JPH063091A - Hop-up device for bullet in toy rifle - Google Patents

Abstract

PURPOSE:To increase distance in a straight line and shooting range without increasing the rapidity of launching of a spherical bullet. CONSTITUTION:An opening 2 is formed at the upper part of a barrel for launching a spherical bullet B, where a frictional member 3 which can protrude into the barrel is disposed and a pressing member 4 for pressing the member 3 into the barrel from the outside is provided together with a friction adjusting mechanism 5. The bullet B having been launched makes contact with the member 4 on its way in the moving direction so as to be subjected to the frictional force corresponding to the degree of protusion of the member 4, so that the bullet B is launched from a muzzle of a rifle, while being rotated upwardly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toy gun, in which a hop-up of a bullet is performed by rotating the bullet to generate lift so that the straight range and the range are improved without increasing the speed of the bullet. It relates to an improvement of the device.

[0002]

2. Description of the Related Art Spherical bullets are commonly used in toy guns for firing bullets using compressed air or compressed gas such as carbon dioxide or freon gas. With that toy gun, since the bullet is fired by the compressed air flow ejected from the nozzle, the bullet does not rotate in any direction, and the range is determined by the momentum of the bullet. Controls the length.

To improve this point, Japanese Utility Model Laid-Open No. Sho 63-179
The inventions of No. 490 and No. 1-178489 were proposed. These are intended to extend the range by giving upward rotation to the bullet at the time of launch, generating lift that resists gravity fall.

In the former case of the above-mentioned prior application, a method of pushing a part of the rubber cylindrical body inward is applied to give rotation to the bullet. However, since both the part that is pushed in to give frictional resistance to the bullet and the inside of the cylindrical body that is pressed by the bullet on the opposite side to that part are made of rubber, there is little difference in frictional resistance between the upper and lower parts and the necessary rotation is given to the bullet. There is a problem that it is not possible to do it, the compressed air flow leaks from the pushing part of the rubber cylindrical body and power loss occurs, and since the pushing amount can not be finely adjusted, only bullets suitable for the inner diameter of the cylindrical body can be used. However, we cannot expect much improvement in performance.

In the latter case of the above-mentioned prior application, a part of the O-ring is installed so as to face the upper part of the gun cavity, and the passing bullet is given an upward rotation. However, since the bullet contacts the O-ring for a very short time, the O-ring must be strongly hit on the bullet to give the necessary rotation, which causes a large power loss in contact with the O-ring, and Further, the O-ring also has a drawback that it is severely worn.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and its object is to always add an optimum frictional resistance to the upper part of a spherical bullet so as to stabilize an almost constant upward rotation. At the same time to reduce the wear of the member to which the frictional resistance is applied and also to minimize the power loss.

[0007]

In order to solve the above-mentioned problems, the present invention provides an opening 2 communicating from the outside with the inside of the gun cavity 1 on the upper surface of the gun cavity 1 for firing a spherical bullet B. The outside of the opening 2 is covered with a friction member 3 made of an elastic material having a friction coefficient larger than that of the inner wall surface of the gun cavity, and a pressing member 4 elongated in the moving direction of the bullet B is arranged in the opening 2. By pushing the friction member 3 into the gun cavity through the pressing member 4, the upper portion of the bullet B can be rubbed over a required length, and the pressing member 4 is provided with a friction adjusting mechanism 5 for variably adjusting the degree of friction. That is the means.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A description will be given below with reference to the drawings. FIG. 1 (a),
As can be seen from the main part of the toy gun shown in (b), the toy gun of the embodiment is a so-called air gun that uses compressed gas.

The barrel 1 for firing a spherical bullet B has a barrel 10
And a rear end thereof is set to a projecting position 13 of the bullet B, and a cylinder 15 having a nozzle 14 is provided at the same position 13 from the rear so as to be movable back and forth. The cylinder 15 is biased by the spring 16 toward the firing position 13, and the handle 17
When it is slid backward, the bullet B is pushed up by the spring 19 from the loading opening 18 below the tip of the nozzle, so that the bullets B can be loaded one by one into the firing position.

