft reciprocates the ram, and the ram and the piston are connected by a spring.
In this structure, since the ram pushes the piston through the spring, the spring is compressed when the ram is most advanced, and it is not necessary to push the piston forward most in this state. The compressed spring stores energy,
With the on-off valve opened, the piston expands and advances, and a large amount of pressurized air is supplied to the nozzle to eject the bullet efficiently at a high initial velocity. Therefore, the pneumatic toy gun of the present invention has a feature that the rotational torque of the crankshaft, especially the maximum rotational torque, is weakened, and a large amount of air is jetted to eject the bullet at a high initial velocity. Therefore, the electric air toy gun of the present invention can drive the motor with the battery and forcefully eject the bullet without using CFC gas, and prevent the motor from being burned and the fuse being blown. Further, it realizes a feature that the consumption of the battery is reduced and the number of times of use and the life of the battery can be extended.

[Brief description of drawings]

FIG. 1 is a sectional view showing an example of a conventional electric air toy gun.

2 is a sectional view showing the pneumatic toy gun of FIG. 1 with the piston retracted.

FIG. 3 is a schematic cross-sectional view showing a conventional air toy gun having another configuration.

FIG. 4 is a cross-sectional view showing an air injection unit of an electric air toy gun showing an embodiment of the present invention.

FIG. 5 is a side view showing a crankshaft and an eccentric cam.

FIG. 6 is a cross-sectional view showing a state where an eccentric cam opens and closes an on-off valve.

FIG. 7 is a sectional view showing an on-off valve according to another embodiment of the present invention.

[Explanation of reference numerals] 1 ... Cylinder 2 ... Piston 3 ... Motor 4 ... Nozzle 5 ... Blocking ring 6 ... Open / close valve 6A ... Valve body 7 ... Solenoid 8 ... Ram 9 ... Spring 10 ... Crankshaft 11 ... Eccentric cam 12 ... Connecting rod 13 ... Link 13A ... Opening / closing lever 13B ... Link rod 13C ... Rocker arm 14 ... Lid material 15 ... Air exhaust path 16 ... Air injection path 17 ... Gear 18 ... Small gear 19 ... Air groove 20 ... Pipe 21 ... Lever 22 ... O-ring 23 … Spring 24… E-ring 25… Rod

Claims (1)

[Claims] 1. A cylinder (1), a piston (2) reciprocating in the cylinder (1) to pressurize air, and a piston (2) connected to the piston (2) via a spring (9). )
Reciprocating ram (8) and ram (8) connecting rod (12)
Crankshaft (10) and cylinder (1) connected via
Driving the on-off valve (6) connected between the air discharge passage (15) and the nozzle (4) of the valve and the valve body (6A) of the on-off valve (6) in synchronization with the reciprocating motion of the ram (8). And a motor (3) for rotating the crankshaft (10) and driving the drive member.The motor (3) rotates the crankshaft (10), so that the crankshaft (10) rotates. The piston (2) is pushed into the cylinder (1) through the connecting rod (12), ram (8) and spring (9) to pressurize the air, and in this state the drive member opens and closes the valve.
An electrically driven air toy gun configured to open a valve (6) and eject pressurized air from a nozzle (4) to shoot a bullet.