Bullets including a projectile blade

Abstract

The projectile according to the present invention has the feature of being able to easily cut the slope groove through a projectile blade inserted into the slope groove, and improving straightness when the projectile (300) enters the water.

Description

Technology Field

[0001] The present invention relates to a projectile comprising a projectile blade. Background Technology

[0003] A bullet loaded into and fired from a projectile such as a rifle consists of gunpowder that generates firing energy through an explosion and a warhead that flies toward a target driven by this firing energy. Generally, when manufacturing such a warhead, a bullet casing made of copper alloy is first formed into a conical shape with an internal space through mechanical processing such as forging, and then molten metal, such as lead, is injected into this internal space of the casing using a nozzle.

[0004] In conventional methods of manufacturing warheads by injecting molten metal into the casing, it is difficult to accurately manufacture the nozzle for injecting the molten metal, and it is also difficult to finely and precisely control the molten metal. Furthermore, molten metal such as lead injected into the casing often fails to solidify to a uniform density, which causes the warhead's center of gravity to become unbalanced, resulting in a failure to form a solid impact cluster upon reaching the target.

[0005] In addition, since lead, which has a higher specific gravity than copper alloy, is injected into the interior of the bullet casing, the center of gravity of the bullet shifts toward the rear. This causes the precession to increase while the bullet flies through the air, resulting in a problem where the accuracy (hit rate) of the bullet decreases.

[0006] Meanwhile, a warhead is used in which a groove is formed on the outer surface of the warhead and a deeply recessed groove is formed on the rear surface of the warhead so that ammunition is filled inside the groove, thereby increasing the effective range and improving accuracy by reducing the resistance of the warhead in the air while the warhead is flying. In this warhead, the effective range is increased and accuracy is improved through the action of the groove formed on the outer surface of the warhead and the groove formed on the rear surface of the warhead during flight in the air.

[0007] However, when a warhead with the above-mentioned structure is used for underwater firing, the deep groove formed on the rear of the warhead creates excessive vortices, which increases penetration power underwater but significantly reduces accuracy, making it difficult to use for underwater firing.

[0008] Furthermore, in warheads filled with soft metals such as lead, the explosive force of the ammunition instantaneously compresses the lead and causes it to expand toward the casing. While this expansion increases contact between the barrel and the warhead, thereby extending the effective range, using a warhead with this structure for underwater firing results in a drastic decrease in accuracy. This is because the increased water pressure applied to the front of the warhead causes the casing to contract, pushing the lead inside toward the rear of the warhead and altering its shape.

[0009] There is a need to develop a warhead capable of enhancing flight stability and destructive power in air and underwater while maintaining structural reliability. Prior art literature

[0011] Republic of Korea Registered Patent No. 10-1527434, U.S. Patent Publication US 4726298, Republic of Korea Registered Patent No. 10-1568319 The problem to be solved

[0012] The present invention was devised to solve the aforementioned conventional problems and aims to provide a warhead with improved flight stability and destructive power. means of solving the problem

[0014] The present invention provides a projectile comprising: a projectile housing (201) having a projectile opening (205) formed toward the cartridge case (150); a projectile (300) disposed inside the projectile housing (201); and a closure (260) assembled to the projectile housing (201) to close the projectile opening (205); and a cavitator (270) formed therein that, during flight, artificially generates bubbles at the tip to artificially create a supercavitation phenomenon in which the outer surface of the projectile housing (201) is wrapped in bubbles.

[0015] The above-mentioned projectile housing (201) may include a first projectile housing (210) positioned at the tip of the flight direction, a second projectile housing (220) connected to the first projectile housing (210), a third projectile housing (230) connected to the second projectile housing (220), and a fourth projectile housing (240) connected to the third projectile housing (230) and having the projectile opening (205) formed in the direction of the cartridge case (150).

[0016] The above cavitator (270) may include a first cavitation groove (271) disposed in the first projectile housing (210), a second cavitation groove (272) disposed in the second projectile housing (220), and a third cavitation groove (273) disposed in the fourth projectile housing (240).

[0017] The above cartridge case (150) can be bent into the third cavitation groove (273) and combined with the bullet housing (201). Effects of the invention

[0019] First, the present invention has the advantage of artificially generating bubbles at the tip during flight to artificially induce a supercavitation phenomenon in which the outer surface of the projectile housing is wrapped in bubbles, thereby improving the effective range, flight stability, and destructive power of the projectile.

