Slide Rail Kit with Recessed Structure for Wider Object Accommodation

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Solution Overview

Problem

Existing slide rail assemblies face limitations in structural strength and assembly complexity due to the need for additional extension members to accommodate larger objects, while maintaining a compact design.

Innovation Solution

A slide rail kit with a recessed structure on the first rail that allows a portion of the rack's side frame to extend into a concave space, enabling the second rail to carry wider objects without requiring the first rail to be shortened, thus maintaining structural integrity and simplifying assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If the first rail is shortened to reduce lateral space occupied, then the slide rail can fit within the space between front post and rear post, but the overall structural strength is reduced

Engineering Contradiction:
Improvelateral space occupiedVSAvoidoverall structural strength
Core Design Contradiction:
Area of stationary objectVSStrength

Solution Approach 1:

The recessed structure allows the side frame to extend into the concave space formed by the recessed structure, creating a nested configuration where the side frame is partially housed within the rail structure. This nesting arrangement maintains structural strength by utilizing the space efficiently without requiring the rail to be shortened.

Inventive Principle:
Principle #7Nested doll (Nesting)

2Area of moving object

If the first rail is shortened to accommodate wider objects, then the second rail can carry objects with larger width, but additional extension members are required increasing assembly complexity

Engineering Contradiction:
Improvewidth of carried objectVSAvoidassembly complexity
Core Design Contradiction:
Area of moving objectVSDevice complexity

Solution Approach 1:

The recessed structure integrates the function of what would otherwise require separate extension members into the first rail itself. By forming a concave space directly in the rail body, the design combines the support function and the space-providing function into a single structural feature, eliminating the need for additional components and simplifying assembly.

Inventive Principle:
Principle #5Merging (Combining)

3Area of stationary object

If the first rail is shortened to reduce lateral space, then the slide rail fits within rack boundaries, but the recessed structure requires the side frame to extend into concave space

Engineering Contradiction:
Improvespace between front post and rear postVSAvoidmounting configuration
Core Design Contradiction:
Area of stationary objectVSEase of operation

Solution Approach 1:

The recessed structure creates a localized concave space at a specific position on the first rail, allowing the side frame to extend into this localized area. This local modification enables the rail to maintain its overall length and structural integrity while providing the necessary space accommodation in a specific region.

Inventive Principle:
Principle #3Local quality

Data Source

PatentEP4576959B1Slide rail kit
Publication Date: 2026.03.18 KING SLIDE WORKS CO LTD
  • EP4576959B1 patent drawingFigure 1
  • EP4576959B1 patent drawingFigure 2
  • EP4576959B1 patent drawingFigure 3

AI summary

A slide rail kit (20, 200) includes a first rail (22, 208), a second rail (24) and a bracket device (28, 204) . The first rail (22, 208) has an outer side and an inner side. The second rail (24) is movable relative to the first rail (22, 208) and located adjacent to the inner side of the first rail (22, 208) . The bracket device (28, 204) is arranged on the first rail (22, 208) and includes a rack mounting feature (46, 206) . A recessed structure is formed at the outer side of the first rail (22, 208) and adjacent to the rack mounting feature (46, 206).