Electronic Trigger Apparatus with Adjustable Resistance Stages
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Solution Overview
Problem
Existing electronic trigger apparatus for firearms lack the increased trigger pull resistance provided by mechanical two-stage triggers, leading to potential unintentional discharges due to low resistance and vulnerability to external vibrations, and do not accommodate the need for precise and rapid shooting requirements in sport rifles.
Innovation Solution
An electronically activated two-stage trigger apparatus with an adjustable trigger spring and self-balancing mechanism, incorporating a sensor to detect deflection and generate a signal for discharge only when a predetermined threshold is met, decoupling the trigger from external forces and providing distinct resistance stages without increasing the first travel path length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If electronic trigger apparatus is used to reduce the duration between consecutive discharges, then productivity is improved, but trigger pull resistance becomes too low causing safety issues
Solution Approach 1:
The trigger apparatus is divided into two distinct stages: a first trigger path with lower resistance for rapid reset and a second trigger path with higher resistance for safe discharge. This segmentation allows the system to provide both fast consecutive shots and adequate safety resistance by separating the functions into distinct operational phases.
Solution Approach 2:
The trigger apparatus dynamically adjusts resistance based on the operational stage. During the first trigger path, resistance is kept low for rapid operation, while during the second trigger path, resistance increases to provide safety. This dynamic adjustment resolves the contradiction between speed and safety.
2Reliability
If mechanical two-stage trigger is used to provide increased trigger pull resistance, then safety is improved, but the trigger must be released to a predetermined position interrupting the shooting
Solution Approach 1:
The trigger path is segmented into two stages: a first stage that allows rapid movement without full resistance for quick reset, and a second stage that provides increased resistance for safe discharge. This segmentation eliminates the need to release the trigger completely while maintaining safety through the resistance threshold.
Solution Approach 2:
The trigger can remain engaged throughout the shooting sequence, moving continuously between the two stages without requiring release to a predetermined position. The first stage enables rapid reset while the second stage ensures safe discharge, maintaining continuous useful action without interruption.
3Ease of operation
If electronic trigger apparatus with low resistance is used, then ease of operation is improved, but the firearm may be discharged unintentionally due to external vibrations
Solution Approach 1:
The trigger resistance is segmented into two stages: a first stage with lower resistance for ease of operation and rapid reset, and a second stage with higher resistance that acts as a threshold against external vibrations. This segmentation allows easy operation while protecting against unintentional discharge from vibrations.
Solution Approach 2:
The resistance dynamically changes based on the trigger path stage. During normal operation, low resistance provides ease of use, but when the second stage is engaged, resistance increases to filter out vibration-induced signals, dynamically adapting to operational needs.
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 solution enables precise and rapid shooting by providing adjustable resistance stages, reducing the likelihood of unintentional discharges and allowing for consecutive shots without releasing the trigger, while maintaining firearm alignment, thus enhancing shooting accuracy and safety.
Implementation Method 1
a spring element is operatively coupled to the trigger apparatus to provide a restoring force
Implementation Method 2
a spring element is operatively coupled to the trigger apparatus to provide a restoring force
Implementation Method 3
a sensor is coupled to the spring element to detect a deflection of the spring element and generate a signal
Data Source
AI summary
Electronic trigger apparatus for use with firearms are described herein. An example electronic trigger apparatus described herein includes a trigger assembly having a trigger and trigger arm that is movable between a first position and a second position. A first biasing element biases the trigger in the first position and provides a first resistance to the trigger when the trigger moves between the first position and the second position. A switch element assembly has a spring element and a sensor operatively coupled to the spring element where the spring element provides a second resistance to the trigger as the trigger moves between a pressure-point position and the second position. The sensor detects a force or deflection imparted on the spring element by the trigger arm when the trigger is in the second position.