Spring-Loaded Door Stop Rotor Mechanism
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Solution Overview
Problem
There is a need for a door stop that can be easily installed and removed without tools or equipment, without damaging the door or doorframe, and can be activated by engagement with the doorjamb to prevent accidental door closure, particularly for protecting young children from finger injuries.
Innovation Solution
A door stop device featuring a clamp with spring force attachment to the door, an elongated latch with a beveled end for engagement with the doorjamb, and a rotor mechanism that rotates between vertical and horizontal positions to prevent door closure, utilizing a latch spring mechanism and elastic bands for activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If commercial door closer devices are used to prevent rapid door closing, then finger pinch protection is improved, but installation complexity and permanent damage to door and doorframe increase
Solution Approach 1:
The door stop device is divided into separate functional components: a clamp assembly for attachment to the door, a latch mechanism for engagement with the doorjamb, and a rotor mechanism for blocking door closure. This segmentation allows each component to be optimized independently and simplifies installation without requiring permanent modification to the door or doorframe.
Solution Approach 2:
The latch mechanism acts as an intermediary between the door and doorjamb, providing a controlled engagement point that prevents rapid closure without requiring direct modification of the door structure. The rotor mechanism serves as an intermediary blocking element that physically prevents door closure when engaged.
2Reliability
If commercial door closer devices are used to prevent rapid door closing, then finger pinch protection is improved, but permanent damage to door and doorframe increases
Solution Approach 1:
The clamp assembly utilizes a flexible spring mechanism that allows the clamp to be inserted over the door edge and secured without requiring permanent fasteners or modifications. The flexible nature of the spring-based attachment system prevents damage to the door and doorframe while maintaining secure attachment.
Solution Approach 2:
The door stop device is designed as a temporary, removable installation that can be easily removed without damaging the door or doorframe. The spring-based clamp and latch mechanisms are intended for short-term use and can be detached cleanly, avoiding permanent modification of the door structure.
3Ease of operation
If simple bumpers are slipped over the door edge, then ease of installation is improved, but the device must be removed before the door can close again
Solution Approach 1:
The latch mechanism incorporates a dynamic spring-loaded system that automatically engages with the doorjamb when the door is closed and automatically releases when the door is opened. This dynamic behavior allows the device to remain on the door continuously, providing ongoing protection without requiring removal, while still allowing normal door operation.
Solution Approach 2:
The door stop device provides continuous protection against accidental closure by remaining engaged with the doorjamb throughout the door's movement. The spring mechanism ensures the latch maintains constant contact with the doorjamb, providing uninterrupted finger pinch protection without requiring the device to be removed or reinstalled.
4Reliability
If a latch mechanism engages with the doorjamb to prevent closure, then finger pinch protection is improved, but the device complexity increases
Solution Approach 1:
The latch mechanism combines multiple functions into a single integrated component: engagement with the doorjamb, activation by door closure, and triggering of the rotor blocking mechanism. This merging of functions reduces the need for separate components and simplifies the overall latch system while maintaining reliable door closure prevention.
Solution Approach 2:
The spring mechanism pre-loads the latch in a position that anticipates door closure. When the door begins to close, the pre-positioned latch automatically engages with the doorjamb before full closure can occur, triggering the rotor mechanism to block the door. This preliminary positioning eliminates the need for complex sensing or 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 provides a secure, tool-free, and damage-free door stop that effectively prevents door closure, ensuring safety by engaging with the doorjamb and using a spring mechanism to maintain the rotor in a position that prevents the door from shutting, thus protecting fingers from pinching.
Implementation Method 1
Spring tension from an elastic band of the latch spring mechanism urges and pulls the latch along the guide rails of the clamp until the clamp engages a shoulder of the latch
Implementation Method 2
Spring tension from an elastic band of the latch spring mechanism urges and pulls the latch along the guide rails of the clamp
Implementation Method 3
A rotor spring mechanism having an elastic band extends between the rotor and the latch. The rotor spring mechanism urges the rotor toward the horizontal safety position
Data Source
AI summary
A door stop for a door includes a clamp that is securable over a first side edge of a door. The clamp has a guide. An arm has a receiving portion for receiving the guide to permit movement of the arm on the clamp between an open position and a closed position. A spring mechanism is operably coupled to the clamp and the arm, and urges the arm on the guide of the clamp toward the closed position. In the closed position, the arm prevents the door from engaging with a respective door jamb.