Magnetic Key With Segmented Magnet And Ferrous Shield
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Solution Overview
Problem
Magnetic keys used in healthcare environments pose a risk of causing life-threatening damage due to stray magnetic flux, which can inadvertently disrupt sensitive medical devices and erase critical information, highlighting the need for a solution to contain and direct magnetic flux effectively.
Innovation Solution
A magnetic key design featuring a segmented magnet with a ferrous element above it and protective legs to contain magnetic flux, combined with a protective cap that reduces stray flux when not in use, directing flux lines downwards and shielding sensitive areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a magnetic key is used to unlock locking devices, then the locking system can be activated, but stray magnetic flux may cause damage to sensitive medical devices and erase critical information
Solution Approach 1:
The magnet is divided into multiple segments (e.g., four segments) arranged in a circular pattern, which confines the magnetic flux lines within the key body and reduces stray flux extending outward to sensitive devices
Solution Approach 2:
A ferrous element is introduced as an intermediary component between the segmented magnet and the external environment. This ferrous element acts as a flux shunt that redirects magnetic flux lines downward toward the locking device rather than allowing them to radiate outward and interfere with sensitive equipment
2Object-affected harmful factors
If a protective cap is added to reduce stray flux, then magnetic flux surrounding the key when not in use is reduced, but the device complexity increases
Solution Approach 1:
A protective cap containing a ferrous element is introduced as an intermediary shielding component. This cap acts as a magnetic flux shunt that redirects and contains magnetic flux lines when the key is not in use, preventing stray flux from affecting surrounding sensitive devices
Solution Approach 2:
The protective cap is designed to be placed on the magnetic key in advance when the key is not being used. This preliminary protective action ensures that the magnetic flux is contained before the key is stored near sensitive equipment, preventing potential damage without requiring permanent structural modifications to the key itself
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 significantly reduces stray magnetic flux, minimizing the risk of damage to sensitive equipment and ensuring secure operation in healthcare settings by containing magnetic fields within the key's active area and eliminating residual flux when the key is not in use.
Implementation Method 1
reduce stray magnetic flux around the magnetic key of a magnetic activated locking device by directing flux lines downwards towards the locking device
Implementation Method 2
a ferrous element housed above the segmented magnet
Implementation Method 3
reduce magnetic flux surrounding the key when not in use by providing a protective cap
Data Source
AI summary
A magnetic key comprising: a body; a segmented magnet housed within the body; and a ferrous element housed above the segmented magnet. A protective cap for a magnetic key comprising a body; and a ferrous element housed within the body. A locking system comprises a magnetic key and protective cap.