[0020] Second, the projectile according to the present invention has the advantage of improving productivity through a closure and obtaining sufficient thrust through the explosive force of the propellant charge.

[0021] Third, the present invention is characterized in that the closure supports the projectile, thereby blocking the projectile from moving axially within the projectile housing.

[0022] Fourth, the projectile according to the present invention has the advantage of being able to maintain straight-line stability underwater by minimizing drag and suppressing turbulence, and maintaining a speed that is lower than the speed of flight in air but significantly higher than the flight speed of a conventional bullet.

[0023] Fifth, since the first closure groove of the present invention is formed as a groove with a shape corresponding to the projectile support part, it is possible to suppress the projectile support part from deviating from the axis center (S) during the manufacture of the projectile, and thereby improves assembly precision, which has the advantage of improving flight stability and destructive power.

[0024] Sixth, the present invention has the advantage that, since the front side of the projectile is fitted and fixed to the 3-1 projectile housing part and the rear end is supported by the closure, the axis center of the projectile can be precisely positioned at the axis center (S) of the projectile housing during the assembly of the projectile and the projectile housing, thereby improving flight stability. Brief explanation of the drawing

[0026] FIG. 1 is a perspective view of a projectile according to a first embodiment of the present invention. Figure 2 is a cross-sectional view of the projectile shown in Figure 1. FIG. 3 is a cross-sectional view of a bullet according to the first embodiment of the present invention. Figure 4 is a partial enlarged view of Figure 2. Figure 5 is a cross-sectional view cut along DD of Figure 2. FIG. 6 is a cross-sectional view of a projectile according to a second embodiment of the present invention. Specific details for implementing the invention

[0027] The present invention is susceptible to various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. Similar reference numerals have been used for similar components in the description of each drawing.

[0028] Terms such as first, second, A, B, etc., may be used to describe various components, but said components shall not be limited by said terms. These terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" includes a combination of a plurality of related described items or any of a plurality of related described items.

[0029] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0030] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, terms such as "comprising" or "having" are intended to specify the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0031] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0032] In this document, "configured to" may be used interchangeably with, depending on the context, for example, in hardware or software, "suitable for," "capable of," "modified to," "made to," "capable of," or "designed to." In some situations, the expression "device configured to" may mean that the device is "capable of" doing something together with other devices or components.

[0033] Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding of the present invention, the same reference numerals are used for identical components in the drawings, and redundant descriptions of identical components are omitted.

[0034] FIG. 1 is a perspective view of a bullet according to a first embodiment of the present invention, FIG. 2 is a front cross-sectional view of the bullet shown in FIG. 1, FIG. 3 is a cross-sectional view of a bullet according to a first embodiment of the present invention, FIG. 4 is a partial enlarged view of FIG. 2, and FIG. 5 is a cross-sectional view cut along DD of FIG. 2.

[0035] The bullet according to the present embodiment comprises a cartridge case (150) having a cartridge case opening (150a) formed on one side, a projectile (200) assembled to the cartridge case (150) to close the cartridge case opening (150a), a propellant charge (120) stored inside the cartridge case (150), and a primer (110) disposed on the other side of the cartridge case (150).

[0036] The above-mentioned bullet (200) includes a bullet housing (201) in which the side of the cartridge case (150) is open to form a bullet opening (205), a projectile (300) disposed inside the bullet housing (201), and a closure (260) assembled to the bullet housing (201) to close the bullet opening (205).

[0037] The above-mentioned bullet housing (201) is formed of an alloy material containing copper.

[0038] The projectile (200) according to the present embodiment has the characteristic of artificially generating bubbles at the tip during flight to artificially generate a super cavitation phenomenon in which the outer surface of the projectile housing (201) is wrapped in bubbles, thereby improving the effective range, flight stability, and destructive power of the projectile.

[0039] In this embodiment, the structure for forming the supercavity is defined as a cavitator.

[0040] The projectile (200) according to the present embodiment has the characteristic of improving productivity through the closure (260) and obtaining sufficient thrust through the explosive force of the propellant (120).

[0041] In this embodiment, the supercavitation phenomenon that can induce a supercavitation phenomenon in the ballistic housing (201) is a phenomenon in which a very large bubble (vapor cavity, cavity) is formed around an object moving at high speed through water, causing the object to travel most of its length inside the bubble.

