Window Regulator Drum Housing Vertical Positioning
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Solution Overview
Problem
The existing window regulator design increases the vertical dimension required for the window glass travel due to the arrangement of the motor and housing at the lower end of the guide rail, necessitating a larger space for the window glass to operate effectively.
Innovation Solution
The window regulator incorporates a drum housing with a contact surface positioned lower than the upper end of the wall section in the vertical direction, allowing the motor and drum to be positioned higher, thereby reducing the overall vertical dimension of the window regulator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the motor and housing are arranged at the lower end of the guide rail, then the structural stability is improved, but the vertical dimension of the window regulator is increased
Solution Approach 1:
The patent repositions the contact surface of the drum housing from a higher location to a lower position on the drum housing structure. This dimensional rearrangement allows the motor and drum to be positioned higher within the housing, effectively reducing the overall vertical dimension of the window regulator while preserving the lower-end mounting configuration's structural stability
2Reliability
If the contact surface is positioned at the upper end of the wall section, then the carrier plate engagement is improved, but the vertical dimension is increased
Solution Approach 1:
The contact surface is deliberately positioned at a lower location on the drum housing, below the upper end of the wall section. This lower-positioned contact surface maintains reliable engagement with the carrier plate while allowing the motor and drum to occupy higher space within the housing, thereby reducing the overall vertical dimension required by the window regulator assembly
Data Source
AI summary
A window regulator includes a guide rail provided along an ascending/descending direction of a window glass of a vehicle, a carrier plate that slides on the guide rail and travels together with the window glass, cables that pull the carrier plate, a drum on which the cables are partially wound, a motor rotationally driving the drum, and a drum housing provided at a lower end of the guide rail and having a housing space for housing the drum, wherein the drum housing has a wall section provided on an outer side of the drum that is housed in the housing space, and a contact surface of the drum housing coming into contact with the carrier plate is provided at a lower position than an upper end of the wall section in a vertical direction that the window glass travels when the window glass is fully opened.