Wearable Rod Assembly for Tool-Free Battery Replacement

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Solution Overview

Problem

Existing smart eyewear requires cumbersome battery replacement processes due to the use of closure doors fixed with screws or adhesives, necessitating tools for extraction.

Innovation Solution

A rotatable rod system with integrated housing seats and extraction aids, allowing easy insertion and removal of electronic components like batteries without tools, using magnetic contacts for stabilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If closure doors are fixed with screws or adhesives to retain the battery, then the battery is securely retained and protected, but the battery replacement process becomes cumbersome and requires tools

Engineering Contradiction:
Improvebattery retention securityVSAvoidbattery replacement ease
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The rod is divided into two separable portions: a first portion with a first housing seat and a second portion with a second housing seat. The second portion can be extracted from the first portion to provide access to the battery, and then reinserted to close the access. This segmentation allows the battery to be securely retained when the rod is closed while enabling tool-free access for replacement by simply separating the portions.

Inventive Principle:
Principle #1Segmentation

2Object-affected harmful factors

If closure doors are used to protect the battery from impacts and external agents, then the battery is protected, but the replacement process requires solvents or thermal energy to remove the doors

Engineering Contradiction:
Improvebattery protection from external agentsVSAvoidbattery replacement complexity
Core Design Contradiction:
Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The rod portions are designed with dynamic separability rather than permanent fixation. The second portion can be easily extracted from and reinserted into the first portion without requiring solvents or thermal energy. This dynamic design maintains battery protection when closed while dramatically simplifying the replacement process to merely separating and rejoining the rod portions.

Inventive Principle:
Principle #15Dynamics

3Strength

If the rod structure is made robust to protect electronic components, then the components are protected from impacts, but the extraction and insertion of components becomes more difficult

Engineering Contradiction:
Improverod structural strengthVSAvoidcomponent extraction ease
Core Design Contradiction:
StrengthVSEase of operation

Solution Approach 1:

The rod is segmented into two portions that can be separated to access the battery. This segmentation allows the overall rod structure to maintain robustness for protection while the separation interface enables easy component extraction and insertion without compromising structural integrity when closed.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentUS20260016704A1Rod for a device and wearable device comprising such rod
Publication Date: 2026.01.15 LUXOTTICA SRL
  • US20260016704A1 patent drawing
  • US20260016704A1 patent drawing
  • US20260016704A1 patent drawing

AI summary

A rod for a device includes: a first portion associable with a device, the first portion including a first housing seat; a second portion rotatably coupled to the first portion, the second portion being insertable into/extractable from the first housing seat, the second portion including a second housing seat facing a first bottom wall of the first housing seat when the second portion is inserted into the first housing seat, the second housing seat being accessible when the second portion is extracted from the first housing seat; at least one electronic component adapted to be inserted into/extracted from the second housing seat; and a first extraction aid element configured to extract the second portion from the first housing seat.