Two-Part Cleaning Blade Assembly for Crevice-Stable Dust Suction
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Solution Overview
Problem
Autonomous cleaning devices face inefficiencies in dust suction and abnormal noise due to the blade's inconsistent contact with the floor, which is exacerbated by uneven surfaces and crevices.
Innovation Solution
The autonomous cleaning device features a blade assembly with a fixed first part and an extended second part, supported by a fixing member and a support member to maintain consistent contact with the floor, including contact portions that prevent the blade from bending or falling into crevices, ensuring proper alignment with the brush unit's rotational arc.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the blade is extended toward the floor to guide dust, then dust suction performance is improved, but the blade bends in the opposite direction of travel when encountering crevices or uneven surfaces
Solution Approach 1:
The blade is divided into a first part fixed to the main body and a second part extended toward the floor. This segmentation allows the second part to flex and adapt to floor variations while the first part remains stable, preventing the entire blade from bending abnormally when encountering crevices.
Solution Approach 2:
The blade's flexibility and extension length are optimized to maintain contact with the floor while accommodating floor variations. The support member positioning and blade geometry are designed to allow controlled deflection without excessive bending in the opposite direction of travel.
2Productivity
If the blade is fixed rigidly to maintain contact with the floor, then cleaning performance is improved, but abnormal noise is generated when the blade encounters crevices or uneven surfaces
Solution Approach 1:
By dividing the blade into fixed and extended parts, the design allows the second part to absorb shocks from floor variations independently, preventing rigid impact noises while maintaining cleaning contact.
Solution Approach 2:
The support member is positioned to provide preemptive support to the blade before it encounters significant floor variations, reducing sudden impacts and abnormal noise generation during operation.
3Productivity
If the blade is extended to guide dust effectively, then dust suction performance is improved, but the blade falls into crevices on uneven floors
Solution Approach 1:
The segmented blade structure allows the second part to flex and recover from crevices independently, maintaining consistent dust-guiding contact while adapting to uneven floor surfaces.
Solution Approach 2:
The blade's geometric parameters and material properties are optimized to provide sufficient flexibility to bridge small crevices while maintaining adequate rigidity to guide dust effectively, ensuring reliable floor contact across various floor conditions.
Data Source
AI summary
A blade assembly of an autonomous cleaning device. The blade assembly includes a blade having a first part fixed to the main body and a second part extended from the first part toward a floor and a support member having at least a portion disposed adjacent to the second part of the blade to restrict movement of the second part of the blade to within a predetermined range.