Head-Mounted Display Fixation Member for Quiet Length Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wearable head mountable display devices face issues with inconsistent length adjustment due to differential operation when rotated clockwise and counterclockwise, leading to unwanted noise and discomfort, especially in quiet environments.
Innovation Solution
A head mountable display device with a wheel, first and second plates, and a fixation member featuring protrusions that ensure consistent length adjustment operation in both directions, reducing noise and providing secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gear structure is used for length adjustment, then the adjustment mechanism can be compact and easy to operate, but the length cannot be securely fixed in the reduction direction due to asymmetric operation
Solution Approach 1:
The invention applies asymmetry by designing the fixation member with different engagement characteristics for clockwise and counterclockwise rotations. The protrusion geometry and seating groove configuration create asymmetric engagement that allows secure fixation in one direction while maintaining adjustability in the other, directly resolving the contradiction between ease of operation and reliability of fixation.
Solution Approach 2:
The fixation member transitions between different states based on rotation direction: engaged and fixed during clockwise rotation, and disengaged or loosely engaged during counterclockwise rotation. This dynamic behavior allows the system to adapt its fixation strength according to the operational phase, maintaining both ease of adjustment and secure fixation.
2Device complexity
If a one-directional fastening mechanism is used, then the structure can be simple, but unwanted noise is generated during length adjustment
Solution Approach 1:
The invention converts the potential harm of mechanical contact and friction into a beneficial quiet operation. By designing the protrusion and seating groove to engage smoothly with proper clearance and surface finish, the mechanical fastening mechanism operates without generating unwanted noise, transforming what could be a noisy clicking mechanism into a silent adjustment system.
3Device complexity
If the length adjustment device operates differently in clockwise and counterclockwise directions, then the structure can be simplified, but the user experience and operation consistency are degraded
Solution Approach 1:
The fixation member is designed to perform multiple functions: it provides secure fixation during clockwise rotation, allows smooth adjustment during counterclockwise rotation, and maintains consistent operational feel in both directions. This multi-functionality resolves the contradiction by making a single component serve diverse operational requirements without compromising user experience.
Data Source
AI summary
A head mountable display device may include a wheel, a first plate coupled to the wheel and comprising a first seating groove, mountable a gear having a first surface disposed at the first plate, mountable a second plate disposed at a second surface of the gear, which is an opposite surface of the first surface of the gear, and comprising a plurality of second seating grooves along a circumference, and a fixation member having a first surface and a second surface which is an opposite surface of the first surface of the fixation member, wherein the fixation member comprises a protrusion, at least a portion of the first surface of the fixation member disposed in the first seating groove, and at least a portion of the second surface of the fixation member disposed in one of the plurality of second seating grooves, and a body extending from the protrusion. Various other embodiments are possible.