Triangular Lamp Linkage for Thermal Cut-Off Line Stability

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Solution Overview

Problem

Existing headlamp systems suffer from cut-off line drift due to material type, component placement, and temperature conditions, making them complex to install and control effectively.

Innovation Solution

A device with a triangularly shaped connecting means featuring three joints and conjunction units that allow relative movement between the adjustment unit and the carrier frame, compensating for cut-off line drift through automatic adjustments without the need for buttons or actuators, using ball joints for flexibility and telescopic extension means for effective compensation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If spring-loaded ball joints or spring loaded screws are used to address thermal issues, then temperature-related light drift is compensated, but the system becomes complex to install and control

Engineering Contradiction:
Improvetemperature compensationVSAvoidinstallation and control complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The triangular connecting means automatically compensates for thermal expansion and cut-off line drift through its geometric structure and joint mechanisms, without requiring external control systems or complex installation procedures. The system self-adjusts based on temperature changes, eliminating the need for buttons or actuators.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The connecting means incorporates movable joints that allow dynamic adjustment of the lighting unit position relative to the carrier frame. This dynamic structure adapts to thermal expansion automatically, providing reliable temperature compensation while maintaining simple installation and control.

Inventive Principle:
Principle #15Dynamics

2Reliability

If triangularly shaped connecting means with three joints and conjunction units are used, then cut-off line drift is drastically reduced and component movements are compensated, but the number of connecting elements increases

Engineering Contradiction:
Improvecut-off line stabilityVSAvoidnumber of connecting elements
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The connecting means is divided into three conjunction units connected by three joints, forming a triangular structure. This segmentation allows each unit to independently accommodate thermal expansion and movement, providing superior cut-off line stability while keeping the overall structure manageable and relatively simple.

Inventive Principle:
Principle #1Segmentation

3Ease of operation

If automatic compensation without buttons or actuators is implemented, then control complexity is reduced, but the mechanism requires precise geometric design

Engineering Contradiction:
Improvecontrol simplicityVSAvoidgeometric design precision
Core Design Contradiction:
Ease of operationVSManufacturing precision

Solution Approach 1:

The system achieves automatic compensation through its geometric design, eliminating the need for buttons or actuators. The triangular connecting means with its three joints and conjunction units self-adjusts to compensate for thermal expansion and cut-off line drift, providing ease of operation while requiring precise manufacturing of the geometric structure.

Inventive Principle:
Principle #25Self-service

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 solution drastically reduces cut-off line drift by compensating for component movements and thermal deflections, maintaining consistent lighting settings and reducing the complexity of installation and control, while minimizing the number of required connecting elements.

Implementation Method 1

cut-off line drifts may result from and/or depend on the type of material used in the headlamp, a placement of components in and/or at the headlamp, and in particular temperature conditions in and/or at the headlamp

Methodology Applied
Scientific EffectThermal expansion: Thermal Expansion

Data Source

PatentUS12134343B2Device for compensating cut-off line drift of a lamp, lamp comprising the device and vehicle comprising the lamp
Publication Date: 2024.11.05 HELLA GMBH & CO KGAA
  • US12134343B2 patent drawing
  • US12134343B2 patent drawing
  • US12134343B2 patent drawing

AI summary

A device is provided for compensating cut-off line drift of a lamp in a vehicle. An adjustment unit adjusts the lighting direction of the lamp. A carrier frame carries a lighting unit of the lamp. A triangularly shaped connecting means mechanically connects the adjustment unit with the carrier frame. The connecting means includes a first joint at a first corner of the connecting means, a second joint at a second corner of the connecting means, a third joint at a third corner of the connecting means, a first conjunction unit connected between the first joint and the second joint, a second conjunction unit connected between the first joint and the third joint, and a third conjunction unit connected between the second joint and the third joint. The joints move the conjunction units relative to each other for compensating the cut-off line drift.