KR101802040B1

KR101802040B1 - Bullet

Info

Publication number: KR101802040B1
Application number: KR1020150191017A
Authority: KR
Inventors: 임채진
Original assignee: 임채진
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2017-11-27
Also published as: KR20170079936A; WO2017116058A1

Abstract

The present invention relates to a bullet which is emitted from a firearm and is related to a bullet which increases the stability of flight and increases the straightness and the range of the bullet. In the embodiment, the bullet has a body formed with a center hole passing through the front and rear in accordance with the advancing direction, And a plurality of wings which are arranged at an equal angle with respect to the center of the cross section and which are bent in one direction with respect to the center of the cross section of the body.

Description

Bullet {Bullet}

The present invention relates to a bullet launched from a firearm, and relates to a bullet which increases flight stability and increases straightness and range.

Bullets have been improved with the aim of improving accuracy, improving destructive power, and improving range with the development of firearms. The bullets fly on the basis of the explosive force of the charge, and the range is affected by the initial velocity of the bullet, the launch angle, and the air resistance depending on the shape of the warhead. Particularly, the region with low air density due to turbulence, which is formed behind the bullet which is flying rapidly, is one of the main factors that hinders the progress of the bullet.

The initial firearm used a gilded inner surface of the barrel, and a steel wire was developed with a helical groove to give rotation to the bullet. A bullet that is rotated by a steel wire rotates rapidly, and its destructive power and range are improved by advancing.

For the purpose of improving the performance of the warhead, Korean Patent Laid-Open No. 10-2009-0087160 proposes a warhead having a hole opened front and rear at the center of the warhead. In this conventional technique, it is explained that the air flowing through the hole formed by the polygonal cross section suppresses the rotation of the warhead and the rotation of the warhead is suppressed.

Korean Patent Publication No. 10-2009-0087160 (2009.08.17)

The present invention intends to positively induce the rotation of the fired bullet, and improve the bullet flight stability and the bullet performance including the range.

Other objects and advantages of the present invention will become apparent to those skilled in the art from the following detailed description.

According to an embodiment of the present invention, there is provided a body having a center hole passing through the front and rear in accordance with a forward direction, A bullet including a plurality of wings bent in one direction as a reference is presented.

At this time, the center hole may have a shape in which the sectional area gradually decreases toward the rear of the body.

On the other hand, the bent angle of the wing portion may be set to 5 to 10 degrees with respect to the imaginary line passing through the center of the center hole.

In addition, a circular rim may protrude from the rear end of the body.

In addition, the outer circumferential surface of the body may have a curved shape a plurality of times along the longitudinal direction of the body.

Also, a piece of debris for scattering, a primer, and a charge can be provided inside the hollow of the body to be used as a shell.

According to the embodiment of the present invention, it is possible to maintain the high speed of the bullet by reducing the cavity formed at the rear end of the bullet which is fired, to improve the straightness of the bullet, and to improve the destructive power and range. In addition, the wing portion provides rotational force to the flying bullet, which contributes to increasing the destructive power and increasing the range by the rotation of the bullet. It also contributes to the improvement of accuracy of flight by securing flight stability by rim.

The effects of the present invention will be clearly understood and understood by those skilled in the art, either through the specific details described below, or during the course of practicing the present invention.

1 is a schematic perspective view of a bullet according to an embodiment of the present invention;
Figure 2 is a perspective view of a portion of a bullet according to the embodiment shown in Figure 1;
3 is a plan view of the embodiment shown in Fig.
Figure 4 is a front view of the assembly of the bullet and shell shown in Figure 1;
5 is a front view schematically illustrating a bullet according to another embodiment of the present invention.
6 is a schematic cross-sectional view of a bullet according to another embodiment of the present invention.
7 is a schematic cross-sectional view of a bullet according to another embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the configuration, function, and operation of a bullet according to the present invention will be described with reference to the accompanying drawings. It should be noted, however, that the drawing numbers for the same or similar components throughout the drawings and embodiments shall be used collectively.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, therefore, are not to be construed as limiting the technical spirit of the invention. It is to be understood that the invention is not to be limited by any of the details of the description to those skilled in the art from the standpoint of a person skilled in the art that any or all of the drawings shown in the drawings are not necessarily the shape,

1 to 4 relate to bullets according to embodiments of the present invention. In Fig. 1, the bullet is in a standing state, and the direction indicated by the block arrow is the advancing direction of the bullet fired. In describing the direction afterward, the front end facing the advancing direction is forward.

The bullet 100 according to the embodiment of the present invention includes a body 10 having a center hole 11 and a plurality of wings 20 formed at an equal angle with respect to the center of the cross section in the center hole.

