Single barrel shotgun shell ejector mechanism

Abstract

This invention discloses a shell-breaking mechanism for a single-barrel shotgun, which uses a release spring to store energy and achieve shell-breaking. The weapon includes a receiver and a barrel assembly. The lower end of the barrel assembly is hinged to the receiver via a barrel seat. The receiver has a firing pin seat. The rear end of the barrel assembly has a cartridge groove. The barrel assembly has a guide hole, within which are an ejector and an ejector lever. The ejector and ejector lever are engaged. The rear end of the ejector has a ejection arm, and the end of the ejection arm has an arc-shaped ejection catch. The arc-shaped ejection catch engages with the arc-shaped protrusion at the tail of the cartridge in the cartridge groove. The lower rear end of the ejector has an ejector arc surface. The ejector is fitted with an ejector spring, the two ends of which act on the ejector and the guide hole, respectively. The lower front end of the ejector lever has an upper engagement surface, and the upper front end of the barrel seat has a corresponding lower engagement surface. The upper front end of the ejector lever has a return spring. The front end of the receiver has an upwardly extending release protrusion, and the lower front end of the ejector lever has a release surface.

Description

Technical Field

[0001] This invention relates to the field of shotgun technology, and in particular to a shell-breaking mechanism for a single-barrel shotgun. Background Technology

[0002] A single-barreled shotgun is a low-spec, single-shot shotgun product that uses a manually operated barrel lever for opening and closing. Most of them use manual cartridge cases and manual loading. Single-barreled shotguns rarely have automatic ejection (or case ejection) mechanisms, mainly because of their complex structure and higher cost. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a single-barrel shotgun shell-firing mechanism that uses a release spring to store energy to achieve shell firing.

[0004] The objective of this invention is achieved as follows:

[0005] A single-barrel shotgun ejection mechanism includes a receiver and a barrel assembly. The lower end of the barrel assembly is hinged to the receiver via a barrel seat. A firing pin seat is provided on the receiver. A cartridge groove is provided at the rear end of the barrel assembly, opposite to the firing pin seat. A guide hole is provided axially at the bottom of the rear end of the barrel assembly. The guide hole is a stepped hole, smaller at the front and larger at the rear. An ejector and an ejector pull rod are provided within the guide hole. The ejector and ejector pull rod are engaged together. The ejector is a stepped shaft. The larger diameter section of the ejector slides with the larger diameter section of the guide hole, and the smaller diameter section of the ejector slides with the smaller diameter section of the guide hole. The ejector pull rod is located within the smaller diameter section of the guide hole. The rear end of the guide hole is connected to an upwardly extending through groove. The ejector is connected to the lower end of the cartridge groove of the barrel assembly. The tail end of the ejector is provided with a shell-firing arm that cooperates with the through groove. The end of the shell-firing arm is provided with an arc-shaped ejector clip. The arc-shaped ejector clip is used to engage with the arc-shaped protrusion at the tail of the cartridge in the cartridge groove. The lower rear end of the ejector is provided with an ejector arc surface. The small diameter section of the ejector is fitted with an ejector spring. The two ends of the ejector spring act on the stepped surfaces on the ejector and the guide hole, respectively. The lower front end of the ejector rod is provided with a right-angled upper engagement surface. The upper front end of the barrel seat is provided with a corresponding right-angled lower engagement surface. The upper front end of the ejector rod is provided with a return spring. The front end of the receiver is provided with an upwardly extending release protrusion. The lower front end of the ejector rod is provided with a release surface.

[0006] During the barrel assembly locking process, the front end of the firing pin seat presses forward against the ejector arc surface, causing the ejector to compress the ejector spring and store energy.

[0007] When the barrel assembly is locked, and the ejector rod and ejector are in the front limit position, the front end of the ejector rod extends out of the guide hole, and the upper and lower locking surfaces engage under the action of the return spring.

