Rotary Damping Panic Bar with Plastic Stop Elements
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Solution Overview
Problem
Existing panic push bars are expensive due to costly linear damping elements, require significant space, and provide damping only in one direction of movement, limiting their functionality and compatibility with locks in door leaves.
Innovation Solution
Incorporating a rotary damping element with stop dampers made of plastic, such as polyurethanes or elastomers, which can be positioned variably within the housing to provide damping in both directions of movement, and using these dampers to prevent direct contact between the release handle and the housing, thereby enhancing damping efficiency and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a linear damping element is used to dampen the pivoting movement of the pivoting lever, then damping is provided in one direction of movement, but the product cost increases and the device requires significant space
Solution Approach 1:
Instead of using a linear damping element that moves linearly to dampen the pivoting lever, the patent inverts the approach by using a rotary damping element that rotates to provide damping. This rotary damping element is connected to the pivoting lever via a connecting rod, converting the pivoting motion into rotational motion of the damper. This inversion allows for more compact design and lower cost while maintaining damping effectiveness in both directions of movement.
Solution Approach 2:
The patent transitions from linear damping movement to rotary damping movement, changing the dimension of motion from linear to rotational. This dimensional change enables the damping element to be positioned at various points within the housing and provides damping in both directions of movement of the pivoting lever, while reducing the overall space required and manufacturing cost.
2Reliability
If a linear damping element is used to dampen the pivoting movement, then damping is provided in one direction, but the device requires a relatively large amount of space
Solution Approach 1:
The patent inverts the damping mechanism from linear to rotary motion. The rotary damping element, connected via a connecting rod, utilizes rotational motion to provide damping force. This inversion allows the damping element to be more compact and positioned at various points within the housing, reducing the overall space requirement while maintaining effective damping in both directions of movement.
Solution Approach 2:
By changing the dimension of motion from linear to rotational, the patent enables the damping element to occupy less space. The rotary damping element can be positioned at various points within the housing, utilizing the rotational degree of freedom to provide damping more efficiently in terms of space utilization.
3Reliability
If a linear damping element is used, then damping is provided in one direction of movement, but the panic push bar cannot be effectively combined with locks in door leaves
Solution Approach 1:
The patent inverts the damping mechanism to utilize rotary motion, which provides damping in both directions of movement of the pivoting lever. This bidirectional damping capability enhances the adaptability of the panic push bar, allowing it to be effectively combined with locks in door leaves, as the damping action now supports the lock mechanism's operation in both opening and closing directions.
Solution Approach 2:
The transition from linear to rotary damping movement enables the system to handle bidirectional motion more effectively. This dimensional change in the damping mechanism provides versatility, allowing the panic push bar to be integrated with locks that require damping in both directions of movement, thereby improving compatibility and adaptability.
4Object-affected harmful factors
If stop dampers are added to prevent direct contact between the release handle and housing, then noise is reduced and damping efficiency is enhanced, but the device complexity increases
Solution Approach 1:
The patent introduces stop dampers as intermediary elements between the release handle and the housing. These stop dampers act as mediators that prevent direct contact between the release handle and housing, thereby reducing noise and enhancing damping efficiency. The stop dampers are positioned at critical contact points to intercept and absorb impact forces before they can cause noise-generating contact.
Solution Approach 2:
The stop dampers serve as beforehand cushioning elements that are positioned in advance to prevent direct contact between the release handle and housing. By placing these dampening elements at potential contact points, the system pre-absorbs impact forces before they can cause noise or damage, thereby reducing noise and enhancing damping efficiency without requiring complex active control systems.
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 solution allows for cost-effective production of panic push bars with improved damping properties in both directions of movement, reduces noise, and prevents direct contact between moving parts, enhancing the overall functionality and compatibility with locks.
Implementation Method 1
a damping element dampens the pivoting movement of the pivoting lever... the piston being connected to a piston rod which is indirectly connected to the pivoting lever... damping element which executes a linear damping movement
Implementation Method 2
stop dampers made of plastic, such as polyurethanes or elastomers... Foam plastics are particularly suitable here, which also have a high level of elasticity over a long period of time
Data Source
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AI summary
The panic push rod has housing with an upper part and a lower part, where the upper part and the lower part are movable relative to each other. A stop damper is provided between the upper part and lower part, which prevents a contact between the upper part and the lower part during triggering of the panic push rod. The stop damper is made of plastic, particularly foam plastic or polyurethane.