• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention describes a cartridge case ejection system (300) for a firearm using a bolt carrier assembly (100). The cartridge case ejection system (300) includes a drive rod (305) and an L-shaped deflector (350) for laterally pushing a cartridge case (12) into an ejection chute (500). The drive rod (305) is disposed substantially above the lock carrier assembly (100). The cartridge case (12) in the ejection chute is then ejected through an ejection port (600) located at a position in front of a trigger and on one side of the firearm. A shutter (230) of the shutter carrier has a lock cam pin (250) rotatably connected to the shutter. When the latch is not received in the latch carrier, the latch cam pin (250) blocks a central bore in the latch to prevent a striker (235) from being inserted.
    公开号:AT519342A1
    申请号:T9110/2016
    申请日:2016-03-31
    公开日:2018-05-15
    发明作者:Hok Aw Cheng；Hong Samuel Pang Kheng；Wah Chee Tuck；Qiang Tang Wei
    申请人:Advanced Mat Engineering Pte Ltd；
    IPC主号:
    专利说明:

    Cartridge Forward Dispensing System Field of the Invention The present invention relates to a cartridge case ejection system for a firearm equipped with a closure assembly. In particular, the cartridge case is ejected both to the front and to one side of the firearm, d. H. at a safe distance from the shooter of the firearm. The closure assembly is also provided with a locking cam pin to prevent inadvertent insertion of a firing pin without associated cam pin (234) during insertion of the closure assembly and the cartridge shell ejection system.
    Background [002] A firing gun closure assembly 10 includes a closure carrier 20 and a closure 30 that moves in the closure carrier 20. A front end of the closure 30 has an extractor 34 and a plurality of warts 36. The warts 36 are aligned with cooperating slots at the back of the barrel to lock the closure during firing and unlock the closure after firing. After a cartridge is fired, the high pressure gas in the cartridge chamber is used to drive a piston assembly 50, which in turn moves the latch carrier 20 rearwardly; when the shutter carrier is moved backward, the shutter 30 is also rotated; the rotation of the shutter 30 unlocks the warts from the cooperating slots at the rear end of the runner and then allows the extractor 34 to pull the spent cartridge cartridge case 12 out of the cartridge chamber. In U.S. Patent No. 6,625,917 to Heckler & Koch GmbH hits the cartridge case, moving backwards, onto an ejection rod; this causes the cartridge case 12 is inclined laterally and released from the extractor 34; the kinetic energy of the cartridge case then causes the cartridge case to be ejected from the firearm.
    Conventionally, most right-handed firearms are designed and the hot cartridge cases 12 are ejected on the right side. A left-hander using such a right-handed firearm runs the risk of being hit by the hot cartridge cases. This problem is even more serious if the firearm has a bullpup design because the hot cartridge cases 12 are ejected closer to the shooter's arm or face.
    It is thus apparent that there is a need for a different type of mechanism to eject the hot cartridge cases at a safe distance from the shooter.
    Summary The following is a simplified summary to provide a basic understanding of the present invention. This summary is not a comprehensive overview of the invention and is not intended to identify key features of the invention. Rather, it serves to illustrate the inventive concept of this invention in a general manner as an introduction to the following detailed description.
    The present invention provides a cartridge case ejection system for a firearm, particularly with bullpup construction. Preferably, the firearm comprising the cartridge case ejection system is usable by both right-handed and left-handed users. A latch cam pin is provided on the latch assembly to prevent inadvertent insertion of a striker without insertion of an associated cam pin (234) during insertion of the latch assembly and the cartridge tube ejection system.
