Drawer Slide Catch Mechanism for Heat-Resistant Closed Holding
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Solution Overview
Problem
Existing drawer slide assemblies for appliances, particularly stoves, lack sufficient heat resistance, causing catch mechanisms made of plastic or rubber to malfunction at elevated temperatures, leading to issues with maintaining the drawer in a closed position.
Innovation Solution
A drawer slide assembly with a catch mechanism featuring a torsion spring arm pivotably mounted on a pivot point, using heat-resistant materials like stainless steel, which engages a projection to resist extension from the retracted position, ensuring the drawer remains closed until sufficient force is applied.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic or rubber catch mechanisms are used, then manufacturing cost is reduced and ease of manufacture is improved, but heat resistance deteriorates at elevated temperatures
Solution Approach 1:
The patent changes the material parameter from plastic/rubber to metal (stainless steel), fundamentally altering the thermal properties to withstand elevated temperatures while maintaining catch mechanism functionality. This material substitution resolves the heat resistance issue at the cost of increased manufacturing complexity.
Solution Approach 2:
The catch mechanism employs a composite structure combining metal components (stainless steel spring and arm) with potential polymer coatings or treatments, creating a material system that leverages both the heat resistance of metal and the manufacturing advantages of composite construction.
2Temperature
If metal catch mechanisms are used, then heat resistance is improved, but manufacturing cost increases and ease of manufacture deteriorates
Solution Approach 1:
The catch mechanism is divided into separate functional components: the spring element, the arm, and the mounting structure. This segmentation allows each part to be manufactured independently using optimal processes (e.g., stamping, forming) and then assembled, reducing overall manufacturing complexity despite using metal materials.
Solution Approach 2:
The spring-loaded arm automatically engages and disengages the catch projection through its own elastic deformation, eliminating the need for additional actuators, motors, or complex control mechanisms. This self-actuating design simplifies manufacturing while maintaining heat resistance.
3Stability of the object's composition
If magnetic elements are rigidly fixed, then structural stability is improved, but adaptability to temperature warping deteriorates
Solution Approach 1:
The catch mechanism transitions from a rigid fixed structure to a dynamic spring-loaded system. The spring arm can deform elastically to accommodate thermal expansion and warping of the drawer and cabinet, maintaining reliable engagement while adapting to temperature-induced dimensional changes.
Solution Approach 2:
The patent changes the structural parameter from rigid fixation to flexible spring-mounted configuration. This allows the catch mechanism to absorb dimensional variations caused by thermal effects while maintaining stable operation across a range of temperatures.
4Reliability
If spring force is increased, then reliability of closed position is improved, but friction and wear increase
Solution Approach 1:
The patent replaces high-friction mechanical contact systems with a spring-loaded engagement system where the spring arm contacts the projection at a single point or small surface area. This reduces wear compared to traditional slide catches while maintaining reliable holding force through elastic deformation.
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 reliable heat resistance, reducing wear and maintaining proper functioning across varying temperatures, enhancing the drawer's ability to remain closed and reducing assembly costs and friction.
Implementation Method 1
a spring arm having a first end portion mounted to the first rail on a pivot point and a second end portion having an anchorage point. The spring arm is pivotable between an original relaxed position and a resisting position
Implementation Method 2
two attractive magnets, or one magnet and another element made of magnetically susceptible material such as steel, which will be referred to as magnetic elements, are attached to the inner and outer rails
Data Source
AI summary
The invention concerns a drawer slide assembly, preferably for use in appliances, comprising a catch mechanism for resisting slide extension when the drawer is in a closed position. The catch mechanism is made of a spring arm pivotally mounted to one of the rails and an anchorage point provided in the other rail. When the assembly is moved to the closed position, the anchorage point engages and rotates the spring arm about its axis. Thus, opening the drawer requires a certain force to rotate the spring back. The use of a simple spring arm reduces friction between parts, reduces assembly costs and maintains desired flexibility and tolerance for drawer production and usage.