The body 10 has a circular cross section and is substantially cylindrical. A pair of gas checkers 12 protrude forward and rearward around the outer circumferential surface of the body 10. The gas checker 12 prevents the combustion gas of the charge from leaking to the gun barrel and the bullet during the process of being pushed out of the barrel, and reduces the friction with the inner circumferential surface of the barrel.

However, according to the embodiment, the gas checker 12 may be formed in different positions or in different numbers. Furthermore, the gas checker 12 may be omitted.

In another embodiment shown in Fig. 6, the outer peripheral surface 10b of the body 10 has a plurality of bends and corrugated shapes along the longitudinal direction of the bullet. The bending has a gentle curvature, and the maximum diameter of the body 10 due to bending corresponds to the outer diameter size of the gas checker described above. Therefore, the curvature formed on the outer peripheral surface 10b of the body 10 can function as a gas checker.

The curvature of the outer circumferential surface 10b of the body 10 may protrude at least at two points for stable support in the barrel and protrude at three or more points as shown in the figure when the bullet is sufficiently long.

The outer peripheral surface 10b of the wrinkled body 10 is obtained by removing the angled portion from the bullet 100 of the above-described embodiment, thereby further reducing the air resistance, thereby improving the flight characteristics of the bullet.

On the other hand, the rear half of the body 10 is formed by an inclined surface 13 whose outer diameter gradually decreases. A circular rim 14 protrudes from the end of the inclined surface 13, that is, the rear end of the body. The diameter of the rim 14 may be equal to or slightly less than the diameter of the gas checker 12.

The central hole (11) is formed through the front and rear of the body (10) according to the forward direction of the bullet. Air is passed through the central hole 11 during the course of the bullet 100 advancing.

2, a toroidal tip portion 10a between the outer peripheral surface of the body 10 and the entrance of the central hole 11, that is, the bullet-shaped tip portion 10a, protrudes forward and forms a convex curved surface.

Accordingly, the air that is encountered according to the advancing flight of the bullet 100 flows into the center hole 11 on the trumpet-shaped curved surface in front of the entrance of the center hole. Also, the air resistance of the front surface of the bullet protruding from the tip end 10a is reduced.

As shown in Fig. 2, the central hole 11 can have a shape in which its inner diameter is equal to the front and rear, or the cross-sectional area becomes gradually narrower toward the rear of the bullet 100 as in the other embodiments shown in Fig. 5 .

The wings 20 are formed to extend from the inner wall of the center hole 11 and are arranged on a plurality of isosceles planes with respect to the center of the cross section of the center hole 11. [ The wing portion 20 is bent in one direction along the front-rear direction with respect to the center of the cross-section of the body. The bent wing portion 20 can change the flow of the air passing through the center hole 11 into a vortex in the same manner as the blades of the fan.

1 and 3, the embodiment shows that three wing portions 20 are provided. The number of wing portions may be changed in other embodiments.

Furthermore, one end portion 20a of the wing portion 20 facing the advancing direction of the bullet can be formed as a curved surface by projecting toward the front. The air resistance of the blade portion 20, which collides with the incoming air, can be reduced by forming the convex curved surface of the forward-facing end portion 20a.

In another embodiment, not shown, for the purpose of reducing air resistance, the end of the forward facing wing portion can be formed in a sharpened manner.

Fig. 4 shows the combination of the bullet 100 and the shell 40. Fig. A blocking plate 30 for blocking the central hole 11 is coupled to the rear end of the bullet 100 and the bullet 100 is housed in the shell 40 together with the blocking plate 30. The barrier plate (30) is made of a metal plate or the like which is softer than the bullet (100). The blocking plate 30 allows the explosive force of the charge to completely push the bullet 100 and separates the bullet 100 from the bullet by the pressure of the air flowing into the center hole after the bullet 100 is removed from the barrel.

Hereinafter, the operation of the bullets according to the embodiment of the present invention will be described with reference to the drawings.

Air is introduced through the center hole 11 during the flight of the fired bullet 100. The introduced air passes through the wing portion 20 bent in one direction and forms a vortex at the back of the bullet 100, and then exits. The air pressure gradient formed in the wing 20 during vortex formation serves to rotate the bullet 100.

When the bullet 100 is fired using a barrel without a steel wire such as a musical instrument, the bullet does not rotate immediately after firing, but the rotational force generated by the wing 20 rotates the body 10, The rotation starts and the rotational speed of the bullet gradually increases while flying a considerable distance. As the bullet 100 which has not been rotated immediately after being fired is rotated during the flight, the direction stability is secured and the straightness is improved, thereby improving the accuracy and range.

Meanwhile, when the bullet is fired using the barrel in which the steel wire is formed, the rotational force of the bullet portion 20 is added to the rotational force of the bullet 100 that rapidly rotates due to the influence of the steel wire, So that the flight performance of the bullet can be improved and the destructive force at the target point can be improved due to the torque that is maintained for a long period of time.