    In one embodiment, the present invention provides a cartridge case ejection system for a firearm using a bolt carrier assembly, the system comprising: an elongated closure arranged to move along and about a longitudinal axis in a bolt carrier a front surface of the closure having an extractor for holding a cartridge case thereon; an elongate drive rod disposed substantially parallel to the longitudinal axis of the closure and closure carrier, the front end of the drive rod having an L-shaped deflector and the rear end having a cam pin and a cam engagement slot in a sleeve disposed about the rear end the L-shaped deflector is in a home position that is forwardly spaced and spaced from the front surface of the closure; an ejection chute, which is parallel to the drive rod and has an elongated opening for receiving a cartridge case, which is held on the front surface of the extractor; and a discharge device extending from the shutter carrier into the ejection chute near a rear end of the elongate opening and movable in accordance with a longitudinal stroke of the cam pin in the cam slot to a front end of the elongated opening; wherein, after an initial predetermined backward movement, further backward movement of the cam pin in the cam engagement slot causes the drive rod to rotate and push the cartridge case laterally into the ejection chute through the elongate opening. The return stroke of the piston subassembly advances the lock carrier by means of a return spring and the cartridge case in the exit chute is forced out of the firearm by the launch device at a safe forward distance and on one side of the firearm.
    In one embodiment of the ejection system, the initial predetermined backward movement of the drive rod is accompanied by combined longitudinal movement and rotation of the closure, the combined longitudinal movement and rotation of the closure being created by a transverse pin on the closure engaged with a curved slot. which is formed in the closure carrier. The initial predetermined backward movement of the drive rod is generated by the cam pin running in an initial straight portion of the cam slot.
    Preferably, the closure carrier is driven by a piston subassembly. The piston subassembly and the ejection chute are disposed on opposite sides of the shutter carrier.
    Preferably, a torsion spring is disposed about the drive rod to return the L-shaped deflector from an actuated position to the initial position.
    A jaw clutch limiter may be employed to define or adjust the output and actuated position of the L-shaped deflector with respect to rotation.
    Preferably, a tension spring is adjacent to the elongated opening of the ejection chute, so that the contact force can act on a cartridge case to bend the tension spring when the cartridge case enters the ejection chute, after which the tension spring holds the cartridge case within the ejection chute.
    Preferably, a locking cam pin is provided along one side of the closure to obstruct a central bore cavity. Of the
    Locking cam pin is sprung and the central bore cavity is normally locked until a cam pin (234) is inserted into the closure. The normally obstructed central bore cavity ensures that the firing pin is blocked during insertion of the closure assembly and the cartridge case ejection system.
    Brief Description of the Drawings The invention will be described by way of non-limiting embodiments of the present invention, with reference to the accompanying drawings, in which: FIG. FIG. 1A is a top, left, rear perspective view of a firearm including a bolt carrier and a cartridge case ejection system according to one embodiment of the present invention; FIG. FIG. FIG. 1B is a view of the firearm of FIG. 1A from the right shows; FIG. 1C shows the left side of the firearm of FIG. 1A without hand guard, housing top and magazine shows; FIG. FIG. 2A illustrates a gas powered latch support assembly and the cartridge shell ejection system with a cap and deflector of the cartridge shell ejection system in their home position while FIG. 2B the
    Lock carrier and a cartridge case ejection mechanism shows. FIG. Figure 2C shows the closure in a secured position during use; FIG. 2D shows how the deflector is actuated and the cartridge case is pushed into an ejection slide; and FIG. Figure 2E shows a plan view of the firearm with a spent cartridge case ejected at the ejection port; and FIG. 3A shows the shutter assembly while FIG. 3B one
    Exploded view of parts of the closure assembly shows.
    DETAILED DESCRIPTION Hereinafter, one or more specific and alternative embodiments of the present invention will be described with reference to the attached drawings. However, it will be apparent to those skilled in the art that this invention can be practiced without such specific details. Some of the details may not be described in detail so as not to obscure the invention. For the sake of simplicity, like reference numerals or sequences of numbers will be used throughout the figures to refer to the same or similar features throughout the figures.
