Lock Release Lever Pin Assembly for Firearm Buttstock

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Solution Overview

Problem

The installation and removal of lock nut roll pins in adjustable buttstocks of firearms can be difficult and may cause damage to components, necessitating a more reliable and damage-free attachment mechanism for the adjustable buttstock release lever.

Innovation Solution

A lock release lever pin assembly featuring a lock release lever pin with insertion and retaining flat portions and a lock pin nut that engages the pin, allowing for easier assembly and disassembly by aligning internal protrusions with these flat portions, facilitating secure attachment without the need for a roll pin.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a lock nut roll pin is used to secure the release lever to the buttstock, then the attachment is secure and reliable, but the installation and removal become difficult and may cause damage to components

Engineering Contradiction:

Improveattachment securityVSAvoidinstallation and removal ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The lock pin nut is segmented with separate insertion flat portions and retaining flat portions on the lock release lever pin, allowing the attachment mechanism to be divided into distinct functional zones that enable easy installation and secure retention independently

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The flat portions on the lock release lever pin act as intermediaries between the lock pin nut and the pin shaft, providing engagement surfaces that facilitate both installation and secure retention without requiring forceful insertion or removal of the entire assembly

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If a lock nut roll pin is used to secure the release lever, then the connection is strong and secure, but the complexity of installation and removal increases

Engineering Contradiction:

Improveconnection strengthVSAvoidassembly complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The connection mechanism is segmented into distinct functional features (insertion flat portions for alignment and retention flat portions for locking), allowing each feature to perform its specific function independently and simplify the overall assembly process

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The flat portions on the lock release lever pin automatically align with corresponding features in the lock pin nut during installation, and the retaining flat portions self-lock into position, eliminating the need for complex alignment procedures or special tools

Inventive Principle:

Principle #25Self-service

3Reliability

If a roll pin is inserted through holes in the lock pin nut and lock release lever pin, then the components are securely fastened, but the risk of component damage during installation increases

Engineering Contradiction:

Improvefastening securityVSAvoidcomponent damage risk

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The harmful roll pin is extracted from the assembly, replacing it with a integrated lock pin nut design that achieves secure fastening through engagement features built into the nut and pin themselves, eliminating the need for separate roll pin insertion that causes damage

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The flat portions are pre-formed on the lock release lever pin during manufacturing, allowing proper alignment and engagement to occur automatically during installation without requiring forceful actions that could damage components

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10830558B2Buttstock lock release lever pin assembly

Publication Date: 2020.11.10 MEAN LLC

AI summary

A lock release lever pin assembly for an adjustable buttstock assembly of a firearm, wherein the lock release lever pin assembly includes a lock release lever pin including a first end and a second end and a lock pin nut that engages the first end of the lock release lever pin. The first end of the lock release lever pin includes at least one insertion portion and at least one retaining portion.