Vehicle Door Curtain Hook Assembly for Uniform Panel Fastening
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Solution Overview
Problem
The existing hook assembly for vehicle door curtains experiences non-uniform fastening forces due to variations in door panel hole sizes and thickness, leading to difficulty in assembly and potential separation or damage during use.
Innovation Solution
A hook assembly design that includes a hook body with a fastening part and a hook pin, where the hook pin is hinge-connected to the hook body, allowing complete insertion and locking to the door panel's through hole, with a fixing wing part and lever mechanism to absorb size dispersion and ensure constant fastening force.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the hook assembly uses a fixed fastening structure, then the assembly is simple, but the fastening force is non-uniform due to hole size and thickness variations
Solution Approach 1:
The hook pin is designed with a movable grip part that can rotate relative to the base, transforming a static fastening structure into a dynamic one. This allows the grip part to automatically adjust its position and orientation based on the actual through-hole dimensions and door panel thickness, ensuring uniform fastening force while maintaining structural simplicity
Solution Approach 2:
The grip part is designed to change its orientation parameter (rotation angle) based on the through-hole parameters (size and thickness). By allowing the grip part to rotate within a specific angle range, the system adapts to parameter variations in the door panel and through-hole, achieving reliable fastening without increasing structural complexity
2Force
If the hook body is fastened upward to open the grip part, then the fastening force is sufficient, but the assembling is difficult
Solution Approach 1:
Instead of fastening the hook body upward to open the grip part, the invention inverts the sequence: the hook pin is first inserted through the door panel and hook body in a downward motion, and then the grip part automatically opens during insertion. This inversion simplifies the assembly operation while maintaining sufficient fastening force through the coupling between the fastening part and grip part
3Reliability
If the fastening force is increased to prevent separation, then the connection is secure, but the hook assembly may be damaged when the door curtain is wound
Solution Approach 1:
The movable grip part that can rotate relative to the base allows the fastening mechanism to dynamically adjust to load conditions. During door curtain winding, the grip part can rotate to accommodate the opposing forces between fastening force and curtain load, preventing excessive stress concentration that would lead to damage while maintaining secure connection
Data Source
AI summary
An embodiment hook assembly for a door curtain to be installed on a door panel of a vehicle, the hook assembly includes a hook body installed to penetrate a through hole formed in the door panel, and a hook pin having an upper end hinge-connected to an upper portion of the hook body, wherein in a state in which an upper portion of the hook pin is completely inserted into the hook body, a part of the hook body is in an opened state and the hook body is locked to a circumference of the through hole such that the hook body is fastened to the through hole.