[0008] During the unlocking process of the barrel assembly, the release convex bulge lifts the release surface, causing the upper and lower locking surfaces to disengage. Under the action of the return spring, the ejector and ejector lever retract, and the ejector lever retracts into the guide hole. The ejector arc-shaped catch brings out the cartridge from the magazine.

[0009] Preferably, the front end of the ejector is provided with a rear hook, and the rear end of the ejector rod is provided with a front hook. The rear hook and the front hook are fastened together, and the fastening point of the rear hook and the front hook is an arc-shaped surface, so that the ejector rod can swing.

[0010] Preferably, the top of the release convex bulge is flat, and the release surface is inclined when the barrel assembly is locked. During the unlocking process of the barrel assembly, the release surface rotates to be parallel to the top of the release convex bulge.

[0011] Preferably, the return spring is an L-shaped leaf spring, and the upper part of the front end of the shell ejector rod is provided with a return spring mounting groove. The return spring mounting groove is inserted into both ends of the return spring. One end of the return spring is axially positioned, and the other end of the return spring can slide, so that the sliding end of the return spring can achieve elastic deformation. The bent part of the return spring protrudes and abuts against the upper end wall of the guide hole.

[0012] Preferably, the bottom of the ejector rod is provided with a longitudinal groove, and a limiting pin is inserted into the groove laterally. The two ends of the limiting pin are fixed to the barrel component. The front end face of the groove is a limiting surface. The limiting pin is used to cooperate with the limiting surface to limit the rear limit position of the ejector rod and the ejector.

[0013] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0014] Using a simple energy storage mechanism, some of the energy during locking is stored in the ejector spring, and this energy is released to the cartridge case during unlocking by using the release bulge of the receiver.

[0015] The unlocking process causes the firing pin seat 6, barrel seat 7, and receiver 8 to interact with each other, enabling the cartridge case to be automatically ejected after unlocking. This avoids the need for manual cartridge case removal and improves the operability of the firearm. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the operation of the present invention (locking);

[0018] Figure 3 This is the state of the case release lever before it is released during unlocking according to the present invention;

[0019] Figure 4 The housing assembly and release bulge of the present invention;

[0020] Figure 5 The barrel component of the present invention (with the ejector spring compressed);

[0021] Figure 6 The barrel component of the present invention (the ejector spring returns to its original state, causing the ejector to release the cartridge case at the instant of the ejection);

[0022] Figure 7 This is a schematic diagram of the shell-removing ejector structure of the present invention;

[0023] Figure 8 This is a schematic diagram of the shell-removing pull rod structure of the present invention.

[0024] Figure Labels

[0025] In the attached diagram, 1 is the ejector, 2 is the ejector spring, 3 is the ejector pull rod, 4 is the limiting pin, 5 is the return spring, 6 is the firing pin seat, 7 is the barrel seat, 8 is the receiver, 101 is the ejector arc surface, 102 is the rear locking hook, 103 is the ejector arc-shaped catch, 201 is the front locking hook, 202 is the limiting surface, 203 is the upper locking surface, 204 is the release surface, 20 is the return spring mounting slot, 301 is the release protrusion, 401 is the lower locking surface, and 402 is the guide hole. Detailed Implementation

