Spring Biased Locking Lever for Adjustable Firearm Butt Pad
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Solution Overview
Problem
Firearm stocks are typically fixed, leading to discomfort and unsafe shooting positions due to variations in user shoulder shape and clothing, and existing adjustment mechanisms are cumbersome and require tools, making them difficult to adjust under duress.
Innovation Solution
A length adjustable butt pad assembly with a spring biased locking lever that allows horizontal adjustment of the buttstock by rotating the butt plate shaft within a mounting tube, using locking notches and lugs to secure different positions, enabling easy and tool-free adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed stock position is used, then the structure is simple and reliable, but the user must acclimate to the position which causes discomfort and unsafe shooting due to variations in shoulder shape and clothing
Solution Approach 1:
The butt pad is designed with a shaft that can rotate within a mounting tube, transitioning from a fixed position to an adjustable position. The spring-biased locking lever enables the shaft to be rotated to different angular positions and locked in place, providing dynamic adaptability while maintaining structural integrity when locked.
Solution Approach 2:
The butt pad is divided into separable components: a mounting tube attached to the stock, a shaft that rotates within the tube, and a locking mechanism. This segmentation allows the adjustment function to be added without redesigning the entire stock structure.
2Ease of operation
If existing adjustment mechanisms are used, then stock position can be adjusted, but the adjustment requires manipulating unlocking elements and cannot be done without special tools or under duress
Solution Approach 1:
The locking lever is spring-biased and automatically engages with the shaft's groove to lock the shaft in position. To adjust, the user simply pulls the lever against the spring force and rotates the shaft to the desired position, where the spring automatically re-engages the locking mechanism. This eliminates the need for tools and simplifies the adjustment process.
Solution Approach 2:
The complex multi-step unlocking and adjustment mechanism is replaced with a simple spring-biased lever system that uses elastic force instead of mechanical locking pins or screws requiring tools. The spring force provides automatic engagement and disengagement capability.
3Ease of operation
If a spring biased locking lever mechanism is added, then tool-free adjustment is enabled, but the device complexity increases
Solution Approach 1:
The locking and adjustment functions are merged into a single integrated mechanism. The spring-biased locking lever simultaneously serves as both the locking element and the adjustment actuator, eliminating the need for separate locking pins, screws, or tool-operated mechanisms.
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
Enables convenient and quick adjustment of the firearm's stock position to improve comfort and safety by accommodating varying shoulder sizes and clothing conditions without the need for special tools, enhancing usability under duress.
Implementation Method 1
a spring biased locking lever to allow rotation of the shaft
Data Source
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AI summary
A length adjustable butt pad assembly for a firearm, the length adjustable butt pad assembly comprising a butt plate having an elongated butt plate shaft and a butt plate base comprising an elongated mounting tube extending in a horizontal direction and receiving said butt plate shaft. Said elongated butt plate shaft is rotatable in said mounting tube between a first locked position and a second released position, said second released position allowing an axial displacement of said elongated butt plate shaft between at least two fixed locations.