Binocular Head-Mounted Device with Independent Interpupillary Adjustment
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Solution Overview
Problem
Existing binocular head-mounted devices with interpupillary distance adjustment mechanisms are unsuitable for users with asymmetrical eyes, as they adjust both lens pieces simultaneously, and have a bulky central rotary structure, making them cumbersome and difficult to use for individual eye adjustments.
Innovation Solution
A binocular head-mounted device with interpupillary distance adjustment mechanisms that utilizes snap-fit portions and positioning structures to allow independent horizontal movement of display modules corresponding to each eye, simplifying the structure and enabling easy adjustment without additional mechanisms, allowing for asymmetrical eye alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a central rotary structure with gear and racks is used to adjust interpupillary distance, then the distance between lens pieces can be adjusted, but the structure becomes bulky and complex
Solution Approach 1:
The patent divides the single central rotary structure into two independent adjustment mechanisms, one for each lens piece. Each lens piece has its own adjusting mechanism with a screw rod and nut, allowing independent adjustment of left and right lens positions without requiring a bulky central rotary structure.
Solution Approach 2:
The patent extracts the adjustment function from the central rotary structure and distributes it to individual lens pieces. By removing the complex central gear and rack system, the design eliminates the bulky rotary structure while retaining the ability to adjust interpupillary distance through simpler, distributed mechanisms.
2Adaptability or versatility
If a single rotary structure adjusts both lens pieces simultaneously, then interpupillary distance can be modified, but users with asymmetrical eyes cannot adjust each eye independently
Solution Approach 1:
The patent segments the adjustment control into two independent systems, one for the left lens piece and one for the right lens piece. Each system includes its own screw rod and nut mechanism, enabling users to adjust each eye's lens position independently to accommodate asymmetrical eye dimensions.
3Ease of operation
If additional releasing mechanisms are added to enable independent adjustment, then asymmetrical eye alignment becomes possible, but the device structure becomes more complex
Solution Approach 1:
The patent merges the adjustment function with the mounting structure itself. The screw rod and nut mechanism is integrated into the display module mounting system, allowing independent adjustment of each display module without requiring separate releasing mechanisms. The adjustment mechanism and mounting structure work as a unified system.
Data Source
AI summary
A binocular head-mounted device with interpupillary distance adjustment mechanisms is provided in the present invention, which comprises a visual frame, two display modules and two interpupillary distance adjustment mechanisms. The two display modules are disposed at a left side and a right side of the visual frame respectively. Each of the two interpupillary distance adjustment mechanisms is disposed on one of the display modules and on the visual frame and has a snap-fit portion and a positioning structure corresponding thereto. The positioning structure has a plurality of positioning recesses arranged horizontally in a first direction, and the plurality of positioning recesses can be snap-fitted with the snap-fit portion so that the display module is moved parallel to the first direction and then positioned.