Retractable Pivot Hinge for Easier Door Alignment and Removal
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Solution Overview
Problem
Existing pivot hinges lack flexibility in installation and removal of pivotal door leaves, as they often require precise alignment of the pivot pin with the structural element and do not allow for easy lateral adjustment of the pivot pin position.
Innovation Solution
A pivot hinge with a slidable base member and lever assembly that allows for lateral adjustment of the pivot pin position and easy installation/removal, featuring a casing with a slidable base member and lever mechanism that can be operated from the side of the door leaf or structural element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pivot pin is fixed in position, then the connection between door leaf and structural element is stable, but the installation alignment and lateral adjustment are difficult
Solution Approach 1:
The pivot pin is designed to be movable within the casing rather than fixed, allowing it to be positioned laterally during installation and then locked in place. The lever assembly enables the pin to move between retracted and extended positions, providing dynamic adjustment capability while maintaining stability when installed.
Solution Approach 2:
The pivot hinge is divided into separate functional components: the casing, the movable pivot pin, the lever assembly, and the locking mechanism. This segmentation allows the pivot pin to be independently adjusted and positioned within the casing without affecting the overall structural integrity.
2Adaptability or versatility
If the pivot pin is extended for installation, then the door leaf can be mounted, but precise alignment with the structural element opening is required
Solution Approach 1:
The pivot pin can be extended beforehand during the installation process to facilitate mounting, and then retracted once the door leaf is positioned. This preliminary extension action allows installers to align the door more easily without requiring precise initial alignment, as the pin can be adjusted later.
Solution Approach 2:
The pivot pin's position parameter can be changed between extended and retracted states, and between different lateral positions within the casing. This parameter variability provides installation flexibility while reducing the need for high precision alignment, as adjustments can be made after initial positioning.
3Device complexity
If the pivot hinge uses a simple fixed pin design, then the structure is simple, but lateral adjustment of the pivot pin position is not possible
Solution Approach 1:
The pivot pin is nested within the casing, allowing it to move laterally and vertically while remaining contained. The lever assembly and locking mechanism are also nested within the casing structure. This nested design provides adjustment capability without significantly increasing the overall external dimensions or complexity of the hinge.
4Ease of operation
If the pivot pin is made retractable, then installation and removal are easier, but the mechanism for extending and retracting becomes more complex
Solution Approach 1:
The lever assembly acts as an intermediary mechanism between the operator and the pivot pin. By operating the lever, the user can indirectly control the extension and retraction of the pivot pin without directly manipulating the pin itself. This intermediary mechanism simplifies the operation while managing the mechanical complexity within the casing.
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
Facilitates easy alignment and adjustment of the pivot pin, enhancing the installation process and providing a robust, stable connection between the door leaf and structural element.
Implementation Method 1
The block has sliding faces that are in sliding engagement with the casing
Implementation Method 2
a lever member having a first end engaging the pivot pin, a fulcrum, and a second end
Data Source
AI summary
Pivot hinge having an extendable and retractable pivot pin for pivotally connecting a pivotal door leaf with a structural element. The door leaf having an upper edge, lower edge, an inner side edge and an outer side edge. The pivot pin defining a vertical pivot axis. The pivot hinge further comprises a casing configured to be mounted to either the door leaf or the structural element, for example at the upper edge of the door leaf, e.g. at a corner region between the inner side edge and the upper edge of the door leaf, wherein the pivot pin is movably provided in a vertical passage within the casing, and a lever assembly adapted to move the pivot pin between a retracted position and an extended position. The lever assembly is located within the casing and comprises a lever member having a first end engaging the pivot pin, a fulcrum, and a second end, and a lever adjustment member and being in engagement with the second end of the lever such that operating the lever adjustment member causes the lever to pivot about the fulcrum, which in turn causes movement of the pivot pin between the retracted and extended positions.