Head-Mounted Fixing Device with Adjustable Headband
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Solution Overview
Problem
Existing head-mounted fixing devices suffer from unstable fixation, which leads to discomfort and reduced effectiveness in maintaining visual recognition during extended visual tasks, potentially causing eye fatigue.
Innovation Solution
A head-mounted fixing device with a head frame, bracket, and headband that securely abuts against the user's head, featuring adjustable components and a combination of magnifying and reflective assemblies to project virtual images, ensuring stable wear and reduced eye strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a head-mounted fixing device is designed with simple structure, then ease of manufacture is improved, but stability of fixation deteriorates
Solution Approach 1:
The fixing device is divided into multiple functional segments: a head frame with front and side frame portions, a separate bracket, and an adjustable headband. Each segment performs a specific function (support, positioning, securing) and can be manufactured independently, then assembled together to achieve stable fixation without requiring complex integrated manufacturing
Solution Approach 2:
The headband incorporates adjustable components (first adjusting members) that allow dynamic adaptation to different user head sizes and shapes. This adjustability enables the device to achieve stable fixation for various users while maintaining a relatively simple overall structure that can be manufactured using standard processes
2Object-affected harmful factors
If the visual distance is extended, then eye health is improved, but visual recognition ability deteriorates
Solution Approach 1:
A magnifying assembly with a magnifier (convex lens) is introduced as an optical intermediary between the object and the user's eyes. This magnifier creates a magnified virtual image of the object, allowing the user to view details at a closer apparent distance while physically maintaining a longer visual distance, thus preserving both eye health and visual recognition ability
Solution Approach 2:
The reflective assembly uses a mirror to redirect light paths, creating a virtual image space that adds a dimensional element to the optical system. This allows the user to view magnified images at an extended physical distance by utilizing the virtual image dimension created through reflection
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 provides stable wear and reduces eye fatigue by securely fitting on the head and projecting magnified images, improving visual recognition and comfort during extended visual tasks.
Implementation Method 1
a magnifying assembly connected to the extension frame and including a magnifier facing the user
Implementation Method 2
a reflective assembly connected to the extension frame, located between the magnifying assembly and the user, and including a reflector, wherein a back of the reflector faces the user and is configured to reflect object-side light from an object side to the magnifier
Data Source
AI summary
A head-mounted fixing device includes a head frame, a bracket and a headband. Two side frame portions of the head frame abut against two sides of a user’s head, and a front frame portion of the head frame is located between the two side frame portions and abuts against the user’s forehead. The headband is movably connected to two first adjusting members of the head frame, so the position of the front frame portion on the forehead can be adjusted by adjusting positions of the two first adjusting members on the headband. The bracket abuts against the top of the head. The headband can wrap around and abut against the back of the head. The head frame, the bracket and the headband abut against the head to restrict the head-mounted fixing device from moving relative to the head, so that the head-mounted fixing device may be worn without shaking.