Twist-Lock Ventilation System for Vehicle Lighting Sealing
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Solution Overview
Problem
Existing ventilation systems for vehicle lights face challenges in simple assembly, secure fixing, and ensuring a high degree of sealing, while also requiring variable use.
Innovation Solution
A ventilation system design featuring a twist-lock mechanism where the ventilation body rotates relative to the housing opening, incorporating sealing walls and locking elements to achieve a stable and coded fixation, forming a labyrinthine ventilation channel for secure sealing and preventing liquid entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cap-shaped ventilation body is placed axially on a housing opening and fixed in a latching manner, then the assembly is simple, but the sealing degree and long-term stability are insufficient
Solution Approach 1:
The ventilation body is divided into an inner part and an outer part that can be rotated relative to each other. The inner part remains axially fixed while the outer part rotates to engage locking elements, creating segmented functional zones that simplify assembly while ensuring reliable sealing through the rotation-locked configuration
Solution Approach 2:
The fixing mechanism transitions from a static axial insertion to a dynamic rotation process. The outer part rotates by a predetermined angle to bring locking elements into engagement with corresponding features on the housing opening, creating a progressive fixing process that maintains simplicity while achieving superior sealing and stability
2Reliability
If a latching element is snapped axially into an opening with barb-shaped ends, then the fixing is secure, but the assembly process is complex and time-consuming
Solution Approach 1:
The latching function is segmented between the inner part (which provides the opening) and the outer part (which contains the locking elements). This segmentation allows the locking action to occur through simple rotation rather than complex axial snapping, maintaining fixing security while dramatically simplifying and accelerating the assembly process
Solution Approach 2:
The fixing action is transformed from a static, force-intensive axial snapping operation to a dynamic rotation process. The locking elements engage through rotational movement, which is naturally faster and requires less force, thereby improving assembly speed while maintaining reliable fixation
3Reliability
If the ventilation body is designed to rotate by a predetermined angle, then long-term stable fixation and coding are achieved, but the device complexity increases
Solution Approach 1:
The rotation mechanism is implemented by segmenting the ventilation body into inner and outer parts with different functional characteristics. The inner part provides the basic sealing and positioning, while the outer part executes the rotation and engages locking elements, distributing complexity across segmented functional zones rather than requiring a completely complex new mechanism
Solution Approach 2:
The outer part serves multiple functions: it provides the rotating element for angle-based fixation, contains the locking elements for secure engagement, and creates the labyrinthine ventilation channel. This multi-functionality reduces overall device complexity by combining several functions into a single rotating component
4Reliability
If the ventilation channel has multiple deflections in a labyrinthine pattern, then sealing efficiency is high, but the ventilation channel length and pressure loss increase
Solution Approach 1:
The labyrinthine ventilation channel is created by segmenting the space between the inner and outer parts into multiple deflected sections. Each deflection serves as a sealing zone while the overall path remains optimized for airflow, achieving high sealing efficiency through segmented geometric design rather than excessive channel length
Solution Approach 2:
The ventilation channel employs smooth curved deflections rather than sharp angles, and the outer part has a substantially spherical shape. These curved transitions reduce flow separation and turbulence, minimizing pressure loss while maintaining the multiple deflections needed for effective sealing
Data Source
Figure 1~3
Figure 4~5
Figure 6~8
AI summary
The invention relates to a ventilation system for vehicle lighting comprising a housing opening (1) with a projecting opening wall (3, 8) and a ventilation element (2) which is fixed to the housing opening (1) by the engagement of an inner part thereof, wherein the ventilation element (2) and the housing opening (1) have walls (17, 25, 28) for forming a ventilation channel with several deflections between an edge of the ventilation element (2) and an opening in the housing opening (1), wherein the inner part (11) and an outer part (12) surrounding the opening wall (3, 8) of the housing opening (1) have walls (17), 25, 28) which each bear in a circumferentially sealing manner against the opening wall (3, 8) of the housing opening (1), and the ventilation element (2) and the housing opening (1) are designed such thatthat the ventilation element (2) 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 (1).