Panic Fitting Driver Element Integration for Compact Door Installation
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Solution Overview
Problem
Conventional panic fittings require an additional toothed element to convert pivoting movement of the panic bar into rotary movement of the square socket, leading to increased installation space requirements and potential damage from cramped installations, especially in double-leaf doors.
Innovation Solution
The panic fitting integrates a driver element directly on the fastening means, which interacts with the square socket, eliminating the need for an additional toothed element and allowing both bearing extensions to be molded or welded to the base element, enabling direct interaction with the square socket.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional toothed element is used to convert pivoting movement into rotary movement, then the conversion function is achieved, but the installation space increases and collision risk increases
Solution Approach 1:
The patent combines the toothed element function directly into the fastening means by integrating a toothed lever that interacts with the square receptacle. This merging eliminates the need for separate additional toothed elements while maintaining the conversion function from pivoting to rotary movement, thereby reducing installation space requirements.
Solution Approach 2:
The fastening means is designed to perform multiple functions: it serves as both the mounting structure for the panic bar and the drive mechanism for the square receptacle. The toothed lever integrated into the fastening means simultaneously provides structural support and mechanical conversion, eliminating the need for dedicated separate components.
2Stability of the object's composition
If bearing extensions are arranged on either side of the square spindle, then the structural stability is improved, but the housing space increases and collision damage risk increases
Solution Approach 1:
The patent relocates the bearing extensions from a lateral arrangement (on either side of the square spindle) to a longitudinal arrangement (at the ends of the base element). This dimensional repositioning allows the housing to be more compact in the critical lateral direction, reducing the risk of collision with adjacent door components while maintaining structural stability through the longitudinal bearing support.
3Ease of operation
If the housing protrudes from the door frame, then the operational access is improved, but the collision risk with second door leaf increases
Solution Approach 1:
The patent applies different spatial characteristics to different parts of the housing: the operational interface (panic bar and fastening means) maintains sufficient protrusion for easy access, while the bearing extensions and drive mechanism are positioned more retracted along the longitudinal axis. This localized spatial differentiation ensures operational accessibility while minimizing collision risk with adjacent door components.
Data Source
Figure 1~2
Figure 3a~3d
Figure 4~5b
AI summary
The fitting (1) has a base element (4) including a mounting face for abutment on a frame of a door, where the base element is mounted in a rotatable square housing (6). The base element includes two parallel and spaced-apart bearing extensions. An attachment unit (5) includes a base body (5a) rotatably mounted on the bearing extensions, where a driver element is integrally formed at the base body for the positive drive of the square housing, where the driver element cooperates with a bearing surface of the square housing.