Axial Latch Speed Loader for Revolver Cartridge Retention
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Solution Overview
Problem
Existing speed loaders for revolvers are bulky, complex, require a rotating latch mechanism, and face issues with reliability, ease of handling, and precise alignment, leading to accidental release of cartridges and friction during operation.
Innovation Solution
A speed loader design featuring a body with cartridge pockets and a central shaft that moves between forward and rear positions, using latch balls that extend and retract in response to the shaft's position to retain and release cartridges without a rotating latch mechanism, allowing for easy loading and alignment with the revolver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rotating latch mechanism is used to retain cartridges, then cartridges can be securely held during loading, but the device becomes bulky, complex, and experiences high friction during operation
Solution Approach 1:
The patent extracts the rotation function from the latch mechanism, eliminating the rotating latch entirely. Instead, the latch members are driven purely axially by the central shaft's linear motion, removing the harmful rotational friction and mechanical complexity while maintaining reliable cartridge retention through simple axial engagement and disengagement of the latch balls
Solution Approach 2:
The patent replaces the complex rotating latch mechanism with a simpler axial drive system. The central shaft moves linearly to simultaneously control multiple latch members through axial motion only, substituting the rotational mechanical system with a streamlined linear actuation system that reduces friction and mechanical complexity
2Reliability
If a rotating latch mechanism is used to retain cartridges, then cartridges can be securely held during loading, but friction impedes operation of the latch mechanism
Solution Approach 1:
The patent removes the rotation function from the latch mechanism, eliminating the source of friction entirely. The latch members are driven purely axially by the central shaft's linear motion, removing the harmful rotational friction that impeded operation in prior devices while maintaining reliable cartridge retention through simple axial engagement
3Manufacturing precision
If precise alignment between loader and revolver is required, then cartridges can be accurately loaded, but the device becomes difficult to handle and operate under stress
Solution Approach 1:
The patent employs self-aligning features and tolerance compensation that allow the loader to function effectively even with minor misalignments. The design includes features such as tapered guide surfaces and flexible latch engagement that automatically compensate for small alignment errors, reducing the need for precise manual alignment while maintaining reliable cartridge loading
Solution Approach 2:
The patent incorporates alignment tolerance through design parameters such as enlarged guide surfaces, adjustable latch positions, and flexible cartridge retention mechanisms. These parameter changes allow the system to accommodate variations in alignment without compromising loading accuracy or requiring difficult manual adjustment under stress
4Volume of moving object
If a compact design is pursued to improve portability, then the device becomes easier to handle, but the latch mechanism and cartridge retention features may become insufficient
Solution Approach 1:
The patent nests the latch members within the central shaft structure, with the latch balls positioned in recesses of the shaft that engage with corresponding features in the cartridge rim. This nested arrangement maintains reliable retention in a compact configuration, as the latch mechanism is integrated into the shaft rather than being a separate external component
Solution Approach 2:
The patent merges the central shaft and latch drive functions into a single integrated component. The shaft simultaneously provides structural support, axial positioning, and latch actuation through its geometry, combining multiple functions into one element that maintains reliability while minimizing overall device volume
Data Source
AI summary
A speed loader has a body having a front and an opposed rear, and defining a body axis, the body defining a plurality of cartridge pockets, each pocket open at the front, the body defining a central opening receiving a central shaft movable between a forward position and a rear position, a plurality of latches received by the body and each movable between an extended position away from the body axis and a retracted position nearer the body axis, each latch extending into an associated pocket when in the extended position and being clear of the associated pocket when in the retracted position, and each latch being responsive to the position of the central shaft wherein each latch is restrained in the extended position when the shaft is in the forward position and is enabled to move to the retracted position when the shaft is in the rear position.