Surface Cleaning Apparatus Debris Ejector with Retractable Push Rod
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Solution Overview
Problem
Existing surface cleaning apparatuses, such as vacuum cleaners, face challenges in efficiently disposing of accumulated debris from collection assemblies, often requiring manual removal or shaking due to debris becoming stuck, especially when relying solely on gravity for disposal.
Innovation Solution
Incorporation of a debris ejector mechanism with a retractable push rod that applies force to eject debris from the collection assembly through a bottom outlet, allowing for forced ejection of debris and improving disposal efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If gravity alone is used for debris disposal, then the device complexity is reduced, but debris removal efficiency deteriorates due to debris becoming stuck
Solution Approach 1:
The debris ejector mechanism is automatically actuated by the existing suction motor through the drive shaft and gear system, eliminating the need for manual operation. The system uses its own operational energy (motor rotation) to drive the ejector, making the debris removal process self-service and integrated into normal vacuum operation.
Solution Approach 2:
The debris ejector transitions from a static gravity-dependent system to a dynamic mechanically-actuated system. The ejector is rotated into different positions (engaged and disengaged) based on operational needs, allowing the system to adapt between passive debris collection and active debris ejection modes.
2Ease of operation
If a debris ejector mechanism is added, then debris removal efficiency is improved, but device complexity increases
Solution Approach 1:
The debris ejector mechanism is merged with the existing motor housing and drive system. The ejector is mounted within the motor housing and driven by the motor's own rotation through the drive shaft and gear, combining multiple functions (motor operation and debris ejection) into a single integrated system rather than adding a separate manual ejection mechanism.
Solution Approach 2:
The motor serves multiple functions: it provides suction power, drives the debris ejector through the drive shaft and gear mechanism, and can be used to actuate the ejector for debris removal. This multi-functionality reduces the need for separate dedicated components for each function.
3Loss of time
If manual removal or shaking is required, then device complexity is minimized, but loss of time increases due to manual intervention
Solution Approach 1:
The system automatically performs debris ejection using its own motor power without requiring user intervention. The motor drives the ejector through the drive shaft and gear system, making the entire debris removal process automated and eliminating the need for manual shaking or removal operations.
Solution Approach 2:
The manual mechanical action of shaking or removing debris is replaced by an automated mechanical ejection system driven by the motor. The gear-driven ejector mechanism substitutes for manual user actions, providing automated debris removal that saves time and effort.
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 debris ejector mechanism enables effective and efficient disposal of accumulated debris without manual intervention, enhancing the usability and effectiveness of surface cleaning apparatuses by ensuring debris can be easily and forcefully removed from the collection assembly.
Implementation Method 1
downward pressure on the push rod displaces the debris ejector relative to the debris outlet
Data Source
AI summary
A surface cleaning apparatus includes a separating and collection assembly defining a collection chamber which receives debris and has a debris outlet, and a debris ejector reciprocally moveable within the collection chamber for ejecting debris through the debris outlet. A retractable push rod can be used to displace the debris ejector relative to the debris outlet.