[0026] See Figures 1-8This is a single-barrel shotgun ejection mechanism, including a receiver 8 and a barrel assembly. The lower end of the barrel assembly is hinged to the receiver 8 via a barrel seat 7. A firing pin seat 6 is provided on the receiver 8. A cartridge groove is provided at the rear end of the barrel assembly, opposite to the firing pin seat 6. A guide hole 402 is provided axially at the bottom of the rear end of the barrel assembly. The guide hole 402 is a stepped hole, smaller at the front and larger at the rear. An ejector 1 and an ejector pull rod 3 are provided within the guide hole 402. The ejector 1 and the ejector pull rod 3 are fastened together. The ejector 1 is a stepped shaft. The larger diameter section of the ejector 1 slides with the larger diameter section of the guide hole 402, and the smaller diameter section of the ejector 1 slides with the smaller diameter section of the guide hole 402. The ejector pull rod 3 is located within the smaller diameter section of the guide hole 402. The rear end of the guide hole 402 is connected to an upwardly extending through groove. The groove is connected to the lower end of the cartridge groove of the barrel component. The tail end of the ejector 1 is provided with a shell-firing arm that cooperates with the groove. The end of the shell-firing arm is provided with an arc-shaped ejection clip 103. The arc-shaped ejection clip 103 is used to engage with the arc-shaped protrusion at the tail of the cartridge in the cartridge groove. The lower rear end of the ejector 1 is provided with an ejector arc surface 101. The small diameter section of the ejector 1 is fitted with an ejector spring 2. The two ends of the ejector spring 2 act on the stepped surfaces on the ejector 1 and the guide hole 402, respectively. The lower front end of the ejector rod 3 is provided with a right-angled upper engagement surface 203. The upper front end of the barrel seat 7 is provided with a corresponding right-angled lower engagement surface 401. The upper front end of the ejector rod 3 is provided with a return spring 5. The front end of the receiver 8 is provided with an upwardly extending release protrusion 301. The lower front end of the ejector rod 3 is provided with a release surface 204.

[0027] The front end of the ejector 1 is provided with a rear hook 102, and the rear end of the ejector pull rod 3 is provided with a front hook 201. The rear hook 102 and the front hook 201 are fastened together. The fastening point of the rear hook 102 and the front hook 201 is an arc-shaped surface, which allows the ejector pull rod 3 to swing.

[0028] The top of the release protrusion 301 is flat. When the barrel assembly is locked, the release surface 204 is inclined. During the unlocking process of the barrel assembly, the release surface 204 rotates to be parallel to the top of the release protrusion 301.

[0029] The return spring 5 is an L-shaped leaf spring. The upper part of the front end of the shell ejector rod 3 is provided with a return spring mounting groove 20. The return spring mounting groove 20 is inserted into both ends of the return spring. One end of the return spring is axially positioned, and the other end of the return spring can slide, so that the sliding end of the return spring can achieve elastic deformation. The bent part of the return spring protrudes and abuts against the upper end wall of the guide hole 402.

[0030] The bottom of the ejector rod 3 is provided with a longitudinal groove, and a limiting pin 4 is inserted into the groove laterally. The two ends of the limiting pin 4 are fixed to the barrel component. The front end face of the groove is a limiting surface 202. The limiting pin 4 is used to cooperate with the limiting surface 202 to limit the rear limit position of the ejector rod 3 and the ejector 1.

[0031] During the locking process of the barrel assembly, the front end of the firing pin seat 6 presses forward against the ejector arc surface 101, causing the ejector 1 to compress the ejector spring 2 and store energy. When the barrel assembly is locked and the ejector lever 3 and ejector 1 are in the front limit position, the front end of the ejector lever 3 extends out of the guide hole 402. Under the action of the return spring, the upper engagement surface 203 and the lower engagement surface 401 engage. During the unlocking process of the barrel assembly, the release convex 301 pushes up the release surface 204, causing the upper engagement surface 203 and the lower engagement surface 401 to disengage. Under the action of the return spring, ejector 1 and ejector lever 3 retract, and ejector lever 3 retracts into the guide hole 402. The ejector arc-shaped catch 103 carries out the cartridge in the cartridge groove.

[0032] Key points:

[0033] During locking, energy is stored by pressing the ejector arc surface 101 on the end face of the firing pin seat 6 on the casing 8 against the ejector arc surface 101.

[0034] After locking, the return spring 5 interacts with the guide hole 402, causing the ejector rod to rotate downward by an angle. When unlocking, the upper engagement surface 203 of the ejector rod engages with the lower engagement surface 401 of the barrel seat.

[0035] After the barrel is unlocked to a certain angle, the release convex 301 contacts the release surface 204. When the barrel is unlocked further, the ejector lever is released.

