Anti-panic Push Rod with Guide Groove for Low-friction Operation
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Solution Overview
Problem
Existing anti-panic push bars for escape doors or emergency exit doors are structurally complex and noisy, requiring significant effort and producing annoying friction noises during operation.
Innovation Solution
An anti-panic push bar design featuring a base profile with a groove and a movably mounted actuating profile, utilizing a slider with sliding pieces and a transmission device to reduce friction, allowing for easy operation with minimal noise and effort, adaptable to different door types and sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional slider guide structure is used in the anti-panic push bar, then the slider is supported by the base profile, but friction arises during slider movement causing noisy operation and requiring significant operational force
Solution Approach 1:
The patent extracts the harmful friction contact between the slider and base profile by introducing a groove with a gap. The slider is guided through the gap rather than along the base profile surface, removing the source of friction and noise. The groove is open towards the interior of the base profile, allowing the slider to move freely without contact friction.
Solution Approach 2:
The groove with gap acts as an intermediary structure between the slider and base profile. Instead of direct contact guidance, the groove provides a guided path through the gap that eliminates friction. The sliding pieces on the slider pass through the gap, using it as a mediator for low-friction movement.
2Ease of operation
If the groove is closed or fully enclosed, then the slider is well-supported, but friction and noise increase due to contact between the slider and groove walls
Solution Approach 1:
The groove is designed with asymmetric openness - it is open towards the interior of the base profile but has controlled boundaries. This asymmetric design allows the slider to be guided through the gap while maintaining stability, preventing tilting and jamming despite the open structure.
Solution Approach 2:
The groove structure dynamically balances guidance and freedom of movement. The gap provides sufficient clearance for friction-free movement while the groove boundaries maintain proper alignment. The sliding pieces on the slider dynamically interact with the gap to provide guidance without contact.
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 reduces operational force and noise, ensuring smooth and quiet operation while being versatile for various door locks and sizes, enhancing user comfort and reliability.
Implementation Method 1
Because the groove has a gap extending in the longitudinal direction, no friction can arise at this point. In addition, the sliding pieces further reduce friction and also ensure that the guide of the slider in the groove or the gap can be opened without jamming or tilting.
Data Source
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AI summary
The invention relates to an anti-panic push rod (2) for actuating a door lock (14) of an escape door or emergency exit door (11), comprising a base profile (22) and an actuating profile (21), as well as a slide device (23) for actuating an output nut (25) in order to open a door lock (14) in an emergency. In order to enable actuation of the anti-panic push rod (2) with as little friction and reduced noise as possible, it is proposed that the base profile (22) have a groove (24) in the bottom region for supporting a slide (4) of the slide device (23), wherein the groove (24) has a gap (243) open towards the interior of the base profile, the clear width (8) of which is narrower than a transverse extent of the slide (4).