Vehicular Door Linkage With Integrated Check for Compact Full-Open Hold
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Solution Overview
Problem
Conventional vehicular door devices require space for a check arm to rotate, restricting installation and necessitating a need for a more compact solution that maintains the door at a full opened position without compromising installation space.
Innovation Solution
A vehicular door device incorporating first and second link arms, an inclinable lever, a biasing member, and a check mechanism, where the inclinable lever is biased to an erect state and engages with the check mechanism at the full opened position, allowing the door to be held securely while being stored in a narrow clearance when closed, enabling compact installation and wide open space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a check arm is used to hold the door at full opened position, then the door can be stably held, but the space required for check arm rotation restricts installation
Solution Approach 1:
The check mechanism is integrated into the first link arm, merging two separate components (check arm and link arm) into one. This eliminates the need for a separate check arm rotation space while maintaining the door holding function at the full opened position.
Solution Approach 2:
The check mechanism is nested within the first link arm structure, allowing it to be stored in a clearance between the door and door opening when not in use. This nesting approach minimizes the space required while preserving the checking function.
2Reliability
If a check arm rotation space is provided, then the door can be held at full opened position, but the device complexity increases
Solution Approach 1:
By combining the check mechanism with the first link arm into a single integrated component, the overall device complexity is reduced. The merged structure eliminates the need for separate check arm mounting and rotation mechanisms.
Solution Approach 2:
The first link arm serves multiple functions: it provides the checking function to hold the door at full opened position, maintains door support functionality, and eliminates the need for separate check arm rotation space, thereby reducing overall device complexity.
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
The solution allows for stable door holding at the full opened position with a simple configuration, ensuring high mountability and reliability, while maintaining a compact design that minimizes constraints on the vehicle body and enhances design freedom.
Implementation Method 1
The biasing member biases the inclinable lever, and holds the inclinable lever in an erect state
Implementation Method 2
The check mechanism engages with the inclinable lever in the erect state by movement of the door to a full opened position, and holds the door at the full opened position
Data Source
AI summary
A vehicular door device includes an inclinable lever provided at an open-side end portion of a door opening being opened and closed by a door, based on an operation of a link mechanism formed of first and second link arms, a biasing member that biases the inclinable lever and holds the inclinable lever in an erect state, and a check mechanism that engages with the inclinable lever in the erect state by movement of the door to a full opened position, and holds the door at the full opened position. The first link arm is provided at a position close to the open-side end portion of the door opening by an opening operation of the door, and the check mechanism is provided integrally with the first link arm. Then, the inclinable lever is stored in a clearance between the door and the open-side end portion of the door opening.