Rotatable Handle Layout for One-Handed Blower Vacuum Use
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Solution Overview
Problem
Conventional blower-vacuum devices require two hands for vacuum operation due to ergonomic design limitations, making them inefficient and uncomfortable for users.
Innovation Solution
A hand-held blower/vacuum device with a rotatable handle that pivots between blower and vacuum positions, allowing single-handed operation by maintaining the grip above the device's center of gravity, enabling balanced orientations for both modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle is positioned to allow vacuum operation, then vacuum mode is achievable, but both hands are required for operation
Solution Approach 1:
The single handle is designed to serve multiple functions: it provides vacuum operation support, blower mode operation support, and torque application capability. By making the handle universal for both vacuum and blower modes, the patent eliminates the need for separate handles for each mode, resolving the contradiction between operational ease and device complexity
Solution Approach 2:
The handle is made rotatable relative to the main body, allowing it to dynamically adjust between different operational positions (vacuum position and blower position). This dynamic capability enables a single handle to adapt to different operational requirements, providing ease of operation for both modes without requiring multiple fixed handles
2Ease of operation
If a secondary handle is added for torque application, then ergonomic performance improves, but device complexity increases
Solution Approach 1:
The single handle is designed to be multifunctional, serving both as the primary grip for operation and as the means for applying torque to the device. By integrating torque application capability into the existing handle rather than adding a secondary handle, the patent improves ergonomic performance while avoiding increased device complexity
3Ease of operation
If the handle is positioned for single-handed operation, then ease of operation improves, but structural design becomes more complex
Solution Approach 1:
The rotatable handle connection allows the device to be oriented in different positions (vacuum position with downward-inclined air inlet, blower position with downward-inclined air outlet) while maintaining a single handle configuration. This dynamic positioning capability enables single-handed operation without requiring complex fixed multi-position handle structures
Solution Approach 2:
The handle connection is segmented into a rotatable joint between the handle and main body, allowing independent positioning of the handle relative to the device orientation. This segmentation enables the handle to maintain an upright plane alignment for single-handed grip while the device itself can be oriented for different operational modes
Data Source
AI summary
A hand held blower/vacuum device includes an impeller mounted in a scroll housing and a handle by which the device may be suspended and which is rotatably mounted to turn between vacuum and blower positions. In both of the blower and vacuum positions a longitudinal axis of the grip generally lies in an upright plane that passes through a center of gravity of the device, and the grip is disposed above the center of gravity, such that the device hangs below the grip in different balanced orientations in the blower and vacuum positions.