Car Door Opening Mechanism with Nested Coupling for Two-Stage Safety
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Solution Overview
Problem
Current car door mechanisms do not prevent unexpected opening, leading to accidents involving motorcycle riders and fail to ensure a two-stage opening operation, which is not commonly practiced by drivers and passengers.
Innovation Solution
A car door opening mechanism that uses a coupling arrangement between a first coupling member and a connection structure to constrain the car door at a non-fully opened position, requiring a second operation to fully open the door, thereby preventing unexpected full opening and potential child ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a car door is equipped with a mechanism to constrain opening angle, then safety is improved by preventing unexpected full opening, but device complexity increases due to additional coupling members and connection structures
Solution Approach 1:
The connection structure is integrated within the door opening mechanism, with the first coupling member nested within the connection structure. The coupling member fits inside the connection structure's receiving space, creating a compact nested arrangement that prevents unexpected full door opening while maintaining reasonable device complexity
Solution Approach 2:
The door opening mechanism is segmented into distinct functional components: the connection structure with its receiving space, the first coupling member for initial coupling, and the second coupling member for subsequent coupling. This segmentation allows each component to perform its specific function independently, improving reliability while keeping the overall structure manageable
2Reliability
If a two-stage opening operation is implemented, then safety is improved by preventing child ejection and collisions, but ease of operation deteriorates as users must perform additional operations
Solution Approach 1:
The mechanism performs preliminary actions automatically: first the first coupling member couples to constrain the door at a first angle, then the second coupling member couples to constrain at a second angle. This preliminary constraining action happens automatically during the opening process, ensuring safety without requiring users to manually perform multiple steps
Solution Approach 2:
The door opening mechanism transitions from a static single-angle opening to a dynamic two-stage opening process. The door can open to different angles depending on the coupling state: fully open when both coupling members are disengaged, partially open when first coupling member is engaged, and constrained when second coupling member is engaged. This dynamic behavior provides safety while maintaining operational flexibility
3Ease of manufacture
If the connection structure is mounted to the car-door opening/closing side, then ease of manufacture is improved, but the first coupling member must be correspondingly mounted to the car-body opening/closing side increasing assembly complexity
Solution Approach 1:
The connection structure and coupling members are designed with universal mounting capabilities. The connection structure can be mounted to either the car door or car body, and the corresponding coupling member is mounted to the opposite side. This universal design allows flexibility in installation while maintaining consistent coupling mechanisms, easing manufacture despite increased assembly options
Data Source
AI summary
A car door opening mechanism includes a connection structure that is selectively mounted to a car-door opening/closing side, a car-door bottom side, a car-body opening/closing side, or a car-body bottom side and a first coupling member correspondingly mounted to a car-body opening/closing side, a car-body bottom side, a car-door opening/closing side, or a car-door bottom side. When a car door is at a closed position relative to a car body, the first coupling member and the connection structure are coupled to each other and in opening the car door, the car door is constrained at a non-fully opened position due to the connection structure and the first coupling member being coupled to each other. When the first coupling member and the connection structure are detached from each other, the car door is allowed to open from the non-fully opened position to a fully opened position.