Pistol Firing Device Lateral Spring Segmentation
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Solution Overview
Problem
Current pistol percussion devices face issues with clogging, blockages, and limited energy storage due to the concentric arrangement of the percussion spring, which compromises between spring length and stress, affecting reliability and size constraints.
Innovation Solution
The use of two symmetrically arranged springs parallel to the striker's axis, with recesses to accommodate them, allows for reduced spring length and stress, enhancing energy storage and reliability, while a lighter striker and polymer housing reduce weight and complexity, and a cylindrical guide ensures proper movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single concentric spring is used to actuate the firing pin, then the device occupies less space, but the spring is subjected to high cyclic stresses causing fatigue failures and limited energy storage
Solution Approach 1:
The single concentric spring is divided into multiple lateral springs (typically two or four) arranged around the firing pin axis. Each spring operates independently with reduced cyclic stress, eliminating fatigue failures while collectively providing sufficient energy storage for reliable firing.
Solution Approach 2:
The spring arrangement transitions from a single-axis concentric configuration to a multi-axis lateral configuration around the firing pin. This dimensional change distributes stress across multiple springs and allows greater total energy storage without increasing the longitudinal profile of the device.
2Use of energy by moving object
If a longer spring is used to store more energy, then energy storage increases, but the slide elongation increases
Solution Approach 1:
The spring force is applied laterally rather than concentrically, changing the direction of force application. This allows the springs to be shorter in length while still providing adequate energy storage, as the lateral arrangement optimizes the force vector relative to the firing pin motion.
Solution Approach 2:
Multiple shorter springs arranged laterally provide the same or greater total energy storage as a single long concentric spring. The segmented configuration reduces the individual spring length requirements and consequently the overall slide length.
3Strength
If a heavier firing pin is used, then the device is more robust, but the force required for rearming increases and ergonomics deteriorate
Solution Approach 1:
The load of the firing pin is distributed across multiple lateral springs rather than a single spring. This segmentation of the support system allows for a lighter firing pin mass while maintaining robustness through the combined support of multiple springs, reducing rearming effort and improving ergonomics.
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 configuration increases the stored energy, reduces fatigue, improves ergonomics, and lowers the cost of the slide by eliminating costly machining, while maintaining reliable firing and reducing the force required for rearming.
Implementation Method 1
at least two firing pin springs (4,6) arranged symmetrically on either side of the axis of the firing pin (20)... said at least two springs whose respective axes are parallel to each other, are compression type springs
Data Source
Figure 1~2
Figure 3~4
AI summary
The present invention relates to a pistol comprising a firing device arranged in a slide (5), the device comprising a firing pin (1) comprising a firing pin head (9), characterised in that said device comprises at least two firing pin springs (4, 6) which are parallel and arranged laterally along the axis (20) of the firing pin and bear against at least two bearing surfaces (12) arranged perpendicular to the axis (20) of the firing pin (1).