    FIG. 1A shows a bullpup firearm that includes a gas powered shutter carrier assembly 100 and a cartridge case ejection system 300 in accordance with the present invention. As shown, the firearm has a barrel 1, a hand guard 2, an upper housing part 3, a lower housing part 4, a magazine 5 and a piston 6. FIG. Figure 1B is a right side view showing an ejector port 600 through which spent cartridge cases 12 are ejected from the firearm. The ejection opening 600 is arranged before the withdrawal of the firearm; the ejection opening 600 is also shown in FIG. 2E shown. FIG. FIG. 1C shows a left side view of the firearm and parts of the latch carrier assembly 100 and the cartridge case ejection system 300.
    FIG. 2A shows a close-up view of the closure carrier assembly 100 and cartridge case ejection system 300 from above and in front. FIG. Fig. 2B shows the arrangement of the shutter carrier and the cartridge case ejection system when separated from the firearm. FIG. FIG. 2C shows a plan view of the lock carrier assembly 100 and cartridge case ejection system 300 with an L-shaped deflector 350 in the locked position of the lock carrier while FIG. 2D shows the L-shaped deflector 350 in the tripped position. The lock carrier assembly 100 and the cartridge case ejection system 300 are generally made of a high strength steel alloy. As shown in FIG. 2A-2D, the gas-operated closure support assembly 100 includes a gas piston subassembly 50 connected to a closure 230 and a closure support 200.
    In FIG. 2A, the closure 230 is partially visible. More readily recognizable is the closure 230 in FIG. 3A-3B. The closure 230 is elongated and configured to both translate and rotate in an elongated bore 220 in the closure carrier 200. The bore 220 has a longitudinal axis 221 (more clearly visible in FIG. 2C) that is coaxial with the longitudinal axis of the barrel 1. In the rear end of the bore 220 is a firing pin 235th
    As shown in FIG. 3A-3B, the front end of the closure 230 has an extractor 34 and a plurality of warts 36. The warts 36 are shaped and dimensioned such that upon rotation with slots or grooves (not shown in the figures) at the end of the barrel 1, cooperation such that a front surface 230a of the closure 230 is in contact with the rear of the cartridge case or cartridge 12. The extractor 34 is elongate and pivots about an axis (about pin 40) transverse to the longitudinal axis 221 of the closure 230 such that a proximal claw-like tooth 35 is operated to engage an edge of the cartridge case or cartridge 12. The extractor 34 is biased by a spring 41 so that the claw-like tooth 35 is normally in the latched position. Preferably, a rubber insert 42 is provided within the spring 41 to hold the spring in position. Preferably, the extractor 34 is in a 12 o'clock position. However, the position of the extractor 34 is not limited thereto, and the claw-like tooth 35 may be located at a different position on the front surface 230a of the shutter 230.
    At a distal end of the closure 230 is a cam pin 234. The cam pin 234 extends transversely to the longitudinal axis 221 of the closure 230 and is arranged to slide along a curved slot 224 which extends along a portion of the cylindrical bore 220 is formed. After a cartridge 12 has been fired, high pressure gas is directed outwardly from the cartridge chamber to drive the piston subassembly 50; The high-pressure gas then pushes both the closure 230 and the closure support 200 to the rear. The rotational movement of the cam pin 234 along the curved slot 224 causes the closure 230 to rotate and unlock the warts 36 from the slots at the end of the barrel 1; after an initial or first predetermined backward movement, the L-shaped deflector 350 is placed in front of the front surface 230a of the closure 230 a short distance from the extractor 34 and the warts 36. Further backward movement of the closure 230 and the closure carrier 200 is accompanied by a backward movement of a drive rod 305 which actuates the L-shaped deflector 350. The drive rod 305 is disposed above and substantially parallel to the shutter 230; the centerline of the drive rod 305 is designated by the number 306. A distal end of the drive rod 305 has a transverse cam pin 310 which cooperates with a cylindrical sleeve 320. The cam pin 310 is constrained to slide in a cam slot 324 formed along a longitudinal axis of the cylindrical sleeve 320, causing the drive rod 305 to rotate