Brush Set Pushbutton Height Adjustment for Floor Care Appliances
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Solution Overview
Problem
Existing floor care appliances with brush rollers face challenges in user-friendly height adjustment due to complex and expensive electronic/electronic adjusting devices, which are often inaccessible and difficult to operate, especially when trying to adapt to varying underfloor conditions and brush wear.
Innovation Solution
A pushbutton mechanism in the upper housing region of the brush set, coupled with a multistage switchable detent and an adjustable axis, allows for height adjustment of the wheel using a detachable manual suction tube, providing secure actuation and the option for foot actuation, with a position display for documentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If electronic/electronic adjusting devices are used for brush roller height adjustment, then uniform tracking forces and adaptability to underfloor conditions are improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces complex electronic/electronic adjusting devices with a simple mechanical pushbutton mechanism. The pushbutton is actuated by the manual suction tube to directly mechanically adjust the brush roller height, eliminating the need for expensive and complex electronic sensors and actuators while maintaining adaptability to different underfloor conditions.
Solution Approach 2:
The manual suction tube serves a dual function: it is both a functional component for auxiliary suction work and the actuating element for height adjustment. By utilizing the existing suction tube to operate the pushbutton, the system achieves self-service adjustment without requiring separate control mechanisms, reducing overall device complexity.
2Device complexity
If manual wheel settings are used for brush roller height adjustment, then device complexity is reduced, but ease of operation deteriorates due to poor accessibility
Solution Approach 1:
The patent relocates the adjustment mechanism from the lower wheel area (poor accessibility) to the upper housing region (good accessibility). The pushbutton is positioned in the upper region and can be actuated by the manual suction tube held by the operator, transforming the adjustment operation from a difficult lower-body task to an easy upper-body operation.
Solution Approach 2:
The manual suction tube serves as an intermediary tool that connects the operator's hand to the pushbutton mechanism. The suction tube's edge region engages with the pushbutton's control surface, allowing the operator to easily actuate the adjustment from a comfortable standing position without bending down to access the wheels.
3Ease of operation
If the pushbutton is actuated by the manual suction tube, then ease of operation is improved, but reliability may worsen due to potential slippage
Solution Approach 1:
The control surface of the pushbutton features a composite structure combining a recess or elevation with a lateral contact surface. This composite geometry creates multiple contact points with the manual suction tube's edge region, preventing slippage while maintaining easy operation. The recess/elevation provides vertical engagement while the lateral surface provides horizontal constraint.
Data Source
AI summary
A floor care appliance having a height-adjustable brush set. A pushbutton of the brush set is actuatable for height adjustment via a manual suction tube of the floor care appliance. The pushbutton has a receptacle for receiving an edge region of a manual suction tube and/or for foot actuation.