Slide Rail Unit with Lever Lock for Narrow-Space Device Detachment

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Solution Overview

Problem

Existing slide rail units require a large space to detach electronic devices with long depths and necessitate lifting heavy devices, leading to instability and inefficiency, especially when trying to detach or reattach in narrow spaces.

Innovation Solution

A slide rail unit design featuring an outer rail, a middle rail, and an inner rail with a lever that includes a projecting portion to lock the middle rail, allowing the inner rail to be detached without fully extending the slide rail unit, enabling easy detachment in a narrow space and reducing the need for extensive lifting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the electronic device is further drawn out to detach it from the cabinet, then the electronic device can be detached from the cabinet, but a large space is required in front of the cabinet

Engineering Contradiction:

Improvedetachability of electronic deviceVSAvoidspace required in front of cabinet

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The slide rail unit is divided into three independent rails (outer rail, middle rail, inner rail) that can be detached separately. The lever mechanism allows the middle rail to be locked and detached independently from the inner rail, enabling the electronic device to be removed in stages without requiring full extension of all rails simultaneously. This segmentation reduces the space needed for detachment operations.

Inventive Principle:

Principle #1Segmentation

2Ease of operation

If the electronic device is lifted upward to detach it from the slide rail unit, then the electronic device can be detached from the slide rail unit, but the slide rail unit shakes to right and left causing difficulty in fixing the electronic device

Engineering Contradiction:

Improvedetachability of electronic deviceVSAvoidstability of slide rail unit

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The lever mechanism segments the detachment process into controlled stages. By locking the middle rail and detaching only the inner rail first, the system maintains stability of the outer and middle rails during the detachment operation. This prevents the entire slide rail unit from shaking, making it easier to reattach the electronic device later.

Inventive Principle:

Principle #1Segmentation

3Ease of operation

If the middle rail is fully stretched to allow the inner rail to be drawn out, then each rail can slide smoothly, but the electronic device with long depth requires large space for detachment

Engineering Contradiction:

Improvesmooth sliding of railsVSAvoidspace required for detachment

Core Design Contradiction:

Ease of operationVSArea of stationary object

Solution Approach 1:

The lever mechanism performs a preliminary action by locking the middle rail before the detachment process begins. This allows the inner rail to be detached without requiring the middle rail to be fully extended first. The preliminary locking action enables smooth sliding to be maintained while reducing the space required for the detachment operation.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS10440854B2Slide rail unit

Publication Date: 2019.10.08 CLOUD BYTE LLC

AI summary

A slide rail unit includes: an outer rail; a middle rail housed in the outer rail, being slidable in a longitudinal direction of the outer rail; an inner rail housed in the middle rail, being slidable in a longitudinal direction of the middle rail; and a lever disposed between the outer rail and the middle rail, being slidable in the longitudinal direction of the outer rail. The lever includes a lever projecting portion configured to lock a slide of the middle rail when the lever is drawn out by a predetermined distance.