Binocular Display Light Guide Adjustment Mechanism
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Solution Overview
Problem
Existing binocular display devices face challenges in adjusting the pupillary distance due to component tolerances, leading to difficulties in ensuring that images displayed to each eye are at the same height for comfortable vision.
Innovation Solution
A binocular device with an adjustable pupillary distance arrangement, where at least one light guide is moved relative to the support using a rail and slideway system, with a compliance element to take up slack, allowing for precise alignment and secure attachment via spacers and a screw-and-nut mechanism for manual or motor-driven adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rail and slideway arrangement is used to adjust pupillary distance, then the ability to adjust light guide distance is improved, but the device complexity increases
Solution Approach 1:
The patent implements a dynamic adjustment mechanism where the light guide can move along the nasal bridge support. The rail (11) and slideway plate (14) arrangement enables the light guide to be positioned at different distances from the support, allowing adjustment of pupillary distance to match different user requirements while maintaining a relatively simple overall structure.
2Ease of manufacture
If tolerances of component parts are considered, then manufacturing ease is improved, but image alignment precision deteriorates
Solution Approach 1:
The compliance element (13) acts as a self-adjusting component that automatically compensates for tolerance variations in the assembled parts. By introducing this elastic element between the strip (11) and light guide (5), the system self-regulates to ensure proper alignment and height matching of the images, eliminating the need for extremely tight manufacturing tolerances.
3Reliability
If a compliance element is added to take up slack, then image alignment reliability is improved, but device complexity increases
Solution Approach 1:
The compliance element (13) serves as a pre-installed cushioning component that anticipates and compensates for potential misalignments caused by manufacturing tolerances or assembly variations. This elastic element absorbs dimensional variations and ensures reliable image alignment without requiring complex adjustment mechanisms or additional active 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
Enables reliable, comfortable, and economically advantageous alignment of images for each eye, ensuring proper pupillary distance adjustment and easy assembly, while accommodating eyesight-correcting lenses.
Implementation Method 1
at least one slack takeup means being interposed between said strip and said light guides. In a preferred embodiment, said slack takeup means are constituted by a compliance element interposed between said strip and each light guide.
Data Source
AI summary
The invention relates to a binocular device for displaying information, the device comprising a support for placing on the nose and supporting a right display element and a left display element each designed to be placed in front of an eye and each comprising a light guide for receiving a beam of light rays emitted by a beam generator device towards an inlet face and for propagating the beam to an outlet face where the beam is directed towards the corresponding eye, the binocular device having an arrangement for adjusting the pupillary distance by moving at least one of the light guides relative to said support so as to adjust the distance between the light guides. According to the invention, said light guides are disposed over a said support and are held by a strip disposed over the light guides and secured to said support by means of at least one spacer, at least one slack takeup means being interposed between said strip and said light guides.