Ultrasonic Speaker Case With Inward Protrusions
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ultrasonic speakers with a stepped case design result in a gap between adjacent units, reducing the effective vibration area and substrate size compatibility, leading to inefficient parametric speaker performance.
Innovation Solution
An ultrasonic speaker with a case featuring inward protrusions on its inner surface, allowing a substrate to be placed on these protrusions, which reduces the gap between units and aligns the inner and outer diameters, enhancing the effective vibration area and parametric speaker characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a stepped case structure is used with smaller inner diameter at the bottom, then the substrate can be positioned, but gaps occur between adjacent ultrasonic speakers reducing effective vibration area
Solution Approach 1:
The case structure transitions from a simple stepped configuration to a cylindrical geometry with inwardly protruding ribs that extend vertically. This dimensional change allows the inner diameter to remain larger at the bottom while still providing substrate positioning through the protrusions, eliminating gaps between adjacent speakers and maximizing the effective vibration area.
2Productivity
If ultrasonic speakers are arranged densely, then space utilization improves, but gaps between adjacent units increase reducing vibration area
Solution Approach 1:
By introducing vertical protrusions on the inner surface of the case, the design creates a three-dimensional positioning system that allows ultrasonic speakers to be arranged more densely in the horizontal plane without creating gaps. The protrusions provide precise positioning that maintains optimal spacing while maximizing space utilization and vibration area.
3Ease of manufacture
If the inner diameter of the case bottom is made smaller, then substrate placement is simplified, but the outer diameter of the bottom surface becomes smaller than the substrate size
Solution Approach 1:
The case design incorporates vertical protrusions that extend from the inner surface, creating a multi-dimensional positioning structure. This allows the bottom surface to have a larger inner diameter that accommodates the substrate while the protrusions provide the necessary positioning functionality, eliminating the need to reduce the bottom diameter and maintaining proper dimensional relationships.
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 configuration increases the effective vibration area and improves the parametric speaker's performance by minimizing gaps between units and ensuring proper substrate alignment, facilitating easier assembly and sealing.
Implementation Method 1
a piezoelectric element fixed to a bottom surface in the case
Implementation Method 2
an effective vibration area can be increased
Data Source
AI summary
An ultrasonic speaker comprises a case that has an opened top surface and includes a plurality of protrusions protruding inward on an inner side surface of the case, a piezoelectric element fixed to a bottom surface in the case, and a substrate that is inserted in the case and placed on upper surfaces of the plurality of protrusions.