Trigger Pull Force Gauge With Segmented Load Cell
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Solution Overview
Problem
There is a need for an accurate and practical method to measure the trigger pull force of weapons, particularly firearms, to facilitate adjustments in trigger mechanisms for desired firing conditions.
Innovation Solution
A trigger gauge with a housing, an arm, and a load cell at the distal portion, which includes a trigger engagement head for measuring the pull force and displaying the value, allowing for precise measurement and adjustment of the trigger mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a trigger gauge is designed to be handheld and portable, then ease of operation and portability are improved, but measurement precision may be compromised due to smaller size and potential user handling variability
Solution Approach 1:
The device is segmented into distinct functional modules: a load cell for precise force measurement, an arm mechanism for trigger engagement, a display unit for readings, and a housing for portability. This segmentation allows each component to be optimized independently - the load cell can be high-precision while the housing remains compact and handheld-friendly.
Solution Approach 2:
The arm acts as an intermediary between the user's hand and the trigger, providing a stable, extended interface that maintains measurement precision while allowing handheld operation. The arm transmits force accurately from the trigger engagement point to the load cell, serving as a mechanical mediator that preserves measurement accuracy despite the portable form factor.
2Measurement precision
If the load cell is positioned at the distal portion of the arm spaced from the housing, then measurement accuracy is improved by isolating the sensing element, but device complexity increases
Solution Approach 1:
The load cell is integrated with the arm structure, merging the sensing element and the mechanical interface into a unified component. This combination simplifies the overall structure by eliminating separate mounting mechanisms while maintaining the spaced positioning needed for accurate measurement isolation.
Solution Approach 2:
The arm serves multiple functions: it provides structural support for the load cell, acts as the engagement interface with the trigger, and positions the sensing element at the optimal distance from the housing. This multi-functionality reduces device complexity by consolidating several roles into a single component.
3Ease of operation
If the arm is connected via a pivot connection allowing movement between deployed and stowed positions, then ease of operation and storage are improved, but reliability may be affected by moving parts
Solution Approach 1:
The pivot connection is designed with predetermined stop positions (deployed and stowed) that ensure the arm reaches exact, consistent locations. This preliminary positioning action guarantees that when deployed, the trigger engagement head is at the correct position and orientation for reliable, repeatable measurements, eliminating variability from improper positioning.
Solution Approach 2:
The pivot connection incorporates visual indicators (such as alignment marks or color-coded positions) that show when the arm is properly positioned in the deployed state. This visual feedback ensures consistent engagement geometry across multiple uses, maintaining reliability while allowing easy deployment and stowing operations.
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 users to accurately measure and adjust the trigger pull force, ensuring consistent and desired firing conditions, with the gauge being portable and easy to use.
Implementation Method 1
A load cell is located at the distal portion of the arm. The load cell includes a trigger engagement head configured for engaging the trigger. The load cell is operable to generate an electrical signal responsive to a force on the trigger engagement head for measuring the pull force of the trigger.
Data Source
AI summary
Trigger pull force gauge and methods of use. The trigger pull force gauge includes a housing and an arm extending therefrom. The trigger pull force gauge can include a load cell located at a distal portion of the arm spaced from the housing. The arm can be movable with respect to the housing for selectively positioning the arm in a deployed position and a stowed position with respect to the housing.