Vibration Motor Wireless Coil Power Transfer
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Solution Overview
Problem
Existing vibration motors face challenges with complex and space-consuming electrical connections, which hinder their performance and reliability due to cabling issues.
Innovation Solution
A vibration motor design featuring a primary coil connected to the outside to generate an alternating electromagnetic field, inducing vibration in a secondary coil, eliminating the need for internal cables and simplifying the structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If welding a conductive wire to a circuit board is used for electrical connection, then electrical connection is achieved, but the structure becomes complex and occupies large space
Solution Approach 1:
The patent extracts and removes the complex cabling system (conductive wires and welding connections) from the vibration motor structure. Instead of using traditional wired electrical connections, the invention employs wireless power transmission through electromagnetic coupling between a primary coil and secondary coil, thereby eliminating the harmful factor of complex cabling while maintaining reliable electrical connection functionality
Solution Approach 2:
The patent replaces the mechanical electrical connection system (physical wires and welding joints) with an electromagnetic field-based power transmission system. The primary coil generates an alternating magnetic field that induces current in the secondary coil, substituting the mechanical cabling approach with a field-based energy transfer mechanism that reduces structural complexity and improves reliability
2Reliability
If welding a conductive wire to a circuit board is used for electrical connection, then electrical connection is achieved, but it occupies relatively large space
Solution Approach 1:
The patent extracts and removes the space-consuming cabling system from the vibration motor. By eliminating conductive wires and welding connections, the invention significantly reduces the volume occupied by electrical connection components, allowing for a more compact overall motor design while maintaining reliable power transmission through electromagnetic coupling
Solution Approach 2:
The patent replaces the space-intensive mechanical cabling system with a compact electromagnetic field-based power transmission system. The primary and secondary coils can be arranged in close proximity, enabling efficient power transfer without the need for bulky wires and connection components, thereby reducing the overall volume of the vibration motor
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 solution simplifies the motor structure, saves space, and enhances reliability by avoiding cabling-related issues, thereby improving performance and longevity.
Implementation Method 1
a primary coil 5 electrically connected to the circuit board. The driving apparatus is a secondary coil 222 disposed separately from the primary coil 5. The primary coil 5 is electrically connected to the outside and generates an alternating electromagnetic field
Implementation Method 2
The primary coil 5 is electrically connected to the outside and generates an alternating electromagnetic field, to cause the secondary coil to generate an induced electromotive force
Data Source
AI summary
A vibration motor in the present disclosure includes a housing having an accommodating space, a first vibrator accommodated in the housing and having a magnetic steel, a driving apparatus disposed opposite to the magnetic steel and configured to drive the first vibrator, an elastic part elastically supporting the first vibrator, and a circuit board. The vibration motor further includes a primary coil electrically connected to the circuit board. The driving apparatus is a secondary coil disposed separately from the primary coil. The primary coil is electrically connected to the outside by using the circuit board to generate an alternating electromagnetic field, to cause the secondary coil and generates an induced electromotive force, and cause relative vibration between the secondary coil and the first vibrator. The present disclosure simplified structure, saved space, and avoided reliability problems such as winding and breaking, thereby effectively improving the product reliability performance.