Vehicle Door Handle Illumination Sealing Against Water Ingress
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Solution Overview
Problem
Existing vehicle door handles lack effective illumination in dim light environments and often suffer from water ingress issues that compromise the functionality of illumination modules.
Innovation Solution
A door handle assembly with a light-transmitting handle cover, an integrated illumination unit, and a sealing element that prevents water ingress, featuring a snap-fit connection and ribs to guide water away from the light-transmitting area, ensuring illumination visibility and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-transmitting handle cover is used to provide illumination visibility, then illumination intensity is improved, but water ingress risk increases
Solution Approach 1:
The handle cover is segmented into light-transmitting and water-resistant zones. The illumination unit is separated from the handle cover by a sealing element, allowing the handle cover to be light-transmitting while the sealing interface prevents water ingress. This segmentation enables simultaneous achievement of illumination visibility and water protection.
Solution Approach 2:
A sealing element is introduced as an intermediary component between the illumination unit housing and the handle cover. This sealing element creates a water-tight barrier while allowing the handle cover to maintain its light-transmitting properties. The sealing element mediates between the conflicting requirements of light transmission and water protection.
2Reliability
If a sealing element is added to prevent water ingress, then reliability is improved, but device complexity increases
Solution Approach 1:
The sealing element is integrated into the existing assembly structure by being clamped between the illumination unit housing and the handle cover. This merging approach incorporates the sealing function into the existing mechanical connection without requiring separate mounting brackets or additional fastening mechanisms, thereby minimizing the increase in device complexity.
Solution Approach 2:
The sealing element serves multiple functions: it prevents water ingress, provides mechanical connection between components, and maintains the light-transmitting interface. By combining multiple functions into a single component, the overall device complexity is minimized while achieving reliable water protection.
3Object-affected harmful factors
If ribs are added to guide water away, then water ingress prevention is improved, but manufacturing complexity increases
Solution Approach 1:
The ribs are designed with specific geometric parameters (height, spacing, orientation) that optimize water guidance while minimizing molding complexity. By carefully selecting these parameters, the ribs effectively guide water away from the light-transmitting area without requiring complex multi-cavity molds or post-molding operations.
Solution Approach 2:
The ribs are localized to specific areas of the handle cover where water guidance is most needed, particularly around the periphery of the light-transmitting area. This local quality approach applies the water guidance feature only where necessary rather than throughout the entire handle cover, reducing overall manufacturing complexity.
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
The assembly provides reliable illumination in dim light conditions while preventing water ingress, maintaining the functionality and aesthetic appeal of the door handle.
Implementation Method 1
the handle cover comprises a light-transmitting area made of a light-transmitting material
Implementation Method 2
The sealing element is clamped between the front wall and the handle cover and arranged around the light-transmitting area of the handle cover to seal a gap between the front wall and the light-transmitting area
Implementation Method 3
The sealing element is clamped between the front wall and the handle cover and arranged around the light-transmitting area of the handle cover to seal a gap
Implementation Method 4
featuring a snap-fit connection and ribs to guide water away from the light-transmitting area
Data Source
AI summary
The present disclosure provides a door handle assembly for a vehicle comprising a handle seat, a handle cover, an illumination unit, and a sealing element. The handle seat comprises a cavity and an opening connecting with the cavity. The handle cover covers the opening of the handle seat to close the cavity, and the handle cover comprises a light-transmitting area made of a light-transmitting material. The illumination unit is held in the cavity, and the illumination unit comprises a housing and an illumination element enclosed in the housing. The housing comprises a front wall facing the handle cover, and the front wall is made of the light-transmitting material. The sealing element is clamped between the front wall and the handle cover and arranged around the light-transmitting area of the handle cover to seal a gap between the front wall and the light-transmitting area of the handle cover from the outside.