Face Cover Diopter Adjustment Mechanism for HMD
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Solution Overview
Problem
Existing head-mounted display apparatuses face challenges in conveniently adjusting the diopter of lenses for user-specific vision correction, often requiring separate structures that increase weight and size, and may be inconvenient when using accessories like face covers.
Innovation Solution
A face cover detachably coupled to a head-mounted display apparatus, featuring a housing with an opening, a lens adjustment member exposed through the opening, and an elastic member providing the necessary force for the lens adjustment member to move and rotate, allowing the lens barrel to adjust the diopter by rotating in opposition to the lens adjustment member's rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate diopter adjustment structures are added to the head-mounted display apparatus, then the diopter can be adjusted for user-specific vision correction, but the weight and size of the apparatus increase
Solution Approach 1:
The patent integrates the diopter adjustment function into the face cover by incorporating a lens adjustment member that contacts the lens barrel. This merging of functions allows the face cover to serve both as a protective accessory and as the diopter adjustment mechanism, eliminating the need for separate adjustment structures and thereby reducing overall weight.
Solution Approach 2:
The face cover is designed with multi-functionality, serving as both a protective cover and a diopter adjustment device. The lens adjustment member integrated into the face cover enables the same component to perform both protection and optical adjustment functions, reducing the need for additional dedicated structures.
2Adaptability or versatility
If separate diopter adjustment structures are added to the head-mounted display apparatus, then the diopter can be adjusted for user-specific vision correction, but the size of the apparatus increases
Solution Approach 1:
The patent combines the diopter adjustment function with the face cover structure. The lens adjustment member is integrated into the face cover housing, allowing the adjustment mechanism to share space with the protective cover rather than requiring separate adjustment components, thereby minimizing volume increase.
Solution Approach 2:
The lens adjustment member is nested within the face cover housing structure. The adjustment mechanism is positioned within the existing face cover volume, utilizing the space already allocated for the protective cover, thus avoiding additional external volume increase.
3Ease of operation
If the lens adjustment member is exposed through the opening in the face cover, then the user can conveniently adjust the diopter while wearing the face cover, but the structural complexity of the face cover increases
Solution Approach 1:
The face cover is segmented with a specific opening portion that exposes the lens adjustment member. This segmentation allows the adjustment interface to be accessible through the face cover without requiring complex internal mechanisms, simplifying the overall structure while maintaining ease of operation.
Solution Approach 2:
The lens adjustment member acts as an intermediary between the user and the lens barrel. By exposing this adjustment member through the face cover opening, the user can directly interact with the adjustment mechanism without removing the face cover, simplifying the interaction while maintaining 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
Enables convenient adjustment of the diopter within the face cover's usage, reducing the need for separate diopter adjustment structures and maintaining the apparatus's compactness and user convenience.
Implementation Method 1
an elastic member that includes opposite ends fixed to the housing and a central portion thereof coupled to the lens adjustment member, and is configured to provide an elastic force so as to allow the lens adjustment member to move in a first direction or in a second direction opposite to the first direction
Data Source
AI summary
A face cover detachably coupled to a head-mounted display apparatus that includes a lens and a lens barrel configured to surround the lens and adjust positions of the lens is provided. The face cover includes a housing including an opening formed in an area thereof, a lens adjustment member disposed in the opening so that at least a portion thereof is exposed through the opening, and an elastic member that includes opposite ends arranged in the housing and a central portion thereof coupled to the lens adjustment member, and is configured to provide an elastic force so as to allow the lens adjustment member to move in a first direction or in a second direction opposite to the first direction. In case that an external force is applied to the lens adjustment member in the first direction, the lens adjustment member is configured to be moved in the first direction such that the lens adjustment member come into contact with the lens barrel. And in case that the lens adjustment member rotates in a first rotation direction in a state where the lens adjustment member and the lens barrel is in contact with each other, the lens barrel is configured to rotate in a second rotation direction opposite to the first rotation direction such that a diopter of the lens is adjusted.