Slim Speaker Structure with Piezoelectric Ceramic Elements
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Solution Overview
Problem
Current speaker and vibration elements in 3C products, such as cellular phones and tablets, cannot be miniaturized to be both lighter and thinner due to the use of micromotors, making it difficult to reduce the thickness of these devices as they cannot be configured on the same plane.
Innovation Solution
A slim speaker structure is designed with ceramic elements configured on a frame, where different response frequencies of vibration and sound ceramic elements are mounted on specific accepting portions, allowing sound broadcasting and vibration prompts to be achieved on the same plane, utilizing a strip-typed overhanging section for the first accepting portion and a corrugated arch section for the second accepting portion to minimize oscillatory wave interference and enhance sound quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If micromotor with eccentric wheel is used in vibration elements, then vibration function is achieved, but volume and thickness increase making it difficult to conform with product requirements
Solution Approach 1:
The patent replaces the traditional micromotor-based mechanical vibration system with a piezoelectric ceramic element that generates vibration through electrical-to-mechanical energy conversion. This substitution eliminates the need for complex mechanical components like eccentric wheels, significantly reducing the volume and thickness of the vibration element while maintaining reliable vibration function.
Solution Approach 2:
The patent changes the operating parameters by using piezoelectric ceramic elements that respond to different frequency signals. The vibration ceramic element responds to high-frequency signals (e.g., 20-100 kHz) while the sound ceramic element responds to low-frequency signals (e.g., 20-2000 Hz), allowing both functions to coexist in a thin structure without mechanical interference.
2Volume of moving object
If miniaturized speaker and vibration elements are used, then size is reduced, but they cannot be configured on the same plane making product thickness reduction difficult
Solution Approach 1:
The patent merges the speaker and vibration element functions into a single integrated structure where both piezoelectric ceramic elements are mounted on the same plane of a common frame. The vibration ceramic element and sound ceramic element are positioned adjacent to each other, sharing the same structural platform and eliminating the need for stacked configurations, thereby enabling product thickness reduction.
Solution Approach 2:
The patent transitions from a vertical stacking arrangement to a horizontal planar arrangement by configuring both ceramic elements on the same plane. This dimensional change allows the vibration and sound functions to coexist without increasing product thickness, as they are distributed laterally rather than vertically.
3Length of stationary object
If ceramic elements are configured on the same plane, then product thickness is reduced, but oscillatory wave interference may affect sound quality
Solution Approach 1:
The patent extracts the harmful oscillatory waves generated by the vibration ceramic element through dedicated vibration-absorbing structures attached to the frame. These structures are specifically designed to capture and dissipate the high-frequency oscillations before they can interfere with the sound ceramic element, thereby protecting sound quality while maintaining the thin planar configuration.
Solution Approach 2:
The patent introduces intermediary vibration-absorbing structures as mediators between the vibration ceramic element and the sound ceramic element. These intermediate components serve as buffers that absorb and isolate the oscillatory waves, preventing them from reaching the sound element and causing interference, thus enabling coexistence on the same plane without compromising sound quality.
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 enables the slim speaker structure to be applied on thin products like cellular phones and tablets, reducing overall thickness and improving sound quality by allowing both vibration and sound broadcasting on the same plane without the need for micromotors, thus enhancing product competitiveness.
Implementation Method 1
different response frequencies of vibration and sound ceramic elements
Implementation Method 2
different response frequencies of vibration and sound ceramic elements
Implementation Method 3
the overhanging section between the first accepting portion and frame is a strip-typed and approximately continuously bended body, can eliminate oscillatory wave interference
Implementation Method 4
allows the second accepting portion to be coupled to the main body of the frame with corrugated arch section, thereby to constitute an elastic wave action of a general speaker, and further increase the sound quality
Data Source
AI summary
A slim speaker structure having a vibration effect includes a frame, ceramic elements configured on a surface of the frame, and a sound membrane disposed on the bottom of frame, where at least two first accepting portions are respectively configured on the frame adjacent to the sides thereof, allowing the corners of the first accepting portions to be respectively coupled to the main body of the frame with an overhanging section, and a second accepting portion is configured on the center of the frame, thereby allowing different response frequencies of vibration and sound ceramic elements to be mounted on the respective first and second accepting portions so as to constitute a slim speaker structure having a vibration effect, capable of being applied on cellular phones or tablets with a touch screen. Therefore, the vibration prompt and sound broadcasting can be constituted at the same plane through the different ceramic elements.