Handgun Forearm Support Transferring Recoil to Shoulder
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Solution Overview
Problem
Small firearms, particularly handguns, experience significant recoil forces and muzzle rise, which reduce accuracy and make it difficult to engage targets, as all recoil forces are transferred to the shooter's hand muscles without a shoulder stock, leading to instability and accuracy issues.
Innovation Solution
A forearm support device with a U-shaped proximal portion and a distally-extending arm portion, adjustable via an intermediate joint member, is used to attach to the shooter's forearm, absorbing recoil forces and maintaining handgun stability through a grip adaptor and locking mechanism, thereby reducing muzzle rise and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a wrist wrap or wrist band is used to steady the hand, then the wrist can be kept in a fixed position and aim can be steadied, but the wrist muscles cannot absorb all recoil forces and muzzle rise still occurs
Solution Approach 1:
The patent introduces a forearm support device as an intermediary between the handgun and the shooter's body. The device includes a forearm brace that engages the forearm and a grip adaptor that connects to the handgun grip, creating a mechanical linkage that transfers recoil forces from the hand to the forearm and ultimately to the shoulder, preventing muzzle rise while maintaining wrist stability.
Solution Approach 2:
The patent transitions from a two-dimensional wrist wrap to a three-dimensional forearm support structure. The forearm brace extends along the forearm dimension, with a U-shaped proximal portion that can engage different positions on the forearm, and a distally-extending arm portion that connects to the grip adaptor, creating a spatial framework that distributes recoil forces across multiple dimensions.
2Object-generated harmful factors
If a forearm brace directly engages the forearm, then recoil forces can be transferred to the arm, but the device complexity increases with adjustable joints and locking mechanisms
Solution Approach 1:
The patent divides the forearm support device into distinct functional segments: a U-shaped proximal portion for forearm engagement, a distally-extending arm portion for structural support, an intermediate joint member for angular adjustment, and a grip adaptor for handgun attachment. Each segment can be independently manufactured and assembled, reducing overall complexity while maintaining functionality.
Solution Approach 2:
The patent incorporates a dynamic intermediate joint member that allows angular orientation adjustment between the arm portion and the grip adaptor. This adjustable joint can be locked into desired positions, enabling the device to adapt to different shooter anatomies and firing conditions while maintaining a relatively simple overall structure.
3Force
If the barrel axis lies above the center axis of the arm, then a twisting moment occurs at the wrist, but the wrist muscles cannot absorb all impact recoil forces
Solution Approach 1:
The patent creates a counterbalancing structure through the forearm brace and grip adaptor assembly. The U-shaped proximal portion engages the forearm in a position that creates a mechanical counter-moment to offset the twisting moment caused by the barrel axis being above the arm center axis. This distributes the rotational force across the forearm and shoulder, preventing wrist muscle overload.
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
The forearm support device stabilizes the handgun by transferring recoil forces to the forearm, reducing muzzle rise and enhancing shooting accuracy by maintaining the handgun's stability during firing.
Implementation Method 1
A compressible pad (138) is fixed to the U-shaped proximal portion (137)
Data Source
AI summary
A handgun forearm support suitable, for example, for target and competitive handgun shooting, includes a grip adaptor configured to engage the grip of a handgun, an intermediate joint member that attaches to a proximal end of the grip adaptor with a pivot assembly, and a forearm brace that rotatably and lockably engages a proximal end of the intermediate joint member. Preferably the locking engagement is hand-operable, for example a joint having mating parts with interlocking radial teeth, with a wing nut and bolt engagement. The grip adaptor may insert into a recess in the handgun grip, or engage the sides of the handgun grip. One or more removably locking pins or screws lock the handgun to the grip adaptor.