The air that has passed through the center hole 11 and escapes to the tail of the bullet has a vortex according to the shape of the wing 20 and has the effect of reducing the low pressure space formed at the back of the bullet according to the prior art.

The bullet according to the prior art has a truncated rear end. Since the air passing through the bullet circumferences does not converge during the flight of the bullet at high speed flight, a space in which the air is lean (close to the vacuum) is formed at the rear end of the bullet, a large drag is generated, and the bullet speed is greatly reduced.

In the embodiment of the present invention, the air escaping through the center hole 11 actively blows air to the staggered tail of the bullet 100, thereby greatly reducing the generation of drag. Particularly, the air sent to the tail of the bullet by the vortex flow rapidly reduces the generation of drag as the space behind the bullet 100 is filled. It can slow down the speed of the bullet as much as the reduced drag, which greatly improves the range.

The bent angle of the wing portion 20 can be set to 5 to 10 degrees with respect to the imaginary line L passing through the center of the center hole 11 (see FIG. 5).

When the bent angle A of the wing portion 20 is less than 5 degrees with respect to the imaginary line L passing through the center of the center hole, the air resistance due to the wing portion rather than the rotational force of the bullet, It has a greater influence on the flight characteristics of the bullet, and the effect of the speed improvement due to the rotation of the bullet begins to be hindered.

On the other hand, when the warped angle A exceeds 10 DEG with respect to the imaginary line, the accuracy of the bullet starts to decrease significantly.

The forming angle of the wing portion for optimizing the bent angle A of the wing portion 20 may vary depending on the specifications of the firearm to which the bullet is fired. The standard of the steel wire, the length of the barrel, Can be considered.

In FIG. 5, the center hole 11 has a shape in which the cross-sectional area becomes gradually narrower toward the rear, so that the speed of the air escaping to the rear of the center hole 11 can be further increased. In this case, the cavity formed at the tail of the bullet can be more effectively reduced.

On the other hand, the rear cross-sectional area of the bullet 100, which is widely secured by the rim 14, can transmit the propulsive force due to the charge explosion to the bullet. The rim 14 also stabilizes the motion of the bullet 100 during the passage through the barrel. Also, the rim 14 can reduce the waving motion of the bullet while the air converging along the slope 13 on the rear side of the body during the flight of the fired bullet 100 hits the rim and spreads.

On the other hand, when the target bullet is hit, the bullet formed with the center hole 11 can expand the bullet like the halo point, thereby maximizing the destructive force.

In addition, various technical matters added to the operation of the bullet in the prior art such as coating magnesium at the end of the warhead can be applied to the bullet according to the embodiment of the present invention.

For example, in the embodiment shown in FIGS. 6 and 7, the tip end 10a of the bullet 100 is made of a metal material stronger than the body material. For example, the body may be made of steel, and the tip may be a heat-treated steel alloy, a tungsten alloy, or the like.

Figure 7, on the other hand, shows an embodiment used as a shell.

In the illustrated embodiment, the configuration of the body 10 and the wing portion 20 can be adopted in any of the above-described embodiments.

When the bullet 100 is used as a shell, the inside of the body 10 is empty, and the body 10 is formed of a metal shell. A debris fragment T for scattering, a primer D, and a charge P are provided in the interior of the body 10. After reaching the target, the primer (D) is activated by the impact and the charge (P) explodes, so that not only the body but also the fragments (T) are scattered in all directions.

The filling material filled in the hollow of the body may be variously changed in addition to fragments of debris, such as combustion fuel, high explosive powder.

100: the bullet
10: body 10a: distal end 10b:
11: center hole 12: gas checker 13: slope 14: rim
20: wing portion 20a: end portion
L: imaginary line 30: blocking plate 40:
T: fragment piece D: primer P: charge

Claims

A body formed with a central hole passing through the front and rear in accordance with the advancing direction,
And a plurality of wings which are arranged at an equal angle with respect to a center of a cross section of the center hole and are bent in one direction with respect to a center of the cross section of the body,
Wherein the center hole is formed so that a cross-sectional area of the center hole decreases gradually toward the rear of the body,
And a circular rim protrudes from the rear end of the body.

delete

The method of claim 1,
Wherein the warping angle of the wing portion is 5 [deg.] To 10 [deg.] With respect to an imaginary line passing through the center of the center hole.

delete

The method of claim 1,
The outer peripheral surface of the body
Wherein the bulb is bent a plurality of times along the longitudinal direction of the body.

The method of claim 1,
Inside the hollow of the body,
A shatter fragment piece for scattering, a primer, and a charge.