One-Handed Telescopic Pole Mechanism for Paint Rollers
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Solution Overview
Problem
Existing adjustable length poles in the paint industry are difficult to use, require considerable force or two hands, easily come loose, offer only discrete length adjustments, and are prone to wear, leading to increased costs.
Innovation Solution
An extendable pole mechanism featuring a housing with moveable contact devices and levers, operated by a trigger, allowing for one-handed adjustment between use and adjustment conditions, providing infinite length adjustment and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional locking mechanisms (washers, buttons, levers) are used to secure telescopic poles, then the poles can be locked in place, but they require two hands or considerable force to adjust and are difficult to operate
Solution Approach 1:
The locking mechanism is divided into two independent contact devices (first and second contact devices) that can be controlled separately. Each contact device has its own lever and spring system, allowing one hand to control one contact device while the other remains engaged, simplifying the adjustment operation
Solution Approach 2:
A trigger mechanism serves as an intermediary that transmits force from the user's hand to the levers, which in turn move the contact devices. This intermediary system allows easy one-handed operation while maintaining the locking function
2Reliability
If traditional washer-based locking mechanisms are used, then the poles can be locked, but they easily come loose from their setting causing unwanted length changes
Solution Approach 1:
The springs are pre-loaded to exert a constant locking force on the poles before adjustment begins. This preliminary locking action ensures the poles remain securely held in any position once adjusted, preventing them from coming loose during use
Solution Approach 2:
The contact devices are designed to be dynamic rather than static - they can quickly transition from a locked state to an unlocked state and back again. The springs provide continuous force to maintain the locked state, while the levers allow rapid state changes when needed
3Adaptability or versatility
If discrete length increments are used in adjustable poles, then the mechanism is simpler, but the poles cannot provide infinite length adjustment
Solution Approach 1:
The telescopic poles are designed with continuous movement capability rather than discrete steps. The contact devices lock the poles at any position along their length, not just at predetermined intervals, enabling infinite length adjustment while keeping the locking mechanism relatively simple
Solution Approach 2:
The system allows continuous change of the length parameter rather than discrete jumps. The springs and contact devices are designed to maintain locking force across a continuous range of positions, enabling smooth adjustment from minimum to maximum length without fixed increments
4Duration of action of stationary object
If traditional locking mechanisms are used repeatedly, then they can maintain their function, but they quickly wear out increasing costs
Solution Approach 1:
The springs automatically maintain the locking force without requiring additional input from the user. Each time the levers are moved to adjust the pole length, the springs self-eng age the contact devices to lock the position, eliminating wear from repeated manual tightening operations
Solution Approach 2:
The springs are pre-loaded to absorb and distribute the forces generated during adjustment and locking operations. This cushioning effect reduces peak stresses and wear on the contact devices and levers, extending the overall lifespan of the mechanism
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 easy, one-handed operation with infinite length adjustment, maintaining the setting and reducing wear, thus enhancing user convenience and reducing maintenance costs.
Implementation Method 1
a first spring that is: (1) is mounted in supported relationship to the housing; and, (2) is moveable with respect to the housing; a second spring that is: (1) is mounted in supported relationship to the housing; and, (2) is moveable with respect to the housing
Data Source
Figure 1
Figure 2~3
Figure 4~5
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.