AR Headset Battery Pack Rear Positioning for Symmetric Balance
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Solution Overview
Problem
Existing artificial-reality headset designs often cause discomfort due to uneven weight distribution, as the battery is not optimally positioned to counterbalance the display unit, leading to prolonged use issues.
Innovation Solution
The headset assembly includes a battery pack positioned at the posterior portion of the user's head, coupled with adjustable head straps that counterbalance the weight of the headset, ensuring symmetric balance along the user's head axis, regardless of strap adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the battery is positioned in the front or center of the headset, then the headset structure is simpler, but the weight distribution becomes uneven causing discomfort during extended wear
Solution Approach 1:
The battery pack is repositioned from the front/center of the headset to the back of the headset, creating a counterbalancing weight distribution. This counterweight arrangement offsets the weight of the display unit and other front-mounted components, achieving symmetric balance along the vertical axis of the headset and eliminating the forward pull that causes discomfort during extended wear.
2Stability of the object's composition
If the battery pack position is fixed, then the weight balance is maintained, but the headset cannot accommodate different head sizes and shapes
Solution Approach 1:
The headset incorporates adjustable head straps that allow the battery pack position to be dynamically adjusted along the back of the headset. This dynamic positioning capability enables the fixed-weight battery pack to maintain proper balance while adapting to different head sizes, shapes, and user preferences, combining weight stability with structural adaptability.
Solution Approach 2:
The head straps are designed as separate, adjustable components that independently control the positioning of the battery pack and other headset elements. This segmentation allows fine-tuning of the battery pack's location along the back of the headset to achieve optimal weight distribution for each user's unique head geometry.
3Strength
If heavier materials are used for the battery pack housing, then the structural strength is improved, but the overall weight increases causing more discomfort
Solution Approach 1:
The battery pack housing and headset components utilize composite materials that provide high structural strength-to-weight ratios. This allows the battery pack to maintain its protective housing and structural integrity while minimizing additional weight, and the counterbalancing effect of rear positioning compensates for any residual weight imbalances.
Data Source
AI summary
An artificial-reality headset assembly includes an artificial-reality headset, a battery pack, and a plurality of head straps. One end of each of the head straps is coupled to the artificial-reality headset and the respective opposite end is coupled to the battery pack. The plurality of head straps includes one or more side straps configured to be worn around a user's head. The battery pack is located in proximity to a posterior portion of the user's head when the artificial-reality headset is worn. The position and weight of the battery pack function to counterbalance weight of the artificial-reality headset, creating a symmetric balance along an axis of the user's head and maintaining the position of the battery pack regardless of adjustment to the one or more side straps. In some embodiments, the plurality of head straps includes an overhead strap (e.g., an adjustable ergonomic strap).