Dynamic Magnetic Coupling for Secure Device Attachment
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Solution Overview
Problem
Existing electronic apparatuses with removable tablet PCs and accessory devices face issues with accidental separation during handling, leading to potential falls, and have complex release mechanisms that decrease user-friendliness.
Innovation Solution
An electronic apparatus with a coupling mechanism that includes state and intention detectors, and a control unit to manage the coupling strength between a tablet PC and an accessory device, using magnets and a moving part actuated by a shape-memory alloy to adjust the attractive force, allowing secure attachment and easy detachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a magnet is used to couple the tablet PC and accessory device, then the devices can be easily attached and detached, but the coupling state may be accidentally released during handling
Solution Approach 1:
The magnetic coupling strength is made dynamically adjustable through the moving part that changes the distance between magnets. The system transitions from a fixed coupling strength to a variable one, allowing strong coupling during stable positioning and weaker coupling during detachment operations, thus resolving the contradiction between ease of operation and reliability
Solution Approach 2:
The magnetic coupling parameter (attractive force) is changed by adjusting the position of the moving part. By varying the distance between the first and second magnets, the system can switch between strong coupling for stability and weak coupling for easy detachment, addressing both reliability and ease of operation requirements
2Reliability
If a complex release structure is used to prevent accidental separation, then the coupled state remains stable, but the user-friendliness decreases due to difficult detachment
Solution Approach 1:
The release mechanism uses a moving part that can be actuated by user input to dynamically change the magnetic coupling strength. This allows the system to maintain stable coupling during normal use while enabling easy detachment when the user activates the moving part, eliminating the need for complex mechanical release structures
Solution Approach 2:
The patent replaces complex mechanical release structures with a magnetic field-based control system. By using magnets and a moving part to adjust magnetic attraction force, the system achieves both stable coupling and easy detachment without relying on complicated mechanical latches or buttons
3Reliability
If strong magnetic attraction is used to secure the devices, then accidental separation is prevented, but the devices become difficult to separate when intended
Solution Approach 1:
The magnetic attraction force is made dynamic rather than fixed. The moving part allows the system to adjust the magnetic coupling strength in real-time, providing strong attraction for accident prevention during stable positioning and weak attraction for easy intentional separation when needed
Solution Approach 2:
The magnetic coupling parameter is changed by varying the distance between magnets through the moving part. This parameter adjustment enables the system to switch between strong magnetic attraction for security and weak attraction for ease of separation, resolving the contradiction between reliability and ease of operation
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
Prevents accidental separation and enhances user-friendliness by securely attaching the devices during stable positions and allowing easy detachment when intended, using a compact and lightweight design.
Implementation Method 1
a first magnet provided in the accessory device, a second magnet provided in the portable information device to be able to be attracted to the first magnet
Implementation Method 2
a moving part having a shape-memory alloy provided in the accessory device to deform elastically when reaching a predetermined temperature or higher so as to move the first magnet
Data Source
AI summary
There is provided an electronic apparatus capable of separating a portable information device and an accessory device easily while preventing the coupled state of both devices from being released accidentally. The electronic apparatus includes: a state detector provided in either the portable information device or the accessory device to detect whether the electronic apparatus is in a predetermined stable position; an intention detector that detects whether there is an intention of detaching the portable information device from the accessory device; and a control unit that operates a coupling mechanism when it is detected from an output of the state detector that the electronic apparatus is in the stable position, and when it is detected from an output of the intention detector that there is the intention of detaching the portable information device from the accessory device.