Magnetic Hinge for Head-Mounted Display Stress Reduction
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Solution Overview
Problem
Head-mounted display devices face challenges in incorporating electrical components like transmission lines due to stress issues when folded, leading to potential damage.
Innovation Solution
A magnetic hinge design with rear and front magnetic components, including negative and positive polarity regions, that allows the transmission line to pass through, enabling stress reduction by adjusting the temple sections' position without damaging the line.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the temple sections are folded towards the front portion to enable compact storage or non-wearing state, then the device portability is improved, but the transmission line experiences stress and potential damage
Solution Approach 1:
A magnetic hinge mechanism is introduced as an intermediary between the temple section and front portion. This hinge includes magnetic components that create controlled magnetic forces (attraction and repulsion) to guide the folding motion, ensuring the transmission line passes through smoothly without excessive stress or bending, thus protecting the line while enabling compact folding
2Device complexity
If a traditional hinge mechanism is used to couple the temple section and front portion, then the structural simplicity is improved, but the transmission line experiences stress concentration and damage
Solution Approach 1:
The traditional mechanical hinge (using physical contact, pins, or joints) is replaced with a magnetic hinge system. The magnetic components generate forces without direct mechanical contact, creating a smoother motion path for the transmission line and reducing stress concentration points that would occur in mechanical hinge designs
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 magnetic hinge minimizes stress on transmission lines, extending the lifespan of head-mounted display devices by allowing smooth folding and unfolding without damaging the components.
Implementation Method 1
a first region of the one or more negative polarity regions is adjacent and magnetically attracted to the at least one region of positive polarity
Implementation Method 2
a region of the one or more positive polarity regions is adjacent to and magnetically repelled by the at least one region of positive polarity
Data Source
AI summary
An artificial-reality device is provided. The artificial-reality device includes a frame having at least one temple section (e.g., a frame arm) and a front section, where the front section is configured to hold at least one lens. The artificial-reality device also includes a hinge pivotally coupling the at least one temple section and the front section. The hinge includes: (A) a front magnetic component that includes a static magnet, and (B) a rear magnetic component, coupled to the at least one temple section, that includes: (i) two or more primary magnets oriented so as to be attracted to the static magnet of the front magnetic component, and (ii) at least one secondary magnet, positioned between the two or more primary magnets, oriented so as to be repelled by the static magnet of the front magnetic component.