Extendable Pole Mechanism for Paint Roller One-Handed Adjustment
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Solution Overview
Problem
Existing adjustable length poles in the paint industry are difficult to use, often requiring two hands, are prone to shifting from their set length, offer only discrete adjustments, and have a short lifespan, leading to increased costs.
Innovation Solution
An extendable pole mechanism featuring a housing, a push member, a trigger, and a cam lever that allows for one-handed adjustment of the pole length by moving the trigger to change the cam lever's position, enabling continuous length adjustment between a fixed and adjustable condition, with a biasing device like a spring for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional adjustable length poles are used, then the pole length can be adjusted, but the adjustment process requires two hands and is difficult to operate
Solution Approach 1:
The cam lever mechanism automatically locks the pole segments in position when adjusted, eliminating the need for manual locking operations. The spring-loaded push member automatically returns the cam lever to the locked position after adjustment, making the system self-servicing and requiring only one hand to operate.
Solution Approach 2:
The cam lever transitions between two dynamic states: a locked position where it engages with the pole segment to prevent movement, and an unlocked position where the pole segments can be freely adjusted. This dynamic switching enables easy one-handed operation while maintaining structural integrity.
2Stability of the object's composition
If traditional adjustable length poles are used, then the pole length can be adjusted, but the pole easily comes loose from its setting
Solution Approach 1:
The cam lever is designed to proactively engage with the pole segment before any loosening can occur. The spring-loaded push member continuously applies force to maintain the cam lever in the locked position, counteracting any tendencies for the pole to come loose from its setting.
3Measurement precision
If traditional adjustable length poles are used, then the pole length can be adjusted in discrete increments, but the adjustment precision is limited
Solution Approach 1:
The cam lever mechanism allows the pole segments to be positioned continuously along the adjustable range, then locked at any desired position. This dynamic locking capability provides infinite adjustment precision while maintaining the flexibility to achieve any length within the operational range.
4Duration of action of stationary object
If traditional adjustable length poles are used, then the pole can be adjusted, but the mechanism wears out quickly
Solution Approach 1:
The spring-loaded push member automatically returns the cam lever to the locked position after each adjustment, eliminating the need for manual resetting. This self-servicing action reduces wear on the adjustment mechanism by ensuring consistent engagement and proper positioning after each use.
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 mechanism allows for easy, one-handed adjustment of pole length with infinite precision, maintaining the set length and extending durability, reducing operational complexity and costs.
Implementation Method 1
a biasing device like a spring for stability
Data Source
Figure 1
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AI summary
An extendable pole mechanism may be used with a pair of poles that are longitudinally movable to adjust the overall length of both poles. The mechanism may include a housing that receives the poles and a trigger that is moveable with respect to the housing to adjust the mechanism between a use condition, where the poles are held in a longitudinally relative fixed position, and an adjustment condition, where the poles are longitudinally moveable with respect to each other.