HMD Strap System with Sliding Rigid Bar and Ratchet Adjustment
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Solution Overview
Problem
Users face difficulties in properly adjusting and comfortably wearing virtual-reality head-mounted displays due to existing technologies, which can negatively impact the immersive experience.
Innovation Solution
A strap system for head-mounted displays comprising a rigid bar with lateral and vertical slots, semi-rigid and rigid segments, compression springs, and an adjustment strap with a coupling structure, allowing for adjustable and secure fitting around the user's head.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If existing head-mounted display technologies are used, then the basic function of virtual reality display is achieved, but the user experiences difficulty in proper adjustment and comfortable wearing
Solution Approach 1:
The strap system incorporates a dynamic adjustment mechanism featuring a rigid bar that can slide within a slot of the head-mounted display, allowing the entire strap assembly to move forward and backward. This dynamic positioning enables users to adjust the overall fit of the device on their head, while the ratchet mechanism provides incremental positioning adjustments through the adjustable strap portion.
Solution Approach 2:
The strap system is divided into distinct functional segments: a rigid bar for structural support and coarse positioning, a ratchet mechanism for secure locking, an adjustable strap for fine-tuning fit, and a headband for comfort. This segmentation allows each component to address specific adjustment needs, collectively solving the problem of achieving both ease of operation and adaptability.
2Strength
If existing head-mounted display technologies are used, then the basic structural support is provided, but the user experience is negatively affected due to improper adjustment difficulty
Solution Approach 1:
The rigid bar is designed to slide within a slot of the head-mounted display, providing dynamic structural support that adapts to different head sizes and preferences. This sliding capability maintains structural integrity while enabling easy adjustment of the device's position on the user's head.
Solution Approach 2:
The rigid bar acts as an intermediary element between the head-mounted display and the strap system. It transmits adjustment forces from the strap mechanism to the display while maintaining structural support, thereby decoupling the strength requirement from the adjustment complexity.
3Ease of manufacture
If a fixed strap system is used, then the manufacturing process is simple, but the user cannot achieve precise positioning and secure attachment
Solution Approach 1:
The ratchet mechanism enables self-service adjustment, allowing users to independently achieve precise positioning without requiring complex manufacturing tolerances. The mechanical ratchet provides inherent positioning precision through its toothed structure, while the adjustable strap allows fine-tuning, all while maintaining relatively simple manufacturing processes.
4Reliability
If existing head-mounted display technologies are used, then the basic functionality is achieved, but secure attachment and precise positioning are difficult to achieve
Solution Approach 1:
The ratchet mechanism serves as an intermediary between the adjustable strap and the rigid bar, providing secure attachment through its one-way locking action. This mechanical intermediary ensures reliable positioning while maintaining ease of operation, as users can simply pull the strap to engage the ratchet without requiring complex locking procedures.
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 easy and customizable adjustment of the head-mounted display system for improved comfort and fit, enhancing the overall user experience by allowing for precise positioning and secure attachment.
Implementation Method 1
one or more compression springs coupled to the rigid segment, and a shuttle to press against the one or more compressions spring so as to slide along the lateral dimension
Data Source
AI summary
A strap system for a head-mounted display system includes a rigid bar having an opening at a first end and a vertical slot situated on an outer surface of the rigid bar. The opening extends within the rigid bar in a lateral dimension. The strap system also includes a rigid segment with an end inserted into the opening of the rigid bar in the lateral dimension, one or more compression springs coupled to the rigid segment, a shuttle to press against the one or more compression springs so as to slide along the lateral dimension, and an adjustment strap fixedly coupled to the shuttle and extending beyond the end of the rigid segment and through the vertical slot on the rigid bar.