Universal Anti-Panic Push Bar with Rotatable Drive Nut
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Solution Overview
Problem
Existing anti-panic push bars are not universally compatible with both DIN left and DIN right-hinged doors without requiring structural modifications or component replacements, limiting their application and storage efficiency.
Innovation Solution
An anti-panic push bar design featuring a driven nut with two neutral positions, allowing 180° rotation to switch between left and right configurations without structural intervention, utilizing an eccentric cam to translate the pulling movement into a rotary motion for the door lock, and incorporating a transmission device with two-armed levers for compactness and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an anti-panic push bar is designed for a specific hinging direction (DIN left or DIN right), then the structural design can be optimized for that specific application, but the device cannot be used on doors with the opposite hinging direction without structural modifications
Solution Approach 1:
The push bar is designed with a rotatable connecting rod that can be positioned in two different orientations (0° and 180°), allowing the same device to function correctly on both DIN left-hinged and DIN right-hinged doors. This multi-functional design eliminates the need for different models or structural modifications, directly resolving the contradiction between versatility and device complexity
Solution Approach 2:
The connecting rod is designed to be rotatable rather than fixed, enabling dynamic reconfiguration of the push bar's internal geometry. This dynamic element allows the device to adapt its configuration based on the door hinging direction, achieving universality without adding complex conversion mechanisms
2Adaptability or versatility
If different models of anti-panic push bars are manufactured for DIN left and DIN right doors, then each model can be optimized for its specific application, but storage requirements and inventory complexity increase
Solution Approach 1:
By incorporating a rotatable connecting rod that can be adjusted to two positions, a single push bar model serves both DIN left and DIN right door applications. This eliminates the need to manufacture and store multiple variants, directly reducing inventory complexity while maintaining optimization for both door types
Solution Approach 2:
Instead of creating permanent separate models for different door types, the invention allows the same device to be reconfigured and reused for different applications by rotating the connecting rod, effectively discarding the need for multiple variants and recovering the use of a single universal device
3Adaptability or versatility
If conversion mechanisms are added to enable use on both door types, then versatility improves, but the installation process becomes more complex and time-consuming
Solution Approach 1:
The rotatable connecting rod provides a simple mechanical adjustment mechanism that requires minimal tools and steps for conversion. The dynamic reconfiguration is achieved through a single rotation action rather than complex assembly/disassembly procedures, maintaining ease of operation while improving versatility
Solution Approach 2:
The connecting rod is pre-designed with mounting features that allow it to be positioned in either 0° or 180° orientation during installation. This preliminary design consideration enables installers to configure the device for the correct door type during the initial installation without requiring post-installation conversions
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
Enables universal use on both DIN left and DIN right doors without modifying the push bar, reducing storage needs and ensuring high functional reliability with a compact, efficient design that can be easily adjusted using a conventional door handle.
Implementation Method 1
the pin being connected to the driven nut via an eccentric cam fixed in a rotationally fixed manner to the driven nut. Due to the non-rotatable connection of the eccentric cam with the driven nut, the pulling movement transmitted from the connecting rod to the pin is translated into a rotary movement of the driven nut.
Data Source
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AI summary
The invention relates to an anti-panic push bar (2) for unlocking a door lock (16) of an escape door or emergency exit door. The anti-panic push bar (2) has an operating handle (21) for manually unlocking the door lock. When manually actuated, the handle actuates a drive nut (34) via a sliding device (3), thus unlocking the door lock (16). To enable universal applicability of the anti-panic push bar, it is proposed that the drive nut (34) has two neutral positions. The first neutral position is for right-hinged door leaves, and the second neutral position is for left-hinged door leaves. The drive nut (34) is rotatable by 180° to move from the first neutral position to the second neutral position.