Trigger Actuator for Firearm with Remote Switch Control
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Solution Overview
Problem
Individuals with paralysis or limited upper extremity control face challenges in accurately shooting firearms due to the requirement of fine motor skills for trigger pulling, which can be addressed by employing a remote trigger pulling mechanism using machine actuation.
Innovation Solution
A device comprising an actuator, controller, and switch that allows for remote trigger activation, where the actuator is mounted adjacent to the trigger, controlled by a microprocessor, and activated through a pressure-sensitive switch, enabling the use of diaphragm muscle groups to pull the trigger, with a two-step process for staging and pulling the trigger.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual trigger pulling is used, then fine motor skills are required for accurate shooting, but individuals with paralysis or limited upper extremity control cannot perform this action
Solution Approach 1:
The patent introduces an intermediary device consisting of an actuator, controller, and switch that mediates between the user's limited motor control and the firearm's trigger mechanism. The actuator physically contacts and pulls the trigger, while the controller processes signals from the switch to coordinate the pulling action, enabling individuals with paralysis to operate the firearm accurately without direct manual manipulation of the trigger
Solution Approach 2:
The patent replaces the direct mechanical manual trigger pulling action with an automated mechanical actuation system. The actuator, controlled by electrical signals from the controller based on switch activation, substitutes for the human hand's mechanical action, transforming the operation from direct manual control to indirect automated mechanical control that can be operated with limited motor skills
2Ease of operation
If remote trigger pulling mechanism is used, then fine motor skills are not required, but the complexity of the device increases
Solution Approach 1:
The patent segments the trigger activation function into distinct modular components: a switch for signal input, a controller for signal processing and command generation, and an actuator for physical trigger manipulation. This segmentation allows each component to perform its specific function independently, simplifying the overall system architecture and enabling targeted selection of component complexity based on user needs
Solution Approach 2:
The controller serves multiple functions within the system: it receives and processes signals from the switch, determines appropriate trigger activation timing, generates commands for the actuator, and can implement safety logic. This multi-functionality reduces the need for separate dedicated components for each function, thereby managing device complexity while maintaining comprehensive control capabilities
3Productivity
If the actuator moves into engagement with the trigger, then the trigger can be pulled, but the trigger must be allowed to reset by moving the actuator out of engagement
Solution Approach 1:
The patent implements periodic action through the cyclic engagement and disengagement of the actuator with the trigger. The controller manages this periodic cycle by activating the actuator to pull the trigger, then deactivating it to allow reset, creating a rhythmic pattern of fire-ready-states that enables sustained shooting while ensuring proper trigger reset timing between shots
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 individuals with limited motor skills to accurately and safely shoot firearms by allowing remote trigger activation, improving accuracy and reducing the risk of accidental discharge through controlled and timed trigger engagement.
Implementation Method 1
the switch comprises a pressure sensitive switch... the switch is adapted to transmit a first signal to the controller for causing the controller to transmit the first command to the actuator
Data Source
AI summary
A device for pulling the trigger of a firearm includes an actuator, a controller in signal communication with the actuator and a switch in communication with the controller. The actuator mounts on the firearm adjacent to the trigger. The actuator has a body movable into engagement with the trigger for pulling the trigger. The body is movable out of engagement with the trigger permitting the trigger to reset. The controller is adapted to transmit first and second commands to the actuator. The first command directs moving the body into engagement with the trigger, and the second command directs moving the body out of engagement with the trigger. The switch is adapted to transmit a first signal to the controller causing the controller to transmit the first command to the actuator, and a second signal to the controller for causing the controller to transmit the second command to the actuator.