Rear View Light Module Assembly for Compact Waterproof Sealing
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Solution Overview
Problem
Existing light modules for exterior rear view devices are not compact, easy to mount, or waterproof, lacking effective sealing and attachment mechanisms.
Innovation Solution
A light module design featuring a lens unit with insertion openings, a supported printed circuit board unit, and a housing unit with welding tracks and attachment features for secure assembly and sealing, allowing for easy mounting and waterproofing without additional sealing means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional sealing means are added to achieve waterproofing, then water and dustproof performance is improved, but device complexity increases
Solution Approach 1:
The housing unit integrates multiple functions into a single component: it provides structural support, creates sealing through its recesses that receive the lens unit edges, and enables attachment to the rear view device. This merging eliminates the need for separate sealing means while achieving waterproof performance.
Solution Approach 2:
The lens unit serves multiple purposes: it transmits light from the light sources, provides sealing surfaces through its edges that fit into the housing unit recesses, and enables attachment to the rear view device. This multi-functionality reduces the need for additional sealing components.
2Volume of moving object
If a compact design is implemented, then space utilization is improved, but manufacturing complexity increases
Solution Approach 1:
The light module is divided into distinct functional units: the housing unit, the lens unit, and the printed circuit board unit. These segments can be manufactured separately using standard processes and then assembled through simple insertion into recesses, maintaining ease of manufacture while achieving compact integration.
Solution Approach 2:
The printed circuit board unit is inserted into the lens unit, which in turn is inserted into the housing unit. This nested arrangement achieves compact integration of all components while maintaining simple assembly through sequential insertion without complex fastening operations.
3Reliability
If secure attachment mechanisms are added, then attachment reliability is improved, but device complexity increases
Solution Approach 1:
The housing unit integrates the attachment function directly into its structure through attachment features that engage with the rear view device. This merging of attachment functionality into the existing housing structure achieves secure attachment without adding separate attachment mechanisms.
Solution Approach 2:
The lens unit's edges are designed to fit into recesses in the housing unit, creating a self-aligning and self-securing mechanism. The components attach to each other through their inherent geometric features without requiring additional fasteners or complex attachment hardware.
Data Source
AI summary
The present disclosure refers to a light module, comprising a lens unit, which is formed with a bottom, a lid and one or more side walls between the bottom and the lid, wherein the one or more side walls provide one or more insertion openings; a printed circuit board unit, which carries one or more light sources and is inserted into the lens unit through a first insertion opening of the one or more insertion openings such that light emitted by the one or more light sources exits the light module through the bottom and/or the lid of the lens unit; and a housing unit, which is provided with a bottom opening, a lid opening and one or more side walls between the bottom opening and the lid opening, wherein the lens unit is arranged within the housing unit such that the bottom opening of the housing unit is closed by the bottom of the lens unit, the lid opening of the housing unit is closed by the lid of the lens unit, and the one or more insertion openings of the lens unit is closed by the one or more side walls of the housing unit. It also refers to an external rear view device with such a light unit.