Slide unit
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Solution Overview
Problem
Conventional middle slide rails in drawer guide systems suffer from stress concentration and deformation due to their flat plate shape, leading to increased manufacturing costs and reduced durability, as well as corrosion issues due to complex roll forming processes.
Innovation Solution
A slide unit design featuring a multilayer rolling process for the inner rail, incorporating slide balls of different diameters and a specific geometric configuration to minimize torsion angles and stress concentration, with reinforcing features to enhance durability and facilitate smooth sliding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a flat plate shape is used for the middle slide rail, then the manufacturing process is simple, but stress concentration and deformation occur leading to reduced durability
Solution Approach 1:
The patent applies curvature by forming the inner rail with a bent connection part instead of a flat plate shape. The bent configuration distributes stress more evenly during drawer operation, preventing stress concentration and deformation while maintaining manufacturing feasibility through roll forming processes.
Solution Approach 2:
The patent employs a multilayer structure for the inner rail, creating a composite configuration that enhances strength and durability. The multilayer design provides better stress distribution and resistance to deformation compared to a single flat plate, while still being manufacturable through rolling processes.
2Strength
If a complicated roll forming process is used for the middle slide rail, then the structural strength is improved, but manufacturing cost increases and productivity decreases
Solution Approach 1:
The patent divides the inner rail into distinct functional segments: insertion parts for receiving slide balls and bent connection parts for structural strength. This segmentation allows each part to be optimized independently while maintaining overall manufacturability through standard roll forming processes, improving both strength and productivity.
Solution Approach 2:
The patent optimizes geometric parameters of the bent connection part, specifically setting the angle between extending portions within 90-180 degrees. This parameter optimization achieves the necessary structural strength while maintaining compatibility with efficient roll forming manufacturing processes, thereby improving productivity.
3Strength
If a complicated roll forming process is used for the middle slide rail, then the structural strength is improved, but manufacturing cost increases
Solution Approach 1:
The patent segments the inner rail into standardized insertion parts and bent connection parts, allowing each to be manufactured using conventional roll forming techniques. This segmentation reduces manufacturing process complexity while maintaining structural strength through optimized geometry rather than complex multi-step forming.
Solution Approach 2:
The patent specifies optimal angle parameters (90-180 degrees) for the bent connection part that achieve required structural strength using standard manufacturing capabilities. This parameter-based approach avoids the need for complex specialized processes, reducing manufacturing complexity and cost.
4Device complexity
If the conventional middle slide rail structure is used, then the design is simple, but torsion angle increases leading to rail damage and deformation
Solution Approach 1:
The patent introduces a bent connection part with specific angular geometry (90-180 degrees) that provides torsional resistance. This curved configuration effectively reduces the torsion angle during drawer operation, preventing rail damage while maintaining design simplicity through a single bent element rather than complex multi-component assemblies.
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 reduces stress concentration and torsion angles, lowers manufacturing costs, prevents deformation, and improves durability by allowing uniform plating, while ensuring smooth sliding and enhanced load-bearing capacity.
Implementation Method 1
a plurality of slide balls 400 inserted in the first accommodation space 110 to be disposed between the fixed rail 100 and the inner rail 300, and inserted in the second accommodation space 210 to be disposed between the movable rail 200 and the inner rail 300
Data Source
AI summary
A slide unit includes a fixed rail fixed to a main body, and provided with a first accommodation space, a movable rail connected to a drawer body to allow the drawer body to be pulled out from and pushed into the main body, provided with a second accommodation space, and configured to be movable with respect to the fixed rail, an inner rail configured such that a first end thereof is inserted in the first accommodation space and a second end thereof is inserted in the second accommodation space, so as to allow the movable rail to be slidable with respect to the fixed rail, and a plurality of slide balls inserted in the first accommodation space to be disposed between the fixed rail and the inner rail, and inserted in the second accommodation space to be disposed between the movable rail and the inner rail.