A manually operated shotgun adjustable lock release mechanism

Abstract

The application discloses a manually-operated hunting gun adjustable opening and closing lock mechanism, which reduces the manufacturing cost. The mechanism comprises a machine case body, a barrel seat and a trigger seat. The machine case body is internally provided with a machine case body guide rail groove. The machine case body guide rail groove is slidably connected with a lock block. A return spring is arranged between the lock block and the trigger seat. The rear end of the barrel seat is provided with a clamping groove. The front end of the lock block is clamped with the clamping groove of the barrel seat. The barrel seat is provided with a barrel seat inclined surface. The lock block is provided with a lock block front inclined surface. The upper part of the rear end of the machine case body is provided with a machine case body positioning hole and a lock releasing handle. The bottom of the lock releasing handle is provided with a lock releasing lever. The bottom of the lock releasing handle is provided with a lock releasing handle tooth shape. The lock releasing lever is provided with a lock releasing lever tooth shape. The lock releasing handle tooth shape and the lock releasing lever tooth shape are engaged. The lock releasing lever is longitudinally provided with a strip-shaped hole. The strip-shaped hole is fixedly connected with the lock releasing handle through screw thread cooperation. The transverse ends of the lock releasing lever are provided with convex blocks. The lock block is provided with a lock block rear inclined surface.

Description

Technical Field

[0001] This invention relates to the field of shotgun technology, and in particular to an adjustable locking and unlocking mechanism for manual shotguns. Background Technology

[0002] Most bolt-action shotguns use a rotary lever-type locking and unlocking mechanism, which consists of a series of levers, connecting rods, and pins. The manufacturing process requires strict control of component tolerances and demands high assembly precision. This invention provides an adjustable locking and unlocking mechanism that utilizes the toothed engagement structure between the unlocking lever and the unlocking handle, allowing adjustment of the locking and unlocking timing during assembly. This invention reduces the manufacturing precision requirements of components while improving the assembly pass rate, significantly reducing manufacturing costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an adjustable locking and unlocking mechanism for manual shotguns, thereby reducing the manufacturing cost of manual shotguns and their locking and unlocking mechanisms.

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

[0005] An adjustable locking / unlocking mechanism for a manual shotgun includes a receiver, a barrel mount, and a trigger mount. The barrel mount is hinged to the front end of the receiver, and the trigger mount is fixed to the rear end of the receiver.

[0006] The receiver has a longitudinally arranged receiver guide groove along its inner edge. A locking block is slidably fitted into the receiver guide groove. A recoil spring is provided between the locking block and the trigger seat. A slot is provided at the rear end of the barrel seat. In the locked state, the front end of the locking block engages with the slot of the barrel seat. A barrel seat ramp is provided at the bottom of the rear end of the barrel seat. A front ramp is provided at the upper part of the front end of the locking block. When the barrel seat is engaged, the front ramp of the locking block engages with the ramp of the barrel seat, causing the locking block to compress the recoil spring and slide into the slot of the barrel seat.

[0007] The upper rear end of the receiver has a receiver positioning hole, and an unlocking lever is fitted inside the receiver positioning hole. The upper end of the unlocking lever is a handle, which is located above the receiver. The bottom of the unlocking lever has an unlocking lever, and the upper end of the locking block has a clearance groove corresponding to the unlocking lever. The bottom of the unlocking lever has a transverse unlocking lever tooth, and the unlocking lever has a transverse unlocking lever tooth. The unlocking lever tooth and the unlocking lever tooth mesh. The unlocking lever has a longitudinal slot, through which a screw passes and threadedly engages with the unlocking lever, allowing adjustment of the longitudinal position of the unlocking lever. The transverse ends of the unlocking lever have rearward protrusions, and the clearance groove of the locking block has a rear inclined surface of the locking block, allowing the unlocking lever to rotate. The protrusions at both ends of the unlocking lever are used to press the rear inclined surface of the locking block backward, causing the locking block to disengage from the slot of the barrel seat, thus unlocking the receiver.

[0008] Preferably, the front end of the receiver body is provided with a receiver body pivot hole along the transverse direction, a connecting pivot is installed in the receiver body pivot hole, and the front end of the barrel seat is provided with a hinge groove, which is hinged to the connecting pivot.

