Power Tool Handlebar Coupler for Configurable Positioning
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Solution Overview
Problem
Existing handheld outdoor power equipment, such as trimmers and blowers, often require cumbersome and complicated mechanisms to switch between operating and storage configurations, limiting user flexibility and ease of use.
Innovation Solution
A handle assembly with a handlebar coupler that allows rotation about two orthogonal axes and sliding, facilitated by a locking lever with cam and arm portions, enabling easy transition between operating and transport positions without the need for tools or complex manipulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If handles are positioned at displaced locations (handlebar structure) to improve operator control and posture, then operator comfort and control are improved, but device space consumption increases
Solution Approach 1:
The handlebar assembly is designed to be movable relative to the longitudinal member, allowing it to transition between a deployed position (providing improved operator control) and a retracted position (reducing space consumption). This dynamic configuration enables the device to adapt its handlebar position based on operational needs versus storage requirements.
2Area of stationary object
If handles are made foldable to reduce space consumption, then device portability is improved, but the folding mechanism becomes cumbersome and complicated to operate
Solution Approach 1:
The handlebar assembly is segmented into movable and fixed portions, connected through a coupling mechanism that allows independent movement. This segmentation enables the handlebar to be repositioned without requiring complex folding of the entire structure, simplifying the operation while achieving space reduction.
Solution Approach 2:
A coupling mechanism acts as an intermediary between the handlebar assembly and the longitudinal member, facilitating easy movement and repositioning. This intermediary component simplifies the transition between configurations by providing a straightforward mechanical interface that requires minimal effort to operate.
3Stability of the object's composition
If a locking mechanism is added to secure the handlebar in position, then structural stability is improved, but device complexity increases
Solution Approach 1:
The coupling mechanism incorporates a self-locking feature that automatically secures the handlebar assembly to the longitudinal member when positioned. This self-service locking mechanism maintains structural stability without requiring additional complex locking components or manual intervention, thereby avoiding increased device complexity.
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 operators to easily switch between configurations using one hand, improving handling, storage, and operational flexibility while maintaining intuitive and straightforward operation.
Implementation Method 1
The locking lever includes a cam portion housing an axis of rotation of the locking lever and an arm portion extending away from the cam portion, and responsive to rotation of the locking lever about the axis of rotation, the cam portion exerts different pressures on the clamp portion of the handlebar coupler to alternately lock and unlock the handlebar coupler.
Data Source
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AI summary
A handheld device may include a support shaft, a power source, a working assembly operably coupled to the support shaft and powered by the power source to facilitate performance of a working function of the handheld device, and a handle assembly operably coupled to the support shaft. The handle assembly may include a handlebar coupling a first handle disposed at one end of the handlebar and a second handle disposed at an opposing end of the handlebar, a handlebar coupler rotatably coupling the support shaft and the handle assembly, and a locking lever. The handlebar coupler may be configured to selectively enable rotation of the handlebar about a first axis and a second axis based on a position of the locking lever.