Sear Trip Bar for Compact Automatic Firearm
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Solution Overview
Problem
Compact firearms face challenges in achieving automatic firing capabilities due to increased platform scaling, particularly in reducing the distance between the bolt carrier and the automatic sear, which can lead to mechanical failure and complexity.
Innovation Solution
A sear trip bar is designed to operatively interface with the bolt carrier and automatic sear, transferring force to trip the sear and initiate subsequent firing cycles without releasing the trigger, reducing bolt bounce and maintaining a lightweight, compact firearm design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the distance between the bolt carrier and automatic sear is reduced to achieve compact firearm design, then the firearm size is reduced, but mechanical failure risk increases
Solution Approach 1:
The sear trip bar serves as an intermediary component between the bolt carrier and automatic sear. It transfers force from the bolt carrier to trip the automatic sear, enabling reliable automatic firing in compact configurations without direct contact between the bolt carrier and sear, thus reducing mechanical failure risk while maintaining compact size
2Adaptability or versatility
If automatic firing capabilities are added to compact firearms, then automatic fire function is achieved, but device complexity increases
Solution Approach 1:
The sear trip bar is designed as a separate, dedicated component that segments the automatic firing mechanism from the trigger system. This segmentation allows the automatic firing function to be added without complicating the existing trigger mechanism, reducing overall device complexity while achieving automatic fire capability
Solution Approach 2:
The sear trip bar acts as a mediator that simplifies the automatic firing mechanism by providing a dedicated force transfer path. Instead of complex direct interactions between multiple components, the trip bar mediates the force transfer from bolt carrier to automatic sear, reducing mechanical complexity
3Adaptability or versatility
If traditional sear tripping mechanisms are used, then automatic firing is achieved, but bolt bounce increases
Solution Approach 1:
The sear trip bar serves as an intermediary that decouples the bolt carrier's rearward motion from direct impact on the automatic sear. By using the trip bar to transfer force laterally at the rearward end, the system achieves automatic firing while minimizing harmful bolt bounce
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 sear trip bar enables reliable automatic firing in compact firearms by reducing mechanical complexity, minimizing added mass and bulk, and allowing for efficient operation in both automatic and semi-automatic modes, thus enhancing the firearm's reliability and cost-effectiveness.
Implementation Method 1
transferred the force of the moving bolt carrier during a given firing cycle to automatically trip the sear
Data Source
AI summary
A sear trip bar for use in an automatic firearm is disclosed. In accordance with some embodiments, the sear trip bar can be operatively interfaced with the bolt carrier and the automatic sear of the host firearm. The disclosed sear trip bar can be configured such that, upon sufficient displacement thereof (e.g., exhaustion of its stroke length) by the bolt carrier, the automatic sear may be caused to trip. Thus, the disclosed sear trip bar can be utilized, for example, to transfer the force of the moving bolt carrier during a given firing cycle to automatically trip the sear so as to initiate one or more subsequent firing cycles without having to release and again operate the trigger of the host firearm. The disclosed sear trip bar can be utilized, for example, in pistol-caliber and/or rifle-caliber automatic firearms.