Head-Mounted Frame and Headgear for Stable Virtual Image Viewing
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Solution Overview
Problem
Existing head-mounted display devices for reducing myopia caused by long-term close viewing are unstable and uncomfortable to wear, failing to effectively prevent the eyeball from elongating due to prolonged close object focus.
Innovation Solution
A head-mounted fixing device with a rigid frame, adjustable headgear, and optical assemblies that use a concave mirror to create a virtual image, allowing users to view objects from a distance while magnifying them, featuring a combination of side frames, a front frame, and elastic components for secure fitting and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a head-mounted display device is designed with a frame and optical elements, then users can view virtual images combined with environmental images, but the device becomes unstable and uncomfortable to wear
Solution Approach 1:
The head-mounted device is divided into multiple independent components: a head frame with side frame portions and front frame portion, a separate headgear with arc portion and top portion, and optical assemblies. This segmentation allows each component to be optimized independently for its specific function while maintaining overall stability through their connections.
Solution Approach 2:
The headgear's arc portion extends backward to surround and abut against the back of the user's head, creating a counterbalancing structure that prevents the device from falling forward. The top portion connects the front frame to the arc portion, distributing weight and providing structural support to maintain wearing stability.
2Strength
If the head-mounted device uses rigid frame materials for structural support, then the device maintains its shape and optical alignment, but it reduces comfort and adaptability to different head sizes
Solution Approach 1:
The invention merges rigid frame structures with flexible headgear components. The rigid head frame provides structural support and optical alignment, while the flexible headgear with elastic pieces and adjustable straps combines with the rigid frame to adapt to different head sizes and shapes, achieving both strength and versatility.
Solution Approach 2:
The headgear incorporates elastic pieces and adjustable straps that can dynamically adapt to different users' heads. The elastic pieces allow the headgear to stretch and conform to various head shapes, while the adjustable straps enable users to customize the fit, making the rigid frame structure adaptable to different head sizes.
3Adaptability or versatility
If the device uses elastic components and adjustable headgear for comfortable fitting, then adaptability improves, but the device may become less stable and fail to prevent forward falling
Solution Approach 1:
The arc portion of the headgear extends backward to surround and abut against the back of the user's head, creating a counterbalancing structure that prevents the device from falling forward. This backward extension acts as a counterweight that balances the forward force of the optical assemblies and display unit.
Solution Approach 2:
Different parts of the headgear have different properties: the arc portion is designed to be flexible and adaptable to fit different head shapes, while the connection points to the head frame are designed to be stable and secure. The top portion provides localized support to the forehead area, ensuring stability where needed while maintaining overall adaptability.
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 device securely fits on the head, preventing the device from falling and allowing users to view objects clearly from a distance, effectively reducing eye strain and elongation, thereby addressing the issue of myopia caused by prolonged close object focus.
Implementation Method 1
the optical element in this patent, to be placed on the frame and located on the transmission path of the image beam of the display unit. Since the optical element is a concave lens with a multilayer coating, the image beam provided by the display unit can be transmitted to the optical element is reflected into the user's eyes by the multilayer coating on the optical element
Implementation Method 2
the top portion includes an elastic piece, one end of the elastic piece is connected to the front frame portion, and another end of the elastic piece is connected to the arc portion
Data Source
AI summary
A head-mounted fixing device includes: a head frame including two side frame portions, and a front frame portion located between the two side frame portions and connected to the two side frame portions, and the two side frame portions and the front frame portion being made of rigid materials; an elastic piece including one end connected to the front frame portion; a headgear including an arc portion and a top portion, wherein two ends of the arc portion are respectively connected to the two side frame portions, one end of the top portion is connected to another end of the elastic piece, and another end of the top portion is connected to the arc portion; it is characterized in that the front frame portion is used to abut against a user's forehead to provide a fulcrum.