Bump Fire Grip Sliding Shaft Mechanism
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Solution Overview
Problem
Semi-automatic pistol users face challenges in achieving rapid and accurate firing due to the need for manual trigger squeezing, and existing bump firing techniques compromise accuracy and safety, especially when attempting to replicate automatic firearm capabilities.
Innovation Solution
A bump fire device for pistols featuring a partially hollow exterior shaft with a sliding interior shaft and a locking mechanism, allowing for forward force to engage the trigger without losing control, while maintaining position during recoil, and enabling seamless transition between bump firing and conventional firing modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional manual trigger squeezing is used for semi-automatic firearms, then firing accuracy is maintained, but rapid successive firing is limited by operator speed
Solution Approach 1:
The patent introduces a bump fire device as an intermediary mechanism between the operator and the trigger. This device includes a trigger actuator that can be pushed by the operator's thumb or finger, which then mechanically actuates the trigger. The intermediary mechanism translates simple linear pushing motion into precise trigger activation, enabling rapid firing while maintaining control through the mechanical linkage rather than direct manual squeezing.
2Productivity
If crude bump firing techniques are used (pushing weapon against trigger finger or using belt loop), then rapid firing is achieved, but accuracy decreases and safety risks increase from hot gas exposure
Solution Approach 1:
The bump fire device is segmented into distinct functional components: a grip portion that maintains weapon control, a trigger actuator that activates the trigger, and a trigger finger rest that positions the finger. This segmentation allows each component to perform its specific function optimally - the grip maintains stable positioning away from hot gases, the actuator provides controlled trigger activation, and the finger rest ensures proper finger placement without exposure to discharged chambers.
Solution Approach 2:
The device acts as an intermediary that mediates between the operator's hand and the trigger mechanism. Instead of directly pushing the weapon against the finger (which exposes the hand to hot gases), the operator pushes the trigger actuator through the protected grip structure. The intermediary design channels the firing force through the grip's internal mechanism, keeping the operator's hand in a safe position while still enabling rapid fire.
3Productivity
If one-handed gripping is used for bump firing, then rapid firing capability is achieved, but weapon control stability decreases
Solution Approach 1:
The bump fire device incorporates dynamic elements that adapt to the operator's movements. The trigger actuator is designed to move freely within the grip structure, allowing it to follow the natural recoil and movement of the weapon during firing. The internal linkage mechanisms dynamically adjust to maintain proper trigger engagement throughout the weapon's motion cycle, ensuring stable control even during rapid successive shots and recoil.
Data Source
AI summary
A pistol grip that assists in bump firing a pistol is disclosed. The bump fire grip may comprise a partially hollow exterior shaft that can contain an interior shaft. The interior shaft can be sized to slide from the front to the back of the exterior shaft, and vice versa. The interior shaft can slide on one or more pins, wherein the pins are lockedly engaged in the exterior shaft, pass through the interior shaft, but are not attached to the interior shaft. The bump fire grip can also employ a male/female grove design such that male groves on the exterior shaft can receive female groves on the interior shaft. The interior shaft can slide on the male/female groves. The bump fire grip can also include a locking mechanism, which, when engaged, can prevent the interior shaft from sliding within the exterior shaft, prohibiting bump firing.