Firearm Trigger Assembly Lock Preventing Accidental Discharge
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Solution Overview
Problem
Existing trigger safety devices for guns are easily manipulable, prone to detachment, and inconvenient for use in low-light conditions or with gloves, and do not adequately prevent accidental firing or damage from falls, especially for unauthorized users or children.
Innovation Solution
A trigger assembly with a hammer, interconnected sear elements, and a lock mechanism using springs and pins to selectively lock the trigger, requiring a key for operation and preventing accidental firing by applying pressure to the trigger, thus ensuring the gun remains in a no-fire position unless intentionally set to fire.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a manual safety lever or button is used to prevent accidental firing, then the device can be operated safely by responsible adults, but the device can be easily manipulated or defeated by unauthorized users or children
Solution Approach 1:
A trigger lock device is introduced as an intermediary component that physically blocks the trigger mechanism. This separate lock device must be engaged to prevent trigger operation, adding an intermediate step that defeats simple manipulation attempts while maintaining ease of use when properly locked
Solution Approach 2:
The safety system is segmented into two independent components: the original trigger mechanism and a separate trigger lock device. This segmentation allows the lock to function independently as an additional safety layer that cannot be defeated by manipulating the original trigger mechanism alone
2Reliability
If a separate trigger lock device is used to prevent unauthorized operation, then safety is improved, but the device can detach from the weapon and be misplaced or lost
Solution Approach 1:
The trigger lock device is merged with the weapon through attachment mechanisms (clamps, clips, or integration with the weapon's existing structure). This combining ensures the lock remains stably attached to the weapon during use and transport, preventing loss or misplacement while maintaining its protective function
3Reliability
If an attachable trigger lock device is used, then safety protection is provided, but the device must be stored somewhere when removed which can be bulky and uncomfortable
Solution Approach 1:
The trigger lock device is designed to attach permanently or semi-permanently to the weapon, merging the safety device with the weapon itself. This eliminates the need for separate storage containers or pockets, as the lock travels with the weapon and can be quickly engaged or disengaged when needed
Solution Approach 2:
The weapon itself serves as the storage location for the trigger lock device through integrated attachment points or compartments. The weapon provides its own storage solution, eliminating the need for external storage and reducing bulk and discomfort for the user
4Reliability
If a complex lock mechanism is used to prevent accidental discharge, then safety is improved, but the device complexity increases making it harder to operate with gloves or in low light
Solution Approach 1:
The complex locking mechanism is extracted from the main trigger assembly and placed on a separate, easily accessible part of the weapon. This allows the primary trigger to remain simple and easy to operate, while the separate lock mechanism can be designed with large, glove-friendly components that are visible and operable in low light conditions
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 effectively prevents accidental gun discharge and damage by ensuring the trigger can only be set to fire with deliberate action, providing enhanced user safety and remaining affixed to the gun, even when dropped or subjected to environmental challenges.
Implementation Method 1
a second spring connected to the lock element to overcome the energy of the first sear element to apply pressure to a trigger to lock the trigger
Implementation Method 2
a first sear element interconnected with the hammer by a first spring element
Data Source
AI summary
A trigger assembly prevents the rifle from being damaged and improves the user safety by preventing unintentional firing (rifle's falling down to the ground, hitting any place, etc.) as long as a trigger lever is not pulled by the user.