Vehicle Door Speaker Mounting With Dry-Side Drive Circuit
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Solution Overview
Problem
Rainwater or moisture entering the vehicle door can reduce the reliability of the electrical circuit and sound quality of the speaker due to exposure of the filter capacitor in the drive circuit.
Innovation Solution
The electroacoustic transducer is designed with a watertight connection to the partition, positioning the electrical elements, such as the capacitor, within the vehicle's dry interior space to prevent moisture ingress and enhance reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the speaker is mounted in a vehicle door with a movable window, then the speaker can be installed in a convenient location, but rainwater or moisture can enter the door frame and reach the filter capacitor, reducing electrical circuit reliability
Solution Approach 1:
The patent divides the speaker system into separate functional components: the vibration unit (speaker) and the electrical element (filter capacitor) are positioned in different spatial zones. The vibration unit is mounted on the interior side of the door where it can be easily installed, while the electrical element is positioned on the exterior side, separated from the moisture-prone environment. This segmentation allows each component to be optimally positioned for its function while protecting sensitive electronics from environmental damage.
2Device complexity
If the filter capacitor is exposed in the drive circuit, then the electrical circuit can be simplified, but moisture ingress reduces the reliability of the electrical circuit
Solution Approach 1:
The patent resolves the contradiction by transitioning from a two-dimensional planar arrangement to a three-dimensional spatial separation. Instead of simply protecting the capacitor with a cover in the same plane, the invention positions the electrical element in a different spatial dimension (on the exterior side of the door panel) and connects it through a through-hole. This dimensional change allows the circuit to remain electrically simple while physically separating the sensitive component from the moisture environment.
3Ease of manufacture
If the electrical element is positioned on the interior side of the door, then the installation is simplified, but moisture can reach the component and reduce reliability
Solution Approach 1:
The patent extracts the electrical element (filter capacitor) from the interior mounting space and relocates it to the exterior side of the door panel. By taking out this component from the moisture-prone interior environment and positioning it on the exterior side where it can be sealed against moisture, the invention maintains installation simplicity while significantly improving component reliability. The extraction is facilitated by providing a through-hole in the door panel for mounting the electrical element.
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 improves the reliability of the electrical circuit and enhances sound quality by protecting the electrical components from moisture, ensuring they operate effectively within a more suitable environment.
Implementation Method 1
The electroacoustic transducer is inserted into a hole of the partition and connected to the partition in a watertight manner
Data Source
AI summary
Provided is an electroacoustic transducer capable of improving the reliability of a drive circuit and the sound quality. The electroacoustic transducer includes: a vibration unit constituting a part of a partition defining a cabin space of a vehicle; a magnetic circuit on an outside of the cabin space; and an electrical element configured to process an electrical signal for vibrating the vibration unit. The electrical element is located in the cabin space.