Window Regulator Stopper Relocation for Guide Rail Downsizing
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Solution Overview
Problem
The existing window regulators face challenges in downsizing due to the requirement for space to accommodate the stopper on the guide rail, which limits the reduction of the guide rail's longitudinal dimension.
Innovation Solution
The window regulator design includes a stopper positioned alongside the guide rail in the front-back direction, allowing the guide rail to be reduced in length without compromising functionality, with the stopper and guide rail arranged non-overlappingly in the width direction, enabling a smaller longitudinal dimension.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the guide rail width is reduced to save weight, then the weight and dimensions are reduced, but the longitudinal dimension of the guide rail cannot be significantly reduced since space is needed for arranging the stopper thereon
Solution Approach 1:
The stopper is relocated from a longitudinal arrangement on the guide rail to a lateral arrangement beside the guide rail in the width direction. This dimensional repositioning allows the stopper to be positioned at a location that does not overlap with the guide rail's longitudinal space, thereby enabling reduction of the guide rail's longitudinal dimension while maintaining weight-saving benefits
2Volume of moving object
If the guide rail longitudinal dimension is reduced for downsizing, then the window regulator size is reduced, but the stopper cannot be properly arranged on the guide rail
Solution Approach 1:
The stopper is positioned beside the guide rail in the width direction rather than on the guide rail in the longitudinal direction. This spatial reconfiguration enables both the guide rail and stopper to coexist in a compact arrangement, achieving downsizing of the window regulator while maintaining proper stopper arrangement and functionality
Data Source
AI summary
A window regulator includes a guide rail provided on a door of a vehicle and arranged along an ascending/descending direction of a window on the door, a carrier plate that slides on the guide rail and moves together with the window, a drive unit including a drum rotationally driven by a motor, cables coupled to the carrier plate at one end and coupled to the drum at an other end, and a stopper that contacts with a contact portion of the carrier plate at a position where the carrier plate is located when the window is fully closed. The stopper and the guide rail are placed side by side in a front-back direction of the vehicle.