Hinge Mechanism for Head-Mounted Display with Cable Passing Portion
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Solution Overview
Problem
Head-mounted displays lack compactness due to the absence of a hinge mechanism in the temple, leading to inferior folding capabilities and increased part count to manage loose cables.
Innovation Solution
A hinge mechanism featuring a shaft portion that supports temple rotation, a cable passing portion to prevent cable loosening, and a biasing mechanism for easy opening and secure attachment, allowing the temple to be folded without altering cable length and reducing part count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If no hinge is provided in the temple and the display unit is placed inside the temple, then the display unit can be integrated into the temple structure, but the temple cannot be folded and compactness is inferior
Solution Approach 1:
The temple is divided into a temple body and a temple tip that can rotate relative to each other about the Z-axis. The hinge mechanism includes a shaft portion with first and second shaft portions facing each other, allowing the temple to be segmented while maintaining structural integrity. This segmentation enables the temple to be folded for compact storage while preserving the integrated display unit configuration.
Solution Approach 2:
The temple structure is transformed from a static rigid structure to a dynamic structure that can rotate between open and closed positions. The hinge mechanism provides rotational freedom about the Z-axis, allowing the temple to adapt between extended wear positions and folded compact positions, while the display unit remains integrated throughout the motion.
2Volume of moving object
If the temple portion is folded with respect to the housing portion, then compactness is improved, but the cable becomes loose requiring additional housing portions
Solution Approach 1:
The cable passing portion is positioned adjacent to the shaft portion in the axial direction, allowing the cable to pass through in a direction orthogonal to the rotation axis. This dimensional arrangement ensures the cable remains taut during folding motion without requiring additional cable management housing, as the cable path is optimized in three-dimensional space.
Solution Approach 2:
The cable passing portion acts as an intermediary structure between the shaft portion and the cable itself. It guides the cable through the hinge mechanism in a manner that prevents loosening during folding, eliminating the need for separate cable management components while maintaining cable integrity.
3Adaptability or versatility
If the temple portion can be spread outward further from the open position, then the opening/closing area is increased, but the hinge mechanism becomes more complex
Solution Approach 1:
The hinge mechanism is segmented into a shaft portion, a slide mechanism, and a biasing portion, each performing a specific function. The slide mechanism allows the center of rotation to move outward independently, enabling extended opening/closing area while keeping each component relatively simple and manageable.
Solution Approach 2:
The hinge mechanism transitions from a fixed-center rotation to a dynamic system where the center of rotation can move outward via the slide mechanism. This dynamic capability increases the opening/closing area while maintaining a relatively simple overall structure through coordinated motion of the segmented components.
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 enables a more compact head-mounted display design with improved durability and ease of use by maintaining cable integrity and reducing the number of parts needed, while enhancing the dustproof and waterproof structure.
Implementation Method 1
The elastic portion may be a torsion spring. As a result, the hinge mechanism can be made compact with simple parts without increasing the number of parts
Data Source
AI summary
[Object] To provide a hinge mechanism that allows a head-mounted display to be made more compact, and a head-mounted display including this hinge mechanism.[Solving Means] A hinge mechanism includes: a shaft portion; and a cable passing portion. The shaft portion supports a housing portion and a temple portion of the head-mounted display in such a way that the temple portion is capable of rotating about one axis between a closed position and an open position relative to the housing portion. The cable passing portion is adjacent to the shaft portion in a direction of the one axis, and allows a cable to pass therethrough in a direction orthogonal to the one axis.