Furniture Hinge Tilting Spring Mechanism Eliminates Metal Dragging Noise
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Solution Overview
Problem
Existing hinges for furniture doors suffer from annoying noise due to metal part dragging during opening and closing, inefficient door closure movement, and suboptimal performance of dampers in preventing door slamming.
Innovation Solution
A hinge design featuring a compression spring with a guide-spring stem and tilting action on a connecting rod, eliminating the need for a rocker lever and utilizing dual dampers to ensure smooth door closure, reducing noise and improving closure reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a rocker lever is used to transfer spring force to the connecting rod, then the hinge structure can provide door closure force, but it causes dragging between metal parts and generates noisy operation
Solution Approach 1:
The patent removes the rocker lever from the hinge mechanism entirely. Instead of using a rocker lever to transfer spring force, the invention directly connects the spring to the connecting rod through a pin, eliminating the source of dragging noise while preserving the door closure function.
Solution Approach 2:
The patent introduces a pin as a simple intermediary element to transfer force from the spring to the connecting rod. This pin-based connection replaces the complex rocker lever mechanism, achieving force transmission without metal-to-metal dragging during operation.
2Ease of operation
If traditional hinge structures are used, then the door can be opened and closed, but the structure becomes complicated and generates troublesome dragging noises
Solution Approach 1:
The patent extracts and removes the rocker lever component from the hinge assembly, simplifying the overall structure. The remaining components (fixed body, movable body, connecting rod, spring, and pin) work together with fewer parts, reducing complexity while maintaining full operational functionality.
Solution Approach 2:
The patent merges the force transmission function previously handled by the rocker lever directly into the spring-connecting rod connection through the pin. This consolidation eliminates unnecessary intermediate components and simplifies the mechanical linkage.
3Ease of operation
If the damper is arranged in the traditional hinge containment box, then the door closing movement can be dampened, but the damping function does not perform optimally
Solution Approach 1:
The patent repositions the damper from a traditional containment box arrangement to a new spatial configuration where it can more effectively influence the connecting rod's movement. This dimensional repositioning allows the damper to optimally control the door closing trajectory and velocity.
Solution Approach 2:
The damper acts as an intermediary element between the connecting rod and the fixed structure, providing controlled resistance to the closing movement. Its strategic placement allows it to mediate the force transmission and achieve optimal damping performance.
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 effectively eliminates metal part dragging, enhances door closure reliability, and optimizes the opening and closing movement by using a tilting spring mechanism and dual dampers to prevent slamming, resulting in a quieter and more efficient operation.
Implementation Method 1
the closing force of the door is determined by spring means acting, with a tilting action, on an extension of said connecting rod beyond the first hinge pin
Implementation Method 2
Said spring means comprise a compression spring held in position during tilting by a guide-spring stem
Implementation Method 3
a guide-spring stem sliding in a seat and having a head restrained to said extension of the connecting rod
Implementation Method 4
At least one shock absorber or damper is also provided, designed to dampen the closing movement, preventing the door from slamming
Data Source
AI summary
Hinge for the opening and the closing of hinged doors of furniture units, including a first fixed body designed to be housed in a seat of a horizontal plane of the structure of a furniture unit, such as a base or a top, and a second movable body designed to be housed in a seat of a door of the furniture unit, to actuate the door during opening and closing by way of a movement mechanism including at least one lever or connecting rod connecting a pin placed on the fixed part of the hinge and a pin placed on the movable part, wherein the closing force of the door is determined by a spring, the spring acting, with a tilting action, on an extension of the connecting rod beyond the hinge pin.