Vehicle Lighting Ventilation System with Twist-Lock and Labyrinth Channel
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Solution Overview
Problem
Existing ventilation systems for vehicle lighting lack simple assembly and secure fixing, with poor haptic feedback making incorrect assembly difficult to detect, and they provide limited protection against dust ingress due to the absence of a labyrinthine ventilation channel.
Innovation Solution
A ventilation system with a ventilation body featuring a membrane perpendicular to the housing opening, an inner part protruding into the housing, and an outer part forming a radial projection, creating a labyrinthine ventilation channel and a twist-lock mechanism for secure fixation, preventing incorrect assembly through coding of ventilation bodies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a ventilation body with latching fingers is used to attach to a housing opening, then assembly is simplified, but secure fixing and haptic feedback are insufficient
Solution Approach 1:
The ventilation element is designed as a rotatable component that transitions from a non-locking position to a locking position through rotational movement. This dynamic mechanism provides audible and haptic feedback when locked, ensuring secure fixation while maintaining simple assembly through the rotational motion rather than complex threading or multiple fasteners.
Solution Approach 2:
The locking mechanism incorporates audible and haptic feedback to confirm when the ventilation element has reached its locked position. This feedback mechanism allows the user to verify correct assembly without additional tools or complex procedures, resolving the contradiction between simple assembly and reliable fixation.
2Productivity
If a breathable membrane is used on the ventilation body, then air exchange is enabled, but protection against dust ingress is limited
Solution Approach 1:
The ventilation channel is designed with multiple deflections that create a labyrinthine path through three-dimensional space. This multi-directional channel structure forces air to follow a complex route with several bends, significantly increasing the difficulty for dust particles to penetrate while maintaining effective air exchange through the breathable membrane.
3Object-affected harmful factors
If a labyrinthine ventilation channel is formed, then protection against dust ingress is improved, but device complexity increases
Solution Approach 1:
The labyrinthine ventilation channel is integrated directly into the ventilation body as a unified structure rather than being a separate component. The ventilation channel with its multiple deflections is formed as part of the ventilation element itself, combining the dust protection function with the ventilation function in a single component, thus reducing overall device complexity while maintaining effective dust ingress protection.
4Reliability
If the ventilation element is made rotatable for locking, then secure fixing and coding are achieved, but manufacturing complexity increases
Solution Approach 1:
The ventilation body is segmented into distinct functional parts: a rotatable ventilation element and a stationary housing opening with a receiving opening. This segmentation allows each component to be manufactured separately using standard molding techniques, then assembled through simple rotational locking, reducing overall manufacturing complexity while achieving secure fixation and coding capabilities.
Data Source
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AI summary
Ventilation system for vehicle lighting. Lighting device for vehicles with a housing comprising: - a housing opening (1) with an outwardly projecting opening wall, - a ventilation body (2) which is fixed to the housing opening and which has a ventilation element (3), a membrane (4) and a cap (5) covering an end face of the ventilation body facing away from the housing opening, wherein a ventilation channel having several deflections is formed between an edge of the ventilation element (3) and the housing opening (1), wherein - the ventilation body has a receiving opening (6) on the end face facing away from the housing opening (1) for receiving the membrane (4), wherein the membrane extends perpendicular to an axial direction of the housing opening and the ventilation element, - the ventilation element has an outer part (11) which provides a radial projection (18),the edge of which is arranged at a distance from the housing opening to form a first deflection of the ventilation channel, - the ventilation element has an inner part (8) projecting into the housing opening, which has a radial opening arranged in an area between the membrane and the cap and facing the radial projection to form a second deflection of the ventilation channel as well as an axial opening releasing an axial section of the ventilation channel, - the ventilation element and the housing opening are designed such that the ventilation element can be moved from a non-locking position to a locking position or vice versa by rotation according to a predetermined angle of rotation relative to the housing opening.