Magnetic Gap Sealing Element for Sliding Doors
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Solution Overview
Problem
Existing gap sealing solutions for sliding doors, particularly those exposed to weather, face issues with deformation and wear due to changing floor levels, leading to unreliable sealing and reduced longevity, as brushes fail to consistently bridge gaps effectively.
Innovation Solution
A gap sealing element with a metallic middle layer and a textile-like deformable surface, combined with a magnetic adhesive layer, allowing for adjustable installation, flexibility to adapt to irregularities, and protection against obstacles, ensuring reliable sealing and extended service life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a brush is used to seal the gap underneath a sliding door, then the gap can be sealed initially, but the brush deforms and wears accelerated when the floor level changes due to frost
Solution Approach 1:
The patent changes the material parameter from flexible brush to stiff metal sheet, which does not deform with floor level changes. The metal sheet maintains its structural integrity and sealing capability across varying gap widths caused by frost-induced floor movement, thereby resolving the contradiction between sealing reliability and service life.
Solution Approach 2:
The patent employs a composite structure combining a stiff metal middle layer with a deformable textile-like surface element. The metal layer provides stability and resistance to floor level changes, while the textile surface element adapts to irregularities and maintains sealing contact, achieving both durability and reliable sealing under varying conditions.
2Strength
If a stiff metal sheet is used to provide stability, then the gap sealing element gains strength, but it cannot adapt to irregularities in the floor underneath
Solution Approach 1:
The patent combines a stiff metal middle layer with a textile-like deformable surface element. The metal layer provides the necessary structural strength and stability, while the textile surface element offers flexibility to conform to floor irregularities, thus resolving the contradiction between strength and adaptability.
Solution Approach 2:
The patent applies different material properties to different parts of the gap sealing element. The middle layer uses stiff metal for overall structural support, while the front surface uses flexible textile material for local adaptation to floor irregularities. This local differentiation of material qualities enables both strength and adaptability simultaneously.
3Ease of operation
If a magnetic adhesive layer is used for mounting, then the gap sealing element can be easily positioned and adjusted, but displacement forces parallel to the door leaf are lower than pull-off forces
Solution Approach 1:
The patent replaces traditional mechanical mounting systems (screws, clips) with a magnetic adhesive layer. This substitution allows the gap sealing element to be easily positioned and adjusted during installation while maintaining secure attachment. The magnetic force provides sufficient holding strength without requiring high displacement forces, resolving the contradiction between ease of operation and force requirements.
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 solution provides a durable, adjustable, and effective sealing solution that maintains gap closure despite changes in floor levels and protects against rodents, with a combination of strength and flexibility, ensuring reliable sealing and extended service life.
Implementation Method 1
The back of the gap sealing element is provided with a magnetic adhesive layer. The magnetic assembly ensures high pull-off forces perpendicular to the surface normal of the door leaf or the gap sealing element and thus causes an excellent hold of the gap sealing element on the door.
Data Source
Figure 1~2
AI summary
The invention proposes a gap sealing element (1) which is designed as an elongated strip which has an angled area (5) at one of its narrow ends and has a rear adhesive layer (3) which is magnetically designed, a middle layer (2) made of metal, and a front layer which is designed as a textile-like deformable surface element (4) and projects beyond the middle layer (2).