Wind-Actuated Rotating Wing Door Frame Impact Noise Prevention
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Solution Overview
Problem
Existing door closure prevention devices are cumbersome to install and remove, and they either damage doors over time or make it difficult to completely close doors, leading to safety issues and noise disturbances due to sudden door closures caused by strong winds.
Innovation Solution
An impact noise prevention device installed on a door frame with wings that rotate around a hinge due to wind force, featuring front and rear cushioning members to absorb impacts and reduce noise during door closure and opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a door closing prevention device is installed between the door and door frame, then the door can be prevented from closing, but the installation becomes difficult and the door cannot be completely closed
Solution Approach 1:
The patent introduces a door frame-mounted structure with a rotatable support arm that acts as an intermediary between the door and the prevention mechanism. The support arm rotates around a hinge axis mounted on the door frame, allowing the door to close freely while the arm blocks the door at controlled positions, thus solving both the prevention reliability and installation convenience contradictions
Solution Approach 2:
The support arm is designed to be rotatable rather than fixed, allowing it to dynamically adjust its position. The arm can rotate to block the door when needed for prevention, and rotate away to allow complete door closure when necessary, providing both prevention reliability and operational flexibility
2Reliability
If a support is inserted to abut against the door to prevent closing, then the door can be prevented from closing, but the door is damaged over time due to repeated impact at the same position
Solution Approach 1:
The support arm is designed to rotate around a hinge axis, allowing it to dynamically change its blocking position. When the door approaches, the arm rotates to block at different locations along its length, distributing the impact force across multiple areas of the door rather than concentrating it at one point, thus preventing door damage while maintaining prevention reliability
Solution Approach 2:
The support arm can be viewed as segmented along its length, with different portions capable of contacting the door at different positions. This segmentation allows the system to distribute the mechanical stress across multiple contact zones, preventing localized damage to the door
3Ease of operation
If the support is completely rotated to allow door closure, then the door can be completely closed, but the operation becomes uncomfortable and complex
Solution Approach 1:
The support arm automatically rotates out of the way through its own hinge mechanism when the door needs to close completely. The system serves itself by using the door's own closing motion to trigger the arm's rotation, eliminating the need for manual intervention or complex control mechanisms, thus maintaining ease of operation
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
Convenient installation and removal of the device, reduced impact and noise from sudden door closures, and prevention of safety accidents by allowing controlled door closure without damaging the door or disturbing occupants.
Implementation Method 1
allows the wings to rotate around the hinge by the force of the wind passing between the opening/closing door and the door frame, i.e. the wind force
Data Source
AI summary
The present invention relates to a prevention device that is installed on a door frame of an opening/closing door to prevent sudden closing of the opening/closing door, and more particularly, to an impact noise prevention device for an opening/closing door which is configured to install wings on one side of a hinge fixed to the door frame, allows the wings to rotate around the hinge by the force of the wind passing between the opening/closing door and the door frame, i.e. the wind force, thereby reducing the impact and noise caused by the sudden closing of the opening/closing door, and is installed in the door frame to conveniently perform its installment and removal.