Handheld Fan Trackball Control for Stepless Airflow Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional handheld fans lack intuitive and convenient airflow rate adjustment, resulting in suboptimal user experience.
Innovation Solution
An omnidirectionally adjustable handheld fan with a trackball, detection device, and control mainboard that allows for precise airflow rate control through the rotation of the trackball, utilizing an image sensor and light guide component to determine and adjust motor input voltage based on the trackball's direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional buttons or knobs are used for airflow rate adjustment, then the device structure remains simple, but the operational intuitiveness and adjustment convenience are limited
Solution Approach 1:
The patent replaces conventional mechanical buttons or knobs with a trackball operation system. The trackball detects rotation direction through optical or magnetic sensors, converting mechanical rotation into electronic signals that control motor speed. This substitution provides more intuitive omnidirectional adjustment while maintaining reasonable device complexity through integrated sensor modules.
Solution Approach 2:
The patent introduces a detection device as an intermediary between the user's trackball operation and the motor control system. This detection device translates trackball rotation into actionable control signals, enabling precise airflow rate adjustment without requiring direct mechanical connection between control elements and motor, thus improving operational convenience while managing system complexity.
2Measurement precision
If conventional button adjustment is used, then the device structure is simple, but the adjustment precision and response speed are insufficient
Solution Approach 1:
The patent replaces imprecise mechanical button adjustment with an optical or magnetic detection system that reads trackball rotation. This system provides higher measurement precision by detecting rotational direction and magnitude through non-contact sensing, enabling finer airflow rate control without requiring complex mechanical gearing or multiple discrete control elements.
Solution Approach 2:
The detection device provides feedback on trackball rotation direction to the control mainboard, which adjusts motor speed accordingly. This closed-loop feedback mechanism enables precise airflow rate adjustment by continuously monitoring user input and making real-time motor speed corrections, achieving high measurement precision through electronic feedback rather than complex mechanical linkages.
3Ease of operation
If buttons or knobs are used for control, then manufacturing is simple, but operational intuitiveness is lacking
Solution Approach 1:
The patent replaces conventional mechanical control interfaces with a trackball system that detects rotation direction through optical or magnetic fields. This provides superior operational intuitiveness by allowing natural rolling motions in multiple directions, while manufacturing complexity is managed through standardized sensor modules and integrated circuits that can be mass-produced using conventional electronics manufacturing processes.
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
Enables faster, more precise, and intuitive airflow rate adjustments, enhancing operational convenience and user experience by eliminating contact wear and response lag, and providing stepless speed control.
Implementation Method 1
the image sensor is configured to emit light toward the trackball, and receive light reflected from the trackball in response to rotation of the trackball
Implementation Method 2
the light guide component is configured to guide and concentrate the light emitted from the image sensor to form a light pattern onto the trackball, and guide and concentrate the reflected light from the trackball to the image sensor
Implementation Method 3
the air outlet assembly includes a motor, a rotating shaft connected to the motor, and a fan blade connected to the rotating shaft; the control mainboard is configured to adjust a rotational speed of the motor and the fan blade
Data Source
AI summary
An omnidirectionally adjustable handheld fan includes a fan main body having an air outlet assembly, a handle connected to the fan main body, a detection device, and a control mainboard. The handle includes a trackball. The detection device is electrically connected to the control mainboard, the detection device is configured to detect a rotation direction of the trackball, and the control mainboard is configured to adjust a airflow rate of the air outlet assembly based on the rotation direction of the trackball.