Reference numeral 20 denotes a piston which slides in the cylinder, and 2
1 is a compression spring for rapidly sliding the piston 20 toward the nozzle 14, 22 is an engaging element at the rear end of the piston, which is pushed rearward by the rear end 23 of the cylinder, and engages with the engaging portion 25 of the trigger 24, It is placed in a standby state for firing (FIG. 1 (b)).

The firing position 13 and its rear nozzle 14 from the rear end of the barrel 10 are airtightly surrounded by a tubular member 26 having the above-mentioned loading slot 18.

An opening 2 communicating from the outside to the inside of the gun cavity is formed in a slender shape in the front and rear direction of the barrel on the upper surface of the gun cavity 1 near the firing position 13, and the end face 27 of the opening 2 is inclined so that the outside extends from the inside. Are provided (FIG. 2).

The opening 2 is covered with a friction member 3. The illustrated friction member 3 is formed in a cylindrical shape and covers the opening 2 and the area in front of and behind it. The friction member 3 is made of an elastic material having a friction coefficient larger than that of the inner wall surface 28 of the gun cavity below the opening 2 and can hermetically cover the opening 2 portion due to its own property.

A pressing member 4 is arranged outside the friction member 3 in order to push the friction member 3 into the gun cavity 1 through the opening 2. The pressing member 4 is formed in a slender shape in the front-rear direction like the opening 2, and is provided to push the friction member 3 into the gun cavity over a required length.

The pressing member 4 has, on the outer surface thereof, an inclined convex portion 6 having a high central portion in the longitudinal direction and a low front and rear, and an inclined portion which is in contact with the convex portion 6 and can press the pressing member 4 inward of the gun cavity. The pressing amount is adjusted by the cam member 8 having the surface 7 on the lower side. Convex part 6
The inclined surface 7 constitutes a friction adjusting mechanism 5 for the bullet by the friction member 3.

The illustrated friction adjusting mechanism 5 is provided with a holding cylinder 30 having a slide guide 29 inserted and held for sliding the rear portion of the cam member 8 at the upper portion. The holding cylinder 30 is fitted and attached to the barrel 10 from the outside of the friction member 3, and has a notch portion 31 in which the pressing member 4 is arranged at a position overlapping the opening 2.

The cam member 8 is provided with a tubular drive member 33 extending forward and having a rack 32 in the front-rear direction at the tip thereof. The member 33 is fitted in the barrel 10 so as to be movable back and forth, and the rack 32 is provided.
It is moved in the front-rear direction of the barrel by operating the handle 9 having the teeth 34 meshing with each other. The handle 9 is pivotally supported on the fixed side such as the casing 35.

Therefore, when the convex portion 6 and the inclined surface 7 shown in FIG. 4A are engaged, the pressing member 4 is pushed by the elastic force of the friction member 3 and moves away from the bullet B. When is pushed inward by the inclined surface 7, the upper inner surface 36 of the friction member 3 contacts the upper surface of the bullet B (FIG. 4).
(B)).

The friction adjusting mechanism 5 can be simplified as shown in FIG. The modification of FIG. 5 is a friction adjusting mechanism 5 that uses a second cam member 12 having an eccentric cam surface 11 that is rotatable in contact with the outer surface of the pressing member 4, and the outer surface of the pressing member 4 may be flat.

In the case of this modification, when the shaft 37 of the second cam member 12 is rotated by operating a handle (not shown), the pressing member 4 is moved into the cavity by an amount corresponding to a change in the distance between the eccentric cam surface 11 and the shaft 37. Since it is pushed in, friction can be applied to the upper surface of the bullet B as in the case of the above embodiment.

A toy gun having a bullet hop-up device having such a configuration can operate the cylinder handle 17 to bring the piston 20 into a pressure-accumulating state and at the same time to send the bullet B to the firing position 13 and the trigger 24. When operated to increase the pressure in the cylinder to a predetermined pressure, the elastic force B can be emitted.