[0042] General cavitation is a phenomenon in which a liquid vaporizes locally due to a pressure drop, creating small bubbles, whereas supercavitation involves bubbles enveloping the entire projectile, significantly reducing the surface area of ​​the projectile in direct contact with water, thereby drastically reducing drag.

[0043] The above-mentioned projectile housing (201) includes a first projectile housing (210) positioned at the leading edge of the flight direction, a second projectile housing (220) connected to the first projectile housing (210), a third projectile housing (230) connected to the second projectile housing (220), and a fourth projectile housing (240) connected to the third projectile housing (230) and having a projectile opening (205) formed in the direction of the cartridge case (150).

[0044] A projectile housing space (202) is formed inside the projectile housing (201).

[0045] The closure (260) is placed in the above-mentioned projectile opening (205), and the fourth projectile housing (240) is bent and then pressed into the closure (260) to be fixed with the closure (260).

[0046] The above-mentioned projectile housing (201) is formed in an overall conical shape, and a virtual axis center (S) is formed. The above-mentioned projectile housing (201) is formed in a rotating body shape based on the axis center (S).

[0047] The first projectile housing (210) is formed as a pointed cone toward the flight direction, and a vertex is formed at the projectile tip (215).

[0048] The first projectile housing (210) includes a first-1 projectile housing part (211) that extends from a projectile tip (215) formed on the flight direction side toward the flight opposite direction side and is formed at an angle away from the axis center (S), and a first-2 projectile housing part (212) that is bent toward the axis center (S) from the end of the first-1 projectile housing part (211) opposite the flight direction side.

[0049] The above-mentioned first-1 bullet housing part (211) forms an inclined line of a cone.

[0050] A first angle (A) is formed with the first-1 projectile housing part (211) as both sides. In this embodiment, the first angle (A) is the apex angle of the first projectile housing (210). The first angle (A) can be formed to be greater than 120 degrees and less than 180 degrees.

[0051] The above first-2 projectile housing part (212) is connected to the above second projectile housing (220).

[0052] The second projectile housing (220) is connected to the first-second projectile housing part (212) by being bent, and includes a second-first projectile housing part (221) that is extended toward the direction opposite to flight and formed at an angle away from the axis center (S), and a second-second projectile housing part (222) that is bent toward the axis center (S) at the end of the second-first projectile housing part (221) opposite to the flight direction.

[0053] The second projectile housing (220) is formed in the shape of a truncated cone.

[0054] The above 2-1 bullet housing part (221) forms the generatrix of the truncated cone.

[0055] A second angle (B) is formed with the above-mentioned second-1 bullet housing part (221) as both main lines.

[0056] The second angle between (B) is formed to be smaller than the first angle between (A).

[0057] The third projectile housing (230) is connected to the second-2 projectile housing part (222) by being bent and includes a third-1 projectile housing part (231) that is formed at an angle away from the axis center (S) and extends toward the direction opposite to flight, and a third-2 projectile housing part (232) that is bent toward the axis center (S) at the end opposite to the flight direction of the third-1 projectile housing part (231).

[0058] The third projectile housing (230) is formed in the shape of a truncated cone.

[0059] The above 3-1 bullet housing part (231) forms the truncated cone line.

[0060] A third angle (C) is formed with the above-mentioned third-1 projectile housing part (221) as both main lines.

[0061] The first angle between (A) is formed to be the largest, and the third angle between (C) is formed to be the smallest. The third angle between (C) can be formed to be 30 degrees or more and less than 40 degrees.

[0062] The third angle (C) is formed to be smaller than the second angle (B).

[0063] The above-mentioned fourth projectile housing (240) is formed with an overall cylindrical shape.

[0064] The above-mentioned fourth projectile housing (240) is connected to the above-mentioned third-second projectile housing part (232) and includes a fourth-first projectile housing part (241) extended toward the direction opposite to the flight direction, a fourth-second projectile housing part (242) bent toward the axis center (S) at the end opposite to the flight direction of the fourth-first projectile housing part (241), a fourth-third projectile housing part (243) bent toward the direction away from the axis center (S) at the end opposite to the flight direction of the fourth-second projectile housing part (242), and a fourth-fourth projectile housing part (244) extended toward the direction opposite to the flight direction at the end opposite to the flight direction of the fourth-third projectile housing part (243).

[0065] The above 4-1 projectile housing part (241) and 4-4 projectile housing part (244) can form a continuous curved surface. The above 4-1 projectile housing part (241) and 4-4 projectile housing part (244) can be formed in a cylindrical shape.

