Vibration Motor Feedback Structure Using Pressure-Sensitive Sensing
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Solution Overview
Problem
Existing vibration motors fail to realize feedback control of their vibration, resulting in suboptimal user experience, especially in electronic devices with high vibration feedback requirements.
Innovation Solution
A vibration motor design incorporating a vibration feedback control unit with a flexible circuit board, pressure-sensitive block, and elastic support member to monitor and adjust vibration performance in real-time, utilizing a polymer conductive material and elastic assembly to transmit vibrations and electrical signals for improved feedback control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional vibration motor structure is used, then the device complexity is low, but the vibration feedback control capability is insufficient
Solution Approach 1:
The patent implements feedback control by using a pressure-sensitive block to detect vibration state and feed this information back to adjust the electromagnetic drive unit's operation. This closed-loop feedback mechanism enables real-time vibration feedback control, directly resolving the contradiction between maintaining simple structure and achieving reliable feedback control capability.
Solution Approach 2:
The elastic support member serves multiple functions: it supports the magnet-conducting plate, transmits vibration to the pressure-sensitive block, and provides elastic restoration. By making one component perform multiple functions, the patent adds feedback control capability without proportionally increasing device complexity.
2Force
If the magnet-conducting plate is positioned close to the electromagnetic drive unit for strong vibration, then the vibration intensity is high, but the risk of electromagnetic interference and mechanical contact increases
Solution Approach 1:
The patent applies local quality by creating a localized strong electromagnetic field in the gap between the electromagnetic drive unit and magnet-conducting plate, while maintaining spatial separation. The electromagnetic field is concentrated where needed for vibration generation, but the physical components remain spaced apart to avoid interference and contact, resolving the contradiction between vibration intensity and operational stability.
Solution Approach 2:
The magnet-conducting plate acts as an intermediary that converts electromagnetic force from the drive unit into mechanical vibration of the elastic assembly. By positioning it within the electromagnetic field range but spaced from the drive unit, it effectively transmits force while preventing direct contact and electromagnetic interference, maintaining both vibration intensity and reliability.
3Stability of the object's composition
If the elastic assembly is made more rigid for stable support, then the support stability is improved, but the vibration transmission sensitivity decreases
Solution Approach 1:
The elastic assembly is designed with dynamic characteristics that allow it to be stable in its resting state while remaining sensitive to vibration forces. The elastic properties enable the assembly to adapt between stable support and sensitive vibration transmission based on operational conditions, resolving the contradiction between support stability and vibration transmission sensitivity.
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
Enhances user experience by enabling real-time adjustment of vibration performance, improving sensitivity and reliability while maintaining a compact size, suitable for various electronic devices.
Implementation Method 1
The electromagnetic drive unit is electrically energized to form a point magnet and forms a suction force of alternate phasing to the magnet-conducting plate
Implementation Method 2
a pressure-sensitive block, wherein the pressure-sensitive block is made of polymer conductive material
Implementation Method 3
an elastic assembly supporting the magnet-conducting plate on the base and suspended above the electromagnetic drive unit
Data Source
AI summary
Provided is a vibration motor, including a base, an electromagnetic drive unit, a vibration unit, and a vibration feedback control unit. The electromagnetic drive unit includes a magnet-conducting plate and an elastic assembly. The vibration feedback control unit includes a flexible circuit board, a pressure-sensitive block, and an elastic support member. The flexible circuit board includes a circuit board main body, a first circuit board extension, and a second circuit board extension. The pressure-sensitive block is spaced below the vibration unit. The second circuit board extension is located on the top of the pressure-sensitive block. One end of the elastic support member is fixed to the top of the pressure-sensitive block, and the other end thereof is fixed to the vibration unit for transferring vibrations to the pressure-sensitive block. The vibration motor of the present application has a good vibration effect and a better user experience.