Quick-Detach Accessory Base Mount Cam Mechanism
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Solution Overview
Problem
Existing accessory attachment methods for rails, such as those on firearms and other mounting apparatuses, are time-consuming and can damage the rail finish due to the need for tools and repetitive actions, or cause chafing with rotating surface attachments.
Innovation Solution
A quick-detach accessory base mount with a cam-supported rail clamp that moves to selectively clamp and release the accessory base mount to the rail, allowing for rapid attachment and detachment without damaging the rail, featuring a mounting arm that rotates between gripping and releasing positions, and an interlock mechanism for precise control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rigid-attachment-type methods (ring, bracket, screw fasteners) are used to attach accessories, then secure attachment is achieved, but attachment/detachment becomes time-consuming and complicated requiring tools and repetitive actions
Solution Approach 1:
The patent employs a dynamic cam mechanism that transitions between locked and unlocked states through rotational motion of the mounting arm. The cam profile converts the rotational movement into linear displacement of the clamp, enabling rapid attachment and detachment without tools while maintaining secure attachment through the cam's mechanical locking action.
Solution Approach 2:
The attachment system is segmented into independent functional components: the mounting arm for operation, the cam for force amplification and locking, and the clamp for securing. This segmentation allows each component to perform its specific function efficiently, enabling quick attachment/detachment while maintaining reliability.
2Ease of operation
If rotating surface attachment methods are used to secure accessories, then rapid attachment/detachment is enabled, but the rotating surface chafes the rail finish and damages the rail over time
Solution Approach 1:
The patent introduces a clamp as an intermediary element that contacts the rail instead of the rotating mounting arm surface. The clamp acts as a mediator between the rotational motion and the rail surface, allowing the mounting arm to rotate freely while the clamp maintains static contact with the rail, preventing chafing and finish damage.
Solution Approach 2:
The system uses dynamic motion of the mounting arm to achieve attachment/detachment while the clamp remains relatively stationary during rotation. This dynamic design allows rapid operation without the rotating surface directly contacting and damaging the rail finish.
3Measurement precision
If a cam mechanism is used to support the rail clamp for gripping and releasing, then precise control of clamp position is achieved, but device complexity increases
Solution Approach 1:
The cam mechanism is merged with the mounting arm into a single integrated component rather than being separate parts. This combination reduces the number of individual components while maintaining the precise position control function, as the cam profile is directly formed on or attached to the mounting arm.
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
Enables rapid and precise attachment/detachment of accessories while preserving alignment and allowing for preload adjustments to accommodate different rail types, without causing chafing or damage to the rail finish.
Implementation Method 1
A cam is configured to support the rail clamp to grip the rail and to clamp the body to the rail when the mounting arm is in the first position and to release the rail clamp from gripping the rail when the mounting arm is in the second position
Implementation Method 2
The rail clamp is springily biased in an ungripped position
Data Source
AI summary
In some aspects a quick-detach (QD) accessory base mount includes a body. The body includes an accessory engagement interface configured to engage an accessory and a rail engagement interface defining a channel adapted to receive an accessory rail. A rail clamp is carried by the body and is moveable to selectively clamp the body to the accessory rail. A mounting arm extends outwardly from the body and is carried to rotate relative to the body between a first position and a second position. A cam is configured to support the rail clamp to grip the accessory rail and to clamp the body to the accessory rail when the mounting arm is in the first position and to release the rail clamp from gripping the accessory rail when the mounting arm is in the second position.