HMD Counterweight Layout for Balanced Torque and Secure Fit
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Solution Overview
Problem
HMD devices for medical applications face challenges in wearing comfort and secure retention due to torque caused by the weight of the display device, which can lead to tilting and compromised safety, and tightening the carrier device further worsens comfort.
Innovation Solution
Incorporating a counterweight member on the carrier device opposite to the display device to counteract the torque, with adjustable weight and position to balance the center of gravity at the cervical spine, and allowing flexible adjustment of counterweight torque through multiple counterweight members and variable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the carrier device is tightened more on a user's head to prevent tilting of the HMD device, then the secure retention of the HMD device is improved, but the wearing comfort deteriorates
Solution Approach 1:
The patent applies a counterweight member arranged on the carrier device to generate a counterweight torque that opposes the display device torque. This counterweight torque prevents the HMD device from tilting forward, securing retention without requiring excessive tightening of the carrier device, thereby maintaining wearing comfort.
2Ease of operation
If the carrier device is not properly secured to the head, then the wearing comfort is improved, but the HMD device tilts and may fall, compromising safety
Solution Approach 1:
The counterweight member creates a balancing torque that prevents tilting, allowing the carrier device to be worn comfortably without excessive tightening while still maintaining secure retention and preventing the device from falling.
3Measurement precision
If the weight of the display device is increased to improve image quality, then the image display accuracy is improved, but the torque on the user's neck increases, deteriorating wearing comfort
Solution Approach 1:
The counterweight member generates a counterweight torque that balances the increased torque from a heavier display device. This allows high-quality image display with increased weight while maintaining wearing comfort by preventing excessive neck strain.
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
This solution significantly improves wearing comfort and secure retention of the HMD device, reducing torque on the neck and preventing tilting, thereby enhancing safety and usability during medical procedures.
Implementation Method 1
the counterweight torque caused by the weight force of the counterweight member counteracts the display device torque caused by the weight force of the display device
Implementation Method 2
the counterweight torque caused by the weight force of the counterweight member counteracts the display device torque caused by the weight force of the display device
Data Source
AI summary
The present invention relates to a HMD device (1), comprising:at least one display device (10) for displaying a captured image,a carrier device (20) to which the at least one display device (10) is attached and having at least one attachment portion for attachment to a head of a user, and at least one counterweight member (21) via which a counterweight force against the weight force of the at least one display device is applicable, whereinthe at least one counterweight member (21) is arranged on the carrier device (20) such that the counterweight torque caused by the weight force of the counterweight member (21) counteracts the display device torque caused by the weight force of the display device (10).