Magnetic Window Glass Control Layout for Split Cab Door Windows
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Solution Overview
Problem
In heavy-duty vehicles, the installation of a lower window to improve the driver's view obstructs the space needed for a conventional window winding mechanism, preventing the up and down displacement of the upper door window.
Innovation Solution
A compact window control device is designed to control the up and down displacement of the upper window glass, primarily extending in the left and right areas around the glass, avoiding the intermediate space between the upper and lower windows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a lower window is installed in the cab door to improve driver's view, then the driver's view of external surrounding areas is improved, but the space available for installing a conventional window winding mechanism is reduced
Solution Approach 1:
The window control device transitions from a conventional vertical arrangement to a horizontal arrangement, extending primarily in the left and right directions rather than vertically between the upper and lower windows. This dimensional change allows the mechanism to fit within the available horizontal space in the cab door while maintaining full functionality for controlling the upper window glass displacement.
2Ease of operation
If a conventional window winding mechanism is installed in the upper-half of the cab door, then the upper window glass can be displaced up and down, but the installation of a lower window becomes obstructed
Solution Approach 1:
The control device is reconfigured to extend horizontally in the left and right areas surrounding the upper window glass rather than vertically. This allows the lower window to be installed in the lower half of the cab door without obstructing the winding mechanism, while the horizontal extension maintains sufficient space for the mechanism to operate and control upper window glass displacement.
3Device complexity
If the window control device extends in the intermediate areas between upper and lower window glasses, then the mechanism may be simpler to implement, but it obstructs the installation of a lower window
Solution Approach 1:
The control device employs an asymmetric layout where the horizontal extension in the left and right areas provides sufficient space for mechanism implementation without requiring vertical extension into the intermediate areas. This asymmetric horizontal arrangement resolves the contradiction by maintaining mechanism functionality while clearing the path for lower window installation.
Data Source
AI summary
A window control device for controlling the up and down displacement of a window glass comprising first and second permanent magnet strips attached to window glass, window frame surrounding at least partially the window glass and provided with first and second sets of electromagnets, control system for controlling polarity of the electromagnets and intensity of the magnetic field generated by the first and second sets of electromagnets so that, in locked state, first set of electromagnets adapt to attract the first permanent magnet strip, thus preventing up and down displacement of the window glass, and, in released state of window glass, first set of electromagnets adapt to repel first permanent magnet strip, thus allowing up and down displacement of window glass, and the second set of electromagnets adapt to generate selectively repulsive and/or attractive force on second permanent magnet strip, thus resulting in up or down displacement of window glass.