Ball Shaft Sensing for Smart Magic Cubes with Two-PCB Hall Detection

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Solution Overview

Problem

Existing smart magic cubes face issues with complex structures, high production costs, and difficulty in assembly due to the use of metal brush sensors and multiple PCB boards, leading to sensor wear, installation precision requirements, and increased maintenance complexity.

Innovation Solution

A simplified sensing device for smart magic cubes using a master and slave circuit board configuration with electronic sensing elements and a ball shaft housing, eliminating the need for PCB boards on each face and incorporating a wireless communication module, allowing for non-contact induction and easy assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If metal brush sensors are used to detect rotation state, then sensing capability is improved, but sensor wear and service life are worsened

Engineering Contradiction:

Improverotation state detection accuracyVSAvoidsensor service life

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent replaces metal brush sensors with Hall effect sensors that detect rotation through magnetic field changes. This substitution eliminates mechanical contact between sensing components, thereby preventing wear while maintaining rotation detection capability. The Hall sensor detects the position and rotation of magnetic components without physical contact, resolving the contradiction between measurement precision and reliability.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If separate PCB boards are arranged on each of six faces, then sensing coverage is improved, but structure complexity and manufacturing difficulty are worsened

Engineering Contradiction:

Improverotation angle detection coverageVSAvoidPCB arrangement complexity

Core Design Contradiction:

Measurement precisionVSDevice complexity

Solution Approach 1:

The patent merges the sensing functions of six separate PCB boards into a single integrated base plate structure. The base plate contains all necessary sensing components and circuitry to detect rotation states of all six faces centrally, eliminating the need for individual PCB boards on each face. This reduces structural complexity while maintaining comprehensive rotation detection capability through centralized sensing architecture.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The base plate is designed as a universal sensing platform that performs multiple functions: detecting rotation states of all six faces, providing structural support, and integrating magnetic components. This multi-functional design eliminates the need for separate specialized PCB boards for each face, reducing overall device complexity while maintaining full sensing coverage.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Measurement precision

If high precision perpendicular arrangement is required for adjacent faces, then sensing accuracy is improved, but installation difficulty and cost are worsened

Engineering Contradiction:

Improvesensing accuracyVSAvoidinstallation difficulty

Core Design Contradiction:

Measurement precisionVSEase of manufacture

Solution Approach 1:

The patent replaces mechanical alignment requirements with magnetic field-based sensing that is insensitive to precise angular positioning. The Hall effect sensors detect rotation through changes in magnetic field orientation rather than requiring mechanically precise perpendicular arrangements. This substitution maintains sensing accuracy while dramatically easing manufacturing and assembly requirements.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

4Ease of repair

If users can disassemble the smart magic cube, then maintenance ease is improved, but sensing accuracy may deteriorate due to reassembly precision requirements

Engineering Contradiction:

Improveuser maintenance capabilityVSAvoidsensing accuracy after reassembly

Core Design Contradiction:

Ease of repairVSMeasurement precision

Solution Approach 1:

The patent replaces mechanical alignment systems with magnetic field-based sensing that tolerates position variations. The Hall effect sensors and magnetic components maintain accurate rotation detection even when assembled by users without specialized tools or precision requirements. This substitution enables user-friendly disassembly and reassembly while preserving sensing accuracy.

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 reduces assembly complexity, lowers production costs, enhances durability, and improves user-friendliness by enabling easy disassembly and reassembly without precise angle adjustments, thus increasing user engagement and market competitiveness.

Implementation Method 1

incorporating a wireless communication module, allowing for non-contact induction

Methodology Applied

Scientific EffectNon-contact induction: Electromagnetic Induction

Data Source

PatentEP4414042B1Sensing device, ball shaft for smart magic cube, and smart magic cube

Publication Date: 2025.11.05 GUANGZHOU GANYUAN INTELLIGENT TECH CO LTD

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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.