[0066] The above 4-2 projectile housing part (242) and 4-3 projectile housing part (243) form a concave groove toward the axis center (S).

[0067] The above 4-2 projectile housing part (242) is formed to be shorter than the above 4-3 projectile housing part (243). The bending angle of the above 4-1 projectile housing part (241) and the 4-2 projectile housing part (242) is formed to be smaller than the bending angle of the above 4-3 projectile housing part (243) and the 4-4 projectile housing part (244).

[0068] The projectile opening (205) is formed on the inner side of the end opposite the flight direction of the above-mentioned 4-4 projectile housing part (244).

[0069] The above-mentioned fourth projectile housing (240) may further include a fourth-fifth projectile housing part (245) that is bent in a direction approaching the axis center (S) at the end opposite the flight direction of the above-mentioned fourth-third projectile housing part (243) and pressed into the closure (260).

[0070] The above-mentioned projectile housing (201) further includes a first cavitation groove (271) formed on the radially outer side of the first-2 projectile housing part (212) and the second-1 projectile housing part (221), a second cavitation groove (272) formed on the radially outer side of the second-2 projectile housing part (222) and the third-1 projectile housing part (231), and a third cavitation groove (273) formed on the radially outer side of the fourth-2 projectile housing part (242) and the fourth-3 projectile housing part (243).

[0071] The first cavitation groove (271), the second cavitation groove (272), and the third cavitation groove (273) are referred to as cavitators (270). The first cavitation groove (271), the second cavitation groove (272), and the third cavitation groove (273) are formed concavely in the direction of the axis center (S).

[0072] The closure (260) is formed in a disc shape overall. In this embodiment, the closure (260) supports the projectile (300) and is characterized by blocking the projectile (300) from moving axially inside the projectile housing (201).

[0073] The above closure (260) comprises a closure body (265), a first closure groove (261) formed concavely on the side of the closure body (265) in the direction opposite to the flight direction and supporting the projectile (300), a second closure groove (262) formed concavely on the side of the closure body (265) in the direction opposite to the flight direction and accommodating the explosive force of the propellant (120), and a closure fixing groove (263) formed concavely on the outer surface of the closure body (265) in the direction of the axis center (S) and into which the fourth projectile housing (240) is pressed and fixed.

[0074] In this embodiment, the first closure groove (261) is formed in a concave cone shape opposite to the flight direction, and the apex angle is positioned at the axis center (S).

[0075] The second closure groove (262) is formed as a part of a spherical shape that is concave toward the flight direction.

[0076] The above projectile (300) is formed of a material with a higher hardness than the projectile housing (210).

[0077] The above projectile (300) may be formed of a manganese-molybdenum alloy or a tungsten alloy, and upon external impact, it may be fired in the direction of flight of the projectile while tearing through the projectile housing (201).

[0078] Specifically, when the above bullet (200) enters the water from the air, the projectile (300) may enter the water while tearing through the bullet housing (210) due to the impact applied to the above bullet housing (210).

[0079] The above projectile (300) is manufactured with a shape that has high underwater straightness.

[0080] The above projectile (300) has the characteristic of being able to maintain straight-line stability underwater by minimizing drag and suppressing the generation of turbulence, and can maintain a speed that is lower than the speed of flight in air but significantly higher than the flight speed of a typical bullet.

[0081] The above projectile (300) includes a first projectile part (310) having a pointed projectile tip (315) formed in the flight direction, a second projectile part (320) extending from the first projectile part (310) in the opposite direction of flight, a third projectile part (330) extending from the second projectile part (320) in the opposite direction of flight, and a fourth projectile part (340) extending from the third projectile part (330) in the opposite direction of flight.

[0082] The first projectile part (310) is formed in a conical shape. The second projectile part (320) and the third projectile part (330) are each formed in a truncated cone shape.

[0083] The first projectile part (310) is formed in a Tangent Ogive Nose Shape.

[0084] Because water is about 800 times denser than air and has high viscosity, underwater vehicles are significantly affected by fluid resistance (drag, viscous resistance, pressure resistance).

[0085] The first projectile part (310) is formed in an Ogive Nose Shape that forms a smooth curve and narrows to a sharp point, thereby minimizing separation of water flow and maintaining laminar flow instead of turbulence, so as to maximize the high-speed flight state.

