Telescopic Rod Lock Mechanism with Nested Wedge and Spring Assembly
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Solution Overview
Problem
Existing adjustable rods lack sufficient locking force to prevent slippage between the inner and outer rods, and their end cap systems are often complicated.
Innovation Solution
A lock mechanism with a wedge shaft, rod insert, and wedge design that secures the inner and outer rods together, enhanced by an adjustment gap allowing further tightening, and dual-mount end cap assemblies that simplify installation and enhance locking force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a lock mechanism is added to secure the inner and outer rods together, then the locking force is improved, but the device complexity increases
Solution Approach 1:
The lock mechanism components (wedge, rod insert, spring) are nested within the telescopic rod structure. The rod insert is received within the outer rod, and the spring is contained within a cavity in the rod insert, creating a compact nested arrangement that provides locking force without excessive complexity
Solution Approach 2:
The spring-loaded rod insert automatically engages with the outer rod to provide locking force when the telescopic rods are extended. The spring automatically pushes the rod insert outward to contact the outer rod, creating a self-activating locking mechanism that reduces the need for complex control systems
2Reliability
If adjustable end caps are used to secure the rods between opposing support surfaces, then the attachment security is improved, but the device complexity increases
Solution Approach 1:
The end cap system is divided into separate components: an end cap that attaches to the outer rod and a separate rod insert that receives the inner rod. This segmentation allows each component to perform its specific function independently, simplifying the overall system while maintaining attachment security
Solution Approach 2:
The end cap assembly serves multiple functions: it secures the outer rod to the mounting surface, provides a mounting interface for the rod insert, and maintains the structural integrity of the adjustable rod system. This multi-functionality reduces the need for additional specialized components
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 lock mechanism provides improved locking force to prevent unintentional slippage and simplifies the construction of adjustable rods by ensuring secure attachment to mounting surfaces.
Implementation Method 1
a spring (28) received in a cavity (56) in the rod insert (24)
Implementation Method 2
an outer surface of the wedge (26) has a friction engagement with an inner surface of the outer rod (14)
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.