MEMS Loudspeaker Connecting Element Mass Reduction

Solution Overview

Problem

Microelectromechanical devices and loudspeakers face challenges in achieving weight savings while maintaining sufficient rigidity and efficiency, particularly in terms of frequency response and power consumption, due to the limitations of traditional solid fastener elements.

Innovation Solution

A microelectromechanical device with a displacer unit featuring a movable displacer element and a connecting element that includes a base structure with a mass reduction portion, such as a material recess, to reduce mass and enhance rigidity, allowing for easier and quicker driving of the connecting element, thereby influencing the natural frequency and reducing parasitic modes, and improving transient response and efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Weight of moving object

If traditional solid fastener elements are used, then structural strength is maintained, but weight increases and frequency response deteriorates

Engineering Contradiction:

Core Design Contradiction:

Weight of moving objectVSStrength

Solution Approach 1:

The base structure is designed with a porous or lattice internal structure instead of solid material, reducing mass while maintaining structural integrity through the distributed framework of the lattice geometry

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The base structure is divided into a lattice framework consisting of multiple interconnected struts or beams, segmenting the solid material into a distributed network that provides strength through geometric configuration rather than material volume

Inventive Principle:

Principle #1Segmentation

2Speed

If mass reduction portion is added to base structure, then natural frequency increases and transient response improves, but manufacturing complexity increases

Engineering Contradiction:

Core Design Contradiction:

SpeedVSEase of manufacture

Solution Approach 1:

The mass reduction portion is integrated into the base structure as a unified lattice design rather than being added as a separate component, combining weight reduction and structural functions into a single manufacturable element

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The lattice parameters such as strut thickness, spacing, and unit cell geometry are optimized to achieve the desired natural frequency and transient response characteristics while maintaining manufacturability through standard fabrication processes

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250019228A1Microelectromechanical device and microelectromechanical loudspeaker

Publication Date: 2025.01.16

AI summary

A microelectromechanical device for generating a fluid pressure using a displacer unit. The displacer unit has a movable displacer element, which can be deflected to generate a fluid pressure using a drivable connecting element acting on the displacer element. The connecting element has a base structure and a coupling structure connected to the base structure for connecting the connecting element to the displacer element. The base structure includes a mass reduction portion with a material recess. A microelectromechanical loudspeaker having such a microelectromechanical device is also described.