Spectacles with Adjustable Plastic Thread Tensioning Sleeve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing spectacles with metal frames and nylon threads face difficulties in reliably fixing and releasing the plastic thread tension, and are not adaptable for lenses of different diameters, leading to complex assembly and inconsistent tension.
Innovation Solution
A sleeve with a single hole is used, allowing the plastic thread's loop to be tightened by displacing the sleeve, enabling adjustable tension and secure lens stabilization without the need for holes in the lenses or frame, and allowing easy thread replacement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a two-hole disk is used to fix the plastic thread loop, then the thread can be guided through the holes, but the loop can only be loosened with difficulty due to jamming of the thread
Solution Approach 1:
A release tool is introduced as an intermediary element to interact with the sleeve's release structure. The release tool engages with the sleeve to push the plastic thread longitudinal sections away from each other, creating space for thread removal without jamming. This mediator resolves the contradiction by enabling easy release while maintaining secure fixation during normal use.
Solution Approach 2:
The sleeve is designed with a dynamic release mechanism that transitions from a locked state (holding threads in position) to an unlocked state (allowing thread removal). The sleeve can be actuated by the release tool to change its internal configuration, enabling the thread to be released. This dynamic behavior resolves the contradiction between secure fixation and easy release.
2Device complexity
If the plastic thread tension is fixed in the known embodiments, then the assembly is simplified, but the tension cannot be freely selected and lenses of different diameters are not freely selectable
Solution Approach 1:
The plastic thread tensioning system is made dynamic through the sleeve mechanism. The sleeve can be displaced along the plastic thread to adjust the loop size and tension. This dynamic adjustment capability allows the same spectacles frame to accommodate lenses of different diameters while maintaining proper thread tension, resolving the contradiction between simplified design and adaptability.
Solution Approach 2:
The sleeve structure serves multiple functions: it guides the plastic thread, maintains loop shape, enables tension adjustment, and facilitates thread release. This multi-functional design allows a single component to handle various lens diameters and tension requirements without requiring multiple specialized components, resolving the contradiction between complexity and versatility.
3Stability of the object's composition
If the plastic thread is wrapped around the lens with fixed tension, then the lens is stabilized, but the thread replacement becomes difficult
Solution Approach 1:
The release tool acts as an intermediary to facilitate thread replacement. By engaging with the sleeve's release structure, the tool enables the user to easily remove the old plastic thread and install a new one without compromising the stabilization function. This resolves the contradiction between maintaining stability and enabling easy repair.
Solution Approach 2:
The sleeve provides a dynamic locking and releasing mechanism for the plastic thread. During normal wear, the sleeve maintains the thread in a locked, stabilizing position. During replacement, the sleeve can be actuated to release the thread, making replacement easy. This dynamic behavior resolves the contradiction between stability and ease of repair.
Data Source
AI summary
Disclosed are spectacles having two lenses, a rigid or flexible frame including a frame part extending on an upper or a lower lens edge of each lens, an arm linked on each end of the frame using a hinge, a plastic thread associated with each lens, each end of the plastic thread is attached to the frame. The attachment point is formed as follows: one end of the plastic thread forms a loop that wraps around a frame part, two longitudinal sections of an end section of the plastic thread, which form the loop and extend parallel to one another, are jointly guided through a longitudinal borehole of a sleeve and are enclosed by the sleeve, the tension of the plastic is freely selectable by displacing the two longitudinal sections relative to one another or by displacing the sleeve on the two longitudinal sections.