Rotatable Handle Layout for Balanced Blower Vacuum Operation
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Solution Overview
Problem
Existing blower-vacuum devices require two hands for vacuum operation due to ergonomic design limitations, making them inconvenient for users.
Innovation Solution
A handheld blower/vacuum device with a rotatable handle that pivots between blower and vacuum positions, allowing single-handed operation by maintaining the grip axis upright and center of gravity below the grip in both modes, with a pivot axis perpendicular to the impeller axis for balanced orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the handle is integral with the impeller housing and sections are acutely inclined to provide vacuum and blower modes, then the device can switch between modes, but a secondary handle is required for vacuum operation which increases device complexity and requires two hands for operation
Solution Approach 1:
The single handle is designed to perform multiple functions: it serves as both the primary control handle and provides the necessary torque application point for vacuum operation. The handle includes a trigger mechanism for mode switching and a grip section that can be used for both blowing and vacuuming operations, eliminating the need for a secondary handle.
Solution Approach 2:
The invention merges the functions of what would traditionally require separate handles into a single integrated handle structure. The trigger mechanism and grip sections are combined in one component that can be operated with a single hand, consolidating multiple operational functions into one ergonomic interface.
2Force
If a secondary handle is provided for vacuum operation, then torque application is improved, but the device complexity increases and single-handed operation is no longer possible
Solution Approach 1:
The single handle is segmented into functional zones: a trigger section for mode switching and a grip section for torque application. This segmentation allows the handle to provide adequate torque for vacuum operation while maintaining a compact, single-handle structure that can be operated with one hand.
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
A hand held blower/vacuum device (10) includes an impeller (53) mounted in a scroll housing and a handle (14) 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 (17) of the grip (16) generally lies in an upright plane that passes through a centre of gravity (60) of the device, and the grip is disposed above the centre of gravity, such that the device hangs below the grip in different balanced orientations in the blower and vacuum positions.