Door Weather Strip Corner Reinforcement
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Solution Overview
Problem
Conventional door weather strips for motor vehicles face challenges in securely attaching and sealing at corners, requiring complex cutting and insertion processes, which are time-consuming and labor-intensive.
Innovation Solution
A door weather strip design featuring extruded upper and vertical side sections and molded corner sections, with a reinforcing rib and sponge material for enhanced flexibility and strength, allowing for efficient production and secure attachment without complex processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the door weather strip uses a solid material for the exterior base portion and sponge material for the seal lip in corner sections, then the sealing properties are improved, but the manufacturing process becomes complex and time-consuming
Solution Approach 1:
The door weather strip is divided into multiple sections (exterior base portion, seal lip, interior base portion) that can be manufactured separately using different materials and then joined together. This allows each section to be optimized for its specific function while maintaining overall reliability.
Solution Approach 2:
The patent uses composite construction by combining solid material for the exterior base portion and sponge material for the seal lip in corner sections. This composite approach allows the rigid solid material to provide structural support while the flexible sponge material ensures proper sealing contact.
2Adaptability or versatility
If the door weather strip is attached to a door frame with decreased exterior vertical wall width for hidden type doors, then the vehicle design requirements are met, but the attachment security and sealing effectiveness are reduced
Solution Approach 1:
The patent extends the weather strip attachment from a two-dimensional surface mount to a three-dimensional configuration that wraps around corner sections. This dimensional transition allows the weather strip to utilize the depth and curvature of corner regions, providing additional attachment surface area and security despite the reduced exterior vertical wall width.
Solution Approach 2:
The corner sections are designed with curved geometries that allow the weather strip to conform to the door frame contours. This curvature enables the seal lip to maintain continuous contact with the door opening portion around corners, improving both attachment security and sealing effectiveness in constrained spaces.
3Reliability
If conventional door weather strips use separate exterior and interior weather strips with complex cutting and insertion processes, then the sealing coverage is improved, but the production time and labor are increased
Solution Approach 1:
The patent integrates the exterior base portion, seal lip, and interior base portion into a single continuous door weather strip structure. This merging eliminates the need for separate cutting and insertion operations required by conventional separate weather strips, significantly reducing production time and labor while maintaining comprehensive sealing coverage.
Solution Approach 2:
The door weather strip is pre-formed as a single integrated component with all necessary sections (exterior base, seal lip, interior base) already in their final configurations. This preliminary formation eliminates on-site cutting and assembly operations, streamlining the installation process and improving production efficiency.
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 design provides a secure, efficient, and aesthetically improved seal around the vehicle door perimeter, reducing the risk of the weather strip coming off and enhancing the vehicle's appearance and weight reduction.
Implementation Method 1
a corner section adapted to join the upper side section and the vertical side section to each other by molding
Implementation Method 2
an upper side section formed by extrusion and adapted to be attached to an upper side of the door frame, a vertical side section formed by extrusion and adapted to be attached to a vertical side of the door frame
Data Source
AI summary
A door weather strip for a motor vehicle, which can be readily produced, and readily and securely attached to a corner of a door frame without coming off the same. In an upper side section and an upper side part of a corner section of the door weather strip, the door weather strip includes an exterior weather strip, an interior weather strip and a connecting section. The exterior weather strip includes an exterior base portion for attachment to the door frame or a door molding, and an exterior seal portion for contacting a door opening portion of a vehicle body when a door is closed, and the interior weather strip includes an interior base portion and an interior seal portion. A reinforcing rib is formed in a rear surface of the exterior base portion in the upper side part of the corner section.