Linear Firearm Hammer Locking Mechanism for Assisted Ejection
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Solution Overview
Problem
Manual intervention is required after each shot to unlock and reload the movable assembly in linear cocking type firearms with assisted ejection, which complicates the reloading process and distinguishes these weapons from semi-automatic types.
Innovation Solution
The locking mechanism is simplified by using a dog that cooperates with the movable assembly, where the unlocking assembly, comprising an unlocking finger and notch, neutralizes the percussion system by disengaging the dog when manually operated, allowing assisted return and reloading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking means is placed at the rear of the moving assembly to prevent bypassing, then the security against bypassing is improved, but the device complexity increases due to additional locking components
Solution Approach 1:
The hammer serves multiple functions: it acts as both the percussion device for firing and the locking means to prevent bypassing. When engaged, the hammer's locking face contacts the moving assembly's locking surface to secure the rear position. This eliminates the need for separate dedicated locking components while maintaining security against bypassing.
Solution Approach 2:
The unlocking assembly integrates the unlocking finger and unlocking notch into a single functional unit. The unlocking finger with its complementary shape to the hammer's locking face combines the unlocking action with the neutralization of the percussion system, reducing the number of separate parts needed for the locking mechanism.
2Adaptability or versatility
If manual intervention is required to unlock the moving assembly after each shot, then the weapon remains in the repeating category, but the ease of operation deteriorates due to mandatory manual steps
Solution Approach 1:
The unlocking function is segmented into two independent actions: (1) the unlocking finger disengages the hammer from the moving assembly by contacting the unlocking notch, and (2) the moving assembly returns forward under spring assistance. This segmentation allows the unlocking mechanism to be simpler while maintaining the required manual intervention for repeating classification.
Solution Approach 2:
The unlocking finger acts as an intermediary element between the user's manual input and the hammer locking mechanism. By providing a dedicated unlocking notch on the hammer that receives the unlocking finger, the system creates a simple mechanical interface that enables manual unlocking without complex mechanisms.
3Reliability
If the unlocking assembly neutralizes the percussion system by disengaging the trigger, then the reliability against unauthorized firing is improved, but the device complexity increases due to additional neutralizing components
Solution Approach 1:
The unlocking finger is designed with a complementary shape to the hammer's locking face, merging the unlocking function with the percussion system neutralization into a single component. When the unlocking finger engages the unlocking notch, it simultaneously disengages the hammer from the moving assembly and prevents the hammer from striking the firing pin, neutralizing the percussion system without requiring separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution enables smoother and more efficient reloading by eliminating the need for manual intervention after each shot, maintaining the repeating firearm category while preventing shunting of the rear locking mechanism.
Implementation Method 1
recovering the energy resulting from the pressure exerted during the firing of a cartridge in order to move a moving assembly against an elastic return element
Implementation Method 2
a high-explosive composition in a cartridge case, comprising a nitrocellulose base and an oxidizer
Data Source
Figure 1~6
AI summary
Repeating firearm of the linear type with assisted ejection. The repeating firearm of the linear type, with assisted ejection, comprises: – means able to recuperate the energy resulting from the pressure applied when firing a munition (7) so as to move a mobile assembly against the action of an elastic return means and comprising a breech bolt, a latch and a firing pin collaborating with a hammer (5) operated by a trigger (6), – locking means locking the mobile assembly (4) at the rear, with the return spring in the compressed position, after each firing, – an unlocking assembly (12), actuatable by hand and able to act on the locking means to release the mobile assembly and allow the assisted return of said assembly with a view to reloading. The said firearm is characterized in that the locking means are made up of the hammer (5), which collaborates with the mobile assembly (4), to hold it at the rear.