Window Regulator Arm Layout to Prevent Overlap Deformation

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Solution Overview

Problem

Existing window regulators apply a large force to arm members, particularly when the main arm and sub-arm overlap, leading to deformation and structural issues.

Innovation Solution

A window regulator design with shifted rotation center shafts for the first and second arms, preventing overlap and minimizing force application by optimizing arm positioning and support structures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the main arm and sub-arm are rotated in the conventional window regulator design, then the window glass can be lifted and lowered, but a large force is applied to the arm members causing deformation

Engineering Contradiction:

Improvewindow glass lifting and loweringVSAvoidarm member structural integrity

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The patent applies asymmetry by shifting the rotation center shafts of the first and second arms relative to each other in the drive direction. This asymmetric positioning prevents the arms from overlapping during operation, eliminating the large forces that cause deformation while maintaining the window glass lifting function

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent introduces a positional offset in the drive direction (another dimension) between the rotation center shafts of the two arms. This dimensional change in shaft positioning prevents arm overlap and reduces deformation forces while preserving the mechanical linkage function for window operation

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Device complexity

If the rotation center shafts of the first and second arms are aligned, then the structure is simplified, but the arms overlap causing large forces and deformation

Engineering Contradiction:

Improverotation shaft positioningVSAvoidarm member structural integrity

Core Design Contradiction:

Device complexityVSStrength

Solution Approach 1:

The patent deliberately introduces asymmetry in the rotation shaft positioning by shifting them in the drive direction. This asymmetric arrangement prevents arm overlap and deformation, demonstrating that increased positioning complexity in shaft alignment is necessary to maintain arm structural integrity

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent converts the potential harm of complex shaft positioning into a benefit by using the positional offset to prevent arm overlap. The shifted rotation center shafts transform what could be seen as increased complexity into a solution that protects arm members from deformation forces

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Data Source

PatentUS20250314115A1Window regulator

Publication Date: 2025.10.09 AISIN CORP

AI summary

A window regulator includes a bracket on which window glass is to be supported, a first arm with one end rotatably supported by vehicle member constituting door and the other end rotatably supported by bracket, a second arm with one end rotatably supported by the vehicle member and the other end rotatably supported by the bracket, and a drive member configured to drive the bracket, on which window glass is supported, by rotationally driving the first and second arms. A rotation center shaft of one end of first arm and a rotation center shaft of one end of second arm are shifted in drive direction of bracket on which window glass is to be supported. A rotation center shaft of other end of first arm and a rotation center shaft of other end of second arm are shifted in drive direction of bracket on which window glass is supported.