Rimless Spectacle Frame Carrier Element for Tool-Free Lens Protection

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Solution Overview

Problem

Existing spectacle frame systems for rimless glasses are prone to lens damage during frequent frame changes, and existing solutions either require tools for assembly or result in loose connections, posing risks to the lenses and temples.

Innovation Solution

A stable connection system using a metal carrier element with threaded pins and positioning pins, integrated into the spectacle lens and cheek piece, ensuring a backlash-free coupling and easy frame changes without tools, utilizing a T-shaped cross-section metal part with recesses and locking points for secure attachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If screw connections are used to attach cheekpieces to rimless glasses, then the cheekpieces can be exchanged, but the spectacle lens is prone to damage during handling

Engineering Contradiction:

Improveexchangeability of cheekpiecesVSAvoidlens damage risk

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The invention divides the attachment system into separate components: a carrier element that remains permanently attached to the lens, and interchangeable cheekpiece portions that attach to the carrier. This segmentation allows the lens to remain undisturbed while enabling cheekpiece exchangeability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The carrier element serves as an intermediary component between the lens and the interchangeable cheekpiece portions. It provides a stable mounting interface on the lens while offering standardized attachment points for various cheekpieces, thus protecting the lens from direct handling during exchanges.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If plug-in elements with latching elements are used, then connections are secured against loosening, but assembly and release require tools or considerable effort

Engineering Contradiction:

Improveconnection stabilityVSAvoidassembly effort

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The invention employs resilient latching elements that can dynamically deform during assembly and release. The latching elements are designed to flex during insertion and release with simple pushing movements, then lock securely in the engaged position, providing both ease of operation and connection stability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The latching mechanism utilizes elastic deformation as a key parameter change. The resilient latching elements temporarily change their physical state during assembly and release, allowing tool-free operation while maintaining secure locked positions during use.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If conventional screw connections in two perpendicular planes are used, then replacement is achieved, but the risk of lens and temple damage increases

Engineering Contradiction:

Improveframe replaceabilityVSAvoidlens and temple damage risk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The invention extracts the complex multi-plane screw connection system and replaces it with a simplified single-plane attachment mechanism. The carrier element provides a stable base on the lens, while the cheekpiece portions attach through a single straightforward connection process, eliminating the need for complex multi-directional fastening that risks lens and temple damage.

Inventive Principle:

Principle #2Taking out (Extraction)

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 solution provides a high-strength, tool-free, and secure attachment method for rimless glasses, protecting the lenses and allowing easy frame changes, enhancing both quality and design by ensuring the carrier element is completely covered during frame swaps, thus preventing damage and ensuring a stable mount.

Implementation Method 1

Both shafts are connected with their free end in mounting block. The two shafts have latching elements that are elastically yielding and are connected in a latching manner in sockets of the fastening block

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

the spectacle lens has a spaced-apart from the lens edge, continuous bore for receiving the threaded pin

Methodology Applied

Scientific EffectScrew thread mechanism: Screw

Data Source

PatentEP1877853B1Device for changing bridges, side arms and browbars of rimless spectacles, and for changing bridges and side arms of metallic and plastic spectacle frames

Publication Date: 2010.07.28 WIED GUNTHER

Figure 1~3
Figure 4~9
Figure 5~5a

AI summary

In exchangeable spectacle frames, in which the side arms and bridge are fastened to the lenses or central part of the spectacle frame by a support element, the support element is a rod-shaped, rail-shaped or plate-shaped metal part with a metallic threaded pin and an additional metallic positioning pin or threaded pin. The metallic or plastic end of the side arm on the side of the lens, or the connecting element between the support element and metallic or plastic side arm, is shaped with recesses which are adapted to the form of the support element, have the same length as the metallic part and engage the metallic part. The recesses in the side arm form at least two catches on the lateral, inner plastic interfaces which interact with the threaded pin and positioning pin. Alternatively, the side arms or bridges are made of an elastic material with a slit-shaped recess, in which recesses are located for form-fittingly receiving the pins of the support element and locking them after their insertion.