Compact Panic Fitting with Reversible Guide Link
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Solution Overview
Problem
Conventional panic fittings are wide and bulky, limiting design options and requiring a large movement space for the lever arm, which restricts their compact installation on both sides of a door.
Innovation Solution
A panic fitting design featuring a guide link with a non-linear guide surface that allows the lever arm to move over a constant width, enabling a narrower carriage while maintaining reliable power transmission, and allowing for easy adjustment and installation on either side of the door by using a plate-shaped guide link with retaining elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional panic fitting design is used with a lever arm mechanism, then the lock can be reliably actuated, but the overall width and bulk of the device increases
Solution Approach 1:
The guide link employs a non-linear guide surface (cam profile) that curves to control the lever arm movement. This curved surface allows the lever arm to pivot effectively within a compact width by translating linear slide movement into rotational lever arm movement, resolving the contradiction between reliable lock actuation and reduced device width
Solution Approach 2:
The guide link transforms the movement from a simple linear translation to a complex path involving both linear and rotational components. The non-linear guide surface creates a three-dimensional movement trajectory for the lever arm, enabling compact packaging while maintaining full actuation capability
2Adaptability or versatility
If the panic fitting is designed to be mounted on both sides of the door, then versatility is improved, but the mechanism requires more space for lever arm movement
Solution Approach 1:
The guide link with its non-linear guide surface serves multiple functions: it guides the lever arm movement, provides the mechanical advantage for lock actuation, and enables bidirectional mounting capability. The symmetric design of the guide surface allows the same component to function correctly whether mounted on the left or right side of the door, eliminating the need for separate mechanisms for each side
Solution Approach 2:
The non-linear guide surface is designed with asymmetric geometry that can be oriented in two directions. By rotating the guide link 180 degrees, the same asymmetric profile provides the correct mechanical geometry for the opposite door side, enabling universal application with a single component design
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
The design achieves a compact structure with reliable power transmission and easy adjustment, allowing the panic fitting to be mounted on both sides of a door without compromising its functionality, even when the door swings in different directions.
Implementation Method 1
at least one transmission gear, which translates the movement of the actuating device between the starting position and the end position into a linear movement of the slide towards the transmission gear
Implementation Method 2
The guide link (16) has a guide surface (18) ... on which a rolling element (20), which is mounted rotatably on the lever arm (12), rolls
Implementation Method 3
This actuating mechanism is in its initial position when no external force is applied, and is held in this position by a spring mechanism
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
The invention relates to a panic hardware (1), in particular a push bar, comprising the following components: • an actuating device (2) which, when actuated (B), is adjustable from an initial position (A) to an end position (E), • at least one transmission gear (6a, 6b), • a slide (8), and • a rotatably mounted nut (13) which has a receptacle (13') for a connecting element (20), in particular for a locking shaft for connection to a lock, wherein the nut (13) has a lever arm (12) with a sliding or rolling element (9), and wherein the at least one transmission gear (6a, 6b) translates the movement of the actuating device (2) between initial position (A) and end position (E) into a linear movement of the slide (8) in the direction of the transmission gear (6a, 6b), and wherein the nut (13) itself, in particular when not connected to the lock,is freely pivotable about its axis of rotation (DA) at least in an area above the slide (8), wherein a guide cam (K) can be arranged on the slide (8), wherein the guide cam (K) has a guide surface (FF) for the sliding or rolling element (9), and wherein the guide cam (K) can be arranged on the slide (8) in at least two different, in particular mutually mirror-image, orientations for adjusting the direction of rotation of the nut (13) when actuating (B) the actuating device.