Polymer Charging Handle Assembly for Rifle Wear Reduction
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Solution Overview
Problem
Traditional rifle charging handles are complex and difficult to assemble/disassemble, with metal components that wear out the upper receiver and weaken the locking function over time, while existing 'latchless' designs also suffer from mechanical complexity.
Innovation Solution
A charging handle assembly using a polymer main body with a hook shape latch and secure screw attachment, reducing friction and wear on the upper receiver, and offering modular design options with polymer pieces for improved usability and cost-effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal latch and spring combination is used, then locking function is provided, but device complexity increases and assembly/disassembly becomes difficult
Solution Approach 1:
The patent removes the traditional metal latch and spring combination from the charging handle assembly. Instead, it uses a polymer integration approach where the polymer piece itself provides the latching function through its elastic deformation capability, eliminating multiple separate components and simplifying the overall structure.
Solution Approach 2:
The patent combines the latching function and the structural support function into a single polymer piece. The polymer piece integrates both the body structure and the latching mechanism, eliminating the need for separate latch and spring components while maintaining the locking function through the polymer's material properties.
2Force
If metal latch is used, then locking force is provided, but wear on upper receiver increases and locking function weakens over time
Solution Approach 1:
The patent uses polymer material instead of traditional metal for the charging handle body and latching mechanism. The polymer provides sufficient locking force through its elastic properties while being less abrasive to the upper receiver, reducing wear and maintaining reliable locking function over extended use.
Solution Approach 2:
The patent changes the material parameter from metal to polymer, which fundamentally alters the interaction characteristics with the upper receiver. The polymer's softer, more compliant nature reduces friction and wear on the receiver while maintaining adequate locking force through elastic deformation.
3Object-affected harmful factors
If polymer piece is used, then friction and wear on upper receiver are reduced, but manufacturing precision requirements increase
Solution Approach 1:
The patent applies polymer material specifically to the charging handle body and latching components that contact the upper receiver. This localized application of polymer provides wear reduction benefits at the critical interface while allowing other parts of the system to maintain traditional metal construction with established precision tolerances.
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 polymer-based design simplifies assembly, reduces wear on the upper receiver, and provides cost-effective replacement options, enhancing the durability and functionality of the latching mechanism.
Implementation Method 1
The hook shape latch is made to have limited elasticity for slidably hooking into a hole on an upper receiver of a rifle
Implementation Method 2
This reduces the friction between the metal (upper receiver and traditional charging handle latching), with a lower cost factor
Data Source
AI summary
Present invention discloses a rifle charging handle where one or two polymer pieces are made to fit over a T distal end of a main rigid body. A small protrusion on a hook shape latch, with limited elasticity, provides the locking mechanism to the upper receiver. The polymer pieces are secured by screws or other means; they provide a cost-effective option for ambidexterity variation and reduce metal wear on the upper receiver. The polymer pieces can also be secured to the main rigid body via a click-tab/click-hole mechanism. Other composite materials can be used to make the polymer pieces as long as they provide substantially similar rigidness and limited elasticity.