Electromagnetic Button Structure for Precise Force Feedback
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Solution Overview
Problem
Conventional electronic device buttons provide poor feedback to users, making it difficult to confirm operations, resulting in low accuracy and poor user experience.
Innovation Solution
A button design incorporating a motor with a magnetic circuit, voice coil, and iron core that provides force feedback through movement of a magnetic conductive cover plate, enhanced by elastic members and a sensor for improved accuracy and user interaction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional button is used, then the device structure remains simple, but the user feedback effect is poor and operation accuracy is low
Solution Approach 1:
The patent replaces the conventional mechanical button structure with an electromagnetic driving system consisting of a voice coil, magnetic circuit, and movable cover plate. This substitution transforms the purely mechanical operation into an electromechanical system that provides active force feedback, thereby improving operation accuracy while managing structural complexity through functional integration.
Solution Approach 2:
The patent implements a feedback mechanism where the electromagnetic driver actively generates force feedback to the user upon button operation. The voice coil and magnetic circuit work together to create measurable force responses, allowing users to confirm their operations through tactile feedback, thus resolving the poor feedback issue of conventional buttons.
2Ease of operation
If an electromagnetic driving system is added to provide force feedback, then user feedback effect is improved, but the device complexity increases
Solution Approach 1:
The patent merges multiple functions into the button assembly: the movable cover plate serves as both the button interface and the moving component of the electromagnetic driver; the magnetic circuit integrates with the button housing; and the voice coil is positioned within the button structure. This merging reduces the need for separate feedback mechanisms, managing complexity while providing force feedback.
Solution Approach 2:
The button assembly is designed to perform multiple functions: it serves as the user interface for operation, the housing for the electromagnetic driver, the structure for force feedback generation, and the mounting platform for the sensor. This multi-functionality eliminates the need for separate components, thereby improving ease of operation without proportionally increasing complexity.
3Force
If the magnetic circuit components are arranged with gaps, then the button provides force feedback, but the button size increases
Solution Approach 1:
The patent utilizes the thickness dimension of the button to arrange the magnetic circuit components. The voice coil, magnetic conductive cover plate, and iron core are stacked in the thickness direction with controlled gaps, allowing force feedback generation while minimizing the increase in overall button volume. This dimensional arrangement optimizes the balance between force feedback capability and compact size.
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 button design enhances user experience by providing clear confirmation of button operations, improving accuracy and facilitating precise interactions through force feedback, while also enabling miniaturization and stability.
Implementation Method 1
The voice coil and the iron core are configured to drive the magnetic conductive cover plate to drive the shell to move in the thickness direction of the motor
Implementation Method 2
the elastic member is located between the magnetic conductive cover plate and the base, one end of the elastic member is connected to the magnetic conductive cover plate, and the other end of the elastic member is connected to the base
Data Source
AI summary
A button and electronic device, including shell and motor connected to the shell, the motor includes base and magnetic circuit, accommodating space is formed in the base, at least part of the magnetic circuit is accommodated in the accommodating space. The magnetic circuit at least includes magnetic conductive cover plate, voice coil and iron core, the magnetic conductive cover plate is fixedly connected to the shell and movably connected to the base. The voice coil and the iron core are accommodated in the accommodating space and are fixedly connected to the base, the voice coil is sleeved on the iron core, preset gap is formed between the iron core and the magnetic conductive cover plate. The voice coil and the iron core drive the magnetic conductive cover plate to drive the shell to move. The button can achieve feedback function to the user, thereby improving accuracy of user operation.