Adjustable Ball Joint Butt Plate for Shoulder-Fired Firearms

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Solution Overview

Problem

Shoulder firearms cause significant recoil shock and imbalance during shooting, leading to reduced precision and comfort, with existing butt plates being either ineffective or requiring expensive customization and complex adjustments.

Innovation Solution

A butt plate system featuring a single ball joint that allows the butt plate to pivot around three orthogonal axes, providing customizable fit to the shooter's shoulder, distributing recoil force over a larger surface area and allowing easy locking into position.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a fixed butt plate is used, then the structure is simple and easy to manufacture, but the recoil force is not effectively distributed and shooting comfort is reduced

Engineering Contradiction:

Improveshooting comfortVSAvoidbutt plate structure

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The butt plate is made adjustable through a ball joint mechanism that allows pivoting around multiple axes, enabling the plate to adapt dynamically to different shooter shoulder positions and clothing conditions, thereby improving comfort without requiring complex custom manufacturing for each user

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If a custom-fit butt plate is manufactured, then shooting comfort and precision are improved, but the cost increases and requires skilled intervention

Engineering Contradiction:

Improveshooting precisionVSAvoidmanufacturing cost

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The butt plate system is divided into a standard base plate and an adjustable plate component that can be independently positioned using the ball joint mechanism, allowing users to achieve custom fit without requiring custom manufacturing of the entire assembly

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The butt plate position and orientation parameters can be adjusted by manipulating the ball joint, allowing the same standardized plate to adapt to different user measurements and clothing conditions, eliminating the need for expensive custom manufacturing for each user

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If multiple adjustable parts are used, then adaptability to different shooters is improved, but the adjustment system becomes complex and difficult to operate

Engineering Contradiction:

Improveadaptability to shooterVSAvoidadjustment complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

Multiple adjustment functions (pivoting around three orthogonal axes) are merged into a single ball joint mechanism, allowing comprehensive adaptability to different shooter positions and clothing conditions through one unified adjustment system rather than multiple separate adjustment mechanisms

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentEP2541188B1Stock with butt plate for a long gun

Publication Date: 2015.03.04 BROWNING INTERNATIONAL SA

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AI summary

Stock with butt plate for a shoulder-fired firearm, the stock (1) comprising a butt plate (5), characterized in that the butt plate (5) is mounted on the stock (1) by means (6) allowing the position of the butt plate (5) to be adapted vis-à-vis the stock (1) so as to be able to personalize the position of the butt plate (5) to the shooter relative to an average position in which the butt plate (5) is located mainly in line with the stock (1).