Stationary Platform Locking Assembly for Anti-Rotation Column Joints
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Solution Overview
Problem
Current locking mechanisms for multi-piece center columns and telescoping legs of stationary platforms, such as tripods, fail to provide sufficient stability, leading to accidental loosening and detachment during use.
Innovation Solution
A locking assembly that secures column portions together using a non-circular insert and fastening rod, preventing rotation and ensuring secure engagement, and a locking mechanism for telescoping legs with a locking ring, rotation stop, and locking nut to prevent disengagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If threading is used to join column pieces, then the connection allows for length adjustment and weight reduction, but the threads unintentionally loosen during axial rotation
Solution Approach 1:
The patent employs asymmetric non-circular cross-sections (square, rectangular, triangular, or polygonal) for the insert and corresponding column portion interfaces. This asymmetric geometry prevents rotational movement while allowing linear insertion and removal, thereby maintaining connection stability during axial rotation operations. The non-circular shape creates mechanical interference that blocks rotation but permits controlled assembly and disassembly along the axial direction.
Solution Approach 2:
The locking assembly is divided into distinct functional components: a non-circular insert with threaded channel, a column portion with matching non-circular interface, and a fastening rod. This segmentation allows each component to perform its specific function - the insert provides both locking geometry and threading, the column portion provides the mating interface, and the fastening rod provides the locking mechanism - while working together to resolve the contradiction between adjustability and stability.
2Ease of operation
If twist-lock designs are used for telescoping legs, then the locking mechanism is simple to operate, but the lock can unthread and legs can collapse
Solution Approach 1:
The telescoping leg locking mechanism uses non-circular cross-sections for the insert and leg portion interfaces. This asymmetric geometry prevents rotational unthreading while maintaining simple operation - the user simply needs to push the leg sections together to engage the lock, and the non-circular geometry automatically prevents rotation. To release, the user pulls the sections apart. This eliminates the need for complex twisting motions while ensuring the lock cannot accidentally unthread.
Solution Approach 2:
The non-circular geometry of the insert and leg portion creates preliminary anti-action by physically preventing rotational movement before any unthreading can occur. The asymmetric shape creates mechanical interference that blocks the rotational path, thereby preventing the harmful effect of accidental unthreading and leg collapse before it can happen.
3Reliability
If multiple locking components are added to prevent loosening, then connection stability improves, but device complexity increases
Solution Approach 1:
The patent merges multiple functions into integrated components. The insert combines the non-circular locking geometry with a threaded channel, eliminating the need for separate locking and threading components. The fastening rod serves both as a structural element and a locking mechanism. This merging reduces the number of discrete parts while maintaining connection stability, thereby improving reliability without proportionally increasing complexity.
Solution Approach 2:
The non-circular insert design serves multiple functions simultaneously: it provides rotational locking through its asymmetric geometry, maintains axial positioning, and incorporates threading for the fastening rod. This multi-functionality reduces the need for additional specialized components, thereby improving connection stability without adding proportional complexity to the overall mechanism.
Data Source
AI summary
The disclosure relates to locking assemblies. In one embodiment, the disclosure relates to locking assemblies for a center column of a stationary platform. In another embodiment, the disclosure relates to locking assemblies for legs of a stationary platform.