[0086] The above projectile (300) may be formed in a cone shape in which the diameter gradually increases from the first projectile section (310) toward the fourth projectile section (340).

[0087] The apex angle between the two parentheses formed by the first projectile part (310) is the largest, and the angle between the two parentheses formed by the fourth projectile part (340) is the smallest.

[0088] The above projectile (300) is formed such that its total length exceeds 3 relative to its maximum diameter.

[0089] In this embodiment, the length of the fourth projectile part (340) is formed to exceed half of the total length of the projectile (300).

[0090] The above projectile (300) further includes a projectile support member (345) that protrudes in the opposite direction of flight from the side opposite the flight direction of the fourth projectile member (340).

[0091] The above projectile support (345) is formed in a conical shape.

[0092] The above projectile support member (345) is supported by the closure (260), thereby preventing the projectile (300) from moving inside the projectile housing (201) and suppressing changes in the center of gravity or center of pressure during flight, thereby improving flight stability and accuracy.

[0093] The vertex of the above projectile support (345) is positioned at the axis center (S).

[0094] Since the first closure groove (261) is formed as a conical groove corresponding to the projectile support member (345), it is possible to prevent the projectile support member (345) from deviating from the axis center (S) during the production of the projectile, and thereby improves assembly precision, thereby improving flight stability and destructive power.

[0095] In this embodiment, the outer surface of the second projectile part (320) is fitted and fixed to the inner surface of the second projectile housing (220).

[0096] In this embodiment, the interior of the first projectile housing (210) is formed by filling it in a solid form, and the projectile housing space (202) is formed inside the second projectile housing (220), the third projectile housing (230), and the fourth projectile housing (240).

[0097] The above-mentioned projectile housing space (202) is formed in a shape in which the inner diameter narrows as it approaches the first projectile housing (210).

[0098] The thickness of the second bullet housing (220), the third bullet housing (230), and the fourth bullet housing (240) is formed uniformly so that the bullet housing (201) is intentionally torn upon underwater collision of the bullet.

[0099] The internal space of the second projectile housing (220) among the projectile housing spaces (202) is defined as the pointed space (224).

[0100] The above-mentioned pointed space (224) is formed by the above-mentioned second-1 projectile housing part (221) and second-2 projectile housing part (222).

[0101] Since the above-mentioned second-second projectile housing part (222) is bent toward the axis center (S), the inner diameter of the pointed space (224) on the side opposite the flight direction is formed to be narrower.

[0102] Since the above 3-1 projectile housing part (231) is formed by being bent from the above 2-2 projectile housing part (222), the outer surface of the above 2 projectile part (320) is supported by the bent portion of the above 3-1 projectile housing part (231) and the above 2-2 projectile housing part (222) or by the inner surface of the above 3-1 projectile housing part (231).

[0103] Since the above-mentioned third-1 projectile housing part (231) wraps around and fixes the outer surface of the above-mentioned second projectile part (320), the projectile (300) can be prevented from deviating from the axis center (S), and thereby the assembly precision of the above-mentioned projectile (200) can be improved.

[0104] As such, since the front side of the projectile (300) according to the present embodiment is fitted and fixed to the third-1 projectile housing part (231) and the rear end is supported by the closure (260), the axis center of the projectile (300) can be precisely positioned at the axis center (S) of the projectile housing (201) when assembling the projectile (300) and the projectile housing (201), thereby improving flight stability.

[0105] Meanwhile, the cartridge case (150) comprises a cartridge case base (155) through which the primer (110) is installed, a first cartridge case housing part (151) formed in a cylindrical shape by being bent at the edge of the cartridge case base (155), a second cartridge case housing part (152) that extends from the first cartridge case housing part (151) toward the bullet (200) and is formed with a diameter that gradually decreases, a third cartridge case housing part (153) that extends from the first cartridge case housing part (151) toward the bullet (200) and is formed to surround the bullet (200), and a fourth cartridge case housing part (154) that is disposed on the bullet (200) side of the third cartridge case housing part (153) and is bent radially inward to be coupled with the bullet (200).

[0106] In this embodiment, the third cartridge housing portion (153) is formed to surround the outer surface of the fourth-fourth bullet housing portion (244). In this embodiment, the closure (260) is positioned inside the third cartridge housing portion (153).

[0107] Since the inner diameter of the second cartridge housing (152) is shaped to gradually decrease, the pressure from the explosion of the propellant (120) can be effectively transmitted to the closure (260).

