Bolt Catch Assembly With Pivot Slider for Tool-Free Rifle Maintenance
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Solution Overview
Problem
Existing bolt catch devices in firearms are complex, difficult to assemble and disassemble, and lack robustness and reliability, often requiring tools for installation.
Innovation Solution
A bolt catch device comprising a foot with a groove for a spring, a slider with a socket, and a spring, where the slider pivots into the socket, guided by a duct in the firearm receiver, allowing easy assembly and disassembly without tools, and ensuring robustness and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the bolt catch device is completely combined with the magazine holder, then the device becomes more integrated, but the assembly and dismounting become difficult and require tools
Solution Approach 1:
The bolt catch device is divided into separate components: the bolt catch itself, the magazine holder, and the follower. This segmentation allows the bolt catch to be integrated with the magazine holder for compactness while maintaining independent removability of the follower, enabling easy assembly and disassembly without tools.
Solution Approach 2:
The follower is extracted as a separate, easily removable component from the magazine holder. This extraction allows the bolt catch device to remain integrated with the magazine holder for structural stability, while the follower can be quickly removed and replaced without requiring tools, resolving the contradiction between integration and ease of assembly.
2Ease of operation
If the bolt catch device uses a lever mounted in a special bearing, then the operation is facilitated, but the device complexity increases
Solution Approach 1:
The complex bearing and lever mechanism is extracted and replaced with a simple pivot point directly integrated into the magazine holder. The bolt catch rotates on this simple pivot without requiring separate bearings or complex lever arms, maintaining ease of operation while significantly reducing device complexity.
Solution Approach 2:
The pivot point for the bolt catch is merged directly into the structure of the magazine holder, eliminating the need for separate bearing components. This merging simplifies the overall device structure while maintaining the rotational motion necessary for easy operation of the bolt catch.
3Force
If the prestressing spring extends into the trigger guard, then the bolt catch can be prestressed, but the construction and mounting become complex
Solution Approach 1:
The prestressing spring is extracted from the complex trigger guard area and relocated to the magazine holder where it can be easily mounted. The spring is positioned to directly prestress the bolt catch through the follower, maintaining the necessary force while simplifying the mounting structure and eliminating the need for complex routing through the trigger guard.
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 provides a simple, durable, and easy-to-assemble bolt catch device that operates from both sides, reducing complexity and enhancing reliability while minimizing space usage.
Implementation Method 1
a spring (4), wherein the abutment (12) prestresses the spring (4) of the bolt catch into the rest position
Implementation Method 2
the slider (3) has, on the lower portion thereof, bearing bolts (15) for being inserted into and pivoted in the socket (13)
Data Source
AI summary
Firearms including a bolt catch device, having a receiver comprising a duct, wherein the bolt catch device comprises a foot, a slider, and a spring, and the foot, on the leg thereof and on the magazine well side, has a groove for receiving the spring and, on the side facing the trigger device, has a socket; wherein the slider has, on the lower portion thereof, bearing bolts for being inserted into and pivoted in the socket, wherein the slider has, at the upper end thereof, a protrusion which protrudes in the direction of the magazine well beyond the contour of the duct, and wherein the receiver has an abutment that protrudes into the groove in order to prestress the spring of the bolt catch into the rest position.