Window Regulator Cable Routing for Noise Suppression
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Solution Overview
Problem
Window regulators experience noise issues due to vibration of the lowering-side cable when the carrier plate moves up, as the cable is disposed outside the guide rail, leading to increased vibration and noise.
Innovation Solution
The lowering-side cable is positioned on or above the guide rail, allowing it to easily slide and reducing vibration, while the raising-side cable is positioned outside the guide rail, and a cable hooking member is used to wind the cable, allowing for weight reduction of the guide rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of stationary object
If the guide rail width is reduced for weight reduction, then the weight of the guide rail is reduced, but the lowering-side cable is disposed outside the guide rail causing vibration and noise
Solution Approach 1:
The patent changes the spatial arrangement of the lowering-side cable from a lateral position (outside the guide rail) to a vertical position (on or above the guide rail). This dimensional change allows the cable to be positioned within the horizontal footprint of the guide rail, enabling the guide rail width to be reduced for weight reduction while keeping the cable stable and in contact with the guide rail surface, thereby suppressing vibration and noise.
2Ease of operation
If the lowering-side cable is disposed outside the guide rail, then the cable has more space, but the cable vibrates easily when external vibration is applied
Solution Approach 1:
The guide rail serves as an intermediary element between the lowering-side cable and the external environment. By positioning the cable on or above the guide rail, the guide rail provides a stable support surface that dampens external vibrations, preventing the cable from vibrating freely while still allowing sufficient movement space for cable operation.
3Object-generated harmful factors
If the lowering-side cable is positioned on or above the guide rail, then vibration and noise are suppressed, but the cable must be routed through the guide rail width region
Solution Approach 1:
The patent merges the cable routing path with the guide rail structure by positioning the lowering-side cable on or above the guide rail. This integration allows the cable to follow the guide rail's vertical extent, simplifying the overall routing arrangement while maintaining vibration suppression benefits.
Data Source
AI summary
This window regulator 1 is provided with a guide rail 31, a carrier plate 32, an ascending-side cable 33, and a descending-side cable 34. The carrier plate 32 has an ascending-side end holder 79 that houses an end 33a of the ascending-side cable 33, and a descending-side end holder 71 that houses an end 34a of the descending-side cable 34. The ascending-side end holder 79 is provided such that the ascending-side cable 33 is outside the guide rail 31. The descending-side end holder 81 is provided such that the descending-side cable 34 is on the guide rail 31. When the carrier plate 32 ascends and descends, the carrier plate 32 ascends and descends along the edges of the guide rail 31. Therefore, in the window regulator, abnormal noise can be suppressed.