Magnetic Helmet Fastening with Self-Centering Snap Lock
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Solution Overview
Problem
Existing fastening devices for functional units, such as communication or sensor units, in head-protective gear lack reliable and intuitive attachment mechanisms, especially when users wear gloves or cannot see the units, leading to inaccurate positioning and insecure attachment.
Innovation Solution
A fastening device utilizing pairs of magnets, with at least one active and one passive magnet, to provide a strong attractive force for self-centering and secure attachment, combined with inclined abutment surfaces and a mechanical locking unit, including a snap-lock mechanism and a securing element, to facilitate easy and secure attachment and detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical fastening device is used without magnetic attraction, then the device structure is simpler, but the positioning accuracy and attachment reliability are insufficient, especially when users wear gloves or cannot see the units
Solution Approach 1:
The patent combines magnetic attraction mechanism with mechanical fastening structure into a unified system. The magnets are integrated into the functional unit and receiving unit, working together with the abutment surfaces and locking elements to provide both automatic positioning and secure mechanical attachment, resolving the contradiction between reliability and complexity
Solution Approach 2:
The magnetic attraction provides preliminary positioning and centering action before the mechanical locking engages. The magnets guide the functional unit to the correct position on the receiving unit, ensuring accurate alignment before the abutment surfaces contact and the locking mechanism activates, thereby improving attachment reliability without requiring complex alignment procedures
2Ease of operation
If the fastening mechanism requires precise manual alignment, then the attachment can be secure, but the ease of operation deteriorates when users wear gloves or cannot see the units
Solution Approach 1:
The magnetic fastening system performs self-alignment and self-centering without requiring user intervention for precise positioning. The functional unit is attracted to the receiving unit by magnetic force, automatically finding its correct position on the abutment surface, eliminating the need for manual alignment while maintaining secure attachment
Solution Approach 2:
The patent replaces manual mechanical alignment with magnetic field-based positioning. Instead of requiring users to manually align the units visually or by touch, the magnetic attraction field guides the functional unit to the correct position automatically, significantly improving ease of operation for users wearing gloves or operating in conditions where visual confirmation is difficult
3Reliability
If strong magnetic attraction is used for secure attachment, then the attachment reliability improves, but the difficulty of detachment increases
Solution Approach 1:
The fastening mechanism transitions from a static magnetic attraction to a dynamic system where the magnetic force can be easily overcome. The functional unit can be detached by applying a simple pulling force that exceeds the magnetic attraction, allowing the units to separate cleanly without requiring complex release mechanisms, thus maintaining both secure attachment and easy detachment
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 reliable, intuitive, and secure fastening of functional units to receiving units, even when users wear gloves or cannot see the units, with the magnets providing a strong self-centering effect and the mechanical locking system ensuring secure attachment and easy detachment.
Implementation Method 1
at least one pair of magnets, at least one functional unit magnet being allocated at or close to the functional unit abutment surface, and at least one receiving unit magnet being allocated at or close to the receiving unit abutment surface, said magnets of said at least one pair of magnets exerting an attractive force to each other
Data Source
AI summary
A fastening device for releasably fastening a functional unit in a connection direction to a receiving unit. The fastening device comprises a functional unit comprising a functional unit abutment surface and a receiving unit comprising a receiving unit abutment surface. The functional unit abutment surface and the receiving unit abutment surface are configured to abut against each other in a connected state. The fastening device comprises at least one pair of magnets comprising at least one functional unit magnet allocated at or within a proximity to the functional unit abutment surface and at least one receiving unit magnet allocated at or within the proximity to the receiving unit abutment surface. The at least one functional unit magnet and the at least one receiving unit magnet exert an attractive force to each other.