Adjustable Band Tension Control for Head-Mountable Devices
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Solution Overview
Problem
Head-mountable devices (HMDs) lack adjustable tension systems that can adapt to user preferences, activity types, and duration of use, leading to discomfort and misalignment during extended wear.
Innovation Solution
Incorporating force transducers and tension adjustment systems, including cables and dials, that automatically or manually adjust the band tension based on detected forces and user profiles, ensuring optimal fit and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a fixed tension headband is used, then the device structure is simple, but user comfort and alignment deteriorate during extended wear
Solution Approach 1:
The headband tension is made dynamically adjustable through a motor-driven cable system that can modify the effective cable length in real-time, allowing the system to adapt to changing user needs and wear duration rather than maintaining a fixed tension state
Solution Approach 2:
Force transducers provide feedback on the actual tension applied to the headband, enabling the control system to detect when adjustment is needed and automatically modify cable length to maintain optimal tension levels throughout extended wear periods
2Manufacturing precision
If manual tension adjustment is provided, then device complexity is reduced, but adjustment precision and responsiveness deteriorate
Solution Approach 1:
The manual mechanical adjustment mechanism is replaced with an automated motor-driven cable system controlled by force transducer feedback, eliminating the need for user manual intervention while achieving more precise and consistent tension control
Solution Approach 2:
The system performs self-adjustment by automatically detecting tension levels through force transducers and autonomously modifying cable length via the motor, eliminating the need for user manual adjustment operations
3Reliability
If tension is increased for better alignment, then device stability improves, but user comfort and wearability deteriorate
Solution Approach 1:
The system dynamically changes the tension parameter by adjusting cable length based on real-time force transducer readings, allowing optimal tension levels that maintain device stability while preventing user discomfort from excessive tightness
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
The solution provides improved comfort and alignment by dynamically adjusting tension in response to user preferences, activity types, and duration of use, enhancing the overall user experience and device stability.
Implementation Method 1
a force transducer coupled to the housing. The adjustable band can be adjustable in response to a pressure detected by the force transducer
Data Source
AI summary
A wearable electronic device including a pressure sensor and an adjustable band is disclosed. In an example, a head-mountable device (HMD) includes a display; a housing coupled to the display; a force transducer coupled to the housing; and an adjustable band coupled to the housing, the adjustable band being adjustable in response to a pressure detected by the force transducer.