Resilient Spectacle Hinge With Positioning Guide
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Solution Overview
Problem
Existing resilient hinges for spectacles with flat frames lack effective control over the movement of resilient members and studs, leading to inadequate resistance in the over-open position and instability in the hinge's operational range.
Innovation Solution
A resilient hinge design featuring a slot with a flat pin to secure the resilient member, a stud with protrusions to fit the slot, and a stopper that restricts further opening, combined with a positioning guide to control the movement of the resilient member and stud, ensuring stable operation and defined resistance points.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a resilient hinge uses a simple slot and stud structure without positioning guidance, then the device complexity is reduced, but the stability and control of movement becomes inadequate
Solution Approach 1:
The positioning guide acts as an intermediary element between the slot and the stud, providing controlled guidance for the stud's movement within the slot. This mediator ensures stable and predictable movement while maintaining relative simplicity in the overall hinge structure.
2Ease of operation
If the resilient hinge allows free movement of the stud in the slot, then the ease of operation is improved, but the resistance control in the over-open position becomes inadequate
Solution Approach 1:
The positioning guide provides localized control at specific points within the slot, creating defined resistance characteristics in the over-open position while allowing smooth movement in other positions. This local quality approach enables differentiated movement characteristics along the stud's path.
3Manufacturing precision
If the resilient hinge lacks a positioning guide, then the manufacturing precision requirements are reduced, but the operational reliability deteriorates
Solution Approach 1:
The positioning guide serves as a mediator that compensates for variations in manufacturing precision by providing a defined path for the stud. This ensures reliable operation even when there are minor variations in the slot or stud dimensions.
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 design provides stable and controlled movement of the resilient hinge, maintaining the over-open position and preventing excessive stretch, while ensuring smooth operation and maintaining the structural integrity of the spectacle frame.
Implementation Method 1
a resilient member (spring) (8), both members rotationally coupled to one another by linking means (7, 5)
Data Source
Figure 1~2B
Figure 3~4
Figure 5A~5C
AI summary
The present invention relates to resilient hinges for pair of spectacles having a flat frame. The resilient hinge comprises two flat members, one being an integral part of the frame, the other being an integral part of the spectacle arm, wherein one of the flat members comprises a slot to accommodate a stud and a resilient member and the other member comprises a stopper, both members coupled to one another by a linking pin. In a preferred embodiment, the slot comprising member is an integral part of the spectacle arm and the stopper comprising member is an integral part of the frame. In a particular embodiment the resilient hinge further comprises a positioning guide to control the movement of the resilient member and stud in the slot with respect to the other member.