Doorframe Molding Mounting Structure With Elastic Deformation Clip
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Solution Overview
Problem
Existing doorframe molding mounting structures do not allow for easy attachment and detachment without damaging the components, as the engaging claw for temporary fixation cannot be contracted once it is inside the vehicle body, making removal difficult.
Innovation Solution
A mounting structure for doorframe molding that includes an upper edge part with a shaft and rib, a body part extending along the window frame, and a bracket with a cut-out part, allowing the shaft to be inserted and the peripheral part to engage with the rib, enabling easy temporary fixation and removal without damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the engaging claw for temporary fixation is designed to be contracted after passing through the hole, then the molding can be permanently fixed to the vehicle body, but the structure becomes more complex and difficult to manufacture
Solution Approach 1:
The clip is divided into two separate components: an engaging claw for temporary fixation and an engaging claw for permanent fixation. This segmentation allows each claw to have its own simple structure optimized for its specific function, avoiding the complexity of a single integrated claw with contraction mechanisms.
Solution Approach 2:
The contraction function is extracted from the permanent fixation claw and transferred to the temporary fixation claw. The temporary fixation claw includes a pair of engaging parts that can be pressed towards the center axis side and deform elastically, providing the contraction mechanism only where needed for temporary holding.
2Device complexity
If the engaging claw for temporary fixation cannot be contracted once inside the vehicle body, then the structure remains simple, but the molding cannot be removed without breaking the engaging part
Solution Approach 1:
By separating the temporary and permanent fixation functions into distinct claws, the temporary fixation claw can be designed with elastic deformation capability while the permanent fixation claw remains simple and rigid. This allows the molding to be easily removed from temporary fixation by simply pulling, without needing to break any parts.
Solution Approach 2:
The temporary fixation claw utilizes elastic deformation as a key parameter change mechanism. The pair of engaging parts can be pressed towards the center axis side and deform elastically, allowing the claw to contract and expand. This enables the molding to be temporarily held securely yet removed easily by overcoming the elastic force, rather than breaking the engaging part.
3Reliability
If a pair of engaging parts are pressed towards the center axis side and deformed elastically to contract the engaging claw, then the molding is temporarily fixed securely, but the manufacturing precision requirements increase
Solution Approach 1:
The engaging parts are designed to utilize elastic deformation as a controlled parameter change. By selecting appropriate materials and dimensions, the elastic deformation can occur within predictable ranges, allowing for standard manufacturing tolerances. The pair of engaging parts can be pressed towards the center axis side and deform elastically to contract the claw, providing secure temporary fixation without requiring ultra-precise manufacturing.
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
Enables easy attachment and detachment of the doorframe molding without damaging the components, providing a secure temporary fix and preventing falling, while maintaining a tight seal to prevent foreign matter entry.
Implementation Method 1
The pair of engaging parts can be pressed towards the center axis side of the clip and deform elastically. When the engaging claw for temporary fixation passes through the hole, the pair of engaging parts abut on an inner peripheral surface of the hole, are pressed towards the center axis side of the clip, and deformed elastically. This means that the engaging claw for temporary fixation is contracted.
Data Source
AI summary
A mounting structure for a doorframe molding includes an upper edge part that defines an upper side of a window frame of a vehicle door. The mounting structure further includes an engaging part that includes a shaft part and a rib part extending from a lower end of the shaft part in a vehicle front-rear direction or a vehicle width direction, a body part of the doorframe molding, and a bracket that projects from the body part and is engaged with the engaging part. The bracket has a cut-out part that is made by cutting out the bracket. The shaft part is inserted into the cut-out part, and a peripheral part of the cut-out part is engaged with the rib part.