Eyeglass Frame Flexible Pivot Hinge 180° Rotation
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Solution Overview
Problem
Conventional eyeglass frames lack sufficient adjustability and comfort due to uniform dimensions and limited flexibility, often causing pressure on the face, and existing flexible hinges are prone to breakage under incorrect force application.
Innovation Solution
An eyeglass frame with a specialized two-segment hinge structure that allows temples to turn approximately 180°, incorporating a pin seat, tenon, and elastic member for increased flexibility and comfort, while maintaining a simple assembly and reduced volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a rigid frame with conventional hinge is used, then the structure is simple and durable, but the temples cannot be adjusted and create excessive pressure on the face
Solution Approach 1:
The hinge is divided into two independent segments: a frame joint with pin seat and tenon, and a temple joint with stem and U-shaped fork. This segmentation allows each part to perform its specific function while maintaining overall simplicity, enabling the temples to pivot 180° for improved adaptability without excessive complexity
Solution Approach 2:
The hinge design transforms the static rigid connection into a dynamic pivot joint that allows the temples to rotate approximately 180°. The pin passing through the pin seat and temple joint creates a rotational degree of freedom, enabling the structure to adapt to different face shapes and wear conditions
2Adaptability or versatility
If resilient materials are employed to provide flexible temple, then the comfort is improved, but the manufacture cost increases
Solution Approach 1:
Instead of using expensive resilient materials throughout the temple, the patent segments the flexibility function into a specific hinge mechanism. The frame joint and temple joint with pin connection provide the necessary flexibility only where needed, while the rest of the temple can use simpler, more cost-effective materials
Solution Approach 2:
The pin acts as an intermediary element between the frame joint and temple joint, enabling relative rotation and flexibility. This simple pin connection achieves the flexibility effect without requiring expensive resilient materials, thereby reducing manufacture cost while maintaining comfort
3Adaptability or versatility
If a spring joint is used to provide flexibility, then the comfort is improved, but the pivotal angle is limited and the joint is prone to breakage
Solution Approach 1:
The hinge is segmented into a frame joint with pin seat and tenon, and a temple joint with stem and U-shaped fork connected by a pin. This segmentation creates a robust pivot connection that allows full 180° rotation without the limitations of spring joints, improving both flexibility and reliability
Solution Approach 2:
Instead of using a spring mechanism that relies on elastic deformation, the patent inverts the approach by using a rigid pin connection that allows free rotation. The flexibility is achieved through the rotational degree of freedom rather than material elasticity, eliminating the risk of spring breakage while maintaining durability
4Adaptability or versatility
If a two-segment hinge with pin seat and tenon is used, then the pivotal angle is increased to 180°, but the assembly complexity increases
Solution Approach 1:
The pin seat, tenon, and pin connection are merged into an integrated hinge assembly where the frame joint and temple joint work together as a unified pivot mechanism. This merging reduces the number of separate components and simplifies assembly while maintaining the 180° pivotal capability
Solution Approach 2:
The pin connection serves multiple functions simultaneously: it acts as a pivot axis for rotation, a connector between frame and temple joints, and a constraint that maintains proper alignment. This multi-functionality reduces the need for additional components, simplifying the overall structure while achieving the desired pivotal angle
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 flexible pivot hinge provides enhanced comfort and reduced stress by allowing adjustable temples to pivot 180°, improving fit and durability through a simpler design with fewer components.
Implementation Method 1
an elastic member is retained within the stem. The stem is inserted into the stem receiving hole and a screw passes through the temple and the stem screw hole to fasten the stem onto the temple
Data Source
AI summary
An eyeglass frame having flexible pivot hinge enabling approximately 180° bending. The frame includes a frame, a temple and a hinge. The frame has a tenon receiving hole and a frame screw hole perpendicular thereto. The temple has a stem receiving hole and a temple screw hole perpendicular thereto. The hinge has a frame joint and a temple joint. The frame joint has a pin seat formed with a bore and a tenon formed with a tenon screw hole. The temple joint has a stem formed with a stem screw hole and ending with substantially U-shaped fork. A channel passes through the two branches of the fork. The instant disclosure includes relatively minimum members for easier maintenance and increased comfortableness.