Pivoting Vacuum Cleaner Bristle Assembly for Edge Pickup
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Solution Overview
Problem
Existing vacuum cleaner tools with stiff bristles are prone to marking surfaces and have poor pickup performance, especially at edges and corners, due to the need for stiff bristles to prevent being drawn into the nozzle.
Innovation Solution
A vacuum cleaner tool with a bristle assembly mounted on a pivoting carrier that has wings extending beyond the bristles, allowing for softer and finer bristles to be used, reducing stress and preventing bristles from being drawn into the suction opening, while maintaining effective pickup performance through a sealing mechanism and additional suction openings for edge cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stiff bristles are used to prevent being drawn into the nozzle, then reliability is improved, but surface marking increases and manufacturing precision deteriorates
Solution Approach 1:
The patent introduces a carrier as an intermediary component between the bristles and the suction airflow. The carrier has a leading edge that extends forward of the bristles, creating a seal that blocks suction airflow from directly acting on the bristle roots. This intermediary structure allows soft bristles to be used without being drawn into the nozzle, resolving the contradiction between bristle softness and bristle retention.
Solution Approach 2:
The patent segments the bristle assembly into distinct functional zones: the carrier leading edge handles the sealing and airflow blocking function, while the bristles handle the cleaning function. This segmentation allows each component to be optimized independently - the carrier can be rigid to maintain seal integrity, while the bristles can be soft to avoid surface marking.
2Reliability
If stiff bristles are used to prevent being drawn into the nozzle, then bristle retention is improved, but pickup performance deteriorates
Solution Approach 1:
The carrier acts as an intermediary that manages airflow separation. By extending the leading edge forward of the bristles, it creates a controlled seal that directs suction airflow to pick up dirt from the surface without creating turbulent eddies that would draw bristles inward. This resolves the contradiction by enabling soft bristles to maintain both retention and pickup performance.
3Productivity
If long bristles are used to improve edge and corner cleaning, then pickup performance is improved, but bristle stress increases
Solution Approach 1:
The patent makes the carrier pivotable relative to the nozzle, allowing the bristle assembly to dynamically adapt to surface contours and edge conditions. This dynamic adjustment reduces bending stresses on the bristles by allowing the carrier to rotate and follow the surface geometry, enabling longer bristles to be used for improved edge cleaning without excessive stress accumulation.
Solution Approach 2:
The pivotable carrier connection allows flexible adaptation to surface variations. The flexible mounting mechanism enables the rigid carrier structure to rotate and conform to edge and corner geometries, reducing stress concentration on the bristles while maintaining their length for effective edge cleaning performance.
4Productivity
If a rigid carrier is used to maintain seal integrity, then pickup performance is maintained, but adaptability to surface variations deteriorates
Solution Approach 1:
The patent introduces dynamic pivoting capability to the carrier mounting, transforming it from a fixed rigid connection to a dynamic joint. This allows the rigid carrier to maintain its structural integrity and seal-forming capability while simultaneously adapting its orientation to match surface variations, resolving the contradiction between rigidity and adaptability.
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 enables the use of softer, finer bristles that reduce surface marking and improve longevity, while maintaining effective dirt pickup and reducing noise through improved airflow, with enhanced ability to clean edges and corners.
Implementation Method 1
the carrier pivots or flexes relative to the nozzle and proves an effective seal against the nozzle
Implementation Method 2
an elongate suction opening is provided in a base of the nozzle
Data Source
AI summary
A tool for a vacuum cleaner that includes a nozzle and a bristle assembly. An elongate suction opening is provided in a base of the nozzle. The bristle assembly is mounted within the nozzle and includes a carrier to which a strip of bristles is attached. The carrier pivots or flexes relative to the nozzle and has a pair of wings located on opposite sides of the bristles.