Rearview Mirror Seal Testing Using Transparent Mounting and Shims
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Solution Overview
Problem
Conventional methods for testing the seal quality of exterior rearview mirror assemblies on vehicles are inadequate as they only indicate contact areas and do not provide information on the amount or quality of the seal, making it difficult to determine the root cause of sealing failures such as leaks.
Innovation Solution
A method involving a partially transparent mounting surface and shims/feeler gauges to test and evaluate the seal quality by mimicking the vehicle attachment, allowing direct observation and measurement of the sealant compression and gaps, enabling adjustments for a uniform and continuous seal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional seal testing methods are used, then the testing process is simple, but the measurement precision of seal quality is insufficient
Solution Approach 1:
A transparent mounting surface is introduced as an intermediary component between the sealant and the observer. This mounting surface allows direct visual inspection of the sealant application quality, transforming an otherwise invisible sealing process into an observable one. The transparent mounting surface serves as a mediator that enables quality assessment without adding complex measurement devices.
Solution Approach 2:
The patent replaces complex mechanical measurement systems with optical observation methods. Instead of using sophisticated sensors or measurement devices to assess seal quality, the solution uses the transparency of the mounting surface to allow direct visual inspection, substituting mechanical/complex measurement systems with simple optical observation.
2Loss of information
If sealant application is tested without transparent mounting surface, then the manufacturing process is simple, but the information on seal amount and quality is lost
Solution Approach 1:
The patent changes the optical parameter (transparency) of the mounting surface to enable seal quality observation. By selecting a mounting surface material with high transparency, the sealant application becomes visible, allowing quality assessment. This parameter change from opaque to transparent enables information visibility without fundamentally altering the manufacturing process.
3Reliability
If conventional testing methods are used, then the testing time is short, but the reliability of seal quality assessment is insufficient
Solution Approach 1:
The transparent mounting surface is prepared in advance during the manufacturing process, enabling immediate quality assessment as soon as the sealant is applied. This preliminary preparation of the transparent mounting surface eliminates the need for separate, time-consuming quality assessment procedures, allowing real-time verification of seal quality.
Data Source
AI summary
A method of testing a seal of a rearview mirror assembly includes providing a mounting arm for a vehicular exterior rearview mirror assembly. The mounting arm includes an attachment end configured to be mounted at an exterior portion of a vehicle and providing a mounting element that is at least partially transparent. The attachment end is mounted to the mounting element with sealant disposed between the mounting arm and the mounting element to establish a test seal between the mounting arm and the mounting element. A shim is disposed between the mounting arm and the mounting element. A thickness of the shim is based on a threshold interference level of the test seal. Based on a determination of a gap between the mounting arm and the mounting element, determining that an interference between the mounting arm and the sealant is less than the threshold interference level of the test seal.