Vacuum Cleaner Filter Bag Retaining Plate with Sheathed Spring Sealing
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Solution Overview
Problem
Existing retaining plates for vacuum cleaner bags often fail to ensure reliable sealing due to dust accumulation between the coils of coil springs, leading to incomplete closure of the sealing flaps.
Innovation Solution
The use of an elastic element comprising an elastomer or a coil spring partially enclosed by a sheath prevents dirt accumulation, ensuring consistent spring force and effective sealing. The elastic element is arranged in front of the sealing flap, ensuring it remains inside the filter bag to maintain suction material containment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coil spring is used as the elastic element, then the sealing mechanism can be realized, but dust accumulates between the coils leading to unreliable sealing
Solution Approach 1:
A sheath is introduced as an intermediary component that encloses the coil spring, preventing dust particles from accumulating between the coils while allowing the spring to maintain its sealing function. The sheath acts as a barrier between the elastic element and the dust environment.
Solution Approach 2:
The sheath is implemented as a flexible enclosing structure that covers the coil spring, creating a protective barrier against dust accumulation while permitting the spring's mechanical movement and force application to the sealing flap.
2Reliability
If the elastic element is enclosed by a sheath, then dust accumulation is prevented, but the device complexity increases
Solution Approach 1:
The sheath is implemented as a simple flexible enclosing structure that covers the coil spring, creating a protective barrier against dust accumulation while permitting the spring's mechanical movement and force application to the sealing flap.
3Reliability
If an elastomer is used instead of a coil spring, then dust accumulation is prevented, but the spring force consistency may be affected
Solution Approach 1:
The elastic element is changed from a metal coil spring to an elastomeric material, fundamentally altering the material parameters and mechanical properties. This substitution eliminates the dust accumulation issue inherent to coil structures while maintaining the necessary elastic restoring force through the elastomer's material characteristics.
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
This solution enhances the functional reliability of the sealing mechanism, preventing dust leakage and allowing for cost-effective large-scale production, ensuring the sealing flap remains closed even when the vacuum cleaner filter bag is removed.
Implementation Method 1
an elastic element (7), in particular a coil spring, which is connected to the base plate (21) and to the sealing flap (5) and which acts on the sealing flap (5) with a spring force in the closed position
Data Source
AI summary
The invention relates to a retaining plate (2) for a vacuum cleaner filter bag, comprising a base plate in which a passage opening (3) is formed, and a sealing flap (5) for sealing the passage opening (3), wherein the sealing flap (5) is biased in the sealed position via an elastic element (7), wherein the elastic element (7) is arranged in front of the sealing flap (5) when viewed in the sealing direction; and wherein the elastic member (7) comprises an elastomer, or the elastic member (7) comprises a coil spring (9), wherein the coil spring (9) is at least partially enclosed by a sheath (10).