Door Hinge Pin Recess Locking Mechanism
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Solution Overview
Problem
Existing door hinges face challenges in achieving easy assembly, play-free fastening, and secure connection, particularly with profile doors made of aluminum or plastic where deep cuts are not feasible for stability and insulation reasons, leading to unsatisfactory fastening and increased effort.
Innovation Solution
A door hinge design featuring two hinge halves with a strap flap and receiving body, where the strap flap has pins and recesses for secure engagement, and a grub screw mechanism for additional locking, allowing for simple, secure, and separable connection between the door frame and leaf.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple push-in connection is used, then easy assembly is achieved, but secure fastening and prevention against pulling out is insufficient
Solution Approach 1:
The connection system is divided into multiple independent pin-recess pairs distributed around the strap flap and receiving body. Each pin-recess pair provides individual engagement, and collectively they distribute the loading, preventing pull-out while maintaining simple assembly through the modular pin-and-recess geometry.
Solution Approach 2:
The recesses include vertical sections that extend in the depth direction, creating a three-dimensional engagement path for the pins. This vertical dimension prevents the strap flap from being pulled out axially, while the overall connection remains simple to assemble through the push-in motion.
2Reliability
If deep cuts are made in profile doors for hinge insertion, then secure fastening is achieved, but stability and insulation are compromised
Solution Approach 1:
Instead of requiring a single deep cut, the connection is achieved through multiple shallow pin-recess engagements distributed around the hinge interface. This segmented approach provides secure fastening without compromising the structural integrity and insulation of the profile door.
Solution Approach 2:
The vertical sections of the recesses engage the pins in the depth direction, providing secure fastening through multi-dimensional engagement rather than relying on deep lateral cuts. This preserves the door profile's stability and insulation while achieving reliable connection.
3Reliability
If multiple pins and recesses with vertical sections are used, then secure engagement and prevention against pulling out is achieved, but device complexity increases
Solution Approach 1:
The pin-recess system serves multiple functions simultaneously: the pins provide positioning, the vertical sections prevent pull-out, and the distributed arrangement distributes loads. This multi-functionality is achieved through a relatively simple geometric form that does not require additional complex components.
Solution Approach 2:
The positioning and anti pull-out functions are merged into a single integrated pin-recess structure. The pins and recesses with vertical sections combine multiple security features in one element, avoiding the need for separate components and reducing overall device complexity.
4Ease of operation
If the hinge is designed for easy separation, then ease of operation is improved, but secure connection during operation may be compromised
Solution Approach 1:
The hinge transitions between two dynamic states: during installation, the strap flap is pushed in to engage the pins in the vertical recesses, creating a secure locked connection; during removal, the strap flap is pulled out to disengage the pins. This dynamic behavior allows both secure operation and easy separation.
Solution Approach 2:
The connection is segmented into multiple pin-recess pairs that can be engaged or disengaged independently. This allows the hinge to be securely connected during operation through multiple engagement points, while still allowing easy separation by reversing the push-in motion that engages all pins simultaneously.
Data Source
Figure 1
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Figure 3
AI summary
The structure has a tape lobe (1) that is provided with a projecting pin (4) which is engaged in recess (5) of receiving portion (2). The tape lobes are slid into receiving portion by lowering a door casement-side tape half portion against a withdrawal. The tape lobe is provided with a threaded bore in which a set-screw (9) is arranged. The set screw is pivoted according to lowering of door casement-side tape half portion into hole (11) which is formed adjacent to threaded bore in receiving portion, so that door casement-side tape half portion is locked.