Adjustable Door Stop Hinge Pin Mechanism
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Solution Overview
Problem
Existing door stop systems often damage hollow core doors and adjacent walls due to continuous pressure, and they are not easily adaptable to various hinge mounted doors and new constructions.
Innovation Solution
An adjustable door stop system utilizing a cylindrical hinge pin with a movement control cylinder and cap, featuring radially extending fingers and teeth, that interfaces with hinges to prevent axial movement beyond a desired position without touching the door or wall, allowing for easy adjustment of door opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a padded adjustable post is used to stop door movement, then the door movement is controlled, but continuous pressure against the hollow core door results in damage to the door
Solution Approach 1:
The patent introduces an intermediary mechanism (the hinge pin with integrated stop features) that mediates between the door and the stopping function. The stop is built into the hinge pin structure itself, which rotates with the door, thereby eliminating the need for separate padded posts that exert continuous pressure on the door.
Solution Approach 2:
The patent extracts the stopping function from separate padded posts and integrates it directly into the hinge pin mechanism. By taking out the independent stop component and merging it with the hinge pin, the system eliminates the harmful continuous pressure while maintaining the door movement control function.
2Adaptability or versatility
If a door stop system is designed to be adjustable to various positions, then versatility is improved, but the complexity of the device increases
Solution Approach 1:
The patent merges the adjustability feature with the basic hinge pin structure by integrating teeth and corresponding engagement features directly into the hinge pin. This combination allows the hinge pin to serve dual functions: providing the hinge mechanism and enabling adjustable stopping positions, thereby achieving versatility without proportionally increasing complexity.
Solution Approach 2:
The patent implements dynamics by allowing the hinge pin to rotate and engage with teeth at different positions along its length. This dynamic engagement mechanism enables the stop position to be adjusted by simply rotating the hinge pin, providing adaptability through a straightforward rotational motion rather than complex adjustment mechanisms.
3Ease of operation
If hinge leaves are allowed to rotate freely, then door operation is smooth, but axial movement beyond desired amount occurs causing damage
Solution Approach 1:
The patent applies preliminary anti-action by pre-positioning teeth on the hinge pin that engage with corresponding features on the hinge leaves before excessive axial movement can occur. As the hinge leaves rotate during normal door operation, the teeth are already in place to prevent over-rotation, thereby counteracting the harmful effect before it can manifest.
Solution Approach 2:
The patent implements feedback through the mechanical engagement between the hinge pin teeth and the hinge leaves. As the hinge leaves rotate, the teeth provide continuous tactile and mechanical feedback that indicates the approaching limit of safe rotation. This feedback mechanism allows the system to automatically prevent excessive axial movement through the engagement geometry itself.
Data Source
AI summary
An adjustable door stop system. A hinge mounted door has a least one hinge leaf connected to the door, a least one hinge leaf connected to a doorway, and a hinge pin having an axis about which the hinge leaves rotate. A movement control cylinder includes a first finger extending radially and axially, a cylindrical portion substantially parallel to the axis of the hinge pin, and an axial opening. A movement control cap has a second finger extending radially and axially, a cylindrical portion substantially parallel to the axis of the hinge pin, and an axial opening. The cylindrical portion of the movement control cylinder engages the cylindrical portion of the movement control cap to prohibit rotational movement of the door beyond a selected position.