Pistol Breech Catching Lever Spring Nesting
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Solution Overview
Problem
Existing pistol safety devices with compression springs suffer from poor guidance and lack of captive storage, leading to reduced service life and complex handling during magazine changes.
Innovation Solution
A pre-tensioned coil spring is firmly connected to the holding lever, eliminating relative movement between the spring ends and adjacent components, enhancing the safety gear's structure and service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compression spring is used in the safety device, then the spring can provide the necessary force to pivot the holding lever, but the spring is poorly guided and not stored captively, leading to reduced service life
Solution Approach 1:
The coil spring is nested within the hollow cylindrical body of the holding lever, with the spring ends resting on bearing surfaces formed directly in the lever body. This integrated nesting eliminates the need for separate guidance structures and captive storage mechanisms, while ensuring the spring remains properly positioned and guided during operation.
Solution Approach 2:
The guidance and captive storage functions for the spring are merged into the holding lever body itself through hollow cylindrical construction and integrated bearing surfaces. This combines multiple functions (spring mounting, guidance, and captive storage) into a single structural element, eliminating the need for separate guidance components.
2Ease of manufacture
If a hairpin spring is used with a hook suspension, then the spring can pivot the lever, but the assembly requires skill to assemble and has sliding movement between spring ends and stops
Solution Approach 1:
The holding lever is designed as a disposable or replaceable unit with the coil spring permanently attached. The entire assembly can be replaced as a single unit if wear occurs, eliminating the need for complex assembly procedures and skilled labor during maintenance, while ensuring consistent quality through standardized manufacturing.
3Device complexity
If the spring is not firmly connected to the holding lever, then the structure is simpler, but there is relative movement between spring ends and adjacent components
Solution Approach 1:
The coil spring is nested within the hollow cylindrical body of the holding lever, creating a firm connection through the bearing surfaces. This nested configuration provides stable mechanical connection while maintaining a compact structure, eliminating relative movement without requiring complex external connection mechanisms.
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 solution simplifies the safety device's structure, significantly increases its service life, and improves handling by ensuring reliable operation during magazine changes without the need for manual winding.
Implementation Method 1
a pre-tensioned coil spring (10) which is firmly connected to the holding lever (2)... When the preloaded coil spring is further tensioned, there is practically no relative movement between the ends of the spring and the adjacent components
Data Source
Figure 1~3
Figure 4
Figure 5~7
AI summary
The invention relates to a breech-catching device for a pistol, in which a spring (10) acts on a pivotable retaining lever (2) such that its striking surface (18) and its handle (13) are pushed away from the breech (16). A portion of the retaining lever projects into the path of movement of a magazine slide, which presses on the cartridges, and is pivoted by the magazine slide against the force of the spring (10) after the last cartridge has been inserted. This causes the breech to catch on the striking surface (18) after firing this cartridge and remain in the region of its rear end position. To increase its service life, the spring (10) is a compression spring, which is pre-tensioned between two claws (11, 11') of the retaining lever (2) in a slot (14) of the housing (5) and rests with one end on the bottom of the slot (14) and with the other end against the claw (11).