Replaceable Cover Lens Adhesive Assembly for Vehicle Lighting
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Solution Overview
Problem
Existing motor vehicle lighting devices face challenges in replacing cover lenses due to the use of permanent adhesives that require heating and supplementary fasteners, making the process difficult and messy.
Innovation Solution
A dual adhesive bond system is introduced, where a first adhesive bond is formed during manufacturing and a second bond is created after removal, using a circumferential channel and collar design to facilitate easy replacement of the cover lens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a permanent adhesive bond is used to attach the cover lens to the housing, then the bond strength and durability are improved, but the ease of replacement deteriorates
Solution Approach 1:
The adhesive bonding system is segmented into two distinct adhesive beds: a first adhesive bed providing permanent bonding strength, and a second adhesive bed enabling replacement. This segmentation allows the system to simultaneously achieve both strong initial bonding and easy replaceability by targeting different functional requirements with separate adhesive applications.
Solution Approach 2:
The invention changes the adhesive parameters by using different adhesive types in different locations. The first adhesive bed uses permanent adhesive with high bond strength parameters, while the second adhesive bed uses releasable adhesive with lower bond strength but higher ease of removal parameters. This parameter differentiation resolves the contradiction between strength and replaceability.
2Ease of repair
If supplementary fasteners are added to enable replacement of the cover lens, then the ease of replacement is improved, but the device complexity increases
Solution Approach 1:
The adhesive bed serves multiple functions: it provides bonding strength, sealing, and controlled releasability. By making the adhesive system multi-functional, the invention eliminates the need for separate supplementary fasteners, thereby maintaining ease of replacement without increasing device complexity.
Solution Approach 2:
The invention merges the functions of bonding and sealing into a single integrated adhesive system. The adhesive bed simultaneously provides both the attachment function and the sealing function, eliminating the need for separate fastening mechanisms and reducing overall assembly complexity while maintaining replaceability.
3Object-affected harmful factors
If the cover lens is sealed with adhesive to protect against environmental factors, then the protection against harmful factors is improved, but the ease of replacement deteriorates
Solution Approach 1:
The sealing function is segmented and assigned to the first adhesive bed, while the second adhesive bed is positioned inward and does not compromise the external seal. This segmentation allows the outer seal to remain intact for environmental protection while the inner adhesive bed enables controlled replacement without breaching the protective seal.
Solution Approach 2:
The first adhesive bed is applied in advance during manufacturing to establish the protective seal before the cover lens is subjected to environmental conditions. This preliminary sealing action ensures environmental protection is already in place, and subsequent replacement actions can be performed without compromising this pre-established protective barrier.
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
Enables easy and clean replacement of cover lenses by mechanically releasing the first bond and forming a second bond, allowing for damage repair and component access without complex tools or residue issues.
Implementation Method 1
The cover lens is normally attached to the housing with an adhesive bond, which also seals the housing
Data Source
AI summary
An attachment assembly is provided for a cover lens on a housing. The cover lens is attached to the housing by a first adhesive bond with a circumferential adhesive bed. A second adhesive bond is formed with a circumferential adhesive bed between the cover lens and the housing.