Door Edge Protector Cam Mechanism Adaptability
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Solution Overview
Problem
Existing door edge protector devices are difficult to apply to different vehicle types due to the need for significant design changes in the link mechanism and lever to accommodate varying door thickness and shapes.
Innovation Solution
A door edge protector device featuring a cam member with adjustable cam portions that allows the protector to move along a customizable locus, enabling adaptation to different vehicle types by changing the cam member without altering the link mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the link mechanism and lever shapes are changed to accommodate different vehicle door types, then the protector can be adapted to different vehicle types, but the device complexity and design changes increase significantly
Solution Approach 1:
The invention separates the cam member from the link mechanism, allowing the cam member to be independently adjusted or replaced. This segmentation enables modification of only the cam member shape to adapt to different vehicle door types, while the link mechanism remains unchanged, thereby reducing overall device complexity while maintaining adaptability.
Solution Approach 2:
The invention changes the shape parameter of the cam member to adjust the movement locus of the protector. By modifying the cam member's geometric parameters rather than the entire link mechanism, the system achieves adaptability to different vehicle door types with minimal design changes, resolving the contradiction between versatility and complexity.
2Adaptability or versatility
If the cam member shape is changed to adjust the protector movement locus, then the protector can be adapted to different door thickness and shapes, but the manufacturing complexity of the cam member increases
Solution Approach 1:
The cam member is designed as a universal component that can serve multiple vehicle door types through shape variation. By concentrating the adaptation function in a single replaceable cam member rather than redesigning the entire mechanism, the invention maintains ease of manufacture for the base structure while enabling versatility through standardized cam member production in different shapes.
3Device complexity
If a fixed link mechanism is used, then the device structure is simplified, but the protector cannot adapt to different vehicle door configurations
Solution Approach 1:
The cam member acts as an intermediary between the fixed link mechanism and the protector. It translates the simple rotational input into the complex movement locus required for different door configurations. This intermediary approach allows the link mechanism to remain simple and fixed while the cam member handles the adaptation to various door types.
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 application to various vehicle types with different door thickness and shapes by modifying the cam member, ensuring reliable protection of the door edge during opening and closing without requiring extensive design changes to the link mechanism.
Implementation Method 1
a cam member formed with a cam portion and configured to be rotated by an input corresponding to an close/open state of the vehicle door; and a link mechanism holding the protector, provided with a cam follower engaged with the cam portion, and configured to operate by interlocking with rotation of the cam member by engagement between the cam portion and the cam follower
Data Source
AI summary
A door edge protector device includes a protector, a cam member and a link mechanism. Cam portions are formed in the cam member, and the cam member is rotated by an input corresponding to a close/open state of a door. The link mechanism includes cam followers which are engaged with the cam portions, and the protector is attached to the link mechanism. By the engagement between the cam portions and the cam followers, the link mechanism moves in an interlocking manner with rotation of the cam member. A locus T includes an accommodated position corresponding to the close state of the door and a set position covering a door edge corresponding to the close state of the door. The cam portions are configured so that the protector moves along the locus by movement of the link mechanism.