Vehicle Room Lamp Screw Assembly for Precise Headliner Mounting

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Solution Overview

Problem

Existing room lamp mounting systems for vehicles using adhesives face issues such as deviation from the predetermined position during assembly, adhesive damage due to vibrations, difficulty in separating the room lamp plate from the head liner, and aesthetic degradation, which complicates maintenance and replacement.

Innovation Solution

A room lamp assembly system that uses screws to fasten a division protrusion passing through overlapping through-holes and assembly holes in the head liner and room lamp plate, eliminating the need for adhesives and allowing for precise and easy assembly and disassembly, with a buffer pad fitted into a seat on the room lamp plate for added protection.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If adhesive is used to mount the room lamp plate on the head liner, then the room lamp plate can be attached to the head liner, but the room lamp plate may deviate from the predetermined position during assembly and the adhesive may be damaged by vibrations

Engineering Contradiction:

Improveattachment reliabilityVSAvoidpositioning precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

A division protrusion is introduced as an intermediary component that passes through through-holes in the head liner and assembly holes in the room lamp plate. This protrusion serves as a positioning mediator that guides the room lamp plate to the predetermined position on the head liner, preventing deviation during assembly while maintaining reliable attachment.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The adhesive-based mounting system is replaced with a mechanical fastening system using screws that secure the division protrusion. This mechanical substitution eliminates the positioning deviation and vibration damage issues associated with adhesives, providing both reliable attachment and precise positioning through the screw-fastened protrusion structure.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If adhesive is used to mount the room lamp plate on the head liner, then the room lamp plate can be attached to the head liner, but the adhesive becomes damaged or broken over time due to vibrations

Engineering Contradiction:

Improveattachment reliabilityVSAvoidservice life

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If adhesive is used to mount the room lamp plate on the head liner, then the room lamp plate can be attached to the head liner, but it becomes difficult to separate the room lamp plate from the head liner for maintenance

Engineering Contradiction:

Improveattachment reliabilityVSAvoiddisassembly ease

Core Design Contradiction:

ReliabilityVSEase of repair

Solution Approach 1:

The mounting system is segmented into separable components: the division protrusion, through-holes, assembly holes, and screws. This segmentation allows the room lamp plate to be easily separated from the head liner by removing the screws, enabling maintenance and replacement while maintaining reliable attachment during normal operation.

Inventive Principle:

Principle #1Segmentation

4Reliability

If adhesive is used to mount the room lamp plate on the head liner, then the room lamp plate can be attached to the head liner, but the aesthetic aspect of the vehicle interior is degraded

Engineering Contradiction:

Improveattachment reliabilityVSAvoidaesthetic appearance

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12036920B2Room lamp for vehicle assembled without using adhesive

Publication Date: 2024.07.16 DAEHAN SOLUTION

AI summary

A room lamp for a vehicle capable of being assembled without using an adhesive and provides a room lamp for a vehicle, which is fastened and assembled using a screw in a state in which an assembly hole formed in a room lamp plate is overlappingly placed on a through-hole formed in a head liner and a division protrusion formed in the room lamp is assembled to sequentially pass through the through-hole and the assembly hole, so that the room lamp can be easily and conveniently assembled or disassembled without using an adhesive and can be easily and conveniently assembled at a predetermined position as the division protrusion functions as a pin.