Elongate Pole Handle Assembly for Fatigue Reduction
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Solution Overview
Problem
Existing elongate pole apparatus with powered tools suffer from limited user reach and significant fatigue due to awkward grip configurations, leading to compromised work quality and potential injuries.
Innovation Solution
A handle assembly with a U-shaped gripping portion that allows the user's hand to maintain the second operating component in a released position and change the first operating component's position, enabling comfortable operation with reduced wrist bending and improved reach, featuring a cantilevered lever and pivotable components for speed control and safety switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a straight grip or D-handle grip configuration is used, then the apparatus can be operated with powered tools, but the user's reach is limited and user fatigue increases
Solution Approach 1:
The handle assembly allows dynamic repositioning of the gripping portion along the pole axis, enabling the user to adjust the grip location based on the specific task and reach requirements. This dynamic adjustment capability resolves the contradiction by providing both comfort/ease of operation and adapting to different operational needs without requiring multiple fixed grip configurations
Solution Approach 2:
The handle assembly is segmented into a movable gripping portion and a fixed support structure, allowing the gripping portion to be repositioned independently. This segmentation enables the user to optimize reach and comfort for different tasks while maintaining a relatively simple overall device structure
2Ease of operation
If the user surrounds a grip portion parallel to the pole axis, then the apparatus can be held and repositioned, but it becomes awkward or impossible to maintain grip and control the throttle lever and safety switch simultaneously above head level
Solution Approach 1:
The handle assembly extends in a direction substantially orthogonal to the pole axis, creating a new dimensional arrangement for control components. This orthogonal extension allows the user's hand to naturally access both the throttle lever and safety switch while maintaining grip, resolving the contradiction between control accessibility and simple handle structure
Solution Approach 2:
The handle assembly serves multiple functions: it provides the gripping surface, supports the throttle lever, accommodates the safety switch, and enables repositioning along the pole. This multi-functionality consolidates what would otherwise require separate components, achieving ease of operation without proportionally increasing device complexity
3Ease of operation
If the apparatus weight is borne by the user's hand, then the apparatus can be held in position, but the wrist must constantly exert force leading to fatigue and potential injury
Solution Approach 1:
The handle assembly is positioned and configured to allow the user's forearm to align substantially parallel to the pole axis, creating a lever arm that distributes the apparatus weight along the forearm rather than concentrating it at the wrist. This biomechanical optimization reduces wrist strain and user fatigue while maintaining the ability to hold the apparatus in position
Data Source
AI summary
A powered apparatus having an elongate pole with a tool at a proximal region and a drive for operating the tool. A first operating component is repositionable between first and second positions to change a state of the drive. A second operating component is repositionable between: a) a locked position; and b) a released position wherein the first operating component can be changed from the first position into the second position. A handle assembly has a gripping portion with an extent that can be grasped by the user's one hand at a plurality of different locations along the extent of the gripping portion to control the operating components, including at a first location in a manner wherein with the elongate pole vertically oriented, a majority of a vertical weight force component of the apparatus is directed generally parallel to the length of a user's forearm below the user's one hand.