Run Channel Plate Protrusion Seal Pressure
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Solution Overview
Problem
The die-molded corner parts of vehicle window run channels, formed by injection molding or compression molding, struggle to achieve sufficient seal pressure due to the inability to form return lips or reinforcing ribs, leading to potential sound and water leaks, and existing reinforcing ribs either apply too much pressure or have unstable bending, hindering smooth window movement.
Innovation Solution
A long run channel made of elastic polymer material with die-molded corner parts featuring a U-shape and plate-shaped protrusions on the interior side wall that obliquely protrude to increase seal pressure while maintaining stability, ensuring the window can move smoothly upward and downward.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional die molding is used for corner parts, then manufacturing ease is improved, but seal pressure is insufficient leading to sound and water leaks
Solution Approach 1:
The patent applies local quality by providing reinforcing ribs only at specific locations where needed - on the interior side wall part and exterior side wall part of the corner portion. This localized reinforcement increases seal pressure at critical areas without requiring overall structural changes to the entire run channel, thus maintaining manufacturing ease while improving sealability at problem areas.
2Reliability
If reinforcing ribs are added to die-molded corner parts, then seal pressure is increased, but device complexity increases
Solution Approach 1:
The patent merges the reinforcing rib structure with the existing corner portion geometry. The reinforcing ribs are integrated into the corner portion as a unified structure that can be molded in one piece with the side wall parts. This combining approach increases seal pressure through the rib structures without significantly increasing device complexity, as the ribs are formed as part of the standard die molding process rather than as separate components.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively increases seal pressure in die-molded corner parts, enhancing sealability and waterproof performance by stabilizing the bending direction of the protrusions, preventing water leaks and ensuring smooth window operation.
Implementation Method 1
a long run channel made of an elastic polymer material
Data Source
AI summary
An interior side wall part of a rear die-molded corner part of a run channel is provided with a plate-shaped protrusion abutting on an interior seal lip at the time of upward and downward movement of a window pane, the protrusion extending in a direction from a base end side toward a distal end side of the interior side wall part along a wall surface of the interior side wall part. Accordingly, a force by which the interior seal lip presses the window pane to a vehicle exterior can be increased to increase a seal pressure. Also, the protrusion is formed so as to protrude obliquely from the wall surface of the interior side wall part.