Dishwasher Top Drawer Rail Structure for Full Extraction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing dishwashers with top racks limited by guide rails restrict the forward motion, preventing the effective use of rear portions and reducing loading capacity.

Innovation Solution

A dishwasher design featuring hanger arms and drawer arms configured in a reclining U shape, allowing the drawer to move independently of the rail, enabling full extraction and improved loading/unloading of the rear portions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If guide rails are mounted to the ceiling and the top rack is disposed to be movable on the rails, then the drawer can move forward and backward, but the forward motion is limited by the rails preventing full extraction

Engineering Contradiction:

Improvedrawer extractionVSAvoiddrawer travel distance

Core Design Contradiction:

Ease of operationVSLength of moving object

Solution Approach 1:

The movement system is divided into two independent segments: the rail assembly that moves on the hanger arm, and the drawer that moves on the drawer arm. This segmentation allows each component to have independent movement ranges, enabling the drawer to be fully extracted while the rail remains guided within the body.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention introduces a two-stage movement mechanism where the rail itself becomes movable along the hanger arm (first dimension), and the drawer moves along the movable rail (second dimension). This dimensional change allows the drawer to achieve full extraction distance that would be impossible with a fixed rail system.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Quantity of substance

If the drawer is limited by rails, then the structure is simple and stable, but the rear portions of the drawer cannot be used effectively reducing loading capacity

Engineering Contradiction:

Improveloading capacityVSAvoidmovement mechanism

Core Design Contradiction:

Quantity of substanceVSDevice complexity

Solution Approach 1:

The system transitions from a static rail structure to a dynamic two-stage movement system. The rail is no longer fixed but can move along the hanger arm, and the drawer moves along the movable rail. This dynamic configuration maximizes the usable volume of the drawer while maintaining structural stability through guided movement paths.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The movement mechanism employs a nested structure where the drawer is nested on the drawer arm, the rail is nested on the hanger arm, and the drawer moves on the rail. This nested arrangement allows compact storage when the drawer is retracted while enabling full extraction when needed, effectively utilizing the available space.

Inventive Principle:

Principle #7Nested doll (Nesting)

Data Source

PatentEP2326236B1A dishwasher

Publication Date: 2012.01.18 ARCELIK AS

Figure 1
Figure 2~3
Figure 4~5

AI summary

The present invention relates to a dishwasher (1 ) that comprises a body (2), a door (3) allowing access into the body (2), at least two hangers (4) secured oppositely on the ceiling (T) of the body (2), at least two rails (5) each secured to the hangers (4) and at least one drawer (6) installed to the rails (5) from the opposite sides to be movable thereon, wherein the items to be washed are emplaced.