[0009] Preferably, the rear end face of the casing is provided with a casing reset fork threaded hole. A reset fork, a reset fork spring, and a reset fork guide nut are sequentially inserted into the casing reset fork threaded hole. The front end of the reset fork is provided with a concave arc-shaped fork head, and the rear end of the unlocking lever is provided with an arc-shaped groove. The fork head of the reset fork slides in conjunction with the arc-shaped groove of the unlocking lever, and the reset fork vertically limits the unlocking lever. The two side walls of the arc-shaped groove cooperate with the fork head of the reset fork to limit the limit position of the unlocking lever to rotate to both sides. The limit position of the unlocking lever corresponds to the unlocked state. The reset fork guide nut is threaded in the casing reset fork threaded hole.

[0010] Preferably, in the locked state, the handle portion of the unlocking lever extends rearward.

[0011] Preferably, the trigger housing is provided with a forward-extending mounting rod, and the recoil spring is positioned on the mounting rod.

[0012] Preferably, when the barrel is open, the cylindrical portion below the unlocking lever limits the front limit position of the locking block; when the barrel is locked, the barrel seat hook portion limits the front limit position of the locking block.

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

[0014] 1. The casing has no protrusions at the rear, resulting in a compact structure and reduced manufacturing costs.

[0015] 2. It can adjust the toothed engagement relationship between the unlocking lever and the unlocking rod, thereby adjusting the gap between the unlocking rod and the locking block, which improves the assembly qualification rate and reduces production costs. Attached Figure Description

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

[0017] Figure 2 This is a diagram showing the locked state of the manual shotgun of the present invention.

[0018] Figure 3 This is a diagram showing the left unlocked state of the manual shotgun of the present invention;

[0019] Figure 4 This is a diagram showing the right-hand unlocked state of the manual shotgun of the present invention;

[0020] Figure 5 This is a schematic diagram illustrating the working principle of the manually operated shotgun in its locked state according to the present invention.

[0021] Figure 6This is a diagram of the unlocking lever of the present invention;

[0022] Figure 7 This is a diagram of the unlocking lever of the present invention;

[0023] Figure 8 This is a diagram showing the combination of the unlocking handle and the unlocking lever of the present invention;

[0024] Figure 9 This is a diagram of the locking block of the present invention;

[0025] Figure 10 This is a diagram of the casing of the present invention;

[0026] Figure 11 This is a diagram of the receiver of a traditional bolt-action shotgun.

[0027] Figure Labels

[0028] In the attached diagram, 1. Barrel; 2. Barrel seat; 3. Receiver body; 4. Unlock lever; 5. Reset fork; 6. Reset fork spring; 7. Reset fork guide nut; 8. Trigger seat (partial); 9. Recoil spring; 10. Locking block; 11. Unlock lever; 12. Washer; 13. Screw; 14. Connecting shaft; 201. Barrel seat bevel; 301. Receiver body positioning hole; 302. Receiver body guide rail groove; 303. Receiver body shaft hole; 304. Receiver body reset fork threaded hole; 401. Unlock lever tooth profile; 1001. Locking block front bevel; 1002. Locking block rear bevel; 1101. Protrusion; 1102. Unlock lever tooth profile. Detailed Implementation

[0029] The working principle and structure of the present invention are further explained below with reference to the embodiments and accompanying drawings.

[0030] An adjustable locking and unlocking mechanism for a manual shotgun includes a receiver 3, a barrel mount 2, and a trigger mount 8. The barrel mount 2 is hinged to the front end of the receiver 3, and the trigger mount 8 is fixed to the rear end of the receiver 3. The front end of the receiver 3 has a receiver pivot hole 303 along the transverse direction, and a connecting pivot 14 is installed in the receiver pivot hole 303. The front end of the barrel mount 2 has a hinge groove, and the hinge groove is hinged to the connecting pivot 14.

