Face-Frame Hinge Spring Structure for Low-Friction Door Holding
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Solution Overview
Problem
Face-frame hinges experience short lifespan due to hard metal-on-metal friction, leading to abnormal noise and structural damage, and lack space for doors to stay open arbitrarily.
Innovation Solution
A face-frame hinge design featuring an internal groove with a connecting spring and limiting column to minimize metal-on-metal friction, allowing doors to stay open and control opening/closing through spring extension and compression, with corrosion-resistant metal components for durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If hard metal components are used for durability and strength, then the hinge can withstand prolonged use and resist corrosion, but hard metal-on-metal friction causes parts to damage quickly and generates abnormal noise
Solution Approach 1:
The patent introduces a connecting spring as an intermediary element between metal parts to replace direct metal-on-metal contact. The spring acts as a mediator that transmits force while preventing harmful friction, thereby resolving the contradiction between using hard metal for strength and avoiding metal-on-metal wear.
Solution Approach 2:
The patent changes the physical state and material properties by introducing elastic springs instead of rigid metal-to-metal contacts. This parameter change from rigid to elastic interaction reduces friction and wear while maintaining the structural strength required for hinge operation.
2Device complexity
If traditional hinge structure is used, then the design is simple, but there is no space for doors to stay open arbitrarily and the opening/closing lifespan is short
Solution Approach 1:
The patent segments the hinge into multiple functional components including hinge cups, connecting springs, limiting columns, and operational holes. This segmentation allows each component to perform a specific function, enabling the door to stay at arbitrary positions while maintaining a relatively simple overall structure.
Solution Approach 2:
The patent introduces dynamic elements such as connecting springs that can extend and compress to allow the door to remain at various angular positions. This dynamic capability enables arbitrary door positioning without significantly increasing structural complexity.
3Reliability
If metal components undergo galvanization for corrosion resistance, then the hinges resist rust in humid environments, but the hard metal surfaces still cause friction-related damage
Solution Approach 1:
The connecting spring serves as an intermediary that eliminates direct metal-on-metal contact, thereby preventing friction damage while preserving the galvanized metal surfaces for their intended corrosion-resistant function.
Solution Approach 2:
The patent applies different qualities to different parts: galvanization is applied to metal surfaces for corrosion resistance, while elastic spring materials are used in contact areas to eliminate friction, creating local optimization of properties.
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
Prolongs the hinge's service life by reducing friction, preventing abnormal noise, and enabling doors to stay open, while maintaining structural integrity and resistance to environmental factors.
Implementation Method 1
by means of normal extension and compression of the connecting spring disposed inside the component, hard metal-on-metal friction between a part and the connecting spring may be avoided
Implementation Method 2
A plurality of compression springs are disposed inside the rectangular groove; the other end of each compression spring is fixedly connected to a side clamping plate
Data Source
AI summary
A face-frame hinge includes a hinge plate. An internal groove is formed inside the hinge plate. An internal groove component plate is disposed inside the internal groove. A plurality of hinge cups are disposed inside the internal groove component plate. An operation hole is formed between adjacent hinge cups. A connecting spring is disposed inside the operation hole. A limiting column is disposed inside the connecting spring. The limiting column is convenient for limiting the position of the second rectangular plate in the connecting spring, thereby facilitating secure connection between structures and also facilitating the operation and use of components. The operation hole is convenient for carrying a structural component, facilitating normal operation and use of the component. The internal groove component plate is also convenient for carrying the structural component. Structural springs are located in the hinge cups.