Magnetic Optical Mouse Wheel for Smooth Scrolling and Accurate Clicks

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Mechanical coded scrolling in mouse wheels is too mechanical, lacking smoothness and affecting hand feel, and pressing the wheel can lead to incorrect activation of buttons.

Innovation Solution

A magnetic damping top-speed optical wheel design featuring a PCBA board with buttons, a bracket, and an optical sensing assembly, utilizing magnetic inner and outer shafts with teeth for smooth scrolling and precise button activation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If mechanical encoders with plastic plane gears and iron wire gratings are used, then the wheel can provide mechanical coded scrolling, but the operation feels too mechanical and lacks smoothness

Engineering Contradiction:

Improvescrolling smoothnessVSAvoidmechanical structure complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces the traditional mechanical encoder system (plastic plane gears and iron wire gratings) with a magnetic field-based optical sensing system. The magnetic inner shaft with magnetic teeth interacts with the optical sensor to detect rotation, eliminating the need for mechanical contact between grating wheels and encoders, thereby achieving smooth scrolling without mechanical friction and wear

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a magnetic field as an intermediary between the rotating shaft and the detection system. The magnetic teeth on the inner shaft create magnetic field changes that are detected by the optical sensor, serving as a non-contact mediator to transmit rotational information without mechanical contact

Inventive Principle:

Principle #24Intermediary (Mediator)

2Duration of action of moving object

If mechanical encoders are used, then the wheel can detect rotation, but mechanical wear reduces the lifespan

Engineering Contradiction:

Improvewheel lifespanVSAvoidmechanical wear

Core Design Contradiction:

Duration of action of moving objectVSObject-generated harmful factors

Solution Approach 1:

The patent eliminates mechanical contact between the encoder components by using a magnetic field-based detection system. The optical sensor detects the rotation of the magnetic inner shaft through magnetic field changes without any physical contact, thereby completely avoiding mechanical wear and extending the wheel's lifespan

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent creates a magnetic field copy of the rotational motion instead of using direct mechanical contact. The magnetic teeth on the inner shaft generate a magnetic field pattern that is detected by the optical sensor, effectively copying the rotational information without physical interaction between moving parts

Inventive Principle:

Principle #26Copying

3Ease of manufacture

If the wheel structure is simplified, then manufacturing is easier, but button activation may become incorrect

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidbutton activation accuracy

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent replaces complex mechanical button activation mechanisms with an integrated PCB board that contains all buttons (middle button, left swing button, right swing button) as electronic components. This integration simplifies the overall structure while ensuring reliable button activation through electronic circuitry rather than mechanical linkages

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 magnetic design provides a smooth scrolling experience with improved hand feel and correct button activation, enabling high-speed operation and reducing mechanical wear.

Implementation Method 1

an optical sensing assembly is arranged inside the bracket and electrically connected with the PCBA board

Methodology Applied

Scientific EffectOptical sensing: Photoelectric Effect

Implementation Method 2

a magnetic inner shaft is arranged inside the bracket by a metal shaft; a uniform array of first magnetic teeth is arranged on a surface of the magnetic inner shaft; a magnetic outer shaft is nested to the surface of the magnetic inner shaft; second magnetic teeth corresponding to the first magnetic teeth are arranged inside the magnetic outer shaft

Methodology Applied

Scientific EffectMagnetic attraction: Magnetism

Data Source

PatentUS12517597B2Magnetic damping top-speed optical wheel

Publication Date: 2026.01.06 SHENZHEN LOYAL ELECTRONICS CO LTD

AI summary

A magnetic damping top-speed optical wheel which includes a PCBA board; a middle button, a right swing button, and a left swing button are arranged on the PCBA board; a bracket is arranged on a surface of the PCBA board; an optical sensing assembly is arranged inside the bracket and electrically connected with the PCBA board. A pressing portion is arranged on the bracket between the left swing button and the right swing button. The pressing portion is parallel to the left swing button and the right swing button, such that vertically pressing the wheel would only trigger the middle button but the left swing button or the right swing button.