Head-Mounted Display Strap Overlap Adjustment Mechanism
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Solution Overview
Problem
Current head-mounted displays require lengthy adjustments to fit different head sizes due to the need for fine-tuning the strap tension and wearing position, which slows down the adjustment process.
Innovation Solution
A head-mounted display design featuring a wearing portion, display body, first and second straps, an adjustment assembly, and a switching assembly that allows for quick adjustment of the strap overlap to change the wearing space, enabling the straps to move freely relative to the adjustment assembly for efficient fitting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the strap length is adjusted to accommodate different head sizes, then the adaptability is improved, but the adjustment time increases
Solution Approach 1:
The strap adjustment mechanism is divided into discrete segments with multiple predetermined positions. The strap can be quickly positioned at different adjustment levels without continuous fine-tuning, enabling users to rapidly select the appropriate size while maintaining adaptability to different head dimensions.
Solution Approach 2:
Multiple predetermined adjustment positions are pre-configured on the strap to match common head sizes. Users can directly select from these pre-prepared positions rather than adjusting from scratch, significantly reducing the time required to achieve a proper fit while maintaining versatility.
2Ease of operation
If the strap tension is fine-tuned for precise fitting, then the comfort is improved, but the adjustment complexity increases
Solution Approach 1:
The strap adjustment mechanism incorporates a dynamic locking system that allows for both quick position changes and secure locking. The mechanism transitions between movable and locked states, enabling users to easily adjust to different positions while maintaining the selected setting without complex adjustment procedures.
Solution Approach 2:
The traditional complex mechanical adjustment system is replaced with a simplified mechanism that uses elastic deformation and geometric constraints to achieve both fine-tuning capability and ease of operation. The elastic component provides automatic tension adjustment while the geometric structure prevents over-adjustment.
3Reliability
If the strap structure is made rigid for stability, then the reliability is improved, but the adjustability decreases
Solution Approach 1:
The strap is divided into rigid structural segments connected by flexible joints. Each segment maintains structural integrity and stability, while the joints between segments provide the necessary flexibility for adjustment. This segmentation allows the strap to be both reliable in its fixed positions and adaptable during adjustment.
Solution Approach 2:
The strap structure utilizes changes in geometric parameters and material properties to achieve both rigidity and flexibility. The rigid portions maintain structural stability while flexible portions enable adjustment. The mechanism transitions between different structural states to provide stability when adjusted and adaptability during the adjustment process.
Data Source
AI summary
A head-mounted display includes a wearing portion, a display body, a first strap, a second strap, an adjustment assembly, and a switching assembly. The display body is connected to the wearing portion. The first strap and the second strap are respectively connected to two opposite sides of the wearing portion. The first strap, the second strap, and the wearing portion define a wearing space, and the first portion of the first strap and the second portion of the second strap are overlapped with each other. The adjustment assembly is adapted to be coupled to the first strap and the second strap and is configured to adjust the degree of overlap of the first portion and the second portion to thereby change the wearing space. The switching assembly is disposed at the adjustment assembly to switch the adjustment assembly to a coupled state or a decoupled state.