Mute Hinge Plastic Element Noise Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional metal hinges produce noise due to collisions and rubbing of their elements, and existing solutions like damping grease and lubricating oil are ineffective as they leak and stain, providing only short-term noise reduction.
Innovation Solution
A mute hinge design featuring two fixing leaves with knuckles, a pin, and at least one plastic element that encloses the pin and is located between the pin and the knuckles, reducing contact and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If damping grease and lubricating oil are applied to reduce noise, then noise reduction is achieved temporarily, but the grease and oil leak and stain environmental elements
Solution Approach 1:
The patent introduces a plastic element as an intermediary between the metal pin and metal knuckles. This plastic intermediary prevents direct metal-to-metal contact that causes noise, while also eliminating the need for lubricating oils and damping grease, thereby preventing staining of environmental elements.
Solution Approach 2:
The patent replaces the mechanical lubrication system (damping grease and lubricating oil) with a plastic element that provides noise reduction through material properties rather than requiring external lubricants. This substitution eliminates the harmful staining effect while maintaining noise reduction functionality.
2Object-affected harmful factors
If damping grease and lubricating oil are used to reduce noise, then noise is reduced temporarily, but the effect is short-lived as the grease and oil leak or dry out
Solution Approach 1:
The patent replaces the short-lived lubricating materials (damping grease and lubricating oil that leak or dry out) with a durable plastic element that provides long-term noise reduction. The plastic element is designed to last throughout the product's service life, eliminating the need for periodic reapplication or maintenance.
Solution Approach 2:
The plastic element provides self-sustaining noise reduction without requiring external maintenance, reapplication, or monitoring. Unlike lubricating oils that need periodic replenishment, the plastic element maintains its noise-reducing function throughout its service life through its inherent material properties.
3Strength
If metal elements are used in the hinge, then structural strength is achieved, but collisions and rubbing between metal elements produce noise
Solution Approach 1:
The patent applies local quality modification by introducing a plastic element specifically at the contact interface between metal pin and metal knuckles, while maintaining metal construction for the overall hinge structure. This localized plastic insertion provides noise reduction at the critical contact point without compromising the overall structural strength of the metal hinge components.
Solution Approach 2:
The patent creates a composite structure by combining metal components (pin and knuckles) with a plastic element at the contact interface. This composite approach leverages the strength of metal for structural integrity while utilizing the noise-absorbing properties of plastic at the friction interface, achieving both strength and noise reduction simultaneously.
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 mute hinge effectively reduces noise by minimizing contact between metal elements, maintains silence for a longer duration than traditional lubricants, and avoids environmental staining and cleaning issues.
Implementation Method 1
the plastic element is mounted between the pin and the knuckles of the fixing leaves. Therefore, when the mute hinge is working, i.e. the fixing leaves pivot with respect to each other about the pin and the plastic element, the knuckles of the fixing leaves may not contact and rub the pin and thus the noise is reduced
Data Source
AI summary
A mute hinge is provided with two fixing leaves, a pin, and at least one plastic element. Each one of the fixing leaves has at least one knuckle. The pin is mounted through the at least one knuckle of each one of the fixing leaves. The at least one plastic element encloses the pin and is located between the pin and the at least one knuckle of the fixing leaves. Therefore, the mute hinge makes no noise since the plastic element is mounted between the pin and the knuckles of the fixing leaves, and thus the knuckles of the fixing leaves may not contact and rub the pin.