Concealed Hinge Asymmetry Prevents Rebate Collision
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Solution Overview
Problem
Concealed door hinges prove difficult to use with rebated door leaves as the rebate can be damaged during pivoting due to collision with the door frame, existing solutions failing to effectively manage this issue.
Innovation Solution
The door design features a concealed hinge system where the axis of rotation is shifted near the rebate, allowing the rebated edge to move away from the door frame upon opening, with asymmetric hinge brackets and varying link guides ensuring an arcuate trajectory, and adjustable inserts for optimal alignment and space utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a concealed door hinge is used with a rebated door leaf, then the hinge is not visible from the outside and provides a clean appearance, but the rebate can be damaged during pivoting due to collision with the door frame
Solution Approach 1:
The patent employs asymmetric hinge brackets with different link guide lengths on each side, creating an asymmetric pivoting path that moves the rebate away from the door frame during opening. This asymmetry resolves the contradiction by maintaining the concealed appearance while preventing rebate damage through non-uniform motion geometry.
Solution Approach 2:
The patent implements an arcuate trajectory for the door leaf receiving body relative to the door frame receiving body, replacing linear movement with curved motion. This curved path ensures the rebate clears the door frame during pivoting, eliminating collision damage while preserving the concealed hinge design.
2Object-affected harmful factors
If the axis of rotation is shifted near the rebate to prevent damage, then the rebated edge moves away from the door frame during opening, but the door leaf receiving body becomes narrower and requires precise alignment
Solution Approach 1:
The patent incorporates adjustable inserts that allow pre-alignment of the door leaf receiving body before final installation. This preliminary adjustment capability compensates for the narrowed receiving body dimensions, enabling precise positioning without increasing overall device complexity.
Solution Approach 2:
The patent allows adjustment of the horizontal offset parameter between receiving bodies through interchangeable inserts. By making this critical dimension adjustable rather than fixed, the system accommodates manufacturing tolerances and installation variations, reducing alignment precision requirements.
3Object-affected harmful factors
If asymmetric hinge brackets with different link guide lengths are used, then the door leaf receiving body moves along an arcuate trajectory preventing rebate collision, but the hinge mechanism becomes more complex
Solution Approach 1:
The patent divides the hinge system into modular components: standardized hinge brackets, adjustable inserts, and separate receiving bodies. This segmentation allows the asymmetric link guides to be implemented only where needed for trajectory control, rather than complicating the entire hinge mechanism uniformly.
Data Source
AI summary
The hinge has a door frame hinge bracket (5') rotatably supported on a door hinge receiving body (3') around a swivel joint (4'), and a door leaf hinge bracket (5) rotatably supported on a door leaf receiving body (3) around a swivel joint (4). A guide rail (8') at the body (3') is smaller than a guide rail (8) at the body (3), which comprises a projection (11) at an open side of the leaf receiving body. The projection is extended into a seam of a door leaf (2) after to the installation of the body (3). The swivel joint (4) is arranged within the projection.