Flat Body Actuator Arrangement for Compact Acoustic Signal Generation
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Solution Overview
Problem
Existing actuator arrangements are often bulky, expensive, complex, and inefficient in terms of acoustic performance, failing to effectively generate audible sound signals for musical or speech information.
Innovation Solution
A compact actuator arrangement featuring a metal or composite flat body with an elastic coupling element, an electrodynamic vibration exciter, and a vibration decoupling mechanism to minimize noise transmission, utilizing a coil and magnets within an air gap to produce sound waves while being securely fastened to a vehicle or infrastructure component.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If existing actuator arrangements are used, then they can generate sound signals, but they are bulky and have poor acoustic efficiency
Solution Approach 1:
The patent transitions from traditional three-dimensional bulky actuator arrangements to a two-dimensional flat body configuration. The electrodynamic actuator is mounted on a flat panel that radiates sound acoustically efficient, utilizing the planar surface area to enhance acoustic performance while reducing overall volume.
Solution Approach 2:
The patent changes the physical parameters of the actuator arrangement by using a flat body with specific thickness ranges (0.5-5mm) and material properties. This parameter optimization enables compact sizing while maintaining high acoustic efficiency through controlled vibration transmission and radiation characteristics.
2Device complexity
If existing actuator arrangements are used, then they can generate sound signals, but they are complex and expensive
Solution Approach 1:
The patent divides the actuator arrangement into distinct functional segments: the flat body (radiator), the electrodynamic actuator (driver), and the fastening device (mounting). This segmentation allows each component to be manufactured separately using simple processes and then assembled, reducing overall complexity and manufacturing cost.
Solution Approach 2:
The fastening device is designed to be self-contained with integrated vibration decoupling elements, eliminating the need for separate mounting brackets, dampers, and adjustment mechanisms. This self-service design simplifies the overall structure and reduces manufacturing complexity.
3Reliability
If the actuator is directly fastened to the vehicle, then secure mounting is achieved, but noise transmission to the vehicle interior increases
Solution Approach 1:
The fastening device acts as an intermediary between the actuator and the vehicle mounting surface. It incorporates vibration decoupling elements that isolate the actuator from the vehicle structure, preventing direct transmission of vibrations and noise while maintaining secure mechanical mounting.
Solution Approach 2:
The patent converts the potentially harmful vibrations generated by the actuator into beneficial sound radiation. The flat body is designed to radiate sound acoustically efficiently, and the vibration decoupling elements are optimized to allow controlled vibration transmission that enhances acoustic performance while minimizing noise transmission to the vehicle interior.
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 solution achieves high acoustic efficiency, compactness, and reduced noise transmission to the vehicle interior, enabling clear sound emission of musical or speech signals with improved robustness and cost-effectiveness.
Implementation Method 1
an electrodynamic vibration exciter with a coil and magnets within an air gap to produce sound waves
Implementation Method 2
The flat body is connected to the actuator by means of a coupling element, which is in particular elastic in design
Implementation Method 3
a vibration decoupling mechanism to minimize noise transmission
Data Source
Figure 1~2
Figure 3a~4d
Figure 5a~7
AI summary
Actuator arrangement, wherein the actuator (1) comprises an electric drive for converting electrical signals into mechanical forces and/or displacements, wherein the drive has at least one coil through which the current of the electrical signal can flow and has at least one magnet which can interact electromagnetically with the coil, wherein the actuator (1) is connected to a planar body (3) and can excite this planar body (3) to vibrate, whereby the planar body (3) can emit acoustic sound, wherein the planar body (3) is mechanically connected at at least two receiving points (4, 5) of a fastening device (4, 5, 6, 7) to this fastening device (4, 5, 6, 7), which has at least one fastening means (6, 20), for fastening in particular to a vehicle and/or a vehicle component and/or to an infrastructure object.