Rotatable Hinge Mechanism for Detachable Head-Mounted Display Strap
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Solution Overview
Problem
Head-mounted displays (HMDs) require a robust and adjustable head strap assembly that can accommodate various user head shapes while ensuring a secure and comfortable fit, and also needs to be easily detachable for adjustments or maintenance.
Innovation Solution
A rotatable hinge mechanism for the head strap connector that is removably interlocked to the HMD, featuring a cap with a cavity and cap pins that allow resistive rotation and secure engagement with an end piece, enabling adjustment and easy disconnection for strap adjustments or maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the head strap assembly is made robust and securely interconnected to ensure stable fit for various user head shapes, then the stability and reliability of the HMD are improved, but the ease of disconnection for adjustments or maintenance deteriorates
Solution Approach 1:
The head strap assembly is divided into modular components: head straps, headrest, and hinge mechanisms. Each component can be independently adjusted or removed. The hinge mechanism itself is segmented into movable and fixed portions that can be easily disconnected from the HMD frame, allowing maintenance without removing the entire assembly.
Solution Approach 2:
The hinge mechanism incorporates dynamic elements including rotatable joints and adjustable connections that allow the head strap assembly to adapt to different head shapes while maintaining secure fit. The same dynamic hinge allows easy disconnection through simple rotational or linear movements, resolving the contradiction between secure attachment and easy removal.
2Adaptability or versatility
If the head strap assembly is made adjustable to accommodate various user head shapes, then the adaptability is improved, but the device complexity increases
Solution Approach 1:
The adjustment functionality is segmented into independent mechanisms: hinge rotation for angle adjustment, linear displacement for position adjustment, and modular components for size adaptation. Each segment handles a specific adjustment function, avoiding the need for a complex integrated adjustment system.
Solution Approach 2:
Dynamic hinge mechanisms provide multi-degree-of-freedom adjustment capabilities through simple rotational and translational movements. The same dynamic elements that provide adaptability also simplify the overall structure by replacing complex mechanical adjustment systems with natural human-like movement patterns.
Data Source
AI summary
Embodiments relate to a rotatable hinge for a head strap connector of a head-mounted display (HMD) that is detachable. The rotatable hinge has frictional elements that allow resistive rotation of the head strap connector relative to the HMD. The rotatable hinge has an end piece connected to the head strap connector that may be interlocked with the HMD by inserting the end piece into a cavity of the HMD and rotating the end piece in the cavity. The cavity has pins that pass through the end piece and interlock with walls along the outer edge of the end piece. Once interlocked with the HMD, the pins interlocked with the end piece allow the end piece to pivot relative to the HMD allowing the head strap connector to adjust to the size of a user's head.