Wireless Vibration Motor via Electromagnetic Induction
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Solution Overview
Problem
Conventional vibration motors in mobile communication devices have complex and space-consuming wiring structures for electrical connections, which are inconvenient and unreliable, failing to meet the requirements of high performance and long service life.
Innovation Solution
A vibration motor design featuring a housing with a secondary coil and a primary coil outside the housing, where the primary coil generates an alternating magnetic field to induce a Lorentz force in the secondary coil, eliminating the need for conducting wires and simplifying the structure, thereby avoiding reliability issues associated with cabling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conducting wires are used for electrical connection between vibration motor and circuit board, then electrical connection is achieved, but structure becomes complex and space is occupied
Solution Approach 1:
The patent replaces the mechanical wiring system with an electromagnetic field-based power transmission system. The stator coil generates a magnetic field that directly induces current in the vibrator, eliminating the need for physical conducting wires between the vibration motor and circuit board. This substitution resolves the contradiction by maintaining electrical connection functionality while removing the complex wiring structure.
Solution Approach 2:
The patent extracts and removes the conducting wires from the vibration motor structure. By designing the vibration motor to generate its own driving current through electromagnetic induction, the patent eliminates the external wiring components that cause structural complexity and space occupation, while maintaining reliable electrical connection through the electromagnetic field.
2Reliability
If conducting wires are used for electrical connection, then electrical connection is achieved, but wiring occupies relatively large space
Solution Approach 1:
The patent replaces the space-consuming mechanical wiring system with a compact electromagnetic field-based power transmission system. The magnetic field generated by the stator coil penetrates directly to the vibrator, transmitting power without requiring physical wires that occupy space within the vibration motor housing.
Solution Approach 2:
The patent merges the power generation and power transmission functions within the vibration motor itself. The stator coil and vibrator are positioned to create a direct magnetic coupling, allowing the vibration motor to generate its own driving current internally without external wiring, thereby eliminating the space required for conducting wires.
3Reliability
If conventional wiring structure is used, then electrical connection is achieved, but installation and maintenance become inconvenient
Solution Approach 1:
The patent replaces the complex mechanical wiring system with a simplified electromagnetic field-based system. The stator coil and vibrator are designed to work together as an integrated electromagnetic unit, eliminating the need for separate wiring connections that require careful installation and maintenance. This substitution significantly improves ease of operation while maintaining electrical connection reliability.
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
This design simplifies the product structure, saves space, and enhances reliability by eliminating the need for internal wiring, while maintaining high performance and extending the service life of the vibration motor.
Implementation Method 1
the primary coil generates an alternating magnetic field to induce a Lorentz force in the secondary coil
Implementation Method 2
the primary coil generates an alternating magnetic field to induce a Lorentz force in the secondary coil
Data Source
AI summary
The present disclosure provides a vibration motor and a mobile communication device using same. The vibration motor includes an housing, a vibrator accommodated in the housing, a driving apparatus driving the vibrator to vibrate, and an elastic part elastically supporting the vibrator, where the driving apparatus is a secondary coil accommodated in the housing, the vibrator is provided with a magnet steel corresponding to the coil, the vibration motor further includes a primary coil, disposed outside the housing, corresponding to the secondary coil, and spaced apart from the secondary coil, and the primary coil is electrically connected to the outside to generate an alternating electromagnetic field, to cause the secondary coil to generate an induced electromotive force, and cause relative vibration between the vibrator and the secondary coil.