Self-Locking Hinge With Spring-Loaded Pin For Multiple Open Positions
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Solution Overview
Problem
Existing door operating mechanisms for vehicles with multiple locked open positions are either complex or space-consuming, making them unsuitable for work vehicles where space and simplicity are critical.
Innovation Solution
A self-locking hinge system utilizing one or more brackets and a spring-loaded pin assembly, which includes a pin with different diameter sections and a compressive spring to automatically lock and unlock, allowing the door to maintain multiple open positions while minimizing complexity and space usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex door operating mechanism is used to achieve multiple locked open positions, then the door can maintain multiple stable positions, but the device complexity increases
Solution Approach 1:
The hinge mechanism is segmented into distinct functional components: a pin with multiple diametric sections (first section with larger diameter, second section with smaller diameter), a first bracket with corresponding recesses, and a second bracket. This segmentation allows each component to perform a specific function while collectively achieving multiple locked positions through the interaction of these simplified elements.
Solution Approach 2:
The mechanism utilizes dynamic movement of the pin between different angular positions relative to the brackets. The pin can rotate to engage different diametric sections with corresponding recesses in the brackets, creating multiple stable locked positions. The spring-loaded design adds dynamic responsiveness, allowing automatic engagement and disengagement based on door position and force application.
2Reliability
If additional mechanisms are added to achieve multiple locked positions, then the door can maintain multiple open positions, but the space requirements increase
Solution Approach 1:
The invention merges multiple functions into a single integrated hinge assembly. The pin with varying diameters, the spring mechanism, and the bracket system are combined into one compact unit that provides both locking and positioning functions. This eliminates the need for separate locking mechanisms and reduces overall space requirements while maintaining multiple locked open positions.
Solution Approach 2:
The spring is nested within the pin structure, and the pin rotates within the bracket assembly. The smaller diameter section of the pin allows it to be received within recesses of the brackets, creating a nested configuration. This nesting approach maximizes functional complexity within minimal spatial envelope, keeping the hinge compact.
3Device complexity
If a simple hinge mechanism is used, then the space and complexity are minimized, but the door cannot maintain multiple locked open positions
Solution Approach 1:
The pin exhibits local quality variations through its non-uniform diameter along its length. The first section has a larger diameter for engagement with the first bracket's recess, while the second section has a smaller diameter for engagement with the second bracket's recess. This local differentiation in geometry allows a single simple-looking component to provide multiple engagement points and locked positions.
Solution Approach 2:
The mechanism utilizes changes in the pin's geometric parameters (diameter) at different sections to achieve multiple locked positions. The spring's force parameter also changes based on compression, providing varying locking forces at different positions. These parameter variations within a simple mechanical structure enable multi-position capability without increasing overall complexity.
4Ease of operation
If a spring-loaded pin mechanism is used for automatic locking, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The spring-loaded pin mechanism is self-actuating based on door movement and gravitational forces. When the door is moved to a locked position, the spring automatically compresses and engages the pin with the corresponding bracket recess without requiring external actuation. The mechanism serves itself by using the door's own movement to trigger the locking action, minimizing the need for additional control systems.
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 self-locking hinge system effectively maintains multiple locked open positions without increasing complexity or space requirements, ensuring the door remains securely locked in place while allowing easy operation and reducing the need for additional mechanisms.
Implementation Method 1
a spring biased in a compressed configuration between the connecting portion and the pin holder, with the spring applying a force in a first direction toward the locked position
Data Source
AI summary
A self locking hinge is disclosed which can index a door to multiple open positions and hold it in place. The door may be closed by opening it completely and then returning it to the closed position or by lifting the door to clear a portion of a locking mechanism and simultaneously closing it.