counterclockwise (as seen from the rear in FIG. 2A) by an angle of essentially 110 degrees. The cam slot 324 has an initial slot 324a which is straight and parallel to the longitudinal axis of the cylindrical sleeve, the length of the initial slot 324a corresponding to the initial or first predetermined rearward movement of the closure 230. When a cartridge case 12 is held by the extractor 34 on the front surface 230a of the closure, rotation of the drive rod 305 (after the initial predetermined backward movement) causes the L-shaped deflector 350 to strike a lateral side of the cartridge case 12 and the cartridge case to the right in an ejection slide 500 presses. The side of the ejection chute 500 adjacent to the L-shaped deflector and the closure carrier has an elongate opening 502 which passes through the cartridge case. As seen in FIGS. 2A-2C, the drive rod 305 is disposed above and parallel to the closure 230 such that a contact surface or contact line 352 along a contact surface of the L-shaped deflector 350 with the cartridge shell 12 has substantially a pivot radius R about the axis 306 having the drive rod. Preferably, the contact surface 352 on the L-shaped deflector 350 has a profile such that there is a contact force in a direction that urges the cartridge shell through the elongated opening 502 and into the ejection slide 500. As also shown in FIG. 2C and 2D, a torsion spring 360 returns the L-shaped deflector 350 to its initial angular position as the piston subassembly 50 springs back, and the drive rod 305 and closure 230 return to their secured position. An ejector 370 extends from the closure carrier 200 into the ejection chute 500 through the elongated opening 502; the forward return movement of the closure carrier 200 causes the ejector 370 to push the cartridge case 12 forwardly along the ejection slide 500. Finally, the cartridge case 12 is ejected through an ejection opening 600 located on the right side of the firearm, as shown in FIG. 2E.
    After a cartridge case 12 has been ejected, the cam pin 310 is moved back along the initial elongate portion 324a of the cam slot 324 and the closure 230 is then returned to its home position so that the front closure surface 230a is in contact with the rear of the next cartridge case 12 comes. This cycle of movement of the piston subassembly 50, the closure carrier 200, the closure 230, the L-shaped deflector 350 and the drive rod 305 enables the automatic retrieval of spent cartridge cases 12 from the travel chamber and their ejection through the ejection opening 600.
    A conventional approach to solving the problem of right- and left-handed shooters is to make the conventional cartridge case ejection mechanism laterally reversible. However, in the present invention, the cartridge cases 12 are ejected at a safe forward distance with respect to the trigger or barrel 1 through the forward ejection opening 600 in the hand guard 2; The hot spent cartridge cases 12 are thus ejected at a safe distance from the shooter, so there is no need to make the cartridge case ejection system 300 of the present invention laterally reversible.
    As also shown in FIG. 2A, the lock carrier 200 to which the drive rod 305 is attached has a front end having a jaw clutch limiter 380. The jaw clutch limiter 380 consists of an angular recess 381 on a front end surface of the lock carrier and a toothed ring 382. The angular recess 381 allows rotation of the toothed ring 382 by substantially 110 degrees. The toothed ring 382 is annularly mounted on the drive rod 305, for example with an adjusting screw. The dog clutch limiter 380 thus allows the drive rod 305 to be inserted into the lock carrier 200, thus allowing adjustment of the angular position of the L-shaped deflector 350 with respect to the drive rod 305 during assembly. The torsion spring 360 acting on the drive rod 305 always keeps the two components of the jaw clutch limiter 380 in contact with each other.
    Preferably, a tension spring 364 is disposed adjacent to the elongated opening 502. During use, when the L-shaped deflector 350 pushes a cartridge case 12 into the ejection slide 500, the force on the cartridge case bends the body of the tension spring 364 as the cartridge case is moved into the ejection slide 500; as soon as a cartridge case is pushed over the body of the tension spring 364, the tension spring 364 ensures that the cartridge case 12 remains within the ejection slide 500.
