Eyeglass Frame with Double-Knuckle Hinges for Selectable Lenses
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Solution Overview
Problem
Current eyeglass designs fail to provide a seamless solution for individuals with presbyopia in conjunction with hyperopia, myopia, or astigmatism, often requiring multiple prescriptions and resulting in uncomfortable bifocal usage.
Innovation Solution
The integration of two additional lenses with double-knuckle hinges allows for pivotable selectable lenses that can switch between active and storage configurations, enabling adaptable focal lengths, shade protection, and aesthetic options, effectively combining multiple prescriptions into a single pair of eyeglasses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If bifocal lenses are used to correct presbyopia in conjunction with other visual impairments, then vision correction is achieved, but the user must tilt their head at various angles which is tedious and uncomfortable
Solution Approach 1:
The eyeglass system divides the lens functionality into separate segments: fixed lenses for distance vision and movable secondary lenses for near vision. This segmentation allows each lens type to be optimized for its specific function without requiring the user to tilt their head, as the secondary lenses can be independently positioned to provide the correct optical power for reading.
Solution Approach 2:
The secondary lenses are designed to be movable rather than fixed, allowing dynamic adjustment between different positions. The spring-loaded mechanism enables the secondary lenses to move forward when the user needs near vision and retract when distance vision is required, providing adaptability without compromising comfort.
2Measurement precision
If multiple prescriptions are required for presbyopia combined with hyperopia, myopia, or astigmatism, then accurate vision correction is possible, but the user needs to carry and switch between multiple pairs of glasses
Solution Approach 1:
The invention merges multiple lens prescriptions into a single eyeglass frame by combining fixed lenses (for distance correction) with movable secondary lenses (for near vision addition). This consolidation eliminates the need for users to carry multiple separate pairs of glasses while maintaining the precision of multiple prescriptions.
Solution Approach 2:
The eyeglass system achieves multi-functionality by incorporating both distance correction and near vision capability in one device. The fixed lenses provide base correction for distance vision, while the secondary lenses add accommodative power for near work, making the single pair of glasses universal for both viewing distances.
3Measurement precision
If fixed lenses are used for distance vision, then distance clarity is achieved, but the user cannot easily switch to near vision without tilting the head
Solution Approach 1:
The system maintains fixed lenses for stable distance vision while adding dynamic secondary lenses that can move into position when near vision is needed. The spring mechanism provides the necessary force to move the secondary lenses forward, enabling easy switching between focal lengths without head tilting.
Solution Approach 2:
The secondary lenses act as an intermediary element between the fixed distance lenses and the user's eye. When positioned, they provide the additional optical power needed for near vision, mediating the transition from distance to near focus without requiring the user to change the position of their head or the fixed lenses.
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
This solution allows users to seamlessly switch between different focal lengths and light conditions without the need for multiple prescriptions, providing comfort and versatility, similar to bifocals without the tilting and aesthetic drawbacks.
Implementation Method 1
The first secondary lens is pivotally connected to the frame by a first double-knuckle hinge and the second secondary lens is pivotally connected to the frame by a second double-knuckle hinge
Data Source
AI summary
A construction for eyeglasses provides a frame with a first rim for securing a first fixed lens, a second rim for securing a second fixed lens, a first temple hinge for pivotally joining a first temple arm to the first rim, a second temple hinge for pivotally joining a second temple arm to the second rim, and a pair of double-knuckle hinges for joining pivotally joining a first selectable lens and a second selectable lens to the frame. The double knuckle hinges allow the first selectable lens and the second selectable lens to rotate 270 degrees, switching between a storage configuration and an active configuration. In the active configuration the selectable lenses overlap the fixed lenses in order to provide additional desirable properties. Thus the selectable lenses can be used in combination with the fixed lenses to act as bifocal glasses.