Guide device for guiding a movable part of a piece of furniture relative to the body of a piece of furniture
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Solution Overview
Problem
Conventional guide devices for furniture parts, such as drawers and doors, face issues with absorbing high weight and load forces, leading to lowering behavior that can result in collisions between the extension rail and the cabinet rail, especially in over-extension systems.
Innovation Solution
The guide device incorporates a pinion and toothed rack combination on both lower and upper rail guide means, providing supporting and stabilizing support to the middle rail, allowing it to absorb high weight and load forces while reducing the lowering behavior of the pull-out rail.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If over-extension is implemented to allow further pull-out distance, then the extension rail can be pulled out beyond the cabinet rail, but the middle rail loses its supporting role and collisions occur between the extension rail and cabinet rail
Solution Approach 1:
A middle rail is introduced as an intermediary component between the cabinet rail and extension rail. This middle rail acts as a mediator that maintains proper spacing and prevents direct contact between the cabinet rail and extension rail, thereby preventing collisions while enabling over-extension functionality.
Solution Approach 2:
The positioning of the middle rail is dynamically adjusted based on the extension state. During extension, the middle rail moves to maintain optimal spacing. The system changes the positional parameter of the middle rail to adapt to different extension distances, ensuring continuous support and preventing collisions throughout the motion range.
2Device complexity
If standard extension is used without over-extension, then the structure is simpler, but the pull-out distance is limited and cannot extend beyond the cabinet rail
Solution Approach 1:
The guide device is segmented into multiple independent rails (cabinet rail, middle rail, extension rail) that can move relative to each other. This segmentation allows the extension rail to be pulled out further by utilizing the intermediate space created by the movable middle rail, achieving over-extension without proportionally increasing overall structural complexity.
3Stability of the object's composition
If the middle rail is positioned to provide support, then stability is improved, but the extension rail cannot achieve full over-extension distance
Solution Approach 1:
The middle rail is designed with dynamic positioning capability, allowing it to move along the cabinet rail during extension. This dynamic adjustment enables the middle rail to maintain its supporting function at different positions, ensuring stability is preserved throughout the entire over-extension range rather than being fixed at a single position that would limit extension distance.
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
The solution effectively reduces the lowering behavior of the pull-out rail and enhances its stability, enabling the guide device to handle higher loads without collisions, even in over-extension configurations.
Implementation Method 1
the lower and upper rail support means each having a rack and pinion combination of at least one rack and at least one with the rack at Ein- ode r Auszug can be brought into meshing engagement or in meshing engagement pinion
Data Source
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AI summary
In a guide device for guiding a furniture part (12) that can be moved relative to a furniture body, in particular a drawer, door or flap, with at least one guide unit (13) which has a body rail (14) that can be fastened to the furniture body, a lower rail guide means (19) has a center rail (18) that is displaceably mounted relative to the cabinet rail (14) and an extension rail (25) that is displaceably mounted relative to the center rail (18) via upper rail guide means (24) and can be connected to a drawer, and wherein in addition to the lower rail guide means (19) lower rail support means (35) are provided to support the center rail (18) on the body rail (14), in addition to the upper rail guide means (24) there are upper rail support means (36) to support the extension rail (25 ) provided on the middle rail (18).