In-Vehicle Door Latch Structure Floor Panel Bending
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The bending of hollow plate floor panels in vehicles due to passenger weight leads to abnormal noise and reduced sealing performance, and increasing panel thickness to mitigate this results in increased weight, which existing latch structures do not address.
Innovation Solution
A latch structure that latches the door onto the floor panel, distributing the load to the door and restraining the floor panel's movement, with a floor-side engaging portion and door-side engaging portion that include a fixing member and a movable member to reduce interference and maintain sealing, and a discharge hole to prevent foreign matter accumulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the thickness of the floor panel is increased to reduce bending, then the bending resistance is improved, but the weight of the floor panel increases
Solution Approach 1:
The floor panel is divided into multiple sections with reinforcing ribs that create hollow chambers, segmenting the structure to enhance bending resistance without requiring a uniform increase in thickness throughout the entire panel
Solution Approach 2:
The floor panel uses a composite structure combining hollow plate material with integrated reinforcing ribs and latch mechanisms, creating a multi-component system that achieves high strength-to-weight ratio by distributing structural functions across different elements
2Weight of moving object
If the floor panel is made thinner to reduce weight, then the weight is reduced, but the bending resistance deteriorates
Solution Approach 1:
The floor panel is divided into multiple sections with reinforcing ribs that create hollow chambers, segmenting the structure to enhance bending resistance without requiring a uniform increase in thickness throughout the entire panel
Solution Approach 2:
Reinforcing ribs are added in the vertical dimension to create a three-dimensional hollow structure, transforming the panel from a two-dimensional flat surface to a three-dimensional form that provides enhanced structural rigidity and bending resistance while maintaining thin overall thickness
3Strength
If a latch structure is added to reduce floor panel bending, then the bending resistance is improved, but the device complexity increases
Solution Approach 1:
The latch structure merges multiple functions into a single integrated assembly: the latch member provides both the latching function and acts as a reinforcement element, while the engaging portions serve both to secure the door and to provide structural support to the floor panel, reducing overall device complexity through functional integration
Solution Approach 2:
The latch structure is designed with multi-functionality where the latch member serves as both a door securing mechanism and a structural reinforcement element for the floor panel, and the engaging portions provide both door latching and structural support functions, allowing a single component to fulfill multiple roles
Data Source
AI summary
A latch structure includes: a door that is changeable between a closed state in which the door covers a door opening provided on a peripheral wall of a vehicle and an opened state in which the door opens the door opening; a floor panel that constitutes a floor surface of an interior space; a door-side engaging portion mounted on the door; and a floor-side engaging portion mounted on the floor panel and engageable with the door-side engaging portion when the door is in the closed state.