[0036] This invention utilizes an unlocking process (clockwise opening of the gun barrel, see...) Figure 1 This allows the firing pin seat 6, barrel seat 7, and receiver 8 to interact with each other, enabling the cartridge case to automatically eject after unlocking, thus avoiding manual cartridge case removal and improving the operability of the firearm.

[0037] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A single-barrel shotgun cartridge ejection mechanism, comprising a receiver and a barrel assembly, the lower end of the barrel assembly being hinged to the receiver via a barrel seat, a firing pin seat being provided on the receiver, and a cartridge groove being provided at the rear end of the barrel assembly, the cartridge groove being opposite to the firing pin seat, characterized in that: The rear end of the barrel assembly has an axially oriented guide hole. This guide hole is a stepped hole, smaller at the front and larger at the rear. An ejector and ejector rod are housed within the guide hole, and are fastened together. The ejector is a stepped shaft, with its larger diameter section slidingly engaging with the larger diameter section of the guide hole, and its smaller diameter section also slidingly engaging with the smaller diameter section of the guide hole. The ejector rod is located within the smaller diameter section of the guide hole. The rear end of the guide hole is connected to an upwardly extending through groove, which communicates with the lower end of the cartridge groove in the barrel assembly. The rear end of the ejector has a cartridge ejection arm that engages with the through groove for ejection. The end of the arm is provided with an arc-shaped ejector clip, which is used to engage with the arc-shaped protrusion at the tail of the cartridge in the magazine. The lower rear end of the ejector is provided with an ejector arc surface. The small diameter section of the ejector is fitted with an ejector spring. The two ends of the ejector spring act on the stepped surfaces on the ejector and the guide hole, respectively. The lower front end of the ejector rod is provided with a right-angled upper engagement surface. The upper front end of the barrel seat is provided with a corresponding right-angled lower engagement surface. The upper front end of the ejector rod is provided with a return spring. The front end of the receiver is provided with an upwardly extending release protrusion. The lower front end of the ejector rod is provided with a release surface. During the barrel assembly locking process, the front end of the firing pin seat presses forward against the ejector arc surface, causing the ejector to compress the ejector spring and store energy. When the barrel assembly is locked, and the ejector rod and ejector are in the front limit position, the front end of the ejector rod extends out of the guide hole, and the upper and lower locking surfaces engage under the action of the return spring. During the unlocking process of the barrel assembly, the release convex bulge lifts the release surface, causing the upper and lower locking surfaces to disengage. Under the action of the return spring, the ejector and ejector lever retract, and the ejector lever retracts into the guide hole. The ejector arc-shaped catch brings out the cartridge from the magazine.

2. The single-barrel shotgun shell-firing mechanism according to claim 1, characterized in that: The front end of the ejector is provided with a rear hook, and the rear end of the ejector rod is provided with a front hook. The rear hook and the front hook are fastened together, and the fastening point of the rear hook and the front hook is an arc-shaped surface, which allows the ejector rod to swing.

3. The single-barrel shotgun shell-firing mechanism according to claim 1, characterized in that: The top of the release convex bulge is flat. When the barrel assembly is locked, the release surface is inclined. During the unlocking process of the barrel assembly, the release surface rotates to be parallel to the top of the release convex bulge.

4. The single-barrel shotgun shell-firing mechanism according to claim 1, characterized in that: The return spring is an L-shaped leaf spring. The upper front end of the shell ejector rod is provided with a return spring mounting groove. The return spring mounting groove is inserted into both ends of the return spring. One end of the return spring is axially positioned, and the other end of the return spring can slide, so that the sliding end of the return spring can achieve elastic deformation. The bent part of the return spring protrudes and abuts against the upper end wall of the guide hole.

5. The single-barrel shotgun shell-firing mechanism according to claim 1, characterized in that: The bottom of the ejector lever has a longitudinal groove, and a limiting pin is inserted into the groove laterally. The two ends of the limiting pin are fixed to the barrel assembly. The front end face of the groove is a limiting surface. The limiting pin is used to cooperate with the limiting surface to limit the rear limit position of the ejector lever and the ejector.

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