Tongue Latch with Plastic Protection Tip
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Solution Overview
Problem
Conventional metal sheet tongue latches are prone to rust and corrosion due to friction with other components, while plastic tongues lack mechanical resistance for weighted applications, leading to breakage and poor performance.
Innovation Solution
A metal tongue with a low-friction plastic protection tip, featuring a special sliding peripheral form and locking system, which is securely attached to the tongue and allows for inverted positioning, enhancing durability and preventing corrosion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal sheet tongues are used, then mechanical resistance is provided, but friction causes rust and corrosion
Solution Approach 1:
The invention combines metal sheet for the tongue body (providing mechanical resistance) with plastic material for the tip (providing low friction and corrosion resistance). This composite structure allows each material to contribute its advantageous properties, resolving the contradiction between strength and corrosion resistance.
Solution Approach 2:
Different parts of the tongue are made from different materials: the main body uses metal sheet for strength, while the tip uses plastic for low friction. This local differentiation of material properties allows the tongue to simultaneously achieve mechanical resistance and corrosion resistance where needed.
2Object-affected harmful factors
If plastic tongues are used, then friction is reduced, but mechanical resistance is insufficient for weighted applications
Solution Approach 1:
The invention uses a composite structure where the tongue body is made of metal sheet for mechanical strength to handle weighted applications, while the tip is made of plastic material to provide low friction. This resolves the contradiction between friction reduction and mechanical resistance.
Solution Approach 2:
The plastic material is applied locally only to the tip portion of the tongue where friction occurs, while the main body remains metal to provide structural strength. This localized application allows friction reduction without sacrificing overall mechanical resistance.
3Ease of manufacture
If painting is removed from metal tongues, then manufacturing is simplified, but corrosion resistance is lost
Solution Approach 1:
The invention replaces the need for painting by using plastic material on the tongue tip. The plastic inherently provides corrosion resistance without requiring additional protective coatings, thus maintaining ease of manufacture while preventing corrosion.
Solution Approach 2:
The plastic material acts as an intermediary protective layer between the metal tongue and the corrosive environment. It eliminates the need for painting while providing the necessary corrosion resistance through its inherent material 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
The solution provides a durable and corrosion-resistant tongue latch with improved mechanical resistance and smooth operation, suitable for both light and weighted applications, by reducing friction and ensuring reliable functionality.
Implementation Method 1
Said protection has a special sliding peripheral form that prevents friction between other elements of said latch
Data Source
AI summary
A tongue latch with a protection comprising a metal part folded to form a first longitudinal extension and a second longitudinal extension, the longitudinal extension terminates with a circular form having a squared hole, wherein the second extension has a lowered edge with special cuttings to lock the protection is provided. The protection comprises a hollow part made from a plastic material with low coefficient of friction and a mouthpiece with thin walls to better adjust to the dimensions of the tongue.