[0108] Then, the fourth cartridge housing part (154) is bent into the third cavitation groove (273) and combined with the bullet (200). Specifically, the fourth cartridge housing part (154) is bent in the direction of the axis center (S) and molded to wrap around the fourth-third bullet housing part (243) and combined with the bullet (200).

[0109] A cartridge case space (150b) is formed inside the cartridge case (150) and is connected to the cartridge case opening (150a). The propellant (120) is stored in the cartridge case space (150b) and ignited by the primer (110).

[0110] After the bullet (200) and cartridge case (150) are separated by the explosion of the propellant (120), the third cavitation groove (273), where the fourth cartridge case housing part (154) was placed, functions as a groove that generates or maintains a supercavitation shape during the flight of the bullet (200), and has the feature of being able to reduce the overall length of the bullet.

[0111] The projectile (200) according to the present embodiment further includes a tearline assembly (280) formed on the inner surface of the projectile housing (201). The projectile housing (201) can be easily cut through the tearline assembly (280), and thereby the escape velocity of the projectile (300) can be sufficiently secured.

[0112] Since the above tearline assembly (280) is formed on the inner surface of the above projectile housing (201), it has the characteristic of being able to minimize the effect of air resistance when flying in the air.

[0113] That is, the projectile according to the present embodiment has the characteristic that it can be used for both airborne and underwater launches.

[0114] The above-mentioned projectile housing (201) further includes a pointed space (213) positioned toward the projectile tip (315) and arranged to form the projectile housing space (202) by being disposed on the inner side of the first projectile housing (210), and a pointed space inner side (223) connected to the pointed space tower (213) and forming the inner side of the second-1 projectile housing part (221).

[0115] The above-mentioned pointed space (224) is formed in the shape of a truncated cone with a cross-section that narrows toward the flight direction. The above-mentioned pointed space tower (213) and the inner surface of the pointed space (223) form the pointed space (224).

[0116] The above-mentioned tearline assembly (280) includes a slope groove formed on the inner side surface (223) of the pointed space.

[0117] In this embodiment, the slope groove is formed concavely in the outer direction from the inner side of the pointed space (223) and is formed long in the longitudinal direction of the second-1 bullet housing part (221).

[0118] The above slope grooves are arranged in multiple numbers and, when viewed from the bottom view, include a first slope groove (281), a second slope groove (282), a third slope groove (283), and a fourth slope groove (284).

[0119] Based on the above axis center (S), the first slope groove (281), the second slope groove (282), the third slope groove (283), and the fourth slope groove (284) are arranged at equal intervals of 90 degrees.

[0120] The longitudinal cross-sections of the first slope groove (281), second slope groove (282), third slope groove (283) and fourth slope groove (284) are formed as grooves in the shape of isosceles triangles.

[0121] The above-described teal line assembly (280) is positioned at the center of the first slope groove (281), the second slope groove (282), the third slope groove (283), and the fourth slope groove (284), and further includes a teal line groove (285) formed concavely along the axis center (S) from the pointed space tower (213) toward the projectile tip (215).

[0122] The first slope home (281), the second slope home (282), the third slope home (283), and the fourth slope home (284) are connected to the tee line home (285).

[0123] The tearline groove (285) is aligned with the projectile tip (315) in the direction of the axis center (S). When the projectile housing (201) enters the water, the projectile tip (315) can enter the tearline groove (285) and cut the projectile housing (201).

[0124] In this embodiment, the first slope groove (281), the second slope groove (282), the third slope groove (283), and the fourth slope groove (284) may be extended to the second-2 ballistic housing part (222) and the third-1 ballistic housing part (231).

[0125] Specifically, the first slope groove (281), the second slope groove (282), the third slope groove (283), and the fourth slope groove (284) may be arranged to extend along the inner surface of the second-2 projectile housing part (222) and the third-1 projectile housing part (231) to surround the second projectile part (320).

[0126] When the second projectile part (320) is in close contact with the inner surface of the second projectile housing (220), the groove-shaped first slope groove (281), second slope groove (282), third slope groove (283), and fourth slope groove (284) can be elastically deformed so that the second projectile part (320) can enter, thereby having the feature of being able to firmly fix the projectile (300).

[0127] When the above-mentioned projectile (300) is firmly fixed in place, it is possible to suppress changes in the center of pressure or center of gravity during flight, and thereby improve accuracy.

[0129] FIG. 6 is a cross-sectional view of a projectile according to a second embodiment of the present invention.

