Eccentric Lever Door Edge Protection Profile
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Solution Overview
Problem
Existing door edge protection devices for motor vehicles are limited in their ability to effectively protect the curved door edge due to their complex and space-consuming designs, which restrict their ability to cover the entire edge, especially at sharp corners, and often fail to securely grip the edge during pivoting movements.
Innovation Solution
The use of an eccentric lever mounted rotatably in the door allows the door edge protection profile to move translationally and pivotally, adapting to the door edge's contour while minimizing space requirements, enabling comprehensive edge protection with a predominantly translational movement and a pivoting range of at least 180°, facilitated by double guidance points aligned parallel to the door's longitudinal direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the edge protection body executes a 180° rotation about an axis parallel to the door edge, then the device can be simple in structure, but it cannot cover the entire curved door edge effectively
Solution Approach 1:
The edge protection body transitions from a static rotation axis to a dynamic path following the door edge contour. The body moves along a predetermined path that adapts to the curved geometry of the door edge, enabling comprehensive coverage while maintaining structural simplicity through the guide mechanism.
Solution Approach 2:
A guide mechanism acts as an intermediary between the rotation axis and the edge protection body. This guide constrains the movement along a predetermined path that matches the door edge contour, allowing the protection body to follow the curved geometry without requiring a complex articulated structure.
2Device complexity
If intermediate levers with linear drives are used to pivot the edge protection profile, then the structure can be simple, but the pivoting movement is limited to less than 180° and cannot cover sharp corners
Solution Approach 1:
The system transitions from limited linear pivoting to extended rotational coverage. The guide mechanism enables the edge protection body to traverse beyond 180° by following a predetermined path that accommodates the full contour of the door edge, including sharp corners and curved sections.
Solution Approach 2:
The guide mechanism serves as an intermediary that translates limited linear drive movement into extended rotational coverage. By constraining the protection body to a predetermined path, the guide enables the system to achieve comprehensive edge coverage including sharp corners while maintaining a relatively simple linear drive mechanism.
3Length of moving object
If push rods press on eccentric levers to extend the protection profile, then the profile can reach the end position, but the kinematic arrangement does not allow clear course of movement and secure gripping
Solution Approach 1:
The guide mechanism acts as an intermediary that provides clear kinematic constraints between the push rod actuation and the protection profile movement. By defining a predetermined path, the guide ensures that the protection body follows a precise trajectory, achieving both full extension and reliable door edge gripping through controlled motion.
Solution Approach 2:
The system transitions from ambiguous intermediate positions to well-defined dynamic states. The predetermined path created by the guide mechanism ensures that at every point during extension, the protection body has a specific orientation and position, enabling secure gripping of the door edge throughout the movement range.
4Area of stationary object
If the edge protection profile is designed to cover the entire door edge contour, then protection is comprehensive, but the device requires more installation space
Solution Approach 1:
The edge protection body transitions from requiring large static installation space to achieving comprehensive coverage through dynamic movement. By following a predetermined path guided by the guide mechanism, the protection body can cover the entire door edge contour while maintaining a compact retracted position that requires minimal installation space.
Solution Approach 2:
The system utilizes the movement dimension provided by the guide mechanism to achieve comprehensive coverage. Instead of requiring a large protection body that occupies space, the solution uses a guided movement path that allows a more compact protection body to traverse the entire door edge contour, effectively using spatial dimensionality to resolve the contradiction.
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
This solution provides enhanced protection for a larger area of the door edge with reduced installation space, ensuring secure gripping and efficient movement into protective positions, even at sharp corners, while maintaining a compact design and minimizing travel distance during extension.
Implementation Method 1
door edge protection profile (5) is driven by an eccentric lever (7) mounted rotatably in the door (1)
Implementation Method 2
the door edge protection profile (5) can move essentially in a fixed spatial direction and predominantly translationally on a predetermined path
Implementation Method 3
Due to the pivot bearing of the eccentric lever in the door, the aforementioned forward-backward movement thus automatically results on the other side of the eccentric lever when this side drives the door edge protection profile
Implementation Method 4
The movement, which is essentially fixed in spatial direction and predominantly translatory, results from the double guidance of the door edge protection in the door at the two points lying one behind the other in the longitudinal direction of the door
Data Source
Figure 1a~1d
Figure 2~4
Figure 5a~5d
AI summary
The device has a door edge protection profile (5) guided movably at two points opposite to a motor vehicle door i.e. side door, where the points lie in a row in a longitudinal direction of the door. The door edge protection profile is driven by eccentric levers (7a, 7b) that are supported in the door in a rotatable manner. The door edge protection profile is guided on the door by the eccentric levers. The eccentric levers implement a rotary movement between 250 and 290 degrees. A drive acts on an eccentric axle of the eccentric levers.