Sliding rail device

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional sliding rail devices fail to prevent multiple server chassis from moving outwardly when one is pulled out, leading to potential misalignment and instability in server racks.

Innovation Solution

A sliding rail device with a blocking mechanism that includes an exterior frame, outer rail, intermediate rail, and a blocking mechanism featuring a positioning member, blocking member, and resilient member, which synchronously moves linked sliding rail devices to prevent unwanted outward movement by engaging a linking member via a blocking protrusion and resilient force.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional sliding rail device is used without a blocking mechanism, then the device structure is simple, but multiple server chassis cannot be prevented from moving outwardly when one is pulled out

Engineering Contradiction:

Improveprevention of unintended movementVSAvoidstructure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The blocking mechanism applies preliminary counter-action by positioning the blocking protrusion and blocking groove in advance to prevent unintended outward movement of adjacent server chassis before such movement can occur. The resilient member pre-loads the blocking mechanism to maintain readiness for engagement.

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The positioning member acts as an intermediary element that transmits the blocking force from the blocking mechanism to the linking member, thereby preventing unintended movement of adjacent sliding rail devices while maintaining system connectivity through the linking member.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If a blocking mechanism is added to prevent unintended movement, then reliability improves, but device complexity increases

Engineering Contradiction:

Improvestability of server chassisVSAvoidblocking mechanism complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The blocking mechanism is segmented into distinct functional components: blocking member (with blocking groove and blocking protrusion), positioning member (with positioning portion), and resilient member. This segmentation allows each component to perform its specific function while maintaining overall simplicity and ease of assembly.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of using a complex locking mechanism that requires active engagement, the design inverts the approach by using a resilient member that passively maintains blocking readiness through pre-loaded elastic force, which automatically engages when needed without complex control systems.

Inventive Principle:

Principle #13The other way round (Inversion)

3Ease of operation

If the positioning member moves along the inclined portion, then synchronized movement of multiple sliding rail devices is achieved, but friction and wear increase

Engineering Contradiction:

Improvesynchronized movementVSAvoidmechanical wear

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The inclined portion provides a curved guiding path for the positioning member, replacing complex multi-component linkage mechanisms with a simple inclined surface that naturally guides synchronized movement through geometric constraint, reducing the number of moving parts and potential wear points.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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

Prevents unintended outward movement of connected sliding rail devices, ensuring synchronized and stable operation of multiple server chassis within a server rack.

Implementation Method 1

the positioning member is driven by the resilient force of the resilient member, via the linking piece, to move upwardly along the inclined portion

Methodology Applied

Scientific EffectElastic force: Elasticity

Data Source

PatentUS20260007230A1Sliding rail device

Publication Date: 2026.01.08 FIRST DOME

AI summary

A sliding rail device includes an exterior frame, an outer rail, an intermediate rail, and a blocking mechanism that has a positioning member, a blocking member having a blocking protrusion and a blocking groove, a linking piece sleeved on the positioning member, and a resilient member. When the intermediate rail is moved relative to the outer rail in a longitudinal direction, the positioning member is pushed by the blocking member to move downwardly along an inclined portion of the blocking groove, and is consequently adapted to move a linking member downwardly. When the intermediate rail is moved in a direction opposite to the longitudinal direction relative to the outer rail, the positioning member is driven by a resilient force of the resilient member, via the linking piece, to move upwardly along the inclined portion.