[0130] The projectile (200) according to the present embodiment further includes a projectile blade (380) disposed on the outer surface of the second projectile part (320) and inserted into the slope groove.

[0131] The above projectile blade (380) is inserted into the slope groove and extends long in the longitudinal direction of the slope groove.

[0132] The projectile blade (380) comprises a first blade (381) inserted into the first slope groove (281) and extending long in the longitudinal direction of the first slope groove (281), a second blade (382) inserted into the second slope groove (282) and extending long in the longitudinal direction of the second slope groove (282), a third blade (not shown) inserted into the third slope groove (283) and extending long in the longitudinal direction of the third slope groove (283), and a fourth blade (384) inserted into the fourth slope groove (284) and extending long in the longitudinal direction of the fourth slope groove (284).

[0133] Each slope groove can be easily cut through the first blade (381), second blade (382), third blade (not shown), and fourth blade (384), and the projectile (300) has the feature of improving straightness when entering the water.

[0134] The remaining configurations below are similar to the first embodiment, so a detailed description is omitted.

[0136] Although specific embodiments have been described in the detailed description of the present invention, it is understood that various modifications are possible within the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims set forth below as well as equivalents thereof. Explanation of the symbols

[0138] 110: Detonator 120 : Explosive charge 150: Cartridge case 200 : Bullet 201 : Tanza Housing 210 : 1st Bullet Housing 220 : 2nd Bullet Housing 230 : 3rd Bomb Housing 240 : 4th Bullet Housing 260 : Closer 270 : Cavitator 300 : Projectile 310: 1st projectile section 320: Second projectile section 330: 3rd projectile section 340: 4th projectile section

Claims

Claim 1 In the case of a bullet, a bullet housing (201) having a bullet opening (205) formed toward the cartridge case (150); and a projectile (300) disposed inside the bullet housing (201); It includes a closure (260) assembled to the above-mentioned projectile housing (201) to close the projectile opening (205); and a cavitator (270) is formed that artificially generates bubbles at the tip during flight to artificially create a supercavitation phenomenon in which the outer surface of the projectile housing (201) is wrapped in bubbles; the projectile housing (201) includes a first projectile housing (210) positioned at the tip of the flight direction, a second projectile housing (220) connected to the first projectile housing (210), a third projectile housing (230) connected to the second projectile housing (220), and a fourth projectile housing (240) connected to the third projectile housing (230) and having the projectile opening (205) formed in the direction of the cartridge case (150). The projectile (300) comprises a first projectile part (310) having a pointed projectile tip (315) formed in the flight direction, a second projectile part (320) extending from the first projectile part (310) in the opposite direction of flight, a third projectile part (330) extending from the second projectile part (320) in the opposite direction of flight, and a fourth projectile part (340) extending from the third projectile part (330) in the opposite direction of flight, and the cavitator (270) comprises a first cavitation groove (271) disposed in the first projectile housing (210), a second cavitation groove (272) disposed in the second projectile housing (220), and a third cavitation groove (273) disposed in the fourth projectile housing (240), and the cartridge case (150) is the It further includes a tearline assembly (280) formed on the inner surface of the projectile housing (201) and folded into a third cavitation groove (273) and combined with the projectile housing (201), and a projectile housing space (202) is formed inside the projectile housing (201), and the projectile housing (201) is disposed on the inner surface of the first projectile housing (210) to form the projectile housing space (202).The apparatus further comprises a pointed space tower (213) positioned toward the projectile tip (315), and a pointed space inner surface (223) connected to the pointed space tower (213) and forming the inner surface of the second projectile housing (220); the tapered assembly (280) includes a slope groove formed on the pointed space inner surface (223); the slope groove is formed concavely outwardly from the pointed space inner surface (223) and is formed long in the longitudinal direction of the second projectile housing (220); a plurality of slope grooves are arranged and, when viewed from the bottom view, include a first slope groove (281), a second slope groove (282), a third slope groove (283), and a fourth slope groove (284); the projectile housing (201) is formed in a conical shape overall. A projectile further comprising a projectile blade (380) that is positioned on the outer surface of the second projectile part (320) and inserted into the slope groove, wherein a virtual axis center (S) is formed, and the first slope groove (281), the second slope groove (282), the third slope groove (283), and the fourth slope groove (284) are arranged at equal angles spaced apart at 90-degree intervals with respect to the axis center (S).

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