Rotatable Magnet Door Sealing System
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Solution Overview
Problem
Existing door systems with magnetic sealing devices require high operating forces due to strong static friction, making them difficult to operate manually and inefficient in automatic systems, and can lead to jamming and tripping hazards.
Innovation Solution
A door system design featuring a rotatable magnet on the door leaf with a cylindrical cross-section and a concave surface, interacting with a first magnet on the sealing strip, allowing for low-force operation and a spacer element with low friction to facilitate easy rotation, along with a restoring device and additional magnets for enhanced sealing and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnets are used to hold the sealing strip in position, then sealing reliability is improved, but operating force increases due to static friction
Solution Approach 1:
The patent applies the dynamics principle by making the second magnet rotatable rather than fixed. The second magnet is mounted on a rotation axis, allowing it to change its magnetic pole orientation dynamically. When the door leaf moves, the second magnet rotates to present opposite magnetic poles to the first magnet on the sealing strip, creating alternating attraction and repulsion forces that reduce static friction and enable easier operation while maintaining sealing reliability.
2Reliability
If high magnetic attraction force is used to hold the sealing strip, then sealing effectiveness is improved, but the door system becomes harder to operate manually
Solution Approach 1:
The patent applies the dynamics principle by making the second magnet rotatable rather than fixed. The second magnet is mounted on a rotation axis, allowing it to change its magnetic pole orientation dynamically. When the door leaf moves, the second magnet rotates to present opposite magnetic poles to the first magnet on the sealing strip, creating alternating attraction and repulsion forces that reduce static friction and enable easier operation while maintaining sealing reliability.
3Force
If magnets are placed close together to maximize attraction, then sealing force is improved, but jamming risk increases
Solution Approach 1:
The patent applies the dynamics principle by making the second magnet rotatable rather than fixed. The second magnet is mounted on a rotation axis, allowing it to change its magnetic pole orientation dynamically. When the door leaf moves, the second magnet rotates to present opposite magnetic poles to the first magnet on the sealing strip, creating alternating attraction and repulsion forces that reduce static friction and enable easier operation while maintaining sealing reliability.
Solution Approach 2:
The patent applies the periodic action principle through the rotational movement of the second magnet. As the door leaf moves, the second magnet periodically rotates to present different magnetic poles to the first magnet, creating a periodic sequence of attraction and repulsion forces. This periodic variation in magnetic interaction prevents continuous high static friction and reduces jamming risk while maintaining effective sealing force.
4Device complexity
If a fixed magnet arrangement is used, then device complexity is reduced, but operational reliability decreases due to jamming
Solution Approach 1:
The patent applies the dynamics principle by making the second magnet rotatable rather than fixed. The second magnet is mounted on a rotation axis, allowing it to change its magnetic pole orientation dynamically. When the door leaf moves, the second magnet rotates to present opposite magnetic poles to the first magnet on the sealing strip, creating alternating attraction and repulsion forces that reduce static friction and enable easier operation while maintaining sealing reliability.
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 reduces the operating forces required for sealing, enhances functional reliability, and prevents direct contact between magnets, improving accessibility and reducing the risk of jamming and tripping hazards.
Implementation Method 1
the sealing strip is lifted by the attractive force of a second magnet arranged in the door leaf
Implementation Method 2
the sealing strip is acted upon in its non-sealing or in its sealing position, depending on the rotational position of the second magnet
Implementation Method 3
The spacer element is advantageously made of a material with a low coefficient of friction, at least on its outer surfaces. This ensures that the rotatable magnet can be rotated relative to the first magnet with little effort
Implementation Method 4
the second rotatable magnet is operatively connected to a restoring device, e.g. a spring, which rotates the rotatable magnet back to its basic position after the actuation element has been released
Implementation Method 5
the sealing strip falls back into its sunken position under the effect of gravity
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The system (1) has a sealing device (11) comprising a magnet, which moves a sealing strip (12) based on position of a door wing (2) and is arranged at the sealing strip. The magnet cooperates with another magnet that is arranged at the door wing. The latter magnet is rotatably supported at the door wing. The sealing strip is pressurized based on rotation position of the latter magnet in a non-sealing position and/or a sealing position. A distance element is arranged between the two magnets. The sealing device comprises an actuating element.