Foldable Vision Therapy Device with Articulated Head Support
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Solution Overview
Problem
Existing visual field testing and therapy devices are cumbersome, making it difficult to accurately position users relative to the display, especially in non-clinical settings, leading to misalignment and reduced effectiveness of therapeutic sessions, and are not easily portable for home or rehabilitation use.
Innovation Solution
An adjustable device with a chinrest and articulated arm for precise head positioning, featuring manual and automatic adjustment options, including eye-tracking for optimal alignment, and a foldable design for portability, along with antiglare components and safety features to prevent toppling and spurious data accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the device is made bulky to provide stable visual field testing and therapy, then the stability and accuracy of positioning are improved, but the portability and ease of transport deteriorate
Solution Approach 1:
The device is divided into separable components including a display unit, chinrest assembly, and base that can be disconnected and stored separately, enabling accurate positioning functionality to be maintained while improving portability through individual component transport
Solution Approach 2:
The chinrest and display are connected via an articulated arm with adjustable degrees of freedom, allowing the structure to dynamically adapt its configuration between a stable extended position during use and a compact folded position for transport, resolving the contradiction between stability and portability
2Measurement precision
If manual adjustment mechanisms are added to position the chinrest and display, then the positioning precision is improved, but the device complexity increases
Solution Approach 1:
The system incorporates sensors that automatically detect the user's head position and autonomously adjust the chinrest and display angles without requiring manual intervention, achieving high positioning precision while minimizing the complexity of user interaction with adjustment mechanisms
Solution Approach 2:
Manual mechanical adjustment controls are replaced with automated sensor-based positioning systems that use optical or mechanical sensors to detect head position and automatically actuate motors to achieve precise alignment, reducing the operational complexity while maintaining high positioning accuracy
3Stability of the object's composition
If the chinrest provides strong support force to hold the user's head, then the positioning stability is improved, but the safety risk of toppling increases
Solution Approach 1:
The base incorporates a counterweight mechanism that balances the forward force exerted by the user's head on the chinrest, creating a stable equilibrium that prevents toppling while maintaining secure head positioning during therapy sessions
Solution Approach 2:
The chinrest includes a force-sensitive mechanism that detects excessive downward force and automatically collapses or disengages before toppling can occur, providing a safety buffer that prevents harmful toppling while maintaining stable positioning under normal use conditions
Data Source
AI summary
An adjustable and foldable device for visual field testing or treatment includes a computer display mounted on a base and presents visual stimuli to the patient. An associated head support assembly with a chinrest supports and positions the head of the subject with respect to the display. An articulated arm joins the base and the head support assembly. The arm will resist a given downward force supplied by the head, and is foldable toward the display to create a more compact and portable device. Additional articulations may allow the head support assembly to fold upon arm, and the arm to fold upon the base. The device may include a locking mechanism that secures the device in a folded or unfolded configuration.