Floating Pawl Door Stopper with Magnetic Damping
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Solution Overview
Problem
Existing door stopper and door holding arrangements are either tripping hazards, damage the door when opened quickly, or fail to provide a reliable and safe mechanism for panic doors without causing mechanical stress on the door.
Innovation Solution
A door stopper and door holding arrangement featuring a pawl mounted on a receptacle with coordinated weights, allowing it to float above the ground and engage magnetically with a second element on the floor, providing adjustable force and damping to prevent door damage and ensure safe operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking element constantly rolls or slides over the floor surface, then the door stopper can effectively stop the door, but it produces dirt traces and wear on the floor
Solution Approach 1:
The locking element is preliminarily positioned in a raised state before door contact, held there by magnetic attraction between the magnet on the locking element and the ferromagnetic floor element. This preliminary positioning prevents the element from constantly rolling or sliding on the floor, eliminating dirt traces and wear while maintaining door stopping effectiveness when the door activates the mechanism
2Object-generated harmful factors
If the locking element is locked in a raised position and only lowered when needed, then floor wear is avoided, but the door is exposed to high mechanical loads when opened quickly
Solution Approach 1:
A damping element is introduced between the locking element and the floor element to provide beforehand cushioning. When the door is opened quickly, the damping element absorbs the impact energy during the lowering motion of the locking element, preventing high mechanical loads on the door and locking mechanism while still allowing the element to engage properly with the floor depression
3Stability of the object's composition
If the element is embedded in the floor, then it remains stationary and effective, but it gradually becomes dirty and its mobility is restricted
Solution Approach 1:
The system is segmented into two separate elements: a stationary ferromagnetic element embedded in the floor that provides the magnetic attraction point, and a movable locking element with a magnet that hovers above the floor surface. This segmentation allows the floor element to remain clean and stationary while the locking element remains movable and can be easily cleaned, as it does not contact the floor during normal operation
4Ease of manufacture
If the door material is weakened to attach the stop element, then installation is easier, but the door leaf becomes more prone to breaking out
Solution Approach 1:
The mechanical attachment system is replaced with a magnetic field-based system. The locking element uses magnetic attraction to the ferromagnetic floor element to achieve secure engagement without requiring mechanical fasteners that would weaken the door leaf. This substitution eliminates the need to drill holes or attach hardware to the door, maintaining door integrity while providing easy installation through magnetic coupling
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 ensures safe, quick, and reliable door operation without tripping hazards or mechanical stress on the door, effectively managing high-speed door openings and maintaining door integrity.
Implementation Method 1
at least one of the elements has at least one magnet and the respective other element can be attracted by the magnet
Data Source
Figure 1a~1b
Figure 2~5
Figure 6a~6b
AI summary
The arrangement (1) has a leaf element (4) firmly provided at a leaf of a door, where the leaf element and a base element (6) are engageable to each other. The leaf element includes a catch (22), which is bidirectionally tiltable to a base relative to the door leaf. The catch is swingably mounted between a catch nose (24) and a balance clamp (25) on a support (18). The catch nose and the balance clamp have a weight that is balanced to each other such that the catch is maintained in a floating position spaced from the base. A cover is made of deep-drawn sheet metal or plastic.