Vacuum Cleaner Filter Bag Holder Plate With Protected Spring Flap
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Solution Overview
Problem
Existing holding plates for vacuum cleaner filter bags face challenges in opening and closing mechanisms, with sharp bending forces making complete opening difficult and dirt deposition impairing spring function, especially when subjected to suction air flows.
Innovation Solution
The spring element is arranged to have a smaller bending angle than the opening angle, allowing for easier opening and closure, with the spring positioned behind the closure element to avoid air flow obstruction and designed with a degressive spring characteristic for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spring element is arranged with a bending angle smaller than the opening angle, then the passage opening can be opened reliably even with weak suction air flows, but the spring element needs to be positioned behind the closure element which may complicate the structure
Solution Approach 1:
The spring element is positioned in a different spatial dimension (behind the closure element in the opening direction) rather than directly in the flow path, allowing it to function effectively while avoiding interference with the air flow and closure element movement
2Ease of operation
If the spring element is positioned in the flow path to enable opening, then the passage can be opened, but dirt is deposited on the spring causing wear and impaired function
Solution Approach 1:
The spring element is extracted from the direct flow path and positioned behind the closure element, removing it from the harmful environment where dirt particles could deposit and cause wear, while still maintaining its functional role in enabling passage opening
Solution Approach 2:
The closure element acts as an intermediary between the air flow and the spring element, allowing the air flow to act on the closure element which in turn moves the spring element, thereby protecting the spring from direct exposure to dirt particles
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
Enables reliable and wide opening of the passage even with weak suction air flows, reducing wear and maintaining functionality by minimizing dirt deposition on the spring element.
Implementation Method 1
the suction air flow of the vacuum cleaner
Implementation Method 2
the bending force initially increases sharply starting from a closed position
Data Source
Figure 1~3
Figure 4~5
AI summary
The plate (1) has a closing flap (4) arranged on a base plate (2) in a rotatable manner for closing a passage aperture (3). An embossed flat spring (6) is arranged in such a manner that bending angle of the spring in a preset pivoting angular region is smaller than an opening angle of the closing flap. The closing flap is brought from one position to another position by a restoring force of the spring against an opening direction. The spring is arranged in the direction rear to the flap. The spring is made of a metal e.g. spring steel, and plastic e.g. thermosetting elastomer or polymer.