Compact Handgun Trigger Mechanism with Nested Springs
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Solution Overview
Problem
Existing handgun trigger mechanisms require significant space for separate mainsprings, limiting their compactness and making it difficult to achieve a pre-tensioning function with reduced trigger force.
Innovation Solution
The trigger mechanism integrates the pretensioning spring and trigger spring within the hammer, utilizing a control lever to manage the biasing spring and allowing for a compact design with low trigger operating force, where the trigger spring is coaxially arranged with the pretensioning spring and supported by guides and spacers for adjustable trigger characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If two separate mainsprings are arranged below the firing pin within the pistol grip, then sufficient ignition energy is provided, but the pistol requires significant space and compactness is limited
Solution Approach 1:
The patent combines the pretensioning spring and trigger spring into a single housing space within the hammer, whereas conventional designs use two separate mainsprings arranged below the firing pin. This merging of functions into one compact unit provides sufficient ignition energy while significantly reducing the space required in the pistol grip.
Solution Approach 2:
The trigger spring is arranged coaxially inside the pretensioning spring, creating a nested configuration. This nested arrangement allows both springs to occupy the same radial space within the hammer, maximizing space efficiency while maintaining the necessary elastic energy storage for ignition.
2Use of energy by moving object
If separate mainsprings are used for pretensioning and trigger function, then adequate ignition energy is achieved, but the trigger mechanism becomes complex and space-consuming
Solution Approach 1:
The patent merges the functions of pretensioning spring and trigger spring into a single integrated assembly within the hammer. This consolidation reduces the number of separate components and simplifies the overall trigger mechanism while maintaining adequate ignition energy through the coordinated action of both springs in the nested configuration.
3Volume of moving object
If the trigger spring is arranged inside the pretensioning spring coaxially, then maximum space savings are achieved, but the manufacturing precision requirements increase
Solution Approach 1:
The trigger spring is positioned coaxially within the pretensioning spring, creating a compact nested arrangement that maximizes space utilization in the hammer. This configuration requires precise manufacturing and assembly to ensure proper coaxial alignment, but achieves the goal of minimizing the overall volume of the trigger mechanism.
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
This design enables a compact and space-saving trigger mechanism that provides sufficient ignition energy with reduced trigger force, allowing for easy adjustment of trigger forces and characteristics without increasing the pistol's size.
Implementation Method 1
One of the two mainsprings serves as a pretensioning spring for storing pretensioning energy
Implementation Method 2
the second mainspring acting as a trigger spring is tensioned by means of the trigger and determines the trigger force
Data Source
Figure 1
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AI summary
The trigger mechanism has an impacting lever (2) for actuating a firing pin (6) and a pre-tension spring (13) arranged to the impacting lever. A trigger spring (14) is arranged to the impacting lever. A controlling lever (5) is provided for controlling the pre-tension spring and a trigger bar (8). The pre-tension spring and the trigger spring are accommodated in the impacting lever.