Adjustable Rod Lock Mechanism with Nested Wedge and Segmented End Cap
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Solution Overview
Problem
Existing adjustable support rods lack sufficient locking force to prevent slippage between the inner and outer rods, and their end cap systems are often complex and difficult to construct.
Innovation Solution
A lock mechanism featuring a wedge shaft, rod insert, and wedge, along with adjustable end cap assemblies, that apply additional locking force through an adjustment gap to secure the rods, preventing unintentional shifting by enhancing the friction fit between the outer and inner rods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a simple lock mechanism is used in adjustable rods, then the device complexity is reduced, but the locking force is insufficient to prevent slippage between the inner and outer rods
Solution Approach 1:
The lock mechanism employs a nested structure where the wedge shaft is received within the rod insert, and the wedge is positioned within the outer rod. The wedge shaft extends into the rod insert, and the wedge is positioned in the outer rod, creating a compact nested arrangement that generates sufficient locking force through friction between the nested components without requiring complex external structures.
Solution Approach 2:
The wedge shaft acts as an intermediary element between the inner rod and the wedge. It includes an annular flange that moves between locked and unlocked states, mediating the force transmission and enabling the lock mechanism to achieve sufficient locking force through this intermediate component rather than direct contact between the rods.
2Reliability
If complicated end cap systems are used, then the locking force and security are improved, but the ease of manufacture is reduced
Solution Approach 1:
The end cap system is segmented into distinct functional components: the end cap itself, the rod insert with threading, and the integration with the lock mechanism. This segmentation allows each component to be manufactured separately with standard threading and assembly features, simplifying the manufacturing process while maintaining reliable rod security through the coordinated function of the segmented parts.
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 robust locking mechanism that prevents slippage between the rods, even under compressive force, and simplifies the construction of end cap systems, ensuring the rods remain securely positioned.
Implementation Method 1
enhancing the friction fit between the outer and inner rods
Data Source
AI summary
There is provided a lock mechanism for an adjustable rod. The lock mechanism provides a manually locking state and an automatic locking state. The automatic locking state provides a more secure locking engagement than the manual locking state. There is also provided improved end cap systems that minimize the number of components.