Bow Trigger with Adjustable Pressure Point for Variable Pull Weight
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Solution Overview
Problem
Trigger pull weight in existing rifles makes them inaccessible for some users, as it does not accommodate varying shooting styles or user capabilities effectively.
Innovation Solution
A two-stage trigger mechanism is introduced, where a bow trigger with a cylindrical housing partially filled with RTV silicone filler allows for adjustable trigger pull weight by changing the pressure point, transforming the rifle from a single stage fast shooting trigger to a slower two-stage trigger with reduced pull weight and increased travel distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a single stage fast shooting trigger is used, then shooting speed is improved, but trigger pull weight becomes too high for some users and reduces accessibility
Solution Approach 1:
The trigger mechanism is made dynamically adjustable through a movable pressure point system. The pressure point can be repositioned along the trigger assembly, allowing users to switch between a forward position for fast shooting (single-stage characteristics) and a rearward position for reduced pull weight (two-stage characteristics). This dynamic adjustment resolves the contradiction by enabling the trigger to adapt its performance characteristics based on user needs.
Solution Approach 2:
The invention changes key parameters of the trigger system - specifically trigger pull weight and travel distance - by repositioning the pressure point. When the pressure point is moved rearward, trigger pull weight decreases by approximately 65% and travel distance increases by approximately 150%, transforming the trigger from single-stage to two-stage operation. This parameter adjustment resolves the contradiction between shooting speed and accessibility.
2Ease of operation
If trigger pull weight is reduced for accessibility, then user accessibility is improved, but shooting speed and responsiveness may be compromised
Solution Approach 1:
The movable pressure point system allows users to dynamically adjust trigger characteristics. When accessibility is the priority, the pressure point can be positioned rearward to reduce pull weight. When shooting speed is prioritized, the pressure point moves forward to restore rapid trigger response. This dynamic adaptability resolves the contradiction between accessibility and shooting speed.
Solution Approach 2:
The trigger assembly is designed to perform multiple functions through a single mechanism. The same pressure point adjustment system provides both reduced pull weight for accessibility and maintained shooting speed when needed. This multi-functionality resolves the contradiction by enabling one trigger system to serve both accessibility-conscious users and speed-oriented shooters.
3Ease of operation
If a two-stage trigger with increased travel distance is used, then trigger pull weight is reduced, but the mechanism complexity increases
Solution Approach 1:
Rather than implementing a completely separate two-stage trigger mechanism, the invention uses a dynamic pressure point system that modifies the characteristics of an existing single-stage trigger. By moving the pressure point rearward, the system effectively creates two-stage behavior (first stage: breaking the light seal, second stage: triggering the sear) without requiring a complex dedicated two-stage mechanism. This approach reduces mechanism complexity while achieving reduced pull weight.
Solution Approach 2:
The pressure point acts as an intermediary element between the trigger pull and the sear engagement. By repositioning this intermediary, the system modifies the mechanical advantage and travel characteristics without requiring complex additional components. This intermediary approach achieves two-stage functionality with minimal added complexity.
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 users to switch between fast and slow shooting styles, reducing trigger pull weight by 65% and increasing travel distance by 150%, enhancing accessibility and accuracy by minimizing sear grind impact.
Implementation Method 1
A bow trigger extends through the trigger housing lower receiver portion and into the lower receiver. The bow trigger further comprises a cylindrical housing that is partially filled with a filler. Moving a pressure point up or down on the cylindrical housing effectively changes the rifle from a single stage style fast shooting trigger to a slower shooting long range two stage trigger with a lower trigger pull weight.
Data Source
AI summary
A rifle assembly for a two-stage trigger includes a rifle arranged with an upper receiver and a lower receiver. A pistol grip is joined to the lower receiver and further has a pistol grip lower edge. A trigger housing further has a trigger housing lower receiver portion immediately adjacent to the lower receiver. The trigger housing lower receiver portion is immediately adjacent to a trigger housing magazine well portion and a trigger housing pistol grip portion. A bow trigger extends through a trigger housing lower receiver portion and into the lower receiver. The bow trigger has a cylindrical housing that is partially filled with a filler. A trigger stub is centrally located in the cylindrical housing. Moving a pressure point up or down on the cylindrical housing effectively changes the rifle from a single stage style fast shooting trigger to a slower shooting long range two stage trigger with a lower trigger pull weight.