Firearm Trigger Sear Link Design for Smooth Pull and Setting Stability
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Solution Overview
Problem
Existing firearm triggers often suffer from difficulty in adjustment, lack of smooth feel, and safety concerns, particularly in the interaction between sear surfaces and connectors, leading to compromised accuracy and safety during firing.
Innovation Solution
A trigger assembly with a pivotally connected frame, sear elements, and a sear link mechanism, along with adjustable detent screws, allowing for tailored trigger pull and enhanced safety by preventing setting changes over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional trigger designs are used, then safety mechanisms are built-in, but the trigger pull is difficult and lacks smooth feel
Solution Approach 1:
The trigger system is divided into separate functional components: a trigger element for user operation, a sear element for holding the striker, and a safety element with independent movement. This segmentation allows each component to be optimized for its specific function - the trigger element for smooth operation and the safety element for reliable prevention of unwanted discharge.
Solution Approach 2:
A safety element acts as an intermediary between the trigger element and the sear element. This intermediary component must be deliberately moved by the user to release the sear, providing an additional layer of safety while maintaining smooth trigger operation through proper geometric design of the safety element's interaction surfaces.
2Adaptability or versatility
If non-adjustable triggers are used, then the design is simple, but the trigger cannot be tailored to user needs
Solution Approach 1:
Adjustment screws are pre-installed on the trigger assembly, allowing users to pre-adjust the trigger pull weight and other parameters before use. This preliminary adjustment capability enables customization without adding complex adjustment mechanisms during operation, maintaining simplicity while providing adaptability.
3Adaptability or versatility
If adjustable triggers are used, then user needs can be met, but adjustment screws may walk off their setting
Solution Approach 1:
The adjustment screws are designed with features that enable users to easily adjust and lock the settings without requiring additional tools or complex procedures. The self-adjusting mechanism includes built-in locking features that prevent the screws from walking off their settings during normal operation, ensuring both customization and setting stability.
Data Source
AI summary
A trigger element moves between a released position and an actuated position, and a first sear element is pivotally connected to the frame and having a striker engagement surface. The first sear element moves between a position where the striker engagement surface restrains the striker in the cocked position, and one where the striker is enabled to move to the firing position. A sear link element operably connected to the trigger element and to the first sear element is movable between a restrained position where the trigger element is in a released position and prevents link movement, and in which the link restrains the first sear element, and a released position where the trigger element is in the actuated position, enabling link movement. Additionally, the link enables movement of the first sear element to the released position. Detent screws allow for tailoring aspects of the trigger pull.