Vacuum cleaner
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Solution Overview
Problem
Vacuum cleaners often struggle to effectively collect debris on both forward and rearward strokes, with existing designs either scattering debris on the rearward stroke or plowing through it, and fail to adjust to varying surface heights.
Innovation Solution
A vacuum cleaner with a debris collection blade hingedly coupled to the housing via a multiply-adjustable linkage, allowing automatic adjustment to collect debris on the forward stroke and float over it on the rearward stroke, while accommodating different surface heights through vertical movement within a flexible coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed debris collection blade is used, then the structure is simple, but it cannot adapt to varying surface heights and either scatters or plows debris
Solution Approach 1:
The debris collection blade is transformed from a fixed position to a dynamic, adjustable position through a multiply-adjustable coupling mechanism. This mechanism includes vertical adjustment for different surface heights and angular adjustment for different stroke directions, allowing the blade to adapt its position dynamically rather than remaining static
Solution Approach 2:
The coupling mechanism is divided into independent adjustment components: vertical adjustment for height and angular adjustment for orientation. This segmentation allows each degree of freedom to be controlled separately, enabling the blade to independently adjust to surface height variations and stroke direction changes without requiring a completely complex integrated mechanism
2Productivity
If the blade is fixed in position, then the mechanism is simple, but debris collection efficiency on both strokes is poor
Solution Approach 1:
The blade positioning is made dynamic through the hinged linkage assembly that allows automatic adjustment between forward and rearward strokes. The linkage enables the blade to assume different angular positions automatically based on the stroke direction, optimizing debris collection on both forward and rearward movements without requiring complex active control systems
Solution Approach 2:
The linkage assembly is designed to automatically adjust the blade position based on the natural movement of the vacuum cleaner during forward and rearward strokes. The mechanism self-regulates the blade orientation without requiring external control signals or complex actuation systems, achieving improved debris collection through passive automatic adjustment
3Adaptability or versatility
If the blade remains stationary, then the structure is simple, but it cannot automatically adjust to different cleaning surfaces
Solution Approach 1:
The stationary blade is replaced with a dynamically adjustable blade mounted on a multiply-adjustable coupling. This coupling provides both vertical movement capability for different surface heights and angular adjustment for different surface types, enabling the blade to automatically adapt to various cleaning surfaces through the mechanical dynamics of the linkage assembly
Data Source
AI summary
A vacuum cleaner includes a housing having a suction nozzle opening, a source of suction in fluid communication with the suction nozzle opening for generating a working air stream through the housing, and a multiply-adjustable debris collecting blade coupled along the rear of the suction nozzle opening for collecting debris.