Retractable Power Cable Assembly for Headset Battery Slack Control
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Solution Overview
Problem
Head-mountable displays face challenges in achieving suitable battery life while maintaining functionality and socially acceptable size, with the inclusion of an auxiliary battery complicating cable management due to excessive slack and inconvenience during mobile use.
Innovation Solution
A retraction device is integrated into the head-mountable assembly to manage the power cable, utilizing a torsion spring and motor to adjust cable length based on sensor inputs and user interface controls, with a spool mechanism to collect and store the cable.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If an auxiliary battery is included in the head-mountable assembly, then battery life is extended, but cable management becomes complicated due to excessive slack
Solution Approach 1:
The cable management system transitions from a static fixed-length cable to a dynamic retractable cable that can automatically adjust its extended length based on the distance between the head-mounted display and the auxiliary battery, eliminating excessive slack while maintaining connectivity
2Ease of operation
If a retractable cable system is implemented, then cable slack is reduced, but device complexity increases
Solution Approach 1:
The retraction device operates autonomously using a spring mechanism that automatically reels in the cable when slack is detected, eliminating the need for manual intervention or complex electronic control systems while maintaining effective cable management
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 retraction device effectively manages cable length, reducing slack and inconvenience, enhancing user experience by maintaining battery life and convenience during mobile use.
Implementation Method 1
The retraction device can include a torsion spring
Implementation Method 2
The retraction device can include a motor that actuates the retraction device in response to an input
Data Source
AI summary
A head-mountable device assembly can include a display, a power unit, a cable electrically connecting the display and the power unit, and a retraction device configured to collect the cable.