Conductive Cleaner Head Agitators for Static-Free Dust Removal
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Solution Overview
Problem
Nylon bristles in vacuum cleaner brush bars generate static electricity on hard floor surfaces, attracting fine dust and powders, and the use of staples for securing bristles increases manufacturing costs.
Innovation Solution
The use of agitating members with a surface resistivity range of 1×10−5 to 1×10^12 Ω/sq, such as metallic, carbon fiber, or conductive acrylic, which are flexible and protrude from a rotatable body with grooves, effectively discharging static electricity and reducing manufacturing costs by simplifying attachment methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If nylon bristles are used in the brush bar, then acceptable cleaning performance on carpeted surfaces is achieved, but static electricity is generated on hard floor surfaces which attracts fine dust and powders
Solution Approach 1:
The patent changes the electrical parameter (surface resistivity) of the bristle material from insulating (nylon) to conductive range (1×10−5 to 1×1012 Ω/sq). This allows the bristles to discharge static electricity on hard floors while maintaining mechanical cleaning function on carpets.
Solution Approach 2:
The patent employs composite or specially treated materials that combine conductive properties with bristle characteristics. Materials such as carbon fiber, metallic bristles, or conductive acrylic create a composite structure that eliminates static buildup while preserving the agitating function.
2Reliability
If individual staples are used to secure each bristle tuft to the brush bar core, then secure attachment is achieved, but manufacturing cost increases particularly when the number of bristle tufts is increased
Solution Approach 1:
The patent merges multiple individual attachment operations into a single continuous attachment process. Instead of stapling each tuft separately, all bristles are attached simultaneously along the core using continuous adhesive application or wrap-around fastening, dramatically reducing labor and material costs.
Solution Approach 2:
The patent replaces expensive individual metal staples with cheaper alternative attachment methods such as adhesive bonding or plastic retainers that can be applied more economically, especially when scaling to higher numbers of bristle tufts.
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
The solution effectively dislodges fine dust and powder from hard floor surfaces while reducing manufacturing costs by using a simpler attachment mechanism for the agitating members.
Implementation Method 1
The surface resistivity of the agitating members is preferably in the range from 1×10−5 to 1×1012 Ω/sq (ohms per square). The selection of material having a surface resistivity in this range can ensure that any static electricity on the floor surface is effectively discharged by the agitating members upon contact between the agitating members and the floor surface.
Data Source
AI summary
Agitating apparatus for a surface treating appliance includes a rotatable body having a plurality of grooves formed therein, an agitating member located within each groove so that at least one side edge of the agitating member protrudes outwardly from the body, and a connecting member located within each groove for connecting the agitating member to the body.