Compliant Magnetic Locking Mechanism for Hidden Cover Latching
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Solution Overview
Problem
Existing computing devices rely on screwed or snapped connections for final assembly, which are time-consuming, unsightly, prone to tampering, and reduce recyclability, and suffer from assembly tolerance issues over time.
Innovation Solution
A compliant magnetic locking mechanism using a rotatable hub with magnetic or ferromagnetic inserts and latches, allowing quick and secure attachment/detachment of covers without visible fasteners, accommodating tolerance changes over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screwed or snapped connections are used for final assembly, then the connection strength and structural integrity are improved, but the assembly time increases and cosmetic performance deteriorates
Solution Approach 1:
The patent replaces traditional mechanical screw or snap connections with a magnetic locking mechanism. The magnetic mechanism uses magnetic attraction forces to secure the cover to the device body, eliminating the need for threaded fasteners or elastic snap-fit structures. This substitution maintains connection strength while dramatically reducing assembly time and improving cosmetic appearance by hiding all fasteners.
Solution Approach 2:
The patent changes the fundamental parameter of connection mechanism from mechanical interlocking (screws/snaps) to magnetic field interaction. By utilizing magnetic field strength as the connecting parameter rather than mechanical geometry, the system achieves both strong connections and rapid assembly/disassembly without visible fasteners.
2Strength
If screwed or snapped connections are used for final assembly, then the connection strength is improved, but the cosmetic performance and tamper resistance deteriorate
Solution Approach 1:
By replacing mechanical fasteners with a magnetic locking mechanism, the patent eliminates visible screws and snap connections that can be easily manipulated or seen. The magnetic mechanism provides secure attachment while presenting a clean, uninterrupted surface that resists tampering and maintains cosmetic performance.
Solution Approach 2:
The magnetic field acts as an intermediary between the cover and device body, providing the connecting force without requiring physical contact points or visible fasteners. This intermediary mechanism delivers both strong connection and tamper resistance by distributing the holding force across multiple hidden magnetic inserts.
3Ease of manufacture
If traditional mechanical connections are used, then the assembly process is simple, but the recyclability and ease of disassembly deteriorate
Solution Approach 1:
The magnetic locking mechanism replaces permanent or difficult-to-disassemble mechanical connections with a reversible magnetic system. This substitution maintains manufacturing simplicity while dramatically improving recyclability, as the cover can be easily detached and reattached multiple times without tooling or damage, facilitating component recovery and device refurbishment.
4Loss of time
If magnetic locking mechanism is used, then the assembly time is reduced and cosmetic performance is improved, but the mechanism complexity increases
Solution Approach 1:
The magnetic locking mechanism is segmented into multiple independent magnetic inserts distributed across the connection interface. Each insert provides localized magnetic holding force, and the segmented structure allows for simplified manufacturing of individual components that are then assembled into the complete locking system, balancing complexity with performance.
Solution Approach 2:
The magnetic locking mechanism serves multiple functions simultaneously: it provides secure attachment, enables rapid assembly and disassembly, maintains cosmetic appearance by hiding fasteners, and facilitates recyclability. This multi-functionality justifies the increased mechanism complexity by delivering comprehensive benefits that traditional single-function connections cannot achieve.
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
Provides fast, tamper-resistant, and recyclable assembly of computing device covers, hidden from view, reducing assembly time and costs, and maintaining security and sealing integrity.
Implementation Method 1
a rotatable hub including a first radial arrangement of magnetic or ferromagnetic inserts seated within the mechanism housing
Data Source
AI summary
The presently disclosed compliant magnetic locking mechanisms provide mechanism(s) and method(s) for latching a cover (e.g., a rear cover) to a device body that is quick assembling, low cost, easily recyclable, secure, and/or leaves no exposed fasteners. A bi-stable (or mono-stable) compliant mechanism inside the cover actuates a set of latches in and out. This action serves to lock and unlock the cover or other removable portion of the computing device. The compliant magnetic locking mechanisms may contain an array of magnets, which can be used in conjunction with a magnetic key to actuate the compliant mechanism from the exterior.