Eyeglasses Charging Case With Auto-Locking Contact Retention

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Solution Overview

Problem

Existing charging systems for electronic eyeglasses require manual alignment and retention at the nosepiece to ensure stable contact for charging, leading to potential disconnection during movement or impact.

Innovation Solution

A case with rocking retention means featuring magnets and pins that automatically engage with the eyeglasses' hinge area upon insertion, ensuring secure charging without manual alignment or nosepiece retention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional charging systems use pins and magnets at one end of the case, then charging contact can be established, but the eyeglasses require manual positioning and retention devices to prevent movement

Engineering Contradiction:
Improvecharging contact stabilityVSAvoidmanual positioning requirement
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The retention means are designed to move from an inactive position to an active position automatically when the eyeglasses are inserted. This dynamic mechanism engages the charging contacts and secures the eyeglasses without requiring manual positioning, resolving the contradiction between reliable charging contact and ease of operation

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system performs self-positioning and self-retention through the automatic engagement of retention means. When the eyeglasses are placed in the case, the retention means automatically move to engage the charging area and lock the eyeglasses in place, eliminating the need for user intervention and ensuring stable charging contact

Inventive Principle:
Principle #25Self-service

2Reliability

If retention devices are added at the nosepiece to prevent movement, then charging stability improves, but device complexity and cost increase

Engineering Contradiction:
Improvecharging stabilityVSAvoidretention devices at nosepiece
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The invention removes the need for retention devices at the nosepiece by extracting the retention function and relocating it to the case structure. The retention means are integrated into the case body, eliminating additional components on the eyeglasses themselves and reducing overall device complexity while maintaining charging stability

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The retention function is merged with the charging mechanism in the case. The same retention means that secure the eyeglasses also establish charging contact, combining two functions into a single integrated system rather than requiring separate retention devices and charging components

Inventive Principle:
Principle #5Merging (Combining)

3Ease of operation

If the eyeglasses are simply placed in the case, then ease of operation improves, but the eyeglasses may move around and lose contact with charging pins

Engineering Contradiction:
Improvesimple placementVSAvoidcharging contact maintenance
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The retention means dynamically respond to the insertion of the eyeglasses by moving from an inactive to an active position. This automatic engagement maintains charging contact reliability while requiring only simple placement by the user, resolving the contradiction between ease of operation and charging contact maintenance

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The system provides mechanical feedback through the engagement of retention means that automatically detect and respond to the presence of the eyeglasses. This feedback mechanism ensures the eyeglasses are properly positioned and secured for charging without requiring user intervention, maintaining both ease of operation and charging reliability

Inventive Principle:
Principle #23Feedback

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 case provides stable and reliable charging by automatically securing the eyeglasses within the case, eliminating the need for manual positioning and reducing the risk of disconnection during use.

Implementation Method 1

in contrast with the action of elastic means, in which said retention means contact a charging area

Methodology Applied
Scientific EffectElastic force: Elasticity

Implementation Method 2

the pins and the magnets come into contact with the part of the eyeglasses used for charging

Methodology Applied
Scientific EffectMagnetic force: Magnetism

Data Source

PatentEP4333668B1Case for electronic devices
Publication Date: 2026.03.18 LUXOTTICA SRL
  • EP4333668B1 patent drawingFigure 1
  • EP4333668B1 patent drawingFigure 2
  • EP4333668B1 patent drawingFigure 3

AI summary

A case (1) for electronic devices, which comprises a case body (2) that is adapted to accommodate an electronic device (3), and is provided with at least one receptacle (2a, 2b) for the electronic device (3); retention means (7) being arranged at the at least one receptacle (2a, 2b) of the electronic device, at least one of the retention means (7) being provided with charging means (10, 11), the retention means (7) being adapted to pass from an inactive position to an active position, in contrast with the action of elastic means (8), in which the retention means (7) contact a charging area of the electronic device and at the same time lock the electronic device inside the case body (2) when the electronic device is stored inside the case body.