Smart Magic Cube Ball Shaft Sensing Without Brush Wear

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Solution Overview

Problem

Existing smart magic cubes face issues with sensor wear and tear due to metal brushes, complex structure requiring high precision assembly, and high costs due to multiple PCBs and sensors per face, leading to installation difficulties and reduced user enthusiasm.

Innovation Solution

A simplified sensing device using a master and slave circuit board with electronic sensing elements and a ball shaft structure that eliminates the need for PCBs and metal brushes, allowing for non-contact induction and easier assembly, reducing production costs and complexity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If metal brush sensors are used to detect rotation state, then sensing capability is achieved, but sensor wear and tightness problems occur affecting service life

Engineering Contradiction:

Improvesensor service lifeVSAvoidmetal brush wear and contact friction

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent replaces the mechanical metal brush sensor system with a magnetic field-based sensing system. Magnets are embedded in the rotating components, and Hall sensors or other magnetic sensors detect the rotation state through non-contact magnetic field interaction, eliminating mechanical contact and wear entirely.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces magnetic fields as an intermediary between the rotating components and the sensing system. Instead of direct mechanical contact, the magnetic field serves as the mediator that transmits rotational information to the sensors without physical wear.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Measurement precision

If separate PCB and sensors are arranged on each of six faces, then rotation angle detection is accurate, but structure becomes complex and installation difficulty increases

Engineering Contradiction:

Improverotation angle detection accuracyVSAvoidstructure complexity and installation difficulty

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the sensing functions for all six faces into a centralized sensing system rather than distributing separate PCB and sensor assemblies on each face. This consolidation reduces structural complexity while maintaining detection accuracy through strategic magnet and sensor placement.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent creates a universal sensing system that can detect rotation states of multiple faces using a shared set of sensors and processing circuitry. The same sensing mechanism serves multiple detection purposes, reducing the need for face-specific components.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Measurement precision

If high precision assembly is required for adjacent faces to be perpendicular, then sensing accuracy is maintained, but manufacturing cost and installation difficulty increase

Engineering Contradiction:

Improvesensing accuracyVSAvoidassembly difficulty and cost

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent replaces mechanical alignment requirements with magnetic field-based detection that is less sensitive to precise mechanical positioning. The magnetic sensing system can accommodate greater assembly tolerances while maintaining adequate detection accuracy, reducing manufacturing and assembly costs.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Ease of repair

If users disassemble smart magic cube, then maintenance and exploration are enabled, but reassembly precision affects sensing accuracy and rotation feel

Engineering Contradiction:

Improveuser disassembly and maintenanceVSAvoidsensing accuracy after reassembly

Core Design Contradiction:

Ease of repairVSMeasurement precision

Solution Approach 1:

The patent replaces mechanical contact sensors with magnetic sensors that are more tolerant of assembly variations. This allows users to disassemble and reassemble the cube without requiring precision alignment, as the magnetic field detection remains functional across a wider range of positions.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 simplified structure improves assembly efficiency, reduces production costs, enhances durability, and allows users to easily disassemble and reassemble the smart magic cube, increasing user engagement and reducing maintenance challenges.

Implementation Method 1

A sensing device is provided, which comprises a master circuit board and a slave circuit board... Each of electronic sensing elements is in communication connection with the micro control unit... The electronic sensing element senses a position of a positioning module

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Data Source

PatentUS12478863B2Sensing device, ball shaft for smart magic cube, and smart magic cube

Publication Date: 2025.11.25 GUANGZHOU GANYUAN INTELLIGENT TECH CO LTD

AI summary

A sensing device, a ball shaft for smart magic cube, and a smart magic cube are provided. By optimizing the sensing device of the smart magic cube, only two circuit boards are needed to sense rotation states in six directions, thereby changing a current technology that requires setting PCB boards and sensors in each direction of the smart magic cube. The smart magic cube has a simple structure and is easy to assemble, which may reduce production costs.