Cantilevered Tapered Agitator for Vacuum Edge Cleaning
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Solution Overview
Problem
Conventional vacuum cleaner heads often leave unagitated regions on surfaces due to their design, particularly when cleaning edges or obstacles, and struggle to effectively remove debris like hair that falls off the agitator ends.
Innovation Solution
The cleaner head features cantilevered agitator elements with tapered profiles that are angled downwards and forwards, with side openings that provide suction paths and allow the agitator ends to protrude beyond the housing, ensuring a larger agitation width and contact area with surfaces, including edges and obstacles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional cleaner head design is used, then the structure is simple, but unagitated regions are left on surfaces especially at edges and obstacles
Solution Approach 1:
The agitator element is extended beyond the housing footprint in the lateral dimension through side openings, allowing the agitation function to reach edges and obstacles that were previously unagitated. This dimensional extension transforms the cleaning coverage without fundamentally changing the agitator's rotational function.
Solution Approach 2:
The cleaner head is divided into functional zones: the housing contains the motor and suction system, while the agitator element extends beyond the housing through side openings to perform agitation at edges. This segmentation allows the agitation function to operate independently at the periphery without interfering with the main body structure.
2Ease of operation
If agitator element width is increased to improve agitation width, then cleaning performance improves, but the housing size and complexity increase
Solution Approach 1:
The agitator element is nested within the housing structure during storage and transport, but extends beyond the housing through side openings during operation. This nesting arrangement allows the agitator to have a larger effective width without permanently increasing the housing footprint.
Solution Approach 2:
The agitator element transitions from a retracted state within the housing to an extended state through the side openings during cleaning operation. This dynamic configuration allows the agitation width to be increased only when needed, without permanently enlarging the housing.
3Ease of manufacture
If tapered agitator element is used, then manufacturing is simplified, but debris like hair falling off the free end is not effectively collected
Solution Approach 1:
The side opening acts as an intermediary structure that provides a suction path between the free end of the tapered agitator element and the main suction chamber. This intermediary channel captures debris that would otherwise fall off the agitator tip, maintaining both the simple tapered shape and effective debris pickup.
Solution Approach 2:
A suction path is created through the side opening that uses the vacuum cleaner's suction force to draw debris (including hair) that falls off the agitator free end back into the suction chamber. This pneumatic mechanism compensates for the tapered shape's tendency to let debris escape.
4Ease of operation
If agitator elements are angled downwards to increase surface contact, then agitation effectiveness improves, but the structural complexity increases
Solution Approach 1:
The agitator element is mounted with an asymmetric angle relative to the housing, with the free end positioned lower than the base. This asymmetric mounting increases the contact area with the surface without requiring complex adjustable mechanisms, as the angle is fixed during manufacturing.
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 minimizes unagitated regions, enhances debris pickup, and allows for effective cleaning of edges and obstacles by maintaining contact along the entire length of the agitator elements, improving overall cleaning performance.
Implementation Method 1
the side opening provides a suction path from the first end of the agitator element towards the outlet
Data Source
AI summary
A cleaner head (20) for a vacuum cleaner (2), the cleaner head comprising: a housing (32) defining a suction chamber comprising an outlet (34); and an agitator element (22, 24) being mounted for rotation about an axis (R1, R2), wherein: the agitator element comprises a first, free end (26a, 26b) and a second end (28a, 28b), the agitator element has a shape which tapers towards the first end in a direction along the axis of rotation, the agitator element is cantilevered from a portion (30) of the cleaner head at the second end, and the housing comprises a side opening (36) in the housing, adjacent the first end of the agitator element.