Bayonet Mounts for Removable Vision Correction Lenses
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Solution Overview
Problem
Existing electronic devices with fixed lenses lack a convenient and secure method for attaching removable vision correction lenses to correct refractive errors, such as nearsightedness or astigmatism, while ensuring proper optical alignment and cosmetic appearance.
Innovation Solution
The implementation of bayonet mounts with push-and-turn structures, comprising pins and slots, for securely attaching and detaching removable vision correction lenses to fixed lenses, providing axial preloading and rotational alignment to maintain optical performance and cosmetic requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If removable vision correction lenses are attached to fixed lenses, then vision correction capability is improved, but alignment precision and optical performance may deteriorate
Solution Approach 1:
A bayonet mount mechanism serves as an intermediary between the removable vision correction lens and the fixed lens assembly. This mount includes a mounting structure with a first portion on the removable lens and a second portion on the fixed lens assembly, featuring complementary geometric shapes (e.g., square or rectangular profiles) that enforce precise rotational and axial alignment when engaged, thereby maintaining optical performance while enabling vision correction adaptability
Solution Approach 2:
The bayonet mount is pre-configured with specific geometric engagement features (such as keyed profiles or cam-locked structures) that automatically align the removable lens with the fixed lens assembly upon attachment. This preliminary configuration of alignment features ensures that proper optical alignment is achieved without requiring additional adjustment steps, resolving the contradiction between ease of removal and alignment precision
2Reliability
If secure attachment method is implemented, then reliability of lens attachment is improved, but device complexity increases
Solution Approach 1:
The bayonet mount employs a dynamic push-and-turn engagement mechanism where the lens is first pushed axially to engage the mounting surfaces, then rotated to lock into place. This dynamic two-stage engagement provides secure attachment through mechanical interlocking (improving reliability) while maintaining a relatively simple overall structure that avoids complex fastening systems (managing device complexity)
Solution Approach 2:
The mounting structure is segmented into distinct functional portions: a first portion on the removable lens and a second portion on the fixed lens assembly. This segmentation allows each portion to be optimized independently for its specific function (engagement, alignment, locking) while maintaining overall structural simplicity, resolving the contradiction between attachment reliability and device complexity
3Ease of operation
If rapid lens swapping is enabled, then ease of operation is improved, but manufacturing precision may deteriorate
Solution Approach 1:
The bayonet mount incorporates pre-configured geometric alignment features (such as keyed profiles or cam-locked structures) that automatically position the removable lens in the correct orientation relative to the fixed lens assembly during the attachment process. This preliminary alignment configuration ensures that rapid lens swapping does not compromise manufacturing precision, as the alignment is built into the mounting mechanism itself rather than requiring manual adjustment
Data Source
AI summary
A system such as a head-mounted device may have left and right displays for displaying images. The images may be presented to left and right eye boxes through left and right fixed (non-removable) lenses and corresponding left and right removable vision correction lenses. The left and right fixed lenses may be supported by left and right fixed lens supports to which the left and right displays are mounted, respectively. To removably attach the vision correction lenses to the fixed lenses, the fixed lens supports and vision correction lenses may be provided with bayonet mounts. The bayonet mounts may have push-and-turn structures such as pins that mate with corresponding slots.