Door Hinge Damper for Smooth, Controlled Closure
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Solution Overview
Problem
Conventional door hinges with compression springs fail to generate sufficient compression force to slow down the rotation speed of doors during closure, leading to high-speed closure and potential damage to mechanisms and safety hazards.
Innovation Solution
A door hinge design featuring a damper and link shaft mechanism that allows smooth opening and closing by enabling the link shaft to move and rotate within a hole centered on the hinge shaft, utilizing a damper to control the door's motion and a sub-spring assembly to prevent opening due to heat.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a compression spring is used to slow down door rotation, then the door can rotate slowly at the start section, but the compression force is insufficient to support the door load during the progress section
Solution Approach 1:
The door hinge mechanism is divided into multiple functional sections: a start section with a compression spring for initial slow rotation, and a progress section with a damper for continued controlled movement. This segmentation allows each component to optimize its force generation for specific phases of door operation, resolving the contradiction between initial slow rotation and sustained load support.
Solution Approach 2:
The system transitions from a static compression spring to a dynamic damper that maintains effective force generation throughout the door's movement range. The damper provides velocity-dependent damping force that adapts to the door's motion state, ensuring sufficient force support during the progress section while maintaining smooth operation.
2Productivity
If the door closes at high speed during the progress section, then the closing operation completes quickly, but the mechanism is damaged due to impact
Solution Approach 1:
The damper is positioned to engage during the progress section of door closure, providing controlled resistance before the door reaches its final position. This beforehand cushioning effect prevents high-speed impact with the mechanism while maintaining efficient closing operation, thereby protecting the mechanism and extending service life.
3Ease of operation
If the link shaft is fixed at the hinge shaft center, then the structure is simple, but the door cannot be opened with small force
Solution Approach 1:
The link shaft is designed to move dynamically within the hole centered on the hinge shaft during door rotation. This dynamic movement allows the link shaft to optimize its position for force transmission, enabling the door to be opened with minimal force while maintaining structural simplicity through the use of a straightforward hole-centered mechanism.
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
Facilitates stable, smooth opening and closing of doors with minimal force, preventing damage from high-speed closure and heat-induced opening.
Implementation Method 1
a damper provided inside the damper casing, one side of which is supported by the rivet, and the other side of which is connected to the fourth opening by a pin to move along the periphery of the arm, wherein when the door is opened the main links move linearly and the damper is compressed by the movement of the rivet and when the door is closed the periphery of the arm is in contact with the other side portion of the damper by the pivoting of the arm so that the damper is compressed
Implementation Method 2
a main spring assembly including a spring lever and a main spring inserted into the spring lever and being connected to the third and the fifth openings by a pin
Data Source
AI summary
Proposed is a door hinge that includes an arm installed on a door, a housing installed in a main body of a mechanism provided with a door and connected to the arm by a hinge shaft, a damper casing connected to the arm inside the housing by the hinge shaft and having one surface supported by a support portion of the housing, a pair of main links connected to the arm inside the housing by a link shaft to linearly move, a main spring assembly including a spring lever and a main spring inserted into the spring lever, and a damper provided inside the damper casing and moving along the periphery of the arm.