Full Pull-Out Guide Layout for Low-Height Stable Drawer Slides
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Solution Overview
Problem
Existing full extension guides for furniture parts face challenges in achieving mechanical stability while maintaining a low overall height, as they often result in a relatively large construction due to the arrangement and design of force-transmitting elements.
Innovation Solution
The solution involves arranging force-transmitting elements, such as spherical rolling bodies, in a way that they are eccentric and do not intersect the vertical center plane of the full extension slide, with some elements positioned in inner and outer raceways on the body and running rails, allowing for a horizontal offset that reduces the overall height and enables a compact structure. This arrangement ensures a homogeneous force transmission and allows the elements to absorb both vertical and lateral forces effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If spherical rolling elements are arranged in two vertical planes between the body rail and center rail, and center rail and running rail, then force transmission is achieved, but the overall height becomes relatively large
Solution Approach 1:
The patent transitions from a traditional two-vertical-plane arrangement to a three-dimensional configuration where rolling elements are positioned at different horizontal distances from the center plane. This spatial reconfiguration allows force transmission while reducing the vertical distance between rails, thereby decreasing overall height without compromising load-bearing capability
Solution Approach 2:
The patent employs asymmetric positioning of rolling elements relative to the center plane, with different horizontal offsets for elements in different locations. This asymmetric arrangement optimizes the load distribution and enables compact vertical spacing while maintaining mechanical stability and effective force transmission across the guide structure
2Stability of the object's composition
If rolling elements are arranged symmetrically with respect to a central plane, then structural balance is achieved, but the overall height increases
Solution Approach 1:
The patent deliberately breaks the traditional symmetry by positioning rolling elements at asymmetric horizontal distances from the center plane. Elements on opposite sides of the center are offset differently, creating an asymmetric configuration that reduces vertical spacing requirements while preserving structural balance through carefully distributed load paths and balanced moment arms
3Device complexity
If the running rail is arranged essentially above the cabinet rail, then the guide structure is simplified, but the overall height becomes relatively large
Solution Approach 1:
The patent introduces horizontal offset dimensions in addition to the vertical arrangement. By positioning rolling elements at different horizontal distances from the center plane, the design creates a three-dimensional force transmission path that allows the running rail to be positioned closer to the body rail vertically, reducing overall height while maintaining structural simplicity and functional effectiveness
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
This configuration enhances mechanical stability and reduces the overall height of the full extension guide, providing a more compact and efficient design that can handle forces uniformly, while also accommodating dimensional tolerances between the rails.
Implementation Method 1
spherical rolling bodies, which are arranged between the body rail and the middle rail on the one hand and the middle rail and the running rail on the other hand
Data Source
Figure 1
AI summary
The invention relates to a full pull-out guide for furniture parts, in particular for drawers, comprising a body rail (1) that can be attached to a stationary furniture part, comprising a running rail (4) that can be attached to a movable furniture part, comprising a middle rail (3), comprising an inner running path (9) arranged between the body rail (1) and the middle rail (3), on which a plurality of first force-transferring elements (7, 7', 7") are movably arranged, comprising an outer running path (10) arranged between the middle rail (3) and the running rail (4), on which a plurality of second force-transferring elements (8, 8', 8") are movably arranged, wherein on at least one side of a vertical middle plane (M) of the full pull-out guide an outer first force-transferring element (7') is arranged in a vertical middle plane (V1, V1'), which extends between a vertical middle plane (V2, V2') of an inner first force-transferring element (7"), which is arranged on the same side of the vertical middle plane (M) as the outer first force-transferring element (7') and/or on one of an inner second force transferring element (8"), which is arranged on the same side of the vertical middle plane (M) as the outer first force-transferring element (7') on the one hand, and a vertical middle plane (V3, V3') of an outer second force-transferring element (8'), which is arranged on the same side of the vertical middle plane (M) as the outer first force-transferring element (7') on the other hand.