Anti-Panic Push Bar Symmetrical Door Openers
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Solution Overview
Problem
Existing anti-panic push bars for emergency exit doors suffer from asymmetrical actuation leading to jamming, suboptimal force distribution, and require separate designs for different door widths due to inflexible length adjustments.
Innovation Solution
An anti-panic push bar with a base profile and actuating profile featuring two door openers or emergency exit openers positioned at opposite ends, ensuring symmetrical force distribution and adjustable length, using a sliding device and transmission mechanism to actuate the door lock.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single door opener is used in the base profile, then the locking function is achieved, but asymmetrical actuation causes jamming and tilting
Solution Approach 1:
The patent applies asymmetry in reverse by introducing symmetry - two door openers are positioned symmetrically at opposite ends of the base profile. This symmetrical arrangement ensures that forces are distributed evenly during actuation, preventing the jamming and tilting problems caused by asymmetrical single-point locking mechanisms.
2Reliability
If the base profile length is fixed for a specific door width, then the locking mechanism works correctly, but separate designs are needed for different door widths
Solution Approach 1:
The base profile is designed as a universal component that can accommodate different door widths. The two door openers are positioned at the extreme ends of the base profile, allowing the entire assembly to be trimmed or adjusted to fit various door widths while maintaining the functional integrity of the locking mechanism.
3Volume of moving object
If the door opener is positioned inside the base profile, then the structure is compact, but force distribution is suboptimal leading to increased holding forces
Solution Approach 1:
Instead of positioning the door openers within the internal space of the base profile, the patent places them at the external extreme ends of the base profile along its longitudinal axis. This dimensional repositioning maximizes the lever arm and optimizes force distribution during actuation, reducing the holding forces required compared to compact internal positioning.
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
Prevents jamming and tilting by distributing force symmetrically, allows flexible length adjustment, and maintains operational reliability across varying door widths.
Implementation Method 1
connected via a nut drive or a crank rod to an output nut for actuating a door lock
Implementation Method 2
connected via a nut drive or a crank rod to an output nut for actuating a door lock
Data Source
Figure 1
Figure 2a~2b
Figure 3a~3b
AI summary
An anti-panic push bar (2) for an escape door or emergency exit door (11) is proposed, comprising an actuating profile (21) which can be actuated relative to a base profile (22) in order to open a door lock (14) in an emergency. To facilitate assembly and, in particular, to eliminate the need for an additional escape door lock, it is proposed that two door openers (31, 32) or escape door openers (31, 32) be provided, which are arranged outside the actuating profile (21) and outside the base profile (22), each in the end region of the anti-panic push bar (2) in such a way that each of the door openers or escape door openers (31, 32) directly or indirectly blocks or enables actuation of the actuating profile (21).