Pistol Trigger Spring Compression Guide Pin Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing trigger slide springs in pistols have limitations in service life and potential weak points, necessitating a solution to enhance durability without increasing costs.
Innovation Solution
A helical compression spring is designed with a cross bolt at one end articulating in the frame and a hook-shaped end that engages with the trigger slide, providing a robust mechanism for the firing pin nose, replacing traditional tension springs and avoiding complex assembly issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional tension spring with bent ends is used for the trigger slide, then the assembly is relatively simple, but the service life is limited and weak points exist in the design
Solution Approach 1:
The patent inverts the traditional tension spring design by using a compression spring instead. The compression spring (12) is arranged around a guide pin (11) and acts in the opposite mechanical direction, converting the force application method from tension to compression, which eliminates the weak points associated with bent spring ends while extending service life.
Solution Approach 2:
The guide pin (11) serves as an intermediary element between the compression spring (12) and the trigger slide (3). The guide pin provides a stable articulation point with the cross bolt (10) in the frame (6) and supports the spring's movement, distributing forces evenly and eliminating the stress concentration points that would otherwise exist in the spring ends.
2Reliability
If a compression spring with guide pin and cross bolt is used, then service life is extended and weak points are eliminated, but the assembly complexity increases
Solution Approach 1:
The trigger spring mechanism is segmented into distinct functional components: the compression spring (12) for force generation, the guide pin (11) for movement guidance, and the cross bolt (10) for secure articulation in the frame (6). This segmentation allows each component to be optimized independently and assembled in a systematic manner, reducing overall assembly complexity despite the increased number of parts.
Solution Approach 2:
The guide pin (11) performs multiple functions simultaneously: it serves as the central axis around which the compression spring (12) is arranged, provides the articulation point for the cross bolt (10) in the frame (6), guides the movement of the trigger slide (3), and distributes mechanical forces evenly. This multi-functionality reduces the need for additional separate components, simplifying the overall assembly.
3Ease of operation
If the spring ends are bent into eyes for attachment, then assembly is straightforward, but potential weak points are created in the spring structure
Solution Approach 1:
Instead of creating bent eye ends on the spring which create stress concentration points, the patent inverts the attachment approach by using a compression spring that articulates with the frame (6) and trigger slide (3) through perpendicular surfaces and the guide pin (11) system. This eliminates the need for bent spring ends while maintaining secure attachment.
Solution Approach 2:
The patent extracts the problematic bent spring end design from the system and replaces it with a separate guide pin (11) and cross bolt (10) articulation mechanism. This removes the weak points from the spring structure itself while maintaining the necessary attachment functionality through the compression spring's perpendicular end surfaces.
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 new spring design enhances the service life of pistol components, simplifies assembly, and eliminates potential weak points, while maintaining cost-effectiveness by using a robust compression spring mechanism.
Implementation Method 1
a helical spring for the trigger slide (3), which supports the trigger movement against the force of a return spring and which engages with one end on the trigger slide (3)
Data Source
Figure 1~3
Figure 4~5
Figure 6
AI summary
The invention relates to a pistol (1) with a trigger spring (12) that assists the trigger movement against the force of a recoil spring (21) and engages the trigger slide (3) at one end and the housing (6) of the pistol (1) directly or indirectly at the other end. To further improve the trigger spring (12), it is provided that it is a compression-loaded coil spring, inside which a guide pin (11) is arranged. At one end of the guide pin, the guide pin has a transverse bolt (10) with which it rests in a housing-fixed groove (8). At its other end, the guide pin movably holds a first end region of a hook (13), the second end region of which is U-shaped, and that a part of the trigger slide (3) is mounted in this U-shaped end.