At this time, as shown in FIG. 4A, the friction member 3
As long as the bullet B does not project into the gun cavity, the bullet B is fired from the muzzle 38 without rotating as usual. However, when the upper surface of the bullet B contacts the friction member 3 as shown in FIG. The difference in friction between the inner wall surface 28 and the upper inner surface 36 of the friction member 3 is given a clockwise rotation in the drawing to be fired.

That is, when the friction adjusting mechanism 5 is operated, the pressing member 4 pushes the friction member 3 depending on the degree to which the inclined surface 7 pushes the convex portion 6 or the degree to which the cam surface 11 projects, and the upper inner surface 3 thereof.
6 slenderly projects into the gun cavity 1. Therefore, while passing through the portion, the bullet B is given a clockwise rotation in the drawing as described above with a strength corresponding to the degree of protrusion of the upper inner surface 36. Therefore, the degree of spin on the bullet B can be adjusted by operating the friction adjusting mechanism 5.

At this time, since the upper inner surface 36 of the friction member 3 which is in contact with the bullet B is formed to be elongated in the moving direction of the bullet B, it is necessary to impart the rotation to the breaking circle B while moving within the range of the upper inner surface 36. Therefore, necessary and sufficient rotation can be given without strong friction.

That is, since friction is applied over a certain length in the moving direction of the bullet B, it is not necessary to make strong contact with the bullet B, resulting in less power loss and less wear on the friction member 3 side. Moreover, the required rotation can be given even if the bullet B has a variation in diameter, and the amount of this rotation can be finely adjusted by operating the friction adjusting mechanism 5.

[0026]

According to the present invention, therefore, it is possible to always add an optimum frictional resistance to the upper part of the spherical bullet B to give an almost constant upward rotation, so that the bullet B is raised upward by excessive upward rotation. It is possible to increase the straight-line distance and the range without increasing the bullet velocity without causing warping or insufficient effect due to insufficient rotation.

In particular, according to the present invention, the friction member 3 applies frictional resistance in the moving direction of the bullet B over a certain length to give rotation, so that power loss is reduced and wear of the friction member 3 is reduced. The required rotation can be provided despite the diameter variation that is typical of this type of bullet. It is obvious that the present invention can be applied to toy guns other than air guns.

[Brief description of drawings]

FIG. 1A is a plan view of a main part of a toy gun according to an embodiment of the present invention. (B) Vertical sectional view of the above.

FIG. 2 is an exploded perspective view of an apparatus according to an embodiment of the present invention.

FIG. 3 is a plan view of the same device.

4 (a) is a sectional view taken along line IV-IV of FIG. FIG. 4B is a sectional view similar to FIG. 4A showing the operating state.

FIG. 5 is a vertical cross-sectional view showing a modified example of the friction adjusting mechanism.

Claims (4)

[Claims] 1. An elastic material having an opening 2 communicating from the outside to the inside of the gun cavity, which has a larger friction coefficient than the inner wall surface of the gun cavity below the opening 2. Covering the outside of the opening 2 with a friction member 3
By arranging a pressing member 4 elongated in the moving direction of the bullet B in the opening 2 and pressing the friction member 3 into the gun cavity through the pressing member 4, the upper part of the bullet B can be rubbed over a required length. In addition, the hop-up device for a bullet in a toy gun is characterized in that the pressing member 4 is provided with a friction adjusting mechanism 5 for variably adjusting the degree of friction. 2. The friction adjusting mechanism 5 is capable of pressing the pressing member 4 inwardly of the opening 2 in contact with the convex portion 6 provided on the outer surface of the pressing member 4 so as to project outward. The bullet hop-up device for a toy gun according to claim 1, comprising a cam member (8) having an inclined surface (7) and a handle (9) provided for moving the cam member (8) toward the inclined surface (7). 3. The friction adjusting mechanism 5 has a second cam surface 11 which rotates in contact with the outer surface of the pressing member 4 and can be pressed inward.
The bullet hop-up device for a toy gun according to claim 1, further comprising a cam member (12). 4. The hop-up device for a toy gun according to claim 1, wherein the friction member 3 has a structure in which the opening 2 is closed from the outside to prevent gas from leaking.