Vacuum Cleaner Nozzle Sole With Rounded Rear Edge for Uniform Suction
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Solution Overview
Problem
Vacuum cleaner nozzles often experience uneven suction pressure, with higher pressure in the central part and lower pressure at the sides, leading to dissatisfaction among users due to inadequate suction performance across the entire surface.
Innovation Solution
A vacuum cleaner nozzle design featuring a sole with a rear part set back from the rear sliding surface and a convex connecting surface oriented away from the suction channel, promoting air passage at the end portions of the suction channel, and incorporating a rear scraping rib and support surfaces to maintain effective suction and prevent damage on smooth floors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the suction channel is connected to the connecting sleeve via a connecting tube that opens into the central part of the suction channel, then the structure is simple and easy to manufacture, but the suction pressure becomes uneven with higher pressure in the central part and lower pressure at the lateral edges
Solution Approach 1:
The invention introduces a convex bonding surface at the rear end of the soleplate that creates a clearance between the rear sliding surface and the rear part of the soleplate. This local structural modification redirects airflow to the lateral portions of the suction channel, ensuring uniform suction pressure distribution across the entire width of the soleplate while maintaining structural simplicity.
2Device complexity
If the rear sliding surface has a straight front edge parallel to the suction channel extension, then the structure is simple, but the airflow at the end portions of the suction channel is insufficient
Solution Approach 1:
The invention modifies the front edge of the rear sliding surface from a straight line to a rounded curvilinear shape. This curvature modification optimizes the airflow pattern at the end portions of the suction channel, ensuring that air is effectively directed toward the lateral edges where suction pressure was previously insufficient, thereby improving overall cleaning productivity.
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
This design ensures consistent suction performance across the entire length of the suction channel and optimizes scraping capabilities on soft floors without venting, enhancing the nozzle's reliability and efficiency.
Implementation Method 1
the connecting surface is convex, a convexity of the connecting surface being oriented opposite to the suction channel. Such a configuration of the underside of the sole promotes airflow at the end portions of the suction channel
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Vacuum cleaner nozzle (2) comprising a sole (5) having a lower face (11) and a suction channel (12) opening onto the lower face (11) and extending along an extension direction (D1) which is substantially transverse to a direction of movement (D2) of the vacuum cleaner nozzle, the suction channel (12) comprising a front edge and a rear edge (12b), the lower face (11) having a rear sliding surface (14) and a front sliding surface (15) situated on either side of the suction channel (12). The lower face (11) of the sole (5) has a rear part (18) located in recess from the rear sliding surface (14) and a connecting surface (19) connecting the rear sliding surface (14) to the rear part (18), the connecting surface (19) being convex, one convexity of the connecting surface (19) being oriented opposite to the suction channel (12).