    In the above description, the piston subassembly 50 is to the left of the latch support assembly 100 as shown in FIG. 2A, while the ejection chute 500 is on the right side. The principle of the present invention remains, even if the piston subassembly is located on the right side of the closure carrier assembly and the ejection chute on the left side; Thus, there is no need to describe this alternative arrangement of the closure support assembly and the ejection chute.
    Returning to FIGS. 3A-3B, the closure assembly is also provided with a locking cam pin 250 which is elongate and has a distal end and a proximal end; a distal (tail) end terminates with a claw 254 to prevent inadvertent insertion of the firing pin 235 without inserting the locking cam pin 250 during insertion of the closure assembly and the cartridge shell ejection system. When imported into recess 252, the locking cam pin 250 is held in place by a pivot 257 having a compression spring 258 which applies a biasing force to the proximal end so that the claw 254 blocks a central bore which receives the firing pin 235 in the closure. When the closure 230 is properly assembled, the proximal end of the closure carrier is depressed and the jaw 254 is tilted outwardly exposing the central bore. During the process of assembling or disassembling (eg, cleaning the firearm) and when the closure 230 is not received in the closure carrier, the central bore is blocked by the jaw 254, thereby preventing the firing pin 235 from extending into the closure 230. In this way, the locking cam pin 250 provides a safety feature to prevent incomplete insertion of the closure 230; in the same way this prevents inadvertent firing of a cartridge without proper assembly of the locking cam pin 250.
    While specific embodiments have been described and illustrated, it should be understood that many changes, modifications, variations and combinations thereof are possible with respect to the present invention without departing from the scope of the invention. For example, the longitudinal axis 306 of the drive rod 305 is described as above the longitudinal axis 221 of the closure 230; the longitudinal axis 306 of the drive rod 305 may also be offset laterally to the left or right with respect to the longitudinal axis 221 of the closure 230 as long as the radial pivot R of the L-shaped deflector 350 with respect to the position of the elongated opening 502 on the ejection slide and Rotation angle of the drive rod 305 takes place.
    权利要求:
    Claims (15)
    [1]
    claims:
    A cartridge case ejection system for a firearm utilizing a bolt carrier assembly, the system comprising: an elongated latch arranged to move and rotate about a longitudinal axis in a latch carrier, a front surface of the shutter being an extractor to the cartridge Holding a cartridge case thereon; an elongate drive rod disposed substantially parallel to the longitudinal axis of the closure and closure carrier, the front end of the drive rod having an L-shaped deflector and the rear end having a cam pin and a cam engagement slot in a sleeve disposed about the rear end the L-shaped deflector is in a home position that is forwardly spaced and spaced from the front surface of the closure; an ejection chute, which is parallel to the drive rod and has an elongated opening for receiving a cartridge case, which is held on the front surface of the extractor; and an ejection device extending from the shutter carrier into the ejection chute near a rear end of the elongate opening and movable in accordance with a longitudinal stroke of the cam pin in the cam slot to a front end of the elongated opening; wherein, after an initial predetermined backward movement, further backward movement of the cam pin in the cam engagement slot causes the drive rod to rotate and push the cartridge shell laterally into the ejection chute through the elongate opening such that the cartridge case in the ejection chute is forced outward by the ejector to move in one safe distance vome and ejected on one side of the firearm.
    [2]
    The cartridge case ejection system of claim 1, wherein the initial predetermined backward movement of the drive rod is accompanied by combined longitudinal movement and rotation of the closure, the combined longitudinal movement and rotation of the closure being provided by a cross pin on the closure engaging a curved slot is, which is formed in the closure carrier.
    [3]
    The cartridge case ejection system of claim 2, wherein the initial predetermined backward movement of the drive rod is generated by the cam pin passing in an initial straight portion of the cam slot.
