Extension guide
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Solution Overview
Problem
Existing extension guides for furniture drawers suffer from variable lateral load transmission and guidance due to the movement of guide means relative to the center and carcass rails, which is not optimal in all states, especially when push-out mechanisms are involved, leading to potential drawer distortion and unreliable activation.
Innovation Solution
The first guide means are connected to the carcass rail in a stationary manner, allowing for independent spacing and optimal guidance and load transmission, with rollers mounted rotatably about a vertical axis, and an attaching element that can be detachably connected for versatile support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If guide means are mounted on movable carriages, then the extension guide allows linear movement of the drawer, but the lateral support and guidance of the center rail becomes variable and not optimal in all states
Solution Approach 1:
The guide means are segmented into multiple independent rollers distributed along the center rail, with each roller capable of independent lateral adjustment. This segmentation allows each roller to adapt to varying lateral loads at different positions, providing consistent support throughout the extension range while maintaining linear movement capability
Solution Approach 2:
The guide means transition from a static fixed-position design to a dynamic adjustable design where rollers can move laterally relative to the center rail. This dynamic capability enables the guide means to maintain optimal contact and support under varying load conditions during drawer extension and retraction
2Device complexity
If guide means are spaced according to carriage length, then the structure is simplified, but the spacing is limited and cannot provide optimal guidance in all extension states
Solution Approach 1:
The guide means are divided into multiple independently adjustable roller units spaced along the center rail. Each roller can be positioned and adjusted independently, allowing optimal spacing distribution that provides consistent guidance throughout the entire extension range without requiring a complex overall structure
Solution Approach 2:
The spacing and position parameters of the guide rollers are made variable rather than fixed. Each roller can be adjusted to optimal positions based on specific extension states and load conditions, providing consistent guidance performance across all operational ranges while maintaining structural simplicity
3Ease of operation
If the extension guide uses movable guide means on carriages, then linear movement is enabled, but lateral load transmission is variable and may cause drawer distortion
Solution Approach 1:
The lateral load transmission is distributed across multiple segmented roller units rather than concentrated at single fixed points. Each roller independently supports lateral loads at its specific position, providing uniform load distribution that prevents drawer distortion while maintaining smooth extension movement
Solution Approach 2:
The guide rollers are designed with dynamic lateral adjustment capability, allowing them to automatically position themselves to optimize load transmission paths. This dynamic adaptation ensures consistent lateral support and maintains drawer alignment stability throughout the extension range
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 design provides reliable lateral support and smooth movement of the center rail, ensuring consistent guidance and load transmission regardless of the extension guide's state, and allows for easy replacement or adaptation of components.
Implementation Method 1
rollers mounted rotatably about a vertical axis for guidance of the center rail on the carcass rail and for supporting the center rail in a horizontal direction transverse to the extension direction
Data Source
AI summary
The invention relates to an extension guide (1) for mounting a movable furniture part linearly movably along an extension direction (2), comprising a carcass rail (10) which can be fixed to a furniture carcass, a drawer rail (50) which can be fixed to the movable furniture part, a linearly movable center rail (30) arranged between the carcass rail (10) and the drawer rail (50), and first guide means (72) for guiding the center rail (30), and for supporting the center rail (30) transversely to the extension direction (2), in particular in the horizontal direction. Improved lateral guidance and support of the center rail 30 on the carcass rail 10 is achieved in that the first guide means (72) are connected to the carcass rail (10) indirectly or directly in a stationary manner.