Curved Guide Hole Door Hinge Reduces Friction
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Solution Overview
Problem
Conventional door hinges require excessive force to open due to frictional resistance from straight guide holes and lack mechanisms to maintain doors at predetermined angles or prevent collision with the ground during operation.
Innovation Solution
A door hinge design featuring a round, curved guide hole and elastic components, including a spring and locking jaws, allows the guide pin to move with reduced friction and automatically maintain door positions, preventing collisions and ensuring smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a straight-line guide hole is used, then the structure is simple and easy to manufacture, but excessive force is required to open the door due to frictional resistance
Solution Approach 1:
The guide hole is designed with a curved trajectory instead of a straight line, specifically with a rounded bottom portion and inclined upper portion. This curved path reduces frictional resistance during the guide pin's movement, allowing the door to be opened with less force while maintaining manufacturing feasibility.
2Device complexity
If a conventional hinge structure is used, then the construction is simple, but the door cannot be maintained at predetermined angles or prevented from colliding with the ground
Solution Approach 1:
The guide hole is segmented into distinct functional zones: a rounded bottom portion for smooth movement initiation and friction reduction, and an inclined upper portion for providing stopping force. This segmentation allows the single guide hole structure to perform multiple functions including angle maintenance and collision prevention without requiring additional complex components.
Solution Approach 2:
The curved guide hole structure enables the hinge to automatically maintain door at predetermined angles and prevent ground collision through its geometric design alone, without requiring external actuators or complex control mechanisms. The shape itself provides the necessary constraints and forces.
3Ease of operation
If a straight guide hole is used, then the guide pin moves in a simple path, but noise occurs during opening/closing operations
Solution Approach 1:
The curved guide hole with its rounded bottom portion enables the guide pin to move along a smooth arc-shaped trajectory, eliminating abrupt directional changes and reducing impact noise during door opening and closing operations, while still maintaining operational simplicity.
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 door hinge operates with less force required for opening, maintains predetermined angles, prevents ground collisions, and reduces noise during use by minimizing friction and using elastic components for secure door positioning.
Implementation Method 1
a spring and locking jaws, allows the guide pin to move with reduced friction
Data Source
AI summary
Provided is a door hinge. The door hinge includes a fixing member, an activating member, a guide pin, and a guide frame. The fixing member is installed at a door frame. The activating member is installed at a door, and connects with the fixing member by a hinge, and opens and closes the door. The guide pin is fitted into guide holes provided at both sides of the activating member, and elastically moves up/down along the guide hole by a tension force of a spring installed inside the activating member. A guide frame is combined to the guide pin, and connects at its lower end with the fixing member by a pin, and rotates about the pin depending on an operation of the activating member. The guide hole is round (R) shaped at its center, and has a curved shape in entirety.