    [4]
    The cartridge case ejection system of any one of claims 1-3, further comprising a piston subassembly to drive the latch carrier backward with a return spring in the piston subassembly driving the latch carrier forward.
    [5]
    The cartridge case ejection system of claim 4, wherein the piston subassembly and the ejection chute are disposed on opposite sides of the closure carrier.
    [6]
    The cartridge case ejection system of any one of claims 1-5, further comprising a torsion spring disposed about the drive rod for returning the L-shaped deflector to the initial position with rotation from an actuated position.
    [7]
    The cartridge case ejection system of claim 6, further comprising a jaw clutch limiter for defining the output and actuated position of the L-shaped deflector with respect to rotation.
    [8]
    8. cartridge case ejection system according to any one of claims 1-7, wherein a radial pivot R of the L-shaped deflector is based on a distance of the drive rod longitudinal axis of the longitudinal axis of closure.
    [9]
    9. cartridge case ejection system according to any one of claims 1-8, wherein a contact surface of the L-shaped deflector has a profile, so that a contact force with the cartridge case, the cartridge case passes into the ejection slide.
    [10]
    A cartridge case ejection system according to any one of claims 7-9, wherein the torsion spring ensures that two components of the dog clutch restrictor are always in contact with each other.
    [11]
    A cartridge case ejection system according to any one of claims 1-10, further comprising a tension spring disposed adjacent to and substantially parallel to the elongate aperture of the ejection slide such that the contact force on a cartridge case may act to bend the tension spring. when the cartridge case is guided into the ejection chute, after which the tension spring holds the cartridge case within the ejection chute.
    [12]
    12. Cartridge ejection system according to one of claims 1-11, wherein the closure comprises a locking cam pin which is rotatably connected thereto, and a compression spring biases a proximal end of the locking cam pin so that a distal end of the locking cam pin locking a central bore in the closure and prevents inadvertent insertion of a firing pin in the central bore.
    [13]
    A firearm equipped with a cartridge case ejection system according to any one of claims 1-11.
    [14]
    14. A firearm equipped with a locking cam pin on a closure to obstruct a central bore in the closure to prevent inadvertent incomplete insertion of the closure into a closure carrier.
    [15]
    15. A lock carrier assembly of a firearm, comprising a locking pin rotatably mounted on a body of a closure to obstruct a central bore in the closure to prevent inadvertent movement of a firing pin until the locking cam pin is received in the closure carrier.
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    CH653125A5|1985-12-13|FIREARMS, ESPECIALLY FIREARMS.
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    同族专利:
    公开号 | 公开日
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    SG11201708040SA|2017-10-30|
    WO2016159888A1|2016-10-06|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3057100A|1947-01-09|1962-10-09|United Shoe Machinery Corp|Extractor for automatic guns|
    US20150040451A1|2013-03-15|2015-02-12|Desert Leasing & Licensing, Llc|Forward ejection assembly for firearms|
    BE1012500A3|1999-03-04|2000-11-07|Fn Herstal Sa|Firearm with forward ejection or postponed to the front of the weapon.|
    US7469496B1|2006-09-19|2008-12-30|Kel-Tec Cnc Industries, Inc.|Dual pivoting extractors|
    CN103822533B|2014-03-10|2016-03-16|宋益伶|Elasticity break-in extractor|USD865105S1|2017-04-26|2019-10-29|Paul A. Oglesby|Firearm pin|
    USD851198S1|2017-05-30|2019-06-11|WHG Properties, LLC|Cam pin|
    IT201800006178A1|2018-06-11|2019-12-11|Gerardo Gabriele Restaino|FRONT EXPULSION DEVICE FOR FIREARMS|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SG10201502530P|2015-03-31|
    PCT/SG2016/050163|WO2016159888A1|2015-03-31|2016-03-31|Forward ejection system of casing|
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