[0031] The receiver body 3 has a longitudinally arranged receiver body guide groove 302 along its inner edge. A locking block 10 is slidably fitted into the receiver body guide groove 302, and the receiver body guide groove 302 limits the front limit position of the locking block 10. A recoil spring 9 is provided between the locking block 10 and the trigger seat 8. A forward-extending mounting rod is provided on the trigger seat 8, and the recoil spring 9 is positioned on the mounting rod. A slot is provided at the rear end of the barrel seat 2. In the locked state, the front end of the locking block 10 engages with the slot of the barrel seat 2. A barrel seat ramp 201 is provided at the bottom of the rear end of the barrel seat 2, and a front ramp 1001 is provided at the upper front end of the locking block 10. When the barrel seat 2 is engaged, the front ramp 1001 of the locking block engages with the ramp 201 of the barrel seat, causing the locking block 10 to compress the recoil spring 9 and slide into the slot of the barrel seat 2.

[0032] The upper rear end of the casing 3 is provided with a casing positioning hole 301. An unlocking lever 4 is fitted inside the casing positioning hole 301. The upper end of the unlocking lever 4 is a handle portion, located above the casing 3. An unlocking lever 11 is provided at the bottom of the unlocking lever 4. A clearance groove is provided at the upper end of the locking block 10 corresponding to the unlocking lever 11. A transverse unlocking lever tooth 401 is provided at the bottom of the unlocking lever 4, and a transverse unlocking lever tooth 1102 is provided on the upper part of the unlocking lever 11. The unlocking lever tooth 401 and the unlocking lever tooth 1102 mesh. The unlocking lever 11 has a longitudinal slot, which is fixed to the unlocking handle 4 by a screw 13 through the slot and threadedly engaged. The longitudinal position of the unlocking lever 11 can be adjusted. The two transverse ends of the unlocking lever 11 are respectively provided with rearward protrusions 1101. The clearance groove of the locking block 10 is provided with a rear inclined surface 1002 of the locking block. The unlocking handle 4 is used to drive the unlocking lever 11 to rotate. The protrusions 1101 at both ends of the unlocking lever 11 are used to press the rear inclined surface 1002 of the locking block backward, so that the locking block 10 is disengaged from the slot of the barrel seat 2, thereby unlocking.

[0033] The rear end face of the casing 3 is provided with a casing reset fork threaded hole 304. A reset fork 5, a reset fork spring 6, and a reset fork guide nut 7 are sequentially inserted into the casing reset fork threaded hole 304. The front end of the reset fork 5 has a concave arc-shaped fork head, and the rear end of the unlocking lever 4 has an arc-shaped groove. The fork head of the reset fork 5 slides in conjunction with the arc-shaped groove of the unlocking lever 4, vertically limiting the unlocking lever 4. The two side walls of the arc-shaped groove engage with the fork head of the reset fork 5, limiting the maximum rotational position of the unlocking lever 4 to both sides. The maximum position of the unlocking lever 4 corresponds to the unlocked state. The reset fork guide nut 7 is threaded into the casing reset fork threaded hole 304. In the locked state, the handle portion of the unlocking lever 4 extends rearward.

[0034] Specifically:

[0035] like Figure 1An adjustable locking and unlocking mechanism for a manual shotgun includes a receiver 3, an unlocking lever 4, a reset fork 5, a reset fork spring 6, a reset fork guide nut 7, a locking block 10, a recoil spring 9, an unlocking lever 11, a barrel seat 2, and a connecting shaft 14. The unlocking lever 4 is mounted on the receiver 3 via a positioning hole 301 and is reset and limited vertically by the reset fork 5. The locking block 10 is mounted in a guide groove 302 of the receiver 3, with the recoil spring 9 mounted behind it. The unlocking lever 11 engages with the teeth of the unlocking lever 4 via teeth; the engagement can be adjusted to regulate the gap between the unlocking lever and the locking block. It is then assembled with the unlocking lever 4 using screws 13 and washers 12. The receiver 4 is the basic structure for mounting the unlocking lever, reset fork, locking block, and connecting shaft.

[0036] The positioning hole 301 of the casing of the present invention is used to install the unlocking handle 4, the guide rail groove 302 is used to install the locking block 10, the rotating shaft hole 303 is used to install the connecting rotating shaft, and the threaded hole 304 is used to install the reset shift fork guide nut.

[0037] The unlocking lever and unlocking rod have an adjustable serrated structure and a threaded connection. This mechanism utilizes the toothed engagement structure of the unlocking lever and unlocking rod to adjust the timing of unlocking and locking during assembly. When unlocking, rotating the unlocking lever with your finger causes the locking block to release the lock on the barrel seat. When locking, the energy from manually rotating the barrel forces the locking block open through the barrel seat. After the gun body is rotated to the next position, the locking block resets and locks the barrel seat under the force of the recoil spring.

