Optical Housing Ball Joint Alignment Mechanism
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Solution Overview
Problem
Conventional image providing apparatuses face difficulties in aligning the central position of the optical axis with the pupil's center during eye relief adjustments, requiring cumbersome adjustments of the nose pad to compensate for vertical displacement.
Innovation Solution
An image providing apparatus with a ball joint connecting the optical housing to a supporting member, featuring a rod member with bent sections and ball portions, allowing for conical-movable adjustments to maintain posture and align the optical axis with the pupil center without needing frequent nose pad adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the optical housing is moved closer to the eye to adjust eye relief, then the eye relief is improved, but the central position of the optical axis is displaced vertically (upward)
Solution Approach 1:
The patent applies dynamics by making the connecting member movable rather than fixed. The rod member with bent sections allows the optical housing to move dynamically in multiple directions, enabling the optical axis to be repositioned vertically and horizontally to maintain alignment with the pupil center during eye relief adjustment.
Solution Approach 2:
The connecting member is segmented into a rod member with first and second bent sections, allowing independent adjustment in different directions. This segmentation enables the system to decouple the eye relief adjustment from the alignment maintenance, resolving the contradiction between ease of operation and alignment precision.
2Manufacturing precision
If the nose pad is shifted to compensate for vertical displacement of the optical axis, then the alignment is improved, but the device complexity and ease of operation deteriorate due to troublesome adjustments
Solution Approach 1:
The connecting member serves multiple functions: it provides structural support, enables eye relief adjustment, and maintains optical axis alignment. This multi-functionality eliminates the need for separate nose pad adjustment mechanisms, reducing device complexity while maintaining alignment precision.
Solution Approach 2:
The movable connecting member enables the system to self-adjust and maintain alignment automatically during eye relief adjustment, without requiring manual intervention to shift the nose pad. This self-service capability reduces both device complexity and operational burden.
3Stability of the object's composition
If a rigid connecting structure is used between optical housing and head gear, then the structural stability is improved, but the adaptability to different users and adjustment flexibility deteriorate
Solution Approach 1:
The patent replaces the rigid connecting structure with a dynamic movable connecting member. The rod member with bent sections can flex and adjust its configuration, providing both structural stability and adaptability to different users' anatomical variations and preferences.
Solution Approach 2:
The connecting member allows changes in geometric parameters (angles and positions of bent sections) to adapt to different users while maintaining structural integrity. This parameter variability enables customization without sacrificing structural stability.
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
Enables precise alignment of the optical axis with the pupil center during eye relief adjustments, simplifying the fitting process and reducing the trouble associated with vertical displacement issues.
Implementation Method 1
the ball portions 54 and 55 are in contact with container surfaces 53a and 53b, respectively, which are in opposition to each other with a predetermined frictional force therebetween
Data Source
AI summary
Provided is an image providing apparatus having connecting member connecting a head set and optical housing capable of adjusting displacement of the optical housing in the vertical direction to the eyeball of the observer when adjusting the eye-relief of the optical housing to the eyeball of the observer. The ball joint has ball portions respectively on two ends thereof, on one of the ends (upper ends) is provided to the supporting member side capable of maintaining a posture thereof, and the ball portion on another ends (lower ends) is provided to the optical housing side for maintaining a posture thereof. The connecting member has a first member and a second member, the first member is connected to the second member so as to be movable and capable of maintaining a posture thereof.