Head-Mounted Device Frame Isolation via Damping Coupling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Head-mounted electronic devices face optical component misalignment due to excessive stress from drop events or wear, leading to potential deformation and misalignment of internal frames supporting optical modules and cameras.
Innovation Solution
An internal frame is isolated from the housing using a vibration damping coupling member, preventing plastic or elastic deformation during stress events, and hard stop structures are employed to limit over-travel and prevent misalignment of optical components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the internal frame is rigidly coupled to the housing, then structural strength is improved, but optical component alignment deteriorates due to stress transmission during drop events
Solution Approach 1:
The housing is divided into an outer housing and an inner housing that are separable and can move independently relative to each other. The optical components are mounted on the inner housing, which can move independently to absorb impact forces, preventing stress transmission to the optical components while maintaining structural integrity.
Solution Approach 2:
A cushioning member is introduced between the outer housing and the inner housing to act as an intermediary that absorbs and dissipates impact forces. This cushioning member prevents direct stress transmission from the outer housing to the inner housing and optical components during drop events, while still allowing the structures to be coupled.
2Object-affected harmful factors
If the housing is made deformable to absorb impact, then drop protection is improved, but optical component alignment deteriorates due to housing deformation
Solution Approach 1:
The housing is segmented into outer and inner housings that can deform independently. The outer housing can deform to absorb impact energy while the inner housing remains relatively stable, protecting the optical components mounted on it from both the impact forces and the deformation stresses.
Solution Approach 2:
The cushioning member serves as a mediator that allows the outer housing to deform and absorb impact while preventing this deformation from being directly transmitted to the inner housing. This isolates the optical components from the harmful effects of housing deformation.
3Manufacturing precision
If the internal frame is isolated from the housing, then optical component alignment is improved, but structural strength deteriorates due to reduced stress distribution
Solution Approach 1:
The housing is segmented into coupled but independently movable outer and inner housings. The coupling structures provide sufficient mechanical strength and stress distribution while allowing relative movement to isolate the optical components from impact forces, achieving both structural integrity and alignment protection.
Solution Approach 2:
Flexible coupling structures and cushioning members are used to connect the outer and inner housings. These flexible elements provide mechanical strength and stress distribution while allowing relative movement and deformation, isolating the optical components from impact forces without compromising overall structural integrity.
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 ensures that optical components remain aligned and undistorted, even during deformation of the housing, maintaining proper alignment and functionality of the device.
Implementation Method 1
The internal frame may be coupled to a central portion of the housing with a coupling member such as a coupling member formed from a vibration damping material
Data Source
AI summary
An electronic device may have a housing that separates an exterior region from an interior region. The housing may have a front layer on a front face of the housing and a rear layer on an opposing rear face of the housing. Sidewall structures may extend between the front and rear layers. The housing may form a head-mounted housing that is configured to be worn on a user's head. An internal frame may be mounted in the interior region. The internal frame may have a nose bridge structure that is coupled to the housing with a coupling member such as a coupling member formed from an elastomeric vibration damping material. Other portions of the frame such elongated laterally extending support members may not contact any portion of the housing and may therefore be isolated from the housing during drop events.