Door Hinge Axial Locking Mechanism for Security
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Solution Overview
Problem
Conventional hinges allow the hinge bolt to be driven out when the sash is closed, compromising security and making assembly and disassembly more difficult, especially in modern constructions with a 'top deck' design that requires a larger clear width between the sash and frame.
Innovation Solution
The hinge pin is arranged in a rotationally fixed manner within one hinge part, featuring axial stop and counter-stop surfaces that overlap when the sash is closed, preventing the hinge bolt from being removed, while allowing easy assembly and disassembly by positioning the stop and counter-stop surfaces to determine the opening area and maintain play-free rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the hinge bolt is made removable for easy assembly and disassembly, then the ease of operation is improved, but the security against burglary deteriorates
Solution Approach 1:
The hinge system dynamically changes its locking mechanism based on the sash position. When the sash is open, the hinge bolt is accessible and removable for assembly/disassembly. When the sash is closed, the geometry of the hinge parts automatically engages stop and counter-stop surfaces that lock the hinge bolt in place, preventing removal and providing security.
2Adaptability or versatility
If a larger clear width is provided between sash and frame for top deck construction, then the adaptability is improved, but the difficulty of detecting and measuring deteriorates
Solution Approach 1:
The hinge design accommodates the larger clear width requirement by utilizing the axial dimension along the hinge axis. The longitudinal recess and the displacement of the hinge bolt in the axial direction provide the necessary clearance space, allowing the sash to be positioned further from the frame while maintaining proper engagement and adjustment capabilities.
3Reliability
If the hinge bolt is displaced in the axial direction to prevent driving out, then the reliability is improved, but the ease of operation deteriorates
Solution Approach 1:
The hinge bolt is pre-positioned and fixed to the frame hinge part before final assembly. The longitudinal recess is pre-formed to guide the sash hinge part during assembly. When assembling, the sash is hung on the already-positioned hinge bolt by sliding it into the recess, maintaining ease of assembly despite the axial displacement that prevents later removal.
Data Source
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AI summary
The hinge (100) has a frame part (2) fixable on the frame and a casement part (1) fixable on the casement. A hinge bolt is fixed rotationally secured in one of the hinge parts (1) and in the area engaging in the other hinge part (2) has an axial stop face. The other hinge part (2) has an axial counter stop face and the stop and counter stop faces are arranged so that in one position of the hinge parts which corresponds to the closed casement they lock the hinge bolt in the second hinge part in the direction of the hinge axis (S). The hinge bolt has at the end of an area projecting into the other hinge part an axial projection of smaller diameter on which a radially protruding projection is formed which creates the first stop face.