Suspended Vibration Exciter Layout for Balanced Screen Sounding
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Solution Overview
Problem
Existing vibration exciters for screen-sounding smartphones have poor balance performance, requiring separate devices for screen sounding and vibration, which occupy space and compromise balance.
Innovation Solution
A vibration exciter design featuring a shell with a suspended vibration unit, driven by a coil and supported by elastic members with projections into fixing planes, ensuring balanced vibration through a cylindrical casing and magnetic components for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate devices are used for screen sounding and vibration, then the functions are achieved, but the occupied volume increases and balance performance deteriorates
Solution Approach 1:
The patent combines the screen sounding function and vibration function into a single exciter device. The exciter includes a vibration unit that can generate both acoustic waves for screen sounding and mechanical vibrations for tactile feedback, eliminating the need for separate devices and improving balance performance while reducing occupied volume.
Solution Approach 2:
The exciter is designed as a multi-functional device that can perform both screen sounding (acoustic output) and vibration generation (tactile feedback) using the same core components. The vibration unit serves dual purposes: generating sound waves when close to the screen and providing vibration feedback when activated, making the device universal and reducing the need for multiple specialized components.
2Reliability
If the projection of the elastic member is located in the fixing planes, then the vibration balance is improved, but the structural complexity increases
Solution Approach 1:
The elastic member is designed with a specific local geometry where its projection is located within the fixing planes of the mass block. This local geometric arrangement ensures that the elastic member's stiffness and support characteristics are optimized at the critical locations (fixing planes), improving vibration balance without requiring complex overall structural changes. The local quality of the elastic member's geometry at its connection points is what matters most.
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 design achieves improved vibration balance and stability, reducing occupied space while enabling effective screen sounding and tactile feedback.
Implementation Method 1
a coil configured to drive the vibration unit
Implementation Method 2
an elastic member configured to suspend the vibration unit in the shell
Data Source
AI summary
Provided is a vibration exciter, comprising a shell having a receiving space, a vibration unit suspended in the shell, a coil configured to drive the vibration unit, and an elastic member configured to suspend the vibration unit in the shell. The vibration unit comprises a mass block fixedly connected to the elastic member. The mass block comprises fixing planes opposite to each other along a vibration direction. The elastic member has one end fixed to the mass block and another end fixed to the shell, and a projection of the elastic member in the vibration direction is at least partially located in the fixing planes. Compared with the related art, the vibration exciter provided by the present invention can improve the vibration stability.