Vacuum cleaner with scraper assembly
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Solution Overview
Problem
Existing vacuum cleaners face challenges in effectively collecting debris, particularly in preventing pile-up and ensuring efficient debris collection during both forward and reverse movements.
Innovation Solution
A vacuum cleaner with a scraper assembly featuring a removable frame member and overlapping flap members that pivot to closed and open positions based on direction of movement, facilitating debris collection and prevention of pile-up.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional vacuum cleaner design is used, then the structure is simple, but debris pile-up occurs during cleaning
Solution Approach 1:
The scraper assembly is divided into multiple independent flap members (first flap member, second flap member, third flap member) that can move independently. Each flap member has a leading edge, trailing edge, and pivot point, allowing them to function as separate debris management units rather than a single rigid structure.
Solution Approach 2:
The flap members are designed to dynamically change their position and orientation based on the direction of movement. During forward movement, they pivot to a first position to guide debris forward; during reverse movement, they pivot to a second position to prevent pile-up at the rear. This dynamic adaptation eliminates debris accumulation without requiring complex active control systems.
2Productivity
If the vacuum cleaner moves in reverse, then cleaning coverage is improved, but debris pile-up increases
Solution Approach 1:
The flap members automatically adjust their configuration based on movement direction. During reverse movement, they pivot to a second position where the trailing edges face backward, creating a streamlined profile that allows debris to pass through smoothly without accumulating at the rear of the cleaning head.
Solution Approach 2:
The flap members have asymmetric geometry with distinct leading edges and trailing edges. This asymmetry allows them to present different profiles to the airflow and debris during forward versus reverse movement, optimizing performance for both directions without requiring separate scraper assemblies for each direction.
3Ease of operation
If a fixed scraper design is used, then manufacturing is simple, but cleaning effectiveness varies with direction
Solution Approach 1:
The flap members are designed to passively respond to airflow and debris forces, automatically pivoting to appropriate positions during forward and reverse movement. This passive dynamic behavior achieves direction-adaptive cleaning effectiveness without requiring motors, sensors, or complex control mechanisms.
Solution Approach 2:
The same flap member assembly performs multiple functions: during forward movement, it guides debris toward the collection area; during reverse movement, it prevents pile-up by allowing debris to pass through. This multi-functionality is achieved through the inherent mechanical design rather than separate specialized components for each function.
Data Source
AI summary
The present disclosure is generally directed to a scraper assembly for a vacuum cleaning head. The scraper assembly is configured to pivot to a first closed position when the head is moving in a forward direction, and configured to pivot to a second open position when the head is moving in reverse direction.