[0038] The opening and closing process of this invention is as follows:

[0039] To unlock, turn the unlocking lever 4 to the left or right (e.g., Figure 3 , Figure 4 This causes the unlocking lever 11 to rotate, pushing the locking block 10 backward on its right or left protrusion 1101. After the locking block has moved a certain distance, it releases the barrel seat, allowing the barrel to be unlocked by manually rotating it. (When locked...) Figure 5 Hold and rotate the barrel, using the barrel seat ramp 201 to push open the locking block ramp 1001. When the barrel seat is completely pushed open, the locking block returns to its original position under the force of the recoil spring 9 and locks the barrel seat, thus completing the locking.

[0040] 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. An adjustable locking and unlocking mechanism for a manual shotgun, comprising a receiver, a barrel mount, and a trigger mount, wherein the barrel mount is hinged to the front end of the receiver and the trigger mount is fixed to the rear end of the receiver, characterized in that: The receiver has a longitudinally arranged receiver guide groove along its inner edge. A locking block is slidably fitted into the receiver guide groove. A recoil spring is provided between the locking block and the trigger seat. A slot is provided at the rear end of the barrel seat. In the locked state, the front end of the locking block engages with the slot of the barrel seat. A barrel seat ramp is provided at the bottom of the rear end of the barrel seat. A front ramp is provided at the upper part of the front end of the locking block. When the barrel seat is engaged, the front ramp of the locking block engages with the ramp of the barrel seat, causing the locking block to compress the recoil spring and slide into the slot of the barrel seat. The upper rear end of the receiver has a receiver positioning hole, and an unlocking lever is fitted inside the receiver positioning hole. The upper end of the unlocking lever is a handle, which is located above the receiver. The bottom of the unlocking lever has an unlocking lever, and the upper end of the locking block has a clearance groove corresponding to the unlocking lever. The bottom of the unlocking lever has a transverse unlocking lever tooth, and the unlocking lever has a transverse unlocking lever tooth. The unlocking lever tooth and the unlocking lever tooth mesh. The unlocking lever has a longitudinal slot, through which a screw passes and threadedly engages with the unlocking lever, allowing adjustment of the longitudinal position of the unlocking lever. The transverse ends of the unlocking lever have rearward protrusions, and the clearance groove of the locking block has a rear inclined surface of the locking block, allowing the unlocking lever to rotate. The protrusions at both ends of the unlocking lever are used to press the rear inclined surface of the locking block backward, causing the locking block to disengage from the slot of the barrel seat, thus unlocking the receiver.

2. The adjustable locking and unlocking mechanism for a manual shotgun according to claim 1, characterized in that: The front end of the receiver body has a receiver body pivot hole along the lateral direction. A connecting pivot is installed in the receiver body pivot hole. The front end of the barrel seat has a hinge groove, which is hinged to the connecting pivot.

3. The adjustable locking and unlocking mechanism for a manual shotgun according to claim 1, characterized in that: The rear end face of the casing is provided with a reset fork threaded hole. A reset fork, a reset fork spring, and a reset fork guide nut are sequentially inserted into the reset fork threaded hole. The front end of the reset fork is provided with a concave arc-shaped fork head. The rear end of the unlocking lever is provided with an arc-shaped groove. The fork head of the reset fork slides into the arc-shaped groove of the unlocking lever. The reset fork vertically limits the unlocking lever. The two side walls of the arc-shaped groove cooperate with the fork head of the reset fork to limit the limit position of the unlocking lever to rotate to both sides. The limit position of the unlocking lever corresponds to the unlocked state. The reset fork guide nut is threaded into the reset fork threaded hole of the casing.

4. The adjustable locking and unlocking mechanism for a manual shotgun according to claim 1 or 3, characterized in that: In the locked position, the handle of the unlocking lever extends backward.

5. The adjustable locking and unlocking mechanism for a manual shotgun according to claim 1, characterized in that: The trigger housing has a forward-extending mounting rod, and the